CN211315779U - Large wet-type gas holder emergency cut-off device and large wet-type gas holder - Google Patents
Large wet-type gas holder emergency cut-off device and large wet-type gas holder Download PDFInfo
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- CN211315779U CN211315779U CN201922068787.6U CN201922068787U CN211315779U CN 211315779 U CN211315779 U CN 211315779U CN 201922068787 U CN201922068787 U CN 201922068787U CN 211315779 U CN211315779 U CN 211315779U
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Abstract
The utility model discloses a large wet-type gas holder emergency cut-off device, which comprises an isolation groove higher than a gas holder water tank, and is provided with two gas inlet and outlet pipelines, one pipeline is arranged at the side surface of the isolation groove and higher than the overflow liquid level of the gas holder water tank and is communicated with a gas holder, and the other pipeline is communicated with a process gas header pipe and is inserted from the top of the isolation groove to the bottom close to the isolation groove; and the lower part of the isolation groove is provided with a water inlet and a liquid discharge valve, and the water inlet is communicated with the lower part of the water tank of the gas holder through a pipeline provided with an interlocking switch valve. When the gas cabinet needs to be isolated in case of accident, the interlocking switch valve is opened, water in the water tank quickly enters the isolation tank, a liquid seal is formed in a short time to separate gas from the gas cabinet, and the liquid level in the isolation tank continuously rises to be level with the liquid level of the water tank of the gas cabinet, so that the gas cabinet is completely isolated. The utility model discloses can reduce the investment cost of large-scale wet-type gas holder emergency cut-off measure by a wide margin, effectively shorten the isolation time, realize gaseous zero in the gas holder and reveal the isolation, have higher security and economic nature.
Description
Technical Field
The utility model belongs to the technical field of the chemical industry, concretely relates to large-scale wet-type gas holder promptly cuts off device.
Background
The large wet gas holder for holding combustible and harmful gas is widely applied to the fields of petroleum and chemical industry. As a major hazard source, emergency shut-off measures must be set at the inlet and outlet of the gas cabinet to meet the isolation requirements of the gas cabinet under accident conditions. The isolation method commonly adopted in the industry at present is to install an interlocking cut-off valve on an inlet and outlet gas pipeline of a gas holder. For a large-scale gas cabinet with an inlet and outlet pipeline larger than DN1200mm, the large-caliber interlocking pneumatic cut-off valve has the problems of high investment, long closing action time, incapability of ensuring zero gas leakage and the like.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, an object of the utility model is to provide a large-scale wet-type gas holder emergency cut-off device can replace the pneumatic trip valve of heavy-calibre interlocking among the prior art, realizes fast that the gas holder cuts off under the prerequisite of practicing thrift the cost to improve sealed isolated effect.
The utility model discloses a following technical scheme:
a large wet-type gas holder emergency cut-off device comprises an isolation groove higher than a gas holder water tank, wherein the water seal groove comprises two gas inlet and outlet pipelines, one pipeline is arranged on the side surface of the isolation groove and higher than the overflow liquid level of the gas holder water tank and is communicated with the gas holder, and the other pipeline is communicated with a process gas main pipe and is inserted from the top of the isolation groove to the position close to the bottom of the isolation groove; and the lower part of the isolation groove is provided with a water inlet and a liquid discharge valve, and the water inlet is communicated with the lower part of the water tank of the gas holder through a pipeline provided with an interlocking switch valve.
Further, the isolation groove is a container with a certain volume, the shape of the container comprises a cylindrical shape and a prismatic shape, as a preferred embodiment of the scheme, the height of the isolation groove is not less than 2 meters higher than the overflow liquid level of the water tank of the gas holder, the isolation groove is cylindrical, and the diameter of the isolation groove is 1.3-1.5 times of the diameter of the gas inlet and outlet pipeline. The volume of the container is closely related to the smoothness of the gas passage under normal conditions and the time required to establish a liquid-tight seal. On one hand, when the container is large in size, gas can pass through the container in a normal state, but the time required for isolation is inevitably prolonged; on the other hand, when the volume of the container and the diameter of the isolation groove are small, the isolation time is fast, but the normal passing of gas is not facilitated.
Further, a gas inlet and outlet pipeline communicated with the process gas main pipe extends to a position 300-500mm away from the water seal bottom.
Furthermore, the switch valve is an interlocking switch valve, so that the interlocking control is more convenient and faster, and the automation is realized.
Furthermore, the diameter of a pipeline between the water inlet of the isolation groove and the water tank of the gas holder is one fourth of that of a gas inlet and outlet pipeline, the diameter of the pipeline is closely related to investment cost, when the diameter of the pipeline is small, the pipeline is not favorable for quick water sealing isolation, and when the diameter of the pipeline is large, the investment of a required interlocking switch valve is increased, and the cost input is increased.
The utility model also discloses a large-scale wet-type gas holder, including the bell jar of upper portion and the gas holder basin of lower part, including aforementioned large-scale wet-type gas holder emergency shutdown device.
Since the technical scheme is used, the utility model discloses following beneficial effect has: the utility model discloses a set up one set of isolation water seal system and replace heavy-calibre interlocking trip valve on the exit pipeline of gas holder, can reduce the investment cost of large-scale wet-type gas holder emergency cut-off measure by a wide margin, effectively shorten the isolation time, realize gaseous zero in the gas holder and reveal the isolation, compare with prior art, have higher security and economic nature.
Drawings
In order to more clearly illustrate the technical solution of the mode of the invention, the drawings that are required to be used in the embodiment are briefly described below, it should be understood that the following drawings only illustrate some embodiments of the invention, and are not to be considered as limiting the scope, and that for a person skilled in the art, other relevant drawings can be obtained from these drawings without inventive effort.
Fig. 1 is a schematic view of a large wet gas holder emergency cutoff device of the present invention;
in the figure, 1 is a bell jar, 2 is a water tank, 3 is an overflow line, 4 is a continuous water supply line, 5 is an isolation tank, 6 is a process gas main pipe, 7 is a liquid discharge valve, and 8 is an interlocking switch valve.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Example 1
As shown in FIG. 1, the wet gas holder is composed of an upper bell jar 1 and a lower water tank 2, the operating pressure is controlled to be 2-3 KPag according to the counterweight, and the design pressure is usually not more than 6 Kag. The water tank 2 has an overflow line 3 and a continuous makeup line 4. The large wet-type gas holder emergency cut-off device comprises an isolation groove 5 which is higher than the overflow liquid level of a gas holder water tank 2 and is not less than 2 meters, wherein the isolation groove 5 is normal pressure equipment, and the temperature and the pressure are designed to be the same as those of a gas holder. The isolation groove 5 is a hollow cylindrical tank body, and the diameter of the tank body is 2300 mm. The isolation groove 5 comprises two gas inlet and outlet pipelines, the diameter of the pipeline is DN1600, one pipeline is arranged at the position on the side surface of the isolation groove, which is higher than the overflow liquid level of the water tank of the gas cabinet and is communicated with the gas cabinet bell jar 1, and the other pipeline is communicated with the process gas main pipe 6 and is inserted into the position, which is about 400mm away from the bottom plate, of the bottom of the isolation groove 5 from the top of the isolation groove 5; the lower part of the isolation groove 5 is provided with a water inlet and a liquid discharge valve 7, and the water inlet is communicated with the lower part of the gas holder water tank 2 through a DN400 pipeline with an interlocking switch valve 8.
Under normal operating conditions, no water is in the isolation groove 5, and gas enters and exits the gas cabinet through the isolation groove 5. When the device has an accident, the interlocking switch valve 8 on the pipeline between the isolation groove and the water groove is interlocked and opened when the gas holder needs to be isolated, water in the water groove 2 at the lower part of the gas holder quickly enters the water seal through the pipeline, and a liquid level which submerges the inlet at the lower part of the gas inlet and outlet pipeline inserted into the bottom and is 1 meter high is formed in the isolation groove within 20 seconds, so that gas is isolated from entering and exiting the gas holder. And then the liquid level in the water seal is continuously raised and is raised to be flush with the liquid level of the water tank at the lower part of the gas holder in a short time, so that the gas holder is further ensured to be completely isolated, and zero leakage of gas is realized. The liquid level of the water tank 2 at the lower part of the gas holder is maintained by continuously replenishing water through a pipeline 4. When the gas holder needs to be isolated, the interlocking switch valve 8 on the pipeline is closed, and the isolating groove is emptied through the liquid discharge valve 7 at the bottom of the isolating groove 5.
With 1 table 20000m3The caliber of the inlet and outlet pipeline of the pyrolysis gas cabinet is DN 1600. 1 carbon steel pneumatic interlocking cut-off valve (Sil2 grade) is installed on the pipeline, the price is about 100 ten thousand yuan, the valve interlocking closing time is about 45 seconds, and zero leakage cannot be realized. The large wet-type gas holder emergency cut-off device adopting the scheme still uses 20000m3The cost of adding water seal and reforming pipeline is about 23 ten thousand yuan, and the price of DN400 interlocking switch valve (Sil2 grade) is 15 ten thousand; the time from the beginning of water replenishing to the complete gas isolation is only 18 seconds; zero leakage isolation of gas in and out of the gas holder can be realized after the water seal is formed.
The scheme can greatly reduce the investment cost of emergency cutoff measures of the large wet-type gas holder, effectively shorten the isolation time, completely stop gas leakage and have higher safety and economical efficiency than the existing scheme.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. The utility model provides a large-scale wet-type gas holder emergency cut-off device which characterized in that: the device comprises an isolation groove which is higher than a gas holder water tank, wherein the isolation groove comprises two gas inlet and outlet pipelines, one pipeline is arranged at the side surface of the isolation groove, which is higher than the overflow liquid level of the gas holder water tank and is communicated with a gas holder, and the other pipeline is communicated with a process gas main pipe and is inserted from the top of the isolation groove to the bottom of the isolation groove; and the lower part of the isolation groove is provided with a water inlet and a liquid discharge valve, and the water inlet is communicated with the lower part of the water tank of the gas holder through a pipeline provided with an interlocking switch valve.
2. A large wet gas holder emergency shut-off device according to claim 1, wherein: the isolation tank is a container with a certain volume, and the shape of the container comprises a cylinder shape and a prism shape.
3. A large wet gas holder emergency shut-off device according to claim 2, wherein: the height of the isolation groove is not less than 2 meters higher than the overflow liquid level of the water tank of the gas holder.
4. A large wet gas holder emergency shut-off device according to claim 3, wherein: the isolation groove is cylindrical, and the diameter of the water seal is 1.3-1.5 times of the gas inlet and outlet pipeline.
5. A large wet gas holder emergency shut-off device according to claim 1, wherein: and a gas inlet and outlet pipeline communicated with the process gas main pipe extends into a position which is 300-500mm away from the bottom of the isolation tank.
6. A large wet gas holder emergency shut-off device according to claim 1, wherein: the switch valve is an interlocking switch valve.
7. A large wet gas holder emergency shut off device according to claim 6, wherein: the diameter of a pipeline between the water inlet of the isolation groove and the water tank of the gas holder is one fourth of that of a gas inlet and outlet pipeline.
8. A large wet gas holder comprising an upper bell jar and a lower holder tank, characterized in comprising a large wet gas holder emergency shut-off device according to any one of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922068787.6U CN211315779U (en) | 2019-11-26 | 2019-11-26 | Large wet-type gas holder emergency cut-off device and large wet-type gas holder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922068787.6U CN211315779U (en) | 2019-11-26 | 2019-11-26 | Large wet-type gas holder emergency cut-off device and large wet-type gas holder |
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| Publication Number | Publication Date |
|---|---|
| CN211315779U true CN211315779U (en) | 2020-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922068787.6U Active CN211315779U (en) | 2019-11-26 | 2019-11-26 | Large wet-type gas holder emergency cut-off device and large wet-type gas holder |
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| Country | Link |
|---|---|
| CN (1) | CN211315779U (en) |
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2019
- 2019-11-26 CN CN201922068787.6U patent/CN211315779U/en active Active
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