Online analysis system for detecting gas leakage of heat exchange device

Abstract

The utility model discloses an on-line analysis system for detecting gas leakage of a heat exchange device, which comprises a gas stripper, a combustible gas detector is arranged on one side of the gas stripper, the bottom end of the gas stripper is fixedly communicated with a mixture pipeline, and one end of the mixture pipeline far away from the gas stripper is fixedly communicated with a nitrogen input pipeline and a condensate water pipeline. One side of the top end of the gas stripper is fixedly provided with a liquid level switch, and the other side of the top end of the gas stripper is fixedly communicated with a dewaterer removal pipeline. The online analysis system for detecting the gas leakage of the heat exchange device can simply and efficiently extract trace toxic and harmful gas in circulating water for analysis; the online gas stripping device adopts the design of a communicating vessel principle structure, so that the liquid level of a water seal section is ensured to be constant, the pressure of sample gas at the outlet of the online gas stripping tank is ensured to be constant, and enough sample pressure and flow are provided for an analysis instrument; and the filler is arranged in the online gas stripper, so that nitrogen and trace toxic gas can be fully fused and extracted.

Description

Technical Field

[0001] The utility model relates to the technical field of petrochemical industry, in particular to an online analysis system for detecting gas leakage of a heat exchange device. Background Art

[0002] Cooling tower, as a large-scale heat exchange equipment, is widely used in various fields of national production, among which the typical industries are petroleum and chemical industry. It is an indispensable and important link in the production process. Therefore, its safety performance is crucial to the entire device. Among its safety performance, leakage is one of the important indicators. At present, the online detection method for leakage of the main sample medium pipeline in the cooling tower is mainly to measure the pH value and total organic content of the circulating water by PH, COD, TOC, etc. to determine whether there is leakage, or to directly detect whether there is leakage of the sample medium through a combustible gas detector or a toxic gas detector.

[0003] However, the traditional analysis system has the following disadvantages

[0004] (1) When the traditional analytical system is measuring, the prerequisite is that the device has a large amount of or long-term leakage, which is extremely dangerous to the entire device and will also cause great pollution to the environment, posing a major hidden danger to the safety of life and property in the surrounding area;

[0005] (2) Traditional analysis systems are mainly used to measure organic matter leakage. If the main sample medium pipeline transports inorganic gas, such as CO, and the leakage is very weak at the ppm level, it cannot be effectively measured by traditional analysis systems. Utility Model Content

[0006] The purpose of the utility model is to provide an online analysis system for detecting gas leakage in a heat exchange device, so as to solve the problem that when the traditional analysis system is measured in the above-mentioned background technology, its prerequisite is that the device has a large amount of or long-term leakage in order to effectively measure, which is extremely dangerous to the entire device and will also cause great pollution to the environment, posing a major hidden danger to the safety of life and property in the surrounding area; the traditional analysis system measurement is mainly aimed at the measurement of organic leakage. If the main sample medium pipeline transports inorganic gas, such as CO, and the leakage is very weak at the ppm level, it is impossible to effectively measure it through the traditional analysis system.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an online analysis system for detecting gas leakage of a heat exchange device, comprising a gas stripper, a combustible gas detector is provided on one side of the gas stripper, the bottom end of the gas stripper is fixedly connected to a mixture pipeline, the end of the mixture pipeline away from the gas stripper is fixedly connected to a nitrogen input pipeline and a condensed water pipeline, a liquid level switch is fixedly installed on one side of the top of the gas stripper, the other side of the top of the gas stripper is fixedly connected to a dehydrator pipeline, a dehydrator is fixedly installed in the middle of the dehydrator pipeline, a flame arrester is connected to one side of the combustible gas detector, and a solenoid valve is fixedly installed in the middle of the mixture pipeline.

[0008] Preferably, a first flow meter is fixedly installed in the middle of the nitrogen input pipeline, and a first cut-off valve located on one side of the first flow meter is fixedly installed on the nitrogen input pipeline. The first flow meter detects the flow rate of nitrogen transported in the nitrogen input pipeline, and the first cut-off valve cuts off the nitrogen input into the nitrogen input pipeline in real time.

[0009] Preferably, a second flow meter is fixedly installed in the middle of the condensate water pipe, and a second cut-off valve located on one side of the second flow meter is fixedly installed on the condensate water pipe. The second flow meter detects the flow rate of condensate water input into the condensate water pipe, and the second cut-off valve cuts off the condensate transported in the condensate water pipe in real time.

[0010] Preferably, one end of the gas stripper is fixedly connected to a first exhaust pipe, the other end of the gas stripper is fixedly connected to a drainage pipe, and the surface of the flame arrester is fixedly connected to a second exhaust pipe, the first exhaust pipe discharges excess gas in the gas stripper, the second exhaust pipe discharges excess gas in the flame arrester, and the drainage pipe discharges excess liquid in the gas stripper.

[0011] Preferably, a third flow meter located on one side of the dehydrator is installed on the dehydrator pipeline, and the third flow meter detects the flow of the dehydrated gas. The dehydrator dehydrates the mixture transported from the gas stripper to the dehydrator pipeline.

[0012] Preferably, one end of the dehydrator pipeline away from the gas stripper is fixedly connected to the side directly opposite the combustible gas detector, and a dehydrator pipeline is installed between the gas stripper and the combustible gas detector. After dehydration treatment through the dehydrator pipeline, the combustible gas detector detects the combustible gas content.

[0013] Preferably, a power inlet is provided on the surface of the liquid level switch, and the liquid level switch is connected to a 24V power supply through the power inlet.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The system can simply and efficiently extract trace amounts of toxic and harmful gases in circulating water for analysis;

[0016] 2. The online gas stripper adopts the design of the connecting vessel principle structure, which ensures the constant liquid level of the water seal section, thus ensuring the constant pressure of the sample gas at the outlet of the online gas stripping tank, providing sufficient sample pressure and flow for the analytical instrument;

[0017] 3. The internal filling of the online gas stripper ensures that nitrogen and trace toxic gases can be fully integrated and extracted;

[0018] 4. A liquid level switch is built into the top of the gas stripper, which is linked to the front-stage solenoid valve. If the back-stage drainage is blocked, the liquid level switch can cut off the solenoid valve in time to ensure that the water sample will not enter the back-stage instrument and damage it.

[0019] 5. Due to the special water seal structure design of the online gas stripper, the sample gas pressure after extraction is not affected by the circulating water inlet pressure and flow fluctuations;

[0020] 6. The system has a simple structure and can operate stably and reliably for a long time; the system requires minimal maintenance and can save resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a flow chart of the system of the utility model;

[0022] Figure 2 It is a schematic diagram of the structure of the gas stripper of the utility model.

[0023] In the figure: 1. gas stripper; 2. liquid level switch; 3. mixture pipeline; 4. solenoid valve; 5. nitrogen input pipeline; 6. first flow meter; 7. first shut-off valve; 8. condensate pipeline; 9. second flow meter; 10. second shut-off valve; 11. dehydrator pipeline; 12. dehydrator; 13. third flow meter; 14. combustible gas detector; 15. flame arrester; 16. drain pipeline; 17. first exhaust pipeline; 18. second exhaust pipeline; 19. power inlet. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0025] See also Figure 1-2The utility model provides an online analysis system for detecting gas leakage in a heat exchange device, comprising a gas stripper 1, a combustible gas detector 14 is provided on one side of the gas stripper 1, a mixture pipeline 3 is fixedly connected to the bottom end of the gas stripper 1, a nitrogen input pipeline 5 and a condensed water pipeline 8 are fixedly connected to the end of the mixture pipeline 3 away from the gas stripper 1, a liquid level switch 2 is fixedly installed on one side of the top of the gas stripper 1, a dehydrator pipeline 11 is fixedly connected to the other side of the top of the gas stripper 1, a dehydrator 12 is fixedly installed in the middle of the dehydrator pipeline 11, a flame arrester 15 is connected to one side of the combustible gas detector 14, and a solenoid valve 4 is fixedly installed in the middle of the mixture pipeline 3.

[0026] A first flow meter 6 is fixedly installed in the middle of the nitrogen input pipeline 5, and a first cut-off valve 7 located on one side of the first flow meter 6 is fixedly installed on the nitrogen input pipeline 5. The first flow meter 6 detects the flow rate of nitrogen transported in the nitrogen input pipeline 5, and the first cut-off valve 7 cuts off the nitrogen input into the nitrogen input pipeline 5 in real time.

[0027] A second flow meter 9 is fixedly installed in the middle of the condensate water pipe 8, and a second cut-off valve 10 is fixedly installed on the condensate water pipe 8 and located on one side of the second flow meter 9. The second flow meter 9 detects the flow rate of condensate water input into the condensate water pipe 8, and the second cut-off valve 10 cuts off the condensate water transported in the condensate water pipe 8 in real time.

[0028] One end of the gas stripper 1 is fixedly connected to a first exhaust pipe 17, the other end of the gas stripper 1 is fixedly connected to a liquid discharge pipe 16, and the surface of the flame arrester 15 is fixedly connected to a second exhaust pipe 18. The first exhaust pipe 17 discharges excess gas in the gas stripper 1, the second exhaust pipe 18 discharges excess gas in the flame arrester 15, and the liquid discharge pipe 16 discharges excess liquid in the gas stripper 1.

[0029] A third flow meter 13 located on one side of the dehydrator 12 is installed on the dehydrator pipeline 11, and the third flow meter 13 detects the flow of the dehydrated gas. The dehydrator 12 dehydrates the mixture transported from the gas stripper 1 to the dehydrator pipeline 11.

[0030] The end of the dehydrator pipe 11 away from the gas stripper 1 is fixedly connected to the side directly opposite the combustible gas detector 14. The dehydrator pipe 11 is installed between the gas stripper 1 and the combustible gas detector 14. After the dehydrator pipe 11 is dehydrated, the combustible gas detector 14 detects the combustible gas content.

[0031] A power inlet 19 is provided on the surface of the liquid level switch 2 , and the liquid level switch 2 is connected to a 24V power supply via the power inlet 19 .

[0032] When the embodiment of the present application is in use: nitrogen is transported to the mixture pipeline 3 through the nitrogen input pipeline 5, and condensed water is transported to the mixture pipeline 3 through the condensed water pipeline 8, and then enters the stripper 1. When passing through the filler in the stripper 1, the nitrogen and the trace toxic or flammable gas in the condensed water are fully merged and reach the upper part of the stripper 1. The liquid is discharged through the drainage pipeline 16, and the mixture is discharged from the dehydrator pipeline 11 at the top, enters the dehydrator 12, and then enters the analyzer for measurement and analysis. A liquid level switch 2 is also arranged on the top of the stripper 1. The liquid level switch 2 is linked to the front-stage solenoid valve. When the drainage port of the stripper 1 is blocked, the liquid level rises. After sensing, the liquid level switch 2 transmits the signal to the solenoid valve 4 in time to cut off the mixed water sample in the mixture pipeline 3, thereby protecting the subsequent analyzer from being eroded by the water sample. The stripper 1 adopts the principle of the communicating vessel structure, which ensures the timely overflow of the water sample while stabilizing the pressure of the mixed gas.

[0033] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. An online analysis system for detecting gas leakage in a heat exchange device, comprising a gas stripper (1), characterized in that: A combustible gas detector (14) is provided on one side of the gas stripper (1); a mixture pipeline (3) is fixedly connected to the bottom end of the gas stripper (1); a nitrogen input pipeline (5) and a condensed water pipeline (8) are fixedly connected to one end of the mixture pipeline (3) away from the gas stripper (1); a liquid level switch (2) is fixedly installed on one side of the top of the gas stripper (1); a dehydrator pipeline (11) is fixedly connected to the other side of the top of the gas stripper (1); a dehydrator (12) is fixedly installed in the middle of the dehydrator pipeline (11); a flame arrester (15) is connected to one side of the combustible gas detector (14); and a solenoid valve (4) is fixedly installed in the middle of the mixture pipeline (3).

2. The online analysis system for detecting gas leakage in a heat exchange device according to claim 1, characterized in that: A first flow meter (6) is fixedly installed in the middle of the nitrogen input pipeline (5), and a first cut-off valve (7) located on one side of the first flow meter (6) is fixedly installed on the nitrogen input pipeline (5).

3. The online analysis system for detecting gas leakage in a heat exchange device according to claim 1, characterized in that: A second flow meter (9) is fixedly installed in the middle of the condensate water pipeline (8), and a second shut-off valve (10) located on one side of the second flow meter (9) is fixedly installed on the condensate water pipeline (8).

4. The online analysis system for detecting gas leakage in a heat exchange device according to claim 1, characterized in that: One end of the stripper (1) is fixedly connected to a first exhaust pipe (17), the other end of the stripper (1) is fixedly connected to a liquid discharge pipe (16), and the surface of the flame arrester (15) is fixedly connected to a second exhaust pipe (18).

5. The online analysis system for detecting gas leakage in a heat exchange device according to claim 1, characterized in that: The dehydrator pipeline (11) is provided with a third flow meter (13) located on one side of the dehydrator (12).

6. The online analysis system for detecting gas leakage in a heat exchange device according to claim 1, characterized in that: One end of the dehydrator pipeline (11) away from the gas stripper (1) is fixedly connected to a side directly facing the combustible gas detector (14).

7. The online analysis system for detecting gas leakage in a heat exchange device according to claim 1, characterized in that: A power inlet (19) is provided on the surface of the liquid level switch (2).

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