CN201353437Y - Liquid nitrogen solvent recycling device - Google Patents
Liquid nitrogen solvent recycling device Download PDFInfo
- Publication number
- CN201353437Y CN201353437Y CNU2008201366640U CN200820136664U CN201353437Y CN 201353437 Y CN201353437 Y CN 201353437Y CN U2008201366640 U CNU2008201366640 U CN U2008201366640U CN 200820136664 U CN200820136664 U CN 200820136664U CN 201353437 Y CN201353437 Y CN 201353437Y
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- heat exchanger
- liquid nitrogen
- pipe
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Abstract
The utility model relates to a solvent recycling device, which comprises at least one heat exchanger, at least one low-temperature pipeline, at least one high-temperature pipeline, at least one solvent pipeline and at least one exhaust pipeline, wherein the heat exchanger is used for exchanging the heat between high temperature gas and low temperature gas and is provided with at least one filter; one end of the low-temperature pipeline is communicated with the heat exchanger, and the other end is communicated with a liquid nitrogen storage groove; one end of the high-temperature pipeline is communicated with the heat exchanger, and the other end is communicated with a solvent gas source; one end of the solvent pipeline is communicated with the bottom part of the heat exchanger, and the other end is communicated with a solvent stewing groove; one end of the exhaust pipeline is communicated with the top part of the heat exchanger, and the other end is communicated with open air. The liquid nitrogen is adopted as the cold source, so that the gas containing the solvent which is exhausted by the exhausting system is condensed or frozen inside the heat exchanger so as to realize the recycling effect of high purity and to satisfy the higher environmental-protection exhaustion standard at the same time.
Description
Technical field
The utility model relates to a kind of solvent recovery unit, and particularly a kind of liquid nitrogen that utilizes carries out heat exchange to the gas that contains solvent, and then uses reclaiming once again after the container condensation in the gas.
Background technology
In the process of chemical industry, pharmaceuticals industry, petrochemical industry, cloth coating and adhesive tape industry, often need to add various organic solvents (for example: toluene, acetone, isopropyl alcohol, ethylene glycol, methyl alcohol, butanone etc..), and this kind solvent can the heating or drying course in the volatilization and discharge with exhaust, if without dealing carefully with, this contains the gas of solvent if be discharged in the atmosphere, possible pollutant atmosphere, therefore and a large amount of solvents directly is emitted on atmosphere, also do not meet economic benefit.
Traditional solution recovery method, wherein one be to utilize activated carbon to absorb and the fixed bed or the pulldown bed formula recovery system of desorption, but the recovery method of this class all has some shortcomings, its activated carbon has service life (3-5), and must periodic replacement, cost is higher relatively, and activated carbon has its saturation limit to the absorptivity of solvent, take a broad view of, the solvent discharge standard that reach higher recovery and low concentration (ppm) is comparatively difficult; Moreover, from the process of activated carbon desorption solvent, need to use the thermal source of high temperature usually, for example: steam, deep fat or other hot medias, carrying out cost higher will be unavoidable problem.A nearlyer step ground, through the solvent of high temperature desorption and the mist of steam, must rely on other cooling way (for example: cooling water or chilled water) that described Mixed Gas Condensation is become liquid again, and because it contains relatively large moisture, the process need long period of described separated from solvent, and the solvent purity that recovery obtains can't arrive too high.Therefore, compared to traditional method for recovering solvents, the utility model has the advantages that liquid nitrogen (186 ℃) that utilizes low temperature and the gas that contains solvent carry out heat exchange, the liquid nitrogen of low temperature can absorb a large amount of latent heat in a short period of time and flash to nitrogen, and solvent also can condense into the liquid or solid-state feasible solvent very low (approximately 5-10ppm) that is disposed in the atmosphere at short notice rapidly simultaneously, and can reach legal discharge standard easily, and the nitrogen that evaporates also can utilize as other purposes in the factory, and owing to need not use active carbon, other elements such as steam and cooling water, and though in the early stage on the cost of investment or on the industrial operating cost all more traditional method for recovering solvents cheap.
Summary of the invention
The purpose of this utility model and effect are to be to provide a liquid nitrogen solvent recovery unit, it provides a heat exchanger (with reference to shown in Figure 1), utilize liquid nitrogen as low-temperature receiver, to contain solvent gas condensation or freezing in described heat exchanger in the exhaust system exhaust, and reach the recovering effect of higher degree, also can satisfy higher environmental emission standard simultaneously.
Another order that the utility model is and effect are to be to provide a liquid nitrogen solvent recovery unit, and it provides lower initial investment cost and operating cost.
For the major technique means that achieve the above object comprise a kind of liquid nitrogen solvent recovery unit, described solvent recovery unit comprises:
At least one heat exchanger that supplies high-temperature gas and cryogenic gas to carry out heat exchange is provided with at least one filter in the described heat exchanger;
At least one cryogenic pipe, an end of described cryogenic pipe is communicated with described heat exchanger, and the other end is communicated with a liquid nitrogen accumulator tank;
At least one high temperature conduit, an end of described high temperature conduit is communicated with described heat exchanger, and the other end is communicated with a solvent gas source;
At least one solvent pipe, described solvent pipe one end is communicated with described heat exchanger bottom, and the other end leaves standstill groove with a solvent and is communicated with; And
At least one gas exhaust piping, described gas exhaust piping one end is communicated with described heat exchanger top, and the other end is communicated with open air.
Based on above-mentioned technological means, the utility model more comprises a safety valve, and described safety valve can avoid contingency because of the excessive situation of any reason build-up of pressure, and produces the danger that blast is arranged.
Compared with prior art, adopt the advantage that the utlity model has of technique scheme to be: to utilize liquid nitrogen as low-temperature receiver, to contain solvent gas condensation or freezing in described heat exchanger in the exhaust system exhaust, and reach the recovering effect of higher degree, also can satisfy higher environmental emission standard simultaneously.
Description of drawings
Fig. 1 is the utility model schematic flow sheet;
Fig. 2 is the utility model device schematic diagram ();
Fig. 3 is the utility model device schematic diagram (two).
The specific embodiment
For ease of explanation the utility model represented central idea in foregoing invention content one hurdle, express with specific embodiment now.Various different objects are to describe in fitting at ratio, size, deflection or the displacement of explanation among the embodiment, but not are drawn in the ratio of actual components, close chat earlier bright.And in the following description, similar elements is to represent with identical numbering.
With reference to shown in Figure 2, a kind of liquid nitrogen solvent recovery unit, described solvent recovery unit comprises at least two heat exchangers 10, be provided with at least one filter 101 in the described heat exchanger 10, described heat exchanger 10 more comprises at least one heater 105, described heater 105 is arranged on the bottom of described heat exchanger 10, described heat exchanger 10 more comprises a condenser pipe 102, the inlet of described condenser pipe 102 is provided with a cryogenic pipe 11 with 111 of liquid nitrogen accumulator tanks and is communicated with, and the outlet of a condenser pipe 102 is communicated with by described cryogenic pipe with the inlet of another condenser pipe 102 in the condenser pipe 102 of described two heat-exchanger 10; Described heat exchanger 10 more comprises a housing 103, the inlet of described housing 103 is provided with a high temperature conduit 12 with 121 in a solvent gas source and is communicated with, the outlet of a housing 103 is communicated with by described high temperature conduit 12 with the inlet of another housing 103 in the housing of described two heat-exchanger 10, is different to have a gas exhaust piping 14 between the outlet that is communicated with described housing 103 and the described external world and be communicated with; Described high temperature conduit 12 is provided with at least one vented drum blower fan 122 that solvent gas enters described heat exchanger 10 that extracts between described solvent gas source 121 and the described heat exchanger 10, the inlet of described vented drum blower fan 122 is communicated with described solvent gas source 121, and its outlet is communicated with described heat exchanger 10; Described high temperature conduit 12 is provided with at least one the cooling and the cooling unit 123 of filter solvents gas between described vented drum blower fan 122 and the described solvent gas source 121, the inlet of described cooling unit 123 is communicated with described solvent gas source 121, its outlet is communicated with described vented drum blower fan 122, have a cooler 124 and a filter 125 in the described cooling unit 123, described filter 125 is arranged on the porch of described cooling unit 123, being different from cryogenic pipe 11 1 ends that are communicated with described condenser pipe 102 is communicated with the outlet of described condenser pipe 102, the other end is communicated with the inlet of the cooler 124 of described cooling unit 123, have described cryogenic pipe 11 between the outlet of described cooler 124 and the external world and be communicated with, have more a safety valve 126 between described cooling unit 123 and the described solvent gas source 121 and be in communication with the outside; At least one solvent pipe 13, described solvent pipe 13 1 ends are communicated with described heat exchanger 10 bottoms, the other end leaves standstill groove 131 with a solvent and is communicated with, described solvent leaves standstill groove 131 and comprises that more one can collect the solvent storage groove 132 that utilizes density and Gravity Separation upper strata solvent, described solvent leaves standstill to have described solvent pipe 13 between groove 131 and the described solvent storage groove 132 and is communicated with, and have one in described solvent pipe 13 and solvent can be left standstill groove 131 upper strata solvents and pump solvent pump 133, and the described solvent top of leaving standstill groove 131 has described high temperature conduit 12 with described vented drum blower fan 122 and is communicated with to described solvent storage groove 132.
Based on above-mentioned technological means, liquid nitrogen is delivered to the condenser pipe 102 of described heat exchanger 10 via described cryogenic pipe 11, simultaneously, described solvent gas utilizes described vented drum blower fan 122 to enter described cooling unit 123 by 121 suctions of described solvent gas source, utilizing the filter 125 of described cooling unit 123 to carry out filtering the first time stops impurity between air, enter in the housing 103 of described first heat exchanger 10 by described vented drum blower fan 122 again, liquid nitrogen in the described condenser pipe 102 will be drawn a large amount of heats by the solvent gas in the described housing 103 at this moment, make steam and solvent vapour in the described solvent gas condense into liquid or even solid-state at short notice rapidly, and solvent gas that is not partly condensed as yet and steam are delivered to described second heat exchanger after by described filter 101 molecule being stopped again, the temperature of the condenser pipe 102 in this heat exchanger is lower, can further handle the solvent gas that is not condensed as yet, therefore, the gas that originally contains solvent promptly is processed into clean gas, after by described filter 101 small particle being filtered again, gas exhaust piping 14 by described heat exchanger 10 tops is disposed in the atmosphere, described heat exchanger 10 bottoms have more described heater 105 to melt the solvent that is frozen into solid, and moisture that condenses and solvent leave standstill groove 131 via the described solvent of solvent pipe 13 inflows of described heat exchanger 10 bottoms again, leaving standstill in the groove 131 at described solvent utilizes the relation of gravity and density that solvent and moisture are become two-phase, utilize described solvent pump 133 that the solvent on upper strata is extracted the effect that reaches solvent recovery to described solvent storage groove 132 storages again, and described solvent leaves standstill the solvent gas that produced in the groove 131 and can be extracted by described vented drum blower fan 122 again and enter the effect of reaching backflow in the described heat exchanger, improves solvent recovering yield; When liquid nitrogen carries out heat exchange in described heat exchanger 10 after, just can enter the cooler 124 of described cooling unit 123 again, although described liquid nitrogen has absorbed a large amount of heats, but the thermal content of the solvent gas that its thermal content still directly gives off far below factory, so in described cooling unit 123, nitrogen and described solvent gas carry out a heat exchange again, the low temperature nitrogen of this moment effect of only solvent gas being cooled off, finish cooling effect after nitrogen just directly be disposed among the atmosphere; For safety is considered, just in case when described solvent recovery unit because the excessive situation of any reason build-up of pressure, and produce when the doubt of explosion danger is arranged, just described safety valve 126 can open too much pressure is discharged, to avoid the doubt on the safety.
With reference to shown in Figure 3, a kind of liquid nitrogen solvent recovery unit, described solvent recovery unit comprises at least one heat exchanger 10 that supplies high-temperature gas and cryogenic gas to carry out heat exchange, be provided with at least one filter 101 in the described heat exchanger 10, described heat exchanger 10 more comprises at least one heater 105, described heater 105 is arranged on the bottom of described heat exchanger 10, described heat exchanger 10 more comprises an air pipe line 15 that is arranged on described heat exchanger 10 tops and is communicated with described heat exchanger, and the open height that goes out of described heat exchanger is arranged between described filter 101 and the described air pipe line 15; At least one cryogenic pipe 11, an end of described cryogenic pipe 11 is communicated with described heat exchanger 10, and the other end is communicated with a liquid nitrogen accumulator tank 111; At least one high temperature conduit 12, one end of described high temperature conduit 12 is communicated with described heat exchanger 10, the other end is communicated with a solvent gas source 121, described high temperature conduit 12 is provided with at least one vented drum blower fan 122 that solvent gas enters described heat exchanger 10 that extracts between described solvent gas source 121 and the described heat exchanger 10, the inlet of described vented drum blower fan 122 is communicated with described solvent gas source 121, its outlet is communicated with described heat exchanger 10, described high temperature conduit 12 is provided with at least one the cooling and the cooling unit 123 of filter solvents gas between described vented drum blower fan 122 and the described solvent gas source 121, the inlet of described cooling unit 123 is communicated with described solvent gas source 121, its outlet is communicated with described vented drum blower fan 122, have a cooler 124 and a filter 125 in the described cooling unit 123, described filter 125 is arranged on the porch of described cooling unit 123, having described cryogenic pipe 11 between the outlet of the inlet of described cooler 124 and described heat exchanger 10 is communicated with, have described gas exhaust piping 14 between the outlet of described cooler 124 and the external world and be communicated with, have more a safety valve 126 between described cooling unit 123 and the described solvent gas source 121 and be in communication with the outside; Described cryogenic pipe 11 and described high temperature conduit 12 are provided with one respectively with described heat exchanger 10 places of connection can and contain the atomization unit 104 that solvent gas ejects atomizing with liquid nitrogen; At least one solvent pipe 13, described solvent pipe 13 1 ends are communicated with described heat exchanger 10 bottoms, the other end leaves standstill groove 131 with a solvent and is communicated with, described solvent leaves standstill groove 131 and comprises that more one can collect the solvent storage groove 132 of the upper strata solvent that utilizes density and Gravity Separation, described solvent leaves standstill to have described solvent pipe 13 between groove 131 and the described solvent storage groove 132 and is communicated with, and have one in described solvent pipe 13 and solvent can be left standstill groove 131 upper strata solvents and pump solvent pump 133 to described solvent storage groove 132, the top that described solvent leaves standstill groove 131 has described high temperature conduit 12 with described vented drum blower fan 122 and is communicated with.
Based on above-mentioned technological means, liquid nitrogen is delivered to the atomization unit 104 of described heat exchanger 10 via described cryogenic pipe 11, and be sprayed directly among the described heat exchanger 10, simultaneously, described solvent gas utilizes described vented drum blower fan 122 to enter described cooling unit 123 by 121 suctions of described solvent gas source, utilizing the filter 125 of described cooling unit 123 to carry out filtering the first time stops impurity between air, enter in described first heat exchanger 10 by described vented drum blower fan 122 again, and be sprayed directly among the described heat exchanger 10 by described atomization unit 104, this moment, liquid nitrogen and solvent gas were very tiny molecule, so it is maximum that the unit contact area reaches, can in the very short time, carry out exchange heat, described liquid nitrogen can be drawn a large amount of heats from solvent gas, make steam and solvent vapour in the described solvent gas condense into liquid or even solid-state at short notice rapidly, and after the solvent gas that is not partly condensed as yet and trying to make a good showing stops molecule by described filter 101, the gas that feasible script contains solvent promptly is processed into the clean gas and the gaseous mixture of nitrogen, arrive the upper strata of described filter 101, can start in case of necessity compressed air via described air pipe line 15 downwards to filter 101 internal sweep, make and blown off to the bottom of heat exchanger 10 attached to the solid-state component on described filter 101 outer surfaces, described clean gas and nitrogen mixture can enter the cooler 124 of described cooling unit 123 again, although described liquid nitrogen has absorbed a large amount of heats, but the thermal content of the solvent gas that its thermal content still directly gives off far below factory, so in described cooling unit 123, gaseous mixture and described solvent gas carry out a heat exchange again, but the effect that the low temperature nitrogen of this moment only cools off solvent gas, finish cooling effect after nitrogen just directly be disposed among the atmosphere by described gas exhaust piping 14, described heater base has more a heater 105 to melt the solvent that is frozen into solid, and moisture that has melted and solvent flow into described solvent via the solvent pipe 13 of described heat exchanger 10 bottoms again and leave standstill groove 131, leaving standstill in the groove 131 at described solvent utilizes the relation of gravity and density that solvent and moisture are become two-phase, utilize a solvent pump 133 that the solvent on upper strata is extracted the effect that reaches solvent recovery to described solvent storage groove 132 storages again, and described solvent leaves standstill the solvent gas that produced in the groove 131 and can be extracted by described vented drum blower fan 122 again and enter the effect of reaching backflow in the described heat exchanger, improves solvent recovering yield; For security consideration, just in case when described solvent recovery unit because the excessive situation of any reason build-up of pressure, and produce when the doubt of explosion danger is arranged, just described safety valve 126 can open too much pressure is discharged, to avoid the doubt on the safety.
More than explanation is just illustrative for the utility model; and nonrestrictive, those of ordinary skills understand, under the situation of the spirit and scope that do not break away from claim and limited; can make many modifications, variation or equivalence, but all will fall within the protection domain of the present utility model.
Claims (10)
1. a liquid nitrogen solvent recovery unit is characterized in that, described solvent recovery unit comprises:
At least one heat exchanger (10) that supplies high-temperature gas and cryogenic gas to carry out heat exchange is provided with at least one filter (101) in the described heat exchanger (10);
At least one cryogenic pipe (11), an end of described cryogenic pipe (11) is communicated with described heat exchanger (10), and the other end is communicated with a liquid nitrogen accumulator tank (111);
At least one high temperature conduit (12), an end of described high temperature conduit (12) is communicated with described heat exchanger (10), and the other end is communicated with a solvent gas source (121);
At least one solvent pipe (13), described solvent pipe (13) one ends are communicated with described heat exchanger (10) bottom, and the other end leaves standstill groove (131) with a solvent and is communicated with; And
At least one gas exhaust piping (14), described gas exhaust piping (14) one ends are communicated with described heat exchanger (10) top, and the other end is communicated with open air.
2. according to the described liquid nitrogen solvent recovery unit of claim 1, it is characterized in that: described heat exchanger (10) more comprises a condenser pipe (102), a housing (103) and a heater (105), being provided with described cryogenic pipe (11) between the inlet of described condenser pipe (102) and a liquid nitrogen accumulator tank (111) is communicated with, be provided with described high temperature conduit (12) between the inlet of described housing (103) and described solvent gas source (121) and be communicated with, this heater (105) is arranged at the bottom of this heat exchanger (10);
Described solvent recovery unit more comprises at least two heat exchangers (10), the outlet of a condenser pipe (102) is communicated with by described cryogenic pipe (11) with the inlet of another condenser pipe (102) in the condenser pipe (102) of described two heat-exchanger (10), and the outlet of a housing (103) is communicated with by described high temperature conduit (12) with the inlet of another housing (103) in the housing (103) of described two heat-exchanger (10).
3. according to the described liquid nitrogen solvent recovery unit of claim 2, it is characterized in that: described high temperature conduit (12) is provided with the vented drum blower fan (122) that at least one extracting gases enters described heat exchanger (10) between described solvent gas source (121) and the described heat exchanger (10), the inlet of described vented drum blower fan (122) is communicated with described solvent gas source (121), and its outlet is communicated with described heat exchanger (10).
4. according to the described liquid nitrogen solvent recovery unit of claim 3, it is characterized in that: described high temperature conduit (12) is provided with the cooling unit (123) of at least one cooling and filtering gas between described vented drum blower fan (122) and the described solvent gas source (121), the inlet of described cooling unit (123) is communicated with described solvent gas source (121), its outlet is communicated with described vented drum blower fan (122), has more a safety valve (126) between this cooling unit (123) and this solvent gas source (121) and is in communication with the outside.
5. according to the described liquid nitrogen solvent recovery unit of claim 4, it is characterized in that: have a cooler (124) and a filter (125) in the described cooling unit (123), described filter (125) is arranged on the porch of described cooling unit (123);
Be different from cryogenic pipe (11) one ends that are communicated with described condenser pipe (102) and be communicated with the outlet of described condenser pipe (102), the other end is communicated with the inlet of the cooler (124) of described cooling unit (123);
The outlet of described cooler (124) is in communication with the outside;
Be different from and have described gas exhaust piping (14) between the outlet that is communicated with described housing (103) and the described external world and be communicated with.
6. according to the described liquid nitrogen solvent recovery unit of claim 1, it is characterized in that: described cryogenic pipe (11) and described high temperature conduit (12) are provided with one respectively with described heat exchanger (10) place of connection can and contain the atomization unit (104) that solvent gas goes out with atomized spray with liquid nitrogen;
Described heat exchanger (10) comprises that more one is arranged on described heat exchanger (10) top and the air pipe line (15) and that is communicated with described heat exchanger is arranged at the heater (105) of the bottom of this heat exchanger (10).
7. according to the described liquid nitrogen solvent recovery unit of claim 6, it is characterized in that: described high temperature conduit (12) is provided with the vented drum blower fan (122) that at least one extracting gases enters described heat exchanger (10) between described solvent gas source (121) and the described heat exchanger (10), the inlet of described vented drum blower fan (122) is communicated with described solvent gas source (121), and its outlet is communicated with described heat exchanger (10).
8. according to the described liquid nitrogen solvent recovery unit of claim 7, it is characterized in that: described high temperature conduit (12) is provided with at least one the cooling and the cooling unit (123) of filter solvents gas between described vented drum blower fan (122) and the described solvent gas source (121), the inlet of described cooling unit (123) is communicated with described solvent gas source (121), its outlet is communicated with described vented drum blower fan (122), has more a safety valve (126) between this cooling unit (123) and this solvent gas source (121) and is in communication with the outside.
9. described according to Claim 8 liquid nitrogen solvent recovery unit, it is characterized in that: have a cooler (124) and a filter (125) in the described cooling unit (123), described filter (125) is arranged on the porch of described cooling unit (123);
Be communicated with between the inlet of described cooler (124) and the outlet of described heat exchanger (10), have described gas exhaust piping (14) between the outlet of described cooler (124) and the external world and be communicated with.
10. according to claim 1,5 or 9 described liquid nitrogen solvent recovery units, it is characterized in that: described solvent leaves standstill groove (131) and comprises that more one can collect the solvent storage groove (132) of the upper strata solvent that utilizes density and Gravity Separation, and the top that described solvent leaves standstill groove (131) has described high temperature conduit (12) with described vented drum blower fan (122) and is communicated with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201366640U CN201353437Y (en) | 2008-12-24 | 2008-12-24 | Liquid nitrogen solvent recycling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201366640U CN201353437Y (en) | 2008-12-24 | 2008-12-24 | Liquid nitrogen solvent recycling device |
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| Publication Number | Publication Date |
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| CN201353437Y true CN201353437Y (en) | 2009-12-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2008201366640U Expired - Fee Related CN201353437Y (en) | 2008-12-24 | 2008-12-24 | Liquid nitrogen solvent recycling device |
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| CN (1) | CN201353437Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108993087A (en) * | 2018-08-24 | 2018-12-14 | 李利平 | A kind of benzene recyclable device for the tail gas containing benzene |
-
2008
- 2008-12-24 CN CNU2008201366640U patent/CN201353437Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108993087A (en) * | 2018-08-24 | 2018-12-14 | 李利平 | A kind of benzene recyclable device for the tail gas containing benzene |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091202 Termination date: 20111224 |