Automatic water injection device of full-pressure liquefied hydrocarbon storage tank

Abstract

The utility model belongs to the technical field of liquefied hydrocarbon storage tanks, and particularly relates to an automatic water injection device of a full-pressure liquefied hydrocarbon storage tank. Comprising a full-pressure type liquefied hydrocarbon storage tank, a feeding pipeline is connected to the bottom of the full-pressure type liquefied hydrocarbon storage tank, a first manual valve, a liquid level emergency cut-off valve and a material emergency cut-off valve are sequentially arranged on the feeding pipeline from the end close to the full-pressure type liquefied hydrocarbon storage tank, a water injection pipeline is connected between the liquid level emergency cut-off valve and the material emergency cut-off valve, and a second manual valve is connected between the water injection pipeline and the full-pressure type liquefied hydrocarbon storage tank. A second manual valve is arranged at the position, close to the water injection point by the minimum distance, of the water injection pipeline, a first remote control valve, a first check valve, a third manual valve, a fourth manual valve, a second remote control valve, a second check valve and a special water injection pump are sequentially arranged behind the water injection pipeline, and an electric heating belt is wound on the outer wall of the water injection pipeline. By optimizing the water injection mode and the design of the control system, the safety and the quick response capability of the full-pressure liquefied hydrocarbon storage tank in emergency are remarkably improved, and the accident risk is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to liquefied hydrocarbon storage tank technical field, concretely relates to full pressure type liquefied hydrocarbon storage tank automatic water injection device. BACKGROUND

[0002] In the storage and transportation of liquefied hydrocarbon, full pressure type liquefied hydrocarbon storage tank plays a vital role. However, such storage tank is often threatened by leakage risk in the operation process. Leakage not only leads to waste of resources and environmental pollution, but also may cause fire, explosion and other serious safety accidents, which poses a major threat to personnel life and property safety. Especially in the accident state, how to respond to leakage quickly and effectively is the key to ensure the safe operation of the storage tank.

[0003] The traditional water injection mode has problems such as complex operation and slow response speed, so that the traditional water injection mode is difficult to meet the rapid response demand under the condition of emergency leakage. Especially after the leakage occurs, if the water injection operation is improper, not only the leakage cannot be effectively controlled, but also the situation may be exacerbated, leading to greater safety hazards.

[0004] Therefore, aiming at the leakage problem that may be encountered by full pressure type liquefied hydrocarbon storage tank in the operation process, how to optimize the water injection mode and improve the safety and rapid effectiveness of water injection operation to respond to leakage quickly has become a technical problem to be solved urgently. UTILITY MODEL CONTENTS

[0005] According to the above deficiencies in the prior art, the utility model aims to provide a full pressure type liquefied hydrocarbon storage tank automatic water injection device, which significantly improves the safety and rapid response ability of full pressure type liquefied hydrocarbon storage tank under emergency condition by optimizing the water injection mode and control system design, effectively prevents the overrunning of liquid level, reduces the accident risk, and provides a strong guarantee for the leakage prevention technology of full pressure type liquefied hydrocarbon storage tank.

[0006] The utility model is realized by adopting the following technical solutions:

[0007] The automatic water injection device for the full-pressure liquefied hydrocarbon storage tank comprises a full-pressure liquefied hydrocarbon storage tank, a feed pipeline connected to the bottom of the full-pressure liquefied hydrocarbon storage tank, a manual valve one, a liquid level emergency shut-off valve and a material emergency shut-off valve arranged on the feed pipeline in sequence from the end close to the full-pressure liquefied hydrocarbon storage tank, a water injection pipeline connected between the liquid level emergency shut-off valve and the material emergency shut-off valve, a manual valve two arranged on the water injection pipeline at a minimum distance close to a water injection point, a remote control valve one, a check valve one, a manual valve three, a manual valve four, a remote control valve two, a check valve two and a special water injection pump arranged on the water injection pipeline in sequence after the manual valve two, an electric heating belt wound on the outer wall of the water injection pipeline for preventing the pipeline from freezing at low temperature, and thermal insulation cotton wrapped on the outer side of the electric heating belt for reducing heat loss and improving thermal insulation effect.

[0008] The remote control valve one and the remote control valve two are remote control valves with manual functions.

[0009] The water injection point is arranged on the feed pipeline of the full-pressure liquefied hydrocarbon storage tank and located before the liquid level emergency shut-off valve and the material emergency shut-off valve, so that when the liquid level in the storage tank reaches a preset high high alarm value, the emergency shut-off valve can be quickly closed through an interlocking control system, thereby effectively preventing the liquid level from continuing to rise and exceeding the maximum allowable liquid level of the full-pressure liquefied hydrocarbon storage tank. On the water injection pipeline, the manual valve two is installed at a minimum distance close to the water injection point, and the remote control valve one, the check valve one, the manual valve three, the manual valve four, the remote control valve two, the check valve two and the special water injection pump are arranged in sequence after the manual valve two. The manual valve one, the manual valve two, the manual valve three and the manual valve four are kept in a normally open state in normal times, so that in an emergency, the remote control valve can be opened in an operation room or on site to complete the rapid water injection operation.

[0010] The outlet pressure of the special water injection pump is greater than the internal pressure of the automatic water injection device for the full-pressure liquefied hydrocarbon storage tank, so as to ensure that the water injection process can be smoothly carried out.

[0011] The check valve one is provided with pressure gauges before and after the check valve one for monitoring the pressure in the water injection pipeline. When the pressure gauges show pressure, it may mean that the check valve leaks or the remote control valve two on the water inlet side leaks, and the cause needs to be found out and timely maintenance needs to be carried out.

[0012] A drain is arranged between the remote control valve one and the check valve one, between the check valve one and the manual valve three, and between the manual valve four and the remote control valve two, so as to drain the accumulated liquid in the pipeline or carry out maintenance operation when needed.

[0013] The inlet of the water injection pipeline is connected to a fire water pool, so as to ensure the reliability and sufficiency of the water injection source.

[0014] The bottom outlet of the full-pressure liquefied hydrocarbon tank is also provided with a drain valve for discharging the accumulated liquid in the tank after repairing the leakage.

[0015] The control system is electrically connected with the liquid level emergency shut-off valve, the liquid level monitoring device, the material emergency shut-off valve, the remote control valve one, the remote control valve two, the special water injection pump, the pressure gauge and the gas monitoring device, so that the operator can also control the start and stop of the water injection operation in the operation room or on site through the remote control valve.

[0016] Compared with the prior art, the full-pressure liquefied hydrocarbon tank automatic water injection device has the following beneficial effects:

[0017] The full-pressure liquefied hydrocarbon tank automatic water injection device optimizes the water injection mode and the control system, significantly improves the safety and rapid response capability of the full-pressure liquefied hydrocarbon tank in an emergency, effectively prevents liquid level overrun and overpressure, and reduces the risk of accidents. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The full-pressure liquefied hydrocarbon tank automatic water injection device of the utility model has the advantages of optimizing the water injection mode and the control system, significantly improving the safety and rapid response capability of the full-pressure liquefied hydrocarbon tank in an emergency, effectively preventing liquid level overrun and overpressure, reducing the risk of accidents, meeting the safety regulations of setting the water injection point in front of the emergency shut-off valve, providing strong guarantee for disposing leakage and plugging leakage, and effectively enhancing the anti-freezing capability of the device through the electric heating band and the thermal insulation cotton wrapped on the outer wall of the water injection pipeline.

[0019] Figure: 1, full-pressure liquefied hydrocarbon tank; 2, feed pipeline; 3, manual valve one; 4, liquid level emergency shut-off valve; 5, material emergency shut-off valve; 6, water injection pipeline; 7, manual valve two; 8, remote control valve one; 9, check valve one; 10, manual valve three; 11, manual valve four; 12, remote control valve two; 13, check valve two; 14, special water injection pump; 15, liquid level monitoring device; 16, pressure gauge; 17, guide; 18, fire water pool; 19, drain valve; 20, electric heating band; 21, thermal insulation cotton; 22, gas monitoring device. DETAILED DESCRIPTION

[0020] In order to make the purpose and technical scheme of the utility model clearer and more understandable, the utility model will be further described in detail below with reference to the drawings.

[0021] Example 1

[0022] As Figure 1The automatic water injection device for full-pressure liquefied hydrocarbon storage tank is characterized in that the full-pressure liquefied hydrocarbon storage tank 1 is connected with a feed pipeline 2 at the bottom, a manual valve 1 3, a liquid level emergency cut-off valve 4 and a material emergency cut-off valve 5 are sequentially arranged on the feed pipeline 2 from the end close to the full-pressure liquefied hydrocarbon storage tank 1, a water injection pipeline 6 is connected between the liquid level emergency cut-off valve 4 and the material emergency cut-off valve 5, a manual valve 2 7 is arranged at the minimum distance close to the water injection point on the water injection pipeline 6, a remote control valve 1 8, a check valve 1 9, a manual valve 3 10, a manual valve 4 1 1, a remote control valve 2 1 2, a check valve 2 1 3 and a special water injection pump 1 4 are sequentially arranged after the manual valve 2 7, an electric heating belt 20 is wound on the outer wall of the water injection pipeline 6, and the electric heating belt 20 is covered with thermal insulation cotton 21 on the outside, a liquid level monitoring device 1 5 is arranged in the full-pressure liquefied hydrocarbon storage tank 1, and a gas monitoring device 22 is arranged outside the full-pressure liquefied hydrocarbon storage tank 1.

[0023] The remote control valve 1 8 and the remote control valve 2 1 2 are remote control valves with manual function.

[0024] The outlet pressure of the special water injection pump 1 4 is greater than the internal pressure of the automatic water injection device of the full-pressure liquefied hydrocarbon storage tank 1.

[0025] The check valve 1 9 is provided with a pressure gauge 1 6 before and after the check valve 1 9.

[0026] The remote control valve 1 8, the check valve 1 9, the check valve 1 9, the manual valve 3 10, the manual valve 4 1 1 and the remote control valve 2 1 2 are all provided with a guide 1 7.

[0027] The inlet of the water injection pipeline 6 is connected with a fire water pool 1 8.

[0028] The bottom outlet of the full-pressure liquefied hydrocarbon storage tank 1 is further provided with a drain valve 1 9.

[0029] The control system is electrically connected with the liquid level emergency cut-off valve 4 and the liquid level monitoring device 1 5 respectively, and is further electrically connected with the material emergency cut-off valve 5, the remote control valve 1 8, the remote control valve 2 1 2, the special water injection pump 1 4, the pressure gauge 1 6 and the gas monitoring device 22 respectively.

[0030] When working, the specific steps are as follows:

[0031] In normal operation, the full pressure liquefied hydrocarbon tank 1 receives material through the feed line 2, while the water injection line 6 is in a preset state, and the manual valve one 3, the manual valve two 7, the manual valve three 10 and the manual valve four 11 are all in the open state, ready to respond to the emergency water injection demand at any time. Through the electric heating tape 20 and the thermal insulation cotton 21 arranged on the water injection line 6, it is ensured that the water injection line 6 will not freeze in low temperature environment. The reading on the pressure gauge 16 is monitored by the control system. If the pressure gauge 16 shows abnormal pressure, it means that there is a valve leakage, and appropriate maintenance measures should be taken in time to ensure the normal operation of the water injection system.

[0032] When the gas monitoring device 22 detects a leak, the control system will automatically close the material emergency shut-off valve 5, and the operator in the operation room or the on-site personnel can start the remote control valve one 8, the remote control valve two 12 and the special water injection pump 14 to start the water injection operation, and the water from the fire water tank 18 is injected into the tank through the water injection line 6. During the water injection process, the check valve one 9 and the check valve two 13 ensure the one-way flow of water flow to prevent backflow. At the same time, the liquid level in the full pressure liquefied hydrocarbon tank 1 is monitored by the liquid level monitoring device 15, and when the liquid level rises to the preset high alarm value, a signal will be sent to the control system immediately, and the control system will automatically close the liquid level emergency shut-off valve 4 after receiving the signal to prevent the liquid level from rising continuously.

[0033] When the leakage point is successfully repaired, the accumulated liquid in the full pressure liquefied hydrocarbon tank 1 is discharged through the drain valve 19, and the accumulated liquid in the water injection line 6 is discharged through the drain line 17 or other necessary maintenance work is carried out. Through this series of work process, the automatic water injection device of the full pressure liquefied hydrocarbon tank 1 can effectively deal with the emergency situation such as leakage and ensure the safe operation of the tank.

Claims

1. A full containment liquid hydrocarbon storage tank automatic water injection device, characterized by, The application relates to a full-pressure liquefied hydrocarbon storage tank (1), the bottom of the full-pressure liquefied hydrocarbon storage tank (1) is connected with a feeding pipeline (2), a manual valve (3), a liquid level emergency cut-off valve (4) and a material emergency cut-off valve (5) are sequentially arranged on the feeding pipeline (2) from the end close to the full-pressure liquefied hydrocarbon storage tank (1), a water injection pipeline (6) is connected between the liquid level emergency cut-off valve (4) and the material emergency cut-off valve (5), a manual valve (7) is arranged on the water injection pipeline (6) at the minimum distance close to a water injection point, a remote control valve (8), a check valve (9), a manual valve (10), a manual valve (11), a remote control valve (12), a check valve (13) and a special water injection pump (14) are sequentially arranged behind the manual valve (7), an electric heating belt (20) is wound on the outer wall of the water injection pipeline (6), and the outer side of the electric heating belt (20) is covered with thermal insulation cotton (21); a liquid level monitoring device (15) is arranged in the full-pressure liquefied hydrocarbon storage tank (1), and a gas monitoring device (22) is arranged outside the full-pressure liquefied hydrocarbon storage tank (1).

2. The automatic water filling device for full pressure liquefied hydrocarbon storage tank according to claim 1, characterized by, Pressure gauges (16) are arranged in front of and behind the check valve (9).

3. The automatic water filling device for full pressure liquefied hydrocarbon storage tank according to claim 1, characterized by, Guides (17) are arranged between the remote control valve (8) and the check valve (9), the check valve (9) and the manual valve (10), the manual valve (11) and the remote control valve (12).

4. The automatic water filling device for full pressure liquefied hydrocarbon storage tank according to claim 1, characterized by The inlet of the water injection pipeline (6) is connected with a fire water pool (18).

5. The automatic water filling device for full pressure liquefied hydrocarbon storage tank according to claim 4, characterized by A drain valve (19) is further arranged at the bottom outlet of the full-pressure liquefied hydrocarbon storage tank (1).

6. The full containment liquefied hydrocarbon storage tank automatic water filling apparatus according to claim 1, characterized by, A control system is further included.

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