Leakage detection system of heat exchange equipment for chemical industry

Abstract

The utility model relates to the technical field of heat exchanger leakage detection, in particular to a leakage detection system of heat exchange equipment for chemical engineering. Comprising a leakage real-time detection module, a leakage point positioning integrated detection module and a DCS control module. The leakage point positioning integrated detection module comprises a TOC on-line detection analyzer, a COD on-line detection analyzer, a PH value on-line detection analyzer, a turbidity on-line detection analyzer, a water-oil on-line detection analyzer, a sample collecting pipe, a pollution discharge collecting pipe, a high-pressure nitrogen pipe provided with an electromagnetic valve II and a plurality of sampling pipelines; one end of the sample collecting pipe is communicated with the high-pressure nitrogen pipe, and the other end of the sample collecting pipe is communicated with the pollution discharge collecting pipe through an electromagnetic valve I; and the tail end of the sewage discharge collecting pipe is communicated with the sewage pool. According to the utility model, the damaged heat exchanger can be accurately positioned, and equipment damage, circulating water quality deterioration and even serious safety accidents caused by leakage of the heat exchanger are prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchanger leakage detection, and particularly relates to a leakage detection system for a heat exchange device used in chemical industry. Background Technique

[0002] In industrial production such as oil refining, chemical industry, pharmacy, and energy, heat exchangers are often used to heat low-temperature fluids or cool high-temperature fluids, vaporize liquids into steam or condense steam into liquids. Heat exchangers are key unit devices in chemical production. According to statistics, the tonnage of heat exchangers accounts for 20% of the entire process equipment, and in some cases, even as high as 30%. Its importance is thus imaginable.

[0003] Once a heat exchanger leaks, it will cause equipment corrosion and scaling, excessive biological slime, increased energy consumption, and in severe cases, even threaten the safe and stable operation of the device. It not only affects the economy of production but also often directly threatens the safe operation of the main engine or equipment, and even causes serious equipment damage accidents and safety accidents. Content of the Utility Model

[0004] The utility model provides a leakage detection system for a heat exchange device used in chemical industry, aiming to solve the problems that the prior art cannot reflect the water quality of circulating water in real time and cannot effectively and accurately monitor the leaking heat exchanger, resulting in great potential safety hazards to the device production when leakage occurs.

[0005] To achieve the above object, the technical solution of the utility model is as follows:

[0006] The utility model provides a leakage detection system for a heat exchange device used in chemical industry, including a real-time leakage detection module, a leak point positioning integrated detection module, and a DCS control module;

[0007] The real-time leakage detection module is arranged on the return water main pipe;

[0008] The leakage point location integrated detection module includes a TOC on-line detection analyzer, a COD on-line detection analyzer, a pH value on-line detection analyzer, a turbidity on-line detection analyzer, a water-oil on-line detection analyzer, a sample collection pipe, a sewage collection pipe, a high-pressure nitrogen gas pipe provided with a solenoid valve II, and several sampling pipelines; the sample collection pipe is respectively communicated with the inlet ends of the TOC on-line detection analyzer, the COD on-line detection analyzer, the pH value on-line detection analyzer, the turbidity on-line detection analyzer, and the water-oil on-line detection analyzer, and the outlet ends of the TOC on-line detection analyzer, the COD on-line detection analyzer, the pH value on-line detection analyzer, the turbidity on-line detection analyzer, and the water-oil on-line detection analyzer are respectively communicated with the sewage collection pipe; one end of the sample collection pipe is communicated with the high-pressure nitrogen gas pipe, and the other end is communicated with the sewage collection pipe through a solenoid valve I; the end of the sewage collection pipe is communicated with a sewage tank; the sampling pipelines correspond to the heat exchangers one by one, one end of the sampling pipeline is communicated with the outlet end of the heat exchanger, and the other end is communicated with the sample collection pipe, and a sampling solenoid valve is arranged on the sampling pipeline;

[0009] The DCS control module is respectively connected with the leakage real-time detection module and the leakage point location integrated detection module.

[0010] Furthermore, the leakage real-time detection module includes a TOC on-line detection analyzer, a COD on-line detection analyzer, a pH value on-line detection analyzer, a turbidity on-line detection analyzer, and a water-oil on-line detection analyzer.

[0011] Furthermore, the leakage point location integrated detection module further includes a TOC detection branch, a TOC drainage branch, a COD detection branch, a COD drainage branch, a pH value detection branch, a pH value drainage branch, a turbidity detection branch, a turbidity drainage branch, a water-oil detection branch, and a water-oil drainage branch.

[0012] Furthermore, solenoid valves are arranged on the TOC detection branch, the COD detection branch, the pH value detection branch, the turbidity detection branch, and the water-oil detection branch.

[0013] Furthermore, check valves are arranged on the TOC drainage branch, the COD drainage branch, the pH value drainage branch, the turbidity drainage branch, and the water-oil drainage branch.

[0014] Furthermore, the sampling pipeline is communicated with one end of a quick loop upstream of the sampling solenoid valve, the other end of the quick loop is communicated with the sewage collection pipe, and a rotameter is arranged on the quick loop.

[0015] Furthermore, the leakage detection system further includes a temperature and pressure detection module.

[0016] Furthermore, the leakage detection system further includes several combustible and toxic gas analyzers.

[0017] Furthermore, the leakage detection system further includes a raw water make-up pipeline and a raw water make-up valve provided on the raw water make-up pipeline.

[0018] Furthermore, the leakage detection system further includes a pipeline to the sewage tank, and a total sewage treatment valve is provided on the pipeline to the sewage tank.

[0019] The beneficial effects achieved by the present utility model are as follows:

[0020] Through the leakage real-time detection module of the present utility model, leakage can be monitored in a timely manner, and the circulating water system can be switched in a timely manner to avoid the generation of dirt caused by the long-term circulation of contaminated water in the system, which affects the equipment. And through the integrated leakage point location detection module, the leakage source can be quickly found, and the damaged heat exchanger can be accurately located for subsequent replacement; it can prevent equipment damage caused by the leakage of the heat exchanger, resulting in the deterioration of the circulating water quality and even causing serious safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0023] Figure 2 It is a schematic diagram of the structure of the integrated leakage point location detection module of the present utility model.

[0024] In the figure, 10 is a leakage detection system; 110 is an integrated leakage point location detection module; 111 is a TOC on-line detection analyzer; 111a is a TOC detection branch; 111b is a TOC drainage branch; 111c is solenoid valve three; 111d is a check valve; 112 is a COD on-line detection analyzer; 112a is a COD detection branch; 112b is a COD drainage branch; 112c is solenoid valve four; 113 is a pH value on-line detection analyzer; 113a is a pH value detection branch; 113b is a pH value drainage branch; 113c is solenoid valve five; 114 is a turbidity on-line detection analyzer; 114a is a turbidity detection branch; 114b is a turbidity drainage branch; 114c is solenoid valve six; 115 is a water-oil on-line detection analyzer; 115a is a water-oil detection branch; 115b is a water-oil drainage branch; 115c is solenoid valve seven; 116 is a sample collection pipe; 116a is solenoid valve one; 117 is a sewage collection pipe; 118 is a high-pressure nitrogen gas pipe; 118a is solenoid valve two; 119 is a sampling pipeline; 119a is a sampling solenoid valve; 119b is a quick circuit; 119c is a rotameter; 120 is a real-time leakage detection module; 130 is a temperature and pressure detection module; 140 is a combustible and toxic gas analyzer; 150 is a raw water make-up pipeline; 151 is a raw water make-up valve; 160 is a pipeline to the sewage tank; 161 is a total sewage treatment valve; 170 is a DCS control module; 20 is a heat exchanger; 30 is a water supply main pipe; 310 is a total water supply valve; 320 is a water supply pump; 40 is a return water main pipe; 410 is a total return water valve; 50 is a cooling tower. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0026] It should be noted that if there are directional indications (such as up, down, left, right, front, back,...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0027] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel scenarios. Taking "A and / or B" as an example, it includes scenario A, or scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or is unable to be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0028] The present utility model provides a leakage detection system 10 for a heat exchange device used in the chemical industry, which is applied to the heat exchange circulation system of an existing chemical plant. The heat exchange circulation system includes a cooling tower 50, a water supply main pipe 30, a return water main pipe 40, and a plurality of heat exchangers 20; one end of the water supply main pipe 30 is connected to the cooling tower 50, and the other end is respectively connected to the plurality of heat exchangers 20 through branches; one end of the return water main pipe 40 is connected to the cooling tower 50, and the other end is respectively connected to the plurality of heat exchangers 20 through branches; a water supply main valve 310 and a water supply pump 320 are arranged near the end of the water supply main pipe 30 close to the cooling tower 50, and the water supply main valve 310 is arranged between the cooling tower 50 and the water supply pump 320; a return water main valve 410 is arranged near the end of the return water main pipe 40 close to the cooling tower 50.

[0029] During the heat exchange operation process, first, the water supply main valve 310 and the return water main valve 410 are opened, and then the water supply pump 320 is started. Water then flows out from the cooling tower 50, flows into the heat exchanger 20 along the water supply main pipe 30, and after heat exchange, flows back to the cooling tower 50 along the return water main pipe 40.

[0030] As Figures 1 to 2 shown, the leakage detection system 10 specifically includes a leakage real-time detection module 120, a leak point location integrated detection module 110, and a DCS control module 170;

[0031] The leakage real-time detection module 120 is arranged on the return water main pipe 40 and is used to preliminarily detect whether the heat exchanger 20 leaks;

[0032] The leakage point location integrated detection module 110 is used to accurately detect which heat exchanger 20 has a leakage. The leakage point location integrated detection module 110 includes a TOC on-line detection analyzer 111, a COD on-line detection analyzer 112, a pH value on-line detection analyzer 113, a turbidity on-line detection analyzer 114, a water-oil on-line detection analyzer 115, a sample collection pipe 116, a sewage collection pipe 117, a high-pressure nitrogen gas pipe 118 provided with a solenoid valve two 118a, and a plurality of sampling pipelines 119. The sample collection pipe 116 is respectively communicated with the inlet ends of the TOC on-line detection analyzer 111, the COD on-line detection analyzer 112, the pH value on-line detection analyzer 113, the turbidity on-line detection analyzer 114, and the water-oil on-line detection analyzer 115. The outlet ends of the TOC on-line detection analyzer 111, the COD on-line detection analyzer 112, the pH value on-line detection analyzer 113, the turbidity on-line detection analyzer 114, and the water-oil on-line detection analyzer 115 are respectively communicated with the sewage collection pipe 117. One end of the sample collection pipe 116 is communicated with the high-pressure nitrogen gas pipe 118, and the other end is communicated with the sewage collection pipe 117 through a solenoid valve one 116a. The end of the sewage collection pipe 117 is communicated with a sewage pool. The sampling pipelines 119 correspond to the heat exchangers 20 one by one. One end of the sampling pipeline 119 is communicated with the outlet end of the heat exchanger 20, and the other end is communicated with the sample collection pipe 116. A sampling solenoid valve 119a is provided on the sampling pipeline 119.

[0033] The DCS control module 170 is the control core of the present utility model and is respectively connected to the leakage real-time detection module 120, the leakage point location integrated detection module 110, the water supply main valve 310, and the return water main valve 410.

[0034] The leakage real-time detection module 120 includes a TOC on-line detection analyzer 111, a COD on-line detection analyzer 112, a pH value on-line detection analyzer 113, a turbidity on-line detection analyzer 114, and a water-oil on-line detection analyzer 115. The TOC on-line detection analyzer 111, the COD on-line detection analyzer 112, the pH value on-line detection analyzer 113, the turbidity on-line detection analyzer 114, and the water-oil on-line detection analyzer 115 are respectively connected to the DCS control module 170, and all are off-the-shelf components. The specific principles and technical details are not elaborated herein. The TOC on-line detection analyzer 111 is used to detect the total amount of carbon and organic matter in the water body in the return water main pipe 40. The COD on-line detection analyzer 112 is used to detect the oxygen demand in the water body in the return water main pipe 40. The pH value on-line detection analyzer 113 is used to detect the real-time pH value of the water body in the return water main pipe 40. The turbidity on-line detection analyzer 114 is used to detect the transparency of the water body in the return water main pipe 40. The water-oil on-line detection analyzer 115 is used to detect whether there is an oil-based medium leakage in the water in the return water main pipe 40. The above-mentioned several analyzers transmit the detection data to the DCS control module 170 at all times. When the detection data is abnormal, it means that the heat exchanger 20 has leaked.

[0035] The leak point location integrated detection module 110 includes a TOC on-line detection analyzer 111, a COD on-line detection analyzer 112, a pH value on-line detection analyzer 113, a turbidity on-line detection analyzer 114, a water-oil on-line detection analyzer 115, a sample collection pipe 116, a sewage collection pipe 117, a high-pressure nitrogen gas pipe 118 provided with a solenoid valve two 118a, and several sampling pipelines 119. The number of the sampling pipelines 119 is the same as the number of the heat exchangers 20.

[0036] The TOC on-line detection analyzer 111 is communicated with the sample collection pipe 116 through a TOC detection branch 111a and is communicated with the sewage collection pipe 117 through a TOC drainage branch 111b. The inlet end of the TOC detection branch 111a is communicated with the sample collection pipe 116, and the outlet end is communicated with the inlet end of the TOC on-line detection analyzer 111. A solenoid valve three 111c is arranged near the inlet end of the TOC detection branch 111a. The inlet end of the TOC drainage branch 111b is communicated with the outlet end of the TOC on-line detection analyzer 111, and the outlet end is communicated with the sewage collection pipe 117. A check valve 111d is arranged on the TOC drainage branch 111b to prevent the sewage from flowing back and polluting the TOC on-line detection analyzer 111.

[0037] The on-line COD analyzer 112 is connected to the sample collecting pipe 116 through the COD detection branch 112a and to the sewage collecting pipe 117 through the COD drainage branch 112b; the inlet end of the COD detection branch 112a is connected to the sample collecting pipe 116, and the outlet end is connected to the inlet end of the on-line COD analyzer 112. A solenoid valve four 112c is arranged near the inlet end of the COD detection branch 112a; the inlet end of the COD drainage branch 112b is connected to the outlet end of the on-line COD analyzer 112, and the outlet end is connected to the sewage collecting pipe 117. A check valve 111d is arranged on the COD drainage branch 112b to prevent sewage from flowing back and polluting the on-line COD analyzer 112.

[0038] The on-line pH analyzer 113 is connected to the sample collecting pipe 116 through the pH detection branch 113a and to the sewage collecting pipe 117 through the pH drainage branch 113b; the inlet end of the pH detection branch 113a is connected to the sample collecting pipe 116, and the outlet end is connected to the inlet end of the on-line pH analyzer 113. A solenoid valve five 113c is arranged near the inlet end of the pH detection branch 113a; the inlet end of the pH drainage branch 113b is connected to the outlet end of the on-line pH analyzer 113, and the outlet end is connected to the sewage collecting pipe 117. A check valve 111d is arranged on the pH drainage branch 113b to prevent sewage from flowing back and polluting the on-line pH analyzer 113.

[0039] The on-line turbidity analyzer 114 is connected to the sample collecting pipe 116 through the turbidity detection branch 114a and to the sewage collecting pipe 117 through the turbidity drainage branch 114b; the inlet end of the turbidity detection branch 114a is connected to the sample collecting pipe 116, and the outlet end is connected to the inlet end of the on-line turbidity analyzer 114. A solenoid valve six 114c is arranged near the inlet end of the turbidity detection branch 114a; the inlet end of the turbidity drainage branch 114b is connected to the outlet end of the on-line turbidity analyzer 114, and the outlet end is connected to the sewage collecting pipe 117. A check valve 111d is arranged on the turbidity drainage branch 114b to prevent sewage from flowing back and polluting the on-line turbidity analyzer 114.

[0040] The online water-oil detector 115 is connected to the sample collecting pipe 116 through a water-oil detection branch 115a and to the sewage collecting pipe 117 through a water-oil drainage branch 115b. The inlet end of the water-oil detection branch 115a is connected to the sample collecting pipe 116, and the outlet end is connected to the inlet end of the online water-oil detector 115. A solenoid valve VII 115c is arranged near the inlet end of the water-oil detection branch 115a. The inlet end of the water-oil drainage branch 115b is connected to the outlet end of the online water-oil detector 115, and the outlet end is connected to the sewage collecting pipe 117. A check valve 111d is arranged on the water-oil drainage branch 115b to prevent the sewage from flowing back and polluting the online water-oil detector 115.

[0041] The sampling pipelines 119 correspond to the heat exchangers 20 one by one. One end of the sampling pipeline 119 is connected to the outlet end of the heat exchanger 20, and the other end is connected to the sample collecting pipe 116. A sampling solenoid valve 119a is arranged on the sampling pipeline 119. The sampling pipeline 119 is connected to one end of a quick return circuit 119b upstream of the sampling solenoid valve 119a, and the other end of the quick return circuit 119b is connected to the sewage collecting pipe 117. A rotameter 119c is arranged on the quick return circuit 119b.

[0042] Temperature and pressure detection modules 130 are respectively arranged on the feed water main pipe 30 and the return water main pipe 40. The temperature and pressure detection module 130 includes a temperature detection unit and a pressure detection unit, which are respectively used for detecting temperature and pressure. The temperature and pressure detection module 130 is connected to the DCS control module 170 and transmits the monitoring data. The leakage detection system 10 constantly detects the water temperature and water pressure in the feed water main pipe 30 and the return water main pipe 40 through the temperature and pressure detection module 130 to give early warnings and prevent the heat exchanger 20 from being damaged due to changes in temperature or pressure. Among them, the temperature detection unit and the pressure detection unit adopt existing technologies, and the specific details are not described herein again.

[0043] The leakage detection system 10 further includes a plurality of combustible and toxic gas analyzers 140, which are connected to the DCS control module 170. A plurality of the combustible and toxic gas analyzers 140 are respectively arranged at the air outlet of the fan of the cooling tower 50 and around the pool for detecting the leakage of combustible and toxic gases in the water body. Among them, the combustible and toxic gas analyzers 140 are off-the-shelf components, and their principles are not described herein again.

[0044] The described leak detection system 10 further includes a raw water make-up pipeline 150 and a raw water make-up valve 151 provided on the raw water make-up pipeline 150. The raw water make-up valve 151 is a solenoid valve and is connected to the DCS control module 170. One end of the raw water make-up pipeline 150 is connected to a raw water source, and the other end is communicated with the water supply main pipe 30. The connection point is arranged between the water supply main valve 310 and the water supply pump 320. The raw water make-up pipeline 150 is used to supplement raw water after the heat exchanger 20 leaks.

[0045] The described leak detection system 10 further includes a sewage tank pipeline 160. One end of the sewage tank pipeline 160 is connected to the return water main pipe 40, and the other end is connected to a sewage tank. The connection point is near the inlet of the return water main valve 410. A sewage treatment main valve 161 is arranged near the end of the sewage tank pipeline 160 close to the return water main pipe 40. The sewage tank pipeline 160 is used to drain the contaminated water into the sewage tank.

[0046] The DCS control module 170 is the control core of the present utility model and is responsible for executing the monitoring and control tasks of the industrial process. The DCS control module 170 is respectively connected to the above-mentioned detectors, temperature and pressure detection module 130, each solenoid valve and water pump, etc. The DCS control module 170 includes a host with a CPU, a display screen and a keyboard. The DCS control module 170 adopts the existing technology. Those skilled in the art can realize its functions according to the description in this article without creative labor, so the principles and technical details are not described in detail here.

[0047] When the analysis data detected by the leak real-time detection module 120 shows abnormal changes, an alarm prompt appears on the DCS control module 170 screen, indicating that the heat exchanger 20 may leak. When it is detected that there may be a leakage risk, the DCS control module 170 can automatically open the raw water make-up valve 151 and close the water supply main valve 310; close the return water main valve 410 and open the return water to sewage treatment main valve 161. Let the circulating water contaminated by the medium be transported to the sewage treatment plant to avoid other hazards such as the formation of dirt and blockage of the heat exchange tubes due to the long-term circulation of the contaminated water in the system.

[0048] Meanwhile, start the leak point location integrated detection module 110 to accurately detect which heat exchanger 20 is leaking; specifically, connect the return water of each heat exchanger 20 to the sample collecting pipe 116 of the leak point location integrated detection module 110 through the sampling pipeline 119 in sequence. The solenoid valves three 111c, solenoid valves four 112c, solenoid valves five 113c, solenoid valves six 114c, and solenoid valves seven 115c from the sample collecting pipe 116 to each analyzer are in the normally open state. When there is no alarm for the water quality of the return water main pipe 40, the return water of each heat exchanger 20 to the leak point location integrated detection module 110 passes through the fast loop 119b and is discharged to the sewage collection pipeline and then to the sewage tank to keep the sample fresh. When an alarm occurs in the water quality detection of the return water main pipe 40, the DCS control module 170 sequentially opens the sampling solenoid valves 119a of each sampling pipeline 119 to analyze whether each heat exchanger 20 is leaking one by one; if the first path is detected to be normal, close the sampling solenoid valve 119a of the first path sampling pipeline 119; then the DCS control module 170 activates the purging function, opens the solenoid valve two 118a on the high-pressure nitrogen pipe 118 and the solenoid valve one 116a between the sample collecting pipe 116 and the sewage collecting pipe 117, purges the sample in the sample collecting pipe 116, and then closes the solenoid valve one 116a and the solenoid valve two 118a, and then sequentially cycle for sample two and sample three analysis until the leaking heat exchanger 20 is found.

[0049] In order to be able to monitor the water quality of water bodies in real time and promptly reflect the operation status of the device. A filtered raw water make-up pipeline 150 is installed on the pump inlet side of the circulating water supply pipeline. When leakage is detected, the raw water make-up valve 151 is opened. A pipeline 160 leading to the sewage tank is installed on the main return pipe 40 of the circulating water. When leakage is detected, the returned water of the device is sent to the sewage tank for treatment. An on-line water-oil detection analyzer 115 is installed on the main feed pipe 30 and the main return pipe of the cooling water to detect that the oil content in the water is not more than 10 mg / L. If the monitored value is greater than 20 mg / L, the DCS control module 170 will give an alarm to remind relevant personnel to handle it; an on-line TOC detection analyzer 111 is installed to detect the total amount of carbon and organic matter in the water body, and the TOC content in the water is detected to be not more than 30 mg / L. If this value is exceeded, the DCS control module 170 will give an alarm to remind relevant personnel to handle it; an on-line COD detection analyzer 112 is installed to detect the oxygen demand in the water body, and the on-line COD value is not more than 5 mg / L. If this value is exceeded, the DCS control module 170 will give an alarm to remind relevant personnel to handle it; an on-line PH value detection analyzer 113 is installed to detect the real-time PH value of the water body, and the PH value is controlled between 7 and 9. If this range is exceeded, the DCS control module 170 will give an alarm to remind relevant personnel to handle it; an on-line turbidity detection analyzer 114 is installed to detect the transparency of the water body, and the transparency is less than or equal to 30. If this range is exceeded, the DCS control module 170 will give an alarm to remind relevant personnel to handle it. A combustible and toxic gas analyzer 140 is installed at the air outlet of the fan of the cooling tower 50 and around the water tank to detect the leakage of combustible and toxic gases in the water body.

[0050] The above are only optional embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. All equivalent structural transformations made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A leakage detection system (10) for heat exchange equipment for chemical industry, characterized in that: It comprises a real-time leakage detection module (120), a leakage point location integrated detection module (110) and a DCS control module (170); The real-time leakage detection module (120) is arranged on the return water main pipe (40); The leak point location integrated detection module (110) comprises a TOC online detection analyzer (111), a COD online detection analyzer (112), a pH value online detection analyzer (113), a turbidity online detection analyzer (114), a water and oil online detection analyzer (115), a sample collection pipe (116), a sewage collection pipe (117), a high-pressure nitrogen pipe (118) provided with a second electromagnetic valve (118a), and a plurality of sampling pipelines (119); the sample collection pipe (116) is respectively connected to the inlet end of the TOC online detection analyzer (111), the inlet end of the COD online detection analyzer (112), the inlet end of the pH value online detection analyzer (113), the inlet end of the turbidity online detection analyzer (114), and the inlet end of the water and oil online detection analyzer (115); the TOC online detection analyzer (111) The outlet end of the sample collection pipe (116) is connected to the high-pressure nitrogen pipe (118), and the other end is connected to the sewage collection pipe (117) through an electromagnetic valve (116a); the end of the sewage collection pipe (117) is connected to a sewage pool; the sampling pipeline (119) corresponds to the heat exchanger (20) in a one-to-one manner, one end of the sampling pipeline (119) is connected to the outlet end of the heat exchanger (20), and the other end is connected to the sample collection pipe (116); a sampling electromagnetic valve (119a) is provided on the sampling pipeline (119); The DCS control module (170) is connected to the real-time leakage detection module (120) and the leakage point positioning integrated detection module (110) respectively.

2. A leakage detection system (10) for heat exchange equipment for chemical industry according to claim 1, characterized in that: The real-time leakage detection module (120) also includes a TOC online detection analyzer (111), a COD online detection analyzer (112), a pH value online detection analyzer (113), a turbidity online detection analyzer (114) and a water and oil online detection analyzer (115).

3. The leakage detection system (10) for heat exchange equipment for chemical industry according to claim 1, characterized in that: The leak point location integrated detection module (110) further comprises a TOC detection branch (111a), a TOC drainage branch (111b), a COD detection branch (112a), a COD drainage branch (112b), a pH value detection branch (113a), a pH value drainage branch (113b), a turbidity detection branch (114a), a turbidity drainage branch (114b), a water-oil detection branch (115a), and a water-oil drainage branch (115b).

4. A leakage detection system (10) for heat exchange equipment for chemical industry according to claim 3, characterized in that: Solenoid valves are provided on the TOC detection branch (111a), the COD detection branch (112a), the pH value detection branch (113a), the turbidity detection branch (114a) and the water-oil detection branch (115a).

5. The leakage detection system (10) for heat exchange equipment for chemical industry according to claim 3, characterized in that: The TOC drainage branch (111b), the COD drainage branch (112b), the pH value drainage branch (113b), the turbidity drainage branch (114b) and the water-oil drainage branch (115b) are all provided with a check valve (111d).

6. The leakage detection system (10) for heat exchange equipment for chemical industry according to claim 1, characterized in that: The sampling pipeline (119) is connected to one end of a fast loop (119b) upstream of the sampling solenoid valve (119a), and the other end of the fast loop (119b) is connected to the sewage collection pipe (117). A rotor flowmeter (119c) is provided on the fast loop (119b).

7. A leakage detection system (10) for heat exchange equipment for chemical industry according to any one of claims 1 to 6, characterized in that: The leakage detection system (10) further comprises a temperature and pressure detection module (130).

8. A leakage detection system (10) for heat exchange equipment for chemical industry according to any one of claims 1 to 6, characterized in that: The leakage detection system (10) further comprises a plurality of flammable and toxic gas analyzers (140).

9. A leakage detection system (10) for heat exchange equipment for chemical industry according to any one of claims 1 to 6, characterized in that: The leakage detection system (10) further comprises a raw water replenishment pipeline (150) and a raw water replenishment valve (151) arranged on the raw water replenishment pipeline (150).

10. A leakage detection system (10) for heat exchange equipment for chemical industry according to any one of claims 1 to 6, characterized in that: The leakage detection system (10) further comprises a sewage treatment tank pipeline (160), wherein the sewage treatment tank pipeline (160) is provided with a sewage treatment main valve (161).

Images