Carbon dioxide dosing device

Abstract

This application relates to a carbon dioxide dosing device, including a water supply pipe and a chlorination pipe. The chlorination pipe is connected to any section of the water supply pipe for connecting to an external chlorinator to disinfect the water. The device also includes a carbon dioxide dosing mechanism, a control unit, and a monitoring unit. The carbon dioxide dosing mechanism has an injection pipe connected to the water supply pipe. The injection pipe is located after the chlorination pipe and is used to inject carbon dioxide gas into the disinfected water in the water supply pipe. Both the carbon dioxide dosing mechanism and the monitoring unit are electrically connected to the control unit. The monitoring unit monitors the pH value of the raw water in the water supply pipe before and after the injection pipe. The control unit controls the injection rate of the carbon dioxide dosing mechanism based on the monitoring data from the monitoring unit. This carbon dioxide dosing device adds a temporary carbon dioxide dosing system to the existing structures of the water plant. By adding carbon dioxide, it lowers the pH value of the raw water, thereby eliminating subsequent water quality risks, and is safe and reliable.

Description

Technical Field

[0001] This application relates to the field of water treatment equipment technology, and in particular to a carbon dioxide dosing device. Background Technology

[0002] During the spring and summer seasons when algae blooms are prevalent, the pH value of the raw water from the South-to-North Water Diversion Project increases, which in turn affects the precise control of chemical dosing at water treatment plants and leads to the risk of excessive aluminum levels in the treated water.

[0003] Currently, most water plants adjust the pH level of raw water by adding mineral acids or organic acids. However, whether it is mineral acid or organic acid, if it exists in drinking water for a long time, it will inevitably cause some harm to the human body.

[0004] To address the aforementioned issues, there is an urgent need in this field for a water treatment device that can reduce the pH value of raw water while eliminating subsequent water quality risks. Utility Model Content

[0005] To ensure the safety and reliability of drinking water pH adjustment, the effluent quality must meet national standards.

[0006] The carbon dioxide dosing device provided in this application adopts the following technical solution:

[0007] A carbon dioxide dosing device includes a water supply pipe and a chlorination pipe. The chlorination pipe is connected to any section of the water supply pipe for connecting to an external chlorinator to disinfect the water. The device is characterized by further including a carbon dioxide gas injection mechanism, a control unit, and a monitoring unit. The carbon dioxide gas injection mechanism has an injection pipe connected to the water supply pipe. The injection pipe is located after the chlorination pipe and is used to inject carbon dioxide gas into the disinfected water in the water supply pipe. Both the carbon dioxide gas injection mechanism and the monitoring unit are electrically connected to the control unit. The monitoring unit is used to monitor the pH value of the raw water in the water supply pipe before and after the injection pipe. The control unit controls the gas injection rate of the carbon dioxide gas injection mechanism based on the monitoring data from the monitoring unit.

[0008] Preferably, the carbon dioxide gas injection mechanism includes a cryogenic liquid CO2 storage tank, a vaporizer, and a gas nozzle. The cryogenic liquid CO2 storage tank contains food-grade liquid carbon dioxide. The cryogenic liquid CO2 storage tank is connected to the vaporizer, and the vaporizer is connected to the injection pipe. One end of the injection pipe extends into the water injection pipe and is connected to the gas nozzle.

[0009] Furthermore, an intelligent control valve is installed on the filling pipeline, and the intelligent control valve is electrically connected to the control unit.

[0010] Preferably, the monitoring unit includes two pH meters, one of which is installed on the water supply pipe at the front end of the chlorination pipe, and the other is installed on the water supply pipe at the rear end of the injection pipe. Both pH meters are electrically connected to the control unit.

[0011] Furthermore, the control unit includes, but is not limited to, a PLC controller or an MCU controller.

[0012] Compared with the prior art, the carbon dioxide dosing device of this utility model has the following beneficial technical effects:

[0013] 1. The carbon dioxide dosing device of this utility model utilizes the existing structures and pipelines of the water plant, and makes minor modifications to the original dosing points to achieve precise control of the pH value of the raw water. It uses carbon dioxide to adjust the pH value, avoids the use of mineral acids or organic acids, ensures the safety and reliability of pH adjustment for drinking water, and ensures that the quality of the effluent meets national standards.

[0014] 2. The carbon dioxide dosing device of this utility model uses a "gas / liquid" dosing method after chlorination before the raw water pipe. That is, an insertable gas nozzle is installed in the raw water pipe, and the pressure generated by the vaporization of liquid carbon dioxide is used to directly inject carbon dioxide gas into the pipe after pressure regulation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a carbon dioxide dosing device provided by this utility model;

[0016] Attached reference numerals: 1. Water supply pipe; 2. Chlorination pipe; 3. Carbon dioxide injection mechanism; 31. Injection pipeline; 32. Cryogenic liquid CO2 storage tank; 33. Vaporizer; 34. Gas nozzle; 4. Control unit; 5. Monitoring unit; 51. pH meter; 6. Intelligent control valve. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the described embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application pertains. The use of terms such as "a" or "an" in this patent application specification and claims does not indicate a limitation of quantity, but rather indicates the presence of at least one.

[0019] The following is in conjunction with the appendix Figure 1 This application provides further details.

[0020] This application discloses a carbon dioxide dosing device.

[0021] Reference Figure 1 A carbon dioxide dosing device includes a water supply pipe 1, a chlorination pipe 2, a carbon dioxide dosing mechanism 3, a control unit 4, and a monitoring unit 5.

[0022] One end of the water supply pipe 1 is connected to the existing structures and pipelines of the water plant to discharge raw water. The chlorination pipe 2 is connected to any section of the water supply pipe 1 to connect to an external chlorinator for disinfection of the water. The carbon dioxide injection mechanism 3 has an injection pipe 31 connected to the water supply pipe 1. The injection pipe 31 is inserted and installed after the chlorination pipe 2 to inject carbon dioxide gas into the disinfected water in the water supply pipe 1. By utilizing the property that carbon dioxide reacts with water to form carbonic acid when it is fused with water, the pH value of the water is adjusted. It is safe and harmless. The carbon dioxide injection mechanism 3 and the monitoring unit 5 are both electrically connected to the control unit 4. The monitoring unit 5 is used to monitor the pH value of the raw water in the water supply pipe 1 before and after the injection pipe 31. The control unit 4 controls the injection volume of the carbon dioxide injection mechanism 3 according to the monitoring data of the monitoring unit 5.

[0023] The carbon dioxide gas injection mechanism 3 includes a cryogenic liquid CO2 storage tank 32, a vaporizer 33, and a gas nozzle 34. The cryogenic liquid CO2 storage tank 32 is used to store food-grade liquid carbon dioxide. The cryogenic liquid CO2 storage tank 32 is connected to the vaporizer 33. The gas outlet of the vaporizer 33 is connected to the injection pipe 31. One end of the injection pipe 31 is inserted into the water injection pipe 1 and connected to the gas nozzle 34. The vaporizer 33 converts the liquid CO2 into gaseous carbon dioxide. At the same time, the pressure generated after the liquid carbon dioxide is vaporized is used to directly inject carbon dioxide gas into the water injection pipe 1 through the gas nozzle 34 after pressure regulation. This makes the carbon dioxide injection convenient and quick. Only minor modifications are needed to the original injection point of the water injection pipe 1. In this embodiment, the connection and installation of the cryogenic liquid CO2 storage tank 32, the vaporizer 33, and the gas nozzle 34 are all existing technologies and will not be described in detail.

[0024] Reference Figure 1In a further embodiment, an intelligent control valve 6 is also installed on the injection pipe 31 to control the gas injection volume of the injection pipe 31. The intelligent control valve 6 is electrically connected to the control unit 4. The monitoring unit 5 includes two pH meters 51. One pH meter 51 is installed on the water supply pipe 1 at the front end of the chlorination pipe 2 to monitor the pH value of the raw water in the water supply pipe 1 at the front end of the chlorination pipe 2. The other pH meter 51 is installed on the water supply pipe 1 at the rear end of the injection pipe 31 to monitor the pH value of the raw water in the water supply pipe 1 at the rear end of the injection pipe 31. Both pH meters 51 are electrically connected to the control unit 4. The control unit 4 can be a PLC controller or an MCU controller, and is preset with a control system that adjusts the gas flow of the intelligent control valve 6 in real time according to the pH value at both ends of the water supply pipe 1. In this embodiment, the electrical connection technology and control principle of the intelligent control valve 6, pH meter 51 and control unit 4 are all existing technologies and will not be described in detail.

[0025] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A carbon dioxide dosing device, comprising a water supply pipe (1) and a chlorination pipe (2), wherein the chlorination pipe (2) is connected to any section of the water supply pipe (1) for connecting to an external chlorinator to achieve water disinfection, characterized in that, It also includes a carbon dioxide gas injection mechanism (3), a control unit (4), and a monitoring unit (5). The carbon dioxide gas injection mechanism (3) has an injection pipe (31) connected to the water injection pipe (1). The injection pipe (31) is located after the chlorination pipe (2) and is used to inject carbon dioxide gas into the disinfected water in the water injection pipe (1). The carbon dioxide gas injection mechanism (3) and the monitoring unit (5) are both electrically connected to the control unit (4). The monitoring unit (5) is used to monitor the pH value of the raw water in the water injection pipe (1) before and after the injection pipe (31). The control unit (4) controls the gas injection volume of the carbon dioxide gas injection mechanism (3) according to the monitoring data of the monitoring unit (5).

2. The carbon dioxide dosing device according to claim 1, characterized in that: The carbon dioxide gas injection mechanism (3) includes a cryogenic liquid CO2 storage tank (32), a vaporizer (33), and a gas nozzle (34). The cryogenic liquid CO2 storage tank (32) contains food-grade liquid carbon dioxide. The cryogenic liquid CO2 storage tank (32) is connected to the vaporizer (33). The vaporizer (33) is connected to the injection pipe (31). One end of the injection pipe (31) extends into the water injection pipe (1) and is connected to the gas nozzle (34).

3. The carbon dioxide dosing device according to claim 2, characterized in that: The filling pipeline (31) is equipped with an intelligent control valve (6), which is electrically connected to the control unit (4).

4. The carbon dioxide dosing device according to claim 1, characterized in that: The monitoring unit (5) includes two pH meters (51). One pH meter (51) is installed on the water supply pipe (1) at the front end of the chlorination pipe (2), and the other pH meter (51) is installed on the water supply pipe (1) at the rear end of the injection pipe (31). Both pH meters (51) are electrically connected to the control unit (4).

5. A carbon dioxide dosing device according to claim 3 or 4, characterized in that: The control unit (4) includes, but is not limited to, a PLC controller or an MCU controller.

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