A water treatment assay sampling device for a thermal power plant

Abstract

The utility model relates to the technical field of thermal power plant equipment, concretely is a kind of thermal power plant heating water treatment is used to test sampling device, including sampling box, its top left side fixedly connected with input pipe, the left side bottom of sampling box is fixedly connected with output pipe, the inside lower portion of sampling box is provided with mixing mechanism;Filtering box is fixedly connected in the right side of sampling box side by side, the inside lower portion of filtering box is provided with filter mechanism, transmission mechanism is arranged between the filter mechanism and mixing mechanism. The utility model is directly sampled by the partition design of sampling box and filtering box and the cooperation use of manual valve, reaches the effect of keeping the original characteristics of water sample, solves the problem that the detection target substance is removed due to multilayer filtration in the prior art and affects the accuracy of test.

Description

Technical Field

[0001] This utility model relates to the field of thermal power plant equipment technology, specifically to a testing and sampling device for heating water treatment in thermal power plants. Background Technology

[0002] In the thermal power plant's thermal system, water and steam are the main working media, and their quality directly affects the performance of the heat engine and the overall efficiency of the system. Substandard water and steam quality may lead to corrosion, scaling, and other problems in key equipment such as boilers, steam drums, and steam turbines, thereby affecting the safe and stable operation of the equipment. Therefore, it is necessary to cool and depressurize water and steam, and to conduct online continuous sampling and instrument analysis and monitoring to ensure their quality.

[0003] As disclosed in CN118681308B, a laboratory sampling device for heating water treatment in a thermal power plant includes a filtration mechanism and two cleaning mechanisms. The two cleaning mechanisms are respectively located above and below one side of the filtration mechanism. The filtration mechanism includes a filter cylinder, with mounting plates fixedly connected to both the upper and lower parts of the filter cylinder's interior. The beneficial effect of this invention, achieved by adopting the above technical solution, is that it allows for the replacement of the arc-shaped multi-layer filter plate during the filtration process, avoiding any disruption to the continued filtration of the sampled water during the replacement process.

[0004] Although the aforementioned patent allows for the replacement of arc-shaped multi-layer filter plates during the filtration process of the sampled water, the fundamental purpose of water and steam sampling in thermal power plants is to detect the content of impurities in the water (such as iron, silicon, chloride ions, etc.) in order to determine the corrosion / scaling status of the system. However, the aforementioned patent uses multi-layer filter plates to repeatedly filter impurities and remove them in a concentrated manner, which in fact artificially removes the target substances to be tested, resulting in serious distortion of the test results. Utility Model Content

[0005] The purpose of this invention is to provide a laboratory sampling device for heating water treatment in thermal power plants, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A laboratory sampling device for heating water treatment in thermal power plants, comprising:

[0008] A sampling box has an input tube fixedly connected to its top left side and an output tube fixedly connected to its bottom left side. A mixing mechanism is provided inside the lower part of the sampling box.

[0009] A filter box is fixedly connected to the right side of the sampling box. A filtration mechanism is provided inside the lower part of the filter box, and a transmission mechanism is provided between the filtration mechanism and the mixing mechanism.

[0010] Preferably, the mixing mechanism includes a rotating rod rotatably connected to the lower part of the sampling box via a bearing, and a plurality of stirring rods evenly arranged along the axial direction of the rotating rod. An electric valve is fixedly connected to the input end of the input pipe, and a manual valve is fixedly connected to the output end of the output pipe.

[0011] Preferably, an overflow port is provided through the upper end of the sampling box and the filter box, a drain pipe is fixedly connected to the lower left side of the filter box, an electric valve is fixedly connected to the output end of the drain pipe, and a liquid level sensor is fixedly connected to the upper right side of the filter box.

[0012] Preferably, the filtration mechanism includes a drum filter screen rotatably connected to the lower part of the filter box, and brush rollers symmetrically arranged on both sides of the drum filter screen. A water pump is fixedly connected to the middle of the bottom of the filter box, and a water pump is fixedly connected to the input end of the water pump. The other end of the water pump passes through the filter box and extends into the interior of the drum filter screen. The connection between the drum filter screen and the water pump is rotatably engaged.

[0013] Preferably, the output end of the water pump is fixedly connected to a water outlet pipe, and the output end of the water outlet pipe is fixedly connected to an electric valve.

[0014] Preferably, the transmission mechanism includes a transmission box that is laterally fixed between the front of the sampling box and the filter box. Inside the transmission box, four worm gears are rotatably connected via bearings. The upper inside of the transmission box is rotatably connected via bearings to a worm that meshes with the four worm gears. A motor is fixedly connected to the upper right side of the transmission box. The output shaft of the motor is fixedly connected to the worm. The four worm gears are respectively fixedly connected to a rotating rod, two brush rollers, and a drum filter screen.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This laboratory sampling device for heating water treatment in thermal power plants, through the combination of a partitioned design of the sampling box and the filter box and the direct sampling method of the manual valve, achieves the effect of maintaining the original characteristics of the water sample, and solves the problem in the prior art that the target substances to be detected are removed due to multi-layer filtration, which affects the accuracy of the test.

[0017] 2. This laboratory sampling device for heating water treatment in thermal power plants achieves real-time automatic cleaning of the filter screen during the filtration process through the synchronous rotation of the drum filter screen and the brush roller. This prevents filter screen clogging and maintains filtration efficiency, solving the problem of decreased filtration efficiency and the need for frequent shutdowns for cleaning caused by filter screen clogging in the prior art. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall main structure of this utility model;

[0019] Figure 2 This is a schematic cross-sectional view of the overall structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the worm gear mounting structure of this utility model;

[0021] Figure 4 For the present utility model Figure 2 Enlarged diagram of point A in the middle.

[0022] In the diagram: 1. Sampling box; 2. Input pipe; 3. Output pipe; 4. Filter box; 5. Rotating rod; 6. Stirring rod; 7. Electric valve one; 8. Manual valve; 9. Overflow port; 10. Drain pipe; 11. Electric valve three; 12. Liquid level sensor; 13. Drum filter screen; 14. Brush roller; 15. Water pump; 16. Pumping pipe; 17. Discharge pipe; 18. Electric valve two; 19. Transmission box; 20. Worm gear; 21. Worm; 22. Motor. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figure 1-4 As shown, this utility model provides a technical solution:

[0025] A sampling device for heating water treatment in a thermal power plant includes a sampling box 1, with an input pipe 2 fixedly connected to the top left side and an output pipe 3 fixedly connected to the bottom left side of the sampling box 1. A mixing mechanism is installed inside the lower part of the sampling box 1, comprising a rotating rod 5 rotatably connected to the lower part of the sampling box 1 via bearings, and several stirring rods 6 evenly arranged along the axial direction of the rotating rod 5. An electric valve 7 is fixedly connected to the input end of the input pipe 2, and a manual valve 8 is fixedly connected to the output end of the output pipe 3. An overflow port 9 is provided between the upper ends of the sampling box 1 and the filter box 4. A drain pipe 10 is fixedly connected to the lower left side of the filter box 4, and an electric valve 11 is fixedly connected to the output end of the drain pipe 10. A liquid level sensor 12 is fixedly connected to the upper right side of the filter box 4. The filter box 4 is fixedly connected side-by-side to the right side of the sampling box 1. A filtering mechanism is installed inside the lower part of the filter box 4, comprising a roller filter screen 13 rotatably connected to the lower part of the filter box 4, and several stirring rods symmetrically arranged on the roller filter screen 13. The filter screen 13 has brush rollers 14 on both sides. A water pump 15 is fixedly connected to the bottom center of the filter box 4. A water pump 16 is fixedly connected to the input end of the water pump 15. The other end of the water pump 16 passes through the filter box 4 and extends into the interior of the drum filter screen 13. The connection between the drum filter screen 13 and the water pump 16 is rotatably fitted. A water outlet pipe 17 is fixedly connected to the output end of the water pump 15. An electric valve 18 is fixedly connected to the output end of the water outlet pipe 17. A transmission mechanism is provided between the filtration mechanism and the mixing mechanism. The structure includes a transmission box 19 that is horizontally fixed between the front of the sampling box 1 and the filter box 4. Inside the transmission box 19, four worm gears 20 are rotatably connected via bearings. Inside the transmission box 19, at the upper end, a worm 21 that meshes with the four worm gears 20 is rotatably connected via bearings. On the upper right side of the transmission box 19, a motor 22 is fixedly connected. The output shaft of the motor 22 is fixedly connected to the worm 21. The four worm gears 20 are fixedly connected to the rotating rod 5, the two brush rollers 14, and the drum filter screen 13, respectively.

[0026] In this embodiment, the combination of the partitioned design of the sampling box 1 and the filter box 4 and the direct sampling method of the manual valve 8 achieves the effect of maintaining the original characteristics of the water sample, and solves the problem in the prior art that the detection target substance is removed due to multi-layer filtration, which affects the accuracy of the test.

[0027] Furthermore, by using the synchronous rotation of the roller filter screen 13 and the brush roller 14, real-time automatic cleaning of the filter screen is achieved during the filtration process, which prevents filter screen clogging and maintains filtration efficiency. This solves the problem in the prior art where filter screen clogging leads to decreased filtration efficiency and requires frequent shutdowns for cleaning.

[0028] Working principle: When water sample collection is required, electric valve 7 opens, and the water sample to be tested enters the sampling box 1 for storage through input pipe 2; when water sample testing is required, manual valve 8 is opened, and the water sample stored in the sampling box 1 is output through output pipe 3 for analysis; when the liquid level in the sampling box 1 is too high, excess water sample flows naturally into the filter box 4 through overflow port 9; when the water level inside the filter box 4 is higher than the set threshold of the liquid level sensor 12, the PLC control system automatically starts motor 22 and water pump 15; motor 22 drives worm gear 20 to rotate through worm 21. The roller filter 13 and brush roller 14 rotate synchronously, and the rotating rod 5 and stirring rod 6 inside the sampling box 1 operate synchronously to stir the water sample, preventing impurities from settling in the sampling box 1 and affecting the accuracy of subsequent testing. The water pump 15 draws the water sample from the inside of the roller filter 13 through the water pumping pipe 16 and discharges it through the water outlet pipe 17 and the electric valve 18. During this process, the roller filter 13 filters the water sample, and the brush roller 14 cleans the surface of the filter to prevent clogging. When it is necessary to remove deposited impurities, the electric valve 11 is opened to discharge the impurities through the drain pipe 10.

[0029] It should be noted that the PLC control system adopts liquid level linkage control logic: when the liquid level sensor 12 in the filter box 4 detects that the water level has reached the preset high level, the PLC automatically starts the motor 22 and the water pump 15 at the same time. The motor 22 drives the drum filter screen 13, the brush roller 14 and the rotating rod 5 to rotate, while the water pump 15 pumps out the filtered water. When the water level drops to the preset low level, the PLC automatically stops the motor 22 and the water pump 15 at the same time. This control logic realizes the automatic start and stop of the filtration system through a liquid level sensor 12, which not only ensures the filtration efficiency, but also avoids the equipment running idle.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A testing and sampling device for heating water treatment in thermal power plants, characterized in that: include The sampling box (1) has an input tube (2) fixedly connected to the top left side, and an output tube (3) fixedly connected to the bottom left side of the sampling box (1). A mixing mechanism is provided inside the sampling box (1) at the bottom. A filter box (4) is fixedly connected to the right side of the sampling box (1). A filter mechanism is provided inside the filter box (4) at the bottom. A transmission mechanism is provided between the filter mechanism and the mixing mechanism.

2. The testing and sampling device for heating water treatment in thermal power plants according to claim 1, characterized in that: The mixing mechanism includes a rotating rod (5) rotatably connected to the lower part of the sampling box (1) via a bearing, and several stirring rods (6) evenly arranged along the axial direction of the rotating rod (5). An electric valve (7) is fixedly connected to the input end of the input pipe (2), and a manual valve (8) is fixedly connected to the output end of the output pipe (3).

3. The testing and sampling device for heating water treatment in thermal power plants according to claim 2, characterized in that: An overflow port (9) is provided between the upper ends of the sampling box (1) and the filter box (4). A drain pipe (10) is fixedly connected to the lower left side of the filter box (4). An electric valve (11) is fixedly connected to the output end of the drain pipe (10). A liquid level sensor (12) is fixedly connected to the upper right side of the filter box (4).

4. The testing and sampling device for heating water treatment in thermal power plants according to claim 1, characterized in that: The filtration mechanism includes a roller filter screen (13) rotatably connected to the bottom of the filter box (4), and brush rollers (14) symmetrically arranged on both sides of the roller filter screen (13). A water pump (15) is fixedly connected to the middle of the bottom of the filter box (4). A water pump pipe (16) is fixedly connected to the input end of the water pump (15). The other end of the water pump pipe (16) passes through the filter box (4) and extends into the interior of the roller filter screen (13). The connection between the roller filter screen (13) and the water pump pipe (16) is rotatably engaged.

5. A testing and sampling device for heating water treatment in a thermal power plant according to claim 4, characterized in that: The output end of the water pump (15) is fixedly connected to the water outlet pipe (17), and the output end of the water outlet pipe (17) is fixedly connected to the electric valve (18).

6. The testing and sampling device for heating water treatment in thermal power plants according to claim 4, characterized in that: The transmission mechanism includes a transmission box (19) that is horizontally fixed between the front of the sampling box (1) and the filter box (4). Inside the transmission box (19), four worm gears (20) are rotatably connected by bearings. The upper part of the transmission box (19) is rotatably connected by bearings to a worm (21) that meshes with the four worm gears (20). The upper part of the right side of the transmission box (19) is fixedly connected to a motor (22). The output shaft of the motor (22) is fixedly connected to the worm (21). The four worm gears (20) are fixedly connected to the rotating rod (5), two brush rollers (14), and the drum filter screen (13), respectively.

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