CN217549422U - Shallow cold adsorption desorption VOCs gas recovery device - Google Patents
Shallow cold adsorption desorption VOCs gas recovery device Download PDFInfo
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- CN217549422U CN217549422U CN202221737953.2U CN202221737953U CN217549422U CN 217549422 U CN217549422 U CN 217549422U CN 202221737953 U CN202221737953 U CN 202221737953U CN 217549422 U CN217549422 U CN 217549422U
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Abstract
A shallow cold adsorption and desorption VOCs gas recovery device comprises a closed collection and pretreatment unit, a condensation unit and an adsorption and desorption unit, wherein the condensation unit comprises a shallow cold heat exchanger for performing shallow cold cooling on VOCs gas, the hot inlet end of the shallow cold heat exchanger is communicated with the closed collection and pretreatment unit, the hot outlet end of the shallow cold heat exchanger is communicated with the adsorption and desorption unit, the cold inlet end and the cold outlet end of the shallow cold heat exchanger are externally connected with a low-temperature circulation liquid pipeline, and the hot cavity of the shallow cold heat exchanger is also communicated with a recovery liquid tank for containing VOCs gas condensate; the adsorption and desorption unit comprises an adsorption unit and a desorption unit, the inlet end of the adsorption unit is communicated with the hot outlet end of the shallow cooling heat exchanger, the outlet end of the adsorption unit is externally connected with an exhaust funnel, the desorption unit comprises a vacuum desorption pump and an adsorption and desorption heat exchanger, and the vacuum desorption pump is communicated between the adsorption unit and the adsorption and desorption heat exchanger. The stable standard-reaching treatment process has high safety, is environment-friendly and energy-saving, and can realize the gas VOCs.
Description
Technical Field
The utility model relates to a gaseous recovery technical field of VOCs, especially a gaseous recovery unit of shallow cold adsorption desorption VOCs.
Background
Along with the increasing of the national improvement of environmental protection, various standard standards are improved, and particularly after GB 31570/1/2-2015 is officially released and executed, domestic treatment standards for VOCs gas are changed from gram-level to milligram-level. A plurality of atmospheric control enterprises in the industry carry out deep optimization on the original process design flow and carry out a plurality of project practices, and practical feedback from several years proves that the treatment effect of the current process treatment flow on the VOCs industry is insufficient, process equipment has a plurality of problems, and the requirements on the concentration of exhaust emission are increasingly strict along with the establishment of environmental protection regulations in each central enterprise along with the coming of standards of all parts.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that to prior art not enough, provide a high, environmental protection and energy saving, can realize stabilizing the gaseous recovery unit of shallow cold adsorption desorption VOCs of up to standard processing technology of security.
The technical problem to be solved by the utility model is realized through the following technical scheme. The utility model relates to a shallow cold adsorption desorption VOCs gas recovery unit, it is including the airtight collection and the preprocessing unit that are used for splendid attire VOCs gas, a condensing unit that is used for carrying out shallow cold processing to VOCs gas and an absorption desorption unit that is used for VOCs gas after shallow cold processing to carry out deep adsorption processing, condensing unit is including the shallow cold heat exchanger that is used for carrying out shallow cold cooling to VOCs gas, the heat inlet end and the airtight collection of shallow cold heat exchanger and preprocessing unit intercommunication, the heat outlet end and the absorption desorption unit intercommunication of shallow cold heat exchanger, the external low temperature circulation fluid channel of the cold inlet end and the cold outlet end of shallow cold heat exchanger, still communicate on the hot chamber of shallow cold heat exchanger has the recovery that is used for splendid attire VOCs gas condensate liquid tank;
the adsorption and desorption unit comprises an adsorption unit and a desorption unit, the inlet end of the adsorption unit is communicated with the hot outlet end of the shallow cooling heat exchanger, the outlet end of the adsorption unit is externally connected with an exhaust funnel, the desorption unit comprises a vacuum desorption pump and an adsorption and desorption heat exchanger, the vacuum desorption pump is communicated between the adsorption unit and the adsorption and desorption heat exchanger, the hot inlet end of the adsorption and desorption heat exchanger is communicated with the vacuum desorption pump, the hot outlet end of the adsorption and desorption heat exchanger is communicated with the hot inlet end of the shallow cooling heat exchanger, the cold inlet end and the cold outlet end of the adsorption and desorption heat exchanger are externally connected with a low-temperature circulating liquid pipeline, and a condensate tank is further communicated with the hot cavity of the adsorption and desorption heat exchanger.
The utility model discloses the technical problem that will solve can also further realize through following technical scheme, to above shallow cold absorption desorption VOCs gas recovery unit still be provided with the induced air unit between airtight collection and preprocessing unit and condensation unit, the induced air unit is including being used for carrying out the draught fan that steps up and arranging the spark arrester of draught fan inlet pipeline in to VOCs gas.
The utility model discloses the technical problem that will solve can also further realize through following technical scheme, to above shallow cold absorption desorption VOCs gas recovery unit still be provided with between airtight collection and preprocessing unit and induced air unit and spray cooling unit and defogging unit.
The utility model discloses the technical problem that will solve can also further realize through following technical scheme, to above shallow cold absorption desorption VOCs gas recovery unit, still be provided with the desulfurization unit between condensing unit and absorption desorption unit.
The utility model discloses the technical problem that will solve can also further realize through following technical scheme, to above shallow cold absorption desorption VOCs gas recovery unit, airtight collection and preprocessing unit are electrostatic precipitator or buffering dehumidification jar.
The utility model discloses the technical problem that will solve can also further realize through following technical scheme, to above shallow cold adsorption desorption VOCs gas recovery unit, shallow cold heat exchanger is provided with 2, the parallelly connected setting of 2 shallow cold heat exchangers.
The utility model discloses the technical problem that will solve can also further realize through following technical scheme, to above shallow cold adsorption desorption VOCs gas recovery unit, the adsorption unit includes the parallelly connected activated carbon adsorption tank that sets up of 2.
Compared with the prior art, the utility model discloses a shallow cold desorption mode of inhaling handles VOCs gas, can reach present internal most strict emission standard, and characteristics are as follows:
1. is always in a normal pressure running state;
2. the shallow cooling mode is adopted, the temperature of the system can be as low as-50 ℃ to 10 ℃, and the standard emission requirement of more rigorous gas coming conditions is met;
3. the safety and explosion prevention are realized, the running state is always in a low-temperature working condition, and the safety and the reliability are realized;
4. the exhaust emission index is good, and after treatment, the exhaust emission concentration is lower than the national emission standard of 120mg/m 3 The lowest controllable value is 60mg/m 3 The strictest landmark requirements in China are met;
5. the application range is wide, the method is suitable for the treatment working conditions of most VOCs gases, the treatment effect on the VOCs gases containing light components is good, and the problem of accumulation of the light components in the treatment process can be avoided;
6. a large amount of oil products are not needed to be sprayed circularly, so that the secondary artificial volatilization loss of VOCs gas is avoided;
7. the process adopts a pure physical mode, the gas-liquid phase change conversion is safe and reliable, and high-temperature exothermic reaction does not exist.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural view of the adsorption and desorption unit of the present invention.
Detailed Description
To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the attached drawings of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are part of the embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-2, a shallow cold adsorption desorption VOCs gas recovery device can carry out shallow cold adsorption desorption to VOCs gas and handle, specifically is: collected VOCs gas → pretreatment process (buffer dehumidification tank) → induced draft fan unit → desulfurization unit 3 (optional) → condensation unit → adsorption and desorption unit → tail gas discharge after reaching standards;
the device comprises a closed collecting and preprocessing unit 1 for containing VOCs gas, a condensing unit for carrying out shallow cooling treatment on the VOCs gas and an absorbing and desorbing unit for carrying out deep adsorption treatment on the VOCs gas after the shallow cooling treatment, wherein the closed collecting and preprocessing unit 1 is used for carrying out effective closed collection on the VOCs gas according to the volatile organic compound unorganized emission control standard GB37822-2019 standard, incoming gas with high dust content needs to be subjected to dust removal treatment, filtering dust removal can be adopted, and electrostatic dust removal or buffering dehumidification can be adopted if the incoming gas is high in temperature, high in pressure and high in humidity; preferably, the closed collecting and pretreating unit 1 is an electrostatic dust removing or buffering dehumidifying tank;
the condensing unit comprises a shallow cooling heat exchanger 4 for performing shallow cooling on the VOCs gas, the hot inlet end of the shallow cooling heat exchanger 4 is communicated with the closed collecting and preprocessing unit 1, the hot outlet end of the shallow cooling heat exchanger 4 is communicated with the absorption and desorption unit, the cold inlet end and the cold outlet end of the shallow cooling heat exchanger 4 are externally connected with a low-temperature circulating liquid pipeline, and the shallow cooling heat exchanger 4 is used for providing sufficient cold quantity required by the VOCs gas cooling and adopts a shallow cooling mode; condensation temperature range: 10 ℃ to-30 ℃; the temperature set by the condensation unit needs to be within the range of minus 30 to 10 ℃ according to the components of the oil gas material to be treated, and the low-temperature tail gas after primary condensation is used as a gas source for subsequent deep adsorption treatment, so that the adsorption efficiency can be effectively improved; the condensing unit can consider double-flow-channel configuration according to specific material conditions, and the flow channel switching is based on operation accumulated time or a pressure loss value of a flow channel of a heat exchanger, for example, 2 shallow cooling heat exchangers 4 are arranged, and 2 shallow cooling heat exchangers are arranged in parallel; the shallow cooling heat exchanger 4 is provided with pressure and temperature field instruments and necessary sampling ports, important running state parameters are monitored at any time and stored in an external PLC (programmable logic controller);
the hot cavity of the shallow cooling heat exchanger 4 is also communicated with a recovery liquid tank 5 for containing VOCs gas condensate, the condensate generated in the shallow cooling heat exchanger 4 is temporarily stored in the recovery liquid tank 5, an oil product can be conveyed to a user-specified area through an external oil conveying pump, and a small amount of oil product flows back to an inlet pipe section to form (near) saturated oil gas concentration;
the adsorption and desorption unit comprises an adsorption unit 7 and a desorption unit, the inlet end of the adsorption unit 7 is communicated with the hot outlet end of the shallow cooling heat exchanger 4, the outlet end of the adsorption unit 7 is externally connected with an exhaust funnel 8, the desorption unit comprises a vacuum desorption pump and an adsorption and desorption heat exchanger 6, the vacuum desorption pump is communicated between the adsorption unit 7 and the adsorption and desorption heat exchanger 6, the hot inlet end of the adsorption and desorption heat exchanger 6 is communicated with the vacuum desorption pump, the hot outlet end of the adsorption and desorption heat exchanger 6 is communicated with the hot inlet end of the shallow cooling heat exchanger 4, the cold inlet end and the cold outlet end of the adsorption and desorption heat exchanger 6 are externally connected with a low-temperature circulating liquid pipeline, and the hot cavity of the adsorption and desorption heat exchanger 6 is also communicated with a condensate tank; preferably, the adsorption unit 7 comprises 2 activated carbon adsorption tanks which are arranged in parallel, and the activated carbon adsorption tanks are used for standby and run alternately; the gas condensed by the condensing unit enters an adsorption and desorption unit, and the adsorbed gas reaches the standard and is discharged; when the designed adsorption period is reached, adsorbent regeneration is needed, a vacuum desorption mode of a vacuum desorption pump 9 is adopted, the desorbed concentrated tail gas enters an absorption and desorption heat exchanger 6 for cooling, the condensate enters a condensate tank, the non-condensable gas flows back to an air inlet main pipeline of a condensing unit, and the condensate enters the condensing unit again for cooling treatment; condensation temperature range of the adsorption and desorption heat exchanger 6: -50 ℃ to 10 ℃.
Still be provided with induced air unit 2 between airtight collection and pretreatment unit 1 and the condensing unit, induced air unit 2 is used for the gaseous processing that steps up of VOCs, simultaneously also provide power for the gaseous removal of VOCs, make airtight collection and the gaseous condensing unit that can constantly input of VOCs in the pretreatment unit 1, induced air unit 2 is including being used for carrying out the draught fan that steps up and arranging draught fan inlet pipeline's spark arrester in to VOCs gas, still install the valve on relevant pipeline, the valve piece, on-line monitoring instrument etc., guarantee safety.
If VOCs gaseous temperature is higher, still need cool down the processing, still be provided with between airtight collection and preprocessing unit 1 and induced air unit 2 and spray cooling unit and defogging unit, can spray cooling and defogging processing to VOCs gas for the VOCs gas after the cooling gets into induced air unit 2 after carrying out the defogging.
If the VOCs gas to be treated contains sulfur-containing components, a desulfurization unit 3 can be arranged between the condensation unit and the adsorption and desorption unit and is used for performing desulfurization treatment on the VOCs gas; specifically, the desulfurization unit 3 is a dry desulfurization tower.
Claims (7)
1. The utility model provides a gaseous recovery unit of shallow cold adsorption desorption VOCs which characterized in that: the device comprises a closed collection and pretreatment unit for containing VOCs gas, a condensation unit for carrying out shallow cooling treatment on the VOCs gas and an absorption and desorption unit for carrying out deep adsorption treatment on the VOCs gas after the shallow cooling treatment, wherein the condensation unit comprises a shallow cooling heat exchanger for carrying out shallow cooling treatment on the VOCs gas, the hot inlet end of the shallow cooling heat exchanger is communicated with the closed collection and pretreatment unit, the hot outlet end of the shallow cooling heat exchanger is communicated with the absorption and desorption unit, the cold inlet end and the cold outlet end of the shallow cooling heat exchanger are externally connected with a low-temperature circulating liquid pipeline, and the hot cavity of the shallow cooling heat exchanger is also communicated with a recovery liquid tank for containing VOCs gas condensate;
the adsorption and desorption unit comprises an adsorption unit and a desorption unit, the inlet end of the adsorption unit is communicated with the hot outlet end of the shallow cooling heat exchanger, the outlet end of the adsorption unit is externally connected with an exhaust funnel, the desorption unit comprises a vacuum desorption pump and an adsorption and desorption heat exchanger, the vacuum desorption pump is communicated between the adsorption unit and the adsorption and desorption heat exchanger, the hot inlet end of the adsorption and desorption heat exchanger is communicated with the vacuum desorption pump, the hot outlet end of the adsorption and desorption heat exchanger is communicated with the hot inlet end of the shallow cooling heat exchanger, the cold inlet end and the cold outlet end of the adsorption and desorption heat exchanger are externally connected with a low-temperature circulating liquid pipeline, and a condensate tank is further communicated with the hot cavity of the adsorption and desorption heat exchanger.
2. The shallow cold adsorption and desorption VOCs gas recovery device of claim 1, which is characterized in that: still be provided with the induced air unit between airtight collection and pretreatment unit and condensation unit, the induced air unit is including being used for carrying out the draught fan that steps up and arranging the spark arrester of draught fan inlet pipeline in to VOCs gas.
3. The shallow cold adsorption and desorption VOCs gas recovery device of claim 2, wherein:
a spraying cooling unit and a demisting unit are also arranged between the closed collecting and preprocessing unit and the induced air unit.
4. The shallow cold adsorption and desorption VOCs gas recovery device of claim 1, wherein: a desulfurization unit is also arranged between the condensation unit and the adsorption and desorption unit.
5. The shallow cold adsorption and desorption VOCs gas recovery device of claim 1, wherein: the closed collecting and preprocessing unit is an electrostatic dust collection or buffering dehumidification tank.
6. The shallow cold adsorption and desorption VOCs gas recovery device of claim 1, wherein: the shallow cooling heat exchanger is provided with 2, and 2 shallow cooling heat exchangers are arranged in parallel.
7. The shallow cold adsorption and desorption VOCs gas recovery device of claim 1, wherein: the adsorption unit comprises 2 activated carbon adsorption tanks which are arranged in parallel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221737953.2U CN217549422U (en) | 2022-07-07 | 2022-07-07 | Shallow cold adsorption desorption VOCs gas recovery device |
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| CN202221737953.2U CN217549422U (en) | 2022-07-07 | 2022-07-07 | Shallow cold adsorption desorption VOCs gas recovery device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115089992A (en) * | 2022-07-07 | 2022-09-23 | 连云港市拓普科技发展有限公司 | Method for recycling VOCs (volatile organic compounds) gas through shallow cold adsorption desorption |
| CN115089992B (en) * | 2022-07-07 | 2024-05-10 | 连云港市拓普科技发展有限公司 | Shallow cooling adsorption and desorption VOCs gas recovery method |
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2022
- 2022-07-07 CN CN202221737953.2U patent/CN217549422U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115089992A (en) * | 2022-07-07 | 2022-09-23 | 连云港市拓普科技发展有限公司 | Method for recycling VOCs (volatile organic compounds) gas through shallow cold adsorption desorption |
| CN115089992B (en) * | 2022-07-07 | 2024-05-10 | 连云港市拓普科技发展有限公司 | Shallow cooling adsorption and desorption VOCs gas recovery method |
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