CN211526097U - Leakage-free detection system for sealing device with alarm function - Google Patents
Leakage-free detection system for sealing device with alarm function Download PDFInfo
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- CN211526097U CN211526097U CN201922225899.8U CN201922225899U CN211526097U CN 211526097 U CN211526097 U CN 211526097U CN 201922225899 U CN201922225899 U CN 201922225899U CN 211526097 U CN211526097 U CN 211526097U
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Abstract
The utility model provides a be used for having sealing device's of reporting to police leak detection system of exempting from, there is the sealing device who is used for loading or transmitting volatile organic material, the sealing mechanism who seals is carried out through the spacer fluid to each sealed point department that sets up at sealing device, the pressure of spacer fluid is less than the pressure of material in the sealing device, the feed liquor port of the spacer fluid feed liquor pipe of connection on the spacer fluid feed liquor in every sealing mechanism all passes through the liquid outlet of the total pipe coupling accumulator of spacer fluid feed liquor, the exit end of the high-pressure gas-liquid mixture discharge pipe of connection on the high-pressure gas-liquid mixture export in every sealing mechanism all collects the high-pressure gas-liquid mixture entry of pipe coupling to accumulator through high-pressure gas-liquid mixture, the blast pipe that sets up on the accumulator. The utility model discloses simple structure, easily operation, installation cost are low. The method can be applied to a system for preventing leakage detection of sealing points (non-double-end mechanical seal) of oil refineries, chemical plant equipment and pipeline components.
Description
Technical Field
The utility model relates to an avoid leakage detection system. And more particularly to a leak free detection system for a seal having an alarm.
Background
To date, only devices with double mechanical seal assemblies have been free of leak detection systems in oil refineries, chemical plant equipment and pipeline assembly sealing points worldwide. Other seals are as follows: packing, gaskets, washers, and all static seals are not immune to leak detection.
As shown in fig. 1 and 2 and disclosed in the patent application "sealing structure and sealing method of high pressure liquid or gas barrier type flange" of invention with application number 2018107591814, a non-mechanical sealing mechanism 3 is provided between the upstream and downstream flanges 2, and a spacer liquid 4 capable of preventing leakage of gaseous materials in the material 1 is provided to be fed from the outside and discharged again through both the upstream and downstream sides of the sealing mechanism 3. The pressure of the spacer fluid 4 is slightly greater than the pressure of the gaseous material.
Strict regulations are set for the unorganized emission control of volatile organic compounds, such as page 8 in the volatile organic compound unorganized emission control standard GB37822-2019 (implemented by 2019-07-01):
8.3.2 the equipment and pipeline assembly meets one of the following conditions, which can avoid leakage detection:
a. in a normal working state, the system is in a negative pressure state;
b. adopting a canned motor pump, a magnetic pump, a diaphragm pump, a bellows pump, a double-end mechanical seal pump with the pressure of the sealing isolation liquid higher than the process pressure or a pump with the same efficiency;
c. adopting a shielding compressor, a magnetic compressor, a diaphragm compressor, a double-end mechanical sealing compressor with the pressure of sealing isolation liquid higher than the process pressure or a compressor with the same efficiency;
d. adopting a shielding stirrer, a magnetic stirrer, a double-end mechanical seal stirrer with the pressure of the sealing isolation liquid higher than the process pressure or a stirrer with the same function;
e. adopting a shielding valve, a diaphragm valve, a corrugated pipe valve or a valve with the same equivalent function, and a pressure release valve with an upstream provided with a rupture disk;
f. equipment and pipeline components equipped with a seal failure detection and alarm system;
g. invasive (semi-invasive) pumps and other devices and pipeline components that cannot be measured due to invasion or burying under the ground and pipeline insulation;
h. a VOCs waste gas collecting system is installed, and leaked VOCs can be collected and conveyed to be treated and implemented;
i. other equivalent measures are taken.
A plurality of sealing points exist in oil refining and chemical enterprises, the sealing points are often leaked, if the leakage amount is large, pollution is caused, and safety production (materials are flammable and explosive), occupational health (materials are toxic and harmful), energy conservation (material loss), cost (investment increase) and the like are also accompanied. Therefore, the national standard requires that all sealing points of equipment and pipeline components are managed, and leakage detection, repair, re-detection and re-repair are carried out periodically and repeatedly. The device can be free from detection and repair unless meeting volatile organic compound unorganized emission control standard GB37822-2019 item 8.3.2, but at present, no technology and method for online detection and alarm of sealing failure of a sealing point of each non-double-end mechanical seal exists, and equipment and pipeline components of a sealing point sealing failure detection and alarm system for each non-double-end mechanical seal cannot be equipped; and the VOCs waste gas collecting system leaked from each sealing point of the equipment and pipeline assembly cannot be installed, and the leaked VOCs can be collected and conveyed to be treated and implemented; other types of seals than double mechanical seals (e.g., packing, gaskets, washers, and all static seals) are not subject to leakage detection.
Disclosure of Invention
The utility model aims to solve the technical problem that a leak testing system of being exempted from for having the sealing device of warning is provided.
The utility model adopts the technical proposal that: the utility model provides a be used for having sealing device's of warning leak testing exempts from, is including the sealing device who is used for loading or transmission volatile organic material, and sets up each sealing point department of sealing device carries out the sealing mechanism that seals through the spacer fluid, wherein, the pressure of spacer fluid is less than the pressure of material in the sealing device, every the inlet port of the spacer fluid feed pipe of connection on the spacer fluid inlet in the sealing mechanism all connect the liquid outlet of the inside accumulator that is equipped with the spacer fluid through the total pipeline of spacer fluid feed, connect every the exit end of the high-pressure gas-liquid mixture discharge pipe on the high-pressure gas-liquid outlet in the sealing mechanism all is connected to the high-pressure gas-liquid mixture entry of accumulator through high-pressure gas-liquid mixture collection pipeline, the blast pipe that is used for discharging the gaseous state material after the decomposition that sets up at the accumulator top connects the gaseous state material processing apparatus who is used for collecting the processing gaseous, the decomposed spacer fluid enters the sealing mechanism through a spacer fluid inlet main pipeline connected to a fluid outlet of the pressure accumulator to continue to circulate.
And each high-pressure gas-liquid mixture discharge pipe is provided with a flowmeter.
And a pump for driving the high-pressure gas-liquid mixture to flow is arranged on the high-pressure gas-liquid mixture collecting pipeline close to the pressure accumulator.
The pressure accumulator is provided with a pressure gauge for checking the pressure in the pressure accumulator.
The pressure accumulator is provided with a spacer fluid replenishing pipe for replenishing spacer fluid to the inside, and the spacer fluid replenishing pipe is provided with a switch valve.
The pressure limiting valve is connected with an alarm device which gives an alarm when the pressure in the exhaust pipe exceeds the set pressure.
The utility model discloses a be used for having sealing device's of reporting to police leak detection system of exempting from, simple structure, easily operation, installation cost are low. The method can be applied to a system for preventing leakage detection of sealing points (non-double-end mechanical seal) of oil refineries, chemical plant equipment and pipeline components. The utility model has the advantages of as follows:
1. emission reduction, no leakage and no pollution;
2. energy is saved, the conversion rate of the raw materials into products is improved, and the energy is saved and not wasted;
3. the material is flammable and explosive, and explosion and fire accidents can be avoided without leakage;
4. health, the materials are all toxic and harmful substances, and can induce various diseases;
5. the trouble is saved, the leakage detection is avoided, and the labor is saved if the leakage detection and the repair are avoided;
6. the data is real and reliable, and the robot is used for replacing a human for detection, so that no thought factor exists;
7. simple structure, easy operation and low installation cost.
Drawings
FIG. 1 is a schematic structural view of a prior art non-mechanical sealing mechanism;
FIG. 2 is an enlarged view of a portion of FIG. 1;
fig. 3 is a schematic diagram of a leak free detection system for a seal with alarm.
In the drawings
FI: and (4) flow meter PI: pressure gauge
1: material 2: upstream and downstream flanges
3: the sealing mechanism 4: spacer fluid
41. 42, … … 4i … … 4 n: spacer fluid feed liquor pipe 5: sealing device
6: a main isolating liquid inlet pipeline 7: pressure accumulator
81. 82, … … 8i … … 8 n: high-pressure gas-liquid mixture outlet
91. 92, … … 9i … … 9 n: high-pressure gas-liquid mixture discharge pipe
10: high-pressure gas-liquid mixture collecting pipeline 11: high-pressure gas-liquid mixture inlet
12: the pump 13: exhaust pipe
14: the pressure limiting valve 15: gaseous material processing device
16: spacer fluid replenishing pipe 17: switch valve
18: alarm device
Detailed Description
The following provides a detailed description of a leak-free detection system for a seal device with alarm according to the present invention with reference to the accompanying drawings.
The utility model discloses a be used for having sealing device's of warning leak detection system of exempting from is to a plurality of sealed points (non-double mechanical seal) of other forms like: the packing, gasket, washer and all static seal points establish a seal spacer fluid and make the pressure to which it is subjected lower than the process pressure, equipment and pipeline components equipped with a seal point (non-double-end mechanical seal) failure detection and alarm system, and a leak-free detection system and method that install a VOCs waste gas collection system and can capture and transport leaked VOCs to process implementation and that comply with GB 37822-2019.
As shown in fig. 3, the present invention relates to a leakage-free detection system for a sealing device with alarm, which comprises a sealing device 5 for loading or transporting a volatile organic material 1, and a sealing mechanism 3 disposed at each sealing point of the sealing device 5 and sealed by a spacer fluid 4, wherein the spacer fluid 4 is a liquid immiscible with the material 1 under normal pressure. The pressure of the isolation liquid is smaller than that of the material 1 in the sealing device 5, the pressure difference between the isolation liquid and the material 1 is reduced, the pressure difference is in direct proportion to the leakage speed, so that the rapid leakage of the material 1 can be avoided, and meanwhile, the phenomenon that the isolation liquid 4 leaks into the material 1 in a small amount to pollute the material (reduce the purity of the material) is avoided. The liquid inlet ports of the isolating liquid inlet pipes 41, 42 and … … 4i … … 4n connected with the isolating liquid inlet in each sealing mechanism 3 are connected with the liquid outlet of the pressure accumulator 7 with normal pressure isolating liquid 4 inside through an isolating liquid inlet main pipeline 6, the outlet ends of the high-pressure gas-liquid mixture outlet pipes 91, 92 and … … 9i … … 9n connected with the high-pressure gas-liquid mixture outlets 81, 82 and … … 8i … … 8n in each sealing mechanism 3 are connected with the high-pressure gas-liquid mixture inlet 11 of the pressure accumulator 7 through a high-pressure gas-liquid mixture collecting pipeline 10, the high-pressure gas-liquid mixture collecting pipeline 10 is provided with a pump 12 for driving the high-pressure gas-liquid mixture to flow at a position close to the pressure accumulator 7, and each of the high-pressure gas-liquid mixture discharge pipes 91, 92 and … … 9i … … 9n is provided with a flow meter FI.
The exhaust pipe 13 which is arranged at the top end of the pressure accumulator 7 and used for discharging decomposed gaseous materials is connected with a gaseous material processing device 15 used for collecting and processing the gaseous materials through a pressure limiting valve 14, the pressure limiting valve 14 is used for adjusting the pressure in the exhaust pipe 13, and the pressure limiting valve 14 is connected with an alarm device 18 which gives an alarm when the pressure in the exhaust pipe 13 exceeds a set pressure. The alarm device 18 may be a buzzer or a display.
The decomposed spacer fluid 4 enters the sealing mechanism 3 through a spacer fluid inlet main pipeline 6 connected to a fluid outlet of the pressure accumulator 7 to continue circulation.
The pressure accumulator 7 is provided with a pressure gauge PI for checking the pressure in the pressure accumulator 7. The pressure accumulator 7 is also provided with a spacer fluid supplementing pipe 16 for supplementing spacer fluid to the inside, and the spacer fluid supplementing pipe 16 is provided with a switch valve 17.
The utility model discloses a be used for having sealing device's of warning leak detection system of exempting from, be to a totally closed device that comprises a plurality of sealed points of equipment and pipeline subassembly, be equipped with in every sealed point department and carry out sealed sealing mechanism through the spacer fluid, the pressure of spacer fluid is less than the pressure of the material in the sealing device, collect the accumulator through a total pipeline with a plurality of sealing mechanism exhaust high-pressure gas-liquid mixture in, decompose in the accumulator, alarm device reports to the police when accumulator internal pressure surpasss the settlement pressure, and carry gaseous material processing apparatus with the ordinary pressure gaseous material after the accumulator decomposes in. Namely, the pressure of the isolation liquid is slightly less than that of the material, the pressure difference between the isolation liquid and the material is reduced, and the pressure difference is in direct proportion to the leakage speed, so that the rapid leakage of the material can be avoided, and meanwhile, the phenomenon that the isolation liquid leaks into the material in a small amount to pollute the material (reduce the purity of the material) is also avoided. Along with the accumulation of the leaked materials, the pressure in the pressure accumulator is slowly increased, the alarm device immediately alarms when the pressure exceeds the set pressure so as to take corresponding measures, a small amount of gas materials leaked from the sealing device are not emitted into the atmosphere, the alarm device alarms and timely takes measures, and the gas materials 1 are completely recycled and conveyed into the gas material processing device 15 by virtue of flowing isolation liquid, so that zero emission is realized.
Claims (6)
1. The leakage-free detection system for the sealing device with the alarm function comprises sealing devices (5) used for loading or transmitting volatile organic materials (1) and sealing mechanisms (3) arranged at sealing points of the sealing devices (5) and sealed through isolation liquid (4), wherein the pressure of the isolation liquid is smaller than the pressure of the materials (1) in the sealing devices (5), and is characterized in that liquid inlet ports of isolation liquid inlet pipes (41, 42, … … 4i … … 4n) connected to liquid inlet ports of the isolation liquid in each sealing mechanism (3) are connected with a liquid outlet of a pressure accumulator (7) internally provided with the isolation liquid (4) through an isolation liquid inlet main pipeline (6), and high-pressure gas-liquid mixture outlet pipes (91, a high-pressure gas-liquid mixture outlet pipe (81, 82, … … 8i … … 8n) connected to high-pressure gas-liquid mixture outlets (81, 82, … … i … … n) in each sealing mechanism (3), 92. … … 9i … … 9n) is connected to through high-pressure gas-liquid mixture collection pipeline (10) the high-pressure gas-liquid mixture entry (11) of accumulator (7) sets up blast pipe (13) that are used for discharging gaseous state material after the decomposition on accumulator (7) top are connected through pressure limiting valve (14) and are used for collecting gaseous state material processing apparatus (15) of handling gaseous state material, and the buffer solution (4) after the decomposition gets into sealing mechanism (3) and continues the circulation through the total pipeline of buffer solution feed liquid (6) of connecting on accumulator (7) liquid outlet.
2. A leak-free detection system for a sealing device with alarm according to claim 1, characterized in that each of said high-pressure gas-liquid mixture discharge pipes (91, 92, … … 9i … … 9n) is provided with a flow meter (F1).
3. The leak-free detection system for a sealing device with an alarm as claimed in claim 1, characterized in that the high-pressure gas-liquid mixture collecting pipe (10) is provided with a pump (12) for driving the high-pressure gas-liquid mixture to flow near the pressure accumulator (7).
4. A leak-free detection system for a sealing device with alarm according to claim 1, characterized in that the pressure accumulator (7) is provided with a pressure gauge (PI) for checking the pressure in the pressure accumulator (7).
5. The leak-free detection system for a sealing device with alarm according to claim 1, characterized in that the pressure accumulator (7) is provided with a spacer fluid replenishing pipe (16) for replenishing spacer fluid to the inside, and the spacer fluid replenishing pipe (16) is provided with a switch valve (17).
6. A leak-free detection system for a sealing device with alarm according to claim 1, characterized in that an alarm device (18) for alarming when the pressure in the exhaust pipe (13) exceeds a set pressure is connected to the pressure limiting valve (14).
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| CN201922225899.8U CN211526097U (en) | 2019-12-11 | 2019-12-11 | Leakage-free detection system for sealing device with alarm function |
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| CN201922225899.8U CN211526097U (en) | 2019-12-11 | 2019-12-11 | Leakage-free detection system for sealing device with alarm function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110894910A (en) * | 2019-12-11 | 2020-03-20 | 天津长瑞大通流体控制系统有限公司 | Leakage-free detection system and method for sealing device with alarm |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110894910A (en) * | 2019-12-11 | 2020-03-20 | 天津长瑞大通流体控制系统有限公司 | Leakage-free detection system and method for sealing device with alarm |
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