Water pipe leakage detection device for boiler smoke treatment

Abstract

The utility model relates to the technical field of boiler smoke dust treatment, in particular to a water pipe leakage detection device for boiler smoke dust treatment, which comprises a smoke dust channel conductive tube, a maintenance platform, a conductive detection rod and a conductive probe, the conductive detection rod is fixed on the inner wall of the smoke dust channel conductive tube through an insulating support frame, and the conductive probe is arranged on the conductive detection rod. A maintenance platform is arranged on the bottom wall of the front side of the conductive probe, and an anti-interference device is arranged between the maintenance platform and the conductive probe. The water pipe leakage detection device is reasonable and compact in structure and convenient to use, can efficiently and accurately detect water pipe leakage of the boiler smoke dust treatment system, reduces economic loss of the boiler smoke dust treatment system caused by water pipe leakage, and improves safe operation productivity of the boiler smoke dust treatment system.

Description

Technical Field

[0001] This utility model relates to the field of boiler flue gas treatment technology, and is a water pipe leakage detection device for boiler flue gas treatment. Background Technology

[0002] The flue gas emitted from thermal power plant boilers contains fly ash (PM), unburned carbon particles (PM), sulfur dioxide (SO2), and nitrogen oxides (NOx). x To meet environmental protection requirements and ensure the reusability of energy, thermal power plants use electrostatic precipitators to first remove dust from boiler flue gas, and then use desulfurization and denitrification devices to treat the flue gas for desulfurization and denitrification.

[0003] The flue gas temperature emitted from coal-fired boilers in thermal power plants ranges from approximately 180℃ to 410℃, exceeding the maximum operating temperature of electrostatic precipitators (ESPs). Therefore, heat exchangers are used to cool the boiler exhaust gas. These heat exchangers contain heat exchange tubes, and condensate circulating within them cools the flue gas. However, due to the narrowing of the flue gas inlet at the boiler exhaust duct leading to the heat exchanger inlet, the flue gas velocity increases, accelerating wear on the heat exchange tubes. After prolonged operation, leaks may occur in the heat exchange tubes, allowing water to flow into the flue gas, increasing the flue gas humidity and affecting the dust removal efficiency of the subsequent ESP process. Severe leaks in the heat exchange tubes can cause a short circuit within the ESP, halting flue gas dust removal. Troubleshooting such malfunctions requires significant time from staff to inspect and analyze the equipment throughout the production process, determine the cause of the malfunction, develop a repair plan, and resolve the production failure before the flue gas treatment system can be restarted.

[0004] In summary, investigating the causes of accidents in the flue gas treatment systems of coal-fired boilers in thermal power plants consumes a significant amount of time, reducing the efficiency of these systems and becoming a difficult technical problem for thermal power plant enterprises to solve. Utility Model Content

[0005] This invention provides a water pipe leakage detection device for boiler flue dust treatment, which overcomes the shortcomings of the prior art and can effectively solve the problem of low efficiency in investigating the cause of water pipe leakage accidents in existing boiler flue dust treatment systems.

[0006] The technical solution of this utility model is achieved through the following measures: a water pipe leakage detection device for boiler flue gas treatment, including a flue gas channel conductive pipe, a maintenance platform, a conductive detection rod and conductive probes. The flue gas channel conductive pipe is a horizontal pipe. The two ends of the conductive detection rod are horizontally fixed to the inner wall of the flue gas channel conductive pipe by an insulating support frame. Vertically downward conductive probes are arranged on the conductive detection rod at intervals on the left and right. A gap is left between the bottom of the conductive probe and the bottom wall of the flue gas channel conductive pipe. A maintenance platform is set on the bottom wall of the flue gas channel conductive pipe in front of the conductive probe. An anti-interference device is set on the bottom wall between the maintenance platform and the conductive probe.

[0007] The following are further optimizations and / or improvements to the above-mentioned utility model technical solution:

[0008] The aforementioned anti-interference device includes an insulating base plate and a barrier plate. An insulating base plate is laid on the bottom wall between the maintenance platform and the conductive probe, and a vertical barrier plate is installed between the insulating base plate and the maintenance platform.

[0009] The lengths of the aforementioned insulating base plate and barrier plate are both greater than the length of the conductive probe rod.

[0010] The aforementioned device also includes a controller, and the conductive detection rod and the conductive tube of the smoke and dust channel are electrically connected to the controller.

[0011] The second technical solution of this utility model is achieved through the following measures: a boiler flue gas treatment device, including a boiler, a waste heat exchanger, a dust collector, and a water pipe leakage detection device for boiler flue gas treatment. The inlet of the waste heat exchanger is fixedly connected to a flue gas channel conductive pipe. A first flue gas channel pipeline is fixedly connected between the flue gas outlet at the top of the boiler and the flue gas channel conductive pipe inlet. A second flue gas channel pipeline is fixedly connected between the flue gas outlet of the waste heat exchanger and the flue gas inlet of the dust collector. The flue gas outlet of the dust collector is fixedly connected to an exhaust pipe.

[0012] The following are further optimizations and / or improvements to the above-mentioned utility model technical solution:

[0013] The aforementioned waste heat exchanger includes a tube side and a shell side. A condensate inlet pipeline is fixedly connected to the top of the waste heat exchanger, and the outlet of the condensate inlet pipeline is fixedly connected to the inlet of the tube side. A condensate return pipeline is fixedly connected to the bottom of the waste heat exchanger, and the outlet of the tube side is fixedly connected to the inlet of the condensate return pipeline.

[0014] The aforementioned shell-side flue gas inlet is fixedly connected to a flue gas channel conductive pipe, and a second flue gas pipeline is fixedly connected between the shell-side flue gas outlet and the dust collector inlet.

[0015] The aforementioned condensate inlet pipeline is fixedly installed with a control valve and a first temperature gauge in sequence according to the direction of medium flow.

[0016] A second thermometer is fixedly installed on the aforementioned second dust duct pipeline.

[0017] The aforementioned control valve, first thermometer, and second thermometer are all electrically connected to the controller.

[0018] This utility model has a reasonable and compact structure and is easy to use. It can efficiently and accurately detect water pipe leaks in boiler flue gas treatment systems, reduce the economic losses caused by water pipe leaks to boiler flue gas treatment systems, and improve the safe operation and productivity of boiler flue gas treatment systems. Attached Figure Description

[0019] Appendix Figure 1 This is a cross-sectional structural diagram of the present invention.

[0020] Appendix Figure 2 This is a schematic diagram of the process flow of this utility model.

[0021] Appendix Figure 1 and attached Figure 2 The codes in the diagram are as follows: 1 is the conductive pipe of the flue gas channel, 2 is the maintenance platform, 3 is the conductive detection rod, 4 is the conductive probe, 5 is the insulating support frame, 6 is the bottom wall, 7 is the maintenance platform, 8 is the insulating base plate, 9 is the baffle plate, 10 is the boiler, 11 is the waste heat exchanger, 12 is the dust collector, 13 is the first flue gas channel pipeline, 14 is the second flue gas channel pipeline, 15 is the exhaust pipeline, 16 is the tube side, 17 is the shell side, 18 is the condensate inlet pipeline, 19 is the condensate return pipeline, 20 is the control valve, 21 is the first thermometer, 22 is the second thermometer, 23 is the flue gas inlet, and 24 is the flue gas outlet. Detailed Implementation

[0022] This utility model is not limited to the following embodiments, and the specific implementation method can be determined according to the technical solution of this utility model and the actual situation.

[0023] Unless otherwise specified, all equipment and devices used in this invention are existing, publicly known, and commonly used equipment and devices in the field.

[0024] In this utility model, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 and attached Figure 2 The layout is described using a diagrammatic method, such as the positional relationships of front, back, top, bottom, left, and right, which are based on the instructions attached. Figure 1 and attached Figure 2 The orientation of the layout is determined by the direction of the map.

[0025] The present invention will be further described below with reference to the embodiments and accompanying drawings:

[0026] Example 1: As shown in the attached document Figure 1As shown, the water pipe leakage detection device for boiler flue gas treatment includes a flue gas channel conductive pipe 1, a maintenance platform 2, a conductive detection rod 3, and a conductive probe 4. The flue gas channel conductive pipe 1 is a horizontal pipe. The two ends of the conductive detection rod 3 are horizontally fixed to the inner wall of the flue gas channel conductive pipe 1 by insulating support frames 5. Vertically downward conductive probes 4 are arranged on the conductive detection rod 3 at intervals on the left and right. There is a gap between the bottom of the conductive probe 4 and the bottom wall 6 of the flue gas channel conductive pipe 1. A maintenance platform 7 is set on the bottom wall 6 of the flue gas channel conductive pipe 1 in front of the conductive probe 4. An anti-interference device is set on the bottom wall 6 between the maintenance platform 7 and the conductive probe 4.

[0027] As required, as attached Figure 1 As shown, the front end of the conductive tube 1 in the dust channel is the smoke inlet 23, and the rear end of the conductive tube 1 in the dust channel is the smoke outlet 24. The conductive probe 3 and the conductive probe 4 can be cylindrical or tubular. The conductive tube 1 in the dust channel, the conductive probe 3 and the conductive probe 4 can be made of conductive metal or non-metal materials. The insulating support frame 5 can be an insulating hanging frame or an insulating support frame. The insulating support frame 5 is used to horizontally fix the conductive probe 3 to the inner wall of the conductive tube 1 in the dust channel and to insulate the conductive probe 3 from the conductive tube 1 in the dust channel. Dust accumulates on the bottom wall 6. The conductive probe 4 comes into contact with the dust. Once the dust is wetted by water seepage, the conductive probe 3 can achieve electrical conduction with the conductive tube 1 in the dust channel.

[0028] As needed, staff can inspect or repair the conductive detection rod 3 and conductive probe 4 on the maintenance platform 7. The water pipe leak detection device for boiler flue gas treatment described above can be further optimized and / or improved according to actual needs.

[0029] Example 2: Its difference from Example 1 is as follows: (See attached) Figure 1 As shown, the anti-interference device includes an insulating base plate 8 and a barrier plate 9. The insulating base plate 8 is laid on the bottom wall 6 between the maintenance platform 7 and the conductive probe 4, and a vertical barrier plate 9 is installed between the insulating base plate 8 and the maintenance platform 7.

[0030] As needed, maintenance personnel often leave behind wires, welding rods, and other metal objects on the maintenance platform 7. The insulating base plate 8 and the vertical barrier plate 9 can prevent the metal objects on the maintenance platform 7 from interfering with the detection of the conductive probe 4.

[0031] Example 3: Its difference from Examples 1 to 2 is as follows: (See attached) Figure 1 As shown, the lengths of the insulating base plate 8 and the barrier plate 9 are both greater than the length of the conductive probe 3.

[0032] Example 4: Its difference from Examples 1 to 3 is as follows: (See attached) Figure 1As shown, it also includes a controller, and the conductive detection rod 3 and the conductive tube 1 of the smoke and dust channel are all electrically connected to the controller.

[0033] Example 5: As shown in the attached document Figure 1 , 2 As shown, the boiler dust treatment device includes a boiler 10, a waste heat exchanger 11, a dust collector 12, and a water pipe leakage detection device for boiler dust treatment. The inlet of the waste heat exchanger 11 is fixedly connected to a dust channel conductive pipe 1. A first dust channel pipeline 13 is fixedly connected between the top flue gas outlet of the boiler 10 and the flue gas inlet of the dust channel conductive pipe 1. A second dust channel pipeline 14 is fixedly connected between the flue gas outlet of the waste heat exchanger 11 and the flue gas inlet of the dust collector 12. The flue gas outlet of the dust collector 12 is fixedly connected to an exhaust pipe 15.

[0034] As needed, attached Figure 1 The front end of the conductive pipe 1 in the flue gas channel is the flue gas inlet 23, with attached... Figure 1 The rear port of the conductive tube 1 in the middle smoke and dust channel is the smoke outlet 24.

[0035] Depending on the requirements, the waste heat exchanger 11 can be a finned tube heat exchanger, which has high cooling efficiency for high-temperature flue dust. The dust collector 12 can be an electrostatic precipitator, which has a better dust removal effect on boiler flue dust. The water pipe leakage detection device for boiler flue dust treatment can detect water leakage faults in the waste heat exchanger 11 in real time.

[0036] The above-mentioned boiler flue gas treatment device can be further optimized and / or improved according to actual needs:

[0037] Example 6: Its difference from Example 5 is as follows: (See attached) Figure 2 As shown, the waste heat exchanger 11 includes a tube side 16 and a shell side 17. A condensate inlet pipeline 18 is fixedly connected to the top of the waste heat exchanger 11, and the outlet of the condensate inlet pipeline 18 is fixedly connected to the inlet of the tube side 116. A condensate return pipeline 19 is fixedly connected to the bottom of the waste heat exchanger 11, and the outlet of the tube side 16 is fixedly connected to the inlet of the condensate return pipeline 19.

[0038] As required, the tube side 16 includes several tubes. Due to the high temperature and dust environment in the shell side 17 and the circulating condensate in the tube side 16, the tube side 16 is prone to corrosion, leakage and damage. Once the tube side 16 leaks, the condensate in the tube side 16 seeps into the dust on the bottom wall 6 (a large amount of dust accumulates on the bottom and bottom wall 6 of the waste heat exchanger 11). When the conductive probe 4 comes into contact with the wet dust, the conductive probe rod 3 can achieve electrical connection with the conductive tube 1 of the dust channel.

[0039] Example 7: It differs from Examples 5 to 6 in that: as shown in the appendix Figure 2As shown, the smoke inlet of the shell side 17 is fixedly connected to the smoke and dust channel conductive pipe 1, and the smoke outlet of the shell side 17 is fixedly connected to the smoke inlet of the dust collector 12 via a second smoke and dust pipeline 14.

[0040] Example 8: It differs from Examples 5 to 7 in that: as shown in the appendix Figure 2 As shown, a control valve 20 and a first temperature gauge 21 are fixedly installed on the condensate inlet pipeline 18 in sequence according to the direction of medium flow.

[0041] Example 9: It differs from Examples 5 to 8 in that: as shown in the appendix Figure 2 As shown, a second thermometer 22 is fixedly installed on the second dust duct pipeline 14.

[0042] Example 10: It differs from Examples 5 to 9 in that: as shown in the appendix Figure 2 As shown, control valve 20, first thermometer 21, and second thermometer 22 are all electrically connected to the controller.

[0043] Depending on the needs, the pipelines and equipment of this boiler flue gas treatment device may also be equipped with conventional valves, thermometers, and pressure gauges known and commonly used in the field, according to production requirements. The controller is a PLC controller, and the model of the PLC controller can be GL-FJ-XL01. The Xinhua XDPS6000 DCS control system is installed in the PLC controller.

[0044] After this utility model is put into operation, it can efficiently and accurately detect water pipe leaks (leaks in several condensate tubes in the waste heat exchanger) in the boiler flue gas treatment system, reduce the economic losses caused by water pipe leaks to the boiler flue gas treatment system, and improve the safe operation and productivity of the boiler flue gas treatment system.

[0045] The above technical features constitute various embodiments of the present invention, which have strong adaptability and implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.

[0046] The usage process of this utility model is as follows: (see attached) Figure 2 As shown, firstly, the high-temperature flue gas emitted from the top of the boiler 10 enters the shell side 17 of the waste heat exchanger 11 through the first flue gas channel pipeline 13 and the flue gas channel conductive pipe 1. The circulating condensate in the tube side 16 condenses and cools the high-temperature flue gas flowing in the shell side 17. Next, the low-temperature flue gas cooled by the waste heat exchanger 11 enters the dust collector 12 through the second flue gas channel pipeline 14 for dust removal. Finally, the flue gas after being removed by the dust collector 12 enters the downstream process system through the exhaust pipeline 15 for flue gas treatment (desulfurization or denitrification).

[0047] The use of the above-mentioned utility model also includes: as shown in the appendix Figure 1 ,2 As shown, when a leak occurs in tube 16 (a series of tubes), the condensate in tube 16 leaks into the dust on the bottom wall of the waste heat exchanger 11. The bottom end of the conductive probe 4 comes into contact with the damp dust, and the conductive probe 3 is electrically connected to the conductive tube 1 of the dust channel. The staff learns from the controller that a leak has occurred in tube 16 and then inspects and repairs tube 16.

Claims

1. A water tube leak detection device for boiler flue gas treatment, characterized by The device comprises a smoke channel conductive pipe, an inspection platform, a conductive detection rod and a conductive probe.

2. A water tube leak detection apparatus for boiler flue gas treatment according to claim 1, characterized in that The device comprises an insulating bottom plate and a blocking plate.

3. A water tube leak detection apparatus for boiler flue gas treatment according to claim 1 or 2, characterized in that The length of the insulating bottom plate and the blocking plate is greater than the length of the conductive detection rod.

4. The boiler flue gas treatment water tube leak detection apparatus of claim 3, wherein The device further comprises a controller, and the conductive detection rod and the smoke channel conductive pipe are electrically connected to the controller.

5. A boiler flue gas treatment apparatus, characterized by The device comprises a boiler, a waste heat exchanger, a dust collector and the water pipe leakage detection device for boiler smoke treatment according to any one of claims 1 to 4.

6. A boiler flue gas treatment apparatus according to claim 5, characterised in that The waste heat exchanger comprises a tube pass and a shell pass.

7. A boiler flue gas treatment apparatus according to claim 6, characterised in that The shell pass inlet is fixedly connected with the smoke channel conductive pipe.

8. A boiler flue gas treatment apparatus according to claim 6 or 7, characterised in that The shell pass outlet is fixedly connected with the second smoke channel pipeline.

9. A boiler flue gas treatment apparatus according to claim 8, characterised in that The condensate water input pipeline is fixedly installed with a control valve and a first temperature meter in sequence according to the medium flow direction.

10. A boiler flue gas treatment apparatus according to claim 9, characterised in that The second smoke channel pipeline is fixedly installed with a second temperature meter. The control valve, the first temperature meter and the second temperature meter are electrically connected to the controller.

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