CN111171878A - Pulverized coal gasification production method, pulverized coal gasification process production line and burner thereof - Google Patents
Pulverized coal gasification production method, pulverized coal gasification process production line and burner thereof Download PDFInfo
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- CN111171878A CN111171878A CN202010116916.9A CN202010116916A CN111171878A CN 111171878 A CN111171878 A CN 111171878A CN 202010116916 A CN202010116916 A CN 202010116916A CN 111171878 A CN111171878 A CN 111171878A
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- pulverized coal
- coal gasification
- gasification process
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- cooling
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/48—Apparatus; Plants
- C10J3/50—Fuel charging devices
- C10J3/506—Fuel charging devices for entrained flow gasifiers
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2200/00—Details of gasification apparatus
- C10J2200/15—Details of feeding means
- C10J2200/152—Nozzles or lances for introducing gas, liquids or suspensions
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
Abstract
本发明公开了一种粉煤气化工艺烧嘴，包括具有入口端和喷出端的烧嘴本体；烧嘴本体的煤粉通道和氧通道在入口端和喷出端之间同向延伸且内外套设，氧通道的外周缠绕有冷却管；冷却管末端的多个喷射孔紧邻喷出端设置，全部喷射孔以煤粉通道的轴线为中心旋转分布且均朝向煤粉通道倾斜。本发明公开了一种粉煤气化工艺生产线，包括上述粉煤气化工艺烧嘴。本发明还公开了一种粉煤气化生产方法。该粉煤气化工艺烧嘴利用冷却管中的介质水既作为冷却工质，又作为工艺物料即气化后形成水蒸气，简化了现有烧嘴的多管腔结构，降低了加工难度；水蒸气从喷射孔喷出，以煤粉通道的轴向为中心向内旋转喷射，进而有利于煤粉的旋流弥散。
The invention discloses a pulverized coal gasification process burner, which comprises a burner body with an inlet end and an ejection end; the pulverized coal channel and the oxygen channel of the burner body extend in the same direction between the inlet end and the ejection end, and have an inner jacket. A cooling pipe is wound around the outer circumference of the oxygen channel; a plurality of injection holes at the end of the cooling pipe are arranged close to the injection end, and all injection holes are rotated and distributed around the axis of the pulverized coal channel and are inclined toward the pulverized coal channel. The invention discloses a pulverized coal gasification process production line, comprising the above-mentioned pulverized coal gasification process burner. The invention also discloses a pulverized coal gasification production method. The pulverized coal gasification process burner uses the medium water in the cooling pipe as both the cooling medium and the process material, that is, water vapor is formed after gasification, which simplifies the multi-cavity structure of the existing burner and reduces the processing difficulty; The steam is ejected from the injection hole, and is rotated and injected inward with the axial direction of the pulverized coal channel as the center, which is conducive to the swirl dispersion of the pulverized coal.
Description
Technical Field
The invention relates to the field of coal gasification, in particular to a burner for a pulverized coal gasification process. The invention also relates to a pulverized coal gasification process production line which comprises the pulverized coal gasification process burner. Also relates to a production method of the pulverized coal gasification process.
Background
The coal gasification process burner is divided into a coal water slurry process burner and a pulverized coal process burner according to different raw material states, wherein the pulverized coal process burner is represented by a shell, a GSP (ground gas pressure) burner and an aerospace furnace pulverized coal nozzle. Because the various pulverized coal process burners are complex in structure and high in processing difficulty, for example, the cooling jacket adopted by the shell has large inside and outside temperature difference and frequent alternation, thermal stress fatigue is increased, cracks are easy to appear, and the GSP and the pulverized coal nozzles of the space furnaces are complex in structure and high in processing difficulty, so that the using effect of the pulverized coal process burners is difficult to ensure and maintain.
In summary, how to ensure the cooling effect and simplify the burner structure becomes a problem to be solved urgently by those skilled in the art.
Disclosure of Invention
The invention aims to provide a pulverized coal gasification process burner which is simple in structure, convenient to process and maintain and good in cooling effect and pulverized coal dispersion effect. Another object of the present invention is to provide a pulverized coal gasification process production line comprising the above pulverized coal gasification process burner. The invention also aims to provide a production method of the pulverized coal gasification process.
In order to achieve the aim, the invention provides a pulverized coal gasification process burner which comprises a burner body, a burner body and a burner nozzle, wherein the burner body is provided with an inlet end and an ejection end; the pulverized coal channel and the oxygen channel of the burner body extend in the same direction between the inlet end and the ejection end and are sleeved with the inlet and the outlet, and a cooling pipe is wound on the periphery of the oxygen channel; and a plurality of injection holes at the tail end of the cooling pipe are arranged close to the ejection end, and all the injection holes are rotationally distributed by taking the axis of the pulverized coal channel as the center and incline towards the pulverized coal channel.
Preferably, the cooling pipe comprises a gas injection ring pipe arranged around the plane of the ejection end; the tail end of the air injection ring pipe is provided with a plurality of injection holes.
Preferably, the cooling pipe further comprises a water cooling pipe spirally wound around the outer periphery of the oxygen passage; the air injection ring pipe is connected to the tail end of the water cooling pipe.
Preferably, the cross section of the air injection ring pipe is a semicircular hole, and all the injection holes are arranged on the flat bottom surface of the air injection ring pipe.
Preferably, all of the injection holes are arranged at equal intervals.
Preferably, the included angle between the axis of any injection hole and the axis of the pulverized coal channel is not more than 20 degrees.
Preferably, the diameter of any one of the injection holes is set to be 2-5 mm.
The invention also provides a pulverized coal gasification process production line, which comprises a gasification furnace and the pulverized coal gasification process burner; and the ejection end of the pulverized coal gasification process burner is arranged in the gasification furnace.
Preferably, the cooling pipe is connected to a steam device for supplying steam when the furnace temperature in the gasification furnace is lower than a preset temperature, and is connected to a cooling water device for supplying cooling water when the furnace temperature in the gasification furnace is higher than or equal to the preset temperature.
The invention also provides a pulverized coal gasification production method, which comprises the following steps:
detecting the furnace temperature in the gasification furnace;
and introducing steam and cooling water into a cooling pipe of a pulverized coal gasification process burner connected to the gasification furnace according to the furnace temperature.
In contrast to the background art described above, the present invention provides a pulverized coal gasification process burner that includes a burner body having an inlet end and an outlet end. The spraying end of the burner body is arranged in the gasification furnace and plays a role in supplying materials.
The nozzle body is internally provided with a coal powder channel and an oxygen channel which extend in the same direction between the inlet end and the ejection end and are sleeved with the inner part and the outer part, and coal powder enters from the coal powder channel at one side of the inlet end and is ejected from the coal powder channel at one side of the ejection end; oxygen enters from the oxygen channel at one side of the inlet end and is sprayed out from the oxygen channel at one side of the spraying end.
The periphery of the oxygen channel is wound with a cooling pipe for cooling the temperature of the burner body, and the influence on the normal working state of the burner body due to the overheating of the furnace temperature of the gasification furnace is avoided. The cooling tube end is close to the blowout end and is provided with a plurality of jet orifices, all jet orifices use the axis of buggy passageway as the rotatory distribution of center and all incline towards the buggy passageway, the medium that gets into the cooling tube is as cooling working medium when flowing along the cooling tube, play the effect that reduces the temperature of nozzle body, after the jet orifice blowout is followed to the form of vapor, on the one hand participate in fine coal gasification as the technology material, on the other hand encircles and rotates towards the axis of buggy passageway, be favorable to improving the whirl dispersion effect of buggy.
In conclusion, the pulverized coal gasification process burner takes the cooling pipe as the common channel of the cooling medium and the water vapor, so that the structure of the burner is simplified, the arrangement of a jacket in the prior art is avoided, and the thermal stress fatigue of the jacket is also avoided; all jet holes at the tail end of the cooling pipe encircle and rotate towards the axis of the pulverized coal channel, so that the rotational flow dispersion effect of the pulverized coal is improved, the structure of the burner is further reduced, and the processing difficulty is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a pulverized coal gasification process burner provided in an embodiment of the present invention;
FIG. 2 is a bottom view of FIG. 1;
FIG. 3 is an enlarged view of a portion of FIG. 1 at A;
FIG. 4 is a schematic flow chart of a pulverized coal gasification production method according to an embodiment of the present invention.
Wherein, 1-coal powder channel, 2-oxygen channel, 3-cooling pipe, 31-jet hole, 32-jet ring pipe and 33-water cooling pipe.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 to 4, fig. 1 is a schematic structural diagram of a pulverized coal gasification process burner provided in an embodiment of the present invention; FIG. 2 is a bottom view of FIG. 1; FIG. 3 is an enlarged view of a portion of FIG. 1 at A; FIG. 4 is a schematic flow chart of a pulverized coal gasification production method according to an embodiment of the present invention.
The invention provides a pulverized coal gasification process burner which comprises a burner body with an inlet end and an ejection end. The burner body is arranged in the gasification furnace, and the inlet end of the burner body is connected with process material supply equipment such as pulverized coal, oxygen and the like and used for supplying pulverized coal, oxygen and water vapor to the gasification furnace in work.
Pulverized coal passageway 1 and oxygen passageway 2 set up between entry end and blowout end, and pulverized coal passageway 1 and oxygen passageway 2 syntropy extend and interior endotheca establish, that is to say, oxygen passageway 2 cover establishes the periphery at pulverized coal passageway 1. The coal powder flows through the coal powder channel 1, and the oxygen flows through the gap between the outer wall of the coal powder channel 1 and the inner wall of the oxygen channel 2. Under operating condition, the fine coal gasification technology nozzle in the gasifier is influenced by ambient temperature, and its temperature is higher, influences the normal use of fine coal gasification technology nozzle, and for this reason, the periphery winding of oxygen passageway 2 has cooling tube 3, and the medium in the cooling tube 3 is used for reducing the temperature of oxygen passageway 2 and buggy passageway 1, plays the cooling effect.
The invention is provided with a plurality of jet holes 31 at the tail end of the cooling pipe 3, all the jet holes 31 are arranged close to the ejection end, all the jet holes 31 are rotationally distributed by taking the axis of the coal powder channel 1 as the center, and any jet hole 31 inclines towards the coal powder channel 1. Wherein, all the injection holes 31 are axially rotated along the pulverized coal passageway 1 as can be understood with reference to fig. 2, and all the injection holes 31 are distributed in the form of blades rotated clockwise.
When flowing along the cooling pipe 3, the medium in the cooling pipe 3 is used as a cooling medium and is used for reducing the temperature of the oxygen channel 2 and the coal powder channel 1; after being sprayed out from the spray holes 31 in a steam form, the steam is axially and rotationally sprayed along the axis of the pulverized coal channel 1 to drive the pulverized coal to be dispersed in a rotational flow manner.
The pulverized coal gasification process burner provided by the invention is further described below with reference to the accompanying drawings and embodiments.
Because the pulverized coal gasification process burner provided by the invention uses the gasified cooling medium as the process material and improves the rotational flow dispersion effect of the pulverized coal through the movement of the process material, on the basis of the above embodiment, the cooling pipe 3 comprises the air injection ring pipe 32 which is arranged along the plane of the injection end in a surrounding manner; the tail end of the air injection ring pipe 32 is provided with a plurality of injection holes 31, all the injection holes 31 inject steam to the outside of the nozzle body from the same plane, a plurality of strands of steam formed by all the injection holes 31 rotate outwards and extend around the coal powder channel 1, taking fig. 1 as an example, the coal powder flows from top to bottom along the coal powder channel 1, and all the injection holes 31 rotate around the coal powder channel 1 in the axial direction and flow downwards in a spiral mode. Since any injection hole 31 is inclined toward the axis of the pulverized coal passageway 1, a plurality of water vapor flows spirally downward and finally gradually meets a point on the axis of the pulverized coal passageway 1.
Further, the cooling pipe 3 further includes a water cooling pipe 33 spirally wound around the outer periphery of the oxygen passageway 2; the jet loop 32 is connected to the end of a water cooling pipe 33.
In the above embodiment, in order to improve the contact surface of the cooling pipe 3 with the oxygen passageway 2, the cooling pipe 3 further includes the water cooling pipe 33, and the water cooling pipe 33 is spirally wound around the outer periphery of the oxygen passageway 2.
Further, the water cooling pipes 33 between two adjacent circles are attached, so that the water cooling pipes 33 are tightly wrapped on the periphery of the oxygen channel 2 to improve the cooling effect.
In the embodiment provided by the present invention, the cross-section of the jet collar 32 is configured as a semi-circular hole, as shown in fig. 1, the flat bottom surface of the jet collar 32 is disposed below the nozzle body in a direction away from the inlet end, and the curved surface of the jet collar 32 is disposed above the flat bottom surface in a direction towards the inlet end.
To simplify the arrangement of the injection holes 31 and the control of the injection direction, all the injection holes 31 are arranged on the flat bottom surface of the injection collar 32.
Preferably, all the injection holes 31 are arranged at equal intervals, and a plurality of water vapor sprayed from the injection holes 31 uniformly surround and meet the pulverized coal airflow sprayed from the pulverized coal passage 1.
In order to prevent the gasification furnace from being difficult to ignite due to the steam sprayed from the spray holes 31, the pulverized coal gasification process burner adopted by the invention ensures that the included angle between the axis of any spray hole 31 and the axis of the pulverized coal channel 1 is not more than 20 degrees. Taking fig. 3 as an example, the axis of the injection hole 31 is the central axis of the injection hole 31, and the axis of the pulverized coal passage 1 is the vertical direction of fig. 3.
The diameter of any jet hole 31 of the pulverized coal gasification process burner adopted by the invention can be set to any numerical value of 2-5 mm, and the diameters of all jet holes 31 can be set to the same diameter.
The invention also provides a pulverized coal gasification process production line which comprises a gasification furnace and the pulverized coal gasification process burner.
The spraying end of the burner of the pulverized coal gasification process is arranged in the gasification furnace, and the pulverized coal introduced from the pulverized coal channel 1, the oxygen introduced from the oxygen channel 2 and the water vapor formed after the gasification of the cooling medium introduced from the cooling pipe 3 all enter the gasification furnace to participate in the production as the process material of the pulverized coal gasification process.
Wherein, the cooling medium introduced by the cooling pipe 3 can be used for cooling the oxygen channel 2 and the pulverized coal channel 1 when circulating along the cooling pipe 3, thereby prolonging the service life of the nozzle body.
Further, considering that when the furnace temperature of the gasification furnace is low, the gasification furnace and the nozzle body positioned in the gasification furnace are not enough to gasify the cooling medium in the cooling pipe 3, conversely, the temperature of the nozzle body does not reach the temperature to be cooled, at this time, water vapor is directly introduced into the cooling pipe 3, so as to ensure the normal operation of the pulverized coal gasification process, once the temperature of the furnace temperature and the temperature of the nozzle body positioned in the gasification furnace are raised to the preset temperature, generally 500-800 ℃, the water vapor in the cooling pipe 3 is replaced by the cooling water, and in brief, when the furnace temperature in the gasification furnace is lower than the preset temperature, the cooling pipe 3 is connected with a steam device for providing steam; the cooling pipe 3 is connected to a cooling water device for supplying cooling water when the furnace temperature in the gasification furnace is higher than or equal to a preset temperature. This operation can be achieved by a PLC and valves.
The invention also provides a pulverized coal gasification production method, which comprises the following steps:
s1: detecting the furnace temperature in the gasification furnace;
s2: and introducing steam and cooling water into a cooling pipe 3 of a pulverized coal gasification process burner connected to the gasification furnace in sequence according to the furnace temperature.
The pulverized coal gasification production method can be applied to the pulverized coal gasification process production line, the state of the medium in the cooling pipe 3 is changed according to the furnace temperature of the gasification furnace, and cooling water and steam share the same pipe cavity, so that the equipment structure is simplified.
For the second step, the following specific settings can be set: when the furnace temperature is not more than 800 ℃, introducing steam into the cooling pipe 3; when the furnace temperature rises to 800 ℃ or higher, cooling water is introduced into the cooling tube 3. In the latter case, since the furnace temperature is high, the cooling water is vaporized before reaching the injection holes 31. Wherein the steam can be set to 3.8 MPa; 800 ℃ is only one specific data given by the invention, and in actual production, other values between 500 ℃ and 800 ℃ can be set according to factors such as the size of the gasification furnace, the specific process and the like.
The pulverized coal gasification production method, the pulverized coal gasification process production line and the burner thereof provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
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| CN202010116916.9A CN111171878B (en) | 2020-02-25 | 2020-02-25 | Pulverized coal gasification production method, pulverized coal gasification process production line and burner thereof |
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| CN202010116916.9A CN111171878B (en) | 2020-02-25 | 2020-02-25 | Pulverized coal gasification production method, pulverized coal gasification process production line and burner thereof |
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| CN111171878B CN111171878B (en) | 2024-10-01 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115253734A (en) * | 2021-04-30 | 2022-11-01 | 国家能源投资集团有限责任公司 | Gas-solid mixer and coal gasification equipment |
| EP4592378A1 (en) * | 2024-01-26 | 2025-07-30 | Societa' per Azioni Curti - Costruzioni Meccaniche | Injector for a gasification apparatus |
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| CN115253734A (en) * | 2021-04-30 | 2022-11-01 | 国家能源投资集团有限责任公司 | Gas-solid mixer and coal gasification equipment |
| EP4592378A1 (en) * | 2024-01-26 | 2025-07-30 | Societa' per Azioni Curti - Costruzioni Meccaniche | Injector for a gasification apparatus |
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| Publication number | Publication date |
|---|---|
| CN111171878B (en) | 2024-10-01 |
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Country or region after: China Address after: 3rd Floor, Building 31, Shandong Energy Science and Technology Innovation Park, Jingshidong Road, Shengjing Street, Zhangqiu District, Jinan City, Shandong Province, 250000 Applicant after: Shandong Energy Group Coal Gasification New Materials Technology Co.,Ltd. Applicant after: SHANDONG ENERGY GROUP Co.,Ltd. Applicant after: SHANXI RESEARCH INSTITUTE FOR CLEAN ENERGY, TSINGHUA University Address before: Floor 17, block a, building 1, Jinan Yaogu, north section of Gangxing Third Road, Jinan high tech Industrial Development Zone, Shandong Province Applicant before: YANKUANG COAL WATER SLURRY GASIFICATION AND COAL CHEMICAL INDUSTRY NATIONAL ENGINEERING RESEARCH CENTER CO.,LTD. Country or region before: China Applicant before: YANKUANG GROUP Co.,Ltd. Applicant before: SHANXI RESEARCH INSTITUTE FOR CLEAN ENERGY, TSINGHUA University |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |