CN103830991B - The vacuum desorption system and method for organic solvent adsorption recovery - Google Patents
The vacuum desorption system and method for organic solvent adsorption recovery Download PDFInfo
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- CN103830991B CN103830991B CN201310697071.7A CN201310697071A CN103830991B CN 103830991 B CN103830991 B CN 103830991B CN 201310697071 A CN201310697071 A CN 201310697071A CN 103830991 B CN103830991 B CN 103830991B
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Abstract
The invention discloses a kind of vacuum desorption system and method for organic solvent adsorption recovery, it is related to the organic solvent adsorption recovery system of the sector applications such as medicine, petrochemical industry, new material.It includes the adsorbent bed of organic solvent, to the nitrogen purging device of adsorbent bed, the vacuum desorption device being desorbed to adsorbent bed, with the condensate recycling device reclaimed to the organic solvent after desorption, the vacuum desorption device is in series for multistage vacuum pump, and the flow of multistage vacuum pump successively decreases configuration in proportion.Successively decreased in proportion by flow the multi-stage vacuum series connection of pumps of configuration, the flow and desorption rate of vacuum desorption system can be increased substantially, so as to realize the balance of desorption rate and adsorption rate.
Description
Technical field
The present invention relates to a kind of desorption system of organic solvent adsorption recovery and method, especially a kind of vacuum desorption system and method for organic solvent adsorption recovery.
Background technology
In the organic solvent adsorption recovery system of the sector applications such as medicine, petrochemical industry, new material, a large amount of to be desorbed using low pressure water vapor, energy ezpenditure is big and economic benefit is low；In the case, many companies carry out the trial of vacuum desorption techniques, and many set vacuum desorption systems of fabrication and installation.Existing vacuum desorption system includes the adsorbent bed of organic solvent, to the nitrogen purging device of adsorbent bed, the vacuum desorption device being desorbed to adsorbent bed, and to condensate recycling device that the organic solvent after desorption is reclaimed；It is that adsorbent bed and vacuum desorption device provide nitrogen environment that the effect of nitrogen purging device, which is, and carries out nitrogen purging to adsorbent bed in the vacuum desorption later stage, improves the organic solvent rate of recovery.Have a disadvantage in that：1st, vacuum desorption device uses single-stage vacuum pump, and vacuum pump flow rate is extremely difficult to desorption and required, desorption rate can not realize the balance with adsorption rate；2nd, when carrying out nitrogen purging to adsorbent bed in the vacuum desorption later stage, it is impossible to ensure that adsorbent bed keeps certain vacuum degree, the meaning of purging may be lost, or even be not normally functioning vacuum vacuum desorption system.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of vacuum desorption system and method for the organic solvent adsorption recovery that can increase substantially vacuum desorption flow and desorption rate, the balance of desorption rate and adsorption rate is realized.
In order to solve the above technical problems, the technical solution used in the present invention is：
The vacuum desorption system of organic solvent adsorption recovery, adsorbent bed including organic solvent, to the nitrogen purging device of adsorbent bed, the vacuum desorption device being desorbed to adsorbent bed, with the condensate recycling device reclaimed to the organic solvent after desorption, the vacuum desorption device is in series for multistage vacuum pump, and the flow of multistage vacuum pump successively decreases configuration in proportion.
It is further improved to：The vacuum desorption device is in series for three-level vavuum pump；The adsorbent bed connects first order Roots vaccum pump, and first order Roots vaccum pump connection second level Roots vaccum pump, second level Roots vaccum pump connection third level vavuum pump, third level vavuum pump connects the condensate recycling device；The flow of its three-level vavuum pump is configured to：（15~20）：（3~5）：1.
Nitrogen flow regulating valve is provided with the nitrogen purging device.
The second level Roots vaccum pump is air-cooled roots vacuum pump, and it is by being arranged on its condenser progress cooling certainly between third level vavuum pump.
The condensate recycling device is the solvent tank being connected with cooler or low-temperature solvent spray equipment.
The vacuum desorption method of organic solvent adsorption recovery, comprises the following steps：
When a, the adsorbent bed of adsorption saturation start desorption, start third level vavuum pump, adsorbent bed absolute pressure is dropped to certain numerical value；
B, startup first order Roots vaccum pump and second level Roots vaccum pump, increase rapidly flow velocity, a large amount of organic solvents are desorbed and are carried over adsorbent bed；
C, condensate recycling device carry out condensation recovery to organic solvent.
It is further improved to：In the desorption later stage, nitrogen flow regulating valve is adjusted, starts nitrogen purging device and is purged, and adsorbent bed is kept certain vacuum degree.
The method of the condensation is condenser condensation or low-temperature solvent spray condensation.
It is using the beneficial effect produced by above-mentioned technical proposal：
Successively decreased in proportion configuration by the flow of the series connection of multistage vacuum pump, and multistage vacuum pump, the flow and desorption rate of vacuum desorption system can be increased substantially, so as to realize the balance of desorption rate and adsorption rate.
Three-level vavuum pump is used in series, according to Roots vaccum pump the characteristics of pumping speed is big under the conditions of certain vacuum degree, the flow of three-level vavuum pump is set to successively decrease configuration by rational proportion by calculating, second level Roots vaccum pump is set to allow larger pressure difference, so as to improve flow velocity into tens times of ground in the case where energy consumption increase is few；Organic solvent is desorbed rapidly, and realize the balance between vacuum desorption system desorption rate, desorption performance and energy consumption, operating cost.
By setting nitrogen flow regulating valve on nitrogen purging device, can be when being desorbed the later stage to adsorbent bed progress nitrogen purging, ensure that adsorbent bed keeps certain vacuum degree, realize the purpose that the rate of recovery is improved by purging, and ensure the normal operation of whole vacuum desorption system.
Second level Roots vaccum pump is set to the configuration by the self cooled air-cooled roots vacuum pump of condenser, further optimization vacuum desorption system, reduction energy consumption and operating cost.
Different according to organic solvent are condensed from cooler or low-temperature solvent spray equipment.
Start third level vavuum pump first, adsorbent bed absolute pressure is dropped to certain numerical value, restart first order Roots vaccum pump and second level Roots vaccum pump, flow velocity can be increased rapidly, be desorbed a large amount of organic solvents and be carried over adsorbent bed.
In the desorption later stage, nitrogen flow regulating valve is first adjusted, restarts nitrogen purging device and is purged, it is ensured that adsorbent bed keeps certain vacuum degree, realize the purpose that the rate of recovery is improved by purging, and ensure the normal operation of whole vacuum desorption system.
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description.
Brief description of the drawings
Fig. 1 is the construction and workflow schematic diagram of the vacuum desorption system embodiment two of organic solvent adsorption recovery of the present invention.
Embodiment
Embodiment one,
The vacuum desorption system of organic solvent adsorption recovery, adsorbent bed including organic solvent, to the nitrogen purging device of adsorbent bed, the vacuum desorption device being desorbed to adsorbent bed, with the condensate recycling device reclaimed to the organic solvent after desorption, the vacuum desorption device is in series for two-stage vacuum pump, and the flow of two-stage vacuum pump successively decreases configuration in proportion.
Successively decreased in proportion by flow the secondary vacuum series connection of pumps of configuration, the flow and desorption rate of vacuum desorption system can be increased substantially, so as to realize the balance of desorption rate and adsorption rate.But this configuration mode will reach the requirement of desorption flow, it is necessary to which the vavuum pump of at least one-level has very big flow, and energy consumption is very high.
Embodiment two,
As shown in Figure 1, the vacuum desorption system of organic solvent adsorption recovery, adsorbent bed including organic solvent, to the nitrogen purging device of adsorbent bed, the vacuum desorption device being desorbed to adsorbent bed, with the condensate recycling device reclaimed to the organic solvent after desorption, the vacuum desorption device is in series for three-level vavuum pump；The adsorbent bed connects first order Roots vaccum pump, and first order Roots vaccum pump connection second level Roots vaccum pump, second level Roots vaccum pump connection third level vavuum pump, third level vavuum pump connects the condensate recycling device；The flow of its three-level vavuum pump is configured to：（15~20）：（3~5）：1.The second level Roots vaccum pump is air-cooled roots vacuum pump, and it is by being arranged on its condenser progress cooling certainly between third level vavuum pump.Nitrogen flow regulating valve is provided with the nitrogen purging device.The condensate recycling device is the solvent tank being connected with cooler or low-temperature solvent spray equipment.
The vacuum desorption method of organic solvent adsorption recovery, comprises the following steps：
When a, the adsorbent bed of adsorption saturation start desorption, start third level vavuum pump, adsorbent bed absolute pressure is dropped to certain numerical value；
B, startup first order Roots vaccum pump and second level Roots vaccum pump, increase rapidly flow velocity, a large amount of organic solvents are desorbed and are carried over adsorbent bed；
C, condensate recycling device carry out condensation recovery to organic solvent.The method of the condensation is condenser condensation or low-temperature solvent spray condensation；
D, not solidifying solvent gas lead back adsorbent bed and adsorbed again；
E, in the desorption later stage, adjust nitrogen flow regulating valve, start nitrogen purging device and purged, and make the certain vacuum degree of adsorbent bed holding.
Three-level vavuum pump is used in series, according to Roots vaccum pump the characteristics of pumping speed is big under the conditions of certain vacuum degree, the flow of three-level vavuum pump is set to successively decrease configuration by rational proportion by calculating, second level Roots vaccum pump is set to allow larger pressure difference, so as to improve flow velocity into tens times of ground in the case where energy consumption increase is few；Organic solvent is desorbed rapidly, and realize the balance between vacuum desorption system desorption rate, desorption performance and energy consumption, operating cost.Second level Roots vaccum pump is set to the configuration by the self cooled air-cooled roots vacuum pump of condenser, further optimization vacuum desorption system, reduction energy consumption and operating cost.By setting nitrogen flow regulating valve on nitrogen purging device, can be when being desorbed the later stage to adsorbent bed progress nitrogen purging, ensure that adsorbent bed keeps certain vacuum degree, realize the purpose that the rate of recovery is improved by purging, and ensure the normal operation of whole vacuum desorption system.Different according to organic solvent are condensed from cooler or low-temperature solvent spray equipment.
Start third level vavuum pump first, adsorbent bed absolute pressure is dropped to certain numerical value, restart first order Roots vaccum pump and second level Roots vaccum pump, flow velocity can be increased rapidly, be desorbed a large amount of organic solvents and be carried over adsorbent bed.In the desorption later stage, nitrogen flow regulating valve is first adjusted, restarts nitrogen purging device and is purged, it is ensured that adsorbent bed keeps certain vacuum degree, realize the purpose that the rate of recovery is improved by purging, and ensure the normal operation of whole vacuum desorption system.
Embodiment three,
The vacuum desorption system of organic solvent adsorption recovery, adsorbent bed including organic solvent, to the nitrogen purging device of adsorbent bed, the vacuum desorption device being desorbed to adsorbent bed, with the condensate recycling device reclaimed to the organic solvent after desorption, the vacuum desorption device is the vacuum pump group that is in series of level Four vavuum pump, and the flow of level Four vavuum pump successively decreases configuration in proportion.
Higher vacuum desorption flow system flow and desorption rate can be realized by the series connection of pumps of level Four vacuum.
Claims (7)
1. the vacuum desorption system of organic solvent adsorption recovery, adsorbent bed including organic solvent, to the nitrogen purging device of adsorbent bed, the vacuum desorption device being desorbed to adsorbent bed, with the condensate recycling device reclaimed to the organic solvent after desorption, it is characterised in that：The vacuum desorption device is in series for multistage vacuum pump, and the flow of multistage vacuum pump successively decreases configuration in proportion；The vacuum desorption device is in series for three-level vavuum pump；The adsorbent bed connects first order Roots vaccum pump, and first order Roots vaccum pump connection second level Roots vaccum pump, second level Roots vaccum pump connection third level vavuum pump, third level vavuum pump connects the condensate recycling device；The flow of its three-level vavuum pump is configured to：（15~20）：（3~5）：1.
2. the vacuum desorption system of organic solvent adsorption recovery according to claim 1, it is characterised in that：Nitrogen flow regulating valve is provided with the nitrogen purging device.
3. the vacuum desorption system of organic solvent adsorption recovery according to claim 1, it is characterised in that：The second level Roots vaccum pump is air-cooled roots vacuum pump, and it is by being arranged on its condenser progress cooling certainly between third level vavuum pump.
4. the vacuum desorption system of organic solvent adsorption recovery according to claim 1, it is characterised in that：The condensate recycling device is the solvent tank being connected with cooler or low-temperature solvent spray equipment.
5. the vacuum desorption method of the organic solvent adsorption recovery of the vacuum desorption system of organic solvent adsorption recovery according to claim 1, it is characterised in that：Comprise the following steps,
When a, the adsorbent bed of adsorption saturation start desorption, start third level vavuum pump, adsorbent bed absolute pressure is dropped to certain numerical value；
B, startup first order Roots vaccum pump and second level Roots vaccum pump, increase rapidly flow velocity, a large amount of organic solvents are desorbed and are carried over adsorbent bed；
C, condensate recycling device carry out condensation recovery to organic solvent.
6. the vacuum desorption method of organic solvent adsorption recovery according to claim 5, it is characterised in that：In the desorption later stage, nitrogen flow regulating valve is provided with described nitrogen purging device, nitrogen flow regulating valve is adjusted, starts nitrogen purging device and is purged, and adsorbent bed is kept certain vacuum degree.
7. the vacuum desorption method of organic solvent adsorption recovery according to claim 5, it is characterised in that：The method of the condensation is condenser condensation or low-temperature solvent spray condensation.
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| CN104128364A (en) * | 2014-06-25 | 2014-11-05 | 浙江大学 | Novel petroleum desorption agent reinforced by sodium carbonate |
| CN106807179B (en) * | 2017-01-26 | 2023-04-11 | 上海聚宸新能源科技有限公司 | Adsorption condensation oil gas recovery device and oil gas recovery process utilizing self-adsorption heat regeneration |
| CN113413727B (en) * | 2021-06-28 | 2022-10-14 | 中国海洋石油集团有限公司 | Oil gas recovery adsorption and desorption device and use method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1216719A (en) * | 1997-11-04 | 1999-05-19 | 普拉塞尔技术有限公司 | Vacuum pressure swing adsorption system and method |
| CN103228338A (en) * | 2010-10-16 | 2013-07-31 | 林德股份公司 | Method and device for vacuum pressure swing adsorption temporary storage |
| CN203663659U (en) * | 2013-12-19 | 2014-06-25 | 赵胜 | Vacuum desorption system for adsorption recovery of organic solvent |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1216719A (en) * | 1997-11-04 | 1999-05-19 | 普拉塞尔技术有限公司 | Vacuum pressure swing adsorption system and method |
| CN103228338A (en) * | 2010-10-16 | 2013-07-31 | 林德股份公司 | Method and device for vacuum pressure swing adsorption temporary storage |
| CN203663659U (en) * | 2013-12-19 | 2014-06-25 | 赵胜 | Vacuum desorption system for adsorption recovery of organic solvent |
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Granted publication date: 20160629 Termination date: 20161219 |