CN108816000B - Resourceful treatment method for purifying air polluted by hydrogen sulfide and ammonia gas by using plasma - Google Patents
Resourceful treatment method for purifying air polluted by hydrogen sulfide and ammonia gas by using plasma Download PDFInfo
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- CN108816000B CN108816000B CN201810612480.5A CN201810612480A CN108816000B CN 108816000 B CN108816000 B CN 108816000B CN 201810612480 A CN201810612480 A CN 201810612480A CN 108816000 B CN108816000 B CN 108816000B
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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
- B01D53/22—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 diffusion
- B01D53/228—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 diffusion characterised by specific membranes
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- 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
- B01D53/32—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 electrical effects other than those provided for in group B01D61/00
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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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8603—Removing sulfur compounds
- B01D53/8612—Hydrogen sulfide
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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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8634—Ammonia
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/24—Sulfates of ammonium
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D2259/818—Employing electrical discharges or the generation of a plasma
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- 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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- 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
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- 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
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
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Abstract
The invention relates to a resourceful treatment method for purifying air polluted by hydrogen sulfide and ammonia gas by using plasma, which is characterized by comprising the following steps of: 1) separating hydrogen sulfide from ammonia gas in a separator; 2) introducing the air containing hydrogen sulfide treated in the step 1) into a plasma device for oxidation reaction to generate sulfur-containing oxide, introducing the sulfur-containing oxide and the air containing ammonia treated in the step 1) into a chemical synthesis chamber, reacting ammonia gas in the chemical synthesis chamber with the sulfur-containing oxide to generate ammonium sulfate aerosol, and purifying polluted air into purified air; 3) introducing the mixture of the ammonium sulfate aerosol treated in the step 2) and the purified air into a separation chamber, and separating the ammonium sulfate aerosol from the purified air. The invention converts the hydrogen sulfide and ammonia gas in the polluted air into ammonium sulfate aerosol, so that the polluted air is purified without generating secondary pollution, the generated ammonium sulfate aerosol can be used as a chemical fertilizer, the purpose of recycling is achieved, and the operation cost of equipment is reduced.
Description
Technical Field
The invention belongs to the technical field of environmental protection and waste gas purification, and particularly relates to a resourceful treatment method for purifying air polluted by hydrogen sulfide and ammonia gas by using plasma.
Background
The polluted air containing hydrogen sulfide and ammonia gas mainly comes from the fermentation process of animal and plant carcasses, the fermentation process of animal excrement and the like. The polluted air containing hydrogen sulfide and ammonia gas discharged into the atmosphere not only damages human health and causes respiratory system diseases, but also pollutes the atmospheric environment, causes secondary aerosol and causes haze weather. At present, the methods for treating the polluted air containing hydrogen sulfide and ammonia mainly comprise a chemical absorption method, a catalytic oxidation method, an adsorbent adsorption method and a biodegradation method, and the methods have higher operation cost when dealing with the polluted air containing hydrogen sulfide and ammonia with low concentration and large air volume, are difficult to completely purify the polluted air containing hydrogen sulfide and ammonia, and are easy to cause secondary pollution.
The invention provides a purification and resource treatment method of air polluted by hydrogen sulfide and ammonia gas, which comprises the following steps: firstly, separating and separating hydrogen sulfide and ammonia gas in a separator to obtain hydrogen sulfide, carrying out a plasma reaction and an oxidation reaction to obtain sulfur-containing oxides, and carrying out a chemical synthesis reaction on the generated sulfur-containing oxides and the ammonia gas to obtain ammonium sulfate aerosol so as to purify polluted air containing the hydrogen sulfide and the ammonia gas; next, the generated ammonium sulfate aerosol is separated from the purified air, so that the generated ammonium sulfate aerosol is collected for resource utilization, and the purified air is discharged to the atmosphere through an exhaust pipeline. In the invention, the hydrogen sulfide and the ammonia gas in the polluted air containing the hydrogen sulfide and the ammonia gas are converted into the ammonium sulfate aerosol, so that the air is purified to eliminate secondary pollution, the hydrogen sulfide and the ammonia gas can be recycled, and the running cost of equipment is reduced.
Disclosure of Invention
The invention provides a recycling treatment method for purifying polluted air containing hydrogen sulfide and ammonia gas by using plasma, which aims to solve the problems that the existing method for treating the polluted air containing hydrogen sulfide and ammonia gas is high in operation cost, difficult to completely purify, easy to cause secondary pollution and the like.
A resourceful treatment method for purifying air polluted by hydrogen sulfide and ammonia gas by using plasma comprises the following steps:
s1, separating hydrogen sulfide and ammonia gas in a separator;
s2, feeding the polluted air containing hydrogen sulfide treated in the step S1 into a plasma device for oxidation reaction to generate sulfur-containing oxide, feeding the generated sulfur-containing oxide into a chemical synthesis chamber, feeding the air containing ammonia treated in the step S1 into the chemical synthesis chamber, reacting ammonia gas in the chemical synthesis chamber with the sulfur-containing oxide to generate ammonium sulfate aerosol, and purifying the polluted air into purified air;
and S3, enabling the mixture of the ammonium sulfate aerosol obtained through the treatment in the step S2 and the purified air to enter a separation chamber, separating the ammonium sulfate aerosol from the purified air, collecting the ammonium sulfate aerosol for resource utilization, and discharging the purified air into the atmosphere through an exhaust pipeline.
Preferably, the separator in the step S1 is a membrane separator, a condensation separator or a pressure swing separator.
Preferably, the polluted air in the step S1 contains one or both of ozone and hydrogen peroxide.
Preferably, the plasma device in step S2 is one or more of a creeping discharge device, a corona discharge device, a dielectric barrier discharge device, and an arc discharge device.
Preferably, the plasma device in step S2 is provided with a catalyst, the catalyst is in the shape of one or more of a sphere, a cylinder, a cuboid or a cube, and the catalyst is a noble metal such as gold, silver, palladium, platinum, or the like, or a metal oxide such as iron oxide, copper oxide, aluminum oxide, chromium oxide, magnesium oxide, zinc oxide, titanium oxide, zirconium oxide, chromium oxide, nickel oxide, or the like, or a composite of the noble metal and the metal oxide.
Preferably, the energy density of plasma in the plasma oxidation device of the step S2 is 0.2-10J/L, the residence time is 1-10S, and the reaction temperature is-10-100 ℃.
More preferably, the energy density of the plasma in the plasma oxidation device in the step S2 is 2-6J/L, the residence time is 1-5S, and the reaction temperature is 30-60 ℃.
Preferably, the chemical synthesis reaction chamber of step S2 is composed of a catalytic oxidation device, a thermodynamic combustion device, a plasma oxidation device, a mixer, an absorption tower or an adsorption tower.
Preferably, the reaction temperature in the chemical synthesis reaction chamber of the step S2 is-20-80 ℃, the retention time is 2-20S, and the pressure is 0.3-2 bar.
More preferably, in the step S2, the reaction temperature in the chemical synthesis reaction chamber is 20-60 ℃, the residence time is 2-15S, and the pressure is 0.5-1.5 bar.
Preferably, the separation chamber in the step S3 is composed of a filtering device, an electrostatic dust removal device and an absorption tower.
Preferably, the reaction temperature in the separation chamber in the step S3 is-20-80 ℃, the retention time is 2-20S, and the pressure is 0.3-2 bar.
More preferably, the reaction temperature in the separation chamber in the step S3 is 30-60 ℃, the retention time is 5-15S, and the pressure is 1-1.5 bar.
The principle of the invention is as follows: the generated sulfur-containing oxide and the ammonia gas in the air polluted by the hydrogen sulfide and the ammonia gas are further chemically synthesized into ammonium sulfate aerosol in a reactor, the generated ammonium sulfate aerosol and the purified air are separated in a separation chamber, and the ammonium sulfate aerosol is collected to be used as a chemical fertilizer.
The invention has the beneficial effects that:
the method of the invention oxidizes the hydrogen sulfide in the polluted air containing the hydrogen sulfide and the ammonia gas into sulfur-containing oxide, and further reacts with the ammonia gas to be converted into ammonium sulfate aerosol, so that the air is purified to eliminate secondary pollution, the hydrogen sulfide and the ammonia gas can be recycled, the running cost of equipment is reduced, and the method can be used for treating the polluted air containing the ammonia gas in intensive farms, animal harmless treatment plants dead of diseases, fertilizer plants, concrete manufacturing plants and the like.
Drawings
FIG. 1 is a schematic flow chart of a method for purifying and recycling air polluted by hydrogen sulfide and ammonia.
FIG. 2 is a flow chart of a device for treating air polluted by hydrogen sulfide and ammonia gas through membrane separation, a dielectric barrier reactor, a catalytic oxidation device and an electrostatic separator.
FIG. 3 shows the removal efficiency of hydrogen sulfide and ammonia gas by dielectric barrier discharge.
Detailed Description
The technical solution of the present invention is further specifically described below by way of specific examples in conjunction with the accompanying drawings.
The first embodiment is as follows:
fig. 1 and 2 show an example of a process for producing ammonium sulfate by oxidizing hydrogen sulfide and then reacting with ammonia gas based on dielectric barrier discharge.
(1) And (3) introducing the polluted air containing hydrogen sulfide and ammonia gas into a membrane separator for separation.
(2) The polluted air containing hydrogen sulfide enters a corona discharge plasma device, the energy density of the plasma is 0.2J/L, the reaction time is 1s, the reaction temperature is-10 ℃, and the hydrogen sulfide in the range of 100ppm is oxidized into sulfur oxide.
(3) Introducing the generated sulfur-containing oxides, the ammonia gas in the air polluted by the ammonia-containing gas treated in the step 1) and the moisture in the air polluted by the ammonia-containing gas into a catalytic oxidation device, wherein the reaction temperature is-20 ℃, the reaction time is 2s and the pressure is 0.3bar, the ammonia gas in the catalytic oxidation device reacts with the sulfur-containing oxides to generate ammonium sulfate aerosol, and the polluted air is purified into purified air.
(4) The purified air and the ammonium sulfate aerosol are separated in a separating chamber, the reaction temperature in the separating chamber is-20 ℃, the reaction time is 2s, and the pressure is 0.3bar, the purified air is discharged into the atmosphere through an exhaust pipeline, and the ammonium sulfate aerosol is collected to prepare the fertilizer.
The experimental conditions are as follows: air volume 1000m3The initial concentration of hydrogen sulfide in the polluted air of hydrogen sulfide and ammonia gas is 100ppm, the initial concentration of ammonia gas is 80ppm, and the relative humidity of air is 80%.
Example 2:
(1) and (3) the polluted air containing hydrogen sulfide, ammonia gas and ozone enters a condensation separator for separation.
(2) The polluted air containing hydrogen sulfide and ozone enters a dielectric barrier discharge device, 5g of spherical titanium oxide is added, the energy density of plasma is 5J/L, the reaction time is 5s, the reaction temperature is 55 ℃, and the hydrogen sulfide in the range of 200ppm is oxidized into sulfur-containing oxide.
(3) Introducing the generated sulfur-containing oxides, the ammonia gas in the ammonia-containing gas polluted air treated in the step 1) and the moisture in the ammonia-containing gas polluted air into a thermodynamic combustion device, wherein the reaction temperature is 30 ℃, the reaction time is 10s, and the pressure is 1bar, the ammonia gas in the thermodynamic combustion device reacts with the sulfur-containing oxides to generate ammonium sulfate aerosol, and the polluted air is purified into purified air.
(4) The purified air and the ammonium sulfate aerosol are separated in the separating chamber, the reaction temperature in the separating chamber is 55 ℃, the reaction time is 10s, and the pressure is 1.5bar, the purified air is discharged into the atmosphere through an exhaust pipeline, and the ammonium sulfate aerosol is collected to prepare the fertilizer.
Example 3:
(1) and (3) separating the polluted air containing hydrogen sulfide, hydrogen peroxide and ammonia gas in a pressure swing separator.
(2) And (3) allowing polluted air containing hydrogen sulfide and hydrogen peroxide to enter an arc discharge device, adding 8g of spherical zinc oxide, wherein the energy density of the plasma is 10J/L, the reaction time is 10s, and the reaction temperature is 100 ℃, so that hydrogen sulfide in the range of 500ppm is oxidized into sulfur-containing oxide.
(3) Introducing the generated sulfur-containing oxide, the ammonia gas in the ammonia-containing gas polluted air treated in the step 1) and the moisture in the ammonia-containing gas polluted air into a plasma oxidation device, wherein the reaction temperature is 80 ℃, the reaction time is 20s, and the pressure is 2bar, the ammonia gas in the plasma oxidation device reacts with the sulfur-containing oxide to generate ammonium sulfate aerosol, and the polluted air is purified into purified air.
(4) The purified air and the ammonium sulfate aerosol are separated in the separation chamber, the reaction temperature in the separation chamber is 80 ℃, the reaction time is 20s, and the pressure is 2bar, the purified air is discharged into the atmosphere through the exhaust pipeline, and the ammonium sulfate aerosol is collected to prepare the fertilizer.
From the results of fig. 3, it is understood that the conversion rate of hydrogen sulfide and ammonia gas increases as the energy density of plasma increases. When the oxidation rate of hydrogen sulfide is controlled at 80% and the air has a certain humidity, a large amount of ammonium sulfate fertilizer is produced.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.
Claims (8)
1. A treatment method for purifying polluted air containing hydrogen sulfide and ammonia gas by using plasma is characterized by comprising the following steps: the method comprises the following steps:
s1, introducing the polluted air containing hydrogen sulfide and ammonia gas into a separator for separation, wherein the separator is a membrane separator, a condensation separator or a pressure swing separator;
s2, feeding the polluted air containing hydrogen sulfide treated in the step S1 into a plasma device, and carrying out oxidation reaction under certain conditions to generate sulfur-containing oxides;
s3, introducing the generated sulfur-containing oxide and the ammonia-containing gas polluted air processed in the step S1 into a chemical synthesis chamber, reacting ammonia gas and the sulfur-containing oxide under a certain condition to generate ammonium sulfate aerosol, and purifying the polluted air into purified air;
and S4, feeding the mixture of the ammonium sulfate aerosol and the purified air obtained by the treatment of the step S3 into a separation chamber, and separating the ammonium sulfate aerosol and the purified air under certain conditions.
2. The treatment method for plasma purification of polluted air containing hydrogen sulfide and ammonia gas as claimed in claim 1, wherein the treatment method comprises the following steps: the plasma device in the step S2 is one or more of a creeping discharge device, a corona discharge device, a dielectric barrier discharge device and an arc discharge device.
3. The treatment method for plasma purification of polluted air containing hydrogen sulfide and ammonia gas as claimed in claim 1, wherein the treatment method comprises the following steps: a catalyst is arranged in the plasma device in the step S2, the catalyst is in the shape of one or more of a sphere, a cylinder, a cuboid or a cube, and the catalyst is gold, silver, palladium and platinum, or iron oxide, copper oxide, aluminum oxide, chromium oxide, magnesium oxide, zinc oxide, titanium oxide, zirconium oxide and nickel oxide.
4. The treatment method for plasma purification of polluted air containing hydrogen sulfide and ammonia gas as claimed in claim 1, wherein the treatment method comprises the following steps: in the step S2, the energy density of the plasma in the plasma oxidation device is 0.2-10J/L, the reaction time is 1-10S, and the reaction temperature is-10-100 ℃.
5. The treatment method for plasma purification of polluted air containing hydrogen sulfide and ammonia gas as claimed in claim 1, wherein the treatment method comprises the following steps: the chemical synthesis reaction chamber of the step S3 is a catalytic oxidation device, a thermodynamic combustion device, a plasma oxidation device, a mixer, an absorption tower or an adsorption tower.
6. The treatment method for plasma purification of polluted air containing hydrogen sulfide and ammonia gas as claimed in claim 1, wherein the treatment method comprises the following steps: the reaction temperature in the chemical synthesis reaction chamber of the step S3 is-20-80 ℃, the retention time is 2-20S, and the pressure is 0.3-2 bar.
7. The treatment method for plasma purification of polluted air containing hydrogen sulfide and ammonia gas as claimed in claim 1, wherein the treatment method comprises the following steps: the separation chamber in the step S4 is composed of a filtering device, an electrostatic dust collection device and an absorption tower.
8. The treatment method for plasma purification of polluted air containing hydrogen sulfide and ammonia gas as claimed in claim 1, wherein the treatment method comprises the following steps: the reaction temperature in the separation chamber in the step S4 is-20-80 ℃, the retention time is 2-20S, and the pressure is 0.3-2 bar.
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| US11708267B2 (en) * | 2020-12-18 | 2023-07-25 | Uop Llc | Process for managing hydrogen sulfide in a refinery |
| CN116440662A (en) * | 2023-03-16 | 2023-07-18 | 上海城投老港基地管理有限公司 | Method for separating and purifying ammonia gas in ammonia-containing mixed waste gas by using membrane |
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| CN86108433A (en) * | 1985-12-20 | 1987-07-29 | 标准石油公司 | Polymer/liquid crystal composition semi-permeable membranes and using method thereof |
| CN1562445A (en) * | 2004-03-29 | 2005-01-12 | 广东杰特科技发展有限公司 | Method of synchronous cleansing air pollutant by smoke of plasma discharge caused by spreading light |
| WO2016012309A1 (en) * | 2014-07-21 | 2016-01-28 | Airpack Holding B.V. | Method for upgrading biogas and production of ammonium sulphate |
| CN106861395A (en) * | 2017-03-09 | 2017-06-20 | 秦皇岛领先康地农业技术有限公司 | It is a kind of for the oxidization processing system waste gas produced in feces of livestock and poultry harmless treatment |
| CN108057327A (en) * | 2017-12-15 | 2018-05-22 | 浙江工商大学 | A kind of purification of pollution air containing ammonia and recycling processing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86108433A (en) * | 1985-12-20 | 1987-07-29 | 标准石油公司 | Polymer/liquid crystal composition semi-permeable membranes and using method thereof |
| CN1562445A (en) * | 2004-03-29 | 2005-01-12 | 广东杰特科技发展有限公司 | Method of synchronous cleansing air pollutant by smoke of plasma discharge caused by spreading light |
| WO2016012309A1 (en) * | 2014-07-21 | 2016-01-28 | Airpack Holding B.V. | Method for upgrading biogas and production of ammonium sulphate |
| CN106861395A (en) * | 2017-03-09 | 2017-06-20 | 秦皇岛领先康地农业技术有限公司 | It is a kind of for the oxidization processing system waste gas produced in feces of livestock and poultry harmless treatment |
| CN108057327A (en) * | 2017-12-15 | 2018-05-22 | 浙江工商大学 | A kind of purification of pollution air containing ammonia and recycling processing method |
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Denomination of invention: A resource utilization method for plasma purification of air contaminated with hydrogen sulfide and ammonia gas Granted publication date: 20201016 Pledgee: Bank of Jiangsu Limited by Share Ltd. Hangzhou branch Pledgor: HANGZHOU XINGYANG ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. Registration number: Y2024980037977 |