CN111420539A - Automobile exhaust purification system and method based on gas hydrate method - Google Patents
Automobile exhaust purification system and method based on gas hydrate method Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 38
- NMJORVOYSJLJGU-UHFFFAOYSA-N methane clathrate Chemical compound C.C.C.C.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O NMJORVOYSJLJGU-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 238000000746 purification Methods 0.000 title claims abstract description 12
- 238000006703 hydration reaction Methods 0.000 claims abstract description 57
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910002091 carbon monoxide Inorganic materials 0.000 claims abstract description 25
- 230000003647 oxidation Effects 0.000 claims abstract description 20
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 20
- 238000001179 sorption measurement Methods 0.000 claims abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims description 81
- 239000007789 gas Substances 0.000 claims description 77
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 46
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims description 40
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 27
- 229910001868 water Inorganic materials 0.000 claims description 27
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 23
- 239000001569 carbon dioxide Substances 0.000 claims description 23
- 238000001816 cooling Methods 0.000 claims description 20
- 239000001257 hydrogen Substances 0.000 claims description 16
- 229910052739 hydrogen Inorganic materials 0.000 claims description 16
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 150000004677 hydrates Chemical class 0.000 description 10
- 239000007787 solid Substances 0.000 description 9
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000002912 waste gas Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000036571 hydration Effects 0.000 description 3
- 150000002431 hydrogen Chemical class 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- VTVVPPOHYJJIJR-UHFFFAOYSA-N carbon dioxide;hydrate Chemical compound O.O=C=O VTVVPPOHYJJIJR-UHFFFAOYSA-N 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 229910052815 sulfur oxide Inorganic materials 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D49/00—Separating dispersed particles from gases, air or vapours by other methods
-
- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
-
- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/62—Carbon oxides
-
- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/72—Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons
-
- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/50—Carbon oxides
- B01D2257/502—Carbon monoxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/01—Engine exhaust gases
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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Abstract
The invention discloses a system and a method for purifying automobile exhaust based on a gas hydrate method, and belongs to the technical field of automobile exhaust purification treatment equipment. The system comprises a shell and a primary adsorption device, a carbon monoxide oxidation device and a grading hydration reaction device which are arranged in the shell, wherein the primary adsorption device, the carbon monoxide oxidation device and the grading hydration reaction device are sequentially connected through pipelines. The invention utilizes a gas hydrate method to purify the automobile exhaust with high efficiency and low cost through a graded hydration reaction device, and the formed hydrate can be intensively treated and recycled.
Description
Technical Field
The invention belongs to the technical field of automobile exhaust purification treatment equipment, and particularly relates to a system and a method for purifying automobile exhaust based on a gas hydrate method.
Background
Automobile exhaust is exhaust gas generated when an automobile is used, and the exhaust gas can not only directly harm human health, but also have a profound influence on the environment of human life. Scientific analysis shows that pollutants contained in automobile exhaust comprise solid suspended particles, carbon monoxide, carbon dioxide, hydrocarbons, sulfur oxides and the like. The sulfur dioxide in the tail gas has strong pungent smell, and the sulfur dioxide easily causes the generation of acid rain when reaching a certain concentration, so that soil and water sources are acidified, and the growth of crops and forests is influenced.
Automobile exhaust is one of main sources of PM2.5 in large cities, is one of the main causes of atmospheric pollution in many cities, and photochemical smog is one of the main effects of the automobile exhaust. With the rapid development of economy in China in recent years, a large number of large cities and a plurality of super-large cities which surpass the world level appear in China, the large-scale development process of the cities is accompanied by the rapid increase of the quantity of motor vehicles, so that great pressure is brought to the atmospheric environment, and the fact that the haze weather lasts for a plurality of days in Beijing areas in the early 2013 is a powerful proof. Although the automobile exhaust treatment has no problems in the technology, the related area is large, the cost investment is high, and a certain economic pressure is caused by related subjects, particularly owners.
Gas hydrates are complexes formed from water and gas molecules under conditions of low temperature and high pressure. According to the existing research results, different gases have different temperature and pressure conditions required for forming hydrates, carbon dioxide can form hydrates under the conditions of 2MPa and 4 ℃, the forming conditions of hydrogen sulfide and sulfur dioxide are lower, and if the reaction is to be faster, a plurality of accelerators for accelerating the formation of the hydrates can be used.
The working principle of the existing automobile exhaust purifier is that nitrogen oxides, carbon monoxide and hydrocarbons which are not fully combusted in exhaust are degraded into nontoxic and harmless nitrogen, carbon dioxide and water by high-temperature oxidation-reduction reaction when the exhaust passes through a honeycomb carrier loaded with a noble metal catalyst. However, the conversion of the pollution gas into harmless gas is still not complete, and therefore, further research is needed to improve the conversion efficiency of the automobile exhaust gas and reduce the pollution to the atmosphere.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a system for purifying the automobile exhaust based on a gas hydrate method, and the invention also aims to provide a method for purifying the automobile exhaust based on the gas hydrate method.
The technical scheme adopted by the invention for realizing the purpose is as follows:
the utility model provides a purify automobile exhaust system based on gas hydrate method, includes that casing and the primary adsorption device, carbon monoxide oxidation device, the hierarchical hydration reaction device that set up in the casing connect gradually through the pipeline of primary adsorption device, carbon monoxide oxidation device, hierarchical hydration reaction device.
The primary adsorption device is used for adsorbing solid particles and high-molecular organic substances in tail gas, the carbon monoxide oxidation device is used for reacting carbon monoxide in high-temperature tail gas with water to form carbon dioxide and hydrogen, the hydrogen can be directly discharged into the atmosphere, water and an accelerant are added in the graded hydration reaction device in advance, the solid gas hydrate formed by the hydration reaction of the carbon dioxide, formaldehyde and sulfur dioxide in the tail gas with water is stored in the reactor, and other harmless gases are discharged into the atmosphere.
Further, a tail gas conveying pipeline between the carbon monoxide oxidation device and the grading hydration reaction device is also connected with a first cooling device and a first pressurizing device.
The first cooling device cools the high-temperature tail gas in the pipeline, the first supercharging device pressurizes the high-temperature tail gas in the pipeline, and the efficiency of hydration reaction in the grading hydration reaction device can be promoted through cooling and pressurization.
Further, a hydrogen collecting device is further connected to the tail gas conveying pipeline between the carbon monoxide oxidation device and the first cooling device, and the hydrogen collecting device collects, absorbs or separates and collects hydrogen generated by the carbon monoxide oxidation device and then discharges the hydrogen into the atmosphere.
Further, hierarchical hydration reaction unit includes first reation kettle, second reation kettle, third reation kettle, and first reation kettle, second reation kettle, third reation kettle pass through tail gas pipeline and connect gradually.
Hydration accelerators are arranged in the first reaction kettle, the second reaction kettle and the third reaction kettle in advance, so that carbon dioxide, formaldehyde and sulfur dioxide are subjected to hydration reaction for multiple times step by step and absorbed, and solid gas hydrate formed by the hydration reaction is stored in the corresponding reaction kettles.
Further, check valves are arranged on tail gas conveying pipelines between the first cooling device and the first supercharging device, between the first reaction kettle and the second reaction kettle, between the second reaction kettle and the third reaction kettle and behind the third reaction kettle.
Further, the second reaction kettle is connected with a second cooling device through a pipeline.
The second cooling device further cools the tail gas, and promotes carbon dioxide, formaldehyde, sulfur dioxide and water in the tail gas to carry out hydration reaction.
Further, the third reaction kettle is connected with a second supercharging device through a pipeline.
The second supercharging device is used for further pressurizing the tail gas to promote hydration reaction of carbon dioxide, formaldehyde and sulfur dioxide in the tail gas and water.
Further, stirring devices are arranged in the first reaction kettle, the second reaction kettle and the third reaction kettle.
The stirring device stirs water to accelerate the hydration reaction between the gas and the water to generate gas hydrate.
Further, a gas detection device is arranged on the tail gas conveying pipeline behind the third reaction kettle.
The gas detection device is used for detecting the waste gas value of the harmless gas discharged by the grading hydration reaction device, and when the waste gas value rises, the hydration reaction device needs to be replaced.
The invention also provides a method for purifying the automobile exhaust based on the gas hydrate method, which is used for purifying the automobile exhaust by using the system for purifying the automobile exhaust based on the gas hydrate method and then discharging the automobile exhaust.
In some embodiments of the present invention, the same compound accelerator is added into the first reaction kettle, the second reaction kettle, and the third reaction kettle, and each reaction kettle can perform hydration reaction on carbon dioxide, formaldehyde, and sulfur dioxide, so that the first reaction kettle, the second reaction kettle, and the third reaction kettle absorb multiple mixed gases to obtain multiple gas hydrates.
In other embodiments of the present invention, different single accelerators are added into the first reaction kettle, the second reaction kettle and the third reaction kettle, and the single accelerator specifically accelerates the hydration reaction with water for one of carbon dioxide, formaldehyde and sulfur dioxide, so that different types of gases are absorbed in the first reaction kettle, the second reaction kettle and the third reaction kettle.
In summary, due to the adoption of the technical scheme, the beneficial technical effects of the invention are as follows: the gas hydrate method is utilized to realize the high-efficiency and low-cost purification of the automobile exhaust through a graded hydration reaction device, and the formed hydrate can be intensively treated and recycled.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
the labels in the figure are: the method comprises the following steps of 1-a shell, 2-a primary adsorption device, 3-a carbon monoxide oxidation device, 4-a hydrogen collection device, 5-a first cooling device, 6-a first pressurization device, 7-a staged hydration reaction device, 8-a first reaction kettle, 9-a second reaction kettle, 10-a third reaction kettle, 11-a second cooling device, 12-a second pressurization device, 13-a stirring device and 14-a gas detection device.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
Referring to the attached drawing 1, the system for purifying the automobile exhaust based on the gas hydrate method provided by the invention comprises a shell 1, and a primary adsorption device 2, a carbon monoxide oxidation device 3 and a staged hydration reaction device 7 which are arranged in the shell 1, wherein the primary adsorption device 2, the carbon monoxide oxidation device 3 and the staged hydration reaction device 7 are sequentially connected through a pipeline; the primary adsorption device 2 is used for adsorbing solid particles and high molecular organic substances in tail gas, the carbon monoxide oxidation device 3 is used for reacting carbon monoxide in high-temperature tail gas with water to form carbon dioxide and hydrogen, the hydrogen can be directly discharged into the atmosphere, the graded hydration reaction device 7 is added with water and an accelerant in advance, the gas is used for carrying out hydration reaction on the carbon dioxide, formaldehyde and sulfur dioxide in the tail gas and the water to form solid gas hydrate, the solid gas hydrate is stored in the reactor, and other harmless gases are discharged into the atmosphere.
Tail gas pipeline between carbon monoxide oxidation device 3, the hierarchical hydration reaction device 7 still is connected with first cooling device 5, first supercharging device 6, and first cooling device 5 cools down the high temperature tail gas in the pipeline, and first supercharging device 6 pressurizes the high temperature tail gas in the pipeline, through cooling pressurization can promote the efficiency of hydration reaction in the hierarchical hydration reaction device 7.
The tail gas conveying pipeline between the carbon monoxide oxidation device 3 and the first cooling device 5 is also connected with a hydrogen collecting device 4, and the hydrogen collecting device 4 collects, absorbs or separates and collects hydrogen generated by the carbon monoxide oxidation device 3 and then discharges the hydrogen into the atmosphere.
Hierarchical hydration reaction unit 7 includes first reation kettle 8, second reation kettle 9, third reation kettle 10, first reation kettle 8, second reation kettle 9, third reation kettle 10 connects gradually through tail gas pipeline, all add in advance in first reation kettle 8, second reation kettle 9, the third reation kettle 10 and be equipped with the hydration promoter, to carbon dioxide, formaldehyde, sulfur dioxide carry out the hydration reaction absorption many times step by step, the hydration reaction forms solid-state gas hydrate and conserves in corresponding reation kettle.
And one-way valves are arranged on tail gas conveying pipelines between the first cooling device 5 and the first supercharging device 6, between the first reaction kettle 8 and the second reaction kettle 9, between the second reaction kettle 9 and the third reaction kettle 10 and behind the third reaction kettle 10.
The second reaction kettle 9 is connected with a second cooling device 11 through a pipeline, and the second cooling device 11 further cools the tail gas to promote hydration reaction of carbon dioxide, formaldehyde and sulfur dioxide in the tail gas and water; the third reaction kettle 10 is connected with a second supercharging device 12 through a pipeline, and the second supercharging device 12 further pressurizes the tail gas to promote hydration reaction of carbon dioxide, formaldehyde and sulfur dioxide in the tail gas and water; all be equipped with agitating unit 13 in first reation kettle 8, second reation kettle 9, the third reation kettle 10, agitating unit 13 stirs water, takes place hydration reaction with higher speed between gas and the water and generates gas hydrate.
And a gas detection device 14 is further arranged on the tail gas conveying pipeline behind the third reaction kettle 10 and used for detecting the waste gas value of the harmless gas discharged from the grading hydration reaction device 7, and when the waste gas value rises, the hydration reaction device needs to be replaced.
The principle of the invention for purifying the tail gas of the automobile tail gas purifying system based on the gas hydrate method is as follows: firstly, the automobile exhaust is introduced into a primary filtering device to adsorb solid particles and high molecular organic substances in the exhaust, carbon monoxide in the residual high-temperature exhaust reacts with water in a carbon monoxide oxidation device 3 to form carbon dioxide and hydrogen, the hydrogen can be directly discharged, the carbon dioxide, formaldehyde and sulfur dioxide undergo a hydration reaction in a staged hydration reaction device 7 due to different temperatures and promoters required by the hydration reaction, and the formed solid gas hydrate is stored in the staged hydration reaction device 7. The gas enters a staged hydration reaction device 7, a certain amount of water in the staged hydration reaction device 7 can form hydrate with carbon dioxide, formaldehyde and sulfur dioxide in automobile exhaust under certain temperature and pressure conditions, a gas detection device 14 is arranged at an exhaust port, and when the gas detection device detects that the value of the exhaust gas rises, the staged hydration reaction device 7 needs to be replaced. The replaced old staged hydration reactor 7 can be recycled in a centralized manner to decompose the hydrates therein and recover the gases for other industrial uses.
The first reaction kettle 8, the second reaction kettle 9 and the third reaction kettle 10 can realize hydration reaction of different gases and hydration reaction under the conditions of different temperatures and different pressures, and harmful gases in automobile exhaust can be absorbed to be purified.
Gas hydrateIs a complex formed by water and gas molecules under the conditions of low temperature and high pressure. According to the existing research results, the temperature and pressure conditions required by different gases for forming hydrates are different, carbon dioxide can form hydrates under the conditions of 2MPa and 4 ℃, and the forming conditions of hydrogen sulfide and sulfur dioxide are lower. Therefore, other gases can form hydrates as long as the apparatus can achieve the warm pressure conditions for carbon dioxide hydrate formation. According to the study, 1m3Can release 164m of hydrate3The gas (2) has a volume expansion rate of 20% after water forms a hydrate. That is, about 0.8m3 of water can hold 164m3The gas of (2). So, it can be said that a large amount of gas can be absorbed with a small amount of water. The gas hydrate may be water or gas, and if the reaction is to be accelerated, some accelerator may be used to accelerate the formation of the hydrate. The gas hydrate reaction material is simple, no harm is caused, secondary pollution to the environment is avoided, the formed gas hydrate can be intensively recycled in the tank body for item treatment, and the automobile exhaust can be thoroughly purified.
Example 2
On the basis of embodiment 1, the invention also provides a method for purifying automobile exhaust based on the gas hydrate method, and the automobile exhaust is discharged after the automobile exhaust purification treatment is carried out by utilizing the system for purifying the automobile exhaust based on the gas hydrate method.
The same compound accelerant is added into the first reaction kettle 8, the second reaction kettle 9 and the third reaction kettle 10, and each reaction kettle can carry out hydration reaction on carbon dioxide, formaldehyde and sulfur dioxide, so that various mixed gases are absorbed in the first reaction kettle 8, the second reaction kettle 9 and the third reaction kettle 10 to obtain various gas hydrates.
Example 3
Different from embodiment 3, in this embodiment, different single accelerators are added into the first reaction kettle 8, the second reaction kettle 9, and the third reaction kettle 10, and the single accelerator specifically accelerates the hydration reaction with water for one of carbon dioxide, formaldehyde, and sulfur dioxide, so that different types of gases are absorbed in the first reaction kettle 8, the second reaction kettle 9, and the third reaction kettle 10.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A system for purifying automobile exhaust based on a gas hydrate method comprises a shell and a primary adsorption device arranged in the shell, and is characterized in that a carbon monoxide oxidation device and a staged hydration reaction device are also arranged in the shell, and the primary adsorption device, the carbon monoxide oxidation device and the staged hydration reaction device are sequentially connected through pipelines; the tail gas conveying pipeline between the carbon monoxide oxidation device and the staged hydration reaction device is also connected with a first cooling device and a first supercharging device; the staged hydration reaction device comprises a first reaction kettle, a second reaction kettle and a third reaction kettle which are sequentially connected through a tail gas conveying pipeline.
2. The gas hydrate method-based automobile exhaust purification system according to claim 1, wherein: and a hydrogen collecting device is further connected to a tail gas conveying pipeline between the carbon monoxide oxidation device and the first cooling device.
3. The gas hydrate method-based automobile exhaust purification system according to claim 1, wherein: and one-way valves are arranged on tail gas conveying pipelines between the first cooling device and the first supercharging device, between the first reaction kettle and the second reaction kettle, between the second reaction kettle and the third reaction kettle and behind the third reaction kettle.
4. The gas hydrate method-based automobile exhaust purification system according to claim 1, wherein: and the second reaction kettle is connected with a second cooling device through a pipeline.
5. The gas hydrate method-based automobile exhaust purification system according to claim 1, wherein: and the third reaction kettle is connected with a second supercharging device through a pipeline.
6. The gas hydrate method-based automobile exhaust purification system according to claim 1, wherein: stirring devices are arranged in the first reaction kettle, the second reaction kettle and the third reaction kettle.
7. The gas hydrate method-based automobile exhaust purification system according to claim 1, wherein: and a gas detection device is arranged on the tail gas conveying pipeline behind the third reaction kettle.
8. A method for purifying automobile exhaust based on a gas hydrate method is characterized in that the automobile exhaust purifying system based on the gas hydrate method in claim 1 is used for purifying automobile exhaust and then discharging the automobile exhaust.
9. A method for purifying automobile exhaust based on a gas hydrate method is characterized in that: the same compound accelerant is added into the first reaction kettle, the second reaction kettle and the third reaction kettle, and each reaction kettle can carry out hydration reaction on carbon dioxide, formaldehyde and sulfur dioxide.
10. A method for purifying automobile exhaust based on a gas hydrate method is characterized in that: different single promoters are added into the first reaction kettle, the second reaction kettle and the third reaction kettle, and the single promoter specifically promotes the hydration reaction with water aiming at one of carbon dioxide, formaldehyde and sulfur dioxide.
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