CN112473319A - Tail gas treatment system and tail gas treatment method - Google Patents
Tail gas treatment system and tail gas treatment method Download PDFInfo
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- CN112473319A CN112473319A CN202011384209.4A CN202011384209A CN112473319A CN 112473319 A CN112473319 A CN 112473319A CN 202011384209 A CN202011384209 A CN 202011384209A CN 112473319 A CN112473319 A CN 112473319A
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- adsorbent
- catalytic combustion
- gas treatment
- exhaust gas
- tail gas
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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
- B01D53/02—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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
- F23G7/07—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases in which combustion takes place in the presence of catalytic material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
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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
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0258—Other waste gases from painting equipments or paint drying installations
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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
Abstract
The invention discloses a tail gas treatment system and a tail gas treatment method, and the technical scheme is that the treatment system comprises a plurality of adsorption chambers, wherein an adsorbent for adsorbing organic gas is arranged in each adsorption chamber; and a catalytic combustor for desorbing the organic gas adsorbed in the adsorbent from the adsorbent and catalytically combusting the desorbed organic gas in the combustor; the processing method comprises the following steps: s1, tail gas adsorption; s2, tail gas desorption; s3, catalytic combustion; filtering organic gas in the tail gas in an adsorbent filtering mode, discharging clean air, enabling the organic gas adsorbed on the adsorbent to be desorbed from the adsorbent by the catalytic combustion chamber when the adsorbent is fully adsorbed with the organic gas, then entering the catalytic combustion chamber, carrying out catalytic combustion in the catalytic combustion chamber, decomposing the organic gas into carbon dioxide and water, and then discharging the carbon dioxide and water out of the catalytic combustion chamber; the organic gas is thoroughly treated without leaving residues.
Description
Technical Field
The invention relates to the technical field of paint spraying tail gas treatment, in particular to a tail gas treatment system and a tail gas treatment method.
Background
When the work piece is spraying paint, need through spraying, levelling and stoving operation, in the middle of the process of spraying, levelling and stoving, various harmful substance in the middle of the paint can disperse in the air, is mainly organic gas in the middle of the harmful substance, if directly will these air discharge can cause serious pollution with the environment around ground, consequently, in the middle of the process that the work piece sprays paint, all need handle the tail gas that produces in the middle of the paint spraying process.
In the prior art, when tail gas is treated, harmful substances in the air are mostly filtered out in a filtering mode, and then the filtered clean gas is discharged into the air. However, the existing treatment method only filters out harmful substances, and cannot completely treat the harmful substances.
Disclosure of Invention
In view of the disadvantages of the prior art, an object of the present invention is to provide a tail gas treatment system and a tail gas treatment method, which can thoroughly treat organic gases without leaving residues.
In order to achieve the purpose, the invention provides the following technical scheme: a tail gas treatment system comprises a plurality of adsorption chambers, a plurality of gas separation chambers and a plurality of gas separation chambers, wherein the adsorption chambers are internally provided with adsorbents for adsorbing organic gas;
and a catalytic combustor for desorbing the organic gas adsorbed in the adsorbent from the adsorbent and catalytically combusting the desorbed organic gas in the combustor.
By adopting the technical scheme, organic gas in tail gas is filtered by the adsorbent in a filtering mode, clean air is discharged, when the adsorbent is fully adsorbed with the organic gas, the organic gas adsorbed on the adsorbent is desorbed from the adsorbent by the catalytic combustion chamber and then enters the catalytic combustion chamber, catalytic combustion is carried out in the catalytic combustion chamber, the organic gas is decomposed into carbon dioxide and water, and then the carbon dioxide and water are discharged from the catalytic combustion chamber; the organic gas is thoroughly treated without leaving residues.
The invention is further configured to: the adsorbent is an activated carbon adsorbent.
Through adopting above-mentioned technical scheme, the organic gas in the middle of the tail gas can be adsorbed to the activated carbon adsorbent to just can make the organic gas that adsorbs on the activated carbon follow the desorption on the activated carbon through the mode of heating.
The invention is further configured to: also includes a heating device arranged in the catalytic combustion chamber.
Through adopting above-mentioned technical scheme, heating device can enough heat the organic gas that catalytic combustion room is in as, makes it decompose into carbon dioxide and water, can also be with the air cycle after the heating in the middle of the adsorption chamber for the activated carbon can absorb the heat, thereby makes organic gas can follow the desorption on the activated carbon.
The invention is further configured to: and a catalytic combustion bed for carrying out catalytic combustion on the organic gas is arranged in the catalytic combustion chamber.
The invention is further configured to: the catalytic combustion bed is packed with a ceramic honeycomb precious metal catalyst.
The invention is further configured to: the device also comprises a nitrogen making unit which is used for injecting nitrogen into the adsorption chamber when the desorption is completed or the temperature of the adsorbent is abnormal.
Through adopting above-mentioned technical scheme, when heating desorption end and adsorbent temperature is higher at every turn, let in nitrogen gas and cool off the adsorbent in the middle of the adsorption chamber, prevent that the adsorbent temperature is too high and burning.
The invention is further configured to: and a circulating pipeline is arranged between the catalytic combustion chamber and each adsorption chamber, and a conveying pipeline for conveying tail gas into the adsorption chambers is arranged on each adsorption chamber.
The invention is further configured to: the controller comprises a control unit and a display unit;
the adsorption chamber and the catalytic combustion box are respectively provided with a temperature detection module, and the temperature detected by the temperature detection module is transmitted to the control unit and displayed by the display unit;
the control unit controls the opening and closing of the circulation line and the delivery line, and controls the opening and closing of the electric heating device.
Another object of the present invention is to provide a method for treating exhaust gas, comprising the steps of:
s1, tail gas adsorption: introducing the tail gas into an adsorption chamber to be adsorbed by an adsorbent;
s2, tail gas desorption: desorbing the organic gas adsorbed in the adsorbent from the adsorbent;
s3, catalytic combustion: the organic gas desorbed from the adsorbent is catalytically combusted by the catalyst and the heat.
The invention is further configured to: the catalyst is an activated carbon adsorbent; step S2, desorbing the tail gas in a heating mode;
the treatment method further comprises the following steps:
s4, temperature judgment: judging whether the temperature of the adsorbent meets the desorption requirement of the tail gas, if so, performing step S5, and if not, performing step S6;
s5, turning off the electric heating device: controlling the electric heating device to be turned off, and then executing step S4;
s6, starting an electric heating device: the electric heating device is controlled to be turned on, and then step S4 is performed.
In summary, compared with the prior art, the invention has the following beneficial effects: the method filters the organic gas in the tail gas in an adsorbent filtering mode, discharges clean air, and when the adsorbent is fully adsorbed with the organic gas, the catalytic combustion chamber enables the organic gas adsorbed on the adsorbent to be desorbed from the adsorbent and then enters the catalytic combustion chamber, the catalytic combustion is carried out in the catalytic combustion chamber, the organic gas is decomposed into carbon dioxide and water, and then the carbon dioxide and water are discharged out of the catalytic combustion chamber; the organic gas is thoroughly treated without leaving residues.
Drawings
FIG. 1 is a schematic view of the overall structure of the first embodiment;
FIG. 2 is a flow chart illustrating the second embodiment.
In the figure: 1. an adsorption chamber; 2. a catalytic combustor; 3. a nitrogen making unit; 4. a connecting pipe; 5. an air intake line; 6. a gas return line; 7. and an air outlet pipeline.
Detailed Description
In order to make the technical solutions of the present invention better understood, the following description of the technical solutions of the present invention with reference to the accompanying drawings of the present invention is made clearly and completely, and other similar embodiments obtained by a person of ordinary skill in the art without any creative effort based on the embodiments in the present application shall fall within the protection scope of the present application. In addition, directional terms such as "upper", "lower", "left", "right", etc. in the following embodiments are directions with reference to the drawings only, and thus, the directional terms are used for illustrating the present invention and not for limiting the present invention.
The invention is further described with reference to the drawings and the preferred embodiments.
The first embodiment is as follows: an exhaust gas treatment system, see fig. 1, comprises a plurality of adsorption chambers 1, a catalytic combustion chamber 2, a heating device disposed in the catalytic combustion chamber 2, a catalytic combustion plate disposed in the catalytic combustion chamber 2, and a controller. In the present embodiment, the adsorption chamber 1 is provided with an adsorbent for adsorbing the organic gas in the exhaust gas, and preferably, the present embodiment uses activated carbon as the adsorbent for adsorbing the organic gas. A conveying pipeline for conveying tail gas into the adsorption chamber 1 and an air outlet pipeline 7 for conveying filtered air out are fixed on the adsorption chamber 1, and a circulating pipeline is arranged between the catalytic combustion chamber 2 and each adsorption chamber 1; the controller is used for controlling the on-off of the conveying pipe, the circulating pipeline and the exhaust pipeline.
The tail gas is adsorbed by the single adsorption chamber 1, during adsorption, the controller controls a conveying pipeline and an air outlet pipeline 7 on the adsorption chamber 1 for adsorbing the tail gas to be opened, the tail gas enters the adsorption chamber 1, after being adsorbed by an active carbon adsorbent in the adsorption chamber 1, organic gas is adsorbed on the active carbon adsorbent, and clean air is opened through the air outlet pipeline 7; when the adsorbent in the adsorption chamber 1 is full of organic gas, the conveying pipeline and the gas outlet pipeline 7 on the adsorption chamber 1 are controlled to be closed, and the conveying pipeline and the gas outlet pipeline 7 on the other adsorption chamber 1 are opened to continue adsorption operation. The circulating line on the adsorption chamber 1 that the controller control adsorbs full organic gas opens, heating device in the middle of the catalytic combustion chamber 2 begins to heat, through the circulation of circulating line, pass through the heat in the middle of the adsorbent of air transfer to adsorption chamber 1, through the heating, make organic gas desorption on the adsorbent and flow to the catalytic combustion board of catalytic combustion chamber 2 through the circulating line on, when the temperature of catalytic combustion board department reaches decomposition temperature, the catalytic combustion board catalysis organic gas decomposes and forms carbon dioxide and water. After the desorption is completed, the gas outlet line 7 of the adsorption chamber 1 is opened to discharge the generated gas.
In this embodiment, the catalytic combustion plate is filled with a catalyst for catalyzing the decomposition of the organic gas, and in particular, in this embodiment, the catalyst is a ceramic honeycomb precious metal catalyst. The ceramic honeycomb noble metal catalyst has long service life which can reach 12000 hours.
Preferably, in this embodiment, the controller includes a control unit and a display unit, the display unit is configured to display an on-off state of each pipeline, and the control unit is configured to control on-off of each pipeline.
Specifically, in this embodiment, the flow of gas is driven through the fan that sets up on the pipeline, and in this embodiment, explosion-proof fan is chooseed for use to the fan. In this embodiment, be provided with dry filter on the pipeline, it is used for filtering impurity particles such as dust in the middle of the tail gas, prevents that impurity particles from entering into the adsorption chamber 1 in the middle of causing the influence to the adsorption effect of activated carbon adsorbent.
In this embodiment, the catalytic combustor 2 is provided with a catalytic temperature sensor for detecting the temperature at the catalytic combustion plate, and the temperature detected by the catalytic temperature sensor is transmitted to the control unit and transmitted to the display unit by the control unit to be displayed on the display unit. Storing the decomposition temperature required to be reached by the organic gas classification into the control unit, and controlling the heating device to stop heating when the control unit judges that the temperature at the catalytic combustion plate is higher than the decomposition temperature; the temperature released during the decomposition of the organic gas is used to catalyze the decomposition of the remaining organic gas and the adsorbent is heated to effect desorption of the organic gas. When the control unit judges that the temperature at the catalytic combustion plate is lower than the decomposition temperature, the heating device is controlled to continue heating until the temperature reaches the decomposition temperature. The setting range of the decomposition temperature is 250 ℃ to 300 ℃, specifically, in the embodiment, the decomposition temperature is set to 250 ℃.
Preferably, the nitrogen generator set 3 is further arranged in the embodiment, and the nitrogen generator set 3 is used for preparing nitrogen; specifically, the nitrogen making unit 3 comprises a nitrogen making machine, a cold drying machine and a gas storage tank, wherein the nitrogen making machine sends prepared nitrogen into the cold drying machine for cooling and drying, and then sends cooled gas into the gas storage tank for storage. After each desorption, the control unit controls the air storage tank to introduce nitrogen into the adsorption chamber 1 to cool the activated carbon in the adsorption chamber 1.
Preferably, in the present embodiment, an adsorption temperature sensor is further disposed in the adsorption chamber 1, and is configured to detect a temperature of the activated carbon in the adsorption chamber 1, and transmit the detected temperature to the control unit, and then transmit the temperature to the display unit by the control unit to be displayed on the display unit. Dangerous temperature values are stored in the control unit, and the dangerous temperature values are temperature values which are easy to combust after the dangerous temperature values exceed the dangerous temperature values; in this embodiment, the dangerous temperature value is set to 300 ℃ to 320 ℃, specifically, in this embodiment, the dangerous temperature value is set to 300 ℃. When the control unit judges that the temperature detected by the adsorption temperature sensor exceeds a dangerous temperature value, the control unit controls the gas storage tank to introduce nitrogen into the adsorption chamber 1 to cool the activated carbon.
In this embodiment, the circulation pipeline includes an air inlet pipeline 5 and an air return pipeline 6, the air inlet pipeline 5 sends the gas from the catalytic combustion chamber 2 to the adsorption chamber 1, and the air return pipeline 6 sends the gas from the adsorption chamber 1 back to the catalytic combustion chamber 2. Two connecting pipes 4 are fixedly connected to the catalytic combustion chamber 2, wherein one connecting pipe 4 is connected with one end of a plurality of air inlet pipelines 5, and the other connecting pipe 4 is connected with a plurality of air return pipelines 6; the ends of the air inlet pipeline 5 and the air return pipeline 6 which are far away from the connecting pipe 4 are fixedly connected to the adsorption chamber 1. The connection of the connecting pipe 4 and the catalytic combustor 2 is provided with a flame arrester for preventing the flame in the catalytic combustor 2 from spreading outwards.
In some embodiments, a pressure release valve and a cold air supplement valve are disposed at the top of the catalytic combustion chamber 2, the cold air supplement valve is used for supplementing cold air to the catalytic combustion chamber 2 when the temperature in the catalytic combustion chamber 2 is too high, and the pressure release valve is used for releasing pressure when the pressure in the catalytic combustion chamber 2 is too high.
In this embodiment, valves are arranged in the air inlet pipeline 5, the air return pipeline 6, the conveying pipeline and the air outlet pipeline 7, and the opening and closing of the pipelines are controlled by the opening and closing of the valves; specifically, in this embodiment, the valve is an electric control valve, and the control unit controls the opening and closing of the pipeline by controlling the opening and closing of the electric control valve.
In this embodiment, the display unit is a touch screen, and the display unit can transmit the signals to the control unit through manual operation, and the control unit controls each pipeline, the heating device and the like according to the operation signals. Specifically, in this embodiment, the heating device is an electric heating device.
The working principle of the tail gas treatment system when in use is as follows: the tail gas is adsorbed by the single adsorption chamber 1, during adsorption, the controller controls a conveying pipeline and an air outlet pipeline 7 on the adsorption chamber 1 for adsorbing the tail gas to be opened, the tail gas enters the adsorption chamber 1, after being adsorbed by an active carbon adsorbent in the adsorption chamber 1, organic gas is adsorbed on the active carbon adsorbent, and clean air is opened through the air outlet pipeline 7; when the adsorbent in the adsorption chamber 1 is full of organic gas, the conveying pipeline and the gas outlet pipeline 7 on the adsorption chamber 1 are controlled to be closed, and the conveying pipeline and the gas outlet pipeline 7 on the other adsorption chamber 1 are opened to continue adsorption operation. The circulating line on the adsorption chamber 1 that the controller control adsorbs full organic gas opens, heating device in the middle of the catalytic combustion chamber 2 begins to heat, through the circulation of circulating line, pass through the heat in the middle of the adsorbent of air transfer to adsorption chamber 1, through the heating, make organic gas desorption on the adsorbent and flow to the catalytic combustion board of catalytic combustion chamber 2 through the circulating line on, when the temperature of catalytic combustion board department reaches decomposition temperature, the catalytic combustion board catalysis organic gas decomposes and forms carbon dioxide and water. After the desorption is completed, the gas outlet line 7 of the adsorption chamber 1 is opened to discharge the generated gas.
Example two: a method of treating tail gas, see fig. 2, comprising the steps of:
s1, tail gas adsorption: introducing the tail gas into the adsorption chamber 1 to be adsorbed by an adsorbent;
s11, adsorption judgment: judging whether the adsorbent in the adsorption chamber 1 that is adsorbing the organic gas is full of organic gas, and if not, continuing to execute step S1 if the judgment result is no; if the gas is full, if the judgment result is yes, executing S12 and S2;
s12, re-determining that the adsorption chamber 1: determining that the adsorption chamber 1 in the adsorbent does not adsorb the organic gas, and performing step S1;
s2, tail gas desorption: desorbing the organic gas adsorbed in the adsorbent from the adsorbent;
s3, catalytic combustion: the organic gas desorbed from the adsorbent is catalytically combusted by the catalyst and the heat.
S4, temperature judgment: judging whether the temperature of the adsorbent meets the desorption requirement of the tail gas, if so, performing step S5 if yes, and if not, performing step S6 if no;
s5, turning off the electric heating device: controlling the electric heating device to be turned off, and then executing step S4;
s6, starting an electric heating device: the electric heating device is controlled to be turned on, and then step S4 is performed.
In this embodiment, the adsorbent is an activated carbon adsorbent, and in step S2, when the tail gas desorption is performed, the desorption process is performed by heating, specifically, in this embodiment, when the heated temperature of the activated carbon exceeds 150 ℃, the organic gas adsorbed in the activated carbon adsorbent is desorbed from the activated carbon.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (10)
1. An exhaust gas treatment system, characterized in that: comprises a plurality of adsorption chambers (1) in which an adsorbent for adsorbing organic gases is placed;
and a catalytic combustion chamber (2) for desorbing the organic gas adsorbed in the adsorbent from the adsorbent and catalytically combusting the desorbed organic gas in the combustion chamber.
2. The exhaust gas treatment system according to claim 1, wherein: the adsorbent is an activated carbon adsorbent.
3. The exhaust gas treatment system and the exhaust gas treatment method according to claim 2, wherein: also comprises a heating device which is arranged in the catalytic combustion chamber (2).
4. The exhaust gas treatment system and the exhaust gas treatment method according to claim 1, wherein: and a catalytic combustion bed for carrying out catalytic combustion on the organic gas is arranged in the catalytic combustion chamber (2).
5. The exhaust gas treatment system and the exhaust gas treatment method according to claim 4, wherein: the catalytic combustion bed is packed with a ceramic honeycomb precious metal catalyst.
6. The exhaust gas treatment system and the exhaust gas treatment method according to claim 3, wherein: the device also comprises a nitrogen making unit (3) which is used for injecting nitrogen into the adsorption chamber (1) when the desorption is completed or the temperature of the adsorbent is abnormal.
7. The exhaust gas treatment system and the exhaust gas treatment method according to claim 3, wherein: a circulating pipeline is arranged between the catalytic combustion chamber (2) and each adsorption chamber (1), and a conveying pipeline for conveying tail gas into the adsorption chambers (1) is arranged on the adsorption chambers (1).
8. The exhaust gas treatment system and the exhaust gas treatment method according to claim 7, wherein: the controller comprises a control unit and a display unit;
the adsorption chamber (1) and the catalytic combustion box are both provided with temperature detection modules, and the temperatures detected by the temperature detection modules are transmitted to the control unit and displayed by the display unit;
the control unit controls the opening and closing of the circulation line and the delivery line, and controls the opening and closing of the electric heating device.
9. A tail gas treatment method is characterized in that: the method comprises the following steps:
s1, tail gas adsorption: introducing the tail gas into an adsorption chamber (1) and adsorbing the tail gas by an adsorbent;
s2, tail gas desorption: desorbing the organic gas adsorbed in the adsorbent from the adsorbent;
s3, catalytic combustion: the organic gas desorbed from the adsorbent is catalytically combusted by the catalyst and the heat.
10. The exhaust gas treatment system and the exhaust gas treatment method according to claim 1, wherein: the catalyst is an activated carbon adsorbent; step S2, desorbing the tail gas in a heating mode;
the treatment method further comprises the following steps:
s4, temperature judgment: judging whether the temperature of the adsorbent meets the desorption requirement of the tail gas, if so, performing step S5, and if not, performing step S6;
s5, turning off the electric heating device: controlling the electric heating device to be turned off, and then executing step S4;
s6, starting an electric heating device: the electric heating device is controlled to be turned on, and then step S4 is performed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011384209.4A CN112473319A (en) | 2020-12-01 | 2020-12-01 | Tail gas treatment system and tail gas treatment method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011384209.4A CN112473319A (en) | 2020-12-01 | 2020-12-01 | Tail gas treatment system and tail gas treatment method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113750709A (en) * | 2021-10-12 | 2021-12-07 | 泰兴协联众达化学有限公司 | Naphthalene-process phthalic anhydride tail gas catalytic treatment system and treatment method thereof |
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2020
- 2020-12-01 CN CN202011384209.4A patent/CN112473319A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113750709A (en) * | 2021-10-12 | 2021-12-07 | 泰兴协联众达化学有限公司 | Naphthalene-process phthalic anhydride tail gas catalytic treatment system and treatment method thereof |
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