Cooling tower circulating water PH value automatic detection control device

Abstract

The utility model discloses a cooling tower circulating water PH value automatic detection control device which comprises a detection device PH value detector used for monitoring the PH value of circulating water in real time; the adjusting device comprises a first chemical storage tank, a second chemical storage tank, an electric control three-way valve and a precise electronic metering pump, and is used for providing acidic substances or alkaline substances for adjusting the pH value of the circulating water; the control device is a PLC electric control box and controls the adjusting device to add needed chemicals to the circulating water system, the dosage of the added chemicals is controlled by controlling the precise electronic metering pump so as to achieve the purpose of controlling the PH value of the circulating water, and the filtering devices are arranged on the water inlet and water return port pipelines of the cooling water tower so as to further control the purity of the circulating water. Impurities are reduced, and the filter element can be replaced regularly. According to the equipment, scale is reduced, meanwhile, corrosion to cooling system terminal equipment due to the fact that the PH value exceeds the standard is avoided, and the service life of the equipment is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling towers, in particular to an automatic detection and control device for pH value of circulating water in a cooling tower. Background Art

[0002] A cooling tower is a cooling device that looks like a barrel. From a distance, it is very similar to a tower. Its working principle combines aerodynamics, chemistry, biology, materials science, mechanics, fluid mechanics and many other structural mechanics. It is a relatively complex device and is widely used in various air conditioning cooling systems, industrial production workshops, and injection molding industries. There are many parameters about water in cooling tower products, such as evaporation, water supply, and circulating water. The main medium of the cooling tower is water, and the quality of water will affect the operation of the cooling tower. With the continuous improvement of modern production requirements, the requirements for cooling towers have been improved to a certain extent.

[0003] During the operation of the cooling tower, scale will form around the relevant pipes. The scale in the cooling tower will cause the cooling tower to overheat, slow cooling, etc. When the scale reaches a certain concentration, it may also cause the exchange volume of the cooling tower to decrease. The formation of these scales is a relatively complicated process. There are a lot of impurities in the water. Under high temperature conditions, a certain oxidation will occur. When these oxidized substances pass through the cooling tower, they will leave various dirt after the temperature changes. In the daily use of the cooling tower, it is necessary to clean these scales, and the quality of water is directly related to the amount of dirt. The water used in the cooling tower needs to be as low in impurities and high in purity as possible, and the optimal pH value of the water quality needs to be controlled between 6.5 and 7.5. Summary of the invention

[0004] The utility model aims to provide a cooling tower circulating water pH value automatic detection control device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an automatic detection and control device for the pH value of circulating water in a cooling tower, an automatic detection and control device for the pH value of circulating water in a cooling tower, comprising a cooling water tower, an air compressor head and an oil cooler connected to the cooling water tower, the return water pipe of the cooling water tower is connected to a cooling water tank, a first chemical storage tank and a second chemical storage tank are arranged next to the cooling water tower, an electric-controlled three-way valve is arranged between the two storage tanks, one end of the electric-controlled three-way valve is connected to an electric control box, and the other end is connected to a precise electronic metering pump; one end of the precise electronic metering pump is connected to the electric control box, and the other end is connected to the cooling water tower, the return water port of the cooling water tower is connected to a pH value detector, and the water inlet and return water port pipes of the cooling water tower are respectively provided with filtering devices.

[0006] Preferably, the filtering device includes a cover body, a mounting tube fixed to the cover body by bolts, a second sealing ring is arranged between the cover body and the mounting tube, a limit block is arranged on the inner wall of the mounting tube, a filter element is placed between the limit blocks, and a first sealing ring is arranged on the outer circumference of the top of the filter element.

[0007] Preferably, the filter element can be replaced and cleaned regularly.

[0008] Preferably, the electric control box is a PLC controller.

[0009] Preferably, the electric control box controls the electric-controlled three-way valve and the precise electronic metering pump respectively, and receives data fed back by the pH value detector.

[0010] Preferably, the electric control box is electrically connected to the pH value detector.

[0011] Preferably, the electrically controlled three-way valve is made of corrosion-resistant material.

[0012] Preferably, the first chemical storage tank stores acidic substances, and the second chemical storage tank stores alkaline substances.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model describes an automatic detection and control device for the pH value of circulating water in a cooling tower, which controls the type of dosing selected through an electrically controlled three-way valve, and a pH value detector installed at the return water outlet of the cooling tower monitors the pH value of the circulating water in real time, transmits the data to the electric control box, automatically controls the precise electronic metering pump, and further controls the amount of acidic and alkaline chemicals added, and further controls the purity of the circulating water by arranging a filtering device at the water inlet and return water outlet pipes of the cooling water tower. The device reduces costs, controls the pH value of the circulating water, protects the system from corrosion, and extends the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is an enlarged structural diagram of part A of the utility model;

[0016] Figure 3 This is a structural diagram of the filter device of the utility model.

[0017] In the figure: 1. first chemical storage tank; 2. electric three-way valve; 3. second chemical storage tank; 4. precise electronic metering pump; 5. electric control box; 6. cooling water tower; 7. pH value detector; 8. cooling water tank; 9. air compressor head; 10. oil cooler; 11. filtering device; 1101. cover; 1102. mounting pipe; 1103. filter element; 1104. first sealing ring; 1105. second sealing ring; 1106. limit block. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-3 The utility model provides a technical solution: a cooling tower circulating water pH value automatic detection control device, comprising a first chemical storage tank 1 and a second chemical storage tank 3, an electrically controlled three-way valve 2 connected thereto, the third valve of the electrically controlled three-way valve 2 being connected to a precise electronic metering pump 4, the electrically controlled three-way valve 2 and the precise electronic metering pump 4 being commonly connected to an electrical control box 5, the electrical control box 5 being further connected to a pH value detector 7, the other end of the precise electronic metering pump 4 being connected to a cooling water tower 6, the water inlet and return water pipes of the cooling water tower 6 being provided with a filtering device 11, the return water at the bottom of the cooling water tower 6 being connected to a pH value detector 7, the pH value detector 7 being connected to an air compressor head 9 and an oil cooler 10 connected to the air compressor head 9, the ends of the air compressor head 9 and the oil cooler 10 being connected to a cooling water tank 8.

[0020] As an embodiment of the present utility model, the filter device 11 includes a cover body 1101, the cover body 1101 and the mounting tube 1102 are connected by bolts, a second sealing ring 1105 is provided between the cover body 1101 and the mounting tube 1102, a plurality of limit blocks 1106 are provided on the inner wall of the mounting tube 1102, a filter element 1103 is placed in the limit blocks 1106, a first sealing ring 1104 is provided on the outer circumference of the top of the filter element 1103, and the first sealing ring 1104 and the top edge of the mounting tube 1102 are sealed in a close fit; the replacement method of the filter device is as follows: unscrew the fixing bolts to open the cover body, take out the filter element from the mounting tube, and clean or replace it, put the cleaned and replaced new filter element back into the mounting tube, cover the cover body and fix it with fixing bolts to complete the replacement.

[0021] As an implementation mode of the present utility model, two valves of the electric-controlled three-way valve 2 are respectively connected to the first chemical storage tank 1 and the second chemical storage tank 3, and the opening and closing states of the valves are controlled by the electric control box 5.

[0022] As an implementation mode of the present invention, the precise electronic metering pump 4 controls the amount of added chemicals to achieve the regulation of the pH value of the circulating water.

[0023] As an implementation mode of the present utility model, the precise electronic metering pump 4 is made of corrosion-resistant material.

[0024] As an implementation mode of the present utility model, the electric control box 5 is a PLC controller.

[0025] As an implementation mode of the present utility model, the pH value detector 7 performs real-time online detection and feeds back the pH value of the circulating water to the electric control box 5 at any time.

[0026] As an implementation mode of the present utility model, the air compressor head 9 and the oil cooler 10 are installed together to provide power for the device.

[0027] The working principle of the utility model is as follows: the pH value of circulating water is monitored by a pH value detector, and data is fed back to an electric control box; when the pH value is below 6.5, the electric control three-way valve and the valve of the second chemical storage tank are opened to provide alkaline substances, and the amount of added chemicals is controlled by a precise electronic metering pump; when the pH value is above 7.5, the electric control three-way valve and the valve of the first chemical storage tank are opened to provide acidic substances, and the amount of added chemicals is controlled by a precise electronic metering pump; when the pH value is between 6.5 and 7.5, both valves are closed and no chemicals are added; power is provided by an air compressor head, and the oil cooler cools the air compressor head.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cooling tower circulating water pH value automatic detection and control device, comprising a cooling water tower (6), an air compressor head (9) and an oil cooler (10) connected to the cooling water tower (6), wherein the return pipe of the cooling water tower (6) is connected to a cooling water tank (8), characterized in that: A first chemical storage tank (1) and a second chemical storage tank (3) are arranged next to the cooling water tower (6); an electrically controlled three-way valve (2) is arranged between the two storage tanks; one end of the electrically controlled three-way valve (2) is connected to an electric control box (5), and the other end is connected to a precise electronic metering pump (4); one end of the precise electronic metering pump (4) is connected to the electric control box (5), and the other end is connected to the cooling water tower (6); a pH value detector (7) is connected to a water return port of the cooling water tower (6); and a filter device (11) is provided at the water inlet and water return port pipelines of the cooling water tower (6), respectively.

2. The cooling tower circulating water pH value automatic detection and control device according to claim 1 is characterized in that: The filtering device (11) comprises a cover body (1101), a mounting tube (1102) fixed to the cover body (1101) by bolts, a second sealing ring (1105) is provided between the cover body (1101) and the mounting tube (1102), a limiting block (1106) is provided on the inner wall of the mounting tube (1102), a filter element (1103) is placed between the limiting blocks (1106), and a first sealing ring (1104) is provided on the outer circumference of the top of the filter element (1103).

3. The cooling tower circulating water pH value automatic detection and control device according to claim 2 is characterized in that: The filter element (1103) can be replaced and cleaned regularly.

4. The cooling tower circulating water pH value automatic detection and control device according to claim 1, characterized in that: The electric control box (5) is a PLC controller.

5. The cooling tower circulating water pH value automatic detection and control device according to claim 4 is characterized in that: The electric control box (5) controls the electric-controlled three-way valve (2) and the precise electronic metering pump (4) respectively, and receives data fed back by the pH value detector (7).

6. The cooling tower circulating water pH value automatic detection and control device according to claim 5, characterized in that: The electric control box (5) is electrically connected to the pH value detector (7).

7. The cooling tower circulating water pH value automatic detection and control device according to claim 5, characterized in that: The electrically controlled three-way valve (2) is made of corrosion-resistant material.

8. The cooling tower circulating water pH value automatic detection and control device according to claim 1, characterized in that: The first chemical storage tank (1) stores acidic substances, and the second chemical storage tank (3) stores alkaline substances.

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