[go: up one dir, main page]

CN116607006A - Method and equipment system for sintering production of sintered flue gas desulfurization ash by matching - Google Patents

Method and equipment system for sintering production of sintered flue gas desulfurization ash by matching Download PDF

Info

Publication number
CN116607006A
CN116607006A CN202310458988.5A CN202310458988A CN116607006A CN 116607006 A CN116607006 A CN 116607006A CN 202310458988 A CN202310458988 A CN 202310458988A CN 116607006 A CN116607006 A CN 116607006A
Authority
CN
China
Prior art keywords
flue gas
sintering
mass fraction
powder
fuel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310458988.5A
Other languages
Chinese (zh)
Inventor
张辉
宫作岩
彭彬
刘杰
张铭洲
张磊
徐礼兵
刘帅
魏泽奇
靳珣
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Angang Steel Co Ltd
Original Assignee
Angang Steel Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Angang Steel Co Ltd filed Critical Angang Steel Co Ltd
Priority to CN202310458988.5A priority Critical patent/CN116607006A/en
Publication of CN116607006A publication Critical patent/CN116607006A/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/16—Sintering; Agglomerating
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
    • C10L5/00—Solid fuels
    • C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
    • C10L5/04—Raw material of mineral origin to be used; Pretreatment thereof
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
    • C10L5/00—Solid fuels
    • C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
    • C10L5/06—Methods of shaping, e.g. pelletizing or briquetting
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
    • C10L9/00—Treating solid fuels to improve their combustion
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
    • C10L9/00—Treating solid fuels to improve their combustion
    • C10L9/10—Treating solid fuels to improve their combustion by using additives
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Metallurgy (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Treating Waste Gases (AREA)

Abstract

The invention provides a method and a device system for sintering production of sintered flue gas desulfurization ash in a matching way, wherein the method comprises the following steps: pretreating fuel; preparing a sintering material; firing and sintering the cloth; and (5) circulating sintering flue gas. The equipment system comprises a sintering machine, a material distribution system, an ignition system, an exhaust system, a discharging and crushing device and an annular cooler, wherein the material distribution system comprises a first material distribution device and a second material distribution device, the exhaust system comprises a flue gas circulation system and a flue gas discharge purification system, the flue gas circulation system comprises a front air box system, a front air box flue, a first dust remover, a circulation drainage fan, a flue gas dehumidification mixer, a circulation flue gas main pipeline, a circulation booster fan and a circulation flue gas sealing cover, and the flue gas discharge purification system comprises a rear air box system, a rear air box flue, a second dust remover, a flue gas discharge fan, an active carbon desulfurization and denitration system, a sulfur and nitrogen pollutant detector and a discharge chimney. The invention solves the problems of reduced air permeability of the sinter bed and exceeding standard of smoke emission caused by adding desulfurization ash.

Description

Method and equipment system for sintering production of sintered flue gas desulfurization ash by matching
Technical Field
The invention relates to the technical field of iron-making production, in particular to a method and a device system for sintering flue gas desulfurization ash back-mixing sintering production.
Background
With the increasingly prominent problem of atmospheric pollutant discharge, the sintering flue gas desulfurization project has developed a construction hot tide in China in recent years. The semi-dry flue gas desulfurization technology is one of the main methods adopted by the sintering flue gas desulfurization in China at present because of simple process, mature technology, low raw material cost and small occupied area.
The desulfurization by-product desulfurization ash produced by the semi-dry desulfurization technology mainly comprises the following components: calcium sulfite, calcium sulfate, calcium oxide, calcium carbonate, calcium hydroxide, and the like. The desulfurization ash has the characteristics of unstable components, alkalinity, easy decomposition, easy expansion due to water absorption and the like, belongs to solid waste which is difficult to treat and difficult to recycle resources, can be treated by adopting a filling and burying mode at present, not only pollutes the environment, occupies the land, but also has great potential safety hazard.
Many universities and enterprises have conducted a great deal of research on comprehensive utilization of sintered flue gas desulfurization ash, mainly from backfilling, road construction, acid soil improvement, autoclaved brick production, dry powder mortar production, ceramsite production, cement retarder production and CaSO preparation after modification and oxidation 4 The whisker and other aspects begin to treat the desulfurization ash. Preparation of SO by roasting semi-dry type sintered flue gas desulfurization ash in Tang Chao fluidized bed furnace 2 In the university of Wuhan science and technology, studies of Shu, 2016, reference is made to the preparation of SO by roasting desulfurization ash in a fluidized bed furnace incorporating sulfuric acid 2 Study of different oxygen partial pressure conditions CaSO 3 The decomposition condition and the reaction behavior of feeding the desulfurized fly ash, pyrite and ferrous sulfate mixture from the lower part of the fluidized bed furnace are studied; the main purpose of the study is to obtain SO by heating and decomposing sulfur-containing substances 2 Sulfuric acid is produced, but the sulfur content in the residual product after decomposition is very high, and the decomposed solid product is difficult to effectively use.
The patent CN103627893A discloses a method for producing sintered ore by using flue gas desulfurization ash of a calcium method dry method and a semi-dry method, wherein the flue gas desulfurization ash of the calcium method dry method and the semi-dry method is added into a sintering mixture according to the mass percentage of 0.5-11.8%, then water is added, mixed, pelletized and sintered according to a conventional method, so as to obtain the finished product sintered ore, and a sintering cup test and an industrial test are carried out to directly return the desulfurization ash as a flux for sintering. However, in the method of the present invention, the CaSO is used as a catalyst 3 Is extremely easy to be oxidized into CaSO 4 The sulfur content in the sinter is increased due to the residue in the sinter, which is unfavorable for blast furnace smelting, and the ventilation property of the sinter layer is deteriorated due to the addition of the desulfurization ash, so that the utilization coefficient of the sintering machine is seriously reduced, and the utilization of the method in the metallurgical industry is limited.
Patent cn201911151098.X discloses a method and a system for recycling resources of desulfurization ash, wherein the method comprises the following steps: washing the desulfurized ash with water, and carrying out solid-liquid separation to obtain solid residues rich in calcium sulfite and calcium sulfate and a solution rich in calcium hydroxide; pulping: preparing a desulfurization slurry from the solution rich in calcium hydroxide; and (3) roasting: roasting the solid residue rich in calcium sulfite and calcium sulfate under the action of a reducing agent to obtain flue gas rich in sulfur dioxide and residue rich in calcium oxide.
In recent years, many researches on the utilization of the desulfurization ash resources are carried out, but most of the existing researches are stopped in a laboratory stage, and the solid waste digestion treatment function of a metallurgical enterprise is neglected, so that a method for utilizing the desulfurization ash in a large amount with low cost and high efficiency is necessary to be developed, and the economic and environmental protection dual purposes of recycling and comprehensive utilization of the desulfurization ash are realized.
Disclosure of Invention
According to the prior research provided by the prior art, the technical problem of the solid waste digestion treatment function of metallurgical enterprises is ignored, and the method and the equipment system for sintering production of the sintered flue gas desulfurization ash are provided.
The invention adopts the following technical means:
a method for sintering flue gas desulfurization ash back-mixing sintering production comprises the following steps:
s1, preprocessing fuel;
s11, granulating coke powder, biomass carbon powder, desulfurized fly ash and ethanolamine aqueous solution to obtain lower-layer pretreatment fuel;
s12, granulating the coke powder, the activated carbon powder added with the quicklime slaking solution and the aqueous solution of ethanolamine to obtain an upper-layer pretreatment fuel;
s2, preparing a sintering material;
s21, uniformly mixing iron ore powder, lower-layer pretreatment fuel, desulfurized fly ash and quicklime, and granulating to obtain a lower-layer sintered material;
s22, uniformly mixing and granulating iron ore powder, upper-layer pretreated fuel, limestone and quicklime to obtain an upper-layer sintered material;
s3, material distribution ignition sintering;
s31, adding lower sintered material cloth to the bottom of the trolley through a first material distribution device to form a lower material layer; adding the upper sintering material cloth to the lower sintering material surface through a second material distribution device to form an upper material layer;
s32, igniting the upper and lower layers of sintering materials by an ignition system, and starting to perform ventilation sintering;
s4, sintering flue gas circulation: in the sintering process, the flue gas at the front part of the sintering machine is mixed with the waste gas at the middle temperature section of the circular cooler through a flue gas circulation system to form final circulation flue gas, and the final circulation flue gas returns to the rear sintering material surface of the sintering machine; the flue gas at the rear part of the sintering machine is directly discharged after being treated by a flue gas discharge purification system; the front smoke of the sintering machine is discharged by a front bellows and corresponds to the waste gas generated by the front sintering material; and the rear flue gas of the sintering machine is discharged from the rear bellows and corresponds to the waste gas generated by the rear sintering material.
Further, the specific steps of the step S11 are as follows: forming lower fuel by coke powder and biomass carbon powder; taking the lower-layer fuel as a balling core, taking desulfurized fly ash as adhesive powder, spraying an ethanolamine aqueous solution for pelletization to obtain a lower-layer pretreatment fuel;
in the lower layer pretreatment fuel, the mass fraction of coke powder is 40% -45%, the mass fraction of biomass carbon powder is 30% -35%, the mass fraction of desulfurization ash is 20% -25%, and the mass fraction of ethanolamine is 2% -4%.
Further, the specific steps of the step S12 are as follows: forming upper layer fuel by coke powder and activated carbon powder; taking the upper layer fuel as a balling core, adding activated carbon powder of quicklime slaking solution as adhesive powder, spraying ethanolamine aqueous solution for pelletization to obtain the upper layer pretreatment fuel;
in the upper layer pretreatment fuel, the mass fraction of the coke powder is 65-70%, the mass fraction of the activated carbon powder is 20-25%, the mass fraction of the quicklime is 5-10%, and the mass fraction of the ethanolamine is 0.5-2.5%.
Further, in the lower-layer sintered material, the mass fraction of iron ore powder is 80-85%, the mass fraction of lower-layer pretreated fuel is 6-10%, the mass fraction of desulfurized ash is 5-8%, and the mass fraction of quicklime is adjusted to enable the alkalinity of the lower-layer sintered material to be 1.9-2.1;
in the upper layer sintering material, the mass fraction of the iron ore powder is 81-86%, the mass fraction of the upper layer pretreatment fuel is 4-8%, the mass fraction of the quicklime is 3-7%, and the mass fraction of the limestone is adjusted to enable the alkalinity of the upper layer sintering material to be 2.1-2.3.
Further, in the step S31, the total height of the upper material layer and the lower material layer is 850mm to 1050mm, wherein the height of the lower material layer is the total height of the material layers
Further, in the step S4, the number of front bellows is the total number of bellows of the sintering machineThe number of the rear bellows is +.>
Further, in the step S4, the temperature of the final circulating flue gas is 200-280 ℃, and the oxygen concentration is more than or equal to 19%.
Further, the desulfurization ash is waste generated by sintering flue gas semi-dry desulfurization; the biomass carbon powder is solid fuel generated by thermochemical reaction of biomass under anaerobic or anoxic conditions, and the mass fraction of the fixed carbon is 70% -80%.
Further, the activated carbon powder is waste generated by a sintering flue gas activated carbon desulfurization and denitrification system.
The invention also provides a device system for realizing the method for producing the sintered flue gas desulfurization ash by back-mixing sintering, which comprises the following steps: the device comprises a sintering machine, a material distribution system, an ignition system, an exhaust system, a discharging and crushing device and a circular cooler; the material distribution system comprises a first material distribution device and a second material distribution device positioned behind the first material distribution device, wherein the first material distribution device is used for adding lower-layer sintering materials to the sintering machine cloth, and the second material distribution device is used for adding upper-layer sintering materials to the sintering machine cloth;
the exhaust system comprises a smoke circulation system and a smoke discharge purification system, the smoke circulation system comprises a front air box system, a front air box flue, a first dust remover, a circulation drainage fan, a smoke dehumidifying mixer, a circulation smoke main pipeline, a circulation booster fan and a circulation smoke sealing cover, and the circular cooler comprises a medium-temperature smoke heat preservation cover; the front air box system is positioned below the sintering trolley and comprises a plurality of front air boxes which are connected with a front air box flue; the front air box flue, the first dust remover, the circulating drainage fan and the flue gas dehumidifying mixer are sequentially connected through a flue gas pipeline, and the medium-temperature flue gas heat preservation cover is connected with the flue gas dehumidifying mixer through a circulating flue gas pipeline; the smoke dehumidifying mixer, the circulating booster fan and the circulating smoke sealing cover are sequentially connected through a circulating smoke main pipeline, and the circulating smoke sealing cover is arranged at the upper part of the rear sintering material surface;
the flue gas emission purification system comprises a rear air box system, a rear air box flue, a second dust remover, a flue gas emission exhaust fan, an active carbon desulfurization and denitrification system, a sulfur and nitrogen pollutant detector and an emission chimney, wherein the rear air box system comprises a plurality of rear air boxes which are all connected with the rear air box flue; the rear bellows flue, the second dust remover, the flue gas external exhaust fan, the active carbon desulfurization and denitrification system and the external flue gas chimney are sequentially connected through a flue gas pipeline, and the sulfur nitrogen pollutant detector is arranged between the active carbon desulfurization and denitrification system and the external flue gas chimney.
Compared with the prior art, the invention has the following advantages:
1. the method and the equipment system for sintering production by blending the sintering flue gas desulfurization ash provided by the invention have the advantages that the fuel added with the desulfurization ash and the additive ethanolamine is uniformly mixed and pelletized to prepare the pretreated fuel, and the pretreated fuel and the precast desulfurization ash cloth are added to the lower sintering material layer, so that the problem of reduced air permeability of the sintering material layer caused by adding the desulfurization ash is solved, the ore forming reaction condition of the sintering material can be improved, the quality of the sintering mineral products is improved, and the stable and smooth operation of the sintering production by blending the desulfurization ash is facilitated.
2. According to the method and the equipment system for sintering production by blending the sintering flue gas desulfurization ash, the height proportion of the upper and lower material layers is corresponding to the proportion of the circulating flue gas bellows, so that the flue gas of the upper material layer without adding the desulfurization ash is recycled, and the flue gas of the lower material layer with adding the desulfurization ash is not recycled; on one hand, the influence of the addition of the desulfurization ash on the upper material layer is avoided, and on the other hand, the mineralization reaction condition of the lower material layer after the addition of the desulfurization ash is improved, so that the yield of the sintered ore can be improved, and the solid burnup is reduced.
3. The method and the equipment system for sintering production by matching the sintering flue gas desulfurization ash are provided by the invention, the prefabricated particle desulfurization ash cloth is added to the lower sintering material layer, and meanwhile, the front bellows sintering flue gas is circulated to the rear sintering material level, SO that SO in the sintering flue gas can be realized 2 And NO x Enriching, reducing waste gas treatment capacity, improving desulfurization and denitration efficiency, and solving the problem of exceeding of sintering flue gas emission caused by desulfurization ash matching.
In conclusion, the technical scheme of the invention can solve the problems of reduced air permeability of the sinter bed and exceeding standard of smoke emission caused by the back-mixed sintering production of the desulfurized fly ash.
Based on the reasons, the invention can be widely popularized in the fields of desulfurization ash resource utilization and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to the drawings without inventive effort to a person skilled in the art.
FIG. 1 is a flow chart of the method of the present invention.
FIG. 2 is a schematic view of the structure of the device of the present invention.
In the figure: 1. a first distributing device; 2. a second distributing device; 3. an ignition system; 4. a lower material layer; 5. an upper material layer; 6. a front bellows stack; 7. a rear bellows flue; 8. a front bellows system; 9. a rear bellows system; 10. a flue gas duct; 11. a first dust collector; 12. a circulating drainage fan; 13. a flue gas dehumidifying mixer; 14. a medium-temperature flue gas heat-insulating cover; 15. a main circulating flue gas pipe; 16. a circulating booster fan; 17. a circulating smoke seal cover; 18. a second dust collector; 19. an exhaust fan outside the flue gas; 20. an active carbon desulfurization and denitrification system; 21. a sulfur nitrogen contaminant detector; 22. an exhaust chimney; 23. and a discharging and crushing device.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be clear that the dimensions of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
The invention provides a method for sintering flue gas desulfurization ash back-mixing sintering production, belongs to the technical field of iron-making production, and relates to sintering production technology. The invention aims to solve the problems of reduced air permeability of a sinter bed and exceeding standard of smoke emission caused by the desulfurization ash blending sintering production, improve the desulfurization efficiency, reduce the sintering burn-up and realize the desulfurization ash blending sintering production.
As shown in fig. 1, the method for producing the sintered flue gas desulfurization ash by back-mixing sintering comprises the following steps:
(1) Pretreatment of fuel: the coke powder and the biomass carbon powder form lower fuel; the lower-layer fuel is taken as a balling core, the desulfurized fly ash is taken as adhesive powder, and ethanolamine aqueous solution is sprayed for pelletization to obtain lower-layer pretreatment fuel, wherein the mass fraction of coke powder is 40% -45%, the mass fraction of biomass carbon powder is 30% -35%, the mass fraction of desulfurized fly ash is 20% -25%, and the mass fraction of ethanolamine is 2% -4%;
the coke powder and the activated carbon powder form an upper layer fuel; taking the upper layer fuel as a balling core, adding active carbon powder of quicklime slaking solution as adhesive powder, spraying ethanolamine aqueous solution for pelletization to obtain the upper layer pretreatment fuel, wherein the mass fraction of the coke powder is 65-70%, the mass fraction of the active carbon powder is 20-25%, the mass fraction of the quicklime is 5-10%, and the mass fraction of the ethanolamine is 0.5-2.5%;
(2) Preparing a sintering material: the lower sintered material is prepared by uniformly mixing and granulating iron ore powder, lower pretreatment fuel, desulfurized ash and quicklime, wherein the mass fraction of the iron ore powder is 80-85%, the mass fraction of the lower pretreatment fuel is 6-10%, the mass fraction of the desulfurized ash is 5-8%, and the mass fraction of the quicklime is adjusted to enable the alkalinity of the lower sintered material to be 1.9-2.1;
the upper layer sintering material is prepared by uniformly mixing and granulating iron ore powder, upper layer pretreatment fuel, limestone and quicklime, wherein the mass fraction of the iron ore powder is 81-86%, the mass fraction of the upper layer pretreatment fuel is 4-8%, the mass fraction of the quicklime is 3-7%, and the content of the limestone is adjusted to enable the alkalinity of the upper layer sintering mixture to be 2.1-2.3;
(3) Firing and sintering cloth: the lower sintered material is distributed and added to the bottom of the trolley by a first distributing device 1 to form a lower material layer 4; the upper sintering material is distributed and added on the lower sintering material surface by a second distributing device 2 to form an upper material layer 5; the total height of the upper and lower material layers is 850-1050 mm, wherein the height of the lower material layer 4 is the total height of the material layersThe sintering material is ignited by an ignition system 3, and ventilation sintering is started;
(4) And (3) sintering flue gas circulation: the flue gas at the front part of the sintering machine is mixed with the waste gas at the middle temperature section of the circular cooler through a flue gas circulation system to form final circulation flue gas, and the final circulation flue gas returns to the rear sintering material surface of the sintering machine; the flue gas at the rear part of the sintering machine is directly discharged after being treated by a flue gas discharge purification system; the front flue gas of the sintering machine is discharged by a front air box, and corresponds to the waste gas generated by the front sintering material, wherein the number of the front air boxes is the total number of the air boxes of the sintering machineThe rear flue gas of the sintering machine is discharged from a rear air box and corresponds to the waste gas generated by rear sintering materials, wherein the number of the rear air boxes is +.>
As a preferable embodiment, the desulfurization ash is waste generated by sintering flue gas semi-dry desulfurization; the activated carbon powder is waste generated by the sintering flue gas activated carbon desulfurization and denitrification system 20.
As a preferred embodiment, the biomass carbon powder is a solid fuel generated by thermochemical reaction of biomass under anaerobic or anoxic conditions, and the mass fraction of the fixed carbon is 70% -80%.
In a preferred embodiment, the final circulating flue gas has a temperature of 200 ℃ to 280 ℃ and an oxygen concentration of 19% or more.
As shown in fig. 2, the invention also provides a device system for realizing the sintering production method of the back-mixed sintering flue gas desulfurization ash, which comprises a sintering machine, a material distribution system, an ignition system 3, an air draft system, a discharging and crushing device 23 and a circular cooler;
the material distribution system comprises a first material distribution device 1 and a second material distribution device 2, wherein the first material distribution device 1 is arranged in front, and the second material distribution device 2 is arranged in back; wherein the first material distributing device 1 adds lower-layer sintering materials to the sintering machine cloth, and the second material distributing device 2 adds upper-layer sintering materials to the sintering machine cloth;
the exhaust system comprises a smoke circulation system and a smoke discharge purification system; the flue gas circulation system comprises a front air box system 8, a front air box flue 6, a first dust remover 11, a circulation drainage fan 12, a flue gas dehumidifying mixer 13, a circulation flue gas main pipeline 15, a circulation booster fan 16 and a circulation flue gas sealing cover 17; the front bellows system 8 is positioned below the sintering pallet and comprises a plurality of front bellows which are connected with the front bellows flue 6; the front bellows flue 6, the first dust remover 11, the circulating drainage fan 12 and the flue gas dehumidification mixer 13 are connected in sequence through a flue gas pipeline 10; the medium-temperature flue gas heat preservation cover 14 of the annular cooler is connected with the flue gas dehumidifying mixer 13 through a circulating flue gas pipeline; the smoke dehumidifying mixer 13, the circulating booster fan 16 and the circulating smoke sealing cover 17 are sequentially connected through the circulating smoke main pipeline 15; the circulating smoke seal cover 17 is arranged at the upper part of the rear sintering material surface;
the flue gas discharge purification system comprises a rear air box system 9, a rear air box flue 7, a second dust remover 18, a flue gas discharge fan 19, an activated carbon desulfurization and denitrification system 20, a sulfur and nitrogen pollutant detector 21 and an outer flue gas discharge chimney 22; the rear bellows system 9 comprises a plurality of rear bellows, each connected to the rear bellows stack 7; the rear air box flue 7, the second dust remover 18, the flue gas external exhaust fan 19, the active carbon desulfurization and denitrification system 20 and the external exhaust chimney 22 are connected through the flue gas pipeline 10; the sulfur and nitrogen pollutant detector 21 is arranged between the active carbon desulfurization and denitrification system 20 and the outer smoke exhaust chimney 22.
Example 1
A method for producing sintered flue gas desulfurization ash by back-mixing sintering comprises the steps of preprocessing lower-layer fuel, and forming the lower-layer fuel by coke powder and biomass carbon powder; the lower-layer fuel is taken as a balling core, the desulfurized fly ash is taken as adhesive powder, and ethanolamine aqueous solution is sprayed for pelletization to obtain the lower-layer pretreated fuel, wherein the mass fraction of coke powder is 40%, the mass fraction of biomass carbon powder is 35%, the mass fraction of desulfurized fly ash is 22%, and the mass fraction of ethanolamine is 3%. Pretreating the upper layer fuel, wherein coke powder and activated carbon powder form the upper layer fuel; the upper layer fuel is taken as a balling core, active carbon powder added with quicklime slaking solution is taken as adhesive powder, ethanolamine aqueous solution is sprayed for pelletization to obtain the upper layer pretreatment fuel, wherein the mass fraction of the coke powder is 70%, the mass fraction of the active carbon powder is 20%, the mass fraction of the quicklime is 8%, and the mass fraction of the ethanolamine is 2%. The desulfurization ash is waste generated by sintering flue gas semi-dry desulfurization; the activated carbon powder is waste generated by the sintering flue gas activated carbon desulfurization and denitrification system 20; the biomass carbon powder is solid fuel generated by biomass through thermochemical reaction under anaerobic or anoxic conditions, and the mass fraction of the fixed carbon is 73%.
The lower sintered material is prepared by uniformly mixing and granulating iron ore powder, lower pretreated fuel, desulfurized ash and quicklime, wherein the mass fraction of the iron ore powder is 82%, the mass fraction of the lower pretreated fuel is 8%, the mass fraction of the quicklime is 5%, the mass fraction of the desulfurized ash is 5%, and the alkalinity of the lower sintered material is 2.1. The upper layer sintered material is prepared by uniformly mixing and granulating iron ore powder, upper layer pretreatment fuel, limestone and quicklime, wherein the mass fraction of the iron ore powder is 82%, the mass fraction of the upper layer pretreatment fuel is 7%, the mass fraction of the quicklime is 5%, and the mass fraction of the limestone is 6%, so that the alkalinity of the upper layer sintered material is 2.3. The lower sintered material is distributed and added to the bottom of the trolley by a first distributing device 1 to form a lower material layer 4; the upper sintering material is distributed and added on the lower sintering material surface by a second distributing device 2 to form an upper material layer 5; the total height of the upper and lower material layers is 900mm, wherein the height of the lower material layer 4 is the total height of the material layersI.e. 600mm; the sintered material is ignited by the ignition system 3, and ventilation sintering is started.
The flue gas at the front part of the sintering machine is mixed with the waste gas at the middle temperature section of the circular cooler through a flue gas circulation system to form final circulation flue gas, and the final circulation flue gas returns to the rear sintering material surface of the sintering machine; the flue gas at the rear part of the sintering machine is directly discharged after being treated by a flue gas discharge purification system; the final circulating flue gas temperature was 220 ℃ and the oxygen concentration was 20%.
The front flue gas of the sintering machine is discharged by front bellows, and corresponds to the waste gas generated by the front sintering material, wherein the number of the front bellows is the total number of the bellows of the sintering machineThe back flue gas of the sintering machine is discharged from a back air box and corresponds to the waste gas generated by the back sintering material, wherein the number of the back air box is +.>
An equipment system for realizing a sintering production method by matching sintered flue gas desulfurization ash comprises a sintering machine, a material distribution system, an ignition system 3, an air draft system, a discharging and crushing device 23 and a circular cooler. The material distribution system comprises a first material distribution device 1 and a second material distribution device 2, wherein the first material distribution device 1 is arranged in front, and the second material distribution device 2 is arranged in back; wherein the first distributing device 1 adds lower-layer sintering materials to the sintering machine cloth, and the second distributing device 2 adds upper-layer sintering materials to the sintering machine cloth.
The exhaust system comprises a smoke circulation system and a smoke discharge purification system; the flue gas circulation system comprises a front air box system 8, a front air box flue 6, a first dust remover 11, a circulation drainage fan 12, a flue gas dehumidifying mixer 13, a circulation flue gas main pipeline 15, a circulation booster fan 16 and a circulation flue gas sealing cover 17; the front bellows system 8 is positioned below the sintering pallet and comprises a plurality of front bellows which are connected with the front bellows flue 6; the front bellows flue 6, the first dust remover 11, the circulating drainage fan 12 and the flue gas dehumidification mixer 13 are connected in sequence through a flue gas pipeline 10; medium-temperature smoke heat-insulating cover 14 of circular cooler passes through circulating smokeThe gas pipeline is connected with a flue gas dehumidifying mixer 13; the smoke dehumidifying mixer 13, the circulating booster fan 16 and the circulating smoke sealing cover 17 are sequentially connected through the circulating smoke main pipeline 15; the circulating smoke seal cover 17 is arranged at the upper part of the rear sintering material surface. The flue gas external discharge purification system comprises a rear air box system 9, a rear air box flue 7, a second dust remover 18, a flue gas external exhaust fan 19, an active carbon desulfurization and denitrification system 20, a sulfur and nitrogen pollutant detector 21 and an external exhaust chimney 22; the rear bellows system 9 comprises a plurality of rear bellows, each connected to the rear bellows stack 7; the rear air box flue 7, the second dust remover 18, the flue gas external exhaust fan 19, the active carbon desulfurization and denitrification system 20 and the external exhaust chimney 22 are connected through the flue gas pipeline 10; the sulfur and nitrogen pollutant detector 21 is arranged between the active carbon desulfurization and denitrification system 20 and the outer smoke exhaust chimney 22. The front bellows flue 6 refers to the total number of bellows positioned at the front part of the sintering machineA flue corresponding to the bellows system; the rear bellows flue 7 is the total number of bellows at the rear part of the sintering machine>A flue corresponding to the bellows system.
After the invention is adopted, the sintering flue gas semi-dry desulfurization ash and the active carbon method desulfurization and denitrification waste active carbon ash are subjected to back-mixing sintering production, and the sintering utilization coefficient is 1.408t/m 2 H is increased to 1.479t/m 2 H, reducing the solid burnup from 44.2kg/t to 39.4kg/t; the drum strength of the sinter is improved from 80.4 percent to 85.3 percent; the emission of sintering flue gas is reduced by 30-35%, SO 2 And NO x Meets the emission standard.
Example 2
A method for producing sintered flue gas desulfurization ash by back-mixing sintering comprises the steps of preprocessing lower-layer fuel, and forming the lower-layer fuel by coke powder and biomass carbon powder; the lower-layer fuel is taken as a balling core, the desulfurized ash is taken as adhesive powder, and ethanolamine aqueous solution is sprayed for pelletization to obtain the lower-layer pretreated fuel, wherein the mass fraction of coke powder is 43%, the mass fraction of biomass carbon powder is 30%, the mass fraction of desulfurized ash is 25%, and the mass fraction of ethanolamine is 2%. Pretreating the upper layer fuel, wherein coke powder and activated carbon powder form the upper layer fuel; the upper layer fuel is taken as a balling core, active carbon powder added with quicklime slaking solution is taken as adhesive powder, ethanolamine aqueous solution is sprayed for pelletization to obtain the upper layer pretreatment fuel, wherein the mass fraction of the coke powder is 67%, the mass fraction of the active carbon powder is 24.5%, the mass fraction of the quicklime is 7%, and the mass fraction of the ethanolamine is 1.5%. The desulfurization ash is waste generated by sintering flue gas semi-dry desulfurization; the activated carbon powder is waste generated by the sintering flue gas activated carbon desulfurization and denitrification system 20; the biomass carbon powder is solid fuel generated by biomass through thermochemical reaction under anaerobic or anoxic conditions, and the mass fraction of the fixed carbon is 78%.
The lower sintered material is prepared by uniformly mixing and granulating iron ore powder, lower pretreated fuel, desulfurized ash and quicklime, wherein the mass fraction of the iron ore powder is 81%, the mass fraction of the lower pretreated fuel is 7%, the mass fraction of the quicklime is 5%, the mass fraction of the desulfurized ash is 7%, and the alkalinity of the lower sintered material is 1.9. The upper layer sintered material is prepared by uniformly mixing and granulating iron ore powder, upper layer pretreatment fuel, limestone and quicklime, wherein the mass fraction of the iron ore powder is 83%, the mass fraction of the upper layer pretreatment fuel is 7%, the mass fraction of the quicklime is 6%, and the mass fraction of the limestone is 4%, so that the alkalinity of the upper layer sintered material is 2.2. The lower sintered material is distributed and added to the bottom of the trolley by a first distributing device 1 to form a lower material layer 4; the upper sintering material is distributed and added on the lower sintering material surface by a second distributing device 2 to form an upper material layer 5; the total height of the upper and lower material layers is 1000mm, wherein the height of the lower material layer 4 is the total height of the material layersI.e. 500mm; the sintering mixture is ignited by the ignition system 3, and ventilation sintering is started.
The flue gas at the front part of the sintering machine is mixed with the waste gas at the middle temperature section of the circular cooler through a flue gas circulation system to form final circulation flue gas, and the final circulation flue gas returns to the rear sintering material surface of the sintering machine; the flue gas at the rear part of the sintering machine is directly discharged after being treated by a flue gas discharge purification system; the final circulating flue gas temperature was 260 ℃ and the oxygen concentration was 21%.
The front flue gas of the sintering machine is discharged by front bellows, and corresponds to the waste gas generated by the front sintering material, wherein the number of the front bellows is the total number of the bellows of the sintering machineThe back flue gas of the sintering machine is discharged from a back air box and corresponds to the waste gas generated by the back sintering material, wherein the number of the back air box is +.>
An equipment system for realizing a sintering production method by matching sintered flue gas desulfurization ash comprises a sintering machine, a material distribution system, an ignition system 3, an air draft system, a discharging and crushing device 23 and a circular cooler. The material distribution system comprises a first material distribution device 1 and a second material distribution device 2, wherein the first material distribution device 1 is arranged in front, and the second material distribution device 2 is arranged in back; wherein the first distributing device 1 adds lower-layer sintering materials to the sintering machine cloth, and the second distributing device 2 adds upper-layer sintering materials to the sintering machine cloth.
The exhaust system comprises a smoke circulation system and a smoke discharge purification system; the flue gas circulation system comprises a front air box system 8, a front air box flue 6, a first dust remover 11, a circulation drainage fan 12, a flue gas dehumidifying mixer 13, a circulation flue gas main pipeline 15, a circulation booster fan 16 and a circulation flue gas sealing cover 17; the front bellows system 8 is positioned below the sintering pallet and comprises a plurality of front bellows which are connected with the front bellows flue 6; the front bellows flue 6, the first dust remover 11, the circulating drainage fan 12 and the flue gas dehumidification mixer 13 are connected in sequence through a flue gas pipeline 10; the medium-temperature flue gas heat preservation cover 14 of the annular cooler is connected with the flue gas dehumidifying mixer 13 through a circulating flue gas pipeline; the smoke dehumidifying mixer 13, the circulating booster fan 16 and the circulating smoke sealing cover 17 are sequentially connected through the circulating smoke main pipeline 15; the circulating smoke seal cover 17 is arranged at the upper part of the rear sintering material surface. The flue gas external discharge purification system comprises a rear air box system 9, a rear air box flue 7, a second dust remover 18, a flue gas external exhaust fan 19, an active carbon desulfurization and denitrification system 20, a sulfur and nitrogen pollutant detector 21 and an external exhaust chimney 22; the rear bellows system 9 comprises a plurality of rear portionsThe bellows are connected with the rear bellows flue 7; the rear air box flue 7, the second dust remover 18, the flue gas external exhaust fan 19, the active carbon desulfurization and denitrification system 20 and the external exhaust chimney 22 are connected through the flue gas pipeline 10; the sulfur and nitrogen pollutant detector 21 is arranged between the active carbon desulfurization and denitrification system 20 and the outer smoke exhaust chimney 22. The front bellows flue 6 refers to the total number of bellows positioned at the front part of the sintering machineA flue corresponding to the bellows system; the rear bellows flue 7 is the total number of bellows at the rear part of the sintering machine>A flue corresponding to the bellows system.
After the invention is adopted, the sintering flue gas semi-dry desulfurization ash and the active carbon method desulfurization and denitrification waste active carbon ash are subjected to back-mixing sintering production, and the sintering utilization coefficient is 1.405t/m 2 H is increased to 1.509t/m 2 H, reducing the solid burnup from 45.6kg/t to 39.8kg/t; the drum strength of the sinter is improved from 79.8 percent to 84.5 percent; the emission of sintering flue gas is reduced by 40-45%, SO 2 And NO x Meets the emission standard.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims (10)

1.一种烧结烟气脱硫灰回配烧结生产的方法，其特征在于，包括如下步骤：1. A method for producing sintered flue gas desulfurization ash by recycling it into sintering processes, characterized by comprising the following steps: S1、对燃料进行预处理；S1. Pre-treat the fuel; S11、将焦粉、生物质炭粉、脱硫灰和乙醇胺水溶液进行制粒获得下层预处理燃料；S11. Pelletize coke powder, biomass char powder, desulfurization ash and ethanolamine aqueous solution to obtain lower layer pretreated fuel. S12、将焦粉、活性炭粉、配加生石灰消化液的活性炭粉和乙醇胺水溶液进行制粒获得上层预处理燃料；S12. Granulate coke powder, activated carbon powder, activated carbon powder mixed with quicklime digestion solution and ethanolamine aqueous solution to obtain upper pretreated fuel. S2、制备烧结料；S2. Preparation of sintering material; S21、将铁矿粉、下层预处理燃料、脱硫灰和生石灰混匀制粒得到下层烧结料；S21. Iron ore powder, lower layer pretreated fuel, desulfurization ash and quicklime are mixed and granulated to obtain lower layer sintering material; S22、将铁矿粉、上层预处理燃料、石灰石和生石灰混匀制粒得到上层烧结料；S22. Iron ore powder, upper pretreated fuel, limestone and quicklime are mixed and granulated to obtain upper sintering material; S3、布料点火烧结；S3, Fabric ignition and sintering; S31、通过第一布料装置(1)将下层烧结料布加到台车底部，形成下部料层(4)；通过第二布料装置(2)将上层烧结料布加到下层烧结料面上，形成上部料层(5)；S31. The lower sintering material is added to the bottom of the trolley by the first material feeding device (1) to form the lower material layer (4); the upper sintering material is added to the surface of the lower sintering material by the second material feeding device (2) to form the upper material layer (5). S32、上下层烧结料由点火系统(3)点火，开始抽风烧结；S32. The upper and lower sintering materials are ignited by the ignition system (3) and the sintering begins with exhaust ventilation. S4、烧结烟气循环：烧结过程中，烧结机前部烟气通过烟气循环系统与环冷机中温段废气混合形成最终循环烟气，返回烧结机后部烧结料面；烧结机后部烟气经过烟气外排净化系统处理后直接排出；烧结机前部烟气由前部风箱排出，对应前部烧结料产生的废气；烧结机后部烟气由后部风箱排出，对应后部烧结料产生的废气。S4. Sintering Flue Gas Circulation: During the sintering process, the flue gas at the front of the sintering machine is mixed with the waste gas in the intermediate temperature section of the annular cooler through the flue gas circulation system to form the final circulating flue gas, which returns to the sintering material surface at the rear of the sintering machine; the flue gas at the rear of the sintering machine is directly discharged after being treated by the flue gas exhaust purification system; the flue gas at the front of the sintering machine is discharged from the front air box, corresponding to the waste gas generated by the front sintering material; the flue gas at the rear of the sintering machine is discharged from the rear air box, corresponding to the waste gas generated by the rear sintering material. 2.根据权利要求1所述的烧结烟气脱硫灰回配烧结生产的方法，其特征在于，所述步骤S11的具体步骤为：将焦粉和生物质炭粉组成下层燃料；以下层燃料为成球核心，脱硫灰为粘附粉，喷洒乙醇胺水溶液进行制粒获得下层预处理燃料；2. The method for sintering flue gas desulfurization ash recycling and sintering production according to claim 1, characterized in that the specific steps of step S11 are: forming a lower layer fuel by combining coke powder and biomass char powder; using the lower layer fuel as the pelletizing core and desulfurization ash as the adhesive powder, spraying an aqueous ethanolamine solution to granulate and obtain the lower layer pretreated fuel; 所述下层预处理燃料中，焦粉质量分数为40％～45％，生物质炭粉质量分数为30％～35％，脱硫灰质量分数为20％～25％，乙醇胺质量分数为2％～4％。In the lower-layer pretreated fuel, the mass fraction of coke powder is 40%–45%, the mass fraction of biomass char powder is 30%–35%, the mass fraction of desulfurization ash is 20%–25%, and the mass fraction of ethanolamine is 2%–4%. 3.根据权利要求1所述的烧结烟气脱硫灰回配烧结生产的方法，其特征在于，所述步骤S12的具体步骤为：将焦粉和活性炭粉组成上层燃料；以上层燃料为成球核心，配加生石灰消化液的活性炭粉为粘附粉，喷洒乙醇胺水溶液进行制粒获得上层预处理燃料；3. The method for producing desulfurized ash from sintering flue gas by re-mixing sintering according to claim 1, characterized in that the specific steps of step S12 are as follows: coke powder and activated carbon powder are used to form upper layer fuel; the upper layer fuel is used as the core for pelletizing, activated carbon powder with quicklime digestion solution is added as the adhesive powder, and ethanolamine aqueous solution is sprayed to granulate and obtain upper layer pretreated fuel. 所述上层预处理燃料中，焦粉质量分数为65％～70％，活性炭粉质量分数为20％～25％，生石灰质量分数为5％～10％，乙醇胺质量分数为0.5％～2.5％。In the upper pretreated fuel, the mass fraction of coke powder is 65%–70%, the mass fraction of activated carbon powder is 20%–25%, the mass fraction of quicklime is 5%–10%, and the mass fraction of ethanolamine is 0.5%–2.5%. 4.根据权利要求1所述的烧结烟气脱硫灰回配烧结生产的方法，其特征在于，所述下层烧结料中，铁矿粉质量分数为80％～85％，下层预处理燃料质量分数为6％～10％，脱硫灰质量分数为5％～8％，调整生石灰质量分数使下层烧结料碱度为1.9～2.1；4. The method for sintering production using desulfurized ash recycled from sintering flue gas according to claim 1, characterized in that, in the lower layer sintering material, the mass fraction of iron ore powder is 80% to 85%, the mass fraction of lower layer pretreated fuel is 6% to 10%, the mass fraction of desulfurized ash is 5% to 8%, and the mass fraction of quicklime is adjusted to make the basicity of the lower layer sintering material 1.9 to 2.1; 所述上层烧结料中，铁矿粉的质量分数为81％～86％，上层预处理燃料质量分数为4％～8％，生石灰质量分数为3％～7％，调整石灰石质量分数使上层烧结料的碱度为2.1～2.3。In the upper sintering material, the mass fraction of iron ore powder is 81% to 86%, the mass fraction of upper pretreated fuel is 4% to 8%, the mass fraction of quicklime is 3% to 7%, and the mass fraction of limestone is adjusted so that the basicity of the upper sintering material is 2.1 to 2.3. 5.根据权利要求1所述的烧结烟气脱硫灰回配烧结生产的方法，其特征在于，所述步骤S31中，上部料层(5)和下部料层(4)的总高度为850mm～1050mm，其中下部料层(4)高度为料层总高度的 5. The method for producing sintered flue gas desulfurization ash by re-mixing according to claim 1, characterized in that, in step S31, the total height of the upper material layer (5) and the lower material layer (4) is 850mm to 1050mm, wherein the height of the lower material layer (4) is 1/3 of the total height of the material layers. 6.根据权利要求1所述的烧结烟气脱硫灰回配烧结生产的方法，其特征在于，所述步骤S4中，前部风箱个数为烧结机风箱总个数的后部风箱个数为烧结机风箱总个数的 6. The method for sintering flue gas desulfurization ash recycling and sintering production according to claim 1, characterized in that, in step S4, the number of front air boxes is [amount missing] of the total number of air boxes in the sintering machine. The number of rear air boxes is equal to the total number of air boxes in the sintering machine. 7.根据权利要求1或6所述的烧结烟气脱硫灰回配烧结生产的方法，其特征在于，所述步骤S4中，最终循环烟气的温度为200℃～280℃，氧气浓度为大于等于19％。7. The method for sintering flue gas desulfurization ash recycling and sintering production according to claim 1 or 6, characterized in that, in step S4, the temperature of the final circulating flue gas is 200℃～280℃, and the oxygen concentration is greater than or equal to 19%. 8.根据权利要求1、2或4所述的烧结烟气脱硫灰回配烧结生产的方法，其特征在于，所述脱硫灰为烧结烟气半干法脱硫产生的废弃物；所述生物质炭粉是由生物质在无氧或缺氧条件下经热化学反应生成的固体燃料，其固定碳质量分数为70％～80％。8. The method for re-blending sintering production with desulfurized ash from sintering flue gas according to claim 1, 2 or 4, characterized in that the desulfurized ash is waste generated from semi-dry desulfurization of sintering flue gas; and the biomass charcoal powder is a solid fuel generated by thermochemical reaction of biomass under anaerobic or hypoxic conditions, with a fixed carbon mass fraction of 70% to 80%. 9.根据权利要求1或3所述的烧结烟气脱硫灰回配烧结生产的方法，其特征在于，所述活性炭粉为烧结烟气活性炭脱硫脱硝系统(20)产生的废弃物。9. The method for sintering flue gas desulfurization ash recycling and sintering production according to claim 1 or 3, characterized in that the activated carbon powder is a waste product generated by the sintering flue gas activated carbon desulfurization and denitrification system (20). 10.一种实现如权利要求1-9任意一项权利要求所述的烧结烟气脱硫灰回配烧结生产的方法的设备系统，其特征在于，包括：烧结机、布料系统、点火系统(3)、抽风系统、卸料破碎装置(23)和环冷机；所述布料系统包括第一布料装置(1)和位于第一布料装置(1)后方的第二布料装置(2)，所述第一布料装置(1)用于向烧结机布加下层烧结料，所述第二布料装置(2)用于向烧结机布加上层烧结料；10. An equipment system for implementing the method of sintering flue gas desulfurization ash recycling and sintering production as described in any one of claims 1-9, characterized in that it comprises: a sintering machine, a feeding system, an ignition system (3), an exhaust system, a discharge crushing device (23), and an annular cooler; the feeding system comprises a first feeding device (1) and a second feeding device (2) located behind the first feeding device (1), the first feeding device (1) being used to feed the lower layer of sintering material to the sintering machine, and the second feeding device (2) being used to feed the upper layer of sintering material to the sintering machine; 所述抽风系统包括烟气循环系统和烟气外排净化系统，所述烟气循环系统包括前部风箱系统(8)、前部风箱烟道(6)、第一除尘器(11)、循环引流风机(12)、烟气除湿混合器(13)、循环烟气主管道(15)、循环增压风机(16)和循环烟气密封罩(17)，所述环冷机包括中温烟气保温罩(14)；所述前部风箱系统(8)位于烧结台车下面，包括多个前部风箱，均与前部风箱烟道(6)连接；所述前部风箱烟道(6)、第一除尘器(11)、循环引流风机(12)和烟气除湿混合器(13)通过烟气管道(10)依次连接，所述中温烟气保温罩(14)通过循环烟气管道与烟气除湿混合器(13)连接；所述烟气除湿混合器(13)、循环增压风机(16)和循环烟气密封罩(17)通过循环烟气主管道(15)依次连接，所述循环烟气密封罩(17)设置于后部烧结料面上部；The exhaust system includes a flue gas circulation system and a flue gas exhaust purification system. The flue gas circulation system includes a front air box system (8), a front air box flue (6), a first dust collector (11), a circulating induced draft fan (12), a flue gas dehumidification mixer (13), a circulating flue gas main pipeline (15), a circulating booster fan (16), and a circulating flue gas sealing cover (17). The annular cooler includes a medium-temperature flue gas insulation cover (14). The front air box system (8) is located below the sintering trolley and includes multiple front air boxes, all connected to the front air box flue ( 6) Connection; The front air box flue (6), the first dust collector (11), the circulating induced flow fan (12) and the flue gas dehumidification mixer (13) are connected in sequence through the flue gas pipe (10), and the medium temperature flue gas insulation cover (14) is connected to the flue gas dehumidification mixer (13) through the circulating flue gas pipe; The flue gas dehumidification mixer (13), the circulating booster fan (16) and the circulating flue gas sealing cover (17) are connected in sequence through the circulating flue gas main pipe (15), and the circulating flue gas sealing cover (17) is set on the upper part of the rear sintering material surface; 所述烟气外排净化系统包括后部风箱系统(9)、后部风箱烟道(7)、第二除尘器(18)、烟气外排风机(19)、活性炭脱硫脱硝系统(20)、硫氮污染物检测仪(21)和外排烟囱(22)，所述后部风箱系统(9)包括多个后部风箱，均与后部风箱烟道(7)连接；所述后部风箱烟道(7)、第二除尘器(18)、烟气外排风机(19)、活性炭脱硫脱硝系统(20)和外排烟囱(22)通过烟气管道(10)依次连接，所述硫氮污染物检测仪(21)设置于活性炭脱硫脱硝系统(20)和外排烟囱(22)之间。The flue gas exhaust purification system includes a rear air box system (9), a rear air box flue (7), a second dust collector (18), a flue gas exhaust fan (19), an activated carbon desulfurization and denitrification system (20), a sulfur and nitrogen pollutant detector (21), and an exhaust chimney (22). The rear air box system (9) includes multiple rear air boxes, all of which are connected to the rear air box flue (7). The rear air box flue (7), the second dust collector (18), the flue gas exhaust fan (19), the activated carbon desulfurization and denitrification system (20), and the exhaust chimney (22) are connected in sequence through a flue gas pipe (10). The sulfur and nitrogen pollutant detector (21) is located between the activated carbon desulfurization and denitrification system (20) and the exhaust chimney (22).
CN202310458988.5A 2023-04-25 2023-04-25 Method and equipment system for sintering production of sintered flue gas desulfurization ash by matching Pending CN116607006A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310458988.5A CN116607006A (en) 2023-04-25 2023-04-25 Method and equipment system for sintering production of sintered flue gas desulfurization ash by matching

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310458988.5A CN116607006A (en) 2023-04-25 2023-04-25 Method and equipment system for sintering production of sintered flue gas desulfurization ash by matching

Publications (1)

Publication Number Publication Date
CN116607006A true CN116607006A (en) 2023-08-18

Family

ID=87675539

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310458988.5A Pending CN116607006A (en) 2023-04-25 2023-04-25 Method and equipment system for sintering production of sintered flue gas desulfurization ash by matching

Country Status (1)

Country Link
CN (1) CN116607006A (en)

Similar Documents

Publication Publication Date Title
CN102206091B (en) Method for making ceramsite by using sludge
JP2021515844A (en) Microwave sintering method of iron ore
CN113751476B (en) A method for co-processing and recycling of metallurgical solid waste and municipal waste incineration fly ash
CN101851071A (en) Method for fixing carbon dioxide and digesting free calcium oxide in slag micro powder
CN111254277A (en) Method for recycling ore blending of pellet waste desulfurization ash through back sintering
CN110404936B (en) A kind of comprehensive treatment method of semi-dry desulfurization ash
CN105819644B (en) A kind of oily sludge innocuity disposal system and method
CN101775325B (en) Coal composite sulfur fixing agent
CN110513693B (en) Sludge incineration method
CN110817925A (en) Method for resource utilization of desulfurized fly ash
CN109569183B (en) Comprehensive circulation treatment method and treatment device for flue gas of double-series sintering system
CN115805008A (en) Iron-calcium-containing flue gas desulfurizer and preparation method thereof
Zhang et al. Sulfur migration behavior in sintering and pelletizing processes: A review
KR101954372B1 (en) Manufacturing Method of Fuel Solid Comprising Organic Waste
CN102732670A (en) Recycling method for treating iron-bearing dust by utilizing carbonation process
CN217351485U (en) System for utilize rotary hearth furnace to deal with waste incineration flying ash in coordination
CN116607006A (en) Method and equipment system for sintering production of sintered flue gas desulfurization ash by matching
CN105537246A (en) Resource utilization method and system for organic solid waste
CN104776727A (en) Efficient purifying method for exhausted tail gases from firing of gangue baked bricks in portable tunnel kiln
CN116253348B (en) A method for preparing calcium oxide based on industrial by-product gypsum
CN101891407A (en) A kind of vibration fluidization decomposition method of phosphogypsum
CN216039746U (en) System for preparing V2O5 pellets from desulfurized fly ash and vanadium titano-magnetite
CN115789681A (en) Method, system and application for preparing solid oxygen carrier from sintering flue gas semi-dry desulfurization ash
CN117019832A (en) Method, device and system for cooperatively disposing solid waste by gasified slag
CN114752720A (en) Hydrogen-rich thermal reduction blowing gas, preparation method thereof and application thereof in blast furnace iron making

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination