CN218349744U - Leakage detection device of heat exchanger matched with system for preparing methanol from natural gas - Google Patents
Leakage detection device of heat exchanger matched with system for preparing methanol from natural gas Download PDFInfo
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- CN218349744U CN218349744U CN202222733142.1U CN202222733142U CN218349744U CN 218349744 U CN218349744 U CN 218349744U CN 202222733142 U CN202222733142 U CN 202222733142U CN 218349744 U CN218349744 U CN 218349744U
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Abstract
The utility model provides a leak hunting device of supporting heat exchanger of natural gas system methyl alcohol system, includes return water house steward, air duct, the water storage container that extends along the horizontal direction, the upper reaches end of air duct sets up at the top of return water house steward, and upwards extends, the air duct has set gradually first stop valve, flow control valve, atmospheric valve from the upper reaches to downstream, the top of water storage container is provided with exhaust hole and moisturizing hole, and seals through the plug respectively, and the bottom of water storage container sets up leads the shower valve, and it has water to annotate in the water storage container, the low reaches end of air duct extends into the water storage container in, is located the below of water level. The utility model has the advantages of being simple in structure and convenient in operation, can high-efficiently confirm the leakage condition of heat exchanger technology gas and let out leakage quantity, provide instructive information to adding germicide dosage and whether parking is handled.
Description
Technical Field
The utility model relates to a chemical industry field, in particular to natural gas system methyl alcohol system supporting heat exchanger's leak hunting device.
Background
Chemical enterprises utilize a natural gas methanol preparation system to be matched with a large number of heat exchangers. These heat exchangers use circulating water as a cooling medium for cooling natural gas, synthesis gas, etc., and are used as process gas. Due to the problems of material and/or circulating water corrosion of the heat exchanger, leakage of the heat exchanger is easy to occur, and process gas enters a circulating water system through a water return header pipe.
On one hand, if the process gas is not found in time after entering the circulating water system, a large amount of microorganisms are bred, so that a large amount of microorganism slime is generated, and the corrosion and heat exchange are further carried out; on the other hand, the yield of methanol is reduced after process gas leakage, and the shutdown treatment is needed in severe cases, and the one-time startup and shutdown cost is about several million yuan.
At present, the leakage condition of the process gas can be confirmed only by observing whether the cold medium bubbles or not, the leakage quantity of the process gas cannot be confirmed, and further whether the shutdown treatment is required or not cannot be determined.
Therefore, how to design a leak detection device capable of determining the process gas leakage condition and the leakage amount of the matched heat exchanger is a problem to be solved urgently by a person skilled in the art.
Disclosure of Invention
The utility model aims at prior art's is not enough, provides a natural gas system methyl alcohol system supporting heat exchanger's leak hunting device, and its simple structure, convenient operation can high-efficiently confirm the leakage condition of heat exchanger process gas and let out leakage quantity, provide guiding information to adding germicide dosage and whether parking is handled.
The technical scheme of the utility model is that: the utility model provides a leak hunting device of supporting heat exchanger of natural gas system methyl alcohol system, includes return water house steward, air duct, the water storage container that extends along the horizontal direction, the upper reaches end of air duct sets up at the top of return water house steward, and upwards extends, the air duct has set gradually first stop valve, flow control valve, atmospheric valve from the upper reaches to downstream, the top of water storage container is provided with exhaust hole and moisturizing hole, and seals through the plug respectively, and the bottom of water storage container sets up leads the shower valve, and it has water to annotate in the water storage container, the low reaches end of air duct extends into the water storage container in, is located the below of water level.
The gas-guide tube is a stainless steel tube.
And the air duct is also provided with a second stop valve which is positioned at the downstream of the emptying valve.
And the air duct is also provided with a pressure gauge which is positioned between the first stop valve and the second stop valve.
The downstream end of the air duct is positioned at the bottom of the water storage container.
The downstream end of the air duct extends vertically downwards into the water storage container.
Adopt above-mentioned technical scheme to have following beneficial effect:
1. the leakage detection device of the heat exchanger matched with the natural gas methanol preparation system comprises a water return main pipe, an air guide pipe and a water storage container, wherein the water return main pipe extends along the horizontal direction, and the water return main pipe is used for collecting circulating water cooling media of all heat exchangers matched with the natural gas methanol preparation system and returning the circulating water cooling media to the circulating water system for recycling after cooling. The upper end of the gas guide pipe is arranged at the top of the water return main pipe and extends upwards, and as the process gas (including natural gas and synthetic gas) leaked by the matched heat exchanger is insoluble in water, the leaked process gas is converged in the upper space (the lower space is water) of the water return main pipe extending along the horizontal direction and enters the gas guide pipe under the self pressure. The air duct is provided with a first stop valve, a flow regulating valve and an emptying valve from upstream to downstream in sequence, under the normal condition, the first stop valve is in a closed state, the tightness of a water return header pipe is kept, during daily inspection, the first stop valve and the emptying valve can be opened by the aid of the air duct, whether the emptying valve is exhausted or not is detected, whether the heat exchanger has a leakage condition or not is preliminarily judged, if no gas is exhausted, the heat exchanger does not have the leakage condition, if gas is exhausted, the heat exchanger has the leakage condition, and the leaked heat exchanger can be further determined by analyzing components of the gas. The top of the water storage container is provided with an exhaust hole and a water replenishing hole which are respectively sealed through a rubber plug, the bottom of the water storage container is provided with a pilot shower valve, water is filled in the water storage container, the downstream end of the air guide tube extends into the water storage container and is positioned below the water level, after the leakage condition of the heat exchanger is determined, the air release valve is closed, the pilot shower valve is opened, water in the water storage container is discharged by utilizing an air discharge method, the process gas leakage amount of the heat exchanger is determined through the water discharge volume and the discharge time, the bactericide of a circulating water system can be timely added according to the information, the growth of microorganisms is inhibited, the heat exchanger is prevented from being further corroded, whether the matched heat exchanger needs to be stopped for treatment or not can be judged according to the monitoring of the leakage amount, and the start-stop cost is effectively saved.
2. Still be provided with the second stop valve on the air duct, be located the low reaches of atmospheric valve, separate atmospheric valve and water container, when daily patrolling and examining, first stop valve, atmospheric valve are opened to the accessible, and close the second stop valve, improve the leak hunting accuracy of heat exchanger. The air guide pipe is also provided with a pressure gauge which is positioned between the first stop valve and the second stop valve, and when the air guide pipe is used for daily inspection, the pressure parameter is matched with the displacement of the emptying valve, so that the leak detection accuracy of the heat exchanger is improved.
The following further description is made with reference to the accompanying drawings and detailed description.
Drawings
Fig. 1 is a schematic connection diagram of the present invention.
In the attached drawing, 1 is a return water manifold, 2 is a gas guide pipe, 3 is a water storage container, 31 is an exhaust hole, 32 is a water supplementing hole, 33 is a guiding and sprinkling valve, 4 is a first stop valve, 5 is a flow regulating valve, 6 is an emptying valve, 7 is a second stop valve, and 8 is a pressure gauge.
Detailed Description
Referring to fig. 1, a specific embodiment of a leak detection device for a heat exchanger associated with a system for preparing methanol from natural gas is shown. The leakage detection device of the heat exchanger matched with the natural gas methanol preparation system comprises a water return header pipe 1, an air guide pipe 2 and a water storage container 3, wherein the water return header pipe extends along the horizontal direction, the water return header pipe is used for collecting circulating water cooling media of all heat exchangers matched with the natural gas methanol preparation system, the circulating water cooling media return to the circulating water system and are recycled after being cooled, process gases (including natural gas and synthetic gas) leaked by the matched heat exchanger are insoluble in water, the leaked process gases are collected in the upper space of the water return header pipe extending along the horizontal direction, and the lower space is returned heat-exchanged circulating water. The upstream end setting of air duct is at return water manifold's top, and upwards extends, also promptly, is arranged in the process gas of return water manifold upper portion space gets into in the air duct under self pressure effect. The gas guide pipe 2 is made of stainless steel pipes, a first stop valve 4, a flow regulating valve 5, an emptying valve 6 and a second stop valve 7 are sequentially arranged from upstream to downstream, and a pressure gauge 8 is arranged between the first stop valve and the flow regulating valve 5. The top of water storage container 3 is provided with exhaust hole 31 and moisturizing hole 32, and seals through the plug respectively, and the bottom of water storage container 3 sets up leads drenching valve 33, and it has water to add the notes in the water storage container 3, the low reaches end of air duct 2 extends into water storage container 3, is located the below of water level, and is specific, and the low reaches end of air duct 2 extends into water storage container 3 vertically downwards, is located water storage container's bottom.
The utility model discloses to the leak hunting principle of the supporting heat exchanger of natural gas system methyl alcohol system does: when daily patrolling and examining, first stop valve, atmospheric valve are opened to the accessible, close the second stop valve, detect the atmospheric valve and whether have gas outgoing, and the atmospheric pressure that the cooperation manometer shows preliminarily judges whether there is the leakage condition in the heat exchanger, if no gas outgoing, and the manometer shows for the ordinary pressure, then the heat exchanger does not have the leakage condition, if there is gas outgoing, and the manometer shows that pressure is greater than atmospheric pressure, then the heat exchanger has the leakage condition. By analyzing the composition of the gas, the heat exchanger that is leaking can be further identified. And when the leakage condition of the heat exchanger is determined, closing the emptying valve, opening the first stop valve, the second stop valve and the pilot valve, discharging the process gas with pressure formed by leakage in the return water main pipe into the water storage container through the gas guide pipe, discharging water in the water storage container by using an air discharge method, and determining the process gas leakage amount of the heat exchanger through the water discharge volume and the discharge time. According to the information, the circulating water system bactericide can be added in time to inhibit the growth of microorganisms and avoid the further corrosion of the heat exchanger, and whether the matched heat exchanger needs to be stopped or not can be judged according to the monitoring of the leakage amount, so that the starting and stopping cost is effectively saved.
Claims (6)
1. The utility model provides a leak hunting device of supporting heat exchanger of natural gas system methyl alcohol system which characterized in that: comprises a backwater main pipe (1) extending along the horizontal direction, an air duct (2) and a water storage container (3),
the upstream end of the gas-guide tube (2) is arranged at the top of the water return main pipe (1) and extends upwards,
the air duct (2) is provided with a first stop valve (4), a flow regulating valve (5) and an emptying valve (6) from upstream to downstream in sequence,
the top of water storage container (3) is provided with exhaust hole (31) and moisturizing hole (32), and seals through the plug respectively, and the bottom of water storage container (3) sets up leads and drenches valve (33), and it has water to add the notes in water storage container (3), the low reaches end of air duct (2) extends into water storage container (3), is located the below of water level.
2. The leak detection device for the heat exchanger matched with the system for preparing methanol from natural gas according to claim 1, which is characterized in that: the gas guide pipe (2) is a stainless steel pipe.
3. The leak detection device for the heat exchanger matched with the system for preparing methanol from natural gas according to claim 1, which is characterized in that: and the air duct (2) is also provided with a second stop valve (7) which is positioned at the downstream of the emptying valve (6).
4. The leak detection device for the heat exchanger matched with the system for preparing methanol from natural gas according to claim 3, which is characterized in that: and the air guide pipe (2) is also provided with a pressure gauge (8) which is positioned between the first stop valve (4) and the second stop valve (7).
5. The leak detection device for the heat exchanger matched with the system for preparing methanol from natural gas according to claim 1, which is characterized in that: the downstream end of the air duct (2) is positioned at the bottom of the water storage container (3).
6. The leak detection device for the heat exchanger matched with the system for preparing methanol from natural gas according to claim 1, which is characterized in that: the downstream end of the air duct (2) vertically extends downwards into the water storage container (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222733142.1U CN218349744U (en) | 2022-10-13 | 2022-10-13 | Leakage detection device of heat exchanger matched with system for preparing methanol from natural gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222733142.1U CN218349744U (en) | 2022-10-13 | 2022-10-13 | Leakage detection device of heat exchanger matched with system for preparing methanol from natural gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218349744U true CN218349744U (en) | 2023-01-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222733142.1U Active CN218349744U (en) | 2022-10-13 | 2022-10-13 | Leakage detection device of heat exchanger matched with system for preparing methanol from natural gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218349744U (en) |
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2022
- 2022-10-13 CN CN202222733142.1U patent/CN218349744U/en active Active
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