Movable type negative pressure working condition heater drainage on-line leak detection device

Abstract

The utility model discloses a movable type negative pressure working condition heater drainage on-line leak detection device which comprises a movable vehicle body, a plurality of sampling pumps, a first measuring pipeline and a second measuring pipeline. The sampling pump is fixedly arranged on the mobile vehicle body; the inlet end of the sampling pump is communicated with the drain side of the heater through a sampling pipe; the water inlet end of the first measuring pipeline is communicated with the outlet end of the sampling pump, and an ion exchanger and a conductivity meter are sequentially arranged on the first measuring pipeline; the second measuring pipeline and the first measuring pipeline are arranged in parallel, the water inlet end of the second measuring pipeline is communicated with the outlet end of the sampling pump, and control valves are arranged on the first measuring pipeline and the second measuring pipeline. According to the utility model, drainage sample water of a single heater under different workshops and negative pressure working conditions passes through the sampling pump with reasonable suction lift, the sample water is cooled by the cooler and then respectively flows to the blowdown ion exchanger and the conductivity meter connected in series for manual sampling, so that online real-time monitoring of the conductivity is realized.

Description

Technical Field

[0001] This utility model relates to the field of power generation technology, and in particular to a mobile negative pressure heater condensate online leak detection device. Background Technology

[0002] Heat network heaters are a crucial component of thermal power generation units, serving as key equipment for ensuring public welfare and fulfilling the social responsibility of power generation enterprises. The safe operation of heat network heaters directly impacts the safety of the generating unit. In recent years, with the increasing emphasis on energy conservation and efficiency, more thermal turbines have been put into operation, leading to a gradual increase in the number of heaters and a growing safety hazard posed by heater leaks. If a heater leak occurs and is not detected and addressed promptly, a large amount of circulating water from the heat network will enter the thermal system, causing steam and water quality deterioration. This will result in corrosion and scaling of the boiler, superheater, turbine, and pipelines within the thermal system, seriously endangering equipment safety.

[0003] Existing online monitoring systems for heating network condensate drains cannot distinguish between individual heaters, and even if a leak is detected, timely and effective isolation measures cannot be taken. The heater condensate drain side is under negative pressure, making manual sampling of individual heater condensate impossible. Furthermore, heating network heaters and turbine heaters are located in different workshops, making real-time online monitoring difficult. Utility Model Content

[0004] To address the aforementioned issues, this invention provides a mobile online leak detection device for heater condensate under negative pressure conditions, thereby solving the problem of detecting and monitoring the quality of heater condensate under different workshops and negative pressure conditions.

[0005] This utility model is implemented as follows:

[0006] A mobile online leak detection device for a negative pressure heater condensate includes a mobile vehicle body, several sampling pumps, a first measuring pipeline, and a second measuring pipeline. The sampling pumps are fixedly mounted on the mobile vehicle body, and their inlet ends are connected to the condensate side of the heater via sampling pipes. The inlet end of the first measuring pipeline is connected to the outlet end of the sampling pumps, and an ion exchanger and a conductivity meter are sequentially installed on the first measuring pipeline. The second measuring pipeline is connected in parallel with the first measuring pipeline, and its inlet end is connected to the outlet end of the sampling pumps. Both the first and second measuring pipelines are equipped with control valves.

[0007] Furthermore, there are at least two sampling pumps, and the inlet of each sampling pump is connected to the condensate side of each heater through a corresponding sampling pipe.

[0008] Furthermore, the sampling tube is equipped with a first valve and a cooler, with the first valve located near the condensate side of the heater.

[0009] Furthermore, the sample water inlet of the cooler is connected to the outlet of the first valve, the sample water outlet of the cooler is connected to the inlet of the sampling pump, the cooling water inlet of the cooler is connected to a cooling water inlet pipe, and the cooling water outlet of the cooler is connected to a cooling water return pipe.

[0010] Furthermore, a second valve is installed on the cooling water inlet pipe, and a third valve is installed on the cooling water return pipe.

[0011] Furthermore, the inlet end of the first measuring pipeline is connected to the outlet end of each sampling pump through several first connecting pipelines. The number of first connecting pipelines is equal to the number of sampling pumps, and each first connecting pipeline is equipped with a fourth valve.

[0012] Furthermore, a fifth valve is provided on the first measuring pipeline, and the fifth valve is located near the water inlet end of the first measuring pipeline.

[0013] Furthermore, a flow meter is also installed on the first measuring pipeline, located between the fifth valve and the ion exchanger.

[0014] Furthermore, the mobile vehicle body includes a supporting chassis, with a handrail erected at one end of the supporting chassis.

[0015] Furthermore, omnidirectional wheels are provided at the four corners of the bottom of the supporting chassis, and braking devices are provided on the omnidirectional wheels.

[0016] The beneficial effects of this utility model are:

[0017] This utility model discloses a mobile online leak detection device for heater condensate under negative pressure conditions. It takes condensate samples from individual heaters operating in different workshops and under negative pressure conditions, and uses a sampling pump with a suitable suction lift to cool the samples in a cooler before directing them to the drain for manual sampling. The device also includes an ion exchanger and a conductivity meter connected in series, enabling real-time online monitoring of conductivity. By switching the sampling gates, comparative monitoring of the condensate quality from different heaters can be achieved. This method overcomes the difficulties of separately monitoring heaters in different workshops online and the inability to manually sample and monitor under negative pressure conditions.

[0018] This utility model discloses a mobile online leak detection device for heater condensate under negative pressure conditions. It includes a portable vehicle that can be quickly moved to the location of heaters in different workshops to sample and measure the condensate from the heaters under negative pressure conditions. Each sampling pump is fixed to a supporting chassis of the mobile vehicle. A cooler is installed on the sampling pipe, with cooling water connected to the inlet and outlet pipes. The sample water inlet of the cooler is connected to the heater condensate side, and the sample water outlet is connected to the sampling pump. The outlet of the sampling pump is connected to a first measuring pipeline and a second measuring pipeline. After the sample water is extracted by the sampling pump, it can be manually sampled and analyzed through the second measuring pipeline. Another path flows through the first measuring pipeline, through an ion exchanger, and into a conductivity meter, enabling automatic real-time monitoring of the sample water. Parallel installation of the sampling pump, flow meter, ion exchanger, and conductivity meter improves leak detection efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Mobile vehicle body; 101. Support chassis; 102. Handrail; 103. Universal wheels; 2. Sampling pump; 3. First measuring pipeline; 4. Second measuring pipeline; 5. Sampling tube; 6. Heater; 7. Ion exchanger; 8. Conductivity meter; 9. First valve; 10. Cooler; 11. Cooling water inlet pipe; 12. Cooling water return pipe; 13. Second valve; 14. Third valve; 15. First connecting pipeline; 16. Fourth valve; 17. Fifth valve; 18. Flow meter; 19. Second connecting pipeline; 20. Sixth valve. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Many specific details are set forth in the following description to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0023] like Figure 1The diagram shows a mobile negative pressure heater condensate online leak detection device of this utility model, comprising a mobile vehicle body 1, several sampling pumps 2, a first measuring pipeline 3, and a second measuring pipeline 4. The sampling pumps 2 are fixedly mounted on the mobile vehicle body 1, and their inlet ends are connected to the condensate side of the heater 6 via sampling pipes 5. The inlet end of the first measuring pipeline 3 is connected to the outlet end of the sampling pumps 2, and an ion exchanger 7 and a conductivity meter 8 are sequentially mounted on the first measuring pipeline 3. The second measuring pipeline 4 is connected in parallel with the first measuring pipeline 3, and its inlet end is connected to the outlet end of the sampling pumps 2. Control valves are mounted on both the first measuring pipeline 3 and the second measuring pipeline 4.

[0024] like Figure 1 As shown, sampling pump 2 is fixedly mounted on the mobile vehicle body 1. The inlet end of sampling pump 2 is connected to the condensate side of heater 6 through sampling pipe 5. The number of sampling pumps 2 is at least two; in this embodiment, there are two, but this is not a limitation. The number of sampling pumps 2 can also be three, four, or more, depending on actual needs. The inlet end of each sampling pump 2 is connected to the condensate side of each heater 6 through a corresponding sampling pipe 5. The sampling pipe 5 is also equipped with a first valve 9 and a cooler 10, with the first valve 9 positioned close to the condensate side of heater 6. The number of sampling pipes 5 is the same as the number of sampling pumps 2, and multiple sampling pipes 5 are connected in parallel. By setting multiple sampling pumps 2 and coolers 10, sample water from different condensate sides of heater 6 is extracted, and sample water from the condensate sides of heater 6 in different locations in different workshops is cooled, enabling sampling and measurement of different condensate sides of heater 6.

[0025] The sample water inlet of cooler 10 is connected to the outlet of first valve 9, and the sample water outlet of cooler 10 is connected to the inlet of sampling pump 2. Cooling water inlet pipe 11 connects to the cooling water inlet of cooler 10, and cooling water outlet pipe 12 connects to the cooling water outlet of cooler 10. A second valve 13 is installed on cooling water inlet pipe 11, and a third valve 14 is installed on cooling water return pipe 12. Since the drain side of heater 6 is under negative pressure, sampling pump 2 with a reasonable suction lift is required to draw the sample water cooled by cooler 10, meeting the conditions for subsequent manual sampling analysis and automatic instrument detection.

[0026] The inlet of the first measuring pipeline 3 is connected to the outlet of the sampling pump 2. An ion exchanger 7 and a conductivity meter 8 are sequentially installed on the first measuring pipeline 3. The inlet of the first measuring pipeline 3 is connected to the outlet of each sampling pump 2 via several first connecting pipelines 15, the number of which is equal to the number of sampling pumps 2. Each first connecting pipeline 15 is equipped with a fourth valve 16 to control its on / off state and opening degree. By switching the fourth valves 16 on different first connecting pipelines 15, the conductivity values ​​of the sample water on the condensate side of different heaters 6 are compared, measured, and read. The outlet of each first connecting pipeline 15 is connected to the inlet of the first measuring pipeline 3, meaning that the sample water flows into the first measuring pipeline 3 after converging at the outlets of multiple first connecting pipelines 15. A fifth valve 17 is installed on the first measuring pipeline 3, located near the inlet of the first measuring pipeline 3. A flow meter 18 is also installed on the first measuring pipeline 3, located between the fifth valve 17 and the ion exchanger 7. The fifth valve 17 is used to regulate the flow rate on the first measuring pipeline 3 and displays the flow rate on the flow meter 18. The ion exchanger 7 contains regenerated cation exchange resin for removing cations from the sample water. A conductivity meter 8 is used to detect the conductivity of the sample water. After the sample water passes through the conductivity meter 8, it is discharged into the sewage system.

[0027] The second measuring pipeline 4 is connected in parallel with the first measuring pipeline 3. The inlet of the second measuring pipeline 4 is connected to the outlet of the sampling pump 2 through several second connecting pipelines 19. The number of second connecting pipelines 19 is equal to the number of first connecting pipelines 15. Each second connecting pipeline 19 is equipped with a sixth valve 20 to control the on / off state and opening degree of the pipeline. The outlet of each second connecting pipeline 19 is connected to the inlet of the second measuring pipeline 4, meaning that the sample water flows through the outlets of multiple second connecting pipelines 19 and converges before entering the second measuring pipeline 4. The second measuring pipeline 4 is used for manual sampling and analysis of the sample water. By manually sampling and analyzing the sample water for hardness, chloride ion content, etc., the hydrophobicity of the heater 6 can be quickly verified. The number of second connecting pipelines 19 is the same as the number of first connecting pipelines 15. Each second connecting pipeline 19 is equipped with a sixth valve 20 to control its on / off state and opening degree. By controlling the sixth valve 20 on each of the second connecting pipes 19 to manually sample the water and test other parameters, it is possible to identify and confirm the heater 6 that is leaking.

[0028] The mobile vehicle 1 includes a supporting chassis 101, with a handrail 102 erected at one end of the chassis 101. Universal wheels 103 are rotatably mounted at the four corners of the bottom of the chassis 101, and braking devices are installed on the universal wheels 103. When workers push the handrail 102, the mobile vehicle 1 moves within the workshop and between different workshops via the rotation of the universal wheels 103. It can quickly move to the location of the heater 6 in different workshops and use the sampling pump 2 to sample the condensate from the heater 6 under negative pressure conditions.

[0029] The mobile negative pressure heater condensate online leak detection device of this utility model has the following steps in use:

[0030] S1. Set up a sampling point on the hydrophobic side of heater 6 that needs to be tested, and install a sampling tube and sampling gate;

[0031] S2. Move the mobile vehicle 1 to the position of the heater 6 to be tested, connect the cooling water inlet of the cooler 10 to the cooling water inlet pipe 11, and connect the cooling water return of the cooler 10 to the cooling water return pipe 12. Open the second valve 13 and the third valve 14. Connect the sample water inlet of the cooler 10 and the sampling pipe 5 to the sampling pipe on the condensate side of the heater 6, open the first valve 9, and use the sampling pump 2 to draw the sample water from the condensate side of the heater 6 into the sampling pipe 5.

[0032] S3. When it is necessary to automatically monitor the sample water condition on the condensate side of heater 6 in real time, close the sixth valve 20 on each of the second connecting pipes 19, and open the fourth valve 16 on the corresponding first connecting pipe 15 and the fifth valve 17 on the first measuring pipe 3. The sample water on the condensate side of heater 6 enters the first measuring pipe 3 through the cooler 10, the sampling pump 2, and the first connecting pipe 15. After the sample water flows through the ion exchanger 7, it flows to the conductivity meter 8. After the conductivity meter 8 stabilizes, the value is read and compared with the normal value to determine the condensate quality of heater 6.

[0033] S4. When it is necessary to test other parameters of the sample water of heater 6, manual sampling can be performed. Open the sixth valve 20 of the second connecting pipe 19 connected to the heater. The sample water is cooled by the cooler 10 and drawn by the sampling pump 2 and flows into the second connecting pipe 19. The staff collects the sample water at the outlet of the second measuring pipe 4. Then, the hardness, chloride ion content and other parameters of the manually sampled water are tested, which can quickly verify the hydrophobic quality of heater 6.

[0034] While this utility model discloses preferred embodiments to achieve the above objectives, it is not intended to limit the structural features of this utility model. Anyone skilled in the art should know that any easily conceivable variations or modifications are possible under the technical spirit of this utility model and are covered by the patent claims of this utility model.

Claims

1. A mobile online leak detection device for the condensate drain of a heater operating under negative pressure, characterized in that, include: Mobile vehicle body (1); Several sampling pumps (2) are fixedly installed on the mobile vehicle body (1), and the inlet end of the sampling pump (2) is connected to the drain side of the heater (6) through the sampling pipe (5); The first measuring pipeline (3) has its inlet end connected to the outlet end of the sampling pump (2), and the first measuring pipeline (3) is provided with an ion exchanger (7) and a conductivity meter (8) in sequence. The second measuring pipeline (4) is connected in parallel with the first measuring pipeline (3). The inlet end of the second measuring pipeline (4) is connected to the outlet end of the sampling pump (2). Both the first measuring pipeline (3) and the second measuring pipeline (4) are equipped with control valves.

2. The mobile negative pressure heater condensate online leak detection device according to claim 1, characterized in that, The number of sampling pumps (2) is at least two, and the inlet end of each sampling pump (2) is connected to the condensate side of each heater (6) through a corresponding sampling pipe (5).

3. The mobile negative pressure heater condensate online leak detection device according to claim 2, characterized in that, The sampling tube (5) is provided with a first valve (9) and a cooler (10), and the first valve (9) is located near the hydrophobic side of the heater (6).

4. The mobile negative pressure heater condensate online leak detection device according to claim 3, characterized in that, The sample water inlet of the cooler (10) is connected to the outlet of the first valve (9), the sample water outlet of the cooler (10) is connected to the inlet of the sampling pump (2), the cooling water inlet of the cooler (10) is connected to a cooling water inlet pipe (11), and the cooling water outlet of the cooler (10) is connected to a cooling water return pipe (12).

5. The mobile negative pressure heater condensate online leak detection device according to claim 4, characterized in that, The cooling water inlet pipe (11) is equipped with a second valve (13), and the cooling water return pipe (12) is equipped with a third valve (14).

6. The mobile negative pressure heater condensate online leak detection device according to claim 1 or 2, characterized in that, The inlet end of the first measuring pipeline (3) is connected to the outlet end of each of the sampling pumps (2) through a number of first connecting pipelines (15). The number of the first connecting pipelines (15) is equal to the number of the sampling pumps (2). Each of the first connecting pipelines (15) is provided with a fourth valve (16).

7. The mobile negative pressure heater condensate online leak detection device according to claim 1, characterized in that, The first measuring pipeline (3) is provided with a fifth valve (17), which is located near the water inlet of the first measuring pipeline (3).

8. The mobile negative pressure heater condensate online leak detection device according to claim 7, characterized in that, The first measuring pipeline (3) is also equipped with a flow meter (18), which is located between the fifth valve (17) and the ion exchanger (7).

9. The mobile negative pressure heater condensate online leak detection device according to claim 1 or 2, characterized in that, The mobile vehicle body (1) includes a support chassis (101), and a handrail (102) is erected at one end of the support chassis (101).

10. The mobile negative pressure heater condensate online leak detection device according to claim 9, characterized in that, The bottom four corners of the support chassis (101) are provided with omnidirectional wheels (103), and the omnidirectional wheels (103) are provided with braking devices.

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