Gravity flow type dosing device suitable for circulating water system
By designing a gravity self-flow dosing device for circulating water systems, using the electric regulating valve for gravity and level meter adjustment, the automatic uniform dosing of the agent is achieved, solving the problems of large manpower consumption and frequent equipment maintenance in the prior art, and ensuring the stability of the water quality of the circulating water.
Patent Information
- Application Number
- CN202422036788.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-21
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-08-21
AI Technical Summary
The dosing method of drug administration in the existing circulating water systems has problems such as large labor consumption, poor uniformity and frequent equipment maintenance, making it difficult to achieve automatic uniform drug delivery.
A gravity self-flow dosing device is designed, including a medicine storage tank, a vertical drainage pipe with an electric regulating valve and a dosing pipe. The agent automatically flows into the circulating water flow channel through gravity, and uniform drug dosing with small flow through the liquid level gauge and the electric regulating valve.
It realizes automatic and even drug delivery of medicine, reduces manpower consumption, reduces equipment maintenance costs, and ensures the water quality of circulating water.
Smart Images
Figure CN222984288U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of circulating water treatment, and particularly relates to a gravity self-flowing chemical dosing device applicable to a circulating water system. Background Art
[0002] For power stations, cooling towers are common equipment. The cooling water in the cooling tower sump often adopts a closed-loop circulating water supply method to conduct heat exchange for equipment such as condensers, oil coolers, and air coolers. The heated circulating water then undergoes heat exchange with the atmosphere in the cooling tower, and thus circulates for use. To meet the process requirements, the amount of cooling circulating water is extremely large. For a power station with a small capacity of 12 MW, the amount of cooling circulating water can reach 6900 t / h and needs to operate continuously throughout the year. Therefore, if the quality of the circulating water is not monitored, its quality will gradually scale severely and be overgrown with algae, ultimately leading to a decrease in water volume and the cooling effect not meeting the expected requirements, thus affecting the operation of the unit.
[0003] To monitor the circulating water, relevant indicators of the circulating water are measured every day in the power station, such as: temperature, pH, conductivity, turbidity, Cl - , hardness, COD, etc., in order to timely understand the quality of the circulating water. At the same time, to control the relevant indicators within a reasonable range, relevant chemicals need to be added, such as scale inhibitors, bactericides, etc. However, due to the large amount of circulating water, the addition of chemicals needs to be continuous and uniform to exert the maximum effect of the chemicals.
[0004] In the methods of adding chemicals to circulating water, there are two common ones. One is to add chemicals to the circulating water by manual pouring, and the other is to add chemicals to the circulating water by metering pumps. The former is extremely labor-intensive and there is also a risk that workers will be burned due to frequent contact with chemicals. In addition, it is impossible to add chemicals evenly during manual chemical addition, and usually, a whole barrel is poured in all at once. The latter can achieve uniform chemical addition, but due to the existence of equipment such as metering pumps, on the one hand, it increases the power consumption, and on the other hand, due to factors such as the corrosiveness of the chemicals, the chemical addition system requires frequent maintenance in the later stage, increasing the maintenance cost. Content of the Utility Model
[0005] The technical problem to be solved by the utility model is to provide a gravity self-flowing chemical dosing device applicable to a circulating water system, which has a compact structure, is convenient to operate, and can achieve automatic and uniform chemical dosing. To achieve the above purpose, the utility model can adopt the following technical solutions:
[0006] A gravity - self - flowing chemical dosing device applicable to a circulating water system, comprising: a chemical storage tank and a chemical dosing pipeline. The bottom of the chemical storage tank is connected to one end of the chemical dosing pipeline through a vertical liquid - discharging pipeline with an electric control valve. The other end of the chemical dosing pipeline is successively provided with multiple chemical dosing ports, and each chemical dosing port is correspondingly arranged in each circulating water flow channel of the cooling tower sump; A metering pipeline with a liquid level gauge is provided on the side of the chemical storage tank, and the metering pipeline is connected to the electric control valve. The electric control valve is associated and adjusted with the liquid level gauge, and the opening of the electric control valve is adjusted according to the liquid level height in the chemical storage tank; The chemical agent in the chemical storage tank flows into the chemical dosing pipeline through the electric control valve under the action of gravity, and then is transported into each circulating water flow channel, and finally flows into the circulating cooling water suction well.
[0007] As a further improvement of the present utility model, each chemical dosing port on the chemical dosing pipeline includes a plurality of liquid - discharging holes. The plurality of liquid - discharging holes of the chemical dosing port located at the end of the chemical dosing pipeline are arranged side by side in a straight line on the center line of the axial section of the chemical dosing pipeline. The plurality of liquid - discharging holes of the other chemical dosing ports are alternately and dispersedly arranged on both sides of the center line of the axial section of the chemical dosing pipeline in sequence, and the liquid - discharging holes on both sides form an included angle a with the center line of the axial section of the chemical dosing pipeline.
[0008] As a further improvement of the present utility model, the value of the included angle a is 1° ± 0.2°.
[0009] As a further improvement of the present utility model, the chemical dosing port includes a first chemical dosing port, a second chemical dosing port, a third chemical dosing port, a fourth chemical dosing port, and a fifth chemical dosing port arranged in sequence to correspond to each circulating water flow channel; The first chemical dosing port is located at the end of the chemical dosing pipeline, and the plurality of liquid - discharging holes of the first chemical dosing port are arranged side by side in a straight line on the center line of the axial section of the chemical dosing pipeline.
[0010] As a further improvement of the present utility model, a feed port is provided at the top of the chemical storage tank.
[0011] As a further improvement of the present utility model, an exhaust valve is provided at the top of the chemical storage tank.
[0012] As a further improvement of the present utility model, the chemical storage tank includes a first chemical storage tank and a second chemical storage tank with the same structure.
[0013] As a further improvement of the present utility model, both the chemical storage tank and the chemical dosing pipeline are prepared from PVC materials.
[0014] Compared with the prior art, the advantages of the present utility model are as follows:
[0015] The gravity self-flowing chemical dosing device applicable to the circulating water system of the present utility model is provided with a vertical liquid discharge pipe at the bottom of the chemical storage tank, and an electric control valve is arranged on the liquid discharge pipe for opening control. The output end of the liquid discharge pipe is connected to the input end of the chemical dosing pipe, and the output end of the chemical dosing pipe is connected to the circulating water flow channel in the cooling tower sump. At the same time, multiple chemical dosing ports are successively arranged at the output end of the chemical dosing pipe, and each chemical dosing port is correspondingly arranged in each circulating water flow channel of the cooling tower sump, that is, the chemical agent in the chemical storage tank is automatically added into the circulating water flow channel under the action of gravity and finally flows into the circulating cooling suction well. Further, a metering pipe with a liquid level gauge is arranged on the side of the chemical storage tank, and the metering pipe is connected to the electric control valve, that is, the electric control valve and the liquid level gauge are associated and adjusted. The electric control valve adjusts the opening according to the liquid level in the chemical storage tank. The higher the liquid level in the chemical storage tank, the smaller the opening of the electric control valve. When the electric control valve reaches a certain opening, the chemical agent slowly flows out under the action of its own gravity, that is, the chemical agent always maintains a small flow rate and slowly and evenly flows into the circulating water, achieving the effect of a continuous and slow flow, which is beneficial to the chemical agent to play a greater role and ensures that the water quality of the circulating water is stabilized within the expected range, while greatly reducing the labor consumption. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the main structure principle of the gravity self-flowing chemical dosing device applicable to the circulating water system in a specific embodiment of the present utility model;
[0017] Figure 2 It is a schematic diagram of the three-dimensional structure principle of the chemical dosing pipe in a specific embodiment of the present utility model;
[0018] Figure 3 It is a schematic diagram of the front view structure principle of the chemical dosing pipe in a specific embodiment of the present utility model;
[0019] LEGEND: 1. Liquid level gauge; 2. Feed inlet; 3. Exhaust valve; 4. Electric control valve; 5. Chemical dosing pipe; 6. First chemical storage tank; 7. Second chemical storage tank; 8. Cooling tower sump; 9. Cooling tower water spraying area; 10. Circulating cooling suction well; 11. Energy station circulating pump suction well; 51. First chemical dosing port; 52. Second chemical dosing port; 53. Third chemical dosing port; 54. Fourth chemical dosing port; 55. Fifth chemical dosing port. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0020] The present utility model will be further described below in conjunction with the accompanying drawings of the specification and specific preferred embodiments, but the protection scope of the present utility model is not limited thereby.
[0021] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "side", "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.
[0022] In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless otherwise specifically defined.
[0023] Embodiment
[0024] As Figures 1 to 3 shown, the gravity self-flowing chemical dosing device applicable to the circulating water system of the present utility model includes: a chemical storage tank and a chemical dosing pipeline 5. The bottom of the chemical storage tank is connected to one end of the chemical dosing pipeline 5 through a vertical drain pipeline with an electric control valve 4. The other end of the chemical dosing pipeline 5 is successively provided with a plurality of chemical dosing ports, and each chemical dosing port is correspondingly arranged in each circulating water flow path of the cooling tower sump 8. The circulating water in the cooling tower spraying area 9 converges to the cooling tower sump 8, and the circulating water in the cooling tower sump 8 is redistributed into the circulating cooling suction well 10 and the energy station circulating pump suction well 11, and the circulating cooling suction well 10 is correspondingly partitioned. In this embodiment, the circulating cooling suction well 10 is divided into a total of five zones, and the multiple chemical dosing ports on the chemical dosing pipeline 5 respectively correspond to the corresponding areas of the circulating cooling suction well 10 for fixed-point chemical dosing. A metering pipeline with a liquid level gauge 1 is provided on the side of the chemical storage tank, and the metering pipeline is connected to the electric control valve 4. Both the liquid level gauge 1 and the electric control valve 4 are connected to the control system in the remote central control room. The electric control valve 4 is associated with the liquid level gauge 1 for adjustment, and the electric control valve 4 adjusts the opening according to the level of the liquid in the chemical storage tank. The chemical agent in the chemical storage tank flows into the chemical dosing pipeline 5 through the electric control valve 4 under the action of gravity, and then is transported into each circulating water flow path and finally flows into the circulating cooling suction well 10. In this embodiment, both the chemical storage tank and the chemical dosing pipeline 5 are made of PVC material to prevent the chemical agent from corroding and extend the service life of the chemical dosing device.
[0025] In this embodiment, a vertical liquid discharge pipeline is provided at the bottom of the medicine storage tank, and an electric control valve 4 is arranged on the liquid discharge pipeline for opening control. The output end of the liquid discharge pipeline is connected to the input end of the medicine adding pipeline 5, and the output end of the medicine adding pipeline 5 is connected to the circulating water flow path of the cooling tower sump 8. At the same time, multiple medicine adding ports are successively arranged at the output end of the medicine adding pipeline 5, and each medicine adding port is correspondingly arranged in each circulating water flow path of the cooling tower sump 8, that is, the medicine in the medicine storage tank is automatically added into the circulating water flow path under the action of gravity and finally flows into the circulating cooling suction well 10. Further, a metering pipeline with a liquid level gauge 1 is arranged on the side of the medicine storage tank, and the metering pipeline is connected to the electric control valve 4, that is, the electric control valve 4 and the liquid level gauge 1 are associated and adjusted. The electric control valve 4 adjusts the opening according to the liquid level in the medicine storage tank. The higher the liquid level in the medicine storage tank, the smaller the opening of the electric control valve 4. When the electric control valve 4 reaches a certain opening, the medicine slowly flows out under the action of its own gravity, that is, the medicine always flows into the circulating water slowly and evenly with a small flow rate, achieving the effect of a continuous and gentle flow, which is beneficial for the medicine to play a greater effect, ensures that the water quality of the circulating water is stable within the expected range, and at the same time greatly reduces the labor consumption.
[0026] As Figure 2 and Figure 3 shown, each medicine adding port on the medicine adding pipeline 5 includes a plurality of liquid outlet holes. The plurality of liquid outlet holes of the medicine adding port located at the end of the medicine adding pipeline 5 are arranged side by side in a straight line on the center line of the axial section of the medicine adding pipeline 5. The plurality of liquid outlet holes of the other medicine adding ports are alternately dispersed on both sides of the center line of the axial section of the medicine adding pipeline 5 in sequence, and the liquid outlet holes on both sides form an angle a with the center line of the axial section of the medicine adding pipeline 5. Further, the value of the angle a is 1°±0.2°. The liquid outlet holes of each medicine adding port are slightly inclined, so as to balance the amount of medicine added in each area of the circulating cooling suction well 10 and achieve the purpose of uniform medicine addition.
[0027] As Figure 2 and Figure 3As shown in the figure, the chemical dosing ports of the chemical dosing pipeline 5 include a first chemical dosing port 51, a second chemical dosing port 52, a third chemical dosing port 53, a fourth chemical dosing port 54, and a fifth chemical dosing port 55 arranged in sequence. All five chemical dosing ports include four liquid outlet holes; the first chemical dosing port 51 corresponds to the 1-zone circulating water flow channel of the circulating cooling water suction well 10, the second chemical dosing port 52 corresponds to the 2-zone circulating water flow channel of the circulating cooling water suction well 10, the third chemical dosing port 53 corresponds to the 3-zone circulating water flow channel of the circulating cooling water suction well 10, the fourth chemical dosing port 54 corresponds to the 4-zone circulating water flow channel of the circulating cooling water suction well 10, and the fifth chemical dosing port 55 corresponds to the 5-zone circulating water flow channel of the circulating cooling water suction well 10. The first chemical dosing port 51 is located at the end of the chemical dosing pipeline 5, and the four liquid outlet holes of the first chemical dosing port 51 are arranged side by side in a straight line on the center line of the axial section of the chemical dosing pipeline 5; the four liquid outlet holes of the second chemical dosing port 52 are alternately dispersed on both sides of the center line of the axial section of the chemical dosing pipeline 5 in sequence; the four liquid outlet holes of the third chemical dosing port 53 are alternately dispersed on both sides of the center line of the axial section of the chemical dosing pipeline 5 in sequence, and the liquid outlet holes of the third chemical dosing port 53 deviate from the center line of the axial section of the chemical dosing pipeline 5 more than the liquid outlet holes of the second chemical dosing port 52; the four liquid outlet holes of the fourth chemical dosing port 54 are alternately dispersed on both sides of the center line of the axial section of the chemical dosing pipeline 5 in sequence, and the liquid outlet holes of the fourth chemical dosing port 54 deviate from the center line of the axial section of the chemical dosing pipeline 5 more than the liquid outlet holes of the third chemical dosing port 53; the four liquid outlet holes of the fifth chemical dosing port 55 are alternately dispersed on both sides of the center line of the axial section of the chemical dosing pipeline 5 in sequence, and the liquid outlet holes of the fifth chemical dosing port 55 deviate from the center line of the axial section of the chemical dosing pipeline 5 more than the liquid outlet holes of the fourth chemical dosing port 54. On the chemical dosing pipeline 5, the fifth chemical dosing port 55 is the closest to the medicine storage tank, and the first chemical dosing port 51 is the farthest from the medicine storage tank. The medicine is evenly added to the circulating water by gravity in a self-flowing manner. By slightly angling the liquid outlet at the end of the chemical dosing pipeline 5, it is convenient to balance the amount of medicine added in each zone.
[0028] As Figure 1 shown, the medicine storage tank includes a first medicine storage tank 6 and a second medicine storage tank 7 with the same structure. Both medicine storage tanks are connected to the chemical dosing pipeline 5, and a feed port 2 is provided at the top of both medicine storage tanks. When the vehicle transporting the medicine arrives near the medicine storage tank, the medicine is directly pumped into the medicine storage tank for storage by the transfer pump on the transport vehicle, and then through the control of valves and pipelines, the medicine is added to each circulating water flow channel in a self-flowing manner.
[0029] As Figure 1 shown, exhaust valves 3 are provided at the tops of the first medicine storage tank 6 and the second medicine storage tank 7 to facilitate the discharge of the gas pressure in the first medicine storage tank 6 and the second medicine storage tank 7 and facilitate the smooth outflow of the medicine.
[0030] In this embodiment, when the detection indexes of the circulating water are unqualified and chemicals need to be added, the dosage to be added is set in advance in the remote control system, and then the electric control valve 4 is remotely started, so that the electric control valve 4 adjusts its opening according to the liquid level of the chemical storage tank. After the electric control valve 4 has a certain opening, the chemicals slowly flow out under the action of their own gravity. At the same time, during the addition, the remote control system automatically detects the reading of the liquid level gauge 1 to control the total dosage. When the liquid level in the liquid level gauge 1 is too high or too low, an alarm can be issued to prompt the operator.
[0031] For some chemicals that need to be continuously added for a long time, such as scale inhibitors, the electric control valve 4 can be kept running for a long time, so that the chemicals can always flow into the circulating water slowly and evenly at a small flow rate, achieving the effect of continuous and slow addition, and greatly reducing the manpower at the same time. During this period, if other chemicals also need to be added, the electric control valves 4 of multiple chemical storage tanks can be opened simultaneously, and the chemicals can flow into the circulating water through the same chemical addition pipeline 5. The chemical addition device of this embodiment has a simple structural composition, basically no maintenance in the later stage, and realizes the effect of uniform chemical addition.
[0032] Although the present utility model is disclosed above with preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make many possible changes and modifications to the technical solution of the present utility model by using the methods and technical contents disclosed above, or modify it into an equivalent embodiment with equivalent changes. Therefore, any simple modification, equivalent replacement, equivalent change and modification made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model still fall within the scope of protection of the technical solution of the present utility model.
Claims
1. A gravity-flow dosing device suitable for a circulating water system, characterized in that: include: A medicine storage tank and a medicine adding pipeline (5), wherein the bottom of the medicine storage tank is connected to one end of the medicine adding pipeline (5) through a vertical liquid discharge pipeline with an electric regulating valve (4), and the other end of the medicine adding pipeline (5) is sequentially provided with a plurality of medicine adding ports, and each medicine adding port is correspondingly arranged in each circulating water flow channel of a cooling tower sump (8); a metering pipeline with a liquid level meter (1) is provided on the side of the medicine storage tank, and the metering pipeline is connected to the electric regulating valve (4), the electric regulating valve (4) and the liquid level meter (1) are adjusted in association, and the electric regulating valve (4) adjusts the opening according to the liquid level in the medicine storage tank; the medicine in the medicine storage tank flows into the medicine adding pipeline (5) through the electric regulating valve (4) under the action of gravity, and is then transported to each circulating water flow channel, and finally flows into the circulating cooling water absorption well (10).
2. The gravity-fed dosing device suitable for a circulating water system according to claim 1, characterized in that: Each dosing port on the dosing pipeline (5) comprises a plurality of liquid outlet holes, the plurality of liquid outlet holes of the dosing port located at the end of the dosing pipeline (5) are arranged side by side along a straight line on the center line of the axial cross section of the dosing pipeline (5), and the plurality of liquid outlet holes of the remaining dosing ports are alternately distributed on both sides of the center line of the axial cross section of the dosing pipeline (5), and the liquid outlet holes on both sides form an angle a with the center line of the axial cross section of the dosing pipeline (5).
3. The gravity-flow dosing device suitable for a circulating water system according to claim 2, characterized in that: The value of the angle a is 1°±0.2°.
4. The gravity-flow dosing device suitable for a circulating water system according to claim 2, characterized in that: The dosing port of the dosing pipeline (5) comprises a first dosing port (51), a second dosing port (52), a third dosing port (53), a fourth dosing port (54) and a fifth dosing port (55) which are arranged in sequence to correspond to the respective circulating water flow channels; the first dosing port (51) is located at the end of the dosing pipeline (5), and a plurality of liquid outlet holes of the first dosing port (51) are arranged side by side along a straight line on the center line of the axial cross section of the dosing pipeline (5).
5. The gravity-flow dosing device suitable for a circulating water system according to any one of claims 1 to 4, characterized in that: A feed inlet (2) is provided on the top of the medicine storage tank.
6. The gravity-flow dosing device suitable for a circulating water system according to any one of claims 1 to 4, characterized in that: An exhaust valve (3) is provided on the top of the medicine storage tank.
7. The gravity-flow dosing device suitable for a circulating water system according to any one of claims 1 to 4, characterized in that: The medicine storage tank comprises a first medicine storage tank (6) and a second medicine storage tank (7) having the same structure.
8. The gravity-flow dosing device suitable for a circulating water system according to any one of claims 1 to 4, characterized in that: The medicine storage tank and the medicine adding pipeline (5) are both made of PVC material.