CN215000974U - Be used for pressure release system before cryogenic liquids tank wagon fills dress - Google Patents
Be used for pressure release system before cryogenic liquids tank wagon fills dress Download PDFInfo
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- CN215000974U CN215000974U CN202120853449.8U CN202120853449U CN215000974U CN 215000974 U CN215000974 U CN 215000974U CN 202120853449 U CN202120853449 U CN 202120853449U CN 215000974 U CN215000974 U CN 215000974U
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Abstract
The utility model discloses a pressure relief system before filling for cryogenic liquids tank wagon, including mixed gas pipeline (10), pressure release pipeline (20) and water cooling tower (5), pressure release pipeline (20) can set up many, its one end with liquid tank wagon (11) intercommunication, the other end with mixed gas pipeline (10) intercommunication, it is equipped with first feed liquor valve (12), ball valve (15), first manometer (16) on the spot, relief valve (17), check valve (18) and second manometer (19) on the spot to communicate in proper order on pressure release pipeline (20), first feed liquor valve (12) are located pressure release pipeline (20) with liquid tank wagon (11) intercommunication end; one end of the mixed gas pipeline (10) is communicated with the air separation cold box, and the other end of the mixed gas pipeline is communicated with the water cooling tower (5), so that the problem that the cold quantity of the residual high-pressure gas of the liquid tank car and the gas discharged from the air separation cold box are difficult to recycle at the same time is solved.
Description
Technical Field
The utility model relates to a cryogenic liquids transports technical field, more specifically relates to a pressure release system before filling dress for cryogenic liquids tank wagon.
Background
The air separation device is a series of industrial equipment used for separating each component gas in the air, including refrigeration equipment and cryogenic liquid conveying equipment, etc., the liquid products produced by the air separation device, such as liquid oxygen, liquid nitrogen and liquid argon, are conveyed by pipelines to enter corresponding liquid storage tanks for storage, and are sold and transported by liquid tank cars, after the liquid tank cars are unloaded, a small amount of liquid often remains, the residual liquid will be gradually gasified into cryogenic gas due to the rise of temperature and the change of pressure in the tank cars, so as to form higher tank car internal pressure, if the tank cars are not decompressed and discharged before being filled, then when the subsequent tank cars are prepared to be filled, impure gas and liquid in the tank cars can enter the liquid storage tanks in the precooling and filling pump process, so that the liquid products are polluted; in addition, when the filling pump is started to fill the tank car, the back pressure of the filling pump is high, so that the outlet safety valve jumps, and the filling pump is easy to lose the quantity due to cavitation.
The prior art has the following disadvantages: (1) the air separation cold box can generate a part of dirty nitrogen and low-pressure nitrogen in the working process, the gas and the liquid tank car pressure relief gas have cold quantity and have recycling value, but the gas in the air separation cold box and the gas in the liquid tank car can not be recycled by using the same set of recycling system; (2) the liquid tank car can transport various low-temperature liquids, the same pressure relief device cannot be used for pressure relief and cold energy recovery when pressure relief is carried out, and the cost is high when a plurality of special pressure relief devices are arranged; (3) at present, some air separation plants are not designed and provided with devices specially used for pressure relief of liquid tank cars before filling, so that the liquid tank cars have to be emptied in place, which not only causes environmental protection events, but also has great potential safety hazards and wastes cold energy.
SUMMERY OF THE UTILITY MODEL
To prior art's above defect or improvement demand, the utility model provides a pressure release system before being used for cryogenic liquids tank wagon to fill dress, adopt pressure release pipeline and mixed gas pipeline, communicate liquid tank wagon and empty cold box that divides respectively, the gas that both produced converges and enters into the water cooling tower behind the mixed gas pipeline and carries out cold volume recovery and gaseous emission, cause the influence to converging mixed gas pipeline for the high-pressure gas that prevents liquid tank wagon gaseous phase portion, it is equipped with the ball valve to communicate on last time at pressure release pipeline, first manometer on the spot, the relief valve, check valve and second manometer on the spot, the remaining oxygen of liquid tank wagon has been solved, nitrogen gas, the argon gas is difficult to recycle its cold volume's problem simultaneously with empty cold box combustion gas that divides.
In order to realize above-mentioned purpose, the utility model provides a pressure relief system before filling dress for cryogenic liquids tank wagon, including liquid tank wagon and empty cold box that divides, and locate the first feed liquor valve and the second feed liquor valve of liquid tank wagon and intercommunication with it, its characterized in that still includes:
a mixed gas pipeline, a pressure relief pipeline and a water cooling tower;
one or more pressure relief pipelines are arranged, one end of each pressure relief pipeline is communicated with the liquid tank car, the other end of each pressure relief pipeline is communicated with the mixed gas pipeline, each pressure relief pipeline is sequentially communicated with a ball valve, a first on-site pressure gauge, a safety valve, a check valve and a second on-site pressure gauge, and the ball valves are arranged between the liquid tank car and the first on-site pressure gauges;
and one end of the mixed gas pipeline is communicated with the air separation cold box, and the other end of the mixed gas pipeline is communicated with the water cooling tower.
Further, the pressure relief pipeline comprises a joint of the liquid tank truck and the pressure relief pipeline;
one end of the joint of the liquid tank car and the pressure relief pipeline is respectively communicated with the first liquid inlet valve and the second liquid inlet valve, and the other end of the joint is communicated with the pressure relief pipeline.
Further, the mixed gas pipeline includes empty low pressure nitrogen gas import and dirty nitrogen gas import of dividing, empty low pressure nitrogen gas import with dirty nitrogen gas import one end respectively with empty cold box intercommunication of dividing, the other end with mixed gas pipeline intercommunication.
Further, the mixed gas pipeline includes low pressure nitrogen gas governing valve and dirty nitrogen gas governing valve, low pressure nitrogen gas governing valve one end with mixed gas pipeline intercommunication, the other end respectively with empty cold box intercommunication that divides.
Further, the water cooling tower includes circulating water import and circulating water export, and both communicate each other, all fixed mounting in the water cooling tower, the circulating water import is higher than the setting of circulating water export.
Furthermore, the water cooling tower comprises a gas inlet and a gas outlet, both of which are fixedly arranged on the water cooling tower, the gas outlet is higher than the gas inlet, one end of the gas inlet is communicated with the mixed gas pipeline, the other end of the gas inlet is communicated with the water cooling tower, and the gas outlet is communicated with the water cooling tower.
Generally, through the utility model discloses above technical scheme who conceives compares with prior art, can gain following beneficial effect:
1. the utility model provides a pressure release system before filling dress for cryogenic liquids tank wagon, adopt pressure release pipeline and mixed gas pipeline, communicate liquid tank wagon and empty cold box that divides respectively, the gaseous income water cooling tower that produces both carries out cold volume recovery and gaseous emission after converging mixed gas pipeline, cause the influence to converging mixed gas pipeline for the high-pressure gas that prevents liquid tank wagon gaseous phase portion, it is equipped with the ball valve to communicate on the pressure release pipeline once, first manometer on the spot, the relief valve, check valve and second manometer on the spot, the remaining oxygen of liquid tank wagon has been solved, nitrogen gas, argon gas is difficult to recycle its cold volume's problem simultaneously with empty cold box exhaust gas that divides.
2. The utility model provides a pressure release system before filling dress for cryogenic liquids tank wagon adopts the water cooling tower to lead in with the higher circulating water of temperature, and the gas inlet on the water cooling tower is discharged low pressure nitrogen gas, dirty nitrogen gas, liquid tank wagon high-pressure gas are leading-in from water cooling tower top portion simultaneously, prevents to form the problem of local oxygen boosting environment or oxygen deficiency environment, has avoided environmental pollution and personnel to receive the risk of injury, has played the cold volume recycle's in the pressure release gas function.
Drawings
Fig. 1 is the embodiment of the utility model provides a pressure relief system's before filling structure sketch map for cryogenic liquids tank wagon.
In all the figures, the same reference numerals denote the same features, in particular: 1-circulating water inlet, 2-circulating water outlet, 3-gas inlet, 4-gas outlet, 5-water cooling tower, 6-air separation low-pressure nitrogen inlet, 7-low-pressure nitrogen regulating valve, 8-dirty nitrogen inlet, 9-dirty nitrogen regulating valve, 10-mixed gas pipeline, 11-liquid tank car, 12-first liquid inlet valve, 13-second liquid inlet valve, 14-liquid tank car and pressure relief pipeline junction, 15-ball valve, 16-first in-situ pressure gauge, 17-safety valve, 18-check valve, 19-second in-situ pressure gauge and 20-pressure relief pipeline.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
As shown in fig. 1, the utility model provides a pressure relief system before filling for cryogenic liquid tank wagon, it includes water cooling tower 5, mixed gas pipeline 10 and pressure relief pipeline 20, mixed gas pipeline 10 one end is through empty cold box that divides separately intercommunication empty through empty low pressure nitrogen gas import 6 and dirty nitrogen gas import 8 of dividing, can let in low pressure nitrogen gas and dirty nitrogen gas, low pressure nitrogen gas import 6 and dirty nitrogen gas import 8 respectively with low pressure nitrogen gas governing valve 7 and dirty nitrogen gas governing valve 9 intercommunication, further, pressure relief pipeline 20 one end and liquid tank wagon 11 intercommunication, the other end and mixed gas pipeline 10 intercommunication, can transport liquid oxygen, liquid nitrogen or liquid argon in the liquid tank wagon 11, and the inside gaseous portion that is located the top that is divided into of liquid tank wagon 11 and the liquid phase portion that is located the bottom, gas and liquid are stored respectively, pressure relief pipeline 20 is used for leading into the cryogenic gas that the liquid formed because of not discharging in the liquid tank wagon 11 in mixed gas pipeline 10, preferably, the mixed gas pipeline 10 can be made of low-temperature-resistant pipe materials to prolong the service life of the pipeline, the low-pressure nitrogen, the dirty nitrogen and the low-temperature gas finally form mixed gas, and is connected into the water cooling tower 5 through the mixed gas pipeline 10, a water circulation is arranged in the water cooling tower 5, the mixed gas enters the water cooling tower 5 and then generates heat exchange with the water circulation to take away the heat of water, and finally the mixed gas is discharged into the atmosphere from the top of the water cooling tower 5 without threatening staff, and the cold energy in the mixed gas is recovered by the water cooling tower 5, thereby reducing the energy waste, a plurality of pressure relief pipelines 20 can be arranged and respectively arranged at the storage tanks of various liquids, the tank car capable of supplying liquid oxygen, the liquid nitrogen and the liquid argon simultaneously relives pressure, or the tank car filled with the same product simultaneously relives pressure, so that the filling efficiency is improved.
Further, as shown in fig. 1, the pressure relief pipeline 20 sequentially comprises a liquid tank car and pressure relief pipeline joint 14, a ball valve 15, a first in-situ pressure gauge 16, a safety valve 17, a check valve 18 and a second in-situ pressure gauge 19, the liquid tank car and pressure relief pipeline joint 14 is disposed near one end of the liquid tank car 11, the pressure relief pipeline 20 is made of low temperature resistant pipe material and can resist high pressure gas formed by liquid oxygen, liquid nitrogen or liquid argon, preferably, the liquid tank car and pressure relief pipeline joint 14 is a metal hose, both ends of the liquid tank car and pressure relief pipeline joint are provided with a claw joint, the metal hose is used to communicate the pressure relief pipeline 20 with the liquid tank car 11 more conveniently and quickly, further, the liquid tank car and pressure relief pipeline joint 14 is communicated with the liquid tank car 11 through a first liquid inlet valve 12 and a second liquid inlet valve 13 respectively, the first liquid inlet valve 12 is communicated with the gas phase part, the second liquid inlet valve 13 is communicated with the liquid phase part for respectively controlling the inflow of gas and liquid in the liquid tank wagon 11, and the pressure relief pipeline 20 and the matching communicating components can be provided with a plurality of groups, when the liquid tank wagon 11 is filled with unevaporated liquid or insufficient liquid, the gas phase part is communicated with the pressure relief pipeline 20 by opening the first liquid inlet valve 12 and closing the second liquid inlet valve 13 when the liquid tank wagon is communicated with the pressure relief pipeline 20 through the junction 14 of the liquid tank wagon and the pressure relief pipeline, so that the gas phase part is prevented from being communicated with the pressure relief pipeline 20, the liquid is prevented from entering the pressure relief pipeline 20 and being easily gasified rapidly by the influence of the ambient temperature, and causing overpressure, the liquid tank wagon 11 with a part of liquid products inside can be prevented from being lost and wasted, and the ball valve 15 is used for controlling the on-off of the pressure relief pipeline 20, the first in-situ pressure gauge 16 is used for detecting the pressure in the pressure relief pipeline 20, the mixed gas pipeline 10 is used for conveying cold box dirty nitrogen and low-pressure nitrogen, so the pressure bearing capacity of the mixed gas pipeline 10 is small, the general pressure of the gas phase part in the liquid tanker 11 is large, the first in-situ pressure gauge 16 is matched with the safety valve 17 to prevent and control the overpressure in the pressure relief pipeline 20 so as to prevent the high-pressure gas in the gas phase part from directly entering the mixed gas pipeline 10, preferably, the ball valve 15 and the safety valve 17 both adopt oxygen valves, the risk of explosion easily generated when pure oxygen is conveyed and contacted is reduced, the safety of the pressure relief system is ensured, further, the check valve 18 is used for preventing the cold box dirty nitrogen and the low-pressure nitrogen in the mixed gas pipeline 10 from flowing back into the pressure relief pipeline 20 to cause leakage and cause personal injury, and the second in-situ pressure gauge 19 is used for preventing the residual gas pressure of the gas phase part after being controlled by the safety valve 17 from generating pressure Too high, avoid it to influence the transport of dirty nitrogen gas and low pressure nitrogen gas, thus avoid causing the influence to other parts in the pressure relief system, first local manometer 16 and second local manometer 19 all choose the manometer of forbidding oil oxygen to use, prevent to contact the explosion under the condition of pure oxygen, in order to improve the safety performance of the pipeline, finally the pressure release pipeline 20 with mix the gas pipeline 10 intercommunication, the gas in both inside leads into together in the water cooling tower 5, this pressure relief system adopts the mode that mix the gas pipeline 10 and the pressure release pipeline 20 communicate, can collect the high pressure gas in the liquid tank wagon 11 gas phase portion when collecting the low pressure nitrogen gas and the dirty nitrogen gas that the air separation cold box produced, be equipped with ball valve 15, first local manometer 16, relief valve 17, check valve 18 and second local manometer 19 on the pressure release pipeline 20 simultaneously for carrying out the depressurization treatment to the high pressure gas in the gas phase portion, prevent that it from directly letting in mix the gas pipeline 10 and causing the risk, still prevented empty low pressure nitrogen gas that the cold box produced of separating and dirty nitrogen refluence and got into in the pressure relief pipeline 20.
Further, as shown in fig. 1, the water cooling tower 5 includes a circulating water inlet 1, a circulating water outlet 2, a gas inlet 3 and a gas outlet 4, the circulating water inlet 1 is used for introducing circulating water with a higher temperature, which can be obtained by absorbing heat with cooling circulating water in industrial production, the circulating water inlet 1 is communicated with the circulating water outlet 2, the circulating water with a higher temperature flows to the bottom through the water cooling tower 5 and is discharged from the circulating water outlet 2, when an air-separation cold box generates low-pressure nitrogen and waste nitrogen, and a liquid tank car 11 needs to decompress the gas phase part, mixed gas generated by the two is communicated with the gas inlet 3 through a mixed gas pipeline 10, the gas inlet 3 is arranged at the bottom of the water cooling tower 5, the gas inlet 3 is communicated with the gas outlet 4 at the top of the water cooling tower 5, so that the mixed gas is finally discharged into the atmosphere from the bottom of the water cooling tower 5 upwards, because the circulating water with higher temperature also flows through the water cooling tower 5, the mixed gas exchanges heat with the circulating water with higher temperature, so that the cold quantity of the mixed gas is transferred to the circulating water with higher temperature to achieve the function of energy recovery, preferably, the circulating water outlet 2 is arranged lower than the circulating water inlet 1 to form a flow direction from high to low, and form convection with the guiding of the mixed gas, so as to improve the energy exchange efficiency, finally, the circulating water with higher temperature is gradually cooled and flows out from the circulating water outlet 2, and the mixed gas is guided to a position far away from the ground by the water cooling tower 5 and is discharged into the atmosphere, so that the risk of suffocation to ground workers is prevented.
It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included within the scope of the present invention.
Claims (6)
1. The utility model provides a pressure relief system before filling for cryogenic liquid tank wagon, includes liquid tank wagon (11) and the empty cold box that divides, and locates liquid tank wagon (11) and first feed liquor valve (12) and second feed liquor valve (13) that communicate with it, its characterized in that still includes:
a mixed gas pipeline (10), a pressure relief pipeline (20) and a water cooling tower (5);
one or more pressure relief pipelines (20) are arranged, one end of each pressure relief pipeline is communicated with the liquid tank wagon (11), the other end of each pressure relief pipeline is communicated with the mixed gas pipeline (10), each pressure relief pipeline (20) is sequentially communicated with a ball valve (15), a first on-site pressure gauge (16), a safety valve (17), a check valve (18) and a second on-site pressure gauge (19), and each ball valve (15) is arranged between the liquid tank wagon (11) and the first on-site pressure gauge (16);
one end of the mixed gas pipeline (10) is communicated with the air separation cold box, and the other end of the mixed gas pipeline is communicated with the water cooling tower (5).
2. A pre-charge pressure relief system for a cryogenic liquid tank car according to claim 1, wherein the pressure relief line (20) comprises a liquid tank car to pressure relief line junction (14);
one end of a joint (14) of the liquid tank car and the pressure relief pipeline is respectively communicated with the first liquid inlet valve (12) and the second liquid inlet valve (13), and the other end of the joint is communicated with the pressure relief pipeline (14).
3. The pre-filling pressure relief system for a cryogenic liquid tanker according to claim 1, wherein the mixed gas line (10) comprises an air-separated low-pressure nitrogen inlet (6) and a dirty nitrogen inlet (8), one end of the air-separated low-pressure nitrogen inlet (6) and one end of the dirty nitrogen inlet (8) are respectively communicated with the air-separated cold box, and the other end of the air-separated low-pressure nitrogen inlet is communicated with the mixed gas line (20).
4. The pre-filling pressure relief system for a cryogenic liquid tanker according to claim 3, wherein the mixed gas line (10) comprises a low pressure nitrogen regulating valve (7) and a waste nitrogen regulating valve (9), one end of the low pressure nitrogen regulating valve (7) is communicated with the mixed gas line (10), and the other end is communicated with the air separation cold box respectively.
5. The pre-charging pressure relief system for a cryogenic liquid tanker according to claim 1, wherein the water cooling tower (5) comprises a circulating water inlet (1) and a circulating water outlet (2), both of which are communicated with each other and fixedly mounted on the water cooling tower (5), and the circulating water inlet (1) is arranged higher than the circulating water outlet (2).
6. The pre-charging pressure relief system for a cryogenic liquid tanker according to claim 1, wherein the water cooling tower (5) comprises a gas inlet (3) and a gas outlet (4), both of which are fixedly mounted to the water cooling tower (5), the gas outlet (4) is arranged higher than the gas inlet (3), one end of the gas inlet (3) is communicated with the mixed gas pipeline (10), the other end of the gas inlet is communicated with the water cooling tower (5), and the gas outlet (4) is communicated with the water cooling tower (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120853449.8U CN215000974U (en) | 2021-04-23 | 2021-04-23 | Be used for pressure release system before cryogenic liquids tank wagon fills dress |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120853449.8U CN215000974U (en) | 2021-04-23 | 2021-04-23 | Be used for pressure release system before cryogenic liquids tank wagon fills dress |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215000974U true CN215000974U (en) | 2021-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120853449.8U Active CN215000974U (en) | 2021-04-23 | 2021-04-23 | Be used for pressure release system before cryogenic liquids tank wagon fills dress |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215000974U (en) |
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2021
- 2021-04-23 CN CN202120853449.8U patent/CN215000974U/en active Active
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