CN216136962U - Workshop organic waste gas recovery processing system - Google Patents
Workshop organic waste gas recovery processing system Download PDFInfo
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- CN216136962U CN216136962U CN202121859244.7U CN202121859244U CN216136962U CN 216136962 U CN216136962 U CN 216136962U CN 202121859244 U CN202121859244 U CN 202121859244U CN 216136962 U CN216136962 U CN 216136962U
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Abstract
The utility model discloses a workshop organic waste gas recovery processing system and a recovery processing method, which belong to the technical field of waste gas treatment, and comprise a waste gas concentration device, a water removal device, a normal temperature cooler, a four-way heat exchanger, a low temperature cooler and an organic solvent storage tank which are sequentially connected; the workshop organic waste gas pipeline is connected with a waste gas concentration device, and a desorption area, an adsorption area and a cooling area are arranged in the waste gas concentration device. The waste gas recovery treatment system of the utility model recovers the organic waste gas at low temperature, and can effectively inhibit the problem of organic gas decomposition by heating; no hazardous waste is generated in the treatment process, the concentrated waste gas can be condensed to recover the organic solvent, the operation cost is low, no secondary pollution is caused, the energy can be saved, and the economic value and the social benefit are high.
Description
Technical Field
The utility model belongs to the technical field of waste gas treatment, and particularly relates to a workshop organic waste gas recovery treatment system.
Background
In the chemical production industry, organic waste gas generated in a workshop mainly comprises hydrocarbon compounds, benzene and benzene compounds, alcohols, ketones, phenols, esters, amines, cyanides and other organic gas compounds, most of the organic waste gas has toxicity and great harm to human health of workshop operators, and if the organic waste gas is directly discharged into the air, the organic waste gas also causes great environmental pollution, so that the organic waste gas in the workshop must be recycled.
Among the current organic waste gas recovery processing technique, its rationale all adopts activated carbon adsorption, then carries out desorption condensation and retrieves the solvent, and this kind of recovery processing technique can produce a large amount of activated carbon dangers useless, and the useless processing degree of difficulty of danger is big, and the expense is high, causes secondary pollution easily, can not reach real exhaust-gas treatment effect.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a workshop organic waste gas recovery processing system and a recovery processing method, which aim to solve the technical problems in the background technology.
In order to achieve the purpose, the utility model discloses a workshop organic waste gas recovery processing system, which comprises a waste gas concentration device, a water removal device, a normal temperature cooler, a four-way heat exchanger, a low temperature cooler and an organic solvent storage tank which are connected in sequence; the workshop organic waste gas pipeline is connected with a waste gas concentration device, a desorption area, an adsorption area and a cooling area are arranged in the waste gas concentration device, and the desorption area is connected with an inlet of a dewatering device;
the waste concentration device is made of non-combustible materials, can heat organic waste gas by air, has a good waste gas treatment effect, is safe and reliable, and can be recycled;
the four-way heat exchanger is positioned between the normal-temperature cooler and the low-temperature cooler, plays a role in heat exchange, and mainly utilizes low-temperature gas coming out of the low-temperature cooler to carry out heat exchange on the gas coming out of the normal-temperature cooler, so that the normal-temperature gas is cooled in advance, and the energy-saving effect is achieved.
The four-way heat exchanger comprises two inlets and two outlets, wherein the two inlets are respectively a first gas medium inlet and a second gas medium inlet, and the two outlets are respectively a first gas medium outlet and a second gas medium outlet; the low-temperature cooler comprises an inlet and two outlets, wherein the two outlets are a gas outlet and a liquid outlet respectively;
the outlet of the dewatering device is connected with the inlet of the normal temperature cooler; the outlet of the normal temperature cooler is connected with the first gas medium inlet of the four-way heat exchanger, the first gas medium outlet of the four-way heat exchanger is connected with the inlet of the low-temperature cooler, the second gas medium outlet of the four-way heat exchanger is connected with the cooling area in the waste gas concentration device, the gas outlet of the low-temperature cooler is connected with the second gas medium inlet of the four-way heat exchanger, and the liquid outlet of the low-temperature cooler is connected with the organic solvent storage tank.
Furthermore, a waste liquid outlet is arranged at the bottom of the four-way heat exchanger and connected with an organic solvent storage tank.
Further, water trap is including the N water trap that sets up side by side, and N water trap's import department and exit are provided with the valve respectively, and N ≧ 2.
Further, N is 2.
Further, be equipped with moisture detector and PLC in the workshop organic waste gas recovery processing system, the moisture detector links to each other with two water trap respectively, and PLC links to each other with the valve in moisture detector and two water trap import and exit respectively. The moisture detector can monitor the moisture content in the water removal device in real time, and after the moisture content is saturated, the standby water removal device is switched, so that the water removal effect can be improved.
Further, be equipped with temperature sensor and PLC among the workshop organic waste gas recovery processing system, temperature sensor links to each other with two water trap respectively, and PLC links to each other with the valve in temperature sensor and two water trap import and exit respectively. Because the water removal device has a heat release effect in the water removal process, whether the water removal device needs to be switched for use can be judged according to the temperature change in the water removal device.
Further, the operating pressure of the normal temperature cooler is normal pressure; the operation pressure of the four-way heat exchanger is normal pressure.
Further, the operating pressure of the low-temperature cooler is normal pressure, and the operating temperature is-80 ℃ to-20 ℃.
Further, the operating pressure of the low-temperature cooler is normal pressure, and the operating temperature is-40 ℃.
The workshop organic waste gas recovery treatment can treat the most common VOCs in the workshop organic waste gas, the VOCs are liquid at normal temperature and do not self-polymerize, and the boiling point is lower than 200 ℃.
A workshop organic waste gas recovery processing method uses the workshop organic waste gas recovery processing system, and comprises the following steps:
(1) the workshop organic waste gas enters a waste gas concentration device through a waste gas pipeline, firstly enters an adsorption zone in the waste gas concentration device, and is subjected to adsorption treatment in the adsorption zone, so that the waste gas reaching the standard is directly discharged;
(2) after the adsorption zone is saturated through adsorption for a period of time, the waste gas concentration device rotates to enter the desorption zone, and the desorbed high-concentration organic waste gas enters the water removal device;
(3) the waste gas after being subjected to water removal treatment by the water removal device enters a normal temperature cooler, and enters a four-way heat exchanger through a first gas medium inlet after the waste gas is cooled to normal temperature;
(4) the normal-temperature waste gas entering the four-way heat exchanger is cooled after heat exchange, and the cooled waste gas enters the low-temperature cooler through the first gas medium outlet;
(5) part of the waste gas entering the low-temperature cooler in the step (4) is condensed into liquid, the liquid enters the organic solvent storage tank through the liquid outlet, and the waste gas which is not condensed into liquid sequentially enters the four-way heat exchanger through the gas outlet and the second gas inlet of the four-way heat exchanger;
(6) the low-temperature waste gas which is output by the low-temperature cooler and enters the four-way heat exchanger through the second medium inlet in the step (5) exchanges heat with the normal-temperature waste gas which is output by the normal-temperature cooler and enters the four-way heat exchanger through the first gas medium inlet, the cooled waste gas after heat exchange enters the low-temperature cooler through the first gas medium outlet, and the heated waste gas after heat exchange enters a cooling area of the waste gas concentration device through the second gas medium outlet;
(7) and (4) cooling the waste gas entering the cooling area of the waste gas concentration device in the step (6), then passing the cooled waste gas and newly input workshop organic waste gas through the adsorption area of the waste gas concentration device, performing adsorption treatment again, discharging after reaching a discharge standard, rotating the waste gas concentration device after the adsorption area is saturated, entering a desorption area, desorbing in the desorption area, and then performing dewatering, heat exchange and cooling treatment in a circulating manner.
In the utility model, gas entering the four-way heat exchanger through the first gas medium inlet in the normal temperature cooler and gas entering the four-way heat exchanger through the second gas medium inlet in the low temperature cooler respectively enter different gas pipelines of the four-way heat exchanger, the temperature of gas discharged from the normal temperature cooler is 20-30 ℃, and the temperature of gas output from the low temperature cooler is about-30 ℃ to-40 ℃, so that in the four-way heat exchanger, the gas entering from the low temperature cooler can pre-cool the gas entering from the normal temperature cooler in advance.
Therefore, more gas is directly condensed into liquid in the four-way heat exchanger and enters the organic solvent storage tank; the temperature of the gas in the four-way heat exchanger is reduced, the temperature of the gas entering the cooling area of the low-temperature cooler and the waste gas concentration device from the four-way heat exchanger is also reduced, the energy consumed by the four-way heat exchanger, the low-temperature cooler and the waste gas concentration device for reducing the gas temperature is saved, and the four-way heat exchanger has the advantage of saving energy.
Compared with the prior art, the organic waste gas recovery processing system and the recovery processing method have the following advantages:
(1) according to the organic waste gas recovery treatment system and the recovery treatment method, active carbon is not needed, no hazardous waste is generated, the concentrated waste gas is directly condensed to recover the solvent, the operation cost is low, and better economic value and social benefit are shown.
(2) In the organic waste gas recovery processing system and the recovery processing method, the low-temperature processing technology is adopted, so that the problem that part of organic gas is decomposed by heating can be effectively inhibited.
(3) In the utility model, the gas exhausted from the low-temperature cooler enters the four-way heat exchanger again, and the gas in the four-way heat exchanger can be precooled in advance, so that the energy consumed by the treatment system for reducing the gas temperature is saved, and the advantage of saving energy is achieved.
(3) The organic waste gas recovery processing system and the recovery processing method have wide application range, and have excellent recovery processing effect on organic waste gas which cannot be processed by a combustion method and unheated organic waste gas.
(4) The organic waste gas recovery treatment system and the recovery treatment method do not need to use a large amount of activated carbon for adsorption, do not generate hazardous waste, and do not have secondary pollution.
Drawings
FIG. 1 is a schematic structural diagram of a workshop organic waste gas recovery processing system in the utility model.
Wherein: 1-a waste gas concentration device; 11-a desorption zone; 12-an adsorption zone; 13-a cooling zone; 2-a water removal device; 21-a first water removal device; 22-a second water removal device; 3-a normal temperature cooler; a 4-four-way heat exchanger; 5-a cryocooler; 6-organic solvent storage tank; 7-online moisture detector; 8-PLC.
Detailed Description
The technical solution of the present invention will be described in detail by the following specific examples.
Example 1
Fig. 1 is a schematic structural diagram of a recovery processing system for organic waste gas from a vehicle in embodiment 1.
The workshop organic waste gas recovery processing system comprises a waste gas concentration device 1, a dewatering device 2, a normal temperature cooler 3, a four-way heat exchanger 4, a low temperature cooler 5 and an organic solvent storage tank 6 which are connected in sequence; the workshop organic waste gas pipeline is connected with the waste gas concentration device 1, a desorption area 11, an adsorption area 12 and a cooling area 13 are arranged in the waste gas concentration device, and the desorption area 11 is connected with an inlet of the dewatering device 2; the outlet of the dewatering device 2 is connected with the inlet of the normal temperature cooler 3;
wherein the dewatering device 2 comprises two dewatering devices arranged in parallel, namely a first dewatering device 21 and a second dewatering device 22, one of the two dewatering devices 2 is used and one is standby, and valves are respectively arranged at the inlet and the outlet of the two dewatering devices 2. Still be equipped with moisture detector and PLC8 in this workshop organic waste gas recovery processing system, specifically, the moisture detector is online moisture detector 7, and online moisture detector 7 links to each other with two water trap 2 respectively, and PLC8 links to each other with online moisture detector 7 respectively and the valve in two water trap 2 imports and the exit.
In the working process of the system, the first water removal device 21 is set to be in use, the second water removal device 22 is in standby, the online moisture detector 7 monitors the moisture content in the first water removal device 21 in use in real time, and feeds moisture content data back to the PLC8 in real time, when the moisture content reaches a set value, the PLC8 controls valves arranged at the inlets and outlets of the two water removal devices 2 to switch, and waste gas enters the second water removal device 22 for water removal treatment; similarly, when the moisture content in the second water removal device 22 reaches the set value, the PLC8 controls the valve to switch to perform the water removal process on the exhaust gas by using the first water removal device 21.
When the first water removal device 21 or the second water removal device 22 absorbs water and is saturated, it is necessary to perform dehydration treatment, and the first water removal device 21 or the second water removal device 22 is heated to evaporate the adsorbed water and discharge the water into the air in the form of water vapor.
In the dehydration treatment process, a moisture detector can be used for monitoring the moisture content in the first dehydration device 21 or the second dehydration device 22, when the moisture content is reduced to a set value, the heating is stopped, and the dehydration treatment is finished, so that the dehydration process carried out by the dehydration treatment method is more thorough; meanwhile, the heating time can be set in advance in the dehydration treatment process, when the first dehydration device 21 or the second dehydration device 22 is heated for the set time, the heating is stopped, and the dehydration treatment is finished. In actual production, two dehydration methods can be combined for realizing better dehydration effect.
Through the moisture content in online moisture detector 7 real-time supervision water trap 2 to switch through PLC8 and use different water trap, can reach better dewatering effect.
The four-way heat exchanger 4 comprises two inlets and two outlets, wherein the two inlets are a first gas medium inlet and a second gas medium inlet respectively, and the two outlets are a first gas medium outlet and a second gas medium outlet respectively; the cryocooler 5 comprises an inlet and two outlets, wherein the two outlets are respectively a gas outlet and a liquid outlet;
the outlet of the normal temperature cooler 3 is connected with the first gas medium inlet of the four-way heat exchanger 4, the first gas medium outlet of the four-way heat exchanger 4 is connected with the inlet of the low temperature cooler 5, the second gas medium outlet of the four-way heat exchanger 4 is connected with the cooling area 13 in the waste gas concentration device 1, and the gas outlet of the low temperature cooler 5 is connected with the second gas inlet of the four-way heat exchanger 4;
a waste liquid outlet is arranged at the bottom of the four-way heat exchanger 4 and is connected with an organic solvent storage tank 6, and a liquid outlet of the low-temperature cooler 5 is also connected with the organic solvent storage tank 6;
the operating pressure of the normal temperature cooler 3 is normal pressure; the operation pressure of the four-way heat exchanger 4 is normal pressure; the operating pressure of the cryocooler 5 is atmospheric and the operating temperature is-40 ℃.
When the workshop organic waste gas recovery processing system in embodiment 1 is used for recovering and processing workshop organic waste gas, the recovery processing method includes the following steps:
(1) the workshop organic waste gas enters the waste gas concentration device 1 through a waste gas pipeline, firstly enters an adsorption area 12 in the waste gas concentration device 1, and after adsorption treatment in the adsorption area 12, the waste gas reaches the standard and is discharged;
(2) after the adsorption zone 12 is saturated after a period of time, the waste gas concentration device 1 rotates and enters the desorption zone 11, and the desorbed high-concentration organic waste gas enters the water removal device 2;
(3) the waste gas after being subjected to the water removal treatment by the water removal device 2 enters a normal temperature cooler 3, and enters a four-way heat exchanger 4 through a first gas medium inlet after the waste gas is cooled to normal temperature;
(4) the normal-temperature waste gas entering the four-way heat exchanger 4 is cooled after heat exchange, and the cooled waste gas enters the low-temperature cooler 5 through the first gas medium outlet;
(5) part of the waste gas entering the low-temperature cooler 5 in the step (4) is condensed into liquid, the liquid enters the organic solvent storage tank 6 through the liquid outlet, and the waste gas which is not condensed into liquid sequentially enters the four-way heat exchanger 4 through the gas outlet and the second gas inlet of the four-way heat exchanger;
(6) in the step (5), the low-temperature waste gas which is output by the low-temperature cooler 5 and enters the four-way heat exchanger 4 through the second medium inlet exchanges heat with the normal-temperature waste gas which is output by the normal-temperature cooler 3 and enters the four-way heat exchanger 4 through the first gas medium inlet, the cooled waste gas after heat exchange enters the low-temperature cooler 5 through the first gas medium outlet, and the heated waste gas after heat exchange enters the cooling area 13 of the waste gas concentration device 1 through the second gas medium outlet;
(7) and (4) after the waste gas entering the cooling area 13 of the waste gas concentration device 1 in the step (6) is cooled, the waste gas and newly input workshop organic waste gas pass through the adsorption area 12 of the waste gas concentration device 1 together, adsorption treatment is carried out again, the waste gas can be discharged after reaching the discharge standard, after the adsorption area 12 is saturated in adsorption, the waste gas concentration device rotates and enters the desorption area 11, the desorption area 11 carries out desorption, and then water removal, heat exchange and cooling treatment are carried out in a circulating mode.
The organic waste gas is circularly treated for multiple times in the steps (1) to (7) until the waste gas reaches the emission standard and can be discharged into the atmosphere; or the organic solvent is condensed into liquid and enters the organic solvent storage tank 6, so that the organic solvent can be recovered.
The types of organic waste gases that can be treated by the workshop organic waste gas recovery processing system in embodiment 1 include ethyl acetate, ethanol, butanone, methylcyclohexane, isopropanol, propyl ester, toluene, butyl ester, etc., the maximum treatment concentration can reach 1000ppm, the treatment efficiency can reach 99%, and the organic waste gases are dischargedThe content of non-methane total hydrocarbons in the waste gas is 40mg/m3The following.
Example 2
The workshop organic waste gas recovery processing system in embodiment 2 has basically the same structure as that of embodiment 1, except that the online moisture detector 7 is replaced by a temperature sensor, the temperature sensor can monitor the temperature and the temperature change in the water removal device in real time, and when the temperature change reaches a set value, the PLC controls the valves arranged at the inlet and the outlet of the two water removal devices to switch so as to improve the water removal effect.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like made within the design concept of the present invention should be included in the scope of the present invention.
Claims (9)
1. The utility model provides a workshop organic waste gas recovery processing system which characterized in that:
the system comprises a waste gas concentration device, a dewatering device, a normal temperature cooler, a four-way heat exchanger, a low temperature cooler and an organic solvent storage tank which are connected in sequence; the workshop organic waste gas pipeline is connected with a waste gas concentration device, a desorption area, an adsorption area and a cooling area are arranged in the waste gas concentration device, and the desorption area is connected with an inlet of a dewatering device;
the four-way heat exchanger comprises two inlets and two outlets, wherein the two inlets are respectively a first gas medium inlet and a second gas medium inlet, and the two outlets are respectively a first gas medium outlet and a second gas medium outlet; the low-temperature cooler comprises an inlet and two outlets, wherein the two outlets are a gas outlet and a liquid outlet respectively;
the outlet of the dewatering device is connected with the inlet of the normal temperature cooler; the outlet of the normal temperature cooler is connected with the first gas medium inlet of the four-way heat exchanger, the first gas medium outlet of the four-way heat exchanger is connected with the inlet of the low-temperature cooler, the second gas medium outlet of the four-way heat exchanger is connected with the cooling area in the waste gas concentration device, the gas outlet of the low-temperature cooler is connected with the second gas medium inlet of the four-way heat exchanger, and the liquid outlet of the low-temperature cooler is connected with the organic solvent storage tank.
2. The plant organic waste gas recovery processing system of claim 1, characterized in that: and a waste liquid outlet is arranged at the bottom of the four-way heat exchanger and is connected with an organic solvent storage tank.
3. The plant organic waste gas recovery processing system of claim 1, characterized in that: the dewatering device comprises N dewatering devices arranged in parallel, valves are respectively arranged at the inlet and the outlet of the N dewatering devices, and N is not less than 2.
4. The plant organic waste gas recovery processing system of claim 3, characterized in that: and N is 2.
5. The plant organic waste gas recovery processing system of claim 4, characterized in that: be equipped with moisture detector and PLC among the workshop organic waste gas recovery processing system, the moisture detector links to each other with two water trap respectively, and PLC links to each other with the valve in moisture detector and two water trap import and exit respectively.
6. The plant organic waste gas recovery processing system of claim 4, characterized in that: be equipped with temperature sensor and PLC among the workshop organic waste gas recovery processing system, temperature sensor links to each other with two water trap respectively, and PLC links to each other with the valve in temperature sensor and two water trap import and exit respectively.
7. The plant organic waste gas recovery processing system of claim 1, characterized in that: the operating pressure of the normal-temperature cooler is normal pressure; the operation pressure of the four-way heat exchanger is normal pressure.
8. The plant organic waste gas recovery processing system of claim 1, characterized in that: the operating pressure of the low-temperature cooler is normal pressure, and the operating temperature is-80 ℃ to-20 ℃.
9. The plant organic waste gas recovery processing system of claim 8, characterized in that: the operating pressure of the low-temperature cooler is normal pressure, and the operating temperature is-40 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121859244.7U CN216136962U (en) | 2021-08-10 | 2021-08-10 | Workshop organic waste gas recovery processing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121859244.7U CN216136962U (en) | 2021-08-10 | 2021-08-10 | Workshop organic waste gas recovery processing system |
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| CN216136962U true CN216136962U (en) | 2022-03-29 |
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| CN202121859244.7U Active CN216136962U (en) | 2021-08-10 | 2021-08-10 | Workshop organic waste gas recovery processing system |
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- 2021-08-10 CN CN202121859244.7U patent/CN216136962U/en active Active
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