CN110094632B - Low-temperature cold energy recovery device - Google Patents
Low-temperature cold energy recovery device Download PDFInfo
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- CN110094632B CN110094632B CN201910411947.4A CN201910411947A CN110094632B CN 110094632 B CN110094632 B CN 110094632B CN 201910411947 A CN201910411947 A CN 201910411947A CN 110094632 B CN110094632 B CN 110094632B
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- 238000011084 recovery Methods 0.000 title claims abstract description 72
- 239000012530 fluid Substances 0.000 claims abstract description 77
- 239000007788 liquid Substances 0.000 claims abstract description 67
- 238000009825 accumulation Methods 0.000 claims abstract description 52
- 239000006200 vaporizer Substances 0.000 claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 36
- 238000003860 storage Methods 0.000 claims description 24
- 239000003507 refrigerant Substances 0.000 claims description 23
- 239000011232 storage material Substances 0.000 claims description 9
- 239000012267 brine Substances 0.000 claims description 6
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 3
- 238000000926 separation method Methods 0.000 abstract description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 7
- 238000001816 cooling Methods 0.000 description 7
- 239000002826 coolant Substances 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000009834 vaporization Methods 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 230000008016 vaporization Effects 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 229910052786 argon Inorganic materials 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000002595 cold damage Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000012263 liquid product Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Abstract
The invention discloses a low-temperature cold energy recovery device, which comprises a vaporizer, an emptying cylinder arranged at the top of the vaporizer, and an energy recovery device connected to the vaporizer; the vaporizer is connected with a low-pressure steam pipe and a low-temperature fluid pipe, and a cut-off valve divides the low-temperature fluid pipe into a first fluid pipe section and a second fluid pipe section; the energy recovery device comprises at least two cold accumulation tanks, wherein each cold accumulation tank is provided with a tank inlet and a tank outlet, each tank inlet is connected with a low-temperature liquid inlet pipe and a first cold recovery pipe, and each tank outlet is connected with a low-temperature liquid outlet pipe and a second cold recovery pipe; each low-temperature liquid inlet pipe is communicated with a first fluid pipe section, and each low-temperature liquid outlet pipe is communicated with a second fluid pipe section; valves are arranged on the low-temperature liquid outlet pipe, the low-temperature liquid inlet pipe, the first cold energy recovery pipe and the second cold energy recovery pipe. The device is safe, stable and reliable, and can effectively recover the cold energy of unqualified low-temperature liquid or gas discharged by the air separation device.
Description
Technical Field
The invention belongs to the field of energy-saving comprehensive utilization of air separation devices, and particularly relates to a low-temperature cold energy recovery device.
Background
At present, all air cooling of the compression air separation device in the full-low-pressure hydrogen-free argon production adopts a nitrogen water precooling system, and the nitrogen water precooling system mainly comprises three devices: one is a nitrogen water tower for primarily cooling circulating water by means of polluted nitrogen gas discharged from a cold box, the other is a refrigerating unit (usually a lithium bromide absorption type water chiller or a Freon water chiller) for further cooling the primarily cooled circulating water, and the third is an air cooling tower for sequentially carrying out heat exchange and cooling on air, the circulating water and the cooled circulating water (chilled water). In the process of smooth operation, the air separation device can discharge more or less part of low-temperature liquid or gas (the liquid is mainly unqualified liquid argon, and the gas is the exhaust of a low-temperature liquid pump). In order to prevent the cold damage of the discharge device, steam is generally used to vaporize the cryogenic liquid during the discharge process, and during the vaporization process, not only is the cold of the cryogenic liquid lost, but also the steam is additionally consumed, which is obviously very uneconomical and environment-friendly.
In the prior art, there is a circulating water energy-saving cooling device utilizing cold energy of an air separation device, and the device comprises a shell formed by an upper shell and a lower shell, wherein an exhaust port is arranged at the top of the upper shell; the normal temperature circulating water inlet pipe, the packing layer and the air inlet pipe are sequentially arranged in the upper shell; the heat exchanger is arranged in the lower shell, and the two ends of an inlet and an outlet of the heat exchanger are respectively communicated with the cooling medium inlet pipe and the cooling medium outlet pipe; a chilled water outlet is arranged at the bottom of the lower shell. Although the device can utilize the vaporization of low temperature liquid product to reduce the temperature of circulating water, its scene of using is comparatively limited, and energy-conserving effect is limited. Because the device can only be used when the air separation device is stopped and the air supply device is required to supply the products outwards, the air separation device is stopped at the moment, the produced chilled water is not used, and the chilled water pump and the turbulent water pump consume redundant electric quantity instead, so that the air separation device cannot be lost. The device has a complex structure, and the circulating water side is easy to scale, so that the difficulty is brought to scale cleaning maintenance. Therefore, how to effectively recycle the cold energy of the air separation unit is not solved.
Disclosure of Invention
Aiming at the problems and the defects, the invention provides a device which has reasonable structural design, is safe, stable and reliable and can effectively recover the cold energy of unqualified low-temperature liquid or gas discharged by an air separation device, and the specific technical scheme is as follows:
the low-temperature cold energy recovery device comprises a vaporizer, an emptying cylinder arranged at the top of the vaporizer and an energy recovery device connected to the vaporizer, wherein the vaporizer is provided with an inner cavity, and the emptying cylinder is communicated with the inner cavity of the vaporizer;
The vaporizer is connected with a low-pressure steam pipe and a low-temperature fluid pipe, and a cut-off valve is arranged on the low-temperature fluid pipe and divides the low-temperature fluid pipe into a first fluid pipe section and a second fluid pipe section; one end of the second fluid pipe section, which is away from the first fluid pipe section, extends into the inner cavity of the vaporizer and is formed into a cryogenic fluid outlet end; one end of the low-pressure steam pipe extends into the inner cavity of the carburetor;
The energy recovery device comprises at least two cold accumulation tanks, wherein each cold accumulation tank is provided with a tank inlet and a tank outlet, each tank inlet is connected with a low-temperature liquid inlet pipe and a first cold recovery pipe, and each tank outlet is connected with a low-temperature liquid outlet pipe and a second cold recovery pipe; each low-temperature liquid inlet pipe is communicated with a first fluid pipe section, and each low-temperature liquid outlet pipe is communicated with a second fluid pipe section;
a liquid outlet pipe cut-off valve is arranged on each low-temperature liquid outlet pipe, a liquid inlet pipe cut-off valve is arranged on each low-temperature liquid inlet pipe, a first cold quantity cut-off valve is arranged on each first cold quantity recovery pipe, and a second cold quantity cut-off valve is arranged on each second cold quantity recovery pipe.
When the recovery device works, firstly, low-temperature fluid enters the cold accumulation tank, cold energy in the low-temperature fluid is stored in the cold accumulation tank, after cold accumulation is completed, the low-temperature fluid is switched into a refrigerant, and the cold energy stored in the cold accumulation tank is recovered by the refrigerant and is used for other production. After at least two cold accumulation tanks are arranged, the cold accumulation tanks can be used in turn to form continuous work so as to provide stable cold recovery quantity. The refrigerant may be circulating cooling water for supplying cooling capacity to the outside. By utilizing the invention, the purposes of reducing the load of the refrigerating unit of the precooling system and even canceling the refrigerating unit and normal and stable operation can be achieved while the cold is effectively recovered, and the low-pressure steam quantity required by the vaporization of the low-temperature liquid is reduced, thereby effectively reducing the investment and energy consumption of enterprises and realizing the purposes of energy conservation and consumption reduction.
Specifically, the cold accumulation tank comprises a shell and a plurality of tubes arranged in the shell, a cold accumulation cavity is formed in the space between the tubes and the shell, and cold accumulation agent is filled in the cold accumulation cavity; one end of any one of the plurality of tubes is communicated with the tank inlet, and the other end of any one of the plurality of tubes is communicated with the tank outlet. Preferably, the cold storage agent is water or brine. In the cold storage tank, a cold storage agent is stored, cold energy of low-temperature fluid passing through the tube array is firstly absorbed by the cold storage agent, then cold energy absorbed by the cold storage agent is recovered by the refrigerant passing through the tube array, the low-temperature fluid and the refrigerant flow through the tube array, and the cold storage agent is limited in the cold storage tank so as to regulate the outflow temperature of the refrigerant. In particular, when water or brine is used as a coolant, a high-quality coolant can be obtained from a large amount of heat of solution absorbed or released when water or brine undergoes phase change between liquid and solid.
The adoption of water or brine as the cold accumulation agent can avoid the pollution of circulating cooling water when the cold accumulation agent leaks.
Further, in order to prevent the internal pressure of the regenerator tank from becoming excessive due to the volume expansion of the regenerator, the regenerator tank is placed in a dangerous state, and an expansion joint is provided in the housing corresponding to the regenerator chamber.
Further, a tube plate is respectively arranged at two ends of the shell, and the plurality of tubes are hermetically arranged on the tube plate; the space outside the tube array between the two tube plates is formed into the cold accumulation cavity, the inner cavity of the shell outside the cold accumulation cavity is formed into a fluid area, the bottom of the shell is provided with an exhaust valve for exhausting the fluid area, and the top of the shell is provided with an exhaust valve for exhausting air in the fluid area.
The exhaust valve is arranged so as to facilitate the fluid in the tube array to be exhausted when the fluid entering the tube array is switched, so that the mutual mixing amount of the two fluids is reduced, and meanwhile, the exhaust valve is arranged so as to accelerate the exhausting speed of the low-temperature fluid in the fluid area and reduce the retention amount of air in the fluid area, and the recovery efficiency of cold energy is improved.
In order to facilitate the vaporization of the cryogenic fluid, particularly a cryogenic liquid, a spray head is mounted on the cryogenic fluid outlet end; or an injection hole is arranged on the outlet end of the low-temperature fluid.
When the low-temperature cold energy recovery device works, low-temperature fluid enters the cold accumulation tank through the first fluid pipe section and the tank inlet, enters the inner cavity of the vaporizer through the second fluid pipe section and the tank outlet, and is discharged from the emptying cylinder after being mixed with steam entering the vaporizer through the low-pressure steam pipe; after a cold accumulation tank finishes cold accumulation, a liquid outlet pipe cut-off valve and a liquid inlet pipe cut-off valve of the cold accumulation tank are closed; the refrigerant enters the cold storage tank from one of the first cold energy recovery pipe and the second cold energy recovery pipe, is discharged out of the cold storage tank from the other of the first cold energy recovery pipe and the second cold energy recovery pipe, and recovers the cold energy absorbed by the cold storage tank.
When the cold accumulation tank works, the cold accumulation tank adopts a discontinuous working mode, firstly, the cold quantity of low-temperature fluid is stored in the cold accumulation tank, then the stored cold quantity is recovered by using a refrigerant, and the cold quantity is recovered in an indirect mode. The method can be used for recovering cold energy, and the temperature of the refrigerant when the refrigerant is discharged out of the cold accumulation tank can be set so as to provide the refrigerant with the set temperature for the downstream, thereby reducing fluctuation of downstream production and ensuring the stability of production.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic structural view of the cold accumulation tank.
Detailed Description
The technical scheme of the present invention is described in detail by examples below, but the scope of the present invention is not limited to the examples.
Referring to fig. 1, a low-temperature cold energy recovery device includes a vaporizer 10, an emptying cylinder 14 disposed at the top of the vaporizer, and an energy recovery device 200 connected to the vaporizer 10.
The carburetor 10 is embodied as a cylinder extending in a horizontal direction, and has an inner cavity 101 therein, and the vent cylinder 14 is located at one end of the carburetor 10 and communicates with the inner cavity 101 of the carburetor. A low pressure steam pipe 11 extends from the other end of the carburetor into the inner chamber 101, and a steam shut-off valve 12 is mounted on the low pressure steam pipe 11. To facilitate control and observation of the temperature of the interior cavity 101, a vaporizer thermometer 13 is mounted on the vaporizer 10.
A shut-off valve 21 is mounted on the cryogenic fluid pipe 20, the shut-off valve 21 dividing the cryogenic fluid pipe 20 into a first fluid pipe section 22 and a second fluid pipe section 23, the end of the second fluid pipe section 23 facing away from the first fluid pipe section 21 extending into the interior cavity 101 of the vaporizer 10 and being formed as a cryogenic fluid outlet end 24. In this embodiment, a plurality of injection holes with upward outlets are formed at the cryogenic fluid outlet end 24, and the plurality of injection holes are arranged along the extending direction of the second fluid pipe section. It will be appreciated that in other embodiments, a spray head may be mounted at the cryogenic fluid outlet end to atomize the cryogenic fluid to accelerate mixing with and vaporisation of the vapour exiting the low pressure vapour line.
In the present embodiment, two regenerator tanks are provided, which are referred to as a first regenerator tank 71 and a second regenerator tank 72, respectively, for convenience of description.
Referring to fig. 2, the first cold storage tank 71 is a horizontal tank, and has a housing 711, where the housing 711 includes a cylindrical portion 81, and a first elliptical head 83 and a second elliptical head 84 mounted at two ends of the cylindrical portion 81, the first elliptical head 83 is provided with a tank inlet 718, and the second elliptical head 84 is provided with a tank outlet 719. A first tube plate 713 and a second tube plate 714 are disposed at two ends of the cylindrical portion, wherein the first tube plate 713 is on the same side as the first elliptical head 83, and the second tube plate 714 is on the same side as the second elliptical head 84. The two ends of the tube array 712 are fixedly mounted on the first tube plate 713 and the second tube plate 714 in a sealing manner and penetrate through the first tube plate 713 and the second tube plate 714, so that the two ends of the tube array 712 are respectively communicated with the tank inlet 718 and the tank outlet 719. In the case, a space between the tube array and the cylindrical portion is formed as a cold storage chamber, and a cold storage agent 710 is poured into the cold storage chamber. The inner cavity of the shell outside the cold accumulation cavity is formed into a fluid area, and in this embodiment, the inner cavity of the tube array and the space between the two tube plates and the elliptical heads on the same side are the fluid areas. A discharge valve 716 communicating with the fluid region is installed at the top of the cylindrical part 81, and a discharge valve 717 communicating with the fluid region is installed at the bottom of the cylindrical part 81, so that the gas and the low-temperature liquid in the cold storage tank can be discharged conveniently.
In this embodiment, the coolant 710 is water. It is understood that in other embodiments, brine may also be used for the coolant 710.
In order to prevent the cold storage agent from damaging the device due to expansion during the phase change, an expansion joint 715 is provided on the cylindrical portion, i.e., on the housing corresponding to the cold storage chamber.
The structure of the second regenerator 72 is the same as that of the first regenerator 71, and will not be described again.
With continued reference to fig. 1, a low-temperature liquid inlet pipe a31 and a first cold recovery pipe a32 are connected to a tank inlet 718 of the first cold storage tank 71, and a low-temperature liquid outlet pipe a41 and a second cold recovery pipe a42 are connected to a tank outlet 719. A low-temperature liquid inlet pipe B36 and a first cold energy recovery pipe B37 are connected to the inlet of the second cold accumulation tank 72, and a low-temperature liquid outlet pipe B46 and a second cold energy recovery pipe B47 are connected to the outlet. The low temperature liquid inlet pipe A31 and the low temperature liquid inlet pipe B36 are communicated with the first fluid pipe section 22 through the low temperature liquid inlet main pipe 30. The low temperature outlet pipe A41 and the low temperature outlet pipe B46 are communicated with the second fluid pipe section 23 through the low Wen Chuye main pipe 40.
Each cold accumulation tank is provided with a tank inlet and a tank outlet, each tank inlet is connected with a low-temperature liquid inlet pipe and a first cold energy recovery pipe, and each tank outlet is connected with a low-temperature liquid outlet pipe and a second cold energy recovery pipe; each low-temperature liquid inlet pipe is communicated with a first fluid pipe section, and each low-temperature liquid outlet pipe is communicated with a second fluid pipe section;
A first liquid inlet pipe cut-off valve 311 is installed on the low-temperature liquid inlet pipe a31, and a second liquid inlet pipe cut-off valve 361 is installed on the low-temperature liquid inlet pipe B36, namely, a liquid inlet pipe cut-off valve is installed on each low-temperature liquid inlet pipe. A first drain pipe shut-off valve 411 is mounted on the low temperature drain pipe a41, and a second drain pipe shut-off valve 461 is mounted on the low temperature drain pipe B46, i.e. a drain pipe shut-off valve is mounted on each low temperature drain pipe.
The first cold energy recovery pipes a32 are provided with first cold energy cut-off valves a321, and the first cold energy recovery pipes B37 are provided with first cold energy cut-off valves B371, namely, each first cold energy recovery pipe is provided with a first cold energy cut-off valve. The second cold energy recovery pipes a42 are provided with second cold energy cut-off valves a421, and the second cold energy recovery pipes B47 are provided with second cold energy cut-off valves B471, i.e. each second cold energy recovery pipe is provided with a second cold energy cut-off valve.
In the present embodiment, the second cold energy recovery pipe a42 and the second cold energy recovery pipe B47 are connected to a refrigerant input pipe 44, and the first cold energy recovery pipe a32 and the first cold energy recovery pipe B37 are connected to a refrigerant output pipe 34, that is, in the present embodiment, the second cold energy recovery pipe a42 and the second cold energy recovery pipe B47 are used to input the refrigerant into the first cold storage tank 71 and the second cold storage tank 72, and the first cold energy recovery pipe a32 and the first cold energy recovery pipe B37 are used to output the refrigerant out of the first cold storage tank 71 and the second cold storage tank 72. In order to monitor the temperature of the output refrigerant, a refrigerant thermometer 35 is mounted on the refrigerant output pipe 34.
It will be appreciated that in other embodiments, the second cold energy recovery pipe a42 and the second cold energy recovery pipe B47 may also be used as the refrigerant output pipe, and the first cold energy recovery pipe a32 and the first cold energy recovery pipe B37 may be used as the refrigerant input pipe.
In normal operation of the present embodiment, the shut-off valve 21 is in a closed state, the first cold accumulation tank 71 and the second cold accumulation tank 72 are alternately used, the low-temperature liquid flows through the first cold accumulation tank 71 from the first fluid pipe section 22 first, the cold energy of the low-temperature liquid is absorbed by the water in the first cold accumulation tank 71 and then discharged, and enters the inner cavity of the vaporizer 10 through the second fluid pipe section 23 to be mixed with the steam discharged from the low-pressure steam pipe 11 to form mixed steam and then discharged through the emptying cylinder 14. In this process, the second inlet pipe shut-off valve 361 and the second outlet pipe shut-off valve 461 are in the closed state. In other embodiments, cryogenic gas may also be substituted for the cryogenic liquid.
After the water in the first cold storage tank 71 is condensed into ice, the first liquid inlet pipe shut-off valve 311 and the first liquid outlet pipe shut-off valve 411 are closed, so that the circulating water as the refrigerant enters the first cold storage tank 71 through the second cold recovery pipe a42, absorbs the heat of dissolution of the ice, becomes chilled water, and the chilled water is discharged through the first cold recovery pipe a32 and enters the precooling system. The second liquid inlet pipe cut-off valve 361 and the second liquid outlet pipe cut-off valve 461 are opened to allow the low-temperature liquid to flow through the second cold storage tank 72 while recovering the cold amount absorbed by the water by using the circulating water, so as to absorb the cold amount of the low-temperature liquid.
The temperature of the chilled water is monitored by the refrigerant thermometer 35, and when the temperature of the chilled water is higher than a set temperature, the corresponding valves of the first and second cold accumulation tanks 71 and 72 are switched to obtain proper chilled water.
When the low-temperature liquid and the circulating water entering the first cold accumulation tank are switched, firstly, an exhaust valve 717 and an exhaust valve 716 are opened to exhaust the chilled water in the first cold accumulation tank, then the exhaust valve is closed, and when the low-temperature fluid enters, the exhaust valve 716 is closed timely, so that the air sealed in the first cold accumulation tank is reduced, and the cold recovery efficiency is improved.
When the recovery device fails or the cold cannot be recovered continuously due to other reasons, the shut-off valve 21 is opened to enable the low-temperature liquid to directly enter the vaporizer 10, and the opening degree of the steam shut-off valve 12 is adjusted to ensure that the low-temperature liquid can be completely vaporized and discharged out of the emptying cylinder 14, so that the production safety is ensured.
In this embodiment, two cold accumulation tanks are provided for alternate use, and it can be understood that in other embodiments, 3 cold accumulation tanks, 4 cold accumulation tanks, or even more cold accumulation tanks may be provided, and during operation, the cold accumulation tanks may alternately absorb cold and discharge cold, or may be grouped into several groups to perform work of alternately absorbing cold and discharging cold.
As described above, although the present invention has been shown and described with reference to certain preferred embodiments, it is not to be construed as limiting the invention itself. Various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. The low-temperature cold energy recovery device is characterized by comprising a vaporizer, an emptying cylinder arranged at the top of the vaporizer and an energy recovery device connected to the vaporizer, wherein the vaporizer is provided with an inner cavity, and the emptying cylinder is communicated with the inner cavity of the vaporizer;
The vaporizer is connected with a low-pressure steam pipe and a low-temperature fluid pipe, and a cut-off valve is arranged on the low-temperature fluid pipe and divides the low-temperature fluid pipe into a first fluid pipe section and a second fluid pipe section; one end of the second fluid pipe section, which is away from the first fluid pipe section, extends into the inner cavity of the vaporizer and is formed into a cryogenic fluid outlet end; one end of the low-pressure steam pipe extends into the inner cavity of the carburetor;
The energy recovery device comprises at least two cold accumulation tanks, wherein each cold accumulation tank is provided with a tank inlet and a tank outlet, each tank inlet is connected with a low-temperature liquid inlet pipe and a first cold recovery pipe, and each tank outlet is connected with a low-temperature liquid outlet pipe and a second cold recovery pipe; each low-temperature liquid inlet pipe is communicated with a first fluid pipe section, and each low-temperature liquid outlet pipe is communicated with a second fluid pipe section;
a liquid outlet pipe cut-off valve is arranged on each low-temperature liquid outlet pipe, a liquid inlet pipe cut-off valve is arranged on each low-temperature liquid inlet pipe, a first cold quantity cut-off valve is arranged on each first cold quantity recovery pipe, and a second cold quantity cut-off valve is arranged on each second cold quantity recovery pipe;
When the low-temperature cold energy recovery device works, low-temperature fluid enters the cold accumulation tank through the first fluid pipe section and the tank inlet, enters the inner cavity of the vaporizer through the second fluid pipe section and the tank outlet, and is discharged from the emptying cylinder after being mixed with steam entering the vaporizer through the low-pressure steam pipe;
After a cold accumulation tank finishes cold accumulation, a liquid outlet pipe cut-off valve and a liquid inlet pipe cut-off valve of the cold accumulation tank are closed; the refrigerant enters the cold storage tank from one of the first cold energy recovery pipe and the second cold energy recovery pipe, is discharged out of the cold storage tank from the other of the first cold energy recovery pipe and the second cold energy recovery pipe, and recovers the cold energy absorbed by the cold storage tank.
2. The low-temperature cold energy recovery device according to claim 1, wherein the cold storage tank comprises a housing and a plurality of tubes arranged in the housing, a space between the tubes and the housing is formed as a cold storage chamber, and a cold storage agent is filled in the cold storage chamber;
one end of any one of the plurality of tubes is communicated with the tank inlet, and the other end of any one of the plurality of tubes is communicated with the tank outlet.
3. The low-temperature cold energy recovery device according to claim 2, wherein the cold storage agent is water or brine.
4. The low-temperature cold energy recovery device according to claim 2, wherein an expansion joint is provided on the housing corresponding to the cold accumulation chamber.
5. The low-temperature cold energy recovery device according to claim 2, wherein a tube plate is respectively arranged at two ends of the shell, and the plurality of tubes are hermetically arranged on the tube plate; the space outside the tube array between the two tube plates is formed into the cold accumulation cavity, the inner cavity of the shell outside the cold accumulation cavity is formed into a fluid area, the bottom of the shell is provided with an exhaust valve for exhausting the fluid area, and the top of the shell is provided with an exhaust valve for exhausting air in the fluid area.
6. The cryogenic cold energy recovery apparatus of claim 1, wherein a spray head is mounted on the cryogenic fluid outlet end; or an injection hole is arranged on the outlet end of the low-temperature fluid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910411947.4A CN110094632B (en) | 2019-05-17 | Low-temperature cold energy recovery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910411947.4A CN110094632B (en) | 2019-05-17 | Low-temperature cold energy recovery device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110094632A CN110094632A (en) | 2019-08-06 |
| CN110094632B true CN110094632B (en) | 2024-06-04 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201628446U (en) * | 2010-04-13 | 2010-11-10 | 济南鲍德气体有限公司 | Recovery system for cold energy released in vaporization of cryogenic liquid |
| CN106352654A (en) * | 2016-08-25 | 2017-01-25 | 广西大学 | Liquid nitrogen vaporization refrigeration recovery device |
| CN209991208U (en) * | 2019-05-17 | 2020-01-24 | 中国石油化工股份有限公司 | Low-temperature cold energy recovery device |
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201628446U (en) * | 2010-04-13 | 2010-11-10 | 济南鲍德气体有限公司 | Recovery system for cold energy released in vaporization of cryogenic liquid |
| CN106352654A (en) * | 2016-08-25 | 2017-01-25 | 广西大学 | Liquid nitrogen vaporization refrigeration recovery device |
| CN209991208U (en) * | 2019-05-17 | 2020-01-24 | 中国石油化工股份有限公司 | Low-temperature cold energy recovery device |
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