CN217714544U - Driving system of low-temperature storage tank - Google Patents
Driving system of low-temperature storage tank Download PDFInfo
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- CN217714544U CN217714544U CN202221880484.XU CN202221880484U CN217714544U CN 217714544 U CN217714544 U CN 217714544U CN 202221880484 U CN202221880484 U CN 202221880484U CN 217714544 U CN217714544 U CN 217714544U
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- low
- storage tank
- temperature storage
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- replacement
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- 238000003860 storage Methods 0.000 title claims abstract description 118
- 239000007791 liquid phase Substances 0.000 claims abstract description 31
- 238000002485 combustion reaction Methods 0.000 claims abstract description 16
- 239000002912 waste gas Substances 0.000 claims abstract description 16
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 claims description 82
- 239000007789 gas Substances 0.000 claims description 78
- 239000001294 propane Substances 0.000 claims description 41
- 239000012071 phase Substances 0.000 claims description 15
- 238000004891 communication Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 7
- WWYNJERNGUHSAO-XUDSTZEESA-N (+)-Norgestrel Chemical compound O=C1CC[C@@H]2[C@H]3CC[C@](CC)([C@](CC4)(O)C#C)[C@@H]4[C@@H]3CCC2=C1 WWYNJERNGUHSAO-XUDSTZEESA-N 0.000 claims description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 4
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical group CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 claims description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 4
- 239000005977 Ethylene Substances 0.000 claims description 4
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims description 4
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims description 4
- 239000002699 waste material Substances 0.000 abstract description 2
- 239000007792 gaseous phase Substances 0.000 abstract 3
- 239000003595 mist Substances 0.000 abstract 2
- 238000006073 displacement reaction Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 239000003317 industrial substance Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The utility model provides a system of driving of low temperature basin, this system of driving can reduce the waste of low temperature medium, satisfies energy saving and emission reduction requirement. The starting system of the low-temperature storage tank comprises a plurality of low-temperature storage tanks, and a medium unloading system, a low-temperature medium unloading system and a waste gas combustion unit which are respectively connected with the low-temperature storage tanks; each low temperature basin all is equipped with puts scavenge port, gaseous phase mouth and liquid phase mouth, the replacement gaseous phase mouth is the connecting medium system of unloading respectively, waste gas combustion unit is connected respectively to the gaseous phase mouth, the liquid phase mouth is by public ship unloading pipe connection low temperature medium system of unloading respectively, and a plurality of low temperature basin makes up respectively into a plurality of two-stage replacement structure, and every two-stage replacement structure includes a preceding stage low temperature basin and one to three back level low temperature basin, and each back level low temperature basin is connected with preceding stage low temperature basin respectively, and the mist that preceding stage low temperature basin replaced is discharged into each back level low temperature basin, and the mist that replaces through back level low temperature basin again discharges to waste gas combustion unit.
Description
The technical field is as follows:
the utility model relates to a system of driving of low temperature basin is applicable to the storage of industrial chemicals such as ethane, ethylene, propane, propylene, LNG or liquid ammonia.
The background art comprises the following steps:
at present, a plurality of low-temperature storage tanks with the same materials are generally constructed and put into use in a large low-temperature tank area, and during the starting process of a low-temperature propane storage tank device, a low-temperature propane storage tank system needs to be replaced by pure propane in the shortest time, namely the volume concentration of propane reaches 95%, and then subsequent low-temperature propane storage tank precooling, low-temperature propane liquid level establishment and other work are carried out.
And in the early stage of replacing nitrogen in the low-temperature propane storage tank by propane, mixed gas which does not reach 95% of propane volume concentration is discharged to a torch system as waste gas to be incinerated. Therefore, in the working step of solid gas replacement of the existing low-temperature propane storage tank, a large amount of propane gas needs to be incinerated, for example, 200-300 tons of propane gas need to be incinerated every day for the low-temperature storage tank with 8 ten thousand cubic meters, so that the driving cost is increased, certain pollution exists, and the pressure of environmental protection is increased.
The invention content is as follows:
in order to solve the above problems, the utility model provides a system of driving of low temperature basin, this system of driving can
So as to reduce the waste of low-temperature medium and meet the requirements of energy conservation and emission reduction.
The utility model discloses a concrete technical scheme as follows:
a low-temperature storage tank start-up system comprises a plurality of low-temperature storage tanks, and a medium unloading system, a low-temperature medium unloading system and a waste gas combustion unit which are respectively connected with the low-temperature storage tanks; each low-temperature storage tank is provided with a gas replacement port, a gas phase port and a liquid phase port, the gas replacement ports are respectively connected with a medium unloading system, the gas phase ports are respectively connected with a waste gas combustion unit, the liquid phase ports are respectively connected with the low-temperature medium unloading system through a public ship unloading pipeline, a plurality of low-temperature storage tanks are respectively combined into a plurality of two-stage replacement structures, each two-stage replacement structure comprises a front-stage low-temperature storage tank and one to three rear-stage low-temperature storage tanks, each rear-stage low-temperature storage tank is respectively connected with the front-stage low-temperature storage tank, mixed gas replaced by the front-stage low-temperature storage tank is discharged into each rear-stage low-temperature storage tank, and the mixed gas replaced by the rear-stage low-temperature storage tanks is discharged to the waste gas combustion unit.
Furthermore, in each two-stage replacement structure, a liquid phase port of the rear-stage low-temperature storage tank and a pipeline section of a replacement gas port of the rear-stage low-temperature storage tank are provided with a communication pipeline, mixed gas discharged by the front-stage low-temperature storage tank is discharged into a common ship unloading pipeline through the liquid phase port, the mixed gas is conveyed to the pipeline section of the liquid phase port of the rear-stage low-temperature storage tank through the common ship unloading pipeline, and then the mixed gas is connected to the replacement gas port of the rear-stage low-temperature storage tank through the communication pipeline and enters the storage tank for secondary replacement.
Furthermore, in each two-stage replacement structure, a gas phase port of the preceding-stage low-temperature storage tank is respectively connected with a replacement gas port of the subsequent-stage low-temperature storage tank, and the mixed gas discharged from the gas phase port of the preceding-stage low-temperature storage tank is sent into the storage tank through the replacement gas port of the subsequent-stage low-temperature storage tank for secondary replacement.
Furthermore, the medium unloading system is also provided with a heating device, and the medium output by the unloading system is heated into a gaseous medium by the heating device and then is sent into the two-stage replacement structure.
Further, the medium unloading system and the low-temperature medium unloading system adopt the same medium, and the medium is ethane, ethylene, propane, propylene, LNG or liquid ammonia.
The utility model discloses compare and have following beneficial effect in prior art:
1. the utility model discloses a low temperature basin system of driving designs into the two-stage replacement structure with the low temperature basin, and the backing stage is discharged the gas mixture of replacement and is used for the replacement of back level second grade, reduces propane gas's emission, reduces the environmental pollution risk.
2. The utility model discloses in adopt one to three low temperature basin as the back level, reasonable in design has saved the consumption of gaseous medium, reduces greenhouse gas's emission, reduces the cost of driving.
Drawings
Fig. 1 is a schematic structural view of the present invention;
in the figure: 1-a pre-stage cryogenic tank; 2-a rear-stage low-temperature storage tank; 3-a cryogenic medium unloading system; 4-a media unloading system; 5-arranging a ventilation port; 6-gas phase port; 7-liquid phase port; 8-a waste gas combustion unit; 9-common ship unloading pipeline; 10-a heating device; 11-a communication line.
Detailed Description
The first embodiment is as follows:
as shown in figure 1, the utility model discloses a low temperature basin system of driving includes a plurality of low temperature basin, medium system of unloading, low temperature medium system of unloading and waste gas combustion unit, and each low temperature basin is connected with medium system of unloading, low temperature medium system of unloading and waste gas combustion unit respectively. Each low-temperature storage tank is provided with a gas exchange port 5, a gas phase port 6, a liquid phase port 7 and other reserved ports. The replacement gas ports 5 of the low-temperature storage tank are respectively connected with the medium unloading system 4, the gas ports are respectively connected with the waste gas combustion unit 8, and the liquid ports 7 are respectively connected with the low-temperature medium unloading system 3 through a common unloading pipeline 9. The medium unloading system 4 is provided with a heating device, and the medium output by the unloading system 4 is heated into a gaseous state by the heating device and sent into the low-temperature storage tank.
In the embodiment, a plurality of low-temperature storage tanks are respectively combined into a plurality of two-stage replacement structures, each two-stage replacement structure comprises a front-stage low-temperature storage tank 1 and one to three rear-stage low-temperature storage tanks 2, and the two-stage replacement structures are combined and designed according to the number and the specification of actual low-temperature storage tanks on site. The rear stage adopts one to three low-temperature storage tanks which are respectively connected with the front stage, which is equivalent to parallel connection. The mixed gas displaced by the front-stage low-temperature storage tank 1 is simultaneously discharged into each rear-stage low-temperature storage tank 2, and the mixed gas displaced by the rear-stage low-temperature storage tank 2 is discharged to the exhaust gas combustion unit 8. The structure increases the rear-stage structure and reduces the direct discharge of the front stage.
In each two-stage replacement structure, a communication pipeline 11 is arranged at the pipeline section of the liquid phase port of the rear-stage low-temperature storage tank and the replacement gas port of the rear-stage low-temperature storage tank, and the common ship unloading pipeline 9 is connected with the liquid phase port of the storage tank through a pipeline. The propane mixed gas discharged from the front-stage low-temperature storage tank is discharged into a common ship unloading pipeline 9 through a liquid phase port of the front-stage low-temperature storage tank, is conveyed to the pipeline section of the liquid phase port of the rear-stage low-temperature storage tank through the common ship unloading pipeline, and is conveyed into the rear-stage low-temperature storage tank for secondary replacement through a communication pipeline 11 between the liquid phase port of the rear-stage low-temperature storage tank and the pipeline section with the ventilation port.
In this example, the gas phase port of the preceding cryogenic tank is closed by a control valve, and the displaced gas mixture is sent to the common ship unloading line 11 through the liquid phase port, because the ship unloading is not performed during the displacement gas, and the ship unloading and the displacement gas do not operate simultaneously. The liquid phase port of the rear-stage low-temperature storage tank is communicated with the pipeline section of the ventilating port, so that the mixed gas displaced by the front stage is sent into the liquid phase port of the rear-stage low-temperature storage tank through a common ship unloading pipeline and sent into the rear-stage low-temperature storage tank for secondary displacement. The mixed gas after secondary replacement is discharged from a gas phase port of the rear-stage low-temperature storage tank to a waste gas combustion unit for treatment. Therefore, direct discharge of the fore-stage low-temperature storage tank is reduced, and discharge is performed after secondary replacement, so that energy conservation and emission reduction can be realized.
If the gaseous medium in the fore-stage low-temperature storage tank is completely replaced and the gas in the rear-stage low-temperature storage tank is not completely replaced in the replacement process, the control valve can be adjusted to convert one rear-stage storage tank into other rear-stage fore-stage storage tanks to be continuously replaced, or the rear-stage low-temperature storage tank is communicated with the medium unloading system to complete the residual replacement. For example, if the volume concentration of propane in the displacement storage tank is more than 95%, the displacement gas is finished, and the liquid level is established after the precooling treatment of the low-temperature storage tank is carried out.
In this example, the medium unloading system 4 and the cryogenic medium unloading system 3 use the same type of medium, which may be ethane, ethylene, propane, propylene, LNG or liquid ammonia.
The second embodiment:
the alternative design of this embodiment is that in each two-stage replacement structure, the gas phase port of the preceding-stage cryogenic tank is connected with the replacement gas ports of one to three subsequent-stage cryogenic tanks, and the mixed gas discharged from the gas phase port of the preceding-stage cryogenic tank is sent into the storage tank through the replacement gas port of the subsequent-stage cryogenic tank for secondary replacement through control and regulation, and then is discharged after secondary replacement.
Example three:
the alternative design of this example is that, as shown in fig. 1, each two-stage displacement structure employs a front stage cryogenic tank 1 and a rear stage cryogenic tank 2, and the specifications of the front and rear stage cryogenic tanks are all 8 ten thousand cubic meters. A communicating pipeline 11 is arranged between the liquid phase port of each rear-stage low-temperature storage tank and the self gas replacement port, propane mixed gas discharged from the front-stage low-temperature storage tank 1 is discharged into a common ship unloading pipeline 9 through the liquid phase port, is sent to a liquid phase port connecting pipeline of the rear-stage low-temperature storage tank 2 through the common ship unloading pipeline 9, and is sent into the rear-stage low-temperature storage tank for secondary replacement through the communicating pipeline 11 between the liquid phase port of the rear-stage low-temperature storage tank and the gas replacement port.
The medium adopts propane, the medium unloading system is a propane unloading system, and the low-temperature medium unloading system is a low-temperature propane unloading system.
Example three:
the optional design of the embodiment is that in each two-stage replacement structure, the front stage adopts one low-temperature storage tank, the rear stage adopts two low-temperature storage tanks, and the specification of the front low-temperature storage tank and the specification of the two same low-temperature storage tanks at the rear stage are both 8 ten thousand cubic meters. A communicating pipeline is arranged between the liquid phase port of each rear-stage low-temperature storage tank and the replacement gas port of the rear-stage low-temperature storage tank, propane mixed gas discharged from the front-stage low-temperature storage tank is discharged into a common ship unloading pipeline through the liquid phase port and is sent to the liquid phase port connecting pipelines of the two rear-stage low-temperature storage tanks through the common ship unloading pipeline, and then the propane mixed gas is sent into the two rear-stage low-temperature storage tanks through the communicating pipeline between the liquid phase port of the rear-stage low-temperature storage tank and the replacement gas port to be subjected to secondary replacement respectively. The mixed gas after secondary replacement is discharged from a gas phase port of the rear-stage low-temperature storage tank to a waste gas combustion unit for treatment.
Application example:
the two existing storage tanks for respectively replacing low-temperature propane are designed into a two-stage replacement structure, one storage tank is a front-stage low-temperature propane storage tank, the other storage tank is a rear-stage low-temperature propane storage tank, and a liquid phase port of the rear-stage low-temperature storage tank is communicated with a self replacement gas port through a communication pipeline.
In the process of starting the front-stage low-temperature propane storage tank device, the mixed gas which does not reach 95% of propane volume concentration is used as the high-concentration propane gas for the real gas replacement of the other rear-stage low-temperature propane storage tank which needs to be started, so that the incineration emission of the propane gas is reduced, and the starting cost is also reduced.
In this example, the common ship-unloading pipeline for the two cryogenic propane tanks is used to transfer the high-concentration propane mixed gas to be discharged from the first-stage cryogenic propane tank 1 to the second-stage cryogenic propane tank 2 by adjusting the instrument control valve and optimizing the process operation, thereby reducing the propane consumption of the second-stage cryogenic propane tank and the flare-suppressed steam consumption. In the embodiment, two 8 ten thousand cubic meters of propane storage tanks are adopted, so that the incineration emission of about two hundred tons of propane gas can be reduced in 3 days of production, and the driving cost is reduced by about 70 ten thousand yuan.
Claims (5)
1. A starting system of a low-temperature storage tank comprises a plurality of low-temperature storage tanks, and a medium unloading system, a low-temperature medium unloading system and a waste gas combustion unit which are respectively connected with the low-temperature storage tanks; each low-temperature storage tank is provided with a gas replacement port, a gas phase port and a liquid phase port, the gas replacement ports are respectively connected with a medium unloading system, the gas phase ports are respectively connected with a waste gas combustion unit, and the liquid phase ports are respectively connected with the low-temperature medium unloading system through a public unloading pipeline, and the low-temperature storage tank is characterized in that: the plurality of low-temperature storage tanks are respectively combined into a plurality of two-stage replacement structures, each two-stage replacement structure comprises a front-stage low-temperature storage tank and one to three rear-stage low-temperature storage tanks, each rear-stage low-temperature storage tank is respectively connected with the front-stage low-temperature storage tank, mixed gas displaced by the front-stage low-temperature storage tank is discharged into each rear-stage low-temperature storage tank, and the mixed gas displaced by the rear-stage low-temperature storage tanks is discharged to the waste gas combustion unit.
2. A system for starting a cryogenic tank according to claim 1, wherein: in each two-stage replacement structure, a liquid phase port of the rear-stage low-temperature storage tank and a pipeline section of a replacement gas port of the rear-stage low-temperature storage tank are provided with a communication pipeline, mixed gas discharged by the front-stage low-temperature storage tank is discharged into a public ship unloading pipeline through the liquid phase port, the mixed gas is sent to the pipeline section of the liquid phase port of the rear-stage low-temperature storage tank through the public ship unloading pipeline, and then the mixed gas is connected to the replacement gas port of the rear-stage low-temperature storage tank through the communication pipeline and enters the storage tank for secondary replacement.
3. A system for starting a cryogenic tank according to claim 1, wherein: in each two-stage replacement structure, a gas phase port of the front-stage low-temperature storage tank is respectively connected with a replacement gas port of the rear-stage low-temperature storage tank, and mixed gas discharged from the gas phase port of the front-stage low-temperature storage tank is sent into the storage tank through the replacement gas port of the rear-stage low-temperature storage tank for secondary replacement.
4. A system for starting a cryogenic tank as claimed in claim 1, 2 or 3 wherein: the medium unloading system is also provided with a heating device, and the medium output by the unloading system is heated into a gaseous medium by the heating device and then is sent into the two-stage replacement structure.
5. The system for starting a cryogenic tank according to claim 4, wherein: the medium unloading system and the low-temperature medium unloading system adopt the same kind of medium, and the medium is ethane, ethylene, propane, propylene, LNG or liquid ammonia.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221880484.XU CN217714544U (en) | 2022-07-21 | 2022-07-21 | Driving system of low-temperature storage tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221880484.XU CN217714544U (en) | 2022-07-21 | 2022-07-21 | Driving system of low-temperature storage tank |
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| Publication Number | Publication Date |
|---|---|
| CN217714544U true CN217714544U (en) | 2022-11-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221880484.XU Active CN217714544U (en) | 2022-07-21 | 2022-07-21 | Driving system of low-temperature storage tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217714544U (en) |
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- 2022-07-21 CN CN202221880484.XU patent/CN217714544U/en active Active
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