CN213482109U - Volatile organic compounds characteristic detection device that desublimates - Google Patents
Volatile organic compounds characteristic detection device that desublimates Download PDFInfo
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- CN213482109U CN213482109U CN202022060986.5U CN202022060986U CN213482109U CN 213482109 U CN213482109 U CN 213482109U CN 202022060986 U CN202022060986 U CN 202022060986U CN 213482109 U CN213482109 U CN 213482109U
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- 238000001514 detection method Methods 0.000 title claims abstract description 48
- 239000012855 volatile organic compound Substances 0.000 title claims abstract description 35
- 239000005416 organic matter Substances 0.000 claims abstract description 78
- 238000001816 cooling Methods 0.000 claims abstract description 16
- 150000002894 organic compounds Chemical class 0.000 claims abstract description 9
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 15
- 235000011089 carbon dioxide Nutrition 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
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- 238000010438 heat treatment Methods 0.000 abstract description 3
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- 238000000034 method Methods 0.000 description 14
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 7
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000003463 adsorbent Substances 0.000 description 3
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- 238000001179 sorption measurement Methods 0.000 description 2
- 238000000859 sublimation Methods 0.000 description 2
- 230000008022 sublimation Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000004227 thermal cracking Methods 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
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- 229910001873 dinitrogen Inorganic materials 0.000 description 1
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- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
A volatile organic compound desublimation characteristic detection device comprises a tail gas configuration part, a deep cooling part, a bypass part, a rewarming part, a first organic compound concentration detection port and a second organic compound concentration detection port. The tail gas configuration part comprises a gas source, an organic matter saturator and an organic matter filter, wherein the gas source is communicated with the organic matter saturator, and an outlet of the organic matter saturator is communicated with an inlet of the organic matter filter. The deep cooling part comprises a precooling heat exchanger, a vortex tube and a trapping condenser box; the hot side inlet of the precooling heat exchanger is communicated with the outlet of the organic matter filter, the hot side outlet of the precooling heat exchanger is communicated with the cold side inlet of the vortex tube, and the cold side outlet of the vortex tube is communicated with the inlet of the trapping condenser box. The bypass part comprises a bypass pipeline, and the air source is communicated with the cold side inlet of the precooling heat exchanger through the bypass pipeline. The rewarming part comprises a rewarming heat exchanger; and a cold side inlet of the reset heat exchanger is communicated with an outlet of the trapping condenser box, and a hot side inlet of the reset heat exchanger is used for inputting a heating medium. The utility model discloses the desublimation characteristic of detectable volatile organic compounds.
Description
Technical Field
The utility model relates to a test device field of low temperature degree of desublimation especially relates to a volatile organic compounds characteristic detection device that desublimates.
Background
The tail gas contains volatile organic compounds, which are the main source of atmospheric pollution. Tail gas treatment has been a concern for countries and enterprises. The national environmental standards are becoming more and more strict, and the requirements for the treatment process of the tail gas are also becoming more and more strict. The existing volatile organic compound treatment process comprises a condensation method, an adsorption method, a thermal cracking method, a cryogenic cooling method and the like.
The condensation method is suitable for tail gas of high-concentration volatile organic compounds, and has poor effect on the tail gas of low concentration. The adsorption method is suitable for low-concentration tail gas, but the tail gas often contains a plurality of organic components, and all the organic components are difficult to be completely desorbed in the regeneration process of the adsorbent, so that the problems that the deactivation speed of the adsorbent is high, and the deactivated adsorbent is difficult to treat exist. The thermal cracking method can effectively treat low-concentration tail gas, but has the problems of high consumption, high cost and incapability of recovering organic matters. The cryogenic method utilizes the characteristic of organic matter desublimation at low temperature, reduces the temperature by virtue of the expansion effect of tail gas, enables the tail gas to be cooled to the extremely low temperature, and then removes the organic matter after being trapped by a hot melting condensation box, can better solve the problems of the previous processes, and can also recover the organic matter. However, the cryogenic method requires data on the sublimation and crystallization of organic substances at extremely low temperatures, the gas-solid phase equilibrium, and the like.
Disclosure of Invention
The utility model aims to solve the technical problem that a volatile organic compounds characteristic detection device that desublimates is provided, it can detect the desublimating characteristic of volatile organic compounds at low temperature.
The utility model provides a volatile organic compounds characteristics detection device that desublimates, including tail gas configuration part, cryrogenic part, bypass part, rewarming part, first organic matter concentration detection mouth and second organic matter concentration detection mouth; the tail gas configuration part comprises a gas source, an organic matter saturator and an organic matter filter, wherein the gas source is communicated with the organic matter saturator, and an outlet of the organic matter saturator is communicated with an inlet of the organic matter filter; the organic matter saturator is filled with liquid-phase volatile organic matters; the deep cooling part comprises a precooling heat exchanger, a vortex tube and a trapping condenser box; the hot side inlet of the precooling heat exchanger is communicated with the outlet of the organic matter filter, the hot side outlet of the precooling heat exchanger is communicated with the cold side inlet of the vortex tube, the cold side outlet of the vortex tube is communicated with the inlet of the trapping condensing box, and the hot side outlet of the vortex tube is provided with a control valve; the bypass portion includes a bypass conduit; the air source is communicated with a cold side inlet of the precooling heat exchanger through a bypass pipeline; the gas entering the cold side inlet of the precooling heat exchanger is used for carrying out heat exchange with the organic matter mixed gas entering the hot side inlet of the precooling heat exchanger; the rewarming part comprises a rewarming heat exchanger; a cold side inlet of the reset heat exchanger is communicated with an outlet of the trapping condenser box, a hot side inlet of the reset heat exchanger is used for inputting a heat medium, and the heat medium is used for carrying out heat exchange with the organic matter mixed gas entering the cold side inlet of the reset heat exchanger; the first organic matter concentration detection port is communicated with an outlet of the organic matter filter and a hot side inlet of the precooling heat exchanger respectively, and the second organic matter concentration detection port is communicated with a cold side outlet of the resetting heat exchanger; the first organic matter concentration detection port and the second organic matter concentration detection port are respectively used for being connected to an external concentration detection device.
Preferably, dry ice is arranged in the precooling heat exchanger; the whole trapping condenser box is immersed in a container filled with dry ice, and heat preservation is realized through the dry ice.
The utility model discloses at least, have following advantage:
1. the embodiment of the utility model can detect the desublimation characteristic of volatile organic compounds at low temperature, and provides theoretical support for the process design of the cryogenic method;
2. the embodiment of the utility model provides a can obtain the gas that the temperature is very low simply through the mating reaction of dry ice and vortex tube, can detect out the desublimation characteristic of most volatile organic compounds at low temperature.
Drawings
Fig. 1 shows a schematic structural diagram of a volatile organic compound desublimation characteristic detection apparatus according to an embodiment of the present invention.
Fig. 2 shows a partially enlarged schematic view of a portion P of fig. 1.
Detailed Description
The present invention will be described in detail with reference to the following embodiments, but the present invention is not limited thereto.
Fig. 1 shows a schematic structural diagram of a volatile organic compound desublimation characteristic detection apparatus according to an embodiment of the present invention. As shown in fig. 1, a volatile organic compound desublimation characteristic detection apparatus according to an embodiment of the present invention includes a tail gas configuration portion, a deep cooling portion, a bypass portion, a rewarming portion, a first organic compound concentration detection port and a second organic compound concentration detection port.
The tail gas configuration part comprises a gas source 1, an organic matter saturator 2 and an organic matter filter 3. The gas source 1 is communicated with the organic matter saturator 2, and the outlet of the organic matter saturator 2 is communicated with the inlet of the organic matter filter 3.
In this embodiment, the gas source 1 is a cylinder nitrogen gas. In other embodiments, the source of the dried compressed air may also be selected based on the nature of the volatile organic compounds.
The organic saturator 2 is filled with liquid phase volatile organic compound, which is cyclohexane in this embodiment. In other embodiments, the volatile organic compound may be benzene, toluene, xylene, etc. for different conditions. The organic saturator 2 comprises a housing 21, and the shape of the housing 21 includes, but is not limited to, a cylinder, a cube, a cuboid, a cone, etc., and in this embodiment, the cylinder is adopted for convenience of processing. The housing 21 has an inner cavity 20 for storing volatile organic compounds in liquid phase, and a wire mesh demister 22 is disposed at an upper portion of the inner cavity 20. The outlet 28 of the organic saturator is in communication with the inner chamber 20 and is located above the wire mesh demister 22. An air inlet pipeline 23 is arranged at the bottom of the inner cavity 20, one end of the air inlet pipeline 23 is communicated with the air source 1, the other end of the air inlet pipeline 23 is closed, and a plurality of air outlet holes 231 (see fig. 2) are formed in the side surface of the air inlet pipeline 23. Optionally, the plurality of air outlets 231 are uniformly distributed, and the diameter of each air outlet is 0.2cm to 0.5cm, so as to ensure uniform distribution of the inlet air.
Further, the tail gas configuration part comprises a temperature control device 9, and the temperature control device 9 is used for controlling the temperature of the mixed gas (in this embodiment, the mixture of nitrogen and cyclohexane) output from the outlet 28 of the organic matter saturator. The temperature control device 9 may be a water bath device, an oil bath device or a sand bath device, and the lower portion of the organic saturator 2 is placed in the water bath device, the oil bath device or the sand bath device. In this embodiment, the temperature control device is a water bath device, the water bath device 9 has no top cover, and ice cubes or water can be put into the water bath device, so that the temperature of the gas at the outlet of the organic matter saturator 2 is controlled at the design temperature.
In this embodiment, the organic matter filter 3 can filter out liquid organic matters having a diameter of 20 μm or more.
The cryogenic section includes a pre-cooling heat exchanger 4, a vortex tube 5 and a catch condenser tank 6. The hot side inlet of the pre-cooling heat exchanger 4 is communicated with the outlet of the organic matter filter 3, the hot side outlet of the pre-cooling heat exchanger 4 is communicated with the inlet of the vortex tube 5, the cold side outlet 56 of the vortex tube 5 is communicated with the inlet 67 of the trapping condenser box 6, a control valve (not shown in the figure, the control valve arranged at the hot side outlet of the vortex tube 5 is the prior art) is arranged at the hot side outlet 58 of the vortex tube 5, and the flow and the temperature of the air flow output by the cold side outlet 56 and the hot side outlet 58 of the vortex tube 5 can be adjusted by controlling the.
In this embodiment, precooling heat exchanger 4 is a coil heat exchanger, and the appearance is the cylinder, has the advantage that the heat transfer effect is better, gas dwell time is long. In other embodiments, the pre-cooling heat exchanger 4 may also be a double pipe heat exchanger or a U-tube heat exchanger.
Preferably, dry ice is provided in the pre-cooling heat exchanger 4. The melting point of the dry ice is-78.5 ℃, and the temperature of the organic matter mixed gas can be reduced to a sufficiently low temperature by adding the dry ice into the precooling heat exchanger 4 and purging with nitrogen. The vortex tube 5 selected in the embodiment has the temperature reduction effect of not less than 30 ℃, and can reach the minimum of-80 ℃ under the condition of ensuring the inlet air temperature.
In the present embodiment, the catch condenser box 6 includes a box body 61, the shape of the box body 61 includes, but is not limited to, a rectangular parallelepiped, a square, a cylindrical shape, and the like, and the rectangular parallelepiped is adopted in the present embodiment for the purpose of processing convenience. The box body 61 is provided with a chamber 60, a plurality of transverse baffles 62 are arranged in the chamber 60 in a left-right staggered manner or a front-back staggered manner, and the plurality of transverse baffles 62 are arranged from top to bottom and can be detached. The material of the baffle plate 62 includes, but is not limited to, stainless steel, carbon steel, plastic, cardboard, etc. A filter screen 63 is detachably arranged in the chamber 60, and the filter screen 63 is arranged above the plurality of transverse baffles 62 and can be detachably replaced. The outlet 68 of the catch condenser box 6 is provided above the screen 63, and the inlet 67 of the catch condenser box 6 is provided below the plurality of lateral baffles 62. Preferably, the catch condenser box 6 is placed wholly immersed in a container (not shown) filled with dry ice, and the heat preservation is achieved by the dry ice.
The bypass part comprises a bypass pipeline 7, the gas source 1 is communicated with a cold side inlet of the precooling heat exchanger 4 through the bypass pipeline 7, and gas entering the cold side inlet of the precooling heat exchanger 4 is used for carrying out heat exchange with organic matter mixed gas entering a hot side inlet of the precooling heat exchanger 4.
The rewarming part comprises a rewarming heat exchanger 8. The cold side inlet 85 of the reset heat exchanger 8 is communicated with the outlet 68 of the trapping condenser tank 6, and the hot side inlet 87 of the reset heat exchanger 8 is used for inputting a heating medium which is used for exchanging heat with the organic matter mixed gas entering the cold side inlet 85, wherein the heating medium can be air or water. The hot side outlet 88 of the reset heat exchanger 8 is also shown.
In this embodiment, the rewarming heat exchanger 8 is a coiled heat exchanger, and in other embodiments, a double-pipe heat exchanger or a U-pipe heat exchanger may be used, or other rewarming forms may be used instead, including but not limited to jacket, water bath, oil bath, etc.
The first organic matter concentration detection port 101 is respectively communicated with the outlet of the organic matter filter 3 and the hot side inlet of the precooling heat exchanger 4, and the second organic matter concentration detection port 102 is communicated with the cold side outlet 86 of the resetting heat exchanger 8; the first organic matter concentration detection port 101 and the second organic matter concentration detection port 102 are respectively used for accessing an external concentration detection device. Temperature detection devices, such as temperature transmitters, are respectively arranged at the outlet of the organic matter saturator 3, the inlet of the vortex tube 5 and the cold-side outlet of the vortex tube 5.
The working flow of the volatile organic compound desublimation characteristic detection device according to the embodiment of the utility model is roughly as follows.
The nitrogen of the steel cylinder is used as the gas source of the whole system and is divided into two paths. One path of the air is used as purge air, enters the precooling heat exchanger 4 to purge dry ice, and accelerates sublimation of the dry ice so as to obtain cold energy; the other path of the tail gas is used as simulated tail gas, enters an organic matter saturator 2, is fully contacted with liquid-phase organic matter, is subjected to liquid drop removal through a wire mesh demister 22 and an organic matter filter 3, enters a precooling heat exchanger 4 to be cooled to-40 to-50 ℃, then enters a vortex tube 5 to be expanded to do work, cryogenic gas with the temperature of-50 to-80 ℃ is obtained, and the gas-phase organic matter contained at the time is subjected to a desublimation phenomenon and is crystallized on the wall of the tube along the way. The simulation tail gas after deep cooling enters a trapping and condensing tank 6 for free settling, the undeposited cyclohexane particles are filtered by a filter screen 63, and then the organic matter mixed gas enters a rewarming heat exchanger 8 for heat exchange with circulating water to 0-20 ℃ and then the cyclohexane concentration is measured.
The test apparatus of this example can obtain data such as initial desublimation temperature of volatile organic compounds at low temperature, relationship between desublimation and temperature, and organic concentration at different temperatures. By controlling the opening degree of the control valve of the vortex tube 5, the temperature of the organic matter mixed gas output from the cold side outlet of the vortex tube 5 can be changed, and the concentration of the organic matter in the gas flow output from the cold side outlet of the rewarming heat exchanger 8 can be further changed. By recording the temperature of the organic matter mixed gas output from the outlet of the cold side of the vortex tube 5 and the concentration of the organic matter in the air flow output from the rewarming heat exchanger 8, the data of the concentration of the organic matter at different temperatures can be obtained. By calculating the difference between the organic matter concentrations detected by the first organic matter concentration detection port 101 and the second organic matter concentration detection port 102, the relationship between the desublimation rate and the temperature of the organic matter mixed gas output from the cold-side outlet of the vortex tube can be obtained. The temperature of the organic matter mixed gas output by the organic matter saturator 2 can be controlled by the temperature control device 9, and the initial desublimation temperature of the volatile organic matter at a low temperature can be determined by monitoring the difference of the organic matter concentrations measured by the first organic matter concentration detection port 101 and the second organic matter concentration detection port 102.
The embodiment of the utility model provides a can get rid of volatile organic compounds better through dry ice precooling + vortex tube expansion cryrogenic two-stage cooling, can obtain the simulation tail gas of arbitrary concentration between 1-2000ppm, 0-/-75 ℃ of arbitrary temperature to detectable above-mentioned tail gas is through the desublimation characteristic of volatile organic compounds behind the cryrogenic.
The foregoing description is provided to further illustrate the present invention in connection with the detailed description and the accompanying drawings. However, it is obvious that the present invention can be implemented in various other ways than those described herein, and those skilled in the art can make popularization and deduction according to actual use without departing from the content of the present invention, and therefore, the content of the above specific embodiments should not limit the scope of protection determined by the present invention.
Claims (10)
1. A volatile organic compound desublimation characteristic detection device is characterized by comprising a tail gas configuration part, a deep cooling part, a bypass part, a rewarming part, a first organic compound concentration detection port and a second organic compound concentration detection port;
the tail gas configuration part comprises a gas source, an organic matter saturator and an organic matter filter, wherein the gas source is communicated with the organic matter saturator, and an outlet of the organic matter saturator is communicated with an inlet of the organic matter filter; the organic matter saturator is filled with liquid-phase volatile organic matters;
the deep cooling part comprises a precooling heat exchanger, a vortex tube and a trapping condenser box; the hot side inlet of the pre-cooling heat exchanger is communicated with the outlet of the organic matter filter, the hot side outlet of the pre-cooling heat exchanger is communicated with the inlet of the vortex tube, the cold side outlet of the vortex tube is communicated with the inlet of the trapping condensing box, and the hot side outlet of the vortex tube is provided with a control valve;
the bypass portion comprises a bypass conduit; the air source is communicated with a cold side inlet of the precooling heat exchanger through the bypass pipeline; the gas entering the cold side inlet of the precooling heat exchanger is used for carrying out heat exchange with the organic matter mixed gas entering the hot side inlet of the precooling heat exchanger;
the rewarming part comprises a rewarming heat exchanger; the cold side inlet of the reset heat exchanger is communicated with the outlet of the trapping condenser box, the hot side inlet of the reset heat exchanger is used for inputting heat media, and the heat media are used for carrying out heat exchange with the organic matter mixed gas entering the cold side inlet of the reset heat exchanger;
the first organic matter concentration detection port is respectively communicated with an outlet of the organic matter filter and a hot side inlet of the precooling heat exchanger, and the second organic matter concentration detection port is communicated with a cold side outlet of the resetting heat exchanger; the first organic matter concentration detection port and the second organic matter concentration detection port are respectively used for being connected to an external concentration detection device.
2. The volatile organic compound desublimation characteristic detection device according to claim 1, wherein the tail gas configuration part comprises a temperature control device, and the temperature control device is used for controlling the temperature of the mixed gas output from the outlet of the organic compound saturator.
3. The apparatus for detecting the desublimation characteristic of a volatile organic compound according to claim 2, wherein the temperature control device is a water bath device, an oil bath device or a sand bath device, and the lower portion of the organic saturator is disposed in the water bath device, the oil bath device or the sand bath device.
4. The volatile organic compound desublimation characteristic detection device according to any one of claims 1 to 3, wherein the organic compound saturator comprises a housing, the housing is provided with an inner cavity capable of storing liquid-phase volatile organic compounds, and a wire mesh demister is arranged at the upper part of the inner cavity; the outlet of the organic matter saturator is communicated with the inner cavity and is positioned above the wire mesh demister;
and an air inlet pipeline is arranged at the bottom of the inner cavity, one end of the air inlet pipeline is communicated with the air source, the other end of the air inlet pipeline is closed, and a plurality of air outlet holes are formed in the side surface of the air inlet pipeline.
5. The volatile organic compound desublimation characteristic detection device of claim 4, wherein the diameter of the air outlet is 0.2 cm-0.5 cm.
6. The volatile organic compound desublimation characteristic detection device according to claim 1, wherein dry ice is arranged in the precooling heat exchanger; the trapping condenser box is wholly immersed in a container filled with dry ice, and heat preservation is achieved through the dry ice.
7. The volatile organic compound desublimation characteristic detection device according to claim 1 or 6, wherein the precooling heat exchanger is a coil heat exchanger, a double-pipe heat exchanger or a U-shaped pipe heat exchanger.
8. The volatile organic compound desublimation characteristic detection device according to claim 1, wherein the rewarming heat exchanger is a coil heat exchanger, a double-pipe heat exchanger or a U-shaped pipe heat exchanger.
9. The volatile organic compound desublimation characteristic detection device of claim 1, wherein the trapping condenser box comprises a box body, the box body is provided with a chamber, a plurality of transverse baffles are arranged in the chamber in a left-right staggered manner or a front-back staggered manner, and the plurality of transverse baffles are arranged from top to bottom;
a filter screen is detachably arranged in the chamber and is arranged above the transverse baffles; the entrance of the catching condenser box is arranged below the plurality of transverse baffles, and the exit of the catching condenser box is arranged above the filter screen.
10. The volatile organic compound desublimation characteristic detection device according to claim 1, wherein temperature detection devices are respectively arranged at the outlet of the organic compound saturator, the inlet of the vortex tube and the cold-side outlet of the vortex tube.
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| CN202022060986.5U CN213482109U (en) | 2020-09-18 | 2020-09-18 | Volatile organic compounds characteristic detection device that desublimates |
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| CN202022060986.5U CN213482109U (en) | 2020-09-18 | 2020-09-18 | Volatile organic compounds characteristic detection device that desublimates |
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Address after: 201108 Shanghai city Minhang District Huaning Road No. 3111 Patentee after: Shanghai Qiyao Energy saving Technology Co.,Ltd. Country or region after: China Address before: 201108 Shanghai city Minhang District Huaning Road No. 3111 Patentee before: SHANGHAI QIYAO EXPANDER Co.,Ltd. Country or region before: China |