Chemical dosing device for thermal power plant

Abstract

The utility model discloses a chemical dosing device for thermal power plant belongs to thermal power plant chemical dosing technical field. Including mounting bracket, liquid storage bucket, communication pipe, water injection pipe and stirring barrel, the liquid storage bucket is equipped with a plurality of, installs respectively on the mounting bracket, the water injection pipe penetrates the mounting bracket and is connected with the stirring barrel, the stirring barrel installs on the mounting bracket, the inside of stirring barrel is equipped with stirring subassembly, and the outside is equipped with drainage pipe, the communication pipe is equipped with a plurality of, is equipped with flow regulating assembly in each communication pipe, one end of communication pipe connects the liquid storage bucket, and the other end connects the stirring barrel. The device structure simple, easy operation and installation nimble, can realize accurate control to different medicine dose and proportioning, guarantee medicine mixture even, improve the reaction activity and processing efficiency of medicine, satisfy the actual demand of thermal power plant water treatment system.

Description

Technical Field

[0001] This utility model belongs to the field of chemical dosing technology in thermal power plants, and specifically relates to a chemical dosing device for thermal power plants. Background Technology

[0002] In the production and operation of thermal power plants, chemical dosing is a key link in ensuring the safe and stable operation of thermal systems (such as boilers, condensers, pipelines, etc.). Its core purpose is to inhibit scaling, corrosion and microbial growth inside equipment by accurately adding various chemical agents (such as scale inhibitors, corrosion inhibitors, oxygen removers, bactericides, etc.) to the water treatment system, thereby reducing the risk of equipment failure, extending service life, and ensuring steam quality and unit operating efficiency.

[0003] However, current chemical dosing devices have significant shortcomings. Most existing chemical dosing devices use a single sealed tank as the storage component. When different types of chemicals need to be mixed, they are typically poured directly into the tank together with the solution for mixing. This method lacks an effective dosage control structure, making it impossible to precisely add different chemicals according to a preset ratio. This not only easily leads to imbalances in the chemical ratio but also to uneven mixing, thereby reducing the reactivity and processing efficiency of the chemical agents. Therefore, this application proposes a chemical dosing device for thermal power plants. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a chemical dosing device for thermal power plants. This device has a simple structure and is easy to operate. It allows for preset dosing ratios of different chemicals, enabling precise control of dosage and proportion, ensuring uniform mixing, maximizing chemical activity, and meeting the actual needs of water treatment systems in thermal power plants.

[0005] This utility model provides the following technical solution: A chemical dosing device for thermal power plants, characterized in that it includes a mounting frame, a liquid storage tank, a connecting pipe, a water injection pipe, and a stirring tank; Multiple liquid storage tanks are provided and are respectively installed on the mounting frame; the water injection pipe passes through the mounting frame and is connected to the stirring tank; the stirring tank is installed on the mounting frame, and the stirring tank is provided with a stirring component inside and a drain pipe outside; The communication pipe is provided in multiple parts, and each communication pipe is provided with a flow regulating component. One end of the communication pipe is connected to the liquid storage tank and the other end is connected to the stirring tank.

[0006] Furthermore, the mounting frame includes a support column, a first vertical part, a first horizontal part, and a second horizontal part. The two ends of the first vertical part are respectively connected to the first horizontal part and the second horizontal part. There are multiple support columns, and the two ends of each support column are respectively connected to the first horizontal part and the second horizontal part. The first horizontal part is provided with a port corresponding to the liquid storage tank. The connecting pipe is connected to the liquid storage tank through the port.

[0007] Furthermore, the top of the liquid storage tank is provided with a lid, and the side of the liquid storage tank is provided with a measuring cylinder, the bottom of which is connected to the bottom of the inner cavity of the liquid storage tank.

[0008] In the above technical solution, the measuring cylinder is connected to the inside of the storage tank, and the outer wall of the measuring cylinder is equipped with scale marks, so that the staff can clearly and intuitively observe the liquid level of the agent and monitor the dosage of the agent in the storage tank in real time, providing accurate data support for judging the timing of agent replenishment and controlling the dosage.

[0009] Furthermore, the connecting pipe includes a second vertical section and a third horizontal section connected together. The flow regulating assembly includes a piston tube, a sealing seat, and a hydraulic rod. The piston tube is installed inside the second vertical section and has multiple vertically distributed inlet holes. The sealing seat is installed on the outside of the connection between the second vertical section and the third horizontal section. One end of the hydraulic rod has a telescopic end that passes through the second vertical section and is connected to the piston tube. The other end of the hydraulic rod is fixed to the bottom of the sealing seat.

[0010] Furthermore, the telescopic end is provided with a plurality of support rods at one end near the piston tube. The support rods are evenly arranged circumferentially around the telescopic end and are fixedly connected to the piston tube.

[0011] In the above technical solution, the relative positions of the inlet hole of the piston tube and the opening of the connecting pipe can be adjusted by the lifting and lowering movement of the hydraulic rod, so as to achieve precise control of the flow area of ​​the agent and thus achieve flexible control of the agent flow rate, avoiding the problem of imbalance in the ratio of manual addition.

[0012] Furthermore, an anti-detachment plate is provided at the end of the piston tube that contacts the support rod, and multiple limiting blocks are provided on the inner wall of the second vertical part of the connecting tube. When the top of the piston tube is flush with the top of the connecting tube, the anti-detachment plate abuts against the upper part of the limiting block.

[0013] In the above technical solution, the limiting mechanism of the anti-detachment plate and the limiting block can effectively ensure the stability and safety of the flow regulation component, avoid the interruption of dosing or the failure of the dosing volume due to component failure, and ensure the continuity of the dosing process.

[0014] Furthermore, the stirring assembly includes a first motor, a rotating rod, and a stirring rod. The first motor is installed on the top of the stirring tank. One end of the rotating rod is fixed to the output end of the first motor, and the other end passes through the interior of the stirring tank. Multiple stirring rods are provided and are installed equidistantly on the rotating rod.

[0015] In the above technical solution, driven by the first motor, the stirring rod can operate in an all-round and efficient manner in the mixing tank, ensuring that the reagent and water are mixed evenly, thereby improving the reactivity of the reagent, solving the problem of low reagent treatment efficiency caused by uneven mixing in traditional methods, and ensuring the water treatment effect.

[0016] Furthermore, it also includes a solenoid valve, a spraying assembly, and a drive assembly. The solenoid valve is mounted on the side of the drain pipe, the spraying assembly is rotatably connected to the drain pipe, and the drive assembly is mounted on the mounting bracket and electrically connected to the spraying assembly.

[0017] Furthermore, the spraying assembly includes a rotary joint, a spraying pipe, and nozzles. The rotary joint is rotatably fitted onto the bottom end of the drain pipe, the spraying pipe is installed on the side of the rotary joint, and multiple nozzles are provided, with the multiple nozzles being equidistantly distributed at the bottom of the spraying pipe.

[0018] Furthermore, the drive assembly includes a second motor, a gear, and a gear ring. The second motor is fixedly mounted on the bottom of the mounting bracket, the gear is fixedly mounted on the output end of the second motor, and the gear ring is fixedly sleeved on the rotary joint and meshes with the gear.

[0019] In the above technical solution, the discharge of pesticides can be precisely controlled according to actual working needs through the cooperation of solenoid valves, spraying components and drive components; the multiple nozzles set up can perform 360° all-round spraying under the drive components, which can expand the coverage area of ​​a single spray and improve spraying efficiency.

[0020] Furthermore, the mounting bracket is provided with multiple hanging ears, and a controller is mounted on the mounting bracket. The controller is electrically connected to the stirring assembly and the flow regulating assembly.

[0021] Compared with the prior art, the beneficial effects of this utility model are: This invention employs multiple independent storage tanks to store different reagents separately, avoiding the reagent contamination problem caused by storing different reagents in a single tank. A flow regulation component is installed inside the connecting pipe. Driven by a hydraulic rod, the piston tube can achieve relative movement with the connecting pipe, thereby precisely controlling the relative position of the inlet hole on the piston tube and the opening of the connecting pipe. This allows for the regulation of the inlet volume and ratio of different reagents, ensuring maximum reagent reactivity while reducing the risk of equipment corrosion and scaling caused by improper reagent mixing. The synergistic effect of the flow regulation component and the stirring component enables the mixing of reagents in different ratios, improving the reactivity of the chemical reagents and achieving highly efficient treatment results to meet the actual needs of thermal power plant water treatment systems. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the chemical dosing device for thermal power plants in Embodiment 1 of this utility model; Figure 2 This is a schematic diagram of the connection between the mounting bracket and the drive assembly in Embodiment 1 of this utility model; Figure 3 This is a schematic diagram of the connection between the liquid storage tank and the stirring tank in Embodiment 1 of this utility model; Figure 4 This is a cross-sectional structural diagram of the connection between the liquid storage tank and the stirring tank in Embodiment 1 of this utility model; Figure 5 This is a cross-sectional structural diagram of the connection between the flow regulating component and the connecting pipe in Embodiment 1 of this utility model; Figure 6 This is a schematic diagram of the connection between the spraying component and the driving component in Embodiment 2 of this utility model; The following are labeled in the diagram: 1. Mounting bracket; 11. Hanging lug; 12. Support column; 13. Controller; 14. Port; 15. First horizontal section; 16. Second horizontal section; 21. Storage tank; 22. Tank lid; 23. Measuring cylinder; 24. Connecting pipe; 241. Limiting block; 31. Piston tube; 32. Sealing seat; 33. Hydraulic rod; 34. Support rod; 311. Liquid inlet; 312. Anti-detachment plate; 4. Stirring tank; 41. Drain pipe; 42. Solenoid valve; 5. Stirring assembly; 51. First motor; 52. Rotating rod; 53. Stirring rod; 6. Water injection pipe; 7. Spraying assembly; 71. Rotary joint; 72. Spraying pipe; 73. Nozzle; 8. Drive assembly; 81. Second motor; 82. Gear; 83. Gear ring. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0024] It should be noted that, in the description of the present utility model, the orientation or positional relationships indicated by the terms "front", "rear", "left", "right", "upper", "lower", "inner", "outer" and the like are based on the orientation or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present utility model and do not require the present utility model to be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the present utility model.

[0025] In the description of the present utility model, it should be understood that the terms "first", "second" and the like are only used for descriptive purposes, and cannot be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second" or the like may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality of" is two or more. As used herein, "comprising", "including", "having", "containing" and the like are all open-ended expressions, meaning including but not limited to.

[0026] Example 1

[0027] This embodiment provides a chemical dosing device for thermal power plants, which comprises a mounting frame 1, a liquid storage barrel 21, a communicating pipe 24, a water injection pipe 6, a liquid discharge pipe 41, a flow rate regulating assembly, a stirring barrel 4 and a stirring assembly 5.

[0028] As Figure 1 shown, the mounting frame 1 comprises support columns 12, a first vertical portion, a first horizontal portion 15 and a second horizontal portion 16. In this embodiment, the first vertical portion is connected with the first horizontal portion 15 and the second horizontal portion 16 respectively to form a "C" shape. There are 2 support columns 12, and two ends of each support column 12 are connected with the first horizontal portion 15 and the second horizontal portion 16 respectively, for supporting the first horizontal portion 15 and the second horizontal portion 16, so as to reinforce the structure of the mounting frame 1 and improve the overall stability.

[0029] Multiple openings 14 are provided on the first horizontal section 15, and the liquid storage tank 21 is installed on the openings 14, corresponding one-to-one with each opening 14. In this embodiment, there are two liquid storage tanks 21 and two openings 14, which are symmetrically distributed on the first horizontal section 15. Each liquid storage tank 21 can independently store different drugs, avoiding early contamination of drugs caused by mixed storage in a single tank. A stirring tank 4 is installed on the top of the second horizontal section 16 of the mounting frame 1. In this embodiment, the stirring tank 4 is installed at the top center of the second horizontal section 16. Multiple connecting pipes 24 are provided between the liquid storage tank 21 and the stirring tank 4. In this embodiment, there are two connecting pipes 24. One end of each connecting pipe 24 passes through the opening 14 on the first horizontal section 15 and connects to the bottom of the storage tank 21. The end of each connecting pipe 24 away from the storage tank 21 is connected to the upper part of both sides of the stirring tank 4. In this embodiment, the connecting pipe 24 is L-shaped and includes a second vertical section and a third horizontal section. Each connecting pipe 24 has a flow regulating component inside the second vertical section. The water injection pipe 6 is installed above the first horizontal section 15 and passes through the first horizontal section 15 to connect to the stirring tank 4. The top of the stirring tank 4 is provided with a stirring component 5, which extends into the interior of the stirring tank 4 and is used to stir and mix the liquid and agent flowing into the stirring tank 4 evenly. The bottom of the stirring tank 4 is fixedly connected to a drain pipe 41 that passes through the mounting bracket 1 for discharging the mixed chemical agent. In this embodiment, the key components such as the double storage tank 21, the stirring tank 4, and the flow regulating component are integrated by the "U"-shaped mounting bracket 1. The flow regulating component lays the foundation for precise volume control, and the stirring component 5 ensures that the agent and water are mixed evenly.

[0030] like Figure 1 and Figure 2 As shown, the first vertical section of the mounting frame 1 has hanging ears 11 on its side. In this embodiment, there are four hanging ears 11, which are respectively installed at the four corners of the side of the first vertical section. The design of the hanging ears 11 facilitates moving the device to a designated position and increases the flexibility of installation. The first horizontal section 15 has a controller 13 on its side. The controller 13 is electrically connected to the flow regulation component and the stirring component 5 and is used to control the operation of each component, realize the control of the flow regulation and stirring, improve the controllability and efficiency of the dosing process, and ensure the stable and reliable operation of the device.

[0031] like Figure 1 and Figure 3As shown, the top of the storage tank 21 is provided with a lid 22. In this embodiment, the lid 22 is connected to the storage tank 21 by a thread. Each lid 22 is equipped with a handle on its top, which facilitates the quick opening and closing of the storage tank 21 by staff to replenish the medicine, and also enhances the sealing of the storage tank 21, reducing the volatilization of the medicine and external pollution. A measuring cylinder 23 is fixedly installed on the side of the storage tank 21. In this embodiment, the measuring cylinder 23 is made of L-shaped transparent glass. The measuring cylinder 23 includes a third vertical part and a fourth horizontal part. The bottom end of the fourth horizontal part of each measuring cylinder is connected to the bottom of the inner cavity of the corresponding storage tank 21. The outer wall of the third vertical part is provided with graduation marks. The design of the measuring cylinder 23 being connected to the bottom of the inner cavity of the storage tank 21 allows for direct reflection of the real-time remaining amount of the agent in the tank without opening the lid 22, which greatly improves the convenience and efficiency of agent management and solves the inconvenience of having to open the lid to check the remaining amount of the agent. The transparent glass material makes it easy for staff to clearly observe the agent level, and the scale markings allow for accurate reading of the remaining amount of the agent, providing accurate data support for judging the timing of agent replenishment and controlling the dosage.

[0032] like Figure 4 and Figure 5 As shown, the flow regulating assembly includes a piston tube 31, a sealing seat 32, and a hydraulic rod 33. The connecting pipe 24 includes a second vertical section and a third horizontal section. In this embodiment, the diameter of the top opening of the second vertical section is smaller than the diameter of the inner wall of the second vertical section. The piston tube 31 is configured with its opening facing downwards and is installed inside the second vertical section, and the diameter of the piston tube 31 is the same as the diameter of the top opening of the second vertical section. The sealing seat 32 is installed on the outside of the connection between the second vertical section and the third horizontal section. One end of the hydraulic rod 33 has a telescopic end, which passes through the second vertical section of the connecting pipe 24 and is connected to the piston tube 31. The other end of the hydraulic rod 33 is fixed to the bottom of the sealing seat 32.

[0033] The piston tube 31 has multiple vertically distributed liquid inlet holes 311. In this embodiment, the multiple liquid inlet holes 311 are equidistantly distributed on the side of the piston tube 31. The telescopic end near the piston tube 31 has multiple support rods 34, which are evenly arranged circumferentially around the telescopic end and connected to the piston tube 31. In this embodiment, there are three support rods 34 arranged in a circular array, and the tops of the three support rods are fixedly connected to the bottom of the piston tube 31. Combined with the electrical connection between the controller 13 and the hydraulic rod 33, the hydraulic rod 33 moves up and down, driving the piston tube 31 to rise and fall. By utilizing the relative positional changes between the liquid inlet holes 311 on the side wall of the piston tube 31 and the opening of the connecting pipe 24, the flow area of ​​the medicine can be precisely adjusted. For example, when the piston tube rises, more liquid inlet holes are exposed, increasing the flow rate; when it falls, the flow rate decreases. Compared to traditional devices that lack precise flow control, this invention enables flexible regulation of reagent flow. Based on the actual needs of the power plant water treatment system, different reagent dosage ratios can be preset (e.g., scale inhibitor and corrosion inhibitor are added at a ratio of 3:1), avoiding imbalances caused by manual addition based on experience. This provides key technical support for achieving preset reagent ratios, ensuring maximum reagent reactivity and reducing the risk of equipment corrosion and scaling due to improper ratios.

[0034] like Figure 5 As shown, an anti-detachment plate 312 is provided at the end of the piston tube 31 that contacts the support rod 34. In this embodiment, the anti-detachment plate 312 is integrally connected to the bottom of the outer wall of the piston tube 31, and the diameter of the anti-detachment plate is the same as the diameter of the inner wall of the second vertical part of the connecting pipe 24. Multiple limiting blocks 241 are provided on the inner wall of the second vertical part of the connecting pipe 24. In this embodiment, a limiting block 241 is provided on both sides of each second vertical part. When the top of the piston tube 31 is flush with the top of the connecting pipe 24, the anti-detachment plate 312 at the bottom of the piston tube 31 abuts against the top of the limiting block 241. The anti-detachment plate 312 at the bottom of the piston tube 31 and the limiting block 241 on the inner wall of the connecting pipe 24 cooperate to form a limiting mechanism for the lifting and lowering of the piston tube 31. The design of this limiting mechanism effectively prevents the piston tube 31 from detaching or jamming due to excessive movement, ensuring the stability and safety of the flow regulation component, avoiding interruption of dosing or failure of dosage control due to component failure, and ensuring the continuity of the dosing process.

[0035] like Figure 3 and Figure 4 As shown, in this embodiment, the third horizontal section of the connecting pipe 24 is all set to a downward inclined state, and the bottom of the inner cavity of the stirring tank 4 is set in a funnel shape. The downward inclined design of the third horizontal section of the connecting pipe 24 allows the medicine to flow smoothly into the stirring tank 4 by gravity; the funnel-shaped structure at the bottom of the stirring tank 4 facilitates the rapid convergence of the mixed medicine to the drain pipe 41.

[0036] like Figure 4As shown, the stirring assembly 5 includes a first motor 51, a rotating rod 52, and stirring rods 53. The first motor 51 is mounted on the top of the stirring tank 4. One end of the rotating rod 52 is fixed to the output end of the first motor 51, and the other end extends through and into the interior of the stirring tank 4. Multiple stirring rods 53 are provided and are equidistantly mounted on the rotating rod 52. A quantitative aqueous solution is pre-injected into the stirring tank 4 through the water injection pipe 6. Different reagents converge into the stirring tank 4 through two connecting pipes 24. The stirring assembly 5 drives the rotating rod 52 to rotate via the first motor 51. Multiple sets of stirring rods 53 are evenly distributed on the rotating rod 52, which can stir the reagents and water in the stirring tank 4. As the reagents continuously flow in, the stirring assembly 5 can evenly mix the reagents and solutions. The first motor 51 drives the rotating rod 52 and drives the stirring rods 53 to rotate synchronously, which can perform all-round and efficient stirring of the reagents and water in the stirring tank 4, ensuring that different reagents and water are fully mixed, improving the reactivity of the reagents, solving the problem of low reagent treatment efficiency caused by uneven mixing in traditional methods, and ensuring the water treatment effect.

[0037] Example 2

[0038] This embodiment provides a chemical dosing device for thermal power plants, including the structure in Embodiment 1, and further including a solenoid valve 42, a spraying assembly 7, and a drive assembly 8.

[0039] like Figure 1 and Figure 6 As shown, the solenoid valve 42 is mounted on the drain pipe 41, and the spraying assembly 7 is rotatably connected to the drain pipe 41. The drive assembly 8 is mounted on the bottom of the second horizontal section 16 of the mounting bracket 1 and is electrically connected to the spraying assembly 7 and the controller 13. The spraying assembly 7 includes a rotary joint 71, a spraying pipe 72, and nozzles 73. The rotary joint 71 is rotatably sleeved on the bottom end of the drain pipe 41. In this embodiment, the solenoid valve 42 is located on the side wall of the drain pipe 41 and above the rotary joint 71. The spraying pipe 72 is horizontally mounted on the side of the rotary joint 71. Multiple nozzles 73 are provided and are equidistantly distributed at the bottom of the spraying pipe 72. The spraying assembly 7 is rotatably connected to the drain pipe 41 via a rotary joint 71. Together with the multiple nozzles 73 at the bottom of the horizontal spraying pipe 72, it expands the coverage area of ​​a single spray. The solenoid valve 42 on the drain pipe 41 can precisely control the start and stop of the discharge of the agent, making it easy to flexibly adjust the spraying timing according to the water treatment needs, improving the controllability and flexibility of the spraying process, and adapting to the dosing needs of different scenarios.

[0040] like Figure 2 and Figure 6As shown, the drive assembly 8 includes a second motor 81, a gear 82, and a gear ring 83. The second motor 81 is fixedly mounted on the bottom of the second horizontal section 16 of the mounting bracket 1. The gear 82 is fixedly mounted on the output end of the second motor 81. The gear ring 83 is fixedly sleeved on the rotary joint 71, and the side wall of the gear ring 83 meshes with the side wall of the gear 82. In the drive assembly 8, the second motor 81 drives the gear 82 to rotate. Through the meshing transmission between the gear 82 and the gear ring 83, the rotary joint 71 and the spray pipe 72 are driven to rotate, realizing 360° all-round dynamic spraying of the spray pipe 72, increasing the spraying range of the agent, significantly improving the coverage uniformity of the agent in the water treatment system, enhancing the treatment effect of the agent, and meeting the core requirement of thermal power plants for precise dosing of different agents.

[0041] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A chemical dosing device for thermal power plants, characterized in that, Includes mounting bracket (1), liquid storage tank (21), connecting pipe (24), water injection pipe (6) and stirring tank (4); Multiple liquid storage tanks (21) are provided and are respectively installed on the mounting frame (1); the water injection pipe (6) passes through the mounting frame (1) and is connected to the stirring tank (4); the stirring tank (4) is installed on the mounting frame (1), and the stirring tank (4) is provided with a stirring component (5) inside and a drain pipe (41) outside. Multiple connecting pipes (24) are provided, and each connecting pipe (24) is provided with a flow regulating component. One end of the connecting pipe (24) is connected to the liquid storage tank (21), and the other end is connected to the stirring tank (4).

2. The chemical dosing device for thermal power plants according to claim 1, characterized in that, The mounting bracket (1) includes a support column (12), a first vertical part, a first horizontal part (15), and a second horizontal part (16). The two ends of the first vertical part are respectively connected to the first horizontal part (15) and the second horizontal part (16). There are multiple support columns (12). The two ends of each support column (12) are respectively connected to the first horizontal part (15) and the second horizontal part (16). The first horizontal part (15) is provided with a through-hole (14) corresponding to the liquid storage tank (21). The connecting pipe (24) is connected to the liquid storage tank (21) through the through-hole (14). And / or, the top of the liquid storage tank (21) is provided with a lid (22), and the side of the liquid storage tank (21) is provided with a measuring cylinder (23), the bottom of the measuring cylinder (23) is connected to the bottom of the inner cavity of the liquid storage tank (21).

3. The chemical dosing device for thermal power plants according to claim 1, characterized in that, The connecting pipe (24) includes a second vertical part and a third horizontal part connected together. The flow regulating assembly includes a piston tube (31), a sealing seat (32) and a hydraulic rod (33). The piston tube (31) is installed inside the second vertical part. The piston tube (31) is provided with a plurality of vertically distributed liquid inlet holes (311). The sealing seat (32) is installed on the outside of the connection between the second vertical part and the third horizontal part. One end of the hydraulic rod (33) is provided with a telescopic end. The telescopic end passes through the second vertical part and is connected to the piston tube (31). The other end of the hydraulic rod (33) is fixed to the bottom of the sealing seat (32).

4. The chemical dosing device for thermal power plants according to claim 3, characterized in that, The telescopic end is provided with a plurality of support rods (34) at one end near the piston tube (31). The support rods (34) are evenly arranged around the periphery of the telescopic end and are fixedly connected to the piston tube (31).

5. The chemical dosing device for thermal power plants according to claim 4, characterized in that, The piston tube (31) is provided with an anti-detachment plate (312) at one end that contacts the support rod (34). The inner wall of the second vertical part of the connecting tube (24) is provided with multiple limiting blocks (241). When the top of the piston tube (31) is flush with the top of the connecting tube (24), the anti-detachment plate (312) abuts against the limiting block (241).

6. The chemical dosing device for thermal power plants according to claim 1, characterized in that, The stirring assembly (5) includes a first motor (51), a rotating rod (52) and a stirring rod (53). The first motor (51) is installed on the top of the stirring tank (4). One end of the rotating rod (52) is fixed to the output end of the first motor (51), and the other end passes through the interior of the stirring tank (4). Multiple stirring rods (53) are provided and are installed equidistantly on the rotating rod (52).

7. The chemical dosing device for thermal power plants according to claim 1, characterized in that, It also includes a solenoid valve (42), a spraying assembly (7) and a drive assembly (8). The solenoid valve (42) is mounted on the side of the drain pipe (41). The spraying assembly (7) is rotatably connected to the drain pipe (41). The drive assembly (8) is mounted on the mounting bracket (1) and is electrically connected to the spraying assembly (7).

8. The chemical dosing device for thermal power plants according to claim 7, characterized in that, The spraying assembly (7) includes a rotary joint (71), a spraying pipe (72), and a nozzle (73). The rotary joint (71) is rotatably sleeved at the bottom end of the drain pipe (41). The spraying pipe (72) is installed on the side of the rotary joint (71). Multiple nozzles (73) are provided, and the multiple nozzles (73) are equidistantly distributed at the bottom of the spraying pipe (72).

9. The chemical dosing device for thermal power plants according to claim 8, characterized in that, The drive assembly (8) includes a second motor (81), a gear (82) and a gear ring (83). The second motor (81) is fixedly mounted on the bottom of the mounting bracket (1). The gear (82) is fixedly mounted on the output end of the second motor (81). The gear ring (83) is fixedly sleeved on the rotary joint (71) and meshes with the gear (82).

10. The chemical dosing device for thermal power plants according to claim 1, characterized in that, The mounting bracket (1) is provided with a plurality of hanging ears (11), and a controller (13) is installed on the mounting bracket (1). The controller (13) is electrically connected to the stirring assembly (5) and the flow regulating assembly.

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