CN219588689U - Nitrogen sealing structure for storage tank in middle tank area - Google Patents
Nitrogen sealing structure for storage tank in middle tank area Download PDFInfo
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- CN219588689U CN219588689U CN202320786857.5U CN202320786857U CN219588689U CN 219588689 U CN219588689 U CN 219588689U CN 202320786857 U CN202320786857 U CN 202320786857U CN 219588689 U CN219588689 U CN 219588689U
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Abstract
The utility model relates to the technical field of storage tank nitrogen, and discloses a nitrogen sealing structure of a storage tank in an intermediate tank area, which comprises a tank body, wherein one side of the top of the tank body is provided with a nitrogen supply valve mechanism, the other side of the top of the tank body is provided with a nitrogen release valve mechanism, the nitrogen supply valve mechanism and the nitrogen release valve mechanism are both connected with the tank body through pipelines, one end of the nitrogen supply valve mechanism is fixedly connected with a nitrogen pipeline, the other end of the nitrogen supply valve mechanism is fixedly connected with one side of the top of the tank body through a pipeline, the top of the nitrogen supply valve mechanism is provided with a nitrogen supply cut-off valve, one end of the nitrogen supply cut-off valve is fixedly connected with one side of the top of the tank body through a pipeline, and one end of the nitrogen release valve mechanism is fixedly connected with one side of the top of the tank body through a pipeline. In the utility model, the pressure in the tank body is balanced by the close fit of the additionally arranged breather valve and the emergency breather valve through the nitrogen supply valve mechanism and the nitrogen release valve mechanism, and unnecessary nitrogen loss and waste are avoided.
Description
Technical Field
The utility model relates to the technical field of storage tank nitrogen, in particular to a nitrogen sealing structure of a storage tank in an intermediate tank area.
Background
The middle storage tank gas is inert gas containing organic components after nitrogen sealing, a breather valve is not additionally arranged according to the existing storage tank provided with the nitrogen sealing (when the accident failure of the nitrogen sealing valve cannot be timely opened or closed, the pressure in the tank is too high or too low and cannot be discharged or supplemented through the breathing action of the fire-retardant breather valve), an emergency discharging device (the safety discharge of the nitrogen sealing storage tank in the accident state cannot be ensured, the design pressure is higher than the upper limit of the design pressure of the storage tank), a pressure interval is reasonably set, the design pressure of the storage tank is downwards discharged, the intersection of the action pressure intervals of all safety accessories cannot be ensured, and nitrogen loss and waste are easy to generate.
Disclosure of Invention
The utility model aims to solve the defects in the prior art, and provides a nitrogen sealing structure of a storage tank in an intermediate tank area.
In order to achieve the above purpose, the present utility model adopts the following technical scheme: the utility model provides a middle tank field storage tank nitrogen gas seal structure, includes the jar body, top one side of the jar body is provided with supplies nitrogen valve mechanism, the top opposite side of the jar body is provided with lets out nitrogen valve mechanism, supply nitrogen valve mechanism and let out nitrogen valve mechanism all link to each other with the jar body through the pipeline, the one end fixedly connected with nitrogen pipe of supplying nitrogen valve mechanism, the other end that supplies nitrogen valve mechanism passes through pipeline fixed connection in top one side of the jar body, the top that supplies nitrogen valve mechanism is provided with supplies nitrogen trip valve, the one end that supplies nitrogen trip valve passes through pipeline fixed connection in top one side of the jar body, let out nitrogen valve mechanism one end and pass through pipeline fixed connection in top one side of the jar body, the top of letting out nitrogen valve mechanism is provided with the liquid seal jar, the top of liquid seal jar is provided with the second governing valve, the top fixedly connected with urgent breather valve of the jar body, the top of the jar body is connected with the breather valve through the pipeline connection, one side fixedly connected with of breather valve connects tail gas processing apparatus, the breather valve passes through the pipeline and links to each other with self-supporting car gas phase balance tube.
As a further description of the above technical solution:
the nitrogen supply valve mechanism can adopt a first self-standing regulating valve or a nitrogen supply cut-off valve, and the nitrogen discharge valve mechanism can adopt a second self-standing regulating valve, a liquid seal tank and a nitrogen discharge cut-off valve.
As a further description of the above technical solution:
one side of the outer wall of the tank body is fixedly connected with a balance liquid level meter, and the other side of the outer wall of the tank body is fixedly connected with a nitrogen content sensor.
As a further description of the above technical solution:
one side of the outer wall of the tank body is fixedly connected with a temperature transmitter, and the other side of the outer wall of the tank body is fixedly connected with a pressure transmitter and a liquid level transmitter respectively.
As a further description of the above technical solution:
the feeding cut-off valve is fixedly connected to one side of the outer wall of the tank body, and a feeding pipe is arranged at one end of the feeding cut-off valve.
As a further description of the above technical solution:
one side of the outer wall of the tank body is fixedly connected with a discharge cut-off valve, and one end of the discharge cut-off valve is provided with a discharge pipe.
As a further description of the above technical solution:
and one side of the top of the tank body is fixedly connected with an emergency release manhole.
The utility model has the following beneficial effects:
1. in the utility model, firstly, the breathing valve and the emergency breathing valve are additionally arranged to be closely matched through the nitrogen supply valve mechanism and the nitrogen release valve mechanism, so that the pressure in the tank body is balanced, and unnecessary nitrogen loss and waste are avoided.
Drawings
Fig. 1 is a plan view of a nitrogen sealing structure of a storage tank in an intermediate tank area.
Legend description:
1. a tank body; 2. a feed cut-off valve; 3. a feed pipe; 4. a temperature transmitter; 5. a respiratory valve; 6. a sediment level gauge; 7. a first self-standing regulating valve; 8. a nitrogen gas pipe; 9. a nitrogen supply shutoff valve; 10. a gas phase balance pipe of the loading and unloading vehicle; 11. connecting a tail gas treatment device; 12. an emergency breathing valve; 13. a second self-standing regulating valve; 14. a liquid seal tank; 15. a nitrogen release shut-off valve; 16. an emergency release manhole; 17. a nitrogen content sensor; 18. a pressure transmitter; 19. a liquid level transmitter; 20. a discharging cut-off valve; 21. and a discharging pipe.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1, one embodiment provided by the present utility model: the nitrogen sealing structure of the storage tank in the middle tank area comprises a tank body 1, wherein one side of the top of the tank body 1 is provided with a nitrogen supply valve mechanism, the other side of the top of the tank body 1 is provided with a nitrogen release valve mechanism, the nitrogen supply valve mechanism and the nitrogen release valve mechanism are connected with the tank body 1 through pipelines, one end of the nitrogen supply valve mechanism is fixedly connected with a nitrogen pipeline 8, the other end of the nitrogen supply valve mechanism is fixedly connected with one side of the top of the tank body 1 through a pipeline, the top of the nitrogen supply valve mechanism is provided with a nitrogen supply cut-off valve 9, one end of the nitrogen supply cut-off valve 9 is fixedly connected with one side of the top of the tank body 1 through a pipeline, one end of the nitrogen release valve mechanism is fixedly connected with one side of the top of the tank body 1 through a pipeline, the top of the nitrogen release mechanism is provided with a liquid seal tank 14, the top of the liquid seal tank 14 is provided with a second self-standing regulating valve 13, the top fixedly connected with emergency breather valve 12 of jar body 1, the top of jar body 1 is through the pipe connection there being breather valve 5, to the jar body 1 that needs oil gas seal to handle, for the safety of jar body 1, jar body 1 needs to be equipped with tertiary pressure protection measure, namely nitrogen seal system, breather valve 5 and emergency breather valve 12, one side fixedly connected with of breather valve 5 connects tail gas processing apparatus 11, breather valve 5 is connected with loading and unloading car gas phase balance pipe 10 through the pipeline, set up first self-supporting governing valve 7 on nitrogen gas pipeline 8, carry out the pre-decompression to operating pressure to nitrogen gas before the valve, take the pressure control valve action behind the valve, this nitrogen supply mode adopts mechanical structure, need not external power source, the system is simple, supply nitrogen valve mechanism mode two: the pressure transmitter 18 is arranged on the tank body 1, the nitrogen supply cut-off valve 9 is arranged on the nitrogen pipeline 8, so that nitrogen is pre-decompressed, and the pressure of the tank body is controlled within a certain range through the setting of the PLC or the DCS. The mode has the advantages that the primary investment is large, the control precision is high, the maintenance cost is low, after the pressure of the tank body 1 reaches the set pressure, the breather valve 5 is opened, nitrogen is discharged from the tail gas receiving treatment device 11, if the exhaust gas needs to be treated, the gas phase balance pipe 10 of the loading and unloading truck is adopted, the mode has simple structure and wide application, the investment is saved, the nitrogen discharging valve mechanism takes liquid of the liquid seal tank 14 as a VOCS exhaust pressure setting element, when the exhaust pressure exceeds the static pressure of the water seal, the liquid breaks through the water seal and is discharged into the pipe, the liquid seal tank 14 is used as fire retarding equipment and pressure setting equipment, the liquid level height needs to be maintained in normal operation, the nitrogen discharging valve mechanism adopts a mechanical structure by arranging the second self-supporting regulating valve 13 on a pipeline, the pressure control valve is taken on the side of the tank body 1 before the valve, an external power source is not needed in the nitrogen supplying mode, the pressure of the tank body 1 is controlled in a certain range by the arrangement of the PLC or DCS, the mode has the obvious advantages of high control precision, low maintenance cost and the like.
The nitrogen supply valve mechanism can adopt a first self-standing regulating valve 7 or a nitrogen supply cut-off valve 9, the nitrogen release valve mechanism can adopt a second self-standing regulating valve 13, a liquid seal tank 14 and a nitrogen release cut-off valve 15, the nitrogen supply valve mechanism and the nitrogen release valve mechanism can adopt one mode, one side of the outer wall of the tank body 1 is fixedly connected with a balance of liquid level meter 6 for watching the liquid level action in the tank body 1, the other side of the outer wall of the tank body 1 is fixedly connected with a nitrogen content sensor 17, the reliability of a nitrogen seal system of the storage tank is judged through the nitrogen content sensor 17 and meets the safety of subsequent oil and gas treatment facilities, one side of the outer wall of the tank body 1 is fixedly connected with a temperature transmitter 4, the temperature transmitter 4 is an instrument for converting temperature variables into transmissible standardized output signals, the measuring and controlling functions are mainly used for industrial process temperature parameters, the other side of the outer wall of the tank body 1 is fixedly connected with a pressure transmitter 18 and a liquid level transmitter 19 respectively, the pressure transmitter 18 is an instrument for receiving pressure variable, converting the pressure variable into standard output signal according to a certain proportion after sensing conversion, the liquid level transmitter 19 can convert the change of various material level parameters into standard current signal, and remotely transmit the standard current signal to the operation control room for centralized display, alarm or automatic control by a secondary instrument or a computer, one side of the outer wall of the tank body 1 is fixedly connected with the feed cut-off valve 2, one end of the feed cut-off valve 2 is provided with the feed pipe 3, the feed cut-off valve 2 is used for stopping feeding by feeding the material into the tank body 1 from the feed pipe 3, one side of the outer wall of the tank body 1 is fixedly connected with the discharge cut-off valve 20, one end of the discharge cut-off valve 20 is provided with the discharge pipe 21, the discharge cut-off valve 20 is used for stopping discharging the material when the material is discharged from the discharge pipe 21, the emergency release manhole 16 is fixedly connected to one side of the top of the tank body 1, when the feeding of the tank body 1 occurs and the safety facility fails, or the tank body 1 is roasted by external fire, or the nitrogen supply valve mechanism is continuously opened by fault, or the heating coil in the tank body 1 leaks, or the cooling medium of the tank body 1 is interrupted, and the like, a large amount of gas is discharged without time, and when the internal pressure of the tank body 1 rises to the emergency release pressure, the emergency release manhole opens the exhaust.
Working principle: first, the nitrogen supply valve mechanism mode one: set up first self-supporting governing valve 7 on nitrogen gas pipeline 8, carry out the pre-decompression to operating pressure to nitrogen gas before the valve, get pressure control valve action behind the valve, this nitrogen supply mode adopts mechanical structure, need not external power source, and the system is simple, supplies nitrogen valve mechanism mode two: the pressure transmitter 18 is arranged on the tank body 1, the nitrogen supply cut-off valve 9 is arranged on the nitrogen pipeline 8, so that nitrogen is pre-decompressed, and the pressure of the tank body is controlled within a certain range through the setting of the PLC or the DCS. The mode has the advantages that the primary investment is large, the control precision is high, the maintenance cost is low, after the pressure of the tank body 1 reaches the set pressure, the breather valve 5 is opened, nitrogen is discharged from the tail gas receiving treatment device 11, if the exhaust gas needs to be treated, the gas phase balance pipe 10 of the loading and unloading truck is adopted, the mode has simple structure and wide application, the investment is saved, the nitrogen discharging valve mechanism takes liquid of the liquid seal tank 14 as a VOCS exhaust pressure setting element, when the exhaust pressure exceeds the static pressure of the water seal, the liquid breaks through the water seal and is discharged into the pipe, the liquid seal tank 14 is used as fire retarding equipment and pressure setting equipment, the liquid level height needs to be maintained in normal operation, the nitrogen discharging valve mechanism adopts a mechanical structure by arranging the second self-supporting regulating valve 13 on a pipeline, the pressure control valve is taken on the side of the tank body 1 before the valve, an external power source is not needed in the nitrogen supplying mode, the pressure of the tank body 1 is controlled in a certain range by the arrangement of the PLC or DCS, the mode has the obvious advantages of high control precision, low maintenance cost and the like.
Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present utility model, and although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present utility model.
Claims (7)
1. The utility model provides a middle tank field storage tank nitrogen gas seal structure, includes a jar body (1), its characterized in that: the utility model discloses a device for treating exhaust gas, including jar body (1), top one side of the jar body (1) is provided with supplies nitrogen valve mechanism, the top opposite side of the jar body (1) is provided with lets out nitrogen valve mechanism, supply nitrogen valve mechanism and let out nitrogen valve mechanism all link to each other with jar body (1) through the pipeline, the one end fixedly connected with nitrogen pipeline (8) of supplying nitrogen valve mechanism, the other end of supplying nitrogen valve mechanism passes through pipeline fixedly connected with top one side of the jar body (1), the top of supplying nitrogen valve mechanism is provided with supplies nitrogen trip valve (9), the one end of supplying nitrogen trip valve (9) passes through pipeline fixedly connected with top one side of the jar body (1), let out nitrogen valve mechanism one end and pass through pipeline fixedly connected with top one side of the jar body (1), let out nitrogen valve mechanism's top is provided with liquid seal tank (14), the top of liquid seal tank (14) is provided with second self-supporting governing valve (13), the top fixedly connected with emergency valve (12) of the jar body (1), the top of the breathing body (1) is through pipeline connection with breathing valve (5), one side (5) is connected with gas phase equilibrium device (10) through gas handling valve (5).
2. The intermediate tank farm storage tank nitrogen gas seal structure according to claim 1, wherein: the nitrogen supply valve mechanism can adopt a first self-standing regulating valve (7) or a nitrogen supply cut-off valve (9), and the nitrogen release valve mechanism can adopt a second self-standing regulating valve (13), a liquid seal tank (14) and a nitrogen release cut-off valve (15).
3. The intermediate tank farm storage tank nitrogen gas seal structure according to claim 1, wherein: one side of the outer wall of the tank body (1) is fixedly connected with a surplus sinking level gauge (6), and the other side of the outer wall of the tank body (1) is fixedly connected with a nitrogen content sensor (17).
4. The intermediate tank farm storage tank nitrogen gas seal structure according to claim 1, wherein: one side of the outer wall of the tank body (1) is fixedly connected with a temperature transmitter (4), and the other side of the outer wall of the tank body (1) is fixedly connected with a pressure transmitter (18) and a liquid level transmitter (19) respectively.
5. The intermediate tank farm storage tank nitrogen gas seal structure according to claim 1, wherein: the feeding cut-off valve (2) is fixedly connected to one side of the outer wall of the tank body (1), and a feeding pipe (3) is arranged at one end of the feeding cut-off valve (2).
6. The intermediate tank farm storage tank nitrogen gas seal structure according to claim 1, wherein: the discharging cut-off valve (20) is fixedly connected to one side of the outer wall of the tank body (1), and a discharging pipe (21) is arranged at one end of the discharging cut-off valve (20).
7. The intermediate tank farm storage tank nitrogen gas seal structure according to claim 1, wherein: an emergency release manhole (16) is fixedly connected to one side of the top of the tank body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320786857.5U CN219588689U (en) | 2023-04-11 | 2023-04-11 | Nitrogen sealing structure for storage tank in middle tank area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320786857.5U CN219588689U (en) | 2023-04-11 | 2023-04-11 | Nitrogen sealing structure for storage tank in middle tank area |
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| Publication Number | Publication Date |
|---|---|
| CN219588689U true CN219588689U (en) | 2023-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320786857.5U Active CN219588689U (en) | 2023-04-11 | 2023-04-11 | Nitrogen sealing structure for storage tank in middle tank area |
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| CN (1) | CN219588689U (en) |
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2023
- 2023-04-11 CN CN202320786857.5U patent/CN219588689U/en active Active
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