CN103830991A - Vacuum desorption system and method for adsorption and recovery of organic solvent - Google Patents
Vacuum desorption system and method for adsorption and recovery of organic solvent Download PDFInfo
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- CN103830991A CN103830991A CN201310697071.7A CN201310697071A CN103830991A CN 103830991 A CN103830991 A CN 103830991A CN 201310697071 A CN201310697071 A CN 201310697071A CN 103830991 A CN103830991 A CN 103830991A
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Abstract
The invention discloses a vacuum desorption system and method for adsorption and recovery of an organic solvent, and relates to an organic solvent adsorption and recovery system applied in industries such as medicines, petrochemical engineering and novel materials. The vacuum desorption system comprises an adsorption bed of the organic solvent, a nitrogen purging apparatus for the adsorption bed, a vacuum desorption apparatus for desorbing the adsorption bed, and a condensation and recovery apparatus for recovering the desorbed organic solvent. The vacuum desorption system is formed by connecting multi-stage vacuum pumps in series. The multi-stage vacuum pumps are arranged in an order of descending proportions of flow rate. By connecting the multi-stage vacuum pumps arranged in the order of descending proportions of the flow rate in series, the flow rate and the desorption speed of the vacuum desorption system can be greatly increased, thereby realizing the balance between the desorption speed and the adsorption speed.
Description
Technical field
The present invention relates to desorption system and method that a kind of organic solvent absorption is reclaimed, the vacuum desorption system and method that especially a kind of organic solvent absorption is reclaimed.
Background technology
In the organic solvent adsorption recovery system of the sector applications such as medicine, petrochemical industry, new material, use in a large number low pressure water vapor to carry out desorption, energy consumption is large and economic benefit is low; In the case, a lot of companies carry out the trial of vacuum desorption technique, and fabrication and installation a lot of cover vacuum desorption systems.Existing vacuum desorption system comprises the adsorbent bed of organic solvent, to the nitrogen purging device of adsorbent bed, adsorbent bed is carried out to the vacuum desorption device of desorption, and the condensate recycling device that the organic solvent after desorption is reclaimed; The effect of nitrogen purging device is to provide nitrogen environment for adsorbent bed and vacuum desorption device, and in the vacuum desorption later stage, adsorbent bed is carried out to nitrogen blowing, improves the organic solvent rate of recovery.Its defect is: 1, vacuum desorption device adopts single-stage vavuum pump, and vacuum pump flow rate is difficult to reach desorption requirement, and desorption rate can not be realized the balance with adsorption rate; 2, while adsorbent bed being carried out to nitrogen blowing in the vacuum desorption later stage, cannot ensure that adsorbent bed keeps certain vacuum value, may lose the meaning of purging, even make vacuum vacuum desorption system normally not move.
Summary of the invention
The technical problem to be solved in the present invention is to provide the vacuum desorption system and method that a kind of organic solvent absorption that can increase substantially vacuum desorption flow and desorption rate is reclaimed, and realizes the balance of desorption rate and adsorption rate.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
The vacuum desorption system that organic solvent absorption is reclaimed, comprise the adsorbent bed of organic solvent, to the nitrogen purging device of adsorbent bed, adsorbent bed is carried out to the vacuum desorption device of desorption, with the condensate recycling device that the organic solvent after desorption is reclaimed, described vacuum desorption device is that multistage vacuum pump is in series, the configuration of successively decreasing in proportion of the flow of multistage vacuum pump.
It is further improved to: described vacuum desorption device is that three grades of vavuum pumps are in series; Described adsorbent bed connects first order Roots vaccum pump, and first order Roots vaccum pump connects second level Roots vaccum pump, and second level Roots vaccum pump connects third level vavuum pump, and third level vavuum pump connects described condensate recycling device; The flow of its three grades of vavuum pumps is configured to: (15～20): (3～5): 1.
On described nitrogen purging device, be provided with nitrogen flow control valve.
Described second level Roots vaccum pump is air-cooled roots vacuum pump, and it is undertaken from cooling by the condenser being arranged between itself and third level vavuum pump.
Described condensate recycling device is the solvent tank being connected with cooler or low-temperature solvent spray equipment.
The vacuum desorption method that organic solvent absorption is reclaimed, comprises the following steps:
A, when adsorbing saturated adsorbent bed and starting desorption, start third level vavuum pump, make adsorbent bed absolute pressure drop to certain numerical value;
B, startup first order Roots vaccum pump and second level Roots vaccum pump, increase rapidly flow velocity, and a large amount of organic solvent desorptions are also taken out of adsorbent bed;
C, condensate recycling device carry out condensation recovery to organic solvent.
It is further improved to: in the desorption later stage, adjust nitrogen flow control valve, start nitrogen purging device and purge, and make adsorbent bed keep certain vacuum value.
The method of described condensation is condenser condenses or the condensation of low-temperature solvent spray.
The beneficial effect that adopts technique scheme to produce is:
By the series connection of multistage vacuum pump, and the configuration of successively decreasing in proportion of the flow of multistage vacuum pump, can increase substantially flow and the desorption rate of vacuum desorption system, thereby realize the balance of desorption rate and adsorption rate.
Three grades of vavuum pump series connection are used, according to Roots vaccum pump large feature of pumping speed under certain vacuum degree condition, the flow that makes three grades of vavuum pumps by calculating is by the rational proportion configuration of successively decreasing, make second level Roots vaccum pump can allow larger pressure reduction, thereby increase few in the situation that and become tens times of ground to improve flow velocitys in energy consumption; Not only make the rapid desorption of organic solvent, and realized the balance between vacuum desorption system desorption rate, desorption performance and energy consumption, operating cost.
By nitrogen flow control valve is set on nitrogen purging device, can carry out nitrogen blowing to adsorbent bed in the desorption later stage time, ensure that adsorbent bed keeps certain vacuum value, realize and improve the object of the rate of recovery by purging, and guarantee the normal operation of whole vacuum desorption system.
Second level Roots vaccum pump is set to, by the self cooled air-cooled roots vacuum pump of condenser, further optimize the configuration of vacuum desorption system, reduces energy consumption and operating cost.
Select cooler or low-temperature solvent spray equipment to carry out condensation according to the difference of organic solvent.
First start third level vavuum pump, make adsorbent bed absolute pressure drop to certain numerical value, restart first order Roots vaccum pump and second level Roots vaccum pump, can increase rapidly flow velocity, make a large amount of organic solvent desorptions and taken out of adsorbent bed.
In the desorption later stage, first adjust nitrogen flow control valve, restart nitrogen purging device and purge, can ensure that adsorbent bed keeps certain vacuum value, realize and improve the object of the rate of recovery by purging, and guarantee the normal operation of whole vacuum desorption system.
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Brief description of the drawings
Fig. 1 is structure and the workflow schematic diagram of the vacuum desorption system embodiment two of organic solvent absorption recovery of the present invention.
Detailed description of the invention
Embodiment mono-,
The vacuum desorption system that organic solvent absorption is reclaimed, comprise the adsorbent bed of organic solvent, to the nitrogen purging device of adsorbent bed, adsorbent bed is carried out to the vacuum desorption device of desorption, with the condensate recycling device that the organic solvent after desorption is reclaimed, described vacuum desorption device is that two-stage vacuum pump is in series, the configuration of successively decreasing in proportion of the flow of two-stage vacuum pump.
By successively decrease the in proportion two-stage vacuum pump series connection of configuration of flow, can increase substantially flow and the desorption rate of vacuum desorption system, thereby realize the balance of desorption rate and adsorption rate.But this configuration mode will reach the requirement of desorption flow, need to have at least the vavuum pump of one-level to have very large flow, energy consumption is very high.
Embodiment bis-,
As shown in Figure 1, the vacuum desorption system that organic solvent absorption is reclaimed, comprise the adsorbent bed of organic solvent, to the nitrogen purging device of adsorbent bed, adsorbent bed is carried out to the vacuum desorption device of desorption, with the condensate recycling device that the organic solvent after desorption is reclaimed, described vacuum desorption device is that three grades of vavuum pumps are in series; Described adsorbent bed connects first order Roots vaccum pump, and first order Roots vaccum pump connects second level Roots vaccum pump, and second level Roots vaccum pump connects third level vavuum pump, and third level vavuum pump connects described condensate recycling device; The flow of its three grades of vavuum pumps is configured to: (15～20): (3～5): 1.Described second level Roots vaccum pump is air-cooled roots vacuum pump, and it is undertaken from cooling by the condenser being arranged between itself and third level vavuum pump.On described nitrogen purging device, be provided with nitrogen flow control valve.Described condensate recycling device is the solvent tank being connected with cooler or low-temperature solvent spray equipment.
The vacuum desorption method that organic solvent absorption is reclaimed, comprises the following steps:
A, when adsorbing saturated adsorbent bed and starting desorption, start third level vavuum pump, make adsorbent bed absolute pressure drop to certain numerical value;
B, startup first order Roots vaccum pump and second level Roots vaccum pump, increase rapidly flow velocity, and a large amount of organic solvent desorptions are also taken out of adsorbent bed;
C, condensate recycling device carry out condensation recovery to organic solvent.The method of described condensation is condenser condenses or the condensation of low-temperature solvent spray;
D, not solidifying solvent gas draw back adsorbent bed and again adsorb;
E, in the desorption later stage, adjust nitrogen flow control valve, start nitrogen purging device and purge, and make adsorbent bed keep certain vacuum value.
Three grades of vavuum pump series connection are used, according to Roots vaccum pump large feature of pumping speed under certain vacuum degree condition, the flow that makes three grades of vavuum pumps by calculating is by the rational proportion configuration of successively decreasing, make second level Roots vaccum pump can allow larger pressure reduction, thereby increase few in the situation that and become tens times of ground to improve flow velocitys in energy consumption; Not only make the rapid desorption of organic solvent, and realized the balance between vacuum desorption system desorption rate, desorption performance and energy consumption, operating cost.Second level Roots vaccum pump is set to, by the self cooled air-cooled roots vacuum pump of condenser, further optimize the configuration of vacuum desorption system, reduces energy consumption and operating cost.By nitrogen flow control valve is set on nitrogen purging device, can carry out nitrogen blowing to adsorbent bed in the desorption later stage time, ensure that adsorbent bed keeps certain vacuum value, realize and improve the object of the rate of recovery by purging, and guarantee the normal operation of whole vacuum desorption system.Select cooler or low-temperature solvent spray equipment to carry out condensation according to the difference of organic solvent.
First start third level vavuum pump, make adsorbent bed absolute pressure drop to certain numerical value, restart first order Roots vaccum pump and second level Roots vaccum pump, can increase rapidly flow velocity, make a large amount of organic solvent desorptions and taken out of adsorbent bed.In the desorption later stage, first adjust nitrogen flow control valve, restart nitrogen purging device and purge, can ensure that adsorbent bed keeps certain vacuum value, realize and improve the object of the rate of recovery by purging, and guarantee the normal operation of whole vacuum desorption system.
Embodiment tri-,
The vacuum desorption system that organic solvent absorption is reclaimed, comprise the adsorbent bed of organic solvent, to the nitrogen purging device of adsorbent bed, adsorbent bed is carried out to the vacuum desorption device of desorption, with the condensate recycling device that the organic solvent after desorption is reclaimed, described vacuum desorption device is the vavuum pump group that level Four vavuum pump is in series, the configuration of successively decreasing in proportion of the flow of level Four vavuum pump.
Can realize higher vacuum desorption flow system flow and desorption rate by the series connection of level Four vavuum pump.
Claims (8)
1. the vacuum desorption system that organic solvent absorption is reclaimed, comprise the adsorbent bed of organic solvent, to the nitrogen purging device of adsorbent bed, adsorbent bed is carried out to the vacuum desorption device of desorption, with the condensate recycling device that the organic solvent after desorption is reclaimed, it is characterized in that: described vacuum desorption device is that multistage vacuum pump is in series the configuration of successively decreasing in proportion of the flow of multistage vacuum pump.
2. the vacuum desorption system that organic solvent absorption according to claim 1 is reclaimed, is characterized in that: described vacuum desorption device is that three grades of vavuum pumps are in series; Described adsorbent bed connects first order Roots vaccum pump, and first order Roots vaccum pump connects second level Roots vaccum pump, and second level Roots vaccum pump connects third level vavuum pump, and third level vavuum pump connects described condensate recycling device; The flow of its three grades of vavuum pumps is configured to: (15～20): (3～5): 1.
3. the vacuum desorption system that organic solvent absorption according to claim 1 is reclaimed, is characterized in that: on described nitrogen purging device, be provided with nitrogen flow control valve.
4. the vacuum desorption system that organic solvent according to claim 2 absorption is reclaimed, is characterized in that: described second level Roots vaccum pump is air-cooled roots vacuum pump, and it is undertaken from cooling by the condenser being arranged between itself and third level vavuum pump.
5. the vacuum desorption system that organic solvent absorption according to claim 1 is reclaimed, is characterized in that: described condensate recycling device is the solvent tank being connected with cooler or low-temperature solvent spray equipment.
6. the vacuum desorption method that the organic solvent absorption of the vacuum desorption system that organic solvent absorption according to claim 2 is reclaimed is reclaimed, is characterized in that: comprises the following steps,
A, when adsorbing saturated adsorbent bed and starting desorption, start third level vavuum pump, make adsorbent bed absolute pressure drop to certain numerical value;
B, startup first order Roots vaccum pump and second level Roots vaccum pump, increase rapidly flow velocity, and a large amount of organic solvent desorptions are also taken out of adsorbent bed;
C, condensate recycling device carry out condensation recovery to organic solvent.
7. the vacuum desorption method that organic solvent absorption according to claim 6 is reclaimed, it is characterized in that: in the desorption later stage, adjust nitrogen flow control valve claimed in claim 3, start nitrogen purging device and purge, and make adsorbent bed keep certain vacuum value.
8. the vacuum desorption method that organic solvent absorption according to claim 6 is reclaimed, is characterized in that: the method for described condensation is condenser condenses or the condensation of low-temperature solvent spray.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104128364A (en) * | 2014-06-25 | 2014-11-05 | 浙江大学 | Novel petroleum desorption agent reinforced by sodium carbonate |
| CN106807179A (en) * | 2017-01-26 | 2017-06-09 | 上海聚宸新能源科技有限公司 | A kind of adsorption condensing device for recovering oil and gas and petroleum vapor recovery technique using from absorption hot recycling |
| CN113413727A (en) * | 2021-06-28 | 2021-09-21 | 中国海洋石油集团有限公司 | Oil gas recovery adsorption and desorption device and use method thereof |
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| US20120118147A1 (en) * | 2010-11-12 | 2012-05-17 | The Texas A&M University System | Systems and methods for air dehumidification and cooling with membrane water vapor rejection |
| 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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Patent Citations (4)
| 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 |
| US20120118147A1 (en) * | 2010-11-12 | 2012-05-17 | The Texas A&M University System | Systems and methods for air dehumidification and cooling with membrane water vapor rejection |
| CN203663659U (en) * | 2013-12-19 | 2014-06-25 | 赵胜 | Vacuum desorption system for adsorption recovery of organic solvent |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104128364A (en) * | 2014-06-25 | 2014-11-05 | 浙江大学 | Novel petroleum desorption agent reinforced by sodium carbonate |
| CN106807179A (en) * | 2017-01-26 | 2017-06-09 | 上海聚宸新能源科技有限公司 | A kind of adsorption condensing device for recovering oil and gas and petroleum vapor recovery technique using from absorption hot recycling |
| 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 |
| CN113413727A (en) * | 2021-06-28 | 2021-09-21 | 中国海洋石油集团有限公司 | Oil gas recovery adsorption and desorption device and use method thereof |
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