CN214131046U - Device for recovering and preparing industrial laughing gas from adipic acid tail gas - Google Patents
Device for recovering and preparing industrial laughing gas from adipic acid tail gas Download PDFInfo
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- CN214131046U CN214131046U CN202023269499.6U CN202023269499U CN214131046U CN 214131046 U CN214131046 U CN 214131046U CN 202023269499 U CN202023269499 U CN 202023269499U CN 214131046 U CN214131046 U CN 214131046U
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- 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
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/10—Capture or disposal of greenhouse gases of nitrous oxide (N2O)
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- 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
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The utility model discloses a device for recovering and preparing industrial laughing gas from adipic acid tail gas, which comprises a filter, an alkaline washing tower, an adsorption tower, a first condenser, a first gas-liquid separator, an evaporator, a second condenser and a second gas-liquid separator; the outlet of the filter is communicated with the inlet of the alkaline washing tower, the outlet of the alkaline washing tower is communicated with the inlet of the adsorption tower, the outlet of the adsorption tower is communicated with the gas-phase outlet of the first condenser, the gas-liquid mixed phase outlet of the first condenser is communicated with the gas-liquid mixed phase inlet of the first gas-liquid separator, the condensate outlet of the first gas-liquid separator is communicated with the liquid-phase inlet of the evaporator, the gas-phase outlet of the evaporator is communicated with the gas-phase inlet of the second condenser, and the gas-liquid mixed phase outlet of the second condenser is communicated with the gas-liquid mixed phase inlet of the second gas-liquid separator. The nitrous oxide in the adipic acid waste gas flow is recovered to obtain industrial laughing gas, so that the aim of environmental protection is fulfilled, and the nitrous oxide is effectively utilized to achieve two purposes.
Description
Technical Field
The utility model relates to a laughing gas purification field, concretely relates to retrieve device of preparation industry laughing gas from adipic acid tail gas.
Background
In the production process of nitric acid or adipic acid (nylon monomer), a large amount of byproduct waste gas is generated, the byproduct contains a large amount of nitrous oxide, commonly called laughing gas, and the chemical formula is N2O, and the nitrous oxide is widely used in industry due to the effects of anesthesia, oxidation and combustion supporting, meanwhile, the nitrous oxide is a greenhouse gas, the serious greenhouse effect can be generated when the byproduct waste gas containing the nitrous oxide is directly discharged into the air, for the purpose of environmental protection, most of the byproduct waste gas flow is decomposed before being discharged into the atmosphere, although the waste gas flow can be discharged after the decomposition, and certain components in the byproduct waste gas flow, particularly the large amount of nitrous oxide contained in the byproduct waste gas flow can reach 20% -50%, and the nitrous oxide is not utilized and is wasted. The byproduct waste stream may contain, in addition to nitrous oxide, a variety of impurities such as nitrogen higher compounds, carbon dioxide, carbon monoxide, nitrogen, oxygen, argon, moisture, and organic impurities. How to remove the impurities is a problem to be solved in the field.
Disclosure of Invention
The utility model aims at providing a retrieve device of preparation industry laughing gas in follow adipic acid tail gas, retrieve the nitrous oxide in the adipic acid waste gas stream, obtain industry laughing gas, both reached the purpose of environmental protection, made nitrous oxide obtain effective utilization again, kill two birds with one stone.
In order to achieve the above purpose, the utility model adopts the technical scheme that: an apparatus for recovering and preparing industrial laughing gas from adipic acid tail gas, comprising:
-a filtration unit comprising one stage or at least two stages of filters arranged in series;
-an alkaline scrubbing unit comprising one or at least two stages arranged in series of alkaline scrubbing towers containing alkaline scrubbing liquid;
-an adsorption unit comprising one or at least two stages of adsorption columns provided with molecular sieves arranged in series;
-a purification unit comprising a first condenser, a first gas-liquid separator, an evaporator, a second condenser and a second gas-liquid separator arranged in series;
the condenser is provided with a gas-phase inlet, a light component outlet and a gas-liquid mixed phase outlet, and the gas-liquid separator is provided with a gas-liquid mixed phase inlet, a light component outlet, a heavy component outlet and a condensate outlet;
the gas phase inlet of the first stage filter is communicated with an adipic acid tail gas source, the gas phase inlets of the other filters are communicated with the gas phase outlet of the previous stage filter, the gas phase inlet of the first stage alkaline washing tower is communicated with the gas phase outlet of the last stage filter, the gas phase inlets of the other alkaline washing towers are communicated with the gas phase outlet of the previous stage alkaline washing tower, the gas phase inlet of the first stage adsorption tower is communicated with the gas phase outlet of the last stage alkaline washing tower, the gas phase inlets of the other adsorption towers are communicated with the gas phase outlet of the previous stage adsorption tower, the gas phase inlet of the first condenser is communicated with the gas phase outlet of the last stage adsorption tower, the gas-liquid mixed phase inlet of the first gas-liquid separator is communicated with the gas-liquid mixed phase outlet of the first condenser, the liquid phase inlet of the evaporator is communicated with the condensate outlet of the first gas-liquid separator, and the gas phase inlet of the second condenser is communicated with the gas phase outlet of the evaporator, and a gas-liquid mixed phase inlet of the second gas-liquid separator is communicated with a gas-liquid mixed phase outlet of the second condenser.
In the above technical solution, the filter unit includes a two-stage filter.
In the above technical scheme, the alkaline washing tower is an alkaline washing tower containing ammonia water, an alkaline washing tower containing sodium hydroxide solution or an alkaline washing tower containing calcium hydroxide solution.
In the above technical scheme, the alkaline washing tower is vertical, the inlet of the alkaline washing tower is located at the axial middle part of the alkaline washing tower, and the outlet of the alkaline washing tower is located at the axial top of the alkaline washing tower.
In the above technical scheme, the adsorption tower is vertical, the inlet of the adsorption tower is located at the axial middle part of the adsorption tower, and the outlet of the adsorption tower is located at the axial top of the adsorption tower.
In the above technical scheme, the first and second condensers are both horizontal, a gas phase inlet thereof is positioned on the top side of one axial end thereof, a light component outlet thereof is positioned on the top side of the other axial end thereof, and a gas-liquid mixed phase outlet thereof is positioned on the bottom side of the other axial end thereof.
In the above technical scheme, the first and second gas-liquid separators are vertical, the inlet of the gas-liquid mixed phase is located in the axial middle part, the outlet of the light component is located at the axial top, the outlet of the heavy component is located at the axial bottom, and the outlet of the condensate is located in the axial middle part.
In the above technical solution, the evaporator is vertical, an inlet thereof is located at an axial middle portion thereof, and an outlet thereof is located at an axial top portion thereof.
In the above technical scheme, a buffer tank is further arranged between the filtering unit and the alkaline washing unit.
In the above technical scheme, the inlet sides of the alkaline washing tower and the adsorption tower are also provided with superchargers.
Because of the application of the technical scheme, compared with the prior art, the utility model has the following advantages:
(1) the utility model discloses a retrieve device of preparation industry laughing gas in follow adipic acid tail gas, through the filter unit, the solid particle thing in the desorption adipic acid tail gas, through alkaline washing unit, with nitrogen dioxide desorption to 0-10ppm, adsorb carbon dioxide to about 0-100ppm, through the adsorption unit, carbon dioxide and water are adsorbed to the degree of depth, through first purification unit, non-condensable gas oxygen, nitrogen gas, argon gas, carbon monoxide, nitric oxide, methane, light component such as hydrogen are emptied in step for the first time, through second purification unit, liquid laughing gas can vaporize once more, non-condensable gas is emptied once more, obtain industry laughing gas, industry laughing gas purity reaches 99.9%;
(2) the utility model discloses a device for recovering and preparing industrial laughing gas from adipic acid tail gas, which is provided with a buffer tank to keep the pressure of feed gas stable;
(3) the utility model discloses a retrieve device of preparation industry laughing gas in follow adipic acid tail gas, through setting up the booster compressor, improve the pressure of feed gas to be favorable to subsequent washing desorption.
Drawings
Fig. 1 is a schematic structural diagram of an apparatus for recovering and preparing industrial laughing gas from adipic acid tail gas, which is disclosed by the utility model.
Wherein: 10. a filter; 20. an alkaline washing column; 30. an adsorption tower; 41. a first condenser; 42. A first gas-liquid separator; 43. an evaporator; 44. a second condenser; 45. a second gas-liquid separator; 50. A buffer tank; 60. a supercharger.
Detailed Description
The invention will be further described with reference to the accompanying drawings and examples:
example one
Referring to fig. 1, an apparatus for recovering and preparing industrial laughing gas from adipic acid tail gas, as shown in the figure, comprises:
a filtration unit comprising two stages of filters 10 arranged in series;
an alkaline washing unit comprising a first alkaline washing column 20 containing an alkaline washing liquid;
an adsorption unit comprising a first adsorption column 30 containing a molecular sieve;
a purification unit comprising a first condenser 41, a first gas-liquid separator 42, an evaporator 43, a second condenser 44 and a second gas-liquid separator 45, arranged in series;
the condenser is provided with a gas-phase inlet, a light component outlet and a gas-liquid mixed phase outlet, and the gas-liquid separator is provided with a gas-liquid mixed phase inlet, a light component outlet, a heavy component outlet and a condensate outlet;
the outlet of the second-stage filter 10 is communicated with the inlet of the alkaline washing tower 20, the outlet of the alkaline washing tower 20 is communicated with the inlet of the adsorption tower 30, the outlet of the adsorption tower 30 is communicated with the gas-phase outlet of the first condenser 41, the gas-liquid mixed phase outlet of the first condenser 41 is communicated with the gas-liquid mixed phase inlet of the first gas-liquid separator 42, the condensate outlet of the first gas-liquid separator 42 is communicated with the liquid-phase inlet of the evaporator 43, the outlet of the evaporator 43 is communicated with the gas-phase inlet of the second condenser 44, and the gas-liquid mixed phase outlet of the second condenser 44 is communicated with the gas-liquid mixed phase inlet of the second gas-liquid separator 45.
The method for recovering and preparing the industrial laughing gas from the adipic acid tail gas by adopting the device comprises the following steps of:
(1) introducing the adipic acid tail gas into a filtering unit, and removing solid particles in the tail gas through a filter 10;
(2) introducing the adipic acid tail gas from which the solid particles are removed into an alkaline washing tower 20, wherein an ammonia water solution, a sodium hydroxide solution or a calcium hydroxide solution is arranged in the alkaline washing tower 20, nitrogen dioxide can be removed to 0-10ppm through the alkaline washing tower 20, and carbon dioxide is adsorbed to about 0-100 ppm;
(3) introducing the adipic acid tail gas subjected to preliminary carbon dioxide removal into an adsorption tower 30, wherein molecular sieves are filled in the tower and deeply adsorb carbon dioxide and water respectively;
(4) introducing the adipic acid tail gas subjected to water and carbon dioxide removal into a first condenser 41, emptying non-condensable gaseous substances from a light component outlet of the first condenser 41, and outputting a gas-liquid mixture from a gas-liquid mixed phase outlet of the first condenser 41, wherein the non-condensable gaseous substances comprise light components such as oxygen, nitrogen, argon, carbon monoxide, nitric oxide, methane, hydrogen and the like, and the gas-liquid mixture comprises laughing gas, residual non-condensable gaseous substances, a small amount of water and other impurities;
(5) introducing the gas-liquid mixture into the first gas-liquid separator 42, and discharging the non-condensable gaseous substances from the light component outlet of the first gas-liquid separator 42; heavy components such as water and particles are discharged from a heavy component outlet of the first gas-liquid separator 42, and condensate is discharged from a condensate outlet of the first gas-liquid separator, wherein the non-condensable gaseous substance comprises light components such as oxygen, nitrogen, argon, carbon monoxide, nitric oxide, methane and hydrogen, and the condensate comprises laughing gas, residual non-condensable gaseous substance and a small amount of impurities such as water;
(6) introducing the condensate into the evaporator 43, vaporizing the condensate again, discharging heavy components such as water and particulate matters from a heavy component outlet of the evaporator 43, and outputting gaseous substances from a gas phase outlet of the evaporator 43, wherein the gaseous substances comprise light components such as oxygen, nitrogen, argon, carbon monoxide, nitric oxide, methane, hydrogen and the like;
(7) introducing gaseous substances into the second condenser 44, discharging non-condensable gaseous substances from a light component outlet of the second condenser 44, and outputting a gas-liquid mixture from a gas-liquid mixed phase outlet of the second condenser 44, wherein the non-condensable gaseous substances comprise light components such as oxygen, nitrogen, argon, carbon monoxide, nitric oxide, methane, hydrogen and the like; the gas-liquid mixture comprises laughing gas, residual non-condensable gaseous substances, a small amount of water and other impurities;
(8) introducing the gas-liquid mixture into a second gas-liquid separator 45, and emptying the non-condensable gaseous substances from a light component outlet of the second gas-liquid separator 45; heavy components such as water and particulate matters are discharged from a heavy component outlet of the second gas-liquid separator 45, condensate is output from a condensate outlet of the second gas-liquid separator 45, wherein the non-condensable gaseous substances comprise light components such as oxygen, nitrogen, argon, carbon monoxide, nitric oxide, methane and hydrogen, and the condensate comprises laughing gas, residual non-condensable gaseous substances and a small amount of impurities such as water; the condensate is industrial laughing gas, and the content of the laughing gas reaches 99 percent.
In one embodiment, the alkaline scrubber 20 is an alkaline scrubber containing ammonia water.
In one embodiment, the alkaline scrubber 20 is an alkaline scrubber containing sodium hydroxide solution.
In one embodiment, the alkaline scrubber 20 is an alkaline scrubber containing a calcium hydroxide solution.
In one embodiment, the alkaline scrubber 20 is vertical with its inlet at its axial middle and its outlet at its axial top.
In one embodiment, the adsorption column 30 is vertical, with its inlet at the axial middle and its outlet at the axial top.
In one embodiment, each of the first condenser 41 and the second condenser 44 is horizontal, and has a gas-phase inlet on the top side at one axial end thereof, a light-component outlet on the top side at the other axial end thereof, and a gas-liquid mixed-phase outlet on the bottom side at the other axial end thereof.
In one embodiment, the first gas-liquid separator 42 and the second gas-liquid separator 45 are both vertical, and have a gas-liquid mixture inlet at the axial middle thereof, a light component outlet at the axial top thereof, a heavy component outlet at the axial bottom thereof, and a condensate outlet at the axial middle thereof.
In one embodiment, the evaporator 43 is vertical, with its inlet at its axial middle and its outlet at its axial top.
In one embodiment, a buffer tank 50 is also provided between the filtration unit and the alkaline washing unit.
In one embodiment, a booster 60 is further provided on the inlet side of the alkaline scrubber 20 and the adsorption column 30.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A device for recovering and preparing industrial laughing gas from adipic acid tail gas is characterized by comprising:
-a filtration unit comprising one or at least two stages of filters (10) arranged in series;
-an alkaline washing unit comprising one or at least two stages arranged in series of alkaline washing towers (20) containing alkaline washing liquid;
-an adsorption unit comprising one or at least two stages of adsorption columns (30) provided with molecular sieves arranged in series;
-a purification unit comprising a first condenser (41), a first gas-liquid separator (42), an evaporator (43), a second condenser (44) and a second gas-liquid separator (45) arranged in series;
wherein, the gas phase inlet of the first stage filter is communicated with the adipic acid tail gas source, the gas phase inlets of the other filters are communicated with the gas phase outlet of the previous stage filter, the gas phase inlet of the first stage alkaline washing tower is communicated with the gas phase outlet of the last stage filter, the gas phase inlets of the other alkaline washing towers are communicated with the gas phase outlet of the previous stage alkaline washing tower, the gas phase inlet of the first stage adsorption tower is communicated with the gas phase outlet of the last stage alkaline washing tower, the gas phase inlets of the other adsorption towers are communicated with the gas phase outlet of the previous stage adsorption tower, the gas phase inlet of the first condenser (41) is communicated with the gas phase outlet of the last stage adsorption tower, the gas-liquid mixed phase inlet of the first gas-liquid separator (42) is communicated with the gas-liquid mixed phase outlet of the first condenser (41), the liquid phase inlet of the evaporator (43) is communicated with the condensate outlet of the first gas-liquid separator (42), the gas-phase inlet of the second condenser (44) is communicated with the gas-phase outlet of the evaporator (43), and the gas-liquid mixed phase inlet of the second gas-liquid separator (45) is communicated with the gas-liquid mixed phase outlet of the second condenser (44).
2. The apparatus for recovering and preparing industrial laughing gas from adipic acid tail gas according to claim 1, wherein the filtration unit comprises a two-stage filter (10).
3. The device for recovering and preparing industrial laughing gas from adipic acid tail gas according to claim 1, wherein the alkaline scrubber (20) is an alkaline scrubber containing ammonia water, an alkaline scrubber containing sodium hydroxide solution, or an alkaline scrubber containing calcium hydroxide solution.
4. The apparatus for recovering and preparing industrial laughing gas from adipic acid tail gas according to claim 1, wherein the alkaline scrubber (20) is vertical, and has an inlet at the axial middle part thereof and an outlet at the axial top part thereof.
5. The apparatus for recovering and preparing industrial laughing gas from adipic acid tail gas according to claim 1, wherein the adsorption tower (30) is vertical, and an inlet thereof is located at the axial middle part thereof and an outlet thereof is located at the axial top part thereof.
6. The apparatus for recovering and preparing industrial laughing gas from adipic acid off-gas according to claim 1, wherein the first and second condensers (41,44) are horizontal, and have a gas phase inlet at a top side of one axial end thereof, a light component outlet at a top side of the other axial end thereof, and a gas-liquid mixed phase outlet at a bottom side of the other axial end thereof.
7. The apparatus for recovering and preparing industrial laughing gas from adipic acid tail gas according to claim 1, wherein the first and second gas-liquid separators (42,45) are vertical, and have a gas-liquid mixed phase inlet located at the axial middle part thereof, a light component outlet located at the axial top part thereof, a heavy component outlet located at the axial bottom part thereof, and a condensate outlet located at the axial middle part thereof.
8. An apparatus for recovering and preparing industrial laughing gas from adipic acid tail gas according to claim 1, wherein the evaporator (43) is vertical, and an inlet thereof is located at the axial middle part thereof, and an outlet thereof is located at the axial top part thereof.
9. The device for recovering and preparing industrial laughing gas from adipic acid tail gas according to claim 1, wherein a buffer tank (50) is further arranged between the filtering unit and the alkaline washing unit.
10. The device for recovering and preparing industrial laughing gas from adipic acid tail gas according to claim 1, wherein the inlet sides of the alkaline scrubber (20) and the adsorption column (30) are further provided with superchargers (60).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023269499.6U CN214131046U (en) | 2020-12-30 | 2020-12-30 | Device for recovering and preparing industrial laughing gas from adipic acid tail gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023269499.6U CN214131046U (en) | 2020-12-30 | 2020-12-30 | Device for recovering and preparing industrial laughing gas from adipic acid tail gas |
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| Publication Number | Publication Date |
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| CN214131046U true CN214131046U (en) | 2021-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202023269499.6U Active CN214131046U (en) | 2020-12-30 | 2020-12-30 | Device for recovering and preparing industrial laughing gas from adipic acid tail gas |
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| CN (1) | CN214131046U (en) |
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| GR01 | Patent grant | ||
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| CP03 | Change of name, title or address |
Address after: 215152 Anmin Road, Panyang Industrial Park, Huangdai Town, Xiangcheng District, Suzhou City, Jiangsu Province Patentee after: Jinhong Gas Co.,Ltd. Address before: 215152 No. 6 Anmin Road, Panyang Industrial Park, Huangdi Town, Xiangcheng District, Suzhou City, Jiangsu Province Patentee before: SUZHOU JINHONG GAS Co.,Ltd. |
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| CP03 | Change of name, title or address |