CN217604124U - Coal chemical industry changes acid gas processing apparatus - Google Patents
Coal chemical industry changes acid gas processing apparatus Download PDFInfo
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- CN217604124U CN217604124U CN202221532155.6U CN202221532155U CN217604124U CN 217604124 U CN217604124 U CN 217604124U CN 202221532155 U CN202221532155 U CN 202221532155U CN 217604124 U CN217604124 U CN 217604124U
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Abstract
The utility model relates to a coal chemical conversion acid gas treatment device; the device comprises a stripping tower for carrying out stripping separation on ammonia-containing wastewater, wherein a liquid outlet at the bottom of the stripping tower is connected with a gasification water washing tower, and a gas phase outlet at the top of the stripping tower is connected with a treatment and recovery unit through a cooling separation unit; an inlet at the upper part of the stripping tower is connected with an ammonia-containing wastewater pipe network, and an inlet at the lower part of the stripping tower is connected with a gasification flash evaporation steam pipe network; the treatment and recovery unit comprises a gas phase treatment and recovery part and a liquid phase treatment and recovery part; the gas phase treatment recovery part at least comprises a boiler combustion treatment piece; the liquid phase treatment recovery part at least comprises a gasification coal grinding piece; the waste recycling device has the characteristics of simple structure, reasonable design, capability of effectively reducing the operation cost and realizing the recycling of waste, and no environmental pollution.
Description
Technical Field
The utility model relates to an acid gas technical field specifically is a coal industry transform acid gas processing apparatus.
Background
Along with economic development, energy consumption of people is continuously increased, and clean and efficient utilization of coal is the development key point of energy in China in the future, so that the problem of environment friendliness of clean and efficient utilization of coal is very important, and the long-term sustainable development of coal chemical industry is related to energy safety in China. The conventional coal chemical conversion unit has two common treatment modes of acid gas, wherein 1, the acid gas is washed and diluted, and then a catalyst is added to treat acid liquid and discharge the acid liquid, and the mode needs to purchase a catalyst externally, so that the defect of high operation cost is overcome; see in particular patent numbers: 201821337590.7; 2. the converted acid gas is directly sent to a torch for incineration treatment, but the hydrogen sulfide contained in the acid gas generates sulfur dioxide or sulfur trioxide after being burned by the torch, which is still a toxic gas and has the problem of environmental pollution.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a coal chemical industry transform acid gas processing apparatus to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above purpose, the utility model provides a following technical scheme:
a coal chemical conversion acid gas treatment device comprises a stripping tower for carrying out stripping separation on ammonia-containing wastewater, wherein a liquid outlet at the bottom of the stripping tower is connected with a gasification water washing tower, and a gas phase outlet at the top of the stripping tower is connected with a treatment and recovery unit through a cooling separation unit; an inlet at the upper part of the stripping tower is connected with an ammonia-containing wastewater pipe network, and an inlet at the lower part of the stripping tower is connected with a gasification flash steam pipe network; the treatment and recovery unit comprises a gas phase treatment and recovery part and a liquid phase treatment and recovery part; the gas phase treatment recovery part at least comprises a boiler combustion treatment piece; the liquid phase treatment recovery part at least comprises a gasification coal grinding piece.
As a further preferred aspect of the present invention, the cooling separation unit includes a stripping off-gas cooler, a water cooler, and a gas-liquid separator; the first import of the waste gas cooler of strip waste gas cooler links to each other with the waste water network that contains ammonia, and the first export of the waste gas cooler of strip waste gas cooler links to each other with the upper portion import of strip tower, and the waste gas cooler second import of strip waste gas cooler links to each other with the top gas phase export of strip tower, and the waste gas cooler second export of strip waste gas cooler passes through the first passageway of water cooler and links to each other with the import of vapour and liquid separator.
As a further preferred aspect of the present invention, the gas phase treatment and recovery unit further includes a first tee disposed between the gas phase outlet of the gas-liquid separator and the boiler combustion processing member, and a third end of the first tee is connected to the flare apparatus through a third valve.
As a further preferred aspect of the present technical solution, the boiler combustion processing unit includes a fourth valve connected to the second end of the first tee, an outlet side of the fourth valve is connected to the boiler, and a waste flue gas outlet of the boiler is connected to the chimney through a flue gas desulfurization device.
As a further preferred aspect of the present technical solution, the liquid phase treatment recovery portion includes a second tee connected to the liquid phase outlet of the gas-liquid separator, a second end of the second tee is connected to a coal mill in the gasification coal grinding element through a first valve, and a third end of the second tee is connected to the sewage treatment system through a second valve.
As a further preferred option of the technical scheme, an inlet of the water cooler is connected with the circulating water storage tank, and an outlet of the water cooler is connected with the circulating water return storage tank.
The utility model provides a coal chemical industry transform acid gas processing apparatus possesses following beneficial effect:
(1) The utility model discloses the flash distillation gas among the well gasification flash distillation steam pipe network heats and takes place the steam stripping reaction to the waste water that contains ammonia in the waste water pipe network that contains ammonia, and the liquid phase in the steam stripping reaction gets into gasification scrubbing tower and recycles, and the gaseous phase after the steam stripping reaction is through cooling and separation to realize that the liquid phase after the separation and gaseous phase carry out the pertinence and retrieve and recycle; specifically, a liquid phase is recovered through a gasification coal grinding piece, and a gas phase is recovered through a boiler combustion mode; so as to solve the problems of high operation cost and environmental pollution in the traditional treatment mode.
(2) The utility model provides a cooling separation unit includes strip waste gas cooler, water cooler and vapour and liquid separator, not only can realize cooling down to the gaseous phase of discharging in the strip tower through strip waste gas cooling, can realize preheating the ammonia wastewater simultaneously to reach the purpose that reduces flash distillation gas consumption, furtherly, the utility model discloses a set up the water cooler and realize further cooling to waste gas, carried out gas-liquid separation through vapour and liquid separator for the later stage and established the basis.
(3) The utility model discloses in set up and handled the recovery unit, this unit divide into gas phase treatment recovery part and liquid phase treatment recovery part, preferably, the utility model discloses the treatment to the gaseous phase is: the waste gas is used as fuel in a boiler, and is treated by using a flue gas desulfurization device which is originally used for treating boiler flue gas in a boiler combustion treatment piece when the waste gas is discharged outside, so that the aim of environmental friendliness is fulfilled; the utility model discloses in flue gas desulfurization device can select to use current flue gas desulfurization equipment, also can use the patent name "a desulphurization unit of coprocessing boiler flue gas and sulphuric acid tail gas", the patent number is: 202021075051.8; preferably, the utility model discloses in to the liquid phase treatment mode do: feeding the liquid phase into a coal mill in a gasification coal grinding piece to be used as a raw material liquid; simultaneously the utility model discloses a guarantee entire system's long-time steady operation, consequently still set up the torch device in the vapor phase treatment recovery part, set up sewage treatment system in the liquid phase treatment recovery part, this sewage treatment system can be conventional sewage treatment system in the market, also can be for the patent number is simultaneously: 201821337590.7.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
In the figure: 1. a gasification flash steam pipe network; 2. a stripping column; 3. a stripping off-gas cooler; 4. a water cooler; 5. an ammonia-containing wastewater pipe network; 6. a gasification water washing tower; 7. a gas-liquid separator; 8. a first valve; 9. a coal mill; 10. a second valve; 11. a sewage treatment system; 12. a third valve; 13. a flare apparatus; 14. a fourth valve; 15. a boiler; 16. a flue gas desulfurization unit; 17. a chimney; 18. an exhaust gas cooler first inlet; 19. an exhaust gas cooler first outlet; 20. an exhaust gas cooler second inlet; 21. a second outlet of the exhaust gas cooler; 22. a first tee joint; 23. a second tee joint; 24. a circulating water storage tank; 25. and circulating water returns to the water storage tank.
Detailed Description
The technical solution in 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.
As shown in fig. 1, the utility model provides a technical scheme: a coal chemical industry transformation acid gas treatment device comprises a stripping tower 2 for carrying out stripping separation on ammonia-containing wastewater, wherein a liquid outlet at the bottom of the stripping tower 2 is connected with a gasification water washing tower 6, and a gas phase outlet at the top of the stripping tower 2 is connected with a treatment recovery unit through a cooling separation unit; an inlet at the upper part of the stripping tower 2 is connected with an ammonia-containing wastewater pipeline network 5, and an inlet at the lower part of the stripping tower 2 is connected with a gasification flash steam pipeline network 1; the treatment and recovery unit comprises a gas phase treatment and recovery part and a liquid phase treatment and recovery part; the gas phase treatment recovery part at least comprises a boiler combustion treatment piece; the liquid phase treatment recovery part at least comprises a gasification coal grinding piece. The utility model discloses mainly used handles the waste water that contains among the ammonia wastewater pipe network 5, heats the strip to containing ammonia wastewater through the flash distillation gas that uses in the gasification flash distillation steam pipe network 1, and recycle is carried out to the liquid phase after the strip, cools off the separation to the gaseous phase, and the gaseous phase after the separation gets into and uses as fuel in the boiler combustion processing spare, and the liquid phase after the separation uses as the raw materials in the gasification coal grinding spare to realize reducing running cost, realize recycle and environment-friendly purpose to the wastes material.
In this embodiment, specifically: the cooling separation unit comprises a stripping waste gas cooler 3, a water cooler 4 and a gas-liquid separator 7; the first import of waste gas cooler 18 of stripping waste gas cooler 3 links to each other with containing ammonia waste water pipe network 5, and the first export 19 of waste gas cooler of stripping waste gas cooler 3 links to each other with the upper portion import of strip tower 2, and the second import of waste gas cooler 20 of stripping waste gas cooler 3 links to each other with the top gas phase export of strip tower 2, and the second export 21 of waste gas cooler of stripping waste gas cooler 3 passes through the first passageway of water cooler 4 and links to each other with the import of vapour and liquid separator 7. The utility model discloses in strip exhaust gas cooler 3 among the cooling separation unit can realize the preheating to containing ammonia waste water, can cool down the gaseous phase of 2 outer rows of strip towers simultaneously, furtherly, the utility model discloses a water cooler 4 further cools down the gaseous phase and carries out gas-liquid separation for follow-up entering gas-liquid separator 7 in and establishes the basis.
In this embodiment, specifically: the gas phase treatment and recovery part also comprises a first tee joint 22 arranged between the gas phase outlet of the gas-liquid separator 7 and the boiler combustion treatment part, and the third end of the first tee joint 22 is connected with a torch device 13 through a third valve 12. The utility model provides a gas phase processing recovery part still is provided with flare apparatus 13 except setting up boiler burning and handling piece, can make the gaseous phase pass through flare apparatus 13 temporarily in order to guarantee entire system's steady operation promptly when boiler burning is handled the piece and is in maintenance state.
In this embodiment, specifically: the boiler combustion processing part comprises a first tee joint 22, a second end of the first tee joint passes through a fourth valve 14, the outlet side of the fourth valve 14 is connected with a boiler 15, and a waste flue gas outlet of the boiler 15 is connected with a chimney 17 through a flue gas desulfurization device 16. The utility model discloses in the boiler burning processing piece in included the boiler 15 who is used for burning waste gas, its flue gas gets into and handles in the flue gas desulfurization device 16 supporting with former boiler 15, discharges through chimney 17 after handling to reach the purpose of avoiding polluted environment.
In this embodiment, specifically: the liquid phase treatment recovery part comprises a second tee 23 connected with a liquid phase outlet of the gas-liquid separator 7, a second end of the second tee 23 is connected with a coal mill 9 in the gasification coal grinding piece through a first valve 8, and a third end of the second tee 23 is connected with a sewage treatment system 11 through a second valve 10. The utility model discloses except that gasification coal grinding spare, still be equipped with sewage treatment system 11 in the well liquid phase treatment recovery part to realize when gasification coal grinding spare parks or overhauls, the liquid phase is handled through sewage treatment system 11 temporarily, with the steady operation of guaranteeing entire system.
In this embodiment, specifically: the inlet of the water cooler 4 is connected with a circulating water storage tank 24, and the outlet of the water cooler 4 is connected with a circulating water return storage tank 25.
The utility model discloses a theory of operation does: step 1: 0.3-0.5 Mpa, 20-60 ℃ and NH3-N content 20000-40000mg/L ammonia-containing wastewater from the ammonia-containing wastewater pipe network 5 exchanges heat with stripping exhaust gas from the top of the stripping tower 2 at 0.1-0.2 Mpa and 120-130 ℃ through the stripping exhaust gas cooler 3, and is heated to 105-115 ℃ to enter the middle upper part of the stripping tower 2; step 2: the ammonia-containing wastewater heated in the step 1 is heated by flash steam/steam with the pressure of 0.2-0.8 Mpa and the temperature of 120-175 ℃ from a gasification flash steam pipe network 1 in a stripping tower 2, stripped waste gas is ejected from the stripping tower 2 and is subjected to two-stage condensation by a stripped waste gas cooler 3 and a water cooler 4 to be divided into gas-liquid two phases, the gas-liquid two phases are further subjected to gas-liquid separation in a gas-liquid separator 7, gas phases (acid gases) after the gas-liquid separation are sent to a boiler 15 for incineration treatment, and flue gas after the incineration treatment is treated by a flue gas desulfurization device 16 and then is discharged from a chimney 17; when the boiler 15 is shut down or overhauled, the gas phase (acid gas) after gas-liquid separation is sent to the flare device 13 for treatment; and 3, step 3: and the liquid phase after gas-liquid separation is sent to a coal mill 9 of a gasification coal grinding piece to be used as raw material liquid, and the liquid phase is sent to a sewage treatment system 11 to be treated when the coal mill 9 is stopped or overhauled. And 4, step 4: the bottom temperature of the stripping tower 2 in the step 2 is as follows: the condensed water with the temperature of 120-130 ℃ is sent into a gasification water scrubber 6 for recycling. The process has the characteristics of simple structure, reasonable design, capability of effectively reducing the operation cost and realizing the recycling of wastes, and no environmental pollution.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The device for treating the acid gas generated by the coal chemical conversion is characterized by comprising a stripping tower (2) for stripping and separating ammonia-containing wastewater, wherein a liquid outlet at the bottom of the stripping tower (2) is connected with a gasification water washing tower (6), and a gas phase outlet at the top of the stripping tower (2) is connected with a treatment and recovery unit through a cooling and separation unit;
an inlet at the upper part of the stripping tower (2) is connected with an ammonia-containing wastewater pipe network (5), and an inlet at the lower part of the stripping tower (2) is connected with the gasification flash steam pipe network (1);
the treatment and recovery unit comprises a gas phase treatment and recovery part and a liquid phase treatment and recovery part;
the gas phase treatment recovery part at least comprises a boiler combustion treatment piece; the liquid phase treatment recovery part at least comprises a gasification coal grinding piece.
2. The coal chemical conversion acid gas treatment device according to claim 1, characterized in that: the cooling and separating unit comprises a stripping waste gas cooler (3), a water cooler (4) and a gas-liquid separator (7); the first import (18) of the waste gas cooler of strip waste gas cooler (3) links to each other with containing ammonia waste water pipe network (5), the first export (19) of the waste gas cooler of strip waste gas cooler (3) links to each other with the upper portion import of strip tower (2), the waste gas cooler second import (20) of strip waste gas cooler (3) links to each other with the top gas phase export of strip tower (2), the waste gas cooler second export (21) of strip waste gas cooler (3) links to each other through the import of first passageway and vapour and liquid separator (7) of water cooler (4).
3. The coal chemical conversion acid gas treatment device according to claim 1, characterized in that: the gas phase treatment and recovery part also comprises a first tee joint (22) arranged between a gas phase outlet of the gas-liquid separator (7) and the boiler combustion treatment part, and the third end of the first tee joint (22) is connected with a torch device (13) through a third valve (12).
4. The coal chemical industry conversion acid gas processing apparatus according to claim 1 or 3, characterized in that: the boiler combustion processing part comprises a fourth valve (14) connected with the second end of the first tee joint (22), the outlet side of the fourth valve (14) is connected with the boiler (15), and the waste flue gas outlet of the boiler (15) is connected with a chimney (17) through a flue gas desulfurization device (16).
5. The coal chemical conversion acid gas treatment device according to claim 1, characterized in that: the liquid phase treatment recovery part comprises a second tee joint (23) connected with a liquid phase outlet of the gas-liquid separator (7), a second end of the second tee joint (23) is connected with a coal mill (9) in the gasification coal grinding piece through a first valve (8), and a third end of the second tee joint (23) is connected with a sewage treatment system (11) through a second valve (10).
6. The coal chemical conversion acid gas treatment device according to claim 2, characterized in that: the inlet of the water cooler (4) is connected with the circulating water storage tank (24), and the outlet of the water cooler (4) is connected with the circulating water return storage tank (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221532155.6U CN217604124U (en) | 2022-06-17 | 2022-06-17 | Coal chemical industry changes acid gas processing apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221532155.6U CN217604124U (en) | 2022-06-17 | 2022-06-17 | Coal chemical industry changes acid gas processing apparatus |
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| CN217604124U true CN217604124U (en) | 2022-10-18 |
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| CN202221532155.6U Active CN217604124U (en) | 2022-06-17 | 2022-06-17 | Coal chemical industry changes acid gas processing apparatus |
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