Circulating water chlorine feeding system

Abstract

The utility model belongs to the technical field of circulating water purification, and relates to a circulating water chlorine feeding system which comprises a liquid chlorine evaporation drying box, a chlorine feeding pump and a circulating water tank, the liquid chlorine evaporation drying box is externally connected with a liquid chlorine feeding pipe communicated with the interior of the liquid chlorine evaporation drying box; the circulating water tank is externally connected with a circulating water inlet pipe communicated with the circulating water tank; and the liquid chlorine evaporation drying box is communicated with a circulating water inlet pipe through a chlorine adding pump. Chlorine is obtained by drying liquid chlorine, and then the chlorine is added into the circulating water tank, so that the pH value in the circulating water system is stable, the operation cost is reduced, additional acid does not need to be added, the TDS content is reduced, the drainage work is reduced, and circulating water is saved.

Description

Technical Field

[0001] This utility model belongs to the field of circulating water purification technology and relates to a circulating water chlorine dosing system. Background Technology

[0002] In chemical production, circulating water is often used as a heating medium. However, because the circulating water is constantly circulating, prolonged use can lead to high levels of hypochlorite ions and conductivity in the heating pipes, affecting the water's usability. Therefore, to reduce the conductivity of the circulating water, fresh water needs to be added to replace it, resulting in frequent replacements and increased water consumption. Consequently, to reduce the frequency of replacements and decrease water consumption, it is necessary to find other ways to lower the conductivity of the circulating water.

[0003] Referring to Chinese patent document CN201620913775.2, a circulating water chlorination system is disclosed. The first input end of the dosing header is connected to the output pipe of a seawater booster pump, and the second input end of the dosing header is connected to the output pipe of the dosing pump. The output end of the dosing header is connected to each circulating water forebay. The system also includes a dosing solution tank storing sodium hypochlorite solution, which is connected to the input pipe of the dosing pump. Seawater enters the dosing header through the seawater booster pump, and the sodium hypochlorite solution in the dosing solution tank is pumped into the dosing header to mix and dilute with the seawater before being transferred to the circulating water forebay requiring chlorination.

[0004] Although existing circulating water chlorination systems can purify and sterilize circulating water, the following problems exist due to the use of sodium hypochlorite: Sodium hypochlorite ionizes, and the heating and concentration of the circulating water causes the pH of the system to continuously increase, becoming alkaline. Therefore, sulfuric acid needs to be added to adjust the pH, which not only increases the operating cost but also generates salts, leading to an increase in the total dissolved solids (TDS) content in the circulating water tank. Consequently, circulating water with high TDS content must be discharged from the tank and replaced, resulting in frequent replacements, increasing drainage work and causing significant waste of circulating water. Summary of the Invention

[0005] To address the technical problems of high operating costs, increased TDS content, and increased drainage work associated with existing circulating water chlorination systems, this invention provides a circulating water chlorine dosing system.

[0006] This invention dries liquid chlorine to obtain chlorine gas, which is then added to a circulating water tank. This stabilizes the pH in the circulating water system, reduces operating costs, eliminates the need for additional acid, lowers TDS levels, reduces drainage work, and saves circulating water.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A circulating water chlorine dosing system includes a liquid chlorine evaporation and drying box, a chlorine dosing pump, and a circulating water tank;

[0009] The liquid chlorine evaporation drying chamber is externally connected to a liquid chlorine feed pipe that communicates with the interior of the liquid chlorine evaporation drying chamber; the circulating water tank is externally connected to a circulating water inlet pipe that communicates with the circulating water tank; the liquid chlorine evaporation drying chamber is connected to the circulating water inlet pipe via a chlorine dosing pump.

[0010] Further specifying, the circulating water chlorine dosing system also includes a sealed chamber; the liquid chlorine evaporation drying box and the chlorine dosing pump are both placed inside the sealed chamber, while the liquid chlorine feed pipe, the circulating water inlet pipe and the circulating water pool are all placed outside the sealed chamber.

[0011] Furthermore, the circulating water chlorine dosing system also includes liquid chlorine feeding valves located outside the sealed room; the liquid chlorine feeding valves are located on the liquid chlorine inlet pipe.

[0012] Furthermore, the circulating water chlorine dosing system also includes a chlorine control valve located outside the sealed room, and the chlorine dosing pump is connected to the circulating water inlet pipe via the chlorine control valve.

[0013] Furthermore, the circulating water chlorine dosing system also includes a residual chlorine detector located outside the sealed room; the residual chlorine detector is connected to the circulating water tank; and the residual chlorine detector is also communicatively connected to the chlorine control valve and the liquid chlorine dosing valve.

[0014] Furthermore, the circulating water chlorine dosing system also includes a chlorine detector placed on a sealed chamber.

[0015] Furthermore, the circulating water chlorine dosing system also includes a chlorine absorption device placed in a sealed chamber; the chlorine absorption device is communicatively connected to a chlorine detector.

[0016] Furthermore, the circulating water chlorine dosing system also includes a wastewater tank located outside a sealed room, and the wastewater tank is connected to a chlorine absorption device.

[0017] Furthermore, the circulating water chlorine dosing system also includes a chlorine alarm device placed in a sealed chamber; the chlorine alarm device is communicatively connected to a chlorine detector.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. This invention obtains chlorine gas by drying liquid chlorine, and then adds the chlorine gas to a circulating water tank. The chlorine gas dissolves in water to produce a mixed solution of hydrochloric acid and hypochlorous acid. The hypochlorous acid in the mixed solution reduces the conductivity of the circulating water, while the presence of hydrochloric acid in the mixed solution stabilizes the pH of the circulating water system, thereby reducing operating costs. Furthermore, no additional acid needs to be added, which can greatly reduce the TDS content in the circulating water system, thereby reducing drainage work and saving circulating water.

[0020] 2. This utility model uses a residual chlorine detector to detect the chlorine content in the circulating water tank, ensuring that the residual chlorine content in the circulating water tank meets the requirements for circulating water.

[0021] 3. This utility model incorporates a chlorine detector to monitor the chlorine content in a sealed room, preventing chlorine leakage during the chlorine addition process and ensuring personnel safety. Furthermore, it includes a chlorine alarm that can promptly issue an alarm signal in case of chlorine leakage, making it convenient to use.

[0022] 4. By setting up a chlorine absorption device, this utility model can be activated to absorb the leaked chlorine when a chlorine leak occurs in the sealed chamber, thereby improving safety.

[0023] 5. This utility model uses a controller to realize the interlocking control of the residual chlorine detector, chlorine detector and various valves, so as to realize automatic chlorine dosing and make operation simpler. Attached Figure Description

[0024] Figure 1 A schematic diagram of the circulating water chlorine dosing system provided by this utility model;

[0025] Figure 2 A schematic diagram of another circulating water chlorine dosing system provided by this utility model;

[0026] in:

[0027] 100-Liquid chlorine evaporation and drying chamber; 110-Liquid chlorine feed pipe; 120-Liquid chlorine feeding valve; 200-Chlorine dosing pump; 210-Chlorine control valve; 300-Sealed chamber; 400-Circulating water tank; 410-Circulating water inlet pipe; 500-Chlorine absorption device; 600-Wastewater tank; 700-Chlorine alarm; 800-Residual chlorine detector. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0029] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0030] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0031] Example 1

[0032] See Figure 1 This embodiment provides a circulating water chlorine dosing system, including a liquid chlorine evaporation drying box 100, a chlorine dosing pump 200, and a circulating water tank 400; the liquid chlorine evaporation drying box 100 is externally connected to a liquid chlorine feed pipe 110 that communicates with the inside of the liquid chlorine evaporation drying box 100; the circulating water tank 400 is externally connected to a circulating water inlet pipe 410 that communicates with the circulating water tank 400; the liquid chlorine evaporation drying box 100 is connected to the circulating water inlet pipe 410 via the chlorine dosing pump 200.

[0033] In this embodiment, the circulating water chlorine dosing system also includes a sealed chamber 300; the liquid chlorine evaporation drying box 100 and the chlorine dosing pump 200 are all placed inside the sealed chamber 300, and the liquid chlorine feed pipe 110, the circulating water inlet pipe 410 and the circulating water pool 400 are all placed outside the sealed chamber 300.

[0034] In this embodiment, the circulating water chlorine dosing system also includes a liquid chlorine feeding valve 120 located outside the sealed chamber 300; the liquid chlorine feeding valve 120 is located on the liquid chlorine feed pipe 110 and is used to control the start and stop of liquid chlorine feeding.

[0035] In this embodiment, the circulating water chlorine dosing system also includes a chlorine control valve 210 located outside the sealed chamber 300, and the chlorine dosing pump 200 is connected to the circulating water inlet pipe 410 via the chlorine control valve 210.

[0036] The working process of the circulating water chlorine dosing system provided in this embodiment is as follows:

[0037] Open the liquid chlorine feed valve 120 and the chlorine control valve 210; liquid chlorine enters the liquid chlorine evaporation and drying tank 100 through the liquid chlorine feed pipe 110, and after evaporation and drying, the water in the liquid chlorine is removed to form dry chlorine gas, avoiding corrosion of the pipeline by liquid chlorine; then the chlorine gas flows into the circulating water inlet pipe 410 through the chlorine gas dosing pump 200 and the chlorine control valve 210, where the chlorine gas and the circulating water in the circulating water inlet pipe 410 mix to form a mixed solution of hydrochloric acid and hypochlorous acid, and then the mixed solution and the circulating water are mixed together and enter the circulating water tank 400; the hypochlorous acid in the mixed solution reduces the conductivity of the circulating water, and the presence of hydrochloric acid in the mixed solution stabilizes the pH of the circulating water system, thereby reducing operating costs; because the mixed solution contains hydrochloric acid, the process of using sulfuric acid to lower the pH and generate salt is effectively avoided, thus greatly reducing the TDS content in the circulating water system, thereby reducing drainage work and saving circulating water.

[0038] Example 2

[0039] See Figure 2 Based on Example 1, the circulating water chlorine dosing system provided in this example also includes a residual chlorine detector 800 located outside the sealed chamber 300; the residual chlorine detector 800 is connected to the circulating water tank 400. The residual chlorine detector 800 is also communicatively connected to the chlorine control valve 210 and the liquid chlorine dosing valve 120.

[0040] During implementation, the residual chlorine detector 800 is connected to the circulating water tank 400 to detect the chlorine content in the circulating water tank 400. Then, based on the chlorine content, the valve opening of the chlorine control valve 210 and the liquid chlorine feed valve 120 is controlled to control the amount of chlorine added.

[0041] Preferably, the chlorine content in the circulating water tank 400 is generally between 0.1 mg / L and 1 mg / L; when the chlorine content in the circulating water tank 400 is less than 0.1 mg / L, the valves of the chlorine control valve 210 and the liquid chlorine feed valve 120 are opened wider; when the chlorine content in the circulating water tank 400 is greater than 1 mg / L, the valves of the chlorine control valve 210 and the liquid chlorine feed valve 120 are opened narrower or temporarily closed.

[0042] In this embodiment, the circulating water chlorine dosing system also includes a chlorine detector placed on the sealed chamber 300; the chlorine detector is used to detect the chlorine content in the sealed chamber 300. This is because the liquid chlorine evaporation drying box 100, the chlorine dosing pump 200, and the circulating water tank 400 are all connected by pipes to prevent chlorine leakage from the pipes. The chlorine detector can conveniently detect the chlorine content in the sealed chamber 300, improving safety.

[0043] Preferably, when the chlorine detector detects that the chlorine content in the sealed chamber 300 is greater than 1 mg / L, it indicates a chlorine leak and threatens the safety of the operators.

[0044] In this embodiment, the circulating water chlorine dosing system also includes a chlorine absorption device 500 placed in a sealed chamber 300; the chlorine absorption device 500 is communicatively connected to a chlorine detector.

[0045] The function of the chlorine absorption device 500 is to absorb leaked chlorine. When the chlorine detector detects that the chlorine content in the sealed chamber 300 is greater than 1 mg / L, the chlorine absorption device 500 starts to work and absorbs the chlorine in the sealed chamber 300.

[0046] The chlorine absorption device 500 is a conventional commercially available product. It is mainly a safety emergency device for chlorine gas leaks. It can absorb and treat leaked chlorine gas, and the chlorine gas is ultimately absorbed by the absorbent liquid contained in the chlorine absorption device 500.

[0047] In this embodiment, the circulating water chlorine dosing system also includes a wastewater tank 600 located outside the sealed chamber 300, which is connected to the chlorine absorption device 500. The absorbent in the chlorine absorption device 500 continuously absorbs chlorine, and then periodically discharges the absorbent into the wastewater tank 600 for treatment.

[0048] In this embodiment, the circulating water chlorine dosing system also includes a chlorine alarm 700 placed on the sealed chamber 300; the chlorine alarm 700 is communicatively connected to the chlorine detector.

[0049] When the chlorine detector detects that the chlorine content in the sealed chamber 300 is greater than 1 mg / L, the chlorine alarm 700 will sound an alarm to promptly warn the operator.

[0050] Preferably, there are two chlorine gas alarms 700, each installed on the top of the sealed chamber 300.

[0051] The working process of the circulating water chlorine dosing system provided in this embodiment is as follows:

[0052] The residual chlorine detector 800 detects the chlorine content in the circulating water tank 400 to ensure that the chlorine content in the circulating water system meets the requirements (chlorine content between 0.1 mg / L and 1 mg / L). The chlorine gas detector detects whether there is a chlorine leak in the sealed chamber 300. When a chlorine leak occurs, the chlorine gas alarm 700 is activated, and the chlorine gas absorption device 500 is also activated. The chlorine gas absorption device 500 absorbs the chlorine leaked in the sealed chamber 300 to ensure safety.

[0053] Preferably, to achieve interlocking between the residual chlorine detector 800, the chlorine detector, and the corresponding valves, a controller is installed. This controller is connected to the residual chlorine detector 800, the chlorine detector, the chlorine absorption device 500, the chlorine control valve 210, the chlorine alarm 700, the liquid chlorine feed valve 120, and the chlorine dosing pump 200. The controller controls the feed rate of liquid chlorine and the dosage of chlorine. Furthermore, based on the detection results of the residual chlorine detector 800, when the chlorine content in the circulating water does not meet the requirements, the controller adjusts the valve opening of the chlorine control valve 210 and the liquid chlorine feed valve 120 to control the chlorine dosage. Additionally, based on the detection results of the chlorine detector, when chlorine leaks in the sealed chamber, the controller activates the chlorine absorption device 500 and the chlorine alarm 700, simultaneously absorbing the leaked chlorine and triggering an alarm, thus achieving automatic control.

[0054] This invention uses chlorine gas to be added. Chlorine dissolves in water to produce hydrochloric acid and hypochlorous acid solutions. While sterilizing the circulating water, it maintains the pH stability of the circulating water system and avoids pH increase, thereby reducing operating costs and reducing the amount of circulating water discharged. The circulating water system is replaced every four days. At the same time, this invention can also realize the automated addition and control of chlorine gas, ensuring the safety of personnel.

[0055] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A circulating water chlorine dosing system, characterized by, The circulating water chlorine gas adding system comprises a liquid chlorine evaporation drying box (100), a chlorine gas adding pump (200) and a circulating water pool (400). The liquid chlorine evaporation drying box (100) is externally connected with a liquid chlorine feeding pipe (110) in communication with the inside of the liquid chlorine evaporation drying box (100); the circulating water pool (400) is externally connected with a circulating water feeding pipe (410) in communication with the circulating water pool (400); and the liquid chlorine evaporation drying box (100) is in communication with the circulating water feeding pipe (410) through the chlorine gas adding pump (200).

2. The circulating water chlorine dosing system according to claim 1, characterized by The circulating water chlorine gas adding system further comprises a sealed chamber (300); the liquid chlorine evaporation drying box (100) and the chlorine gas adding pump (200) are arranged in the sealed chamber (300); and the liquid chlorine feeding pipe (110), the circulating water feeding pipe (410) and the circulating water pool (400) are arranged outside the sealed chamber (300).

3. The recirculating water chlorine dosing system of claim 2, wherein, The circulating water chlorine gas adding system further comprises a liquid chlorine feeding valve (120) arranged outside the sealed chamber (300); and the liquid chlorine feeding valve (120) is arranged on the liquid chlorine feeding pipe (110).

4. The recirculating water chlorine dosing system of claim 3, wherein, The circulating water chlorine gas adding system further comprises a chlorine gas control valve (210) arranged outside the sealed chamber (300); and the chlorine gas adding pump (200) is in communication with the circulating water feeding pipe (410) through the chlorine gas control valve (210).

5. The recirculating water chlorine dosing system of claim 4, wherein, The circulating water chlorine gas adding system further comprises a residual chlorine detector (800) arranged outside the sealed chamber (300); the residual chlorine detector (800) is connected with the circulating water pool (400); and the residual chlorine detector (800) is in communication connection with the chlorine gas control valve (210) and the liquid chlorine feeding valve (120).

6. The circulating water chlorine dosing system according to any one of claims 1 to 5, characterized in that, The circulating water chlorine gas adding system further comprises a chlorine gas detector arranged on the sealed chamber (300).

7. The recirculating water chlorine dosing system of claim 6, wherein, The circulating water chlorine gas adding system further comprises a chlorine gas absorption device (500) arranged in the sealed chamber (300); and the chlorine gas absorption device (500) is in communication connection with the chlorine gas detector.

8. The recirculating water chlorine dosing system of claim 7, wherein, The circulating water chlorine gas adding system further comprises a waste water pool (600) arranged outside the sealed chamber (300); and the waste water pool (600) is connected with the chlorine gas absorption device (500).

9. The recirculating water chlorine dosing system of claim 6, wherein, The circulating water chlorine gas adding system further comprises a chlorine gas alarm (700) arranged in the sealed chamber (300); and the chlorine gas alarm (700) is in communication connection with the chlorine gas detector.

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