CN212790376U - Processing apparatus who contains chlorinated hydrocarbon organic waste gas - Google Patents
Processing apparatus who contains chlorinated hydrocarbon organic waste gas Download PDFInfo
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- CN212790376U CN212790376U CN202021245005.8U CN202021245005U CN212790376U CN 212790376 U CN212790376 U CN 212790376U CN 202021245005 U CN202021245005 U CN 202021245005U CN 212790376 U CN212790376 U CN 212790376U
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Abstract
The utility model discloses a processing apparatus that contains chlorinated hydrocarbon organic waste gas, including admission line, the pipeline of giving vent to anger, desorption pipeline, vacuum pump, heat exchanger, knockout drum and a to a plurality of adsorption tanks, it has the resin that can be used to adsorb volatile organic waste gas to fill in the adsorption tank, the bottom and the top of adsorption tank respectively with admission line, the pipeline of giving vent to anger are linked together, the desorption pipeline include vacuum desorption pipeline and vapor pipeline, the one end of vacuum desorption pipeline with the adsorption tank bottom is linked together, the other end with the vacuum pump links to each other, the vapor pipeline with the top of adsorption tank communicates with each other, the one end of heat exchanger with the vacuum pump links to each other, the other end with the knockout drum links to each other, be equipped with the switch valve on admission line, the pipeline of giving vent to anger, vacuum desorption pipeline and the vapor pipeline respectively. The utility model discloses high temperature chlorine gas corrosion equipment's problem when can alleviating contain the organic waste gas treatment of chlorohydrocarbon problem realizes resource recovery and recycles.
Description
Technical Field
The utility model relates to the technical field of chemical industry, in particular to processing apparatus who contains chlorinated hydrocarbon organic waste gas.
Background
In recent years, along with the promotion and implementation of environmental protection concepts and the continuous implementation of relevant policies, the treatment of Volatile Organic Compounds (VOCs) waste gas has become an important content. In waste gas treatment, active carbon concentration + CO, molecular sieve rotating wheel + RTO are common treatment processes, especially in coating and pharmacy waste gas treatment.
However, coating and pharmaceutical waste gases contain chlorinated hydrocarbon solvents such as methylene chloride in addition to benzene compounds, butanol and n-butyl ester. When the organic waste gas containing chlorohydrocarbon is treated by using the processes of activated carbon concentration, CO or a molecular sieve rotating wheel and RTO, the high-temperature chlorine-containing gas corrodes equipment due to the chlorine and water contained in combustion gases such as CO or RTO, the service life of the equipment is shortened, and the CO or RTO process is not suitable for treatment especially when the chlorine content exceeds 200 mg/L.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a device for treating organic waste gas containing chlorinated hydrocarbon, which can effectively reduce the concentration of organic waste gas containing chlorinated hydrocarbon, and improve the problem of equipment corrosion caused by high-temperature chlorinated gas existing in other processes for treating such waste gas.
In order to realize the purpose, the utility model discloses a technical scheme as follows:
an apparatus for treating organic waste gas containing chlorinated hydrocarbon comprises: air inlet pipe, pipeline, desorption pipeline, vacuum pump, heat exchanger, knockout drum and a to a plurality of adsorption tanks, it has the resin that can be used to adsorb volatile organic waste gas to fill in the adsorption tank, the bottom and the top of adsorption tank respectively with air inlet pipe, pipeline of giving vent to anger are linked together, the desorption pipeline include vacuum desorption pipeline and vapor pipeline, the one end of vacuum desorption pipeline with the adsorption tank bottom is linked together, the other end with the vacuum pump links to each other, the vapor pipeline with the top of adsorption tank communicates with each other, the one end of heat exchanger with the vacuum pump links to each other, the other end with the knockout drum links to each other, be equipped with the switch valve on air inlet pipe, pipeline, vacuum desorption pipeline and the vapor pipeline of giving vent to anger respectively.
Preferably, the resin is a hydrophobic crosslinked resin with styrene-divinylbenzene as a framework. Hydrophobic cross-linked resin is selected as an adsorbent, organic molecules in the waste gas are adsorbed by utilizing the physical adsorption effect of micropores in the resin, the hydrophobic property can better avoid water molecules from remaining in the resin in the subsequent desorption process, and the drying process is reduced.
Preferably, the hydrophobic crosslinked resin is spherical particles with the diameter of 2-4 mm.
Preferably, a pressure detection device is arranged on the vacuum desorption pipeline. Through setting up pressure measurement to when vacuum desorption, monitor the regulation and control to the pressure condition in the adsorption tank.
Preferably, a first VOCs gas concentration detection device is arranged on the gas inlet pipeline.
Preferably, a second VOCs gas concentration detection device is arranged on the gas outlet pipeline. Through the second VOCs gas concentration detection device who sets up on the pipeline of giving vent to anger, the realization is to the supervision of exhaust gas concentration accuse, guarantees that the concentration of exhaust gas reaches the requirement, and simultaneously, the device of being convenient for switches to the desorption state when exhaust gas concentration reaches the setting value.
Preferably, the device also comprises a solvent storage tank for collecting the organic solvent separated out from the separation tank, and the solvent storage tank is communicated with the separation tank through a connecting pipe. The separated organic solvent is stored in a solvent storage tank and can be recycled.
The utility model discloses following beneficial effect has: through the cooperation of vacuum desorption pipeline, vacuum pump, vapor pipeline, vacuum depressurization desorption combines saturated vapor to sweep, and both combine together the desorption, promote desorption efficiency to strengthen the treatment effect who contains chlorohydrocarbon organic waste gas, simultaneously, improve the problem that other technologies handle the high temperature chlorine gas corrosion equipment that this type of waste gas carried, can realize organic solvent's recovery and recycle.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Description of the main component symbols: 1. an air intake duct; 2. an air outlet pipe; 3. desorbing the pipeline; 31. vacuum desorption pipeline; 32. a pressure detection device; 33. a water vapor conduit; 4. a vacuum pump; 5. a heat exchanger; 6. a separation tank; 7. an adsorption tank; 8. a resin; 9. an on-off valve; 10. a first VOCs gas concentration detection device; 11. a second VOCs gas concentration detection device; 12. and (5) a solvent storage tank.
Detailed Description
The invention is further described with reference to the following drawings and detailed description.
Example one
The device for treating the organic waste gas containing the chlorinated hydrocarbon as shown in the figure 1 comprises: inlet line 1, outlet pipe 2, desorption pipeline 3, vacuum pump 4, heat exchanger 5, knockout drum 6 and one to a plurality of adsorption tanks 7, it has the resin 8 that can be used to adsorb volatile organic waste gas to fill in the adsorption tank 7, the bottom and the top of adsorption tank 7 respectively with inlet line 1, outlet pipe 2 is linked together, desorption pipeline 3 includes vacuum desorption pipeline 31 and vapor pipeline 33, vacuum desorption pipeline 31's one end is linked together with adsorption tanks 7 bottom, the other end links to each other with vacuum pump 4, vapor pipeline 33 communicates with each other with adsorption tanks 7's top, heat exchanger 5's one end links to each other with vacuum pump 4, the other end links to each other with knockout drum 6, inlet line 1, outlet pipe 2, be equipped with ooff valve 9 on vacuum desorption pipeline 31 and the vapor pipeline 33 respectively. The vacuum desorption pipeline 31 is provided with a pressure detection device 32. And a first VOCs gas concentration detection device 10 is arranged on the gas inlet pipeline 1. And a second VOCs gas concentration detection device 11 is arranged on the gas outlet pipeline 2. The solvent storage tank 12 is communicated with the separation tank 6 through a connection pipe.
Specifically, taking a certain chlorinated hydrocarbon-containing motorcycle spraying waste gas as an example, the concentration of the waste gas is 300-350 mg/m3The operation mode of the device for treating the organic waste gas containing the chlorohydrocarbon is as follows:
before introducing the waste gas, the waste gas is subjected to cooling and dedusting pretreatment, and 4% hydrochloric acid and 4% sodium hydroxide activated resin 8 with the flow rate of 1BV/h are adopted, so that the adsorption efficiency is improved.
The waste gas after the temperature reduction and dust removal pretreatment enters the adsorption tank 7 through the gas inlet pipeline 1, the gas flow rate is 0.2-0.5 m/s, organic matter molecules in the waste gas are diffused to the surface of the resin 8, and physical adsorption is carried out in micropores of the resin 8.
The adsorbed waste gas is discharged from the gas outlet pipeline 2 and detected by a second VOCs gas concentration detection device 11, and when the concentration of the discharged waste gas reaches 40mg/m3And the switch valves 9 on the air inlet pipeline 1 and the air outlet pipeline 2 are closed, and the device is switched to a desorption state.
During desorption, the vacuum pump 4 is started, vacuum desorption is carried out through the vacuum desorption pipeline 31, the system pressure is reduced to 5kPa under the detection of the pressure detection device 32, the vacuum desorption time is 40min, the pressure in the micropores of the resin 8 is greater than the external pressure of the micropores, and organic matter molecules in the micropores can escape from the micropores.
After vacuum desorption, 0.4MPa saturated steam is introduced through the steam pipeline 33 for purging for 30min, 0.4MPa saturated steam is selected for purging, on one hand, residual organic molecules in micropores are desorbed, due to the hydrophobic property of the selected resin 8, the influence of the introduced saturated steam on the residual organic molecules is small, an additional drying procedure is not needed, meanwhile, the temperature of the system is slightly increased, the desorption is promoted, on the other hand, the introduced 0.4MPa saturated steam can carry the desorbed organic molecules, and the subsequent organic solvent recovery is facilitated.
The vacuum desorption and the 0.4MPa saturated steam are combined for desorption, so that the desorption efficiency is higher, and the condition that high-temperature chlorine-containing gas corrodes equipment in other processes can be improved.
After the desorption is finished, the organic molecules desorbed by the vacuum desorption gas and the saturated steam purging pass through a heat exchanger 5, and the temperature of a refrigerant of a refrigerating machine in the heat exchanger 5 is set to be-10 to-5 ℃.
After heat exchange and temperature reduction, the desorbed product is condensed in the separation tank 6, because the density difference between water and the organic solvent is large, layering occurs in the separation tank 6, and the layered organic solvent is transferred to the solvent storage tank 12 to be recycled.
After the treatment, the concentration of the organic waste gas containing the chlorinated hydrocarbon is 300-350 mg/m3Reduced to 40mg/m3The dynamic capacity of the resin 8 for adsorbing organic substances was 48.6kg/m3The desorption efficiency exceeds 98 percent.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. A device for treating organic waste gas containing chlorinated hydrocarbon is characterized in that: including admission line, pipeline, desorption pipeline, vacuum pump, heat exchanger, knockout drum and a to a plurality of adsorption tanks, it has the resin that can be used to adsorb volatile organic waste gas to fill in the adsorption tank, the bottom and the top of adsorption tank respectively with admission line, pipeline of giving vent to anger are linked together, the desorption pipeline include vacuum desorption pipeline and vapor pipeline, the one end of vacuum desorption pipeline with the adsorption tank bottom is linked together, the other end with the vacuum pump links to each other, the vapor pipeline with the top of adsorption tank communicates with each other, the one end of heat exchanger with the vacuum pump links to each other, the other end with the knockout drum links to each other, be equipped with the switch valve on admission line, pipeline, vacuum desorption pipeline and the vapor pipeline of giving vent to anger respectively.
2. The apparatus for treating organic waste gas containing chlorinated hydrocarbon according to claim 1, wherein: the resin is hydrophobic cross-linked resin taking styrene-divinylbenzene as a framework.
3. The apparatus for treating organic waste gas containing chlorinated hydrocarbon according to claim 2, wherein: the hydrophobic crosslinked resin is spherical particles with the diameter of 2-4 mm.
4. The apparatus for treating organic waste gas containing chlorinated hydrocarbon according to claim 1, wherein: and a pressure detection device is arranged on the vacuum desorption pipeline.
5. The apparatus for treating organic waste gas containing chlorinated hydrocarbon according to claim 1, wherein: and a first VOCs gas concentration detection device is arranged on the gas inlet pipeline.
6. The apparatus for treating organic waste gas containing chlorinated hydrocarbon according to claim 1, wherein: and a second VOCs gas concentration detection device is arranged on the gas outlet pipeline.
7. The apparatus for treating organic waste gas containing chlorinated hydrocarbon according to claim 1, wherein: the device also comprises a solvent storage tank for collecting the organic solvent layered in the separation tank, and the solvent storage tank is communicated with the separation tank through a connecting pipe.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021245005.8U CN212790376U (en) | 2020-06-30 | 2020-06-30 | Processing apparatus who contains chlorinated hydrocarbon organic waste gas |
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| CN202021245005.8U CN212790376U (en) | 2020-06-30 | 2020-06-30 | Processing apparatus who contains chlorinated hydrocarbon organic waste gas |
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| CN212790376U true CN212790376U (en) | 2021-03-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115337750A (en) * | 2022-09-01 | 2022-11-15 | 苏州蓝贝环保有限公司 | A adsorb treatment facility that is used for big amount of wind volatile organic compounds dichloromethane to reach standard to discharge |
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- 2020-06-30 CN CN202021245005.8U patent/CN212790376U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115337750A (en) * | 2022-09-01 | 2022-11-15 | 苏州蓝贝环保有限公司 | A adsorb treatment facility that is used for big amount of wind volatile organic compounds dichloromethane to reach standard to discharge |
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