CN214598073U - Desorption system is inhaled to active carbon - Google Patents
Desorption system is inhaled to active carbon Download PDFInfo
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- CN214598073U CN214598073U CN202120465000.4U CN202120465000U CN214598073U CN 214598073 U CN214598073 U CN 214598073U CN 202120465000 U CN202120465000 U CN 202120465000U CN 214598073 U CN214598073 U CN 214598073U
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 201
- 238000003795 desorption Methods 0.000 title claims abstract description 94
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 53
- 238000001179 sorption measurement Methods 0.000 claims abstract description 126
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 100
- 238000001816 cooling Methods 0.000 claims abstract description 65
- 238000001035 drying Methods 0.000 claims abstract description 29
- 229910052757 nitrogen Inorganic materials 0.000 claims description 46
- 239000002912 waste gas Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 abstract description 23
- 238000005516 engineering process Methods 0.000 abstract description 14
- 229910001873 dinitrogen Inorganic materials 0.000 abstract description 8
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 239000002245 particle Substances 0.000 abstract 1
- 238000002336 sorption--desorption measurement Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 20
- 150000002576 ketones Chemical class 0.000 description 18
- 239000012855 volatile organic compound Substances 0.000 description 17
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 9
- 230000000694 effects Effects 0.000 description 5
- 229920006395 saturated elastomer Polymers 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000011261 inert gas Substances 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 206010000369 Accident Diseases 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 238000004148 unit process Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses an active carbon adsorption desorption system, including first active carbon adsorption jar, second active carbon adsorption jar and respectively with the active carbon adsorption unit that first active carbon adsorption jar and second active carbon adsorption jar intercommunication formed, steam desorption unit, nitrogen gas desorption unit and cooling drying unit, active carbon adsorption unit and first active carbon adsorption jar and second active carbon adsorption jar intercommunication form two jars of single-stage particle active carbon adsorption route, steam desorption unit forms one-way steam desorption route, cooling drying unit forms nitrogen gas cooling drying route and cooling air cooling drying circulation return circuit. The utility model discloses integrate, improve and optimize two jar single-stage active carbon of design and inhale desorption system on traditional steam desorption and nitrogen gas desorption technology basis, when improving steam desorption technology security and adaptability, simple process and operation energy consumption are low.
Description
Technical Field
The utility model belongs to the technical field of pharmaceutical chemical industry, concretely relates to desorption system is inhaled to active carbon.
Background
Volatile Organic Compounds (VOCs) waste gas discharged from industrial activities is one of the important causes of air pollution, and currently, absorption methods, adsorption methods, combustion methods, condensation methods and the like are commonly used as treatment technologies. The adsorption recovery method has the advantages of good treatment effect, organic matter recycling and the like, and is widely applied. Usually, the adsorbent is desorbed by using water vapor or hot gas after being adsorbed and saturated, and the desorbed gas can be condensed to liquefy, recover or store the organic components. Solvent waste gas is easily formed in the production process of the pharmaceutical chemical industry, mainly the solvent waste gas is formed by methanol, toluene, acetone, dichloromethane and the like, the intermittent discharge and the high concentration fluctuation cause air pollution. Because the waste gas components contain acetone and other ketone substances, the fire accident is easy to happen when the traditional adsorption method steam desorption process is adopted, the complexity degree is high when the novel nitrogen desorption process is adopted, and the operation cost of the device is increased.
In the prior art, the steam desorption technology has the following defects: firstly, bed temperature rise in the adsorption process is monitored, but effective regulation and control measures are lacked, so that the abnormal operation of the device is easily caused, and the reliability is low; secondly, only time sequence single-dimension control is set in the desorption process, so that the desorption effect is lack of comprehensive monitoring, incomplete desorption or excessive desorption energy consumption is easy to cause, the security is low, and the operation energy consumption is large; fresh air is adopted as a medium in the cooling and drying process, so that the adsorption bed is easy to cause fire accidents under the condition of incomplete desorption, the adsorption bed is not suitable for treating waste gas containing acetone and other ketone components, and the process safety and the adaptability are poor; and fourthly, the phenomena of pollutant exceeding standard in the initial cooling stage and tail gas pipeline pressure fluctuation exist in the fresh air cooling direct discharging process, the exhaust of the production system is influenced, and the reliability is low. The existing nitrogen desorption technology adopts nitrogen with higher purity, needs higher heating sources such as medium-pressure steam, heat conduction oil or an electric heater and the like, has harsh desorption conditions, and has 20 to 30 percent higher operating cost compared with the steam desorption technology.
SUMMERY OF THE UTILITY MODEL
The above-mentioned not enough to prior art exists, the utility model aims at providing an activated carbon adsorbs desorption system integrates, improves and optimizes on traditional steam desorption and nitrogen gas desorption technology basis, and the design proposes two jars of single-stage Granule Activated Carbon (GAC) and adsorbs desorption system, when improving steam desorption technology security and adaptability, compares in nitrogen gas desorption technology's simple process and operation energy consumption low.
Aiming at the problem of high content of acetone and other ketone substances in solvent waste gas in the pharmaceutical and chemical industry, the process for treating the ketone volatile organic compound tail gas by the activated carbon adsorption and desorption system is further provided, and the treatment efficiency and safety of the ketone volatile organic compound tail gas are improved by additionally arranging an adsorption process bed layer temperature adjusting and controlling unit and improving a drying and cooling unit process.
In order to achieve the above object, the utility model adopts the following technical scheme:
an activated carbon adsorption and desorption system comprises a first activated carbon adsorption tank, a second activated carbon adsorption tank, an activated carbon adsorption unit, a steam desorption unit, a nitrogen desorption unit and a cooling and drying unit, wherein the activated carbon adsorption unit, the steam desorption unit, the nitrogen desorption unit and the cooling and drying unit are respectively communicated with the first activated carbon adsorption tank and the second activated carbon adsorption tank through pipelines and valves; wherein,
the active carbon adsorption unit comprises a first surface cooler and an induced draft fan, wherein an inlet of the first surface cooler is communicated with a waste gas inlet pipeline through a waste gas inlet valve, an outlet of the first surface cooler is communicated with the first active carbon adsorption tank through a first air inlet valve respectively, and is communicated with the second active carbon adsorption tank through a second air inlet valve respectively, and the induced draft fan is communicated with the first active carbon adsorption tank through a first exhaust valve and is communicated with the second active carbon adsorption tank through a second exhaust valve respectively to form a two-tank single-stage granular active carbon adsorption passage;
the steam desorption unit comprises a first desorption steam inlet valve and a first desorption exhaust valve, wherein steam ports of the first desorption steam inlet valve and the first desorption exhaust valve are respectively communicated with the first activated carbon adsorption tank through pipelines, and a second desorption steam inlet valve and a second desorption exhaust valve are communicated with the second activated carbon adsorption tank to form a one-way steam desorption passage;
the cooling and drying unit comprises a first nitrogen air inlet valve and a first nitrogen air outlet valve, wherein nitrogen openings of the first nitrogen air inlet valve and the first nitrogen air outlet valve are respectively communicated with the first activated carbon adsorption tank through pipelines, and a second nitrogen air inlet valve and a second nitrogen air outlet valve are communicated with the second activated carbon adsorption tank, and the first nitrogen air outlet valve and the second nitrogen air outlet valve are communicated with the inlet of the first surface air cooler through pipelines to form a nitrogen cooling and drying passage;
still including respectively through first cooling intake valve with first active carbon adsorption jar intercommunication with through second cooling intake valve with the cooling blower of second active carbon adsorption jar intercommunication, through first cooling exhaust valve with first active carbon adsorption jar intercommunication with through second cooling exhaust valve with the second surface cooler of second active carbon adsorption jar intercommunication, just cooling blower with the second surface cooler communicates each other, forms cooling air cooling drying cycle return circuit.
Preferably, first active carbon adsorption jar with the second active carbon adsorption jar all is equipped with a plurality of granular activated carbon layers, and jar internal all is equipped with waste gas inlet channel to its bottom.
Preferably, first desorption exhaust valve is located first active carbon adsorption tank bottom, second desorption exhaust valve is located second active carbon adsorption tank bottom.
The process for treating the ketone volatile organic compound tail gas by the activated carbon adsorption and desorption system comprises the following steps of performing activated carbon adsorption, steam desorption, nitrogen combined cooling air cooling and drying treatment on the ketone volatile organic compound tail gas by the activated carbon adsorption and desorption system:
(1) adsorption: after the ketone volatile organic compound tail gas is cooled by a first surface cooler, respectively introducing the ketone volatile organic compound tail gas into the first activated carbon adsorption tank and the second activated carbon adsorption tank to perform granular activated carbon adsorption, and after the adsorption is saturated, allowing the ketone volatile organic compound tail gas to flow out through a draught fan;
(2) desorption: after the adsorption saturation, the first activated carbon adsorption tank and the second activated carbon adsorption tank are activated and regenerated by the steam desorption unit, organic matters adsorbed and concentrated on the granular activated carbon are desorbed and swept by the decompressed saturated steam, and the desorbed steam and the condensate are recovered and then treated;
(3) cooling and drying: and (3) blowing the activated carbon desorbed in the step (2) by inert gas nitrogen and/or cooling air until the temperature is reduced and the activated carbon is dried until the waste gas is adsorbed by the activated carbon.
Preferably, the first activated carbon adsorption tank and the second activated carbon adsorption tank are automatically switched by a control valve to alternately perform adsorption, desorption, cooling and drying processes, and the processes are circularly repeated until the tail gas of the ketone volatile organic compounds reaches the standard and is discharged.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the utility model discloses integrate, improve and optimize on traditional steam desorption and nitrogen gas desorption technology basis, two jars of single-stage active carbon desorption systems are proposed in the design, when improving steam desorption technology security and adaptability, compare in nitrogen gas desorption technology's simple process and operation energy consumption low.
(2) The utility model discloses an add adsorption process bed temperature regulation and the control unit and improve dry cooling unit technology, be provided with the regulation and the control that independent cooling blower and surface cooler are used for adsorption process bed temperature rise like cooling and drying unit, the cooling process does not have outer exhaust wind, and does not have the initial pollution problem that exceeds standard, and does not fluctuate because of the wind pressure of the dry operation of cooling arouses the main exhaust system of system, improves the treatment effeciency and the security of ketone volatile organic compounds tail gas.
(3) The utility model discloses an inert gas nitrogen gas is as the dry air supply of cooling down, guarantees that the ketone-containing volatile organic compounds tail gas active carbon adsorption system cooling drying process is safe, reliable, improves the holistic technology suitability of system and operational reliability.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings, so as to fully understand the objects, the features and the effects of the present invention.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention without limitation. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
fig. 1 is a schematic structural diagram of an activated carbon adsorption and desorption system in a preferred embodiment of the present invention;
the reference numbers are as follows: 1-an exhaust gas inlet valve, 2-a first surface cooler, 3-a first air inlet valve, 4-a first air outlet valve, 5-a first desorption air inlet valve, 6-a first desorption air outlet valve, 7-a first nitrogen air inlet valve, 8-a first nitrogen air outlet valve, 9-a first cooling air inlet valve, 10-a first cooling air outlet valve, 11-a second air inlet valve and 12-a second air outlet valve, 13-a second desorption steam inlet valve, 14-a second desorption exhaust valve, 15-a second nitrogen air inlet valve, 16-a second nitrogen exhaust valve, 17-a second cooling air inlet valve, 18-a second cooling exhaust valve, 19-an induced draft fan, 20-a cooling fan, 21-a second surface air cooler, 22-a first activated carbon adsorption tank and 23-a second activated carbon adsorption tank.
Detailed Description
The technical solution of the present invention will be further described with reference to the following specific examples and accompanying drawings. It should be understood that the specific examples described below are for the purpose of illustrating the text invention only and are not intended to limit the invention. The described embodiments are only some of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained without creative work by those skilled in the art are within the scope of the present invention based on the embodiments of the present invention.
As shown in fig. 1, an activated carbon adsorption and desorption system is exemplarily described, which includes a first activated carbon adsorption tank 22, a second activated carbon adsorption tank 23, and an activated carbon adsorption unit, a steam desorption unit, a nitrogen desorption unit, and a temperature reduction and drying unit, which are respectively communicated with the first activated carbon adsorption tank 22 and the second activated carbon adsorption tank 23 through pipes and valves; wherein,
the active carbon adsorption unit comprises a first surface cooler 2 and an induced draft fan 19, wherein the inlet of the first surface cooler 2 is communicated with a waste gas inlet pipeline through a waste gas inlet valve 1, the outlet of the first surface cooler is communicated with a first active carbon adsorption tank 22 through a first air inlet valve 3 and is communicated with a second active carbon adsorption tank 23 through a second air inlet valve 11, and the induced draft fan 19 is communicated with the first active carbon adsorption tank 22 through a first exhaust valve 4 and is communicated with the second active carbon adsorption tank 23 through a second exhaust valve 12 to form a two-tank single-stage granular active carbon adsorption passage;
the steam desorption unit comprises a first desorption steam inlet valve 5 and a first desorption exhaust valve 6, wherein steam ports of the first desorption steam inlet valve and the first desorption exhaust valve 6 are respectively communicated with a first activated carbon adsorption tank 22 through pipelines, and a second desorption steam inlet valve 13 and a second desorption exhaust valve 14 are communicated with a second activated carbon adsorption tank 23 to form a one-way steam desorption passage;
the cooling and drying unit comprises a first nitrogen air inlet valve 7 and a first nitrogen air outlet valve 8, wherein nitrogen openings of the first nitrogen air inlet valve and the first nitrogen air outlet valve are respectively communicated with a first activated carbon adsorption tank 22 through pipelines, and a second nitrogen air inlet valve 15 and a second nitrogen air outlet valve 16 are communicated with a second activated carbon adsorption tank 23, and the first nitrogen air outlet valve 8 and the second nitrogen air outlet valve 16 are communicated with an inlet of the first surface air cooler 2 through pipelines to form a nitrogen cooling and drying passage;
the air-cooling drying system further comprises a cooling fan 20 communicated with the first active carbon adsorption tank 22 through a first cooling air inlet valve 9 and communicated with the second active carbon adsorption tank 23 through a second cooling air inlet valve 17, a second surface air cooler 21 communicated with the first active carbon adsorption tank 22 through a first cooling exhaust valve 10 and communicated with the second active carbon adsorption tank 23 through a second cooling exhaust valve 18, and the cooling fan 20 and the second surface air cooler 21 are communicated with each other to form a cooling air cooling and drying circulation loop.
In one embodiment, the first activated carbon adsorption tank 22 and the second activated carbon adsorption tank 23 are both provided with a plurality of granular activated carbon layers, and the tank bodies are both provided with an exhaust gas inlet channel to the bottoms thereof.
In one embodiment, the first desorption exhaust valve 6 is located at the bottom of the first activated carbon adsorption tank 22, and the second desorption exhaust valve 14 is located at the bottom of the second activated carbon adsorption tank 23.
The process for treating the ketone volatile organic compound tail gas by the activated carbon adsorption and desorption system comprises the following steps of performing activated carbon adsorption, steam desorption, nitrogen combined cooling air cooling and drying treatment on the ketone volatile organic compound tail gas by the activated carbon adsorption and desorption system:
(1) adsorption: after the ketone volatile organic compound tail gas is cooled by the first surface air cooler 2, the ketone volatile organic compound tail gas is respectively introduced into the first activated carbon adsorption tank 22 and the second activated carbon adsorption tank 23 for granular activated carbon adsorption, and flows out through the induced draft fan 19 after the adsorption is saturated;
(2) desorption: after the adsorption saturation in the step (1), activating and regenerating the first activated carbon adsorption tank 22 and the second activated carbon adsorption tank 23 through a steam desorption unit, desorbing and purging organic matters adsorbed and concentrated on the granular activated carbon by the decompressed saturated steam, and recovering the desorbed steam and the condensate for post-treatment;
(3) cooling and drying: and blowing the desorbed active carbon by inert gas nitrogen and/or cooling air until the temperature is reduced and the active carbon is dried to meet the adsorption requirement of the waste active carbon.
In some embodiments, the first activated carbon adsorption tank 22 and the second activated carbon adsorption tank 23 can be switched automatically by controlling the switch of the valve to alternately perform the adsorption, desorption, temperature reduction and drying processes, and the processes are cycled until the ketone volatile organic compound tail gas reaches the standard and is discharged.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (3)
1. An activated carbon adsorption and desorption system is characterized by comprising a first activated carbon adsorption tank, a second activated carbon adsorption tank, an activated carbon adsorption unit, a steam desorption unit, a nitrogen desorption unit and a cooling and drying unit, wherein the activated carbon adsorption unit, the steam desorption unit, the nitrogen desorption unit and the cooling and drying unit are respectively communicated with the first activated carbon adsorption tank and the second activated carbon adsorption tank through pipelines and valves; wherein,
the active carbon adsorption unit comprises a first surface cooler and an induced draft fan, wherein an inlet of the first surface cooler is communicated with a waste gas inlet pipeline through a waste gas inlet valve, an outlet of the first surface cooler is communicated with the first active carbon adsorption tank through a first air inlet valve respectively, and is communicated with the second active carbon adsorption tank through a second air inlet valve respectively, and the induced draft fan is communicated with the first active carbon adsorption tank through a first exhaust valve and is communicated with the second active carbon adsorption tank through a second exhaust valve respectively to form a two-tank single-stage granular active carbon adsorption passage;
the steam desorption unit comprises a first desorption steam inlet valve and a first desorption exhaust valve, wherein steam ports of the first desorption steam inlet valve and the first desorption exhaust valve are respectively communicated with the first activated carbon adsorption tank through pipelines, and a second desorption steam inlet valve and a second desorption exhaust valve are communicated with the second activated carbon adsorption tank to form a one-way steam desorption passage;
the cooling and drying unit comprises a first nitrogen air inlet valve and a first nitrogen air outlet valve, wherein nitrogen openings of the first nitrogen air inlet valve and the first nitrogen air outlet valve are respectively communicated with the first activated carbon adsorption tank through pipelines, and a second nitrogen air inlet valve and a second nitrogen air outlet valve are communicated with the second activated carbon adsorption tank, and the first nitrogen air outlet valve and the second nitrogen air outlet valve are communicated with the inlet of the first surface air cooler through pipelines to form a nitrogen cooling and drying passage;
still including respectively through first cooling intake valve with first active carbon adsorption jar intercommunication with through second cooling intake valve with the cooling blower of second active carbon adsorption jar intercommunication, through first cooling exhaust valve with first active carbon adsorption jar intercommunication with through second cooling exhaust valve with the second surface cooler of second active carbon adsorption jar intercommunication, just cooling blower with the second surface cooler communicates each other, forms cooling air cooling drying cycle return circuit.
2. The system according to claim 1, wherein the first activated carbon adsorption tank and the second activated carbon adsorption tank are provided with a plurality of granular activated carbon layers, and a waste gas inlet channel is arranged in the tank body to the bottom of the tank body.
3. The system according to claim 1, wherein the first desorption exhaust valve is located at the bottom of the first activated carbon adsorption tank, and the second desorption exhaust valve is located at the bottom of the second activated carbon adsorption tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202120465000.4U CN214598073U (en) | 2021-03-03 | 2021-03-03 | Desorption system is inhaled to active carbon |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120465000.4U CN214598073U (en) | 2021-03-03 | 2021-03-03 | Desorption system is inhaled to active carbon |
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| CN214598073U true CN214598073U (en) | 2021-11-05 |
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- 2021-03-03 CN CN202120465000.4U patent/CN214598073U/en active Active
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