CN212327247U - High-power foam system of LNG receiving station - Google Patents
High-power foam system of LNG receiving station Download PDFInfo
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- CN212327247U CN212327247U CN201922471695.2U CN201922471695U CN212327247U CN 212327247 U CN212327247 U CN 212327247U CN 201922471695 U CN201922471695 U CN 201922471695U CN 212327247 U CN212327247 U CN 212327247U
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Abstract
LNG receiving station high power foam system, its characterized in that: the high-pressure foam generator comprises a high-pressure water source, a high-power foam source, a valve, a proportional mixer, a foam pipeline, a three-way valve, a pressure gauge and a pipeline communicated with the atmosphere, wherein the high-pressure water source is connected with the proportional mixer through the valve, the high-power foam source is connected with the proportional mixer through another valve, an outlet of the proportional mixer is connected with the foam pipeline, the foam pipeline is connected with a pressure introduction pipeline and then connected with a three-way valve, the other way of the three-way valve is connected with the pressure gauge, the three-way valve is connected with the pipeline communicated with the atmosphere after passing through the valve, and the foam pipeline is connected with the high. When the manometer in high power foam system's proportional mixer low reaches detected for the negative pressure, open the pipeline with the atmosphere intercommunication, negative pressure in the fire control pipeline can be eliminated rapidly, gets rid of the water in the pipeline fast, prevents that the foam stoste from appearing to ensure that fire-fighting equipment is in normal standby state in real time, eliminate the potential safety hazard, can in time put into use high power foam stoste.
Description
Technical Field
The utility model relates to a high power foam system.
Background
When LNG leakage occurs on site, high-pressure fire-fighting water flows into the high-power foam system from the interface and is decompressed to 0.25MPag, flows through the pneumatic valve to the proportional mixer, meanwhile, high-power foam stock solution flows into the proportional mixer through the liquid outlet pipe and is mixed with fire-fighting pressure water according to a certain proportion to form mixed liquid, and the mixed liquid flows into the high-power foam generator through the pipeline to generate foam for fire extinguishing.
To ensure that the receiving station equipment is reliably ready for use, the receiving station high multiple foam system needs to be tested once a month. During the test, need keep apart high power foam stoste export hand valve and prevent high power foam stoste blowout, wait to drain the interior residual water of fire control pipeline after the test is accomplished, when the pipeline pressure gauge shows to be the malleation, just can put into use high power foam stoste export hand valve and prevent the stoste blowout.
In the actual drainage process of the high-multiple foam system of the existing receiving station, when the downstream of the fire-fighting pipeline drains water at a low position, negative pressure is formed because the upstream high point of the pipeline does not have an air suction point, and the air pressures at the upstream end and the downstream end of the pipeline are unbalanced. For accelerating the drainage process, during the daily operation, operating personnel carries out the tonifying qi through frequently dismantling the pressure release connecting screw of fire control pipeline upper reaches manometer, keeps the atmospheric pressure balance of upper and lower reaches both ends, eliminates the negative pressure. After the LNG receiving station high-power foam system is used or tested, residual water in the high-power foam system needs to be discharged, negative pressure is easily formed in a pipeline at the downstream of the proportioner in the discharging process, and the discharging time of the residual water is at least more than 8 hours. Therefore, the existing receiving station high-multiple foam system has the following defects:
1) frequent dismantlement manometer exhaust department connecting screw easily causes the smooth silk of screw to damage, and threaded connection department is easily not hard up, can become flexible under high foam operating pressure (0.2 Mpag) and pop out and cause the risk.
2) If the precision of the high-power foam outlet pressure gauge is not enough, negative pressure still exists in the fire fighting pipeline, the pressure gauge displays positive pressure, high-power foam stock solution is used at the moment, the high-power foam stock solution is discharged due to the negative pressure existing in the fire fighting pipeline, waste is caused, and manpower and resource waste is caused by subsequent cleaning of the collecting pool and refilling of the foam stock solution.
3) After the test is finished, the drainage time needs to be maintained for more than 8 hours, the high-power foam system stock solution cannot be normally used, after LNG leakage occurs, great potential safety hazards exist, the high-power foam system stock solution is used in time, and great influence is brought to fire prevention of a receiving station.
Disclosure of Invention
The utility model aims to solve the technical problem that overcome the above-mentioned not enough and provide LNG receiving station high power foam system of prior art, it can conveniently shorten the pipeline drainage time safely.
The utility model provides a technical scheme that above-mentioned technical problem adopted does:
the high-power foam system of the LNG receiving station comprises a high-pressure water source, a high-power foam source, a valve, a proportional mixer, a foam pipeline, a three-way valve, a pressure gauge and a pipeline communicated with the atmosphere, wherein the high-pressure water source is connected with the proportional mixer through the valve, the high-power foam source is connected with the proportional mixer through another valve, an outlet of the proportional mixer is connected with the foam pipeline, the foam pipeline is connected with a pressure introduction pipeline and then connected with a three-way valve, the other way of the three-way valve is connected with the pressure gauge, the three-way valve is connected with the pipeline communicated with the atmosphere after passing through the valve, and the foam pipeline is connected with a high-power foam.
Preferably, the high-pressure water source is connected with the proportioning device through the filter, so that impurities in the high-pressure water source can be eliminated, and the pipeline or the nozzle is prevented from being blocked by the impurities.
Preferably, the high-pressure water source is connected with the proportional mixer through a pneumatic valve, so that the automatic control can be realized.
Preferably, the high-power foam source is connected with the proportioning mixer through a manual valve, so that the operation is timely and convenient by hands.
Compared with the prior art, the utility model has the advantages of: when the manometer in high power foam system's proportional mixer low reaches detected for the negative pressure, open the pipeline with the atmosphere intercommunication, negative pressure in the fire control pipeline can be eliminated rapidly, gets rid of the water in the pipeline fast, prevents that the foam stoste from appearing to ensure that fire-fighting equipment is in normal standby state in real time, eliminate the potential safety hazard, can in time put into use high power foam stoste.
Drawings
Fig. 1 is the utility model discloses LNG receiving station high power foam system's schematic structure.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
As shown in fig. 1, the high-power foam system of the LNG receiving station includes a high-pressure foam stock solution storage tank 1, a high-pressure fire water container 2, a filter 3, a pneumatic valve 4, a valve 5, a proportioner 6, a tee joint 7, a pressure gauge 8, a manual valve 9 and a discharge pipeline 10.
The high-pressure fire-fighting water container 2 is connected with a proportional mixer 6 through a filter 3 and a pneumatic valve 4, a high-pressure foam stock solution storage tank 1 is connected with the proportional mixer 6 through another valve 5, an outlet of the proportional mixer 6 is connected with a foam pipeline, one path of the high-pressure foam stock solution storage tank is connected with a tee joint 7 after being connected with a pressure introduction pipeline, the other path of the tee joint 7 is connected with a pressure gauge 8, the other path of the tee joint 7 is connected with a discharge pipeline 10 communicated with the atmosphere through a manual valve 9, the proportional mixer 6 is connected with a high-power foam generator 11, and mixed liquid obtained by mixing and diluting foam at an outlet of the proportional mixer 6 enters the high-power foam generator to generate foam for.
After the high-power foam system test is completed, when water needs to be drained, the manual valve 9 of the pressure guiding pipe is opened to be communicated with the atmosphere, the air pressure balance of the two ends of the upstream and downstream of the fire-fighting pipeline is ensured, negative pressure is prevented from being formed, the water in the pipeline is ensured to be drained in time, then the manual valve 9 is closed, and high-power foam stock solution is timely used.
Claims (4)
- LNG receiving station high power foam system, its characterized in that: the high-pressure foam generator comprises a high-pressure water source, a high-power foam source, a valve, a proportional mixer, a foam pipeline, a three-way valve, a pressure gauge and a pipeline communicated with the atmosphere, wherein the high-pressure water source is connected with the proportional mixer through the valve, the high-power foam source is connected with the proportional mixer through another valve, an outlet of the proportional mixer is connected with the foam pipeline, the foam pipeline is connected with a pressure introduction pipeline and then connected with a three-way valve, the other way of the three-way valve is connected with the pressure gauge, the three-way valve is connected with the pipeline communicated with the atmosphere after passing through the valve, and the foam pipeline is connected with the high.
- 2. The LNG receiving station high power foam system of claim 1, wherein: the high-pressure water source is connected with the proportioning mixer through the filter.
- 3. The LNG receiving station high power foam system of claim 1, wherein: the high-pressure water source is connected with the proportional mixer through a pneumatic valve.
- 4. The LNG receiving station high power foam system of claim 1, wherein: the high-power foam source is connected with the proportioning mixer through a manual valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922471695.2U CN212327247U (en) | 2019-12-31 | 2019-12-31 | High-power foam system of LNG receiving station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922471695.2U CN212327247U (en) | 2019-12-31 | 2019-12-31 | High-power foam system of LNG receiving station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212327247U true CN212327247U (en) | 2021-01-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922471695.2U Active CN212327247U (en) | 2019-12-31 | 2019-12-31 | High-power foam system of LNG receiving station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212327247U (en) |
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2019
- 2019-12-31 CN CN201922471695.2U patent/CN212327247U/en active Active
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