CN214863599U - Desorption device for saturated active carbon - Google Patents
Desorption device for saturated active carbon Download PDFInfo
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- CN214863599U CN214863599U CN202023289065.2U CN202023289065U CN214863599U CN 214863599 U CN214863599 U CN 214863599U CN 202023289065 U CN202023289065 U CN 202023289065U CN 214863599 U CN214863599 U CN 214863599U
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Abstract
The utility model provides a desorption device for saturated activated carbon, which comprises a first activated carbon tower; the inlet of the second activated carbon tower is respectively connected with the first pipeline and the second pipeline, and the outlet of the second activated carbon tower is respectively connected with the third pipeline and the fourth pipeline; the first pipeline is provided with a first valve and a second valve, the second pipeline is provided with a third valve and a first fan, the third pipeline is provided with a fourth valve, the fourth pipeline is sequentially provided with a fifth valve, a second fan, a heat exchanger, a heater and a catalytic reactor, gas output from the catalytic reactor passes through the heat exchanger and then is communicated with the first activated carbon tower through the fifth pipeline, and the fifth pipeline is provided with a sixth valve; and the sixth pipeline is communicated with a fourth pipeline between the fifth valve and the second fan, and the seventh pipeline is communicated with the catalytic reactor and a fourth pipeline of the heat exchange device. The utility model has the advantages of thorough desorption, no secondary pollution and the like.
Description
Technical Field
The utility model relates to a desorption, in particular to desorption device of saturated active carbon.
Background
VOCs (volatile organic compounds) refers to organic compounds having a saturated vapor pressure of more than 133.32Pa at normal temperature and a boiling point of 50-260 ℃ at normal pressure, or any organic solid or liquid capable of volatilizing at normal temperature and normal pressure.
In the existing process for treating organic waste gas by adopting activated carbon adsorption, when the activated carbon adsorption is saturated, the desorption process is usually hot air desorption or water vapor desorption. According to the standard requirement, the activated carbon is desorbed by hot air, the desorption temperature is less than 120 ℃, the desorption temperature is lower than 140 ℃ by adopting steam desorption, and the boiling point of most organic matters is more than 150 ℃, so that the activated carbon is easy to saturate and is frequently replaced due to incomplete desorption by hot air or steam. When flammable gases such as ketones are contained, hot air desorption is not adopted according to the specification. When the water vapor desorption is adopted, a large amount of waste water can be generated in the pipe system, secondary pollution is generated, and the ester substance is hydrolyzed to corrode a subsequent treatment system.
SUMMERY OF THE UTILITY MODEL
In order to solve the defects in the prior art, the utility model provides a desorption device for saturated activated carbon.
The utility model aims at realizing through the following technical scheme:
the desorption device of the saturated activated carbon comprises a first activated carbon tower; the desorption device of saturated active carbon still includes:
the inlet of the first active carbon tower is respectively connected with a first pipeline and a second pipeline, and the outlet of the first active carbon tower is respectively connected with a third pipeline and a fourth pipeline; the first pipeline is provided with a first valve and a second valve, the second pipeline is provided with a third valve and a first fan, the third pipeline is provided with a fourth valve, the fourth pipeline is sequentially provided with a fifth valve, a second fan, a heat exchanger, a heater and a catalytic reactor, gas output from the catalytic reactor passes through the heat exchanger and then is communicated with the first activated carbon tower through the fifth pipeline, and the fifth pipeline is provided with a sixth valve;
the sixth pipeline is communicated with a fourth pipeline between the fifth valve and the second fan, and the seventh pipeline is communicated with the catalytic reactor and a fourth pipeline of the heat exchange device.
Compared with the prior art, the utility model discloses the beneficial effect who has does:
1. the desorption is thorough;
the desorption temperature range is 120-200 ℃, the desorption range is wide, the desorption efficiency is high especially for organic matters with high boiling points, the desorption is thorough, and the frequent replacement of active carbon is avoided;
2. no secondary pollution is caused;
the cyclic nitrogen (introduced through the first pipeline) is adopted for desorption, so that the safety performance is higher than that of hot air desorption, and no secondary pollution is caused compared with that of steam desorption;
3. the operation cost is low;
the air and nitrogen conveying amount is controlled by closed loop circulation desorption (second fan-heat exchanger-heater-catalytic reactor-heat exchanger-first active carbon tower-second fan) and oxygen content of the system is detected by an oxygen analyzer, so that the consumption of nitrogen is effectively and greatly reduced, and the operation cost is reduced;
and a closed loop is adopted for cyclic desorption, so that all heat released by organic matter reaction can be utilized, and the operation energy consumption is effectively reduced.
4. The whole device can be directly arranged in an explosion-proof occasion, and has high environmental adaptability;
5. the safety is good;
and the second active carbon tower is utilized to adsorb the incompletely desorbed organic matters in the first active carbon tower, so that the organic matters are prevented from being directly discharged to the atmosphere.
Drawings
The disclosure of the present invention will become more readily understood with reference to the accompanying drawings. As is readily understood by those skilled in the art: these drawings are only intended to illustrate the technical solution of the present invention and are not intended to limit the scope of the present invention. In the figure:
fig. 1 is a schematic structural diagram of a desorption device for saturated activated carbon according to an embodiment of the present invention.
Detailed Description
Fig. 1 and the following description depict alternative embodiments of the invention to teach those skilled in the art how to make and reproduce the invention. For the purpose of teaching the present invention, some conventional aspects have been simplified or omitted. Those skilled in the art will appreciate variations or substitutions from these embodiments that will be within the scope of the invention. Those skilled in the art will appreciate that the features described below can be combined in various ways to form multiple variations of the invention. Accordingly, the present invention is not limited to the following alternative embodiments, but is only limited by the claims and their equivalents.
Example 1:
fig. 1 shows the schematic structural diagram of the desorption device for saturated activated carbon in the embodiment of the present invention, as shown in fig. 1, the desorption device for saturated activated carbon includes:
the inlet of the first activated carbon tower 21 is respectively connected with the first pipeline 11 and the second pipeline 12, and the outlet of the first activated carbon tower 21 is respectively connected with the third pipeline 13 and the fourth pipeline 14; a first valve 31 and a second valve 32 are arranged on the first pipeline 11, a third valve 33 and a first fan 41 are arranged on the second pipeline 12, a fourth valve 34 is arranged on the third pipeline 13, a fifth valve 35, a second fan 42, a heat exchanger 51, a heater 61 and a catalytic reactor 71 are sequentially arranged on the fourth pipeline 14, gas output from the catalytic reactor 71 passes through the heat exchanger 51 to be heated and then is communicated with the first activated carbon tower 21 through a fifth pipeline 15, and a sixth valve 36 is arranged on the fifth pipeline 15;
a sixth pipeline 16 and a seventh pipeline 17, wherein the sixth pipeline 16 is communicated with the fourth pipeline 14 between the fifth valve 35 and the second fan 42, and the seventh pipeline 17 is communicated with the fourth pipeline 14 between the catalytic reactor 71 and the heat exchanger 51.
In order to prevent the incompletely desorbed organic matters in the first activated carbon tower from being directly discharged into the atmosphere, further, the third pipeline 13 is communicated with an inlet of the second activated carbon tower 22, and the activated carbon in the second activated carbon tower 22 is not saturated by adsorption.
Further, the fifth pipeline 15 communicates with the first pipeline 11 between the first valve 31 and the second valve 32 in order to form a cyclic desorption.
In order to control the different gas inlets in different stages, furthermore, a seventh valve 37 is provided on the sixth pipeline 16 for controlling whether air enters the sixth pipeline 16; upstream of said first fan 41 an eighth valve 38 is arranged for controlling whether air enters the second duct 12.
In order to control whether to communicate with the atmosphere, further, the outlet of the second activated carbon tower 22 communicates with an eighth pipeline 18, and a ninth valve 39 is arranged on the eighth pipeline 18.
In order to monitor whether the oxygen in the desorption cycle meets the requirement of the catalytic reaction, further, the desorption device for saturated activated carbon further comprises:
an oxygen sensor (not shown) for the oxygen content in the upstream or downstream of the first activated carbon column.
Example 2:
according to the utility model discloses the desorption device of saturated active carbon in the application of certain automobile parts spray booth.
In this application example, as shown in fig. 1, the third pipeline 13 communicates with an inlet of a second activated carbon tower 22, and activated carbon in the second activated carbon tower 22 is not saturated by adsorption; a fifth pipe 15 communicating the first pipe 11 between the first valve 31 and the second valve 32; a seventh valve 37 is provided on the sixth pipe 16 for controlling whether air enters the sixth pipe 16; upstream of said first fan 41, an eighth valve 38 is provided for controlling the admission of air into the second duct 12; an outlet of the second activated carbon tower 22 (the inside is activated carbon which is not saturated by adsorption) is communicated with an eighth pipeline 18, and a ninth valve 39 is arranged on the eighth pipeline 18; an oxygen sensor is used for the oxygen content in the upstream or downstream of the first activated carbon tower 21.
In this application, the main contaminants were toluene (boiling point 110 ℃ C.), xylene (boiling point 138 to 145 ℃ C.), trimethylbenzene (boiling point 164 to 165 ℃ C.), ethyl acetate (77 ℃ C.) and butyl acetate (126 ℃ C.).
The saturated active carbon desorption device of this embodiment's working process does:
opening a first valve 31, a second valve 32, a fifth valve 35 and a sixth valve 36, closing a fourth valve 34, a ninth valve 39, a third valve 33, an eighth valve 38 and a seventh valve 37, starting a circulating fan 42, enabling nitrogen to enter a first activated carbon tower 21 from a first pipeline, and sequentially enter the fan 42, a heat exchanger 51, a heater 61 (not started), a catalytic reactor 71, the heat exchanger 51, the first activated carbon tower 21 and the second fan 42, replacing oxygen in the pipeline in circulation, and starting the heater 61 to heat the circulating nitrogen when the oxygen content in the circulation is less than 8%;
along with the temperature rise of the circulating system, organic matters in the first activated carbon tower 21 are gradually desorbed, and the temperature of the first activated carbon tower 21 is maintained at about 180 ℃; the desorption gas is preheated to 250-300 ℃ through a waste gas heater 61, enters a catalytic reactor 71 to perform catalytic oxidation reaction, and the heat released by the reaction is recovered through the waste gas heater 61, and then the clean gas is circulated back to the activated carbon tower 1 to be desorbed;
during the desorption process, the oxygen content in the cycle is detected, and if the oxygen content is lower than a set value (catalytic reaction can not be carried out), the seventh valve 37 needs to be opened, and supplementary air enters the cycle from the sixth pipeline 16;
detecting the concentration of organic matters in the circulating desorption line by a combustible gas detector, and turning off the second fan 42 when the concentration is lower than 1 percent LEL;
closing the first valve 31, the second valve 32, the fifth valve 35 and the sixth valve 36, opening the eighth valve 38, the third valve 33, the fourth valve 34 and the ninth valve 39, opening the first fan 41, allowing air to enter the first activated carbon tower 21, purging residual organic matters to the second activated carbon tower 22, and stopping purging when the temperature of the first activated carbon tower 21 is reduced to below 40 ℃.
Through the cyclic nitrogen catalytic oxidation desorption treatment, the replacement period of the activated carbon reaches 1.5 years, the average removal rate of organic matters in the waste gas adsorbed by the activated carbon is more than 90%, and the removal rate of the organic matters in the desorbed waste gas by catalytic oxidation is more than 99%.
Example 3:
according to the utility model discloses the application of saturated activated carbon's desorption device in furniture spray booth of embodiment 1.
The saturated activated carbon desorption device of the embodiment is the same as that of the embodiment 2, and the main pollutants in the furniture spraying room are toluene (boiling point 110 ℃), xylene (boiling point 138-145 ℃), ethyl acetate (77 ℃) and butyl acetate (126 ℃).
Through the cyclic nitrogen catalytic oxidation desorption treatment, the replacement period of the activated carbon reaches 2 years, the average removal rate of organic matters in the waste gas adsorbed by the activated carbon is more than 90%, and the removal rate of the organic matters in the desorbed waste gas by catalytic oxidation is more than 99%.
Claims (6)
1. The desorption device of the saturated activated carbon comprises a first activated carbon tower; it is characterized in that the desorption device for saturated activated carbon further comprises:
the inlet of the first active carbon tower is respectively connected with a first pipeline and a second pipeline, and the outlet of the first active carbon tower is respectively connected with a third pipeline and a fourth pipeline; the first pipeline is provided with a first valve and a second valve, the second pipeline is provided with a third valve and a first fan, the third pipeline is provided with a fourth valve, the fourth pipeline is sequentially provided with a fifth valve, a second fan, a heat exchanger, a heater and a catalytic reactor, gas output from the catalytic reactor passes through the heat exchanger and then is communicated with the first activated carbon tower through a fifth pipeline, and the fifth pipeline is provided with a sixth valve;
the sixth pipeline is communicated with a fourth pipeline between the fifth valve and the second fan, and the seventh pipeline is communicated with the catalytic reactor and a fourth pipeline of the heat exchange device.
2. The desorption device of saturated activated carbon as claimed in claim 1, wherein the third pipeline is communicated with the inlet of the second activated carbon tower, and the activated carbon in the second activated carbon tower is not saturated by adsorption.
3. The saturated activated carbon desorption device of claim 1 wherein the fifth conduit communicates with the first conduit between the first and second valves.
4. The saturated activated carbon desorption device of claim 1 wherein a seventh valve is disposed on the sixth pipeline and an eighth valve is disposed upstream of the first fan.
5. The desorption device for saturated activated carbon according to claim 2, wherein the outlet of the second activated carbon tower is communicated with an eighth pipeline, and a ninth valve is arranged on the eighth pipeline.
6. The saturated activated carbon desorption device as claimed in claim 1, further comprising:
an oxygen sensor for oxygen content in the upstream or downstream of the first activated carbon column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023289065.2U CN214863599U (en) | 2020-12-31 | 2020-12-31 | Desorption device for saturated active carbon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023289065.2U CN214863599U (en) | 2020-12-31 | 2020-12-31 | Desorption device for saturated active carbon |
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| Publication Number | Publication Date |
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| CN214863599U true CN214863599U (en) | 2021-11-26 |
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| CN202023289065.2U Active CN214863599U (en) | 2020-12-31 | 2020-12-31 | Desorption device for saturated active carbon |
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| CN (1) | CN214863599U (en) |
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