CN111437696A - Containing NOxExhaust gas treatment system - Google Patents
Containing NOxExhaust gas treatment system Download PDFInfo
- Publication number
- CN111437696A CN111437696A CN202010384866.2A CN202010384866A CN111437696A CN 111437696 A CN111437696 A CN 111437696A CN 202010384866 A CN202010384866 A CN 202010384866A CN 111437696 A CN111437696 A CN 111437696A
- Authority
- CN
- China
- Prior art keywords
- gas
- absorption tower
- tower
- treatment system
- exhaust gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—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 absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/0462—Temperature swing adsorption
-
- 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
- B01D53/14—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 absorption
- B01D53/1406—Multiple stage absorption
-
- 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
- B01D53/14—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 absorption
- B01D53/1418—Recovery of products
-
- 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
- B01D53/14—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 absorption
- B01D53/1431—Pretreatment by other processes
- B01D53/145—Pretreatment by separation of solid or liquid material
-
- 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
- B01D53/14—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 absorption
- B01D53/1456—Removing acid components
-
- 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
- B01D53/14—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 absorption
- B01D53/1493—Selection of liquid materials for use as absorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/10—Inorganic absorbents
- B01D2252/103—Water
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/404—Nitrogen oxides other than dinitrogen oxide
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The invention discloses a method for preparing a catalyst containing NOxAn exhaust treatment system, comprising: an absorption tower for absorbing NO in the input exhaust gasxAnd the tail gas and the dilute nitric acid are output from the tower, and part or all of the absorption liquid adopted by the tail gas and the dilute nitric acid comes from the input process water; and the temperature swing adsorption device is used for adsorbing NO in the tail gas discharged by the towerxAnd outputting purified gas up to the standard, and adsorbing NO with regenerated gasxDesorbing and outputting the desorbed gas for returning to the absorption tower. In the present invention, water can be used for absorbing NOxWaste gas is used to prepare high-concentration by-product dilute nitric acid, the concentration of dilute nitric acid can reach above 50%, the treated gas can reach the standard emission, and NO is containedxContent of emissions<50mg/Nm3。
Description
Technical Field
The invention relates to the technical field of chemical formula, in particular to a compound containing NOxAn exhaust gas treatment system.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
NOx(Nitrogen oxides) not only stimulate the respiratory system of humansIt damages animals and plants, destroys the ozone layer, and is also one of the main substances causing greenhouse effect, acid rain, and photochemical reaction. Worldwide to NOxHas strict emission limit requirements and contains NOxExhaust gas treatment is of particular interest to all industries. High concentration of NO produced in various industriesxIn the exhaust gas or exhaust gas of (2), NOxAre different in composition and usually contain some other components than air. For different compositions containing NOxExhaust gas, the inventors know that both the lye absorption method and the water absorption method are capable of absorbing NO to some extentxAnd converts it to other by-products. However, the inventor has recognized that the alkali liquor absorption method has the disadvantages of long flow path, complicated operation, etc., and the by-product sodium nitrite is a toxic substance; the water absorption process having NOxLow absorption capacity and tail gas NOxThe content does not reach the standard, and the concentration of the by-product dilute sulfuric acid is low, so the method is difficult to be applied in industry.
Disclosure of Invention
The present invention has been made in view of the above problems, and provides a method for producing a NO-containing materialxExhaust gas treatment system using water for absorbing NOxWaste gas and obtain high-concentration by-product dilute nitric acid.
The invention discloses a method for preparing a catalyst containing NOxAn exhaust treatment system, comprising:
an absorption tower for absorbing NO in the input exhaust gasxAnd the tail gas and the dilute nitric acid are output from the tower, and part or all of the absorption liquid adopted by the tail gas and the dilute nitric acid comes from the input process water; and
temperature swing adsorption device for adsorbing NO in tail gas discharged by towerxAnd outputting purified gas up to the standard, and adsorbing NO with regenerated gasxDesorbing and outputting the desorbed gas for returning to the absorption tower.
Further, the absorption tower is connected with a condenser for pretreating the waste gas, condensing water vapor therein and outputting NO dissolved thereinxTo condense water. For example, when NO is dissolved in condensed water2In this case, the condensed water contains dilute nitric acid.
Furthermore, the waste gas is pressurized by a booster fan and then is input into the condenser.
Further, the absorption liquid is partially from the condensed water.
Further, the spraying position of the process water in the absorption tower is higher than the spraying position of the condensed water, and the air inlet position of the waste gas in the absorption tower is higher than the air inlet position of the desorption gas.
Furthermore, the absorption tower is connected with a circulating water cooling device, a plurality of tower trays are arranged in the absorption tower, and the circulating water cooling device is arranged between the tower trays in a cooling coil form.
Furthermore, a bleaching tower integrated with the absorption tower is arranged below the absorption tower and is used for bleaching the dilute nitric acid discharged from the absorption tower.
Further, the regeneration gas is derived from normal pressure air and/or the purge gas.
Furthermore, a connecting pipeline with a flow valve is arranged between the conveying pipeline of the purified gas and the conveying pipeline of the regeneration gas.
Further, the condensed water and the desorption gas are respectively conveyed to the absorption tower through a circulating pump and a circulating fan, and the purified gas is emptied through an exhaust funnel.
By comprehensively adopting the technical scheme, the invention can obtain the following beneficial effects:
1. can replace alkali liquor absorption method to treat waste gas, and is suitable for different compositions of NO-containingxWaste gas recovery for reuse, e.g. waste gas treatment in existing nitric acid plants by medium-or low-pressure processes, by absorbing NO with waterxThe dilute nitric acid is directly byproduct, and the concentration of the dilute nitric acid can reach more than 50%.
2. Can be based on different NO and NO in the exhaust gas2The proportion is designed to meet the requirement of oxidation degree and improve NOxThe tail gas discharged from the tower enters a temperature swing adsorption device to recover the unabsorbed NOxReturning the gas to the absorption tower for continuous absorption to increase the yield of dilute nitric acid, and discharging the purified gas to standard, wherein NO is containedxContent of emissions<50mg/Nm3。
3. In a broader NOxIn the gas concentration range, even up to more than 30%, the invention can be applied to make NO containedxThe waste gas is effectively purified and recovered, and the low concentration NO can be treatedxThe waste gas can be mixed with NO-containing gas produced by conventional nitric acid plantxThe gas compositions are the same or similar.
4. The treatable exhaust gas may contain other constituents, such as CO2Or other inert gas components, are not affected by side reactions that may occur in conventional processing systems.
5. Can realize stable continuous production, simple flow, high automation degree and convenient operation.
Drawings
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is some examples of NO-containingxSchematic of an exhaust treatment system.
Description of reference numerals:
1-booster fan, 2-temperature swing adsorption device, 3-exhaust cylinder, 4-condenser, 5-circulating pump, 6-circulating fan, 7-absorption tower, 8-bleaching tower and 9-circulating cooling device.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.
In the description of the present invention, it is to be understood that the terms indicating an orientation or positional relationship are based on the orientation or positional relationship shown in the drawings only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the drawings of the present invention, it should be understood that different technical features which are not mutually substituted are shown in the same drawing only for the convenience of simplifying the drawing description and reducing the number of drawings, and the embodiment described with reference to the drawings does not indicate or imply that all the technical features in the drawings are included, and thus the present invention is not to be construed as being limited thereto.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
As shown in figure 1, the invention discloses a catalyst containing NOxAn exhaust gas treatment system comprising an absorption column 7 and a temperature swing adsorption unit 2. Wherein the absorption tower 7 is used for absorbing NO in the input exhaust gasxAnd the tail gas and the dilute nitric acid are output from the tower, and part or all of the absorption liquid adopted by the tail gas and the dilute nitric acid comes from the input process water; the temperature swing adsorption device 2 is used for adsorbing NO in tail gas discharged by the towerxAnd outputting purified gas up to the standard, and adsorbing NO with regenerated gasxDesorbs and outputs the desorbed gas for return to the absorption tower 7. For different compositions containing NOxThe waste gas, the different temperature swing adsorption units 2 are provided as conventional prior art, and the detailed structure of the temperature swing adsorption unit is not described again.
The system can make NO contained by using temperature swing adsorption carried out in the temperature swing adsorption device 2xThe exhaust gas emission reaches the standard, and the desorbed gas is returned to the absorption tower 7, so that NO in the absorption tower 7 can be effectively improvedxAnd the concentration of the by-product dilute nitric acid is further improved.
When the waste gas contains water vapor, the waste gas can be removed by condensation before being input into the absorption tower 7, the method has multiple beneficial effects that the water vapor in the waste gas can be effectively removed, the heat input into the absorption tower 7 can be reduced, and part of NO can be dissolved in the condensed water in advance before the waste gas is input into the absorption tower 7x. In some embodiments, the absorber tower 7 is coupled to a condenser 4 for pretreating the flue gas to condense water vapor therein and output NO dissolved thereinxTo condense water.
Condensed water with part of NO dissolved thereinxWhen it is used in conjunction with process water for the absorption of NOxIn time, the yield of the dilute nitric acid can be effectively improved, and the water resource consumption can be reduced. In some embodiments, the absorption liquid is derived in part from condensed water.
In some embodiments, the spraying position of the process water in the absorption tower 7 is higher than that of the condensed water, and the intake position of the exhaust gas in the absorption tower 7 is higher than that of the desorbed gas. The flowing directions of the waste gas and the absorption liquid in the absorption tower 7 are opposite, and when the concentration distribution of the nitric acid in the absorption liquid is gradually reduced along the flowing direction of the waste gas, a better absorption effect can be realized.
In some embodiments, a circulating water cooling device 9 is disposed in the absorption tower 7 for removing heat in the absorption tower 7 and improving absorption capacity of the absorption liquid. In at least one embodiment, a plurality of trays are provided in the absorption column, and the circulating water cooling device 9 is provided between the trays in the form of cooling coils.
In some embodiments, a bleaching tower 8 is connected to absorption tower 7 for bleaching dilute nitric acid discharged from said absorption tower 7. In at least one embodiment, bleach tower 8 is located below absorber 7 and is integral with absorber 7. NO produced in bleaching tower 8xThe NO is discharged upwards and enters the absorption tower 7 to be absorbed continuously, and NO can be realizedxThe effective utilization of the water is realized.
In some embodiments, the regeneration gas is NO at a pressurexGas with content not exceeding standard. In at least one embodiment, the regeneration gas is derived from ordinary pressure air output by the air compressor. In addition at leastIn one embodiment, the regeneration gas is derived from the purge gas described above. In some embodiments, the regeneration gas is a mixture of normal pressure air and said purge gas, and a connection line with a flow valve is provided between said purge gas supply line and said regeneration gas supply line.
As some of the aids in the system, in some embodiments, the waste gas is pressurized by a booster fan 1 and then fed to a condenser 4, the condensed water and desorbed gas are fed to an absorption tower 7 by a circulation pump 5 and a circulation fan 6, respectively, and the purified gas is evacuated by an exhaust stack 3.
In at least one embodiment, as shown in fig. 1, the waste gas is pressurized and cooled, and then sent to the absorption tower 7 to be absorbed, and the condensed water produced in the cooling process is sent to the absorption tower 7 to be used as absorption liquid. Then, NO not absorbed in the absorption tower 7 is adsorbed by the temperature swing adsorption device 2xAnd returned to the absorption tower 7 again for reuse. The absorption tower 7 is operated in a certain range of medium-low pressure, and the concentration of the obtained by-product dilute nitric acid can reach more than 50%. The tail gas discharged from the tower is adsorbed by a temperature swing adsorption device 2 to remove NOxAfter then, NOxConcentration of<50mg/Nm3The waste gas can be discharged after reaching the standard and is exhausted through the exhaust funnel 3.
At least one exemplary embodiment is now provided in connection with the drawings, a detailed description of which is provided in the drawings not intended to limit the scope of the claimed invention, but is merely representative of exemplary embodiments provided in the invention.
In the present exemplary embodiment, NO is containedxThe volume composition of the exhaust gas is as follows:
containing NO of the above compositionxExhaust gas containing NO at a concentration of about 35% by volume2And air (N)2，O2) And a small amount of CO2And is pressurized to a certain pressure by a booster 1, and then is sent to an absorption tower 7 after being cooled.
In the absorption tower 7, using a certain quantityThe process water is supplemented with a certain amount of condensed water to absorb NO in the waste gasxAnd dilute nitric acid is generated. The heat in the absorption tower is removed by a conventional circulating water cooling device 9. Dilute nitric acid produced by the absorption tower 7 directly flows into a bleaching tower 8 below the absorption tower 7, and a small amount of air is utilized to remove NO in the dilute nitric acidxThen, the by-product dilute nitric acid with the concentration of about 52 percent is obtained. The absorption tower 7 can be operated at a lower pressure of 2-5 bar and also can be operated at a higher pressure. The design of the oxidation space for handling a certain amount of gas at different pressures may also vary.
NO in tower exhaust tail gasxThe concentration is still high, about 1000 to 3000PPM, and the mixture is sent to a temperature swing adsorption device 2, most NOxAdsorbed, small amount of CO2And also adsorbed, and the output purified water reaches the emission standard and is discharged to the atmosphere through the exhaust funnel 3. Purifying NO in gasx<50mg/Nm3Containing non-adsorbed air and most of the CO2。
A certain amount of regeneration gas is sent to the temperature swing adsorption device 2, and the adsorbed NOxDesorbing, and returning the desorbed gas to the absorption tower 7 for continuous absorption after the desorbed gas is pressurized by the circulating fan 6 so as to increase the yield of the dilute nitric acid. Wherein a small amount of CO2The gas is also desorbed and circulated through the system.
Exemplary embodiment 2
In the present exemplary embodiment, NO is containedxThe volume composition of the exhaust gas is as follows:
containing NO of the above compositionxExhaust gas containing NO at a concentration of about 38% by volume221% NO, oxygen and moisture, are pressurized to a certain pressure (e.g. 3.5BAR) by a booster and then sent to the absorption tower after cooling.
Absorbing NO in the exhaust gas in an absorption tower 7 by using a certain amount of process water and a certain amount of condensed waterxAnd dilute nitric acid is generated. The heat in the absorption tower 7 is removed by a conventional circulating water cooling device 9. Dilute nitric acid produced by the absorption tower 7 directly flows into a bleaching tower 8 below the absorption tower 7, andremoval of NO from dilute nitric acid with small amount of airxThen, the by-product dilute nitric acid with the concentration of about 56 percent is obtained. The absorption tower 7 can be operated at a lower pressure of 2-5 bar and also can be operated at a higher pressure. The design of the oxidation space for handling a certain amount of gas at different pressures may also vary.
NO in tower exhaust tail gasxThe concentration is still high, about 1000 to 2000PPM, and the mixture is sent to a temperature swing adsorption device 2, and most NOxAdsorbed, small amount of CO2And also adsorbed, and the output purified water reaches the emission standard and is discharged to the atmosphere through the exhaust funnel 3. Purifying NO in gasx<50mg/Nm3Containing non-adsorbed air and most of the CO2。
A certain amount of regeneration gas is sent to the temperature swing adsorption device 2, and the adsorbed NOxDesorbing, and returning the desorbed gas to the absorption tower 7 for continuous absorption after the desorbed gas is pressurized by the circulating fan 6 so as to increase the yield of the dilute nitric acid. Wherein a small amount of CO2The gas is also desorbed and circulated through the system.
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. For example, different compositions of off-gases, varying pressure ranges of operating towers, etc., should not be construed as limiting the present invention.
The invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed.
Claims (10)
1. Containing NOxAn exhaust treatment system, comprising:
an absorption tower for absorbing NO in the input exhaust gasxAnd the tail gas and the dilute nitric acid are output from the tower, and part or all of the absorption liquid adopted by the tail gas and the dilute nitric acid comes from the input process water; and
temperature swing adsorption device for adsorbing NO in tail gas discharged by towerxAnd output the purification up to the standardGas, and the use of regeneration gas to adsorb NOxDesorbing and outputting the desorbed gas for returning to the absorption tower.
2. The NO-containing of claim 1xAn exhaust gas treatment system, characterized by: the absorption tower is connected with a condenser for pretreating the waste gas, condensing water vapor in the waste gas and outputting NO dissolved in the water vaporxTo condense water.
3. The NO-containing of claim 2xAn exhaust gas treatment system, characterized by: and the waste gas is pressurized by a booster fan and then is input into the condenser.
4. The NO-containing of claim 2xAn exhaust gas treatment system, characterized by: the absorption liquid is partially from the condensed water.
5. The NO-containing of claim 4xAn exhaust gas treatment system, characterized by: the spraying position of the process water in the absorption tower is higher than the spraying position of the condensed water, and the air inlet position of the waste gas in the absorption tower is higher than the air inlet position of the desorption gas.
6. The NO-containing of claim 5xAn exhaust gas treatment system, characterized by: the absorption tower is connected with a circulating water cooling device, a plurality of tower trays are arranged in the absorption tower, and the circulating water cooling device is arranged between the tower trays in a cooling coil form.
7. The NO-containing according to any one of claims 1 to 6xAn exhaust gas treatment system, characterized by: and a bleaching tower which is integrated with the absorption tower is arranged below the absorption tower and is used for bleaching the dilute nitric acid discharged from the absorption tower.
8. The NO-containing according to any one of claims 1 to 6xAn exhaust gas treatment system, characterized by: the regenerated gasThe body is derived from ordinary pressure air and/or said purge gas.
9. The NO-containing of claim 8xAn exhaust gas treatment system, characterized by: and a connecting pipeline with a flow valve is arranged between the purified gas conveying pipeline and the regeneration gas conveying pipeline.
10. The NO-containing according to any one of claims 1 to 6xAn exhaust gas treatment system, characterized by: and the condensed water and the desorbed gas are respectively conveyed to the absorption tower through a circulating pump and a circulating fan, and the purified gas is emptied through an exhaust funnel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010384866.2A CN111437696A (en) | 2020-05-09 | 2020-05-09 | Containing NOxExhaust gas treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010384866.2A CN111437696A (en) | 2020-05-09 | 2020-05-09 | Containing NOxExhaust gas treatment system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111437696A true CN111437696A (en) | 2020-07-24 |
Family
ID=71654965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010384866.2A Withdrawn CN111437696A (en) | 2020-05-09 | 2020-05-09 | Containing NOxExhaust gas treatment system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111437696A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112516740A (en) * | 2020-11-06 | 2021-03-19 | 瑞必科净化设备（上海）有限公司 | Tail gas deamination process |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08299758A (en) * | 1995-05-11 | 1996-11-19 | Mitsubishi Heavy Ind Ltd | Method for removing nitrogen oxide and device therefor |
| CN1242252A (en) * | 1999-06-18 | 2000-01-26 | 化学工业部西南化工研究设计院 | Removing and recovering nitrogen oxide(s) by adsorption separation method from mixed gas contg. nitrogen oxide(s) |
| CN102068881A (en) * | 2010-12-27 | 2011-05-25 | 南京大学 | Synchronous heat exchange gas absorption tower and nitric oxide absorption and concentration process |
| US20130108534A1 (en) * | 2011-11-02 | 2013-05-02 | Ammonia Casale Sa | Method for Removing Nitrogen Oxides from Combustion Fumes with On-Site Generation of Ammonia |
| CN105214457A (en) * | 2014-06-05 | 2016-01-06 | 魏雄辉 | A kind of fume desulfuring and denitrifying Processes and apparatus |
| CN207462941U (en) * | 2017-10-18 | 2018-06-08 | 天津华景化工新技术开发有限公司 | A kind of nitric acid production blended absorbent tower |
| CN108744889A (en) * | 2018-06-19 | 2018-11-06 | 天津天清环保科技股份有限公司 | It is a kind of to absorb the VOCs waste gas processing methods being combined with absorption |
| CN110540178A (en) * | 2019-09-10 | 2019-12-06 | 中国成达工程有限公司 | Medium-pressure nitric acid production process and equipment |
| CN212492260U (en) * | 2020-05-09 | 2021-02-09 | 中国成达工程有限公司 | NOx-containing waste gas treatment system |
-
2020
- 2020-05-09 CN CN202010384866.2A patent/CN111437696A/en not_active Withdrawn
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08299758A (en) * | 1995-05-11 | 1996-11-19 | Mitsubishi Heavy Ind Ltd | Method for removing nitrogen oxide and device therefor |
| CN1242252A (en) * | 1999-06-18 | 2000-01-26 | 化学工业部西南化工研究设计院 | Removing and recovering nitrogen oxide(s) by adsorption separation method from mixed gas contg. nitrogen oxide(s) |
| CN102068881A (en) * | 2010-12-27 | 2011-05-25 | 南京大学 | Synchronous heat exchange gas absorption tower and nitric oxide absorption and concentration process |
| US20130108534A1 (en) * | 2011-11-02 | 2013-05-02 | Ammonia Casale Sa | Method for Removing Nitrogen Oxides from Combustion Fumes with On-Site Generation of Ammonia |
| CN105214457A (en) * | 2014-06-05 | 2016-01-06 | 魏雄辉 | A kind of fume desulfuring and denitrifying Processes and apparatus |
| CN207462941U (en) * | 2017-10-18 | 2018-06-08 | 天津华景化工新技术开发有限公司 | A kind of nitric acid production blended absorbent tower |
| CN108744889A (en) * | 2018-06-19 | 2018-11-06 | 天津天清环保科技股份有限公司 | It is a kind of to absorb the VOCs waste gas processing methods being combined with absorption |
| CN110540178A (en) * | 2019-09-10 | 2019-12-06 | 中国成达工程有限公司 | Medium-pressure nitric acid production process and equipment |
| CN212492260U (en) * | 2020-05-09 | 2021-02-09 | 中国成达工程有限公司 | NOx-containing waste gas treatment system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112516740A (en) * | 2020-11-06 | 2021-03-19 | 瑞必科净化设备（上海）有限公司 | Tail gas deamination process |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110833754B (en) | Device for absorbing ethylene oxide waste gas and method for treating ethylene oxide waste gas | |
| CN100337724C (en) | Denitrification method | |
| TW200808432A (en) | Ozone production processes and its use in industrial processes | |
| CN105597535A (en) | Method for treating mixed organic waste gas containing chlorine, hydrogen chloride and oxynitride | |
| JP5133688B2 (en) | Cu-ZSM5 zeolite shaped adsorbent, its activation method, temperature fluctuation type adsorption device, and gas purification method | |
| CN1297473C (en) | Gas refining method and device | |
| CN102688671B (en) | Synthesis method for removing nitric oxide in flue gas | |
| CN112933915A (en) | Nitrogen oxide waste gas recycling treatment device and method | |
| CN1083877C (en) | Process for producing petrochemicals | |
| CN212492260U (en) | NOx-containing waste gas treatment system | |
| CN109173598B (en) | Method for recovering CS in viscose waste gas by using composite solvent2Method (2) | |
| CN111603886B (en) | A NOx recovery method and device for three-tower switching mode | |
| KR101812532B1 (en) | Purification process of nitrous oxide | |
| CN110743316A (en) | Waste gas treatment process and device in spandex production process | |
| JP5222327B2 (en) | Gas separation method and apparatus | |
| CN111437696A (en) | Containing NOxExhaust gas treatment system | |
| CN206008364U (en) | A kind of volatility organic tail gas processing meanss | |
| JP4850384B2 (en) | Method for removing methanol from waste gas | |
| CN110538570B (en) | N in caprolactam production waste gas 2 O and VOC co-processing system and method | |
| CN111333032A (en) | Environment-friendly recovery method of hydrogen chloride tail gas in chlorothalonil production | |
| CN112957891B (en) | Method for recycling nitrogen oxide waste gas in noble metal purification process | |
| US8491844B2 (en) | Scrubbing a gas containing nitrogen oxides | |
| EP0590744B1 (en) | Method for recovering ammonia adsorbent | |
| KR101596150B1 (en) | Fluorine compound gas Treatment method and equipment using the same | |
| JP2004161503A (en) | Gas purification method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200724 |
|
| WW01 | Invention patent application withdrawn after publication |