CN116236876A - Harmless treatment system for wellhead waste gas - Google Patents
Harmless treatment system for wellhead waste gas Download PDFInfo
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- CN116236876A CN116236876A CN202111482193.5A CN202111482193A CN116236876A CN 116236876 A CN116236876 A CN 116236876A CN 202111482193 A CN202111482193 A CN 202111482193A CN 116236876 A CN116236876 A CN 116236876A
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- pipeline
- hydrogen sulfide
- wellhead
- burner
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- 239000002912 waste gas Substances 0.000 title claims abstract description 31
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 88
- 238000001179 sorption measurement Methods 0.000 claims abstract description 75
- 238000002485 combustion reaction Methods 0.000 claims abstract description 64
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 50
- 239000003345 natural gas Substances 0.000 claims abstract description 46
- 229910000037 hydrogen sulfide Inorganic materials 0.000 claims abstract description 40
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims abstract description 39
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000001816 cooling Methods 0.000 claims abstract description 13
- 239000007789 gas Substances 0.000 claims abstract description 13
- 230000001502 supplementing effect Effects 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims description 28
- 238000002156 mixing Methods 0.000 claims description 16
- 238000009423 ventilation Methods 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 239000013589 supplement Substances 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 2
- 238000012360 testing method Methods 0.000 abstract description 8
- 238000003795 desorption Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000000446 fuel Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 6
- 239000002699 waste material Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- 230000008093 supporting effect Effects 0.000 description 3
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical class O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000010285 flame spraying Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements or dispositions of combustion apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
- B01D2257/304—Hydrogen sulfide
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a wellhead waste gas harmless treatment system, which comprises a combustion cylinder, a steam boiler, a boiler water supply tank, a steam turbine, a burner, a blower, a hydrogen sulfide adsorption box and a cooling tank, wherein the combustion cylinder is arranged on the combustion cylinder; the steam boiler and the burner are arranged in the combustion cylinder, the flame sprayed by the burner is heated by the steam boiler, the water supply tank of the boiler is used for supplementing water for the steam boiler, the steam turbine converts the heat energy of high-temperature steam generated by the steam boiler into kinetic energy and drives the blower to work, the blower cools the combustion cylinder and provides combustion air for the burner, the hydrogen sulfide adsorption tank is used for adsorbing natural gas discharged from the wellhead, the treated natural gas is used as fuel of the burner, the high-temperature steam generated by the steam boiler can also carry out desorption operation on the hydrogen sulfide adsorption tank, and the desorbed elemental sulfur is cooled and recovered in the cooling tank. The invention can improve the treatment efficiency of the oil field waste gas and shorten the oil test and test operation time in the production process of the oil gas well.
Description
Technical Field
The invention relates to the technical field of field equipment for underground operation in oil and gas field development, in particular to equipment for treating waste gas and natural gas in the oil testing process, and particularly relates to a wellhead waste gas harmless treatment system.
Background
In the process of natural gas exploration and development, waste natural gas is often generated in the processes of downhole operation oil testing, testing and trial production, and the waste natural gas (waste gas) is high in recovery cost and directly discharged to pollute the environment. The common treatment mode is to use a combustion pool to carry out combustion treatment on site, the treatment mode can generate strong light and noise, the normal work and rest of surrounding masses can be seriously influenced, a large amount of manpower and material resources can be wasted when the combustion pool is built, and the land after combustion is difficult to plough again. The existing natural airtight burner can perform combustion operation to treat wellhead waste gas natural gas, but has the problems of small treatment capacity, insufficient combustion of natural gas, sulfur dioxide pollutant generation due to combustion of sulfur-containing natural gas, low efficiency and the like, and influences the construction operation such as natural gas test.
Therefore, aiming at the current situation of treating the natural gas of the waste gas and the current situation of treating the waste gas of the wellhead of the oil field, the development of a treatment device capable of continuously treating the sulfur-containing natural gas and treating the waste gas of the wellhead of the large-displacement treatment well is needed to be researched and developed.
Disclosure of Invention
The invention aims to make up the defects of the prior art and provides a wellhead waste gas harmless treatment system which can improve the treatment efficiency of oilfield waste gas, reduce labor cost, achieve the purposes of harmless and environment-friendly treatment of wellhead waste gas and simultaneously shorten the oil testing and testing operation time in the production process of an oil gas well.
In order to solve the technical problems, the invention adopts the following technical scheme:
a harmless treatment system for wellhead waste gas comprises a combustion cylinder, a steam boiler, a boiler water supply tank, a steam turbine, a burner group, a blower, a hydrogen sulfide adsorption box and a cooling tank; wherein,,
the upper part of the combustion cylinder body is provided with an opening, and the lower part is provided with a ventilation opening;
the steam boiler is internally provided with water and fixedly connected in the combustion cylinder, the top of the steam boiler is provided with a steam outlet, and the lower part of the side wall of the steam boiler is provided with a water supplementing port and a water returning port;
the boiler water supply tank is connected with a water supplementing port through a water supply pipeline and supplements water for the steam boiler, and a first valve is further arranged on the water supply pipeline;
the steam inlet of the steam turbine is connected with the steam outlet through a first steam pipeline, the condensed water outlet of the steam turbine is connected with the water return port through a water return pipeline, a second valve is further arranged on the first steam pipeline and the water return pipeline respectively, and the output shaft of the steam turbine is in transmission connection with the blower and is used for driving the blower to rotate;
the burner group consists of a plurality of burner which are uniformly distributed at the lower part of the inner cavity of the combustion cylinder and are positioned below the steam boiler, the burner comprises a body and an electronic igniter, a mixing chamber is formed in the middle of the body, a flame injection hole is communicated with the upper part of the mixing chamber, an air inlet hole and a natural gas inlet hole are communicated with the lower part of the mixing chamber, the electronic igniter is fixedly connected to the body, and the ignition end of the electronic igniter is arranged in the mixing chamber;
the air outlet of the blower is respectively connected with the air vent and the air inlet hole through an air supply pipeline, and a third valve is further arranged on the air supply pipeline;
the hydrogen sulfide adsorption box is internally provided with an adsorption material for adsorbing hydrogen sulfide, the left end of the hydrogen sulfide adsorption box is connected with a wellhead through an exhaust gas pipeline, a fourth valve is further arranged on the exhaust gas pipeline, the right end of the hydrogen sulfide adsorption box is connected with a natural gas inlet hole through a natural gas pipeline, a fifth valve is further arranged on the natural gas pipeline, the upper end of the hydrogen sulfide adsorption box is connected with a steam outlet through a second steam pipeline, a sixth valve is further arranged on the second steam pipeline, the lower end of the hydrogen sulfide adsorption box is connected with a cooling tank through an elemental sulfur pipeline, and a seventh valve is further arranged on the elemental sulfur pipeline.
Further, a plurality of burner tips are arranged below the steam boiler in a multi-layer manner from top to bottom; the inner diameter of the lower part of the inner cavity of the combustion cylinder gradually decreases from top to bottom, and a plurality of burner tips arranged on the same layer are uniformly distributed along the circumferential direction and are fixed on the lower part of the inner cavity of the combustion cylinder.
Further, two hydrogen sulfide adsorption tanks are arranged in parallel.
Further, the hydrogen sulfide adsorption box comprises a box body, an external bracket and a plurality of drawers with adsorption materials arranged inside; wherein, the box body is fixedly connected on the external bracket; the drawer is arranged in the box body, is a rectangular shell which is jointly surrounded by an external end plate and four perforated plates and is provided with an opening at the upper part, the four perforated plates are arranged in the box body, a plurality of air holes are respectively distributed in each perforated plate, the external end plate is locked on the outer wall of the box body through bolts, and when the external end plate is unlocked, the drawer can be pushed and pulled so as to take and put the adsorption material.
Further, a plurality of drawers are sequentially arranged in the box body from top to bottom.
Further, the adsorption material is activated carbon.
Compared with the prior art, the wellhead waste gas harmless treatment system has the beneficial effects that:
1. the hydrogen sulfide adsorption box of the system can carry out hydrogen sulfide adsorption treatment on the sulfur-containing waste natural gas discharged from the wellhead, and the natural gas after adsorption treatment is used as fuel for heating the steam boiler, so that the steam boiler can generate high-temperature steam, and the waste of heat is avoided;
2. when the adsorption efficiency of the hydrogen sulfide adsorption box is low, the system can carry the elemental sulfur in the adsorption material into the cooling pool by introducing high-temperature steam generated by the steam boiler so as to improve the adsorption efficiency of the adsorption material; meanwhile, as the two hydrogen sulfide adsorption tanks are arranged and adopt a parallel structure, at least one hydrogen sulfide adsorption tank can normally operate, the high adsorption efficiency of the adsorption materials is ensured, the continuous hydrogen sulfide adsorption can be ensured, and the two hydrogen sulfide adsorption tanks can alternately perform the operations of replacing other adsorption materials or recovering elemental sulfur; the problems that the adsorption efficiency is gradually reduced along with the adsorption of the traditional adsorption device, a great deal of manpower and material resources are wasted when the adsorption material is replaced, and the wellhead waste gas treatment flow is interrupted in the process of replacing the adsorption material are solved;
3. the high-temperature steam of the system can also drive the steam turbine to rotate, and the linkage device is used for driving the blower to work; the air blower can provide sufficient air for the combustion of natural gas, so that the oxygen supply and the combustion efficiency of the combustion are improved; meanwhile, the blower can also convey a large amount of wind to the bottom of the combustion cylinder, so that the temperature of the combustion cylinder can be effectively reduced while the combustion efficiency is improved, and the requirement of treating the waste gas with large discharge capacity is met;
4. the system can not generate strong light and strong noise, occupies small land area, and avoids the problems that a great amount of manpower and material resources are wasted in building the combustion pool and the land after combustion is difficult to re-plough; the invention also has the advantages of environmental protection, high waste gas treatment efficiency, adaptability to severe weather, continuous operation and land saving.
Drawings
FIG. 1 is a schematic diagram of a wellhead exhaust gas abatement system of the present invention;
FIG. 2 is a schematic diagram of the internal structure of the middle combustion cylinder of the wellhead exhaust gas harmless treatment system of the present invention;
FIG. 3 is a schematic view of the internal structure of a middle burner tip of the wellhead exhaust gas innocent treatment system of the present invention;
fig. 4 is a schematic structural diagram of a hydrogen sulfide adsorption tank in the wellhead exhaust gas harmless treatment system of the present invention.
The device comprises a 1-combustion cylinder, a 101-ventilation opening, a 2-steam boiler, a 201-steam outlet, a 202-water supplementing opening, a 203-water returning opening, a 3-boiler water supply tank, a 4-steam turbine, a 5-combustion nozzle, a 501-body, a 502-electronic igniter, a 503-mixing chamber, a 504-flame injection hole, a 505-air inlet hole, a 506-natural gas inlet hole, a 6-blower, a 7-hydrogen sulfide adsorption box, a 701-box body, a 702-external support, a 703-drawer, an 8-cooling tank, a 9-water supply pipeline, a 10-first steam pipeline, a 11-water returning pipeline, a 12-air supply pipeline, a 13-waste gas pipeline, a 14-natural gas pipeline, a 15-second steam pipeline, a 16-elemental sulfur pipeline, a 17-first valve, a 18-second valve, a 19-third valve, a 20-fourth valve, a 21-fifth valve, a 22-sixth valve, a 23-seventh valve and a 24-wellhead.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that embodiments of the invention may be practiced without one or more of these details. In other instances, well-known features have not been described in detail in order to avoid obscuring the embodiments of the invention.
In the following description, a detailed structure will be presented for a thorough understanding of embodiments of the present invention. It will be apparent that embodiments of the invention may be practiced without limitation to the specific details that are set forth by those skilled in the art. Preferred embodiments of the present invention are described in detail below, however, the present invention may have other embodiments in addition to these detailed descriptions.
In the description of the present invention, the terms "inside", "outside", "longitudinal", "transverse", "upper", "lower", "top", "bottom", and the like refer to the orientation or positional relationship based on that shown in the drawings, only for convenience in describing the present invention, and do not require that the present invention must be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Embodiments of the present invention will be described in further detail below with reference to the attached drawings:
as shown in fig. 1, the wellhead exhaust gas harmless treatment system comprises a combustion cylinder 1, a steam boiler 2, a boiler water supply tank 3, a steam turbine 4, a burner group, a blower 6, a hydrogen sulfide adsorption box 7 and a cooling tank 8;
the combustion cylinder 1 is vertically arranged and covered outside the steam boiler 2, so that natural gas is combusted in the combustion cylinder 1, flame does not emerge from the combustion cylinder 1, the heat after combustion is fully utilized to heat the steam boiler 2 and generate steam, and meanwhile, the well site land can be effectively utilized in a vertical arrangement mode; in particular, the method comprises the steps of,
the combustion cylinder 1 is a cylinder structure with the length multiplied by the width multiplied by the height of 9000mm multiplied by 2700mm, the top of the combustion cylinder is provided with an opening, and the lower part of the combustion cylinder is provided with a vent 101 and a pipeline inlet; wherein, the ventilation opening 101 can allow natural wind and high-speed air provided by the blower 6 to pass through and enter the interior of the combustion cylinder 1, so that the internal heat dissipation efficiency of the combustion cylinder 1 can be improved, and the temperature of the combustion cylinder 1 can be reduced; the pipeline inlet can allow the natural gas pipeline 14 and the gas supply pipeline 12 to pass through and be connected with the burner tip 5 in the combustion cylinder 1;
a high-temperature resistant heat insulation layer made of refractory ceramic fibers is paved on the inner wall of the combustion cylinder 1, and the thickness of the heat insulation layer is 4-6mm; the high-temperature-resistant heat-insulating layer not only meets the condition that the highest temperature of the outer wall of the combustion cylinder 1 is less than or equal to 300 ℃ in a combustion state, but also has the noise intensity of less than or equal to 85dB at the position which is 20m away from the combustion cylinder 1, and the temperature difference between the high-temperature-resistant heat-insulating layer and the atmospheric environment is less than 10 ℃;
as shown in fig. 2, the steam boiler 2 is internally provided with water and fixedly connected in the combustion cylinder 1, the top of the steam boiler 2 is provided with a steam outlet 201, and the lower part of the side wall of the steam boiler 2 is provided with a water supplementing port 202 and a water returning port 203; the boiler water supply tank 3 is connected with the water supplementing port 202 through a water supply pipeline 9 and is used for supplementing water for the steam boiler 2 so as to effectively supplement the steam lost in the desorption operation process; the water supply pipeline 9 is also provided with a first valve 17, and water in the boiler water supply tank 3 can be fed into the steam boiler 2 by controlling the on-off of the first valve 17;
the steam inlet of the steam turbine 4 is connected with the steam outlet 201 through a first steam pipeline 10, the condensed water outlet of the steam turbine 4 is connected with the water return port 203 through a water return pipeline 11, and the output shaft of the steam turbine 4 is connected with the rotating shaft of the blower 6 through a transmission belt to drive the blower 6 to rotate; wherein, the high temperature steam generated after the steam boiler 2 is heated is discharged from the steam outlet 201 and split into two parts, one part of the high temperature steam enters the second steam pipeline 15 for recovering elemental sulfur, the other part of the high temperature steam enters the steam turbine 4 through the first steam pipeline 10 and converts the heat energy of the part of the high temperature steam into kinetic energy so as to drive the output shaft of the steam turbine 4 to rotate and further drive the blower 6 to work, the temperature of the high temperature steam is reduced and changed into cooling water after passing through the steam turbine 4, and the cooling water flows back into the steam boiler 2 through the water return pipeline 11; in addition, a second valve 18 is arranged on the first steam pipeline 10 and the water return pipeline 11 respectively, and the steam turbine 4 can be started and stopped by controlling the on-off of the two second valves 18;
as shown in fig. 2, the burner nozzle group is composed of a plurality of burner nozzles 5 so as to meet the requirement of larger natural gas treatment capacity; the plurality of burner tips 5 are arranged on an upper layer and a lower layer below the steam boiler 2, and the plurality of burner tips 5 arranged on the same layer are uniformly distributed and fixed on the lower part of the inner cavity of the combustion cylinder 1 along the circumferential direction; in use, natural gas is combusted at the burner tip 5 for heating the steam boiler 2; specifically, as shown in fig. 3, the burner 5 includes a main body 501 and an electronic igniter 502, a mixing chamber 503 is formed in the middle of the main body 501, a flame injection hole 504 is provided in the upper portion of the mixing chamber 503 in communication, an air inlet hole 505 and a natural gas inlet hole 506 are provided in the lower portion of the mixing chamber 503 in communication, the electronic igniter 502 is fixedly connected to the main body 501, and an ignition end of the electronic igniter 502 is disposed in the mixing chamber 503; the natural gas after adsorption treatment is conveyed to the mixing chamber 503 through the natural gas inlet hole 506, the air inlet hole 505 is connected with an air outlet of the air blower 6, the air blower 6 conveys air to the mixing chamber 503 at a high speed to play a role in supporting combustion of the natural gas, the high-speed air and the natural gas are uniformly mixed in the mixing chamber 503, then the electronic igniter 502 automatically ignites to generate flame, and the flame is sprayed out of the flame spraying hole 504 under the driving of the air flow of the high-speed air and heats the steam boiler 2;
the air outlet of the blower 6 is connected to the air inlet opening 505 and the air outlet opening 101 through the air supply line 12, specifically, the blower 6 transfers air to the air inlet opening 505 of the burner tip 5 and the air outlet opening 101 at the bottom of the combustion cylinder 1 along the air supply line 12 at a high speed under the driving of the steam turbine 4. Because a large amount of air is needed for burning waste gas, the oxygen supply requirement of the combustion is difficult to meet by natural air intake, and therefore, the high-speed air generated by the blower 6 can be mixed with the natural gas in the burner 5, the combustion-supporting requirement can be met, and meanwhile, the speed field can be kept uniform; in addition, the high-speed air generated by the blower 6 can enter the combustion cylinder 1 from the ventilation opening 101 at the bottom of the combustion cylinder 1, so that a certain combustion supporting effect can be achieved and the temperature of the combustion cylinder 1 can be effectively reduced. In addition, a third valve 19 is further arranged on the air supply pipeline 12, the connection or disconnection between the blower 6 and the ventilation opening 101 and the connection between the third valve 19 and the air inlet opening 505 can be controlled by controlling the connection or disconnection of the third valve 19, so that high-speed air can be supplied or stopped to the ventilation opening 101 and the air inlet opening 505, and natural gas in the burner tip 5 can be prevented from flowing out of the blower 6 under the condition of disconnection;
as shown in fig. 4, the hydrogen sulfide adsorbing tank 7 includes a tank body 701, an external stand 702, and a drawer 703; wherein, the box 701 is fixedly connected on an external bracket 702, and the external bracket 702 plays a role in supporting the box 701; an adsorption material for adsorbing hydrogen sulfide is placed in the drawer 703, and specifically, activated carbon is used as the adsorption material; the drawer 703 is a rectangular shell with an opening at the top, which is defined by an external end plate and four perforated plates, the opening at the top is convenient for taking and placing the adsorption material, the four perforated plates are all arranged in the box 701, a plurality of ventilation holes are densely distributed on each perforated plate, the ventilation holes are designed to enable the fluid entering the box 701 to be fully contacted with the adsorption material, the external end plate is locked on the outer wall of the box 701 through bolts, and the fixation of the drawer 703 and the box 701 can be realized; in addition, when the outer end plate is unlocked, the drawer 703 can be pushed and pulled to facilitate filling or replacement of the adsorbent material; in order to improve the adsorption efficiency, a plurality of drawers 703 may be designed according to the space of the case 701 and the drawers 703 may be sequentially installed on the case 703 from top to bottom;
the left end of the box 701 is connected with the wellhead 24 through the waste gas pipeline 13, a fourth valve 20 is further arranged on the waste gas pipeline 13, and the connection or disconnection between the box 701 and the wellhead 24 can be controlled by controlling the on-off of the fourth valve 20, so that the natural gas discharged from the wellhead 24 can be promoted or prevented from flowing into the box 701; the right end of the box 701 is connected with a natural gas inlet 506 through a natural gas pipeline 14, a fifth valve 21 is further arranged on the natural gas pipeline 14, and the connection or disconnection between the box 701 and the burner 5 can be controlled by controlling the on-off of the fifth valve 21, so that the natural gas flow after adsorption treatment can be promoted or prevented from flowing into the burner 5; the upper end of the box 701 is connected with the steam outlet 201 through a second steam pipeline 15, a part of high-temperature steam generated after the steam boiler 2 is heated enters the box 701 through the second steam pipeline 15, a sixth valve 22 is further arranged on the second steam pipeline 15, the connection or disconnection between the steam boiler 2 and the box 701 can be controlled by controlling the on-off of the sixth valve 22, and then the high-temperature steam can be promoted or prevented from flowing into the box 701; the lower end of the box 701 is connected with the cooling tank 8 through an elemental sulfur pipeline 16, a seventh valve 23 is further arranged on the elemental sulfur pipeline 16, and the connection or disconnection between the box 701 and the cooling tank 8 can be controlled by controlling the on-off of the seventh valve 23;
during adsorption operation, the fourth valve 20 and the fifth valve 21 are opened, the sixth valve 22 and the seventh valve 23 are closed, natural gas discharged from the wellhead 24 enters the box 701 through the waste gas pipeline 13, the natural gas fully contacts with the adsorption material in the box 701, hydrogen sulfide in the natural gas is adsorbed by the adsorption material, the adsorbed natural gas enters the burner 5 along the natural gas pipeline 14 and is combusted together with high-speed air, and the steam boiler 2 is heated. As adsorption proceeds, elemental sulfur in the adsorption material gradually increases, so that adsorption efficiency of the adsorption material becomes low, and at this time, desorption operation is required, specifically, when adsorption efficiency is low to 60%, the fourth valve 20 and the fifth valve 21 are closed, and the sixth valve 22 and the seventh valve 23 are opened, after which high-temperature steam enters into the tank 701, the temperature of the high-temperature steam can reach 200 ℃ or higher, elemental sulfur begins to gasify and separate from the adsorption material, and flows to the cooling tank 8 along with the high-temperature steam through the elemental sulfur pipeline 16, after which the elemental sulfur is solidified and recovered in the cooling tank 8, so that adsorption efficiency of the adsorption material is maintained.
In order to ensure the continuity of the work, two hydrogen sulfide adsorption tanks 7 are arranged in parallel, and the two hydrogen sulfide adsorption tanks 7 are arranged in parallel; each hydrogen sulfide adsorption tank 7 is respectively provided with four valves (namely a fourth valve 20, a fifth valve 21, a sixth valve 22 and a seventh valve 23), and the two hydrogen sulfide adsorption tanks 7 can control the respective four valves to alternately operate, so that one hydrogen sulfide adsorption tank 7 can still normally operate during desorption operation, and at least one hydrogen sulfide adsorption tank 7 can always perform adsorption operation, so that wellhead waste gas can be continuously and effectively treated.
In order to improve the automation degree, the system is further provided with a control system, the control system comprises an electric valve, a sensor, a PLC remote control cabinet and computer control software, the electric valve comprises a first valve 17, a second valve 18, a third valve 19, a fourth valve 20, a fifth valve 21, a sixth valve 22 and a seventh valve 23, the sensor comprises a metering device, a flame detector and the like, the metering device is arranged on each pipeline and can detect and collect fluid information in the pipeline, the flame detector is arranged in the combustion cylinder 1 and is positioned above the combustion nozzle 5 and is used for detecting whether the combustion nozzle 5 is sprayed with flame or not and collecting related information of the flame, the PLC remote control cabinet is electrically connected with the electronic igniter 502 and each electric valve and can receive instructions of the computer control software, and the computer control software sends instructions to the PLC remote control cabinet and controls the ignition operation of the electronic igniter 502 and the opening and closing of each electric valve according to the information uploaded by each sensor.
In summary, the present invention is not limited to the above-described embodiments, and other embodiments can be proposed by those skilled in the art within the technical spirit of the present invention, but are included in the scope of the present invention.
Claims (6)
1. The harmless treatment system for the wellhead waste gas is characterized by comprising a combustion cylinder, a steam boiler, a boiler water supply tank, a steam turbine, a burner nozzle group, a blower, a hydrogen sulfide adsorption box and a cooling tank; wherein,,
the upper part of the combustion cylinder body is provided with an opening, and the lower part is provided with a ventilation opening;
the steam boiler is internally provided with water and fixedly connected in the combustion cylinder, the top of the steam boiler is provided with a steam outlet, and the lower part of the side wall of the steam boiler is provided with a water supplementing port and a water returning port;
the boiler water supply tank is connected with a water supplementing port through a water supply pipeline and supplements water for the steam boiler, and a first valve is further arranged on the water supply pipeline;
the steam inlet of the steam turbine is connected with the steam outlet through a first steam pipeline, the condensed water outlet of the steam turbine is connected with the water return port through a water return pipeline, a second valve is further arranged on the first steam pipeline and the water return pipeline respectively, and the output shaft of the steam turbine is in transmission connection with the blower and is used for driving the blower to rotate;
the burner group consists of a plurality of burner which are uniformly distributed at the lower part of the inner cavity of the combustion cylinder and are positioned below the steam boiler, the burner comprises a body and an electronic igniter, a mixing chamber is formed in the middle of the body, a flame injection hole is communicated with the upper part of the mixing chamber, an air inlet hole and a natural gas inlet hole are communicated with the lower part of the mixing chamber, the electronic igniter is fixedly connected to the body, and the ignition end of the electronic igniter is arranged in the mixing chamber;
the air outlet of the blower is respectively connected with the air vent and the air inlet hole through an air supply pipeline, and a third valve is further arranged on the air supply pipeline;
the hydrogen sulfide adsorption box is internally provided with an adsorption material for adsorbing hydrogen sulfide, the left end of the hydrogen sulfide adsorption box is connected with a wellhead through an exhaust gas pipeline, a fourth valve is further arranged on the exhaust gas pipeline, the right end of the hydrogen sulfide adsorption box is connected with a natural gas inlet hole through a natural gas pipeline, a fifth valve is further arranged on the natural gas pipeline, the upper end of the hydrogen sulfide adsorption box is connected with a steam outlet through a second steam pipeline, a sixth valve is further arranged on the second steam pipeline, the lower end of the hydrogen sulfide adsorption box is connected with a cooling tank through an elemental sulfur pipeline, and a seventh valve is further arranged on the elemental sulfur pipeline.
2. The harmless treatment system for wellhead waste gas according to claim 1, wherein a plurality of burner tips are arranged in a plurality of layers from top to bottom below the steam boiler; the inner diameter of the lower part of the inner cavity of the combustion cylinder gradually decreases from top to bottom, and a plurality of burner tips arranged on the same layer are uniformly distributed along the circumferential direction and are fixed on the lower part of the inner cavity of the combustion cylinder.
3. The harmless treatment system for wellhead waste gas according to claim 1, wherein two hydrogen sulfide adsorption tanks are provided and are arranged in parallel.
4. The harmless treatment system for wellhead waste gas according to claim 1, wherein the hydrogen sulfide adsorption box comprises a box body, an external bracket and a plurality of drawers with adsorption materials inside; wherein, the box body is fixedly connected on the external bracket; the drawer is arranged in the box body, is a rectangular shell which is jointly surrounded by an external end plate and four perforated plates and is provided with an opening at the upper part, the four perforated plates are arranged in the box body, a plurality of air holes are respectively distributed in each perforated plate, the external end plate is locked on the outer wall of the box body through bolts, and when the external end plate is unlocked, the drawer can be pushed and pulled so as to take and put the adsorption material.
5. The harmless treatment system for wellhead waste gas according to claim 4, wherein the plurality of drawers are sequentially arranged in the box body from top to bottom.
6. The harmless treatment system for wellhead waste gas according to claim 1, wherein the adsorption material is activated carbon.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118615967A (en) * | 2024-08-14 | 2024-09-10 | 潍坊滨海龙业化工有限公司 | A device and method for producing sodium peroxide using high calcium sodium |
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