CN211574241U - Leak-free detection system for a sealing device with a collecting device - Google Patents
Leak-free detection system for a sealing device with a collecting device Download PDFInfo
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- CN211574241U CN211574241U CN201922225898.3U CN201922225898U CN211574241U CN 211574241 U CN211574241 U CN 211574241U CN 201922225898 U CN201922225898 U CN 201922225898U CN 211574241 U CN211574241 U CN 211574241U
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Abstract
A leakage detection system and method of exempting from for sealing device with collection device, including the sealing device who is used for loading or transmission volatile organic material, the sealing mechanism who seals is carried out through the barrier fluid in each sealed point department of sealing device, the feed liquor port of the barrier fluid feed liquor pipe of connection on the barrier fluid inlet in every sealing mechanism all passes through the liquid outlet of the total pipe coupling accumulator of barrier fluid feed liquor, the exit end of the high-pressure gas-liquid mixture body discharge pipe of connection on the high-pressure gas-liquid mixture body export in every sealing mechanism all is connected to ordinary pressure gas-liquid bin through high-pressure gas-liquid mixture body collection pipe connection, the drain pipe of ordinary pressure gas-liquid mixture body passes through the pump connection the accumulator inlet of accumulator, the gaseous state material discharge pipe of ordinary pressure gas-liquid mixture body connects the gaseous state material processing apparatus who is. The utility model discloses simple structure, easily operation, installation cost are low. The method can be applied to a system free from leakage detection.
Description
Technical Field
The utility model relates to a prevent leaking system. And more particularly to a leak free detection system for a seal having a collection device.
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 arranged between an upper flange and a lower flange 2, and a barrier liquid 4 which is fed from the outside and discharged again is arranged at the upper side and the lower side of the sealing mechanism 3 and can prevent the gaseous material in the material 1 from rapidly leaking. The pressure of the spacer fluid 4 is less 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; none of these other forms of seals (e.g., packing, gaskets, washers, and all static seals) that are not double-ended mechanical seals are subject to a leak detection.
Disclosure of Invention
The utility model aims to solve the technical problem that a leak testing system of being used for sealing device is provided to have collection device.
The utility model adopts the technical proposal that: the utility model provides a be used for sealing device exempt from to leak testing system with collection device, is including the sealing device who is used for loading or transmission volatile organic material, and sets up sealing device's each sealed point department carries out the sealing mechanism who seals through the spacer fluid, wherein, the pressure of spacer fluid is less than the pressure of material in the sealing device, every sealing mechanism in the feed liquor port of the spacer fluid feed liquor pipe of connection on the spacer fluid inlet all through the liquid outlet of the inside accumulator that is equipped with the spacer fluid of the total tube coupling of spacer fluid, connect every the exit end of the high-pressure gas-liquid mixture discharge pipe on the high-pressure gas-liquid mixture export in the sealing mechanism all is connected to the ordinary pressure gas-liquid mixture body gas-liquid mixture bin that is used for compiling the normal pressure spacer fluid after decomposing through high-pressure gas-liquid mixture body collection tube coupling, the drain pipe that is used for discharging the ordinary pressure spacer fluid after decomposing of ordinary And the liquid inlet is used for continuing circulation, and a gaseous material discharge pipe of the normal-pressure gas-liquid mixture storage tank, which is used for discharging the decomposed normal-pressure gaseous materials, is connected with a gaseous material treatment device which is used for collecting and treating the gaseous materials.
And each high-pressure gas-liquid mixture discharge pipe is provided with a flowmeter.
And a pressure limiting valve used for adjusting the pressure of the gas-liquid mixture is arranged on the high-pressure gas-liquid mixture collecting pipeline close to the outlet.
And a first pressure gauge for displaying pressure is arranged on the inlet side of the pressure limiting valve on the high-pressure gas-liquid mixture collecting pipeline.
And a second pressure gauge for checking the pressure in the pressure accumulator is arranged on the pressure accumulator.
The accumulator is provided with an air supplementing pipe used for supplementing inert gas to the inside of the accumulator, and the air supplementing pipe is provided with a switch valve.
The utility model discloses a be used for sealing device exempt from to leak detection system with collection device, 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 sealing device with a collection device according to the present invention.
In the drawings
FI: flow meter PI 1: first pressure gauge
PI 2: second 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: normal pressure gas-liquid mixture storage box
12: the pump 13: liquid outlet pipe
14: gaseous material discharge pipe 15: gaseous material processing device
16: the pressure limiting valve 17: air supplement pipe
18: the switching valve 19: liquid inlet of pressure accumulator
Detailed Description
The present invention will be described in detail with reference to the following embodiments and accompanying drawings.
The utility model discloses a be used for sealing device exempt from to leak detection system with collection device is to a plurality of sealed points (non-double mechanical seal) of other forms like: the packing, the gasket and all static sealing points establish a sealing isolation liquid and enable the pressure to be lower than the process pressure, equipment and pipeline components provided with a sealing point (non-double-end mechanical seal) failure detection and alarm system, and a system and a method for installing a VOCs waste gas collection system and collecting and conveying leaked VOCs to process implementation and meeting GB37822-2019 for detecting the leakage-free system and method.
As shown in fig. 3, the leakage-free detection system with collection device for sealing device of the present invention comprises a sealing device 5 for loading or transporting the 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, namely, the pressure of the isolation liquid 4 is slightly smaller than that of the material 1, so that the pressure difference between the isolation liquid and the material 1 is reduced, and 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 material pollution (the purity of the material is reduced) caused by the leakage of a trace amount of the isolation liquid 4 into the material 1 is avoided. The liquid inlet ports of the isolating liquid inlet pipes 41, 42 and … … 4i … … 4n connected to the isolating liquid inlet of each sealing mechanism 3 are connected with the liquid outlet of the pressure accumulator 7 internally provided with isolating liquid 4 through an isolating liquid inlet main pipeline 6, and the pressure accumulator 7 is provided with a second pressure gauge PI2 used for checking the pressure in the pressure accumulator 7. The pressure accumulator 7 is provided with an air supply pipe 17 for supplying inert gas to the inside of the pressure accumulator 7, and the air supply pipe 17 is provided with a switch valve 18. Outlet ends of high-pressure gas-liquid mixture discharge pipes 91, 92 and … … 9i … … 9n connected to high-pressure gas-liquid mixture outlets 81, 82 and … … 8i … … 8n of each sealing mechanism 3 are connected to a normal-pressure gas-liquid mixture storage tank 11 for collecting and decomposing high-pressure gas-liquid mixture through a high-pressure gas-liquid mixture collecting pipeline 10, and each high-pressure gas-liquid mixture discharge pipe 91, 92 and … … 9i … … 9n is provided with a flow meter FI.
A pressure limiting valve 16 for adjusting the pressure of the gas-liquid mixture is arranged on the high-pressure gas-liquid mixture collecting pipeline 10 near the outlet. A first pressure gauge PI1 for displaying pressure is arranged on the high-pressure gas-liquid mixture collecting pipeline 10 on the inlet side of the pressure limiting valve 16.
The drain pipe 13 that is used for discharging the normal pressure buffer fluid after the decomposition of normal pressure gas-liquid mixture bin 11 passes through pump 12 and connects the accumulator inlet 19 of accumulator 7 for continue the circulation, the gaseous state material discharge pipe 14 that is used for discharging the normal pressure gaseous state material after the decomposition of normal pressure gas-liquid mixture bin 11 is connected and is used for collecting the gaseous state material processing apparatus 15 who handles gaseous state material.
The utility model discloses a be used for sealing device with collection device, be a totally closed device that a plurality of sealed points to equipment and pipeline subassembly constitute, be equipped with in every sealed point department and carry out the sealing mechanism sealed through the spacer fluid, the pressure of spacer fluid is less than the pressure of the material in the sealing device, collect a normal pressure gas-liquid mixture bin with a plurality of sealing mechanism exhaust high-pressure gas-liquid mixture through a main pipeline in, decompose in normal pressure gas-liquid mixture bin, and the normal pressure gaseous state material after will decomposing carries among the gaseous state material processing apparatus. Because the pressure of the isolation liquid 4 is slightly less than the pressure 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, the rapid leakage of the material can be avoided, meanwhile, the phenomenon that the isolation liquid leaks a small amount of floor into the material to pollute the material (reduce the purity of the material) is also avoided, a small amount of gas material leaked out of the sealing device is not emitted into the atmosphere, but the gas material is completely recovered and conveyed into the gaseous material processing device by the flowing isolation liquid, and therefore zero emission is achieved.
Claims (6)
1. The leakage-free detection system with the collection device for the sealing device 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 port of a pressure accumulator (7) internally provided with the isolation liquid (4) through an isolation liquid inlet main pipeline (6), and a high-pressure gas-liquid mixture outlet pipe (91, a high-pressure gas-liquid mixture outlet pipe (81, 82, … … 8i … … 8n) connected to a high-pressure gas-liquid mixture outlet (81, 82, … … i 638 n) in each sealing mechanism (3), 92. … … 9i … … 9n) is connected to the normal pressure gas-liquid mixture storage tank (11) that is used for compiling and decomposing the high pressure gas-liquid mixture through high pressure gas-liquid mixture collection pipeline (10), the drain pipe (13) that is used for discharging the normal pressure buffer fluid after decomposing of normal pressure gas-liquid mixture storage tank (11) is connected through pump (12) the accumulator inlet (19) of accumulator (7) for continue the circulation, the gaseous material discharge pipe (14) that is used for discharging the normal pressure gaseous material after decomposing of normal pressure gas-liquid mixture storage tank (11) are connected and are used for collecting the gaseous material processing apparatus (15) of handling the gaseous material.
2. The leak-free detection system for a sealing device with a collecting device 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 with collection device for sealing device according to claim 1, characterized in that a pressure limiting valve (16) for regulating the pressure of the gas-liquid mixture is provided on the high-pressure gas-liquid mixture collection line (10) near the outlet.
4. The leak-free detection system for a sealing device with a collecting device according to claim 3, characterized in that a first pressure gauge (PI1) for indicating the pressure is arranged on the high-pressure gas-liquid mixture collecting line (10) on the inlet side of the pressure limiting valve (16).
5. The leak-free detection system with collection device for a sealing device as claimed in claim 1, characterized in that a second pressure gauge (PI2) for checking the pressure in the pressure accumulator (7) is arranged on the pressure accumulator (7).
6. The leak-free detection system with a collecting device for a sealing device according to claim 1, characterized in that the pressure accumulator (7) is provided with a gas supply pipe (17) for supplying inert gas to the interior of the pressure accumulator (7), and the gas supply pipe (17) is provided with a switch valve (18).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922225898.3U CN211574241U (en) | 2019-12-11 | 2019-12-11 | Leak-free detection system for a sealing device with a collecting device |
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| CN201922225898.3U CN211574241U (en) | 2019-12-11 | 2019-12-11 | Leak-free detection system for a sealing device with a collecting device |
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| CN211574241U true CN211574241U (en) | 2020-09-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110906003A (en) * | 2019-12-11 | 2020-03-24 | 天津长瑞大通流体控制系统有限公司 | Leak-free detection system and method for a sealing device with a collecting device |
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2019
- 2019-12-11 CN CN201922225898.3U patent/CN211574241U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110906003A (en) * | 2019-12-11 | 2020-03-24 | 天津长瑞大通流体控制系统有限公司 | Leak-free detection system and method for a sealing device with a collecting device |
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