CN210107031U - Low temperature storage tank precooling system - Google Patents
Low temperature storage tank precooling system Download PDFInfo
- Publication number
- CN210107031U CN210107031U CN201920814984.5U CN201920814984U CN210107031U CN 210107031 U CN210107031 U CN 210107031U CN 201920814984 U CN201920814984 U CN 201920814984U CN 210107031 U CN210107031 U CN 210107031U
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- pipe
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- precooling
- storage tank
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Abstract
The utility model discloses a low temperature storage tank precooling system, including No. 1 low temperature storage tank, No. 2 low temperature storage tank, No. 3 low temperature storage tank, precooling house steward and gaseous phase exports the house steward, be equipped with precooling house steward valve on the precooling house steward, gaseous phase exports the house steward and is equipped with gaseous phase exports the house steward valve; the utility model has the advantages that: the method has the advantages of simple and convenient operation, high utilization rate of cold energy of the liquid-phase low-temperature medium, high precooling efficiency, high precooling cost, improvement of the efficiency of precooling a plurality of low-temperature storage tanks in the tank area simultaneously, saving of precooling time and great reduction of investment of owners to storage tank precooling.
Description
Technical Field
The utility model relates to a low temperature storage tank technical field, concretely relates to low temperature storage tank precooling system.
Background
More and more low-temperature storage tanks are applied to the energy and petrochemical industry, the low-temperature storage tanks are of double-layer structures, and glass bricks, expanded perlite and glass wool are used as heat-insulating and cold-insulating materials between an inner tank and an outer tank. After the storage tank construction and installation is completed, a liquid-phase low-temperature medium is needed to pre-cool the inner tank of the storage tank before the feeding operation, so that the inner tank can be uniformly shrunk from normal temperature to low temperature, and the risks of damage to the tank body caused by deformation and overlarge temperature difference stress due to nonuniform shrinkage of the storage tank are reduced. Because the volume of the existing low-temperature storage tank is large, the design pressure is low, the gas phase pressure is increased along with the vaporization of the liquid-phase low-temperature medium during precooling, the air exhaust is needed to avoid overpressure, and the cold energy in the storage tank is taken away while the air exhaust is carried out, so that the using amount of the liquid-phase low-temperature precooling medium required by precooling the storage tank is far higher than the calculated using amount.
SUMMERY OF THE UTILITY MODEL
In order to solve the above-mentioned not enough that exists on the prior art, the utility model provides a structural design is reasonable, use convenient operation is simple, a low temperature storage tank precooling system.
The technical scheme of the utility model as follows:
a low-temperature storage tank precooling system comprises a No. 1 low-temperature storage tank, a No. 2 low-temperature storage tank, a No. 3 low-temperature storage tank, a precooling main pipe and a gas-phase outgoing main pipe, wherein a precooling main pipe valve is arranged on the precooling main pipe, and a gas-phase outgoing main pipe valve is arranged on the gas-phase outgoing main pipe;
the pre-cooling header pipe is provided with a number 1 pre-cooling pipe, a number 2 pre-cooling pipe and a number 3 pre-cooling pipe respectively, the number 1 pre-cooling pipe, the number 2 pre-cooling pipe and the number 3 pre-cooling pipe are connected with a number 1 low-temperature storage tank, a number 2 low-temperature storage tank and a number 3 low-temperature storage tank respectively, and the number 1 pre-cooling pipe valve, the number 2 pre-cooling pipe valve and the number 3 pre-cooling pipe valve are arranged on the number 1 pre-cooling pipe, the number 2 pre-cooling pipe and the number 3 pre-cooling pipe respectively;
the gas phase external transportation main pipe is provided with a No. 1 gas phase external transportation pipe, a No. 2 gas phase external transportation pipe and a No. 3 gas phase external transportation pipe, the No. 1 gas phase external transportation pipe, the No. 2 gas phase external transportation pipe and the No. 3 gas phase external transportation pipe are respectively connected with a No. 1 low-temperature storage tank, a No. 2 low-temperature storage tank and a No. 3 low-temperature storage tank, and the No. 1 gas phase external transportation pipe, the No. 2 gas phase external transportation pipe and the No. 3 gas phase external transportation pipe are respectively provided with a No. 1 gas phase external transportation pipe valve, a No. 2 gas phase external transportation pipe valve and a No. 3 gas phase external;
the No. 1 low-temperature storage tank is provided with a No. 1 liquid inlet pipe, the No. 2 low-temperature storage tank is provided with a No. 2 liquid inlet pipe, the No. 3 low-temperature storage tank is provided with a No. 3 liquid inlet pipe, and the No. 1 liquid inlet pipe valve, the No. 2 liquid inlet pipe valve and the No. 3 liquid inlet pipe valve are respectively arranged on the No. 1 liquid inlet pipe, the No. 2 liquid inlet pipe and the No. 3 liquid inlet pipe;
the number 1 gas phase output pipe is provided with a number 1 cold air jumper pipe, the number 2 gas phase output pipe is provided with a number 2 cold air jumper pipe, the number 3 gas phase output pipe is provided with a number 3 cold air jumper pipe, and the number 1 cold air jumper pipe valve, the number 2 cold air jumper pipe valve and the number 3 cold air jumper pipe valve are respectively arranged on the number 1 cold air jumper pipe, the number 2 cold air jumper pipe valve and the number 3 cold air jumper pipe valve; the No. 1 cold air jumper tube, the No. 2 cold air jumper tube and the No. 3 cold air jumper tube are connected with the precooling main pipe, and a No. 1 precooling partition valve, a No. 2 precooling partition valve and a No. 3 precooling partition valve are respectively arranged on the precooling main pipe close to the joints of the No. 1 cold air jumper tube, the No. 2 cold air jumper tube and the No. 3 cold air jumper tube.
The low-temperature storage tank precooling system is characterized in that the No. 1 low-temperature storage tank, the No. 2 low-temperature storage tank and the No. 3 low-temperature storage tank are of double-layer structures, and cold insulation materials are filled between the inner layer and the outer layer for heat insulation, wherein the temperature is-196 ℃ to-20 ℃.
The low-temperature storage tank precooling system is characterized in that the precooling main pipe, the gas phase output main pipe, the No. 1 liquid inlet pipe, the No. 1 precooling pipe, the No. 1 gas phase output pipe, the No. 1 cold air jumper pipe, the No. 2 liquid inlet pipe, the No. 2 precooling pipe, the No. 2 cold air jumper pipe, the No. 3 liquid inlet pipe, the No. 3 precooling pipe, the No. 3 gas phase output pipe and the No. 3 cold air jumper pipe are all low-temperature steel pipes or low-temperature vacuum pipes, cold insulation heat insulation materials are adopted on the outer side of the low-temperature steel pipes for cold insulation, and the cold insulation heat insulation materials adopt PIR, PUR or foam glass bricks.
The low-temperature storage tank precooling system is characterized in that a precooling main pipe valve, a gas phase outward conveying main pipe valve, a liquid inlet pipe valve No. 1, a precooling pipe valve No. 1, a gas phase outward conveying pipe valve No. 1, a cold gas cross-over pipe valve No. 1, a precooling partition valve No. 2, a liquid inlet pipe valve No. 2, a cold gas cross-over pipe valve No. 2, a precooling partition valve No. 2, a liquid inlet pipe valve No. 3, a precooling pipe valve No. 3, a gas phase outward conveying pipe valve No. 3, a cold gas cross-over pipe valve No. 3 and a precooling partition valve No. 3 are all low-temperature valves or low-temperature vacuum valves, the low-temperature valves or the low-temperature vacuum valves adopt manual valves or regulating valves, cold insulation materials are adopted outside the low-temperature valve bodies to carry out cold insulation, and the cold insulation materials adopt PIR, PUR or foam glass bricks.
The utility model has the advantages that: the method has the advantages of simple and convenient operation, high utilization rate of cold energy of the liquid-phase low-temperature medium, high precooling efficiency, high precooling cost, improvement of the efficiency of precooling a plurality of low-temperature storage tanks in the tank area simultaneously, saving of precooling time and great reduction of investment of owners to storage tank precooling.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is a schematic diagram of the beginning of the pre-cooling process of the utility model;
fig. 3 is a schematic diagram of the completion of precooling of the No. 1 cryogenic storage tank of the utility model;
fig. 4 is a schematic diagram of the completion of precooling of the No. 2 cryogenic storage tank of the utility model;
fig. 5 is a schematic diagram of the completion of precooling of the No. 3 cryogenic storage tank of the utility model;
in the figure: 01-precooling header pipe, 02-precooling header pipe valve, 03-gas phase outward conveying header pipe, 04-gas phase outward conveying header pipe valve, No. 10-1 low-temperature storage tank, No. 11-1 liquid inlet pipe, No. 12-1 liquid inlet pipe valve, No. 13-1 precooling pipe, No. 14-1 precooling pipe valve, No. 15-1 gas phase outward conveying pipe, No. 16-1 gas phase outward conveying pipe valve, No. 17-1 cold gas jumper pipe, No. 18-1 cold gas jumper pipe valve, No. 19-1 precooling partition valve, No. 20-2 low-temperature storage tank, No. 21-2 liquid inlet pipe, No. 22-2 liquid inlet pipe valve, No. 23-2 precooling pipe, No. 24-2 precooling pipe valve, No. 25-2 gas phase outward conveying pipe, No. 26-2 gas phase outward conveying pipe valve, No. 27-2 cold gas jumper pipe, no. 28-2 cold air jumper valve, No. 29-2 precooling partition valve, No. 30-3 low-temperature storage tank, No. 31-3 liquid inlet pipe, No. 32-3 liquid inlet pipe valve, No. 33-3 precooling pipe, No. 34-3 precooling pipe valve, No. 35-3 gas phase output pipe, No. 36-3 gas phase output pipe valve, No. 37-3 cold air jumper pipe, No. 38-3 cold air jumper pipe valve, No. 39-3 precooling partition valve.
Detailed Description
The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.
Example (b):
as shown in fig. 1-5, the present embodiment is a low-temperature storage tank pre-cooling system, which includes a pre-cooling header pipe 01, a pre-cooling header pipe valve 02, a gas phase outgoing header pipe 03, a gas phase outgoing header pipe valve 04, a No. 1 low-temperature storage tank 10, a No. 1 liquid inlet pipe 11, a No. 1 liquid inlet pipe valve 12, a No. 1 pre-cooling pipe 13, a No. 1 pre-cooling pipe valve 14, a No. 1 gas phase outgoing pipe 15, a No. 1 gas phase outgoing pipe valve 16, a No. 1 cold gas cross-over pipe 17, a No. 1 cold gas cross-over pipe valve 18, a No. 1 pre-cooling partition valve 19, a No. 2 low-temperature storage tank 20, a No. 2 liquid inlet pipe 21, a No. 2 liquid inlet pipe valve 22, a No. 2 pre-cooling pipe 23, a No. 2 pre-cooling pipe valve 24, a No. 2 gas phase outgoing pipe 25, a No. 2 gas phase outgoing pipe valve 26, a No. 2 cold gas cross-, a No. 3 liquid inlet pipe valve 32, a No. 3 precooling pipe 33, a No. 3 precooling pipe valve 34, a No. 3 gas phase external conveying pipe 35, a No. 3 gas phase external conveying pipe valve 36, a No. 3 cold gas jumper pipe 37, a No. 3 cold gas jumper pipe valve 38 and a No. 3 precooling partition valve 39;
in this embodiment, the No. 1 low temperature storage tank, the No. 2 low temperature storage tank, the No. 3 low temperature storage tank are bilayer structure, and cold insulation material is filled between the inlayer and the skin and carries out adiabatic, and the temperature can be-196 ℃ to-20 ℃.
In this embodiment, the pre-cooling main pipe, the gas phase outgoing main pipe, the No. 1 liquid inlet pipe, the No. 1 pre-cooling pipe, the No. 1 gas phase outgoing pipe, the No. 1 cold gas cross-over pipe, the No. 2 liquid inlet pipe, the No. 2 pre-cooling pipe, the No. 2 cold gas cross-over pipe, the No. 3 liquid inlet pipe, the No. 3 pre-cooling pipe, the No. 3 gas phase outgoing pipe, and the No. 3 cold gas cross-over pipe are all low temperature steel pipes suitable for corresponding low temperature media, and the outer side of the steel pipes are kept cold by suitable cold insulation materials, such as PIR, PUR, foam glass bricks, and the like, or the low temperature pipes;
in this embodiment, the pre-cooling main pipe valve, the gas phase external transportation main pipe valve, the liquid inlet pipe valve No. 1, the pre-cooling pipe valve No. 1, the gas phase external transportation pipe valve No. 1, the cold gas cross-over pipe valve No. 1, the pre-cooling partition valve No. 1, the liquid inlet pipe valve No. 2, the pre-cooling pipe valve No. 2, the gas phase external transportation pipe valve No. 2, the cold gas cross-over pipe valve No. 2, the pre-cooling partition valve No. 2, the liquid inlet pipe valve No. 3, the pre-cooling pipe valve No. 3, the gas phase external transportation pipe valve No. 3, the cold gas cross-over pipe valve No. 3, the pre-cooling partition valve No. 3 are all valves suitable for corresponding low-temperature media, and can be manual valves or regulating valves, and the outside of the valve body of the valve is kept cold by using suitable cold insulation materials;
the method for precooling the low-temperature storage tank in the embodiment comprises the following steps of:
step 1: before precooling starts, keeping all valves closed, after precooling starts, opening a precooling main pipe valve, slowly opening a No. 1 precooling pipe valve, opening a No. 1 cold air cross-over valve when the pressure of a No. 1 low-temperature storage tank rises to 15kPa, opening a No. 2 precooling pipe valve, keeping the pressure of the No. 1 low-temperature storage tank stable, and stabilizing temperature drop, opening a No. 2 cold air partition valve when the pressure of a No. 2 low-temperature storage tank rises to 15kPa, opening a No. 3 precooling pipe valve, keeping the pressure of the No. 2 low-temperature storage tank stable, opening a No. 3 gas phase external conveying pipe valve, opening a gas phase external conveying main pipe valve, and keeping the pressure of the No. 3 storage tank stable;
step 2: when the temperature of the No. 1 storage tank is reduced to a temperature value required by precooling, a No. 1 low-temperature storage tank liquid inlet pipe valve is opened, after the liquid level of the storage tank is monitored, a No. 1 precooling partition valve, a No. 1 gas phase outward delivery pipe valve, a No. 1 precooling pipe valve is closed, a No. 1 cold air cross-over valve is adjusted, a No. 2 cold air cross-over valve and a No. 3 cold air cross-over valve are adjusted, the pressure of the No. 2 low-temperature storage tank is kept stable, the temperature drop is stable;
and step 3: when the temperature of the No. 2 storage tank is reduced to a temperature value required by precooling, opening a liquid inlet pipe valve of the No. 2 low-temperature storage tank, after monitoring the liquid level of the storage tank, opening a precooling partition valve of the No. 2, a gas phase external conveying pipe valve of the No. 2, closing the valve of the No. 2 precooling pipe, bridging the valve of the No. 2 cold gas, adjusting the valve of the No. 3 gas phase external conveying pipe, and keeping the pressure and the temperature drop of the No. 3 low-temperature;
and 4, step 4: and when the temperature of the No. 3 storage tank is reduced to the temperature value required by precooling, opening a liquid inlet pipe valve of the No. 3 low-temperature storage tank, and closing the valve of the No. 3 precooling pipe after the liquid level of the storage tank is monitored, so that precooling is finished.
Although the present invention has been described in terms of the above embodiments, it is not intended to limit the scope of the invention, and any person skilled in the art can make modifications and alterations without departing from the spirit and scope of the invention, such as increasing or decreasing the number of storage tanks.
Claims (4)
1. A low temperature storage tank precooling system which characterized in that: the system comprises a No. 1 low-temperature storage tank, a No. 2 low-temperature storage tank, a No. 3 low-temperature storage tank, a precooling main pipe and a gas-phase outward-conveying main pipe, wherein a precooling main pipe valve is arranged on the precooling main pipe, and a gas-phase outward-conveying main pipe valve is arranged on the gas-phase outward-conveying main pipe;
the pre-cooling header pipe is provided with a number 1 pre-cooling pipe, a number 2 pre-cooling pipe and a number 3 pre-cooling pipe respectively, the number 1 pre-cooling pipe, the number 2 pre-cooling pipe and the number 3 pre-cooling pipe are connected with a number 1 low-temperature storage tank, a number 2 low-temperature storage tank and a number 3 low-temperature storage tank respectively, and the number 1 pre-cooling pipe valve, the number 2 pre-cooling pipe valve and the number 3 pre-cooling pipe valve are arranged on the number 1 pre-cooling pipe, the number 2 pre-cooling pipe and the number 3 pre-cooling pipe respectively;
the gas phase external transportation main pipe is provided with a No. 1 gas phase external transportation pipe, a No. 2 gas phase external transportation pipe and a No. 3 gas phase external transportation pipe, the No. 1 gas phase external transportation pipe, the No. 2 gas phase external transportation pipe and the No. 3 gas phase external transportation pipe are respectively connected with a No. 1 low-temperature storage tank, a No. 2 low-temperature storage tank and a No. 3 low-temperature storage tank, and the No. 1 gas phase external transportation pipe, the No. 2 gas phase external transportation pipe and the No. 3 gas phase external transportation pipe are respectively provided with a No. 1 gas phase external transportation pipe valve, a No. 2 gas phase external transportation pipe valve and a No. 3 gas phase external;
the No. 1 low-temperature storage tank is provided with a No. 1 liquid inlet pipe, the No. 2 low-temperature storage tank is provided with a No. 2 liquid inlet pipe, the No. 3 low-temperature storage tank is provided with a No. 3 liquid inlet pipe, and the No. 1 liquid inlet pipe valve, the No. 2 liquid inlet pipe valve and the No. 3 liquid inlet pipe valve are respectively arranged on the No. 1 liquid inlet pipe, the No. 2 liquid inlet pipe and the No. 3 liquid inlet pipe;
the number 1 gas phase output pipe is provided with a number 1 cold air jumper pipe, the number 2 gas phase output pipe is provided with a number 2 cold air jumper pipe, the number 3 gas phase output pipe is provided with a number 3 cold air jumper pipe, and the number 1 cold air jumper pipe valve, the number 2 cold air jumper pipe valve and the number 3 cold air jumper pipe valve are respectively arranged on the number 1 cold air jumper pipe, the number 2 cold air jumper pipe valve and the number 3 cold air jumper pipe valve; the No. 1 cold air jumper tube, the No. 2 cold air jumper tube and the No. 3 cold air jumper tube are connected with the precooling main pipe, and a No. 1 precooling partition valve, a No. 2 precooling partition valve and a No. 3 precooling partition valve are respectively arranged on the precooling main pipe close to the joints of the No. 1 cold air jumper tube, the No. 2 cold air jumper tube and the No. 3 cold air jumper tube.
2. The cryogenic storage tank precooling system of claim 1, wherein the cryogenic storage tank No. 1, the cryogenic storage tank No. 2 and the cryogenic storage tank No. 3 are all of a double-layer structure, and a cold insulation material is filled between an inner layer and an outer layer for heat insulation, and the temperature is from-196 ℃ to-20 ℃.
3. The system of claim 1, wherein the pre-cooling main pipe, the gas phase outgoing main pipe, the liquid inlet pipe No. 1, the pre-cooling pipe No. 1, the gas phase outgoing pipe No. 1, the cold gas jumper pipe No. 1, the liquid inlet pipe No. 2, the pre-cooling pipe No. 2, the gas phase outgoing pipe No. 2, the cold gas jumper pipe No. 2, the liquid inlet pipe No. 3, the pre-cooling pipe No. 3, the gas phase outgoing pipe No. 3, and the cold gas jumper pipe No. 3 are all low-temperature steel pipes or low-temperature vacuum pipes, and the outer side of each low-temperature steel pipe is kept cold by using a cold insulation material, and the cold insulation material is PIR, PUR or foam glass bricks.
4. The cryogenic storage tank precooling system according to claim 1, wherein the precooling main pipe valve, the gas phase outward transport main pipe valve, the liquid inlet pipe valve No. 1, the precooling pipe valve No. 1, the gas phase outward transport pipe valve No. 1, the cold gas jumper valve No. 1, the precooling partition valve No. 1, the liquid inlet pipe valve No. 2, the precooling pipe valve No. 2, the gas phase outward transport pipe valve No. 2, the cold gas jumper valve No. 2, the precooling partition valve No. 3, the liquid inlet pipe valve No. 3, the gas phase outward transport pipe valve No. 3, the cold gas jumper valve No. 3 and the precooling partition valve No. 3 are all cryogenic valves or cryogenic vacuum valves, the low-temperature valve or the low-temperature vacuum valve is a manual valve or a regulating valve, the outer side of the valve body of the low-temperature valve is kept cold by adopting a cold insulation heat-insulating material, and the cold insulation heat-insulating material adopts PIR, PUR or foam glass brick.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920814984.5U CN210107031U (en) | 2019-05-31 | 2019-05-31 | Low temperature storage tank precooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920814984.5U CN210107031U (en) | 2019-05-31 | 2019-05-31 | Low temperature storage tank precooling system |
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| Publication Number | Publication Date |
|---|---|
| CN210107031U true CN210107031U (en) | 2020-02-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920814984.5U Withdrawn - After Issue CN210107031U (en) | 2019-05-31 | 2019-05-31 | Low temperature storage tank precooling system |
Country Status (1)
| Country | Link |
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| CN (1) | CN210107031U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110145684A (en) * | 2019-05-31 | 2019-08-20 | 中国空分工程有限公司 | A kind of low-temperature storage tank chilldown system and forecooling method |
-
2019
- 2019-05-31 CN CN201920814984.5U patent/CN210107031U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110145684A (en) * | 2019-05-31 | 2019-08-20 | 中国空分工程有限公司 | A kind of low-temperature storage tank chilldown system and forecooling method |
| CN110145684B (en) * | 2019-05-31 | 2023-08-29 | 中国空分工程有限公司 | Precooling system and precooling method for low-temperature storage tank |
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