Carbon dioxide adding system for feed water treatment

Abstract

The utility model belongs to the field of drinking water treatment systems, and provides a carbon dioxide adding system for water supply treatment, which comprises a water inlet pipe, a dissolving cavity, a water outlet pipe and a carbon dioxide supply system, a weir plate is arranged in the dissolving cavity, the inside of the dissolving cavity is divided into a dissolving area and a water outlet area by the weir plate, and a microporous aerator is arranged in the dissolving area; the water inlet pipe is communicated with the dissolving area; the water outlet pipe communicates with the water outlet area; and the carbon dioxide supply system is used for providing carbon dioxide for the microporous aerator. According to the carbon dioxide adding system, the microporous aerator is arranged in the dissolving cavity, so that carbon dioxide gas can be accurately and uniformly filled into water in a micron-sized bubble form, and the aeration uniformity is remarkably improved. The weir plate is arranged in the dissolving cavity, so that redundant bubbles can be effectively collected before being discharged, and the bubbles are prevented from entering a subsequent water outlet pipeline to influence the accuracy of an online instrument and avoid pipeline vibration. The complete dissolution of carbon dioxide gas into water in single equipment is realized.

Description

Technical Field

[0001] This utility model belongs to the field of drinking water treatment systems, specifically relating to a carbon dioxide dosing system for water treatment. Background Technology

[0002] With the rapid development of the times and the continuous improvement of people's demands for a better life, the issue of drinking water health and safety has been elevated to a new level. The requirements for drinking water quality are no longer simply satisfied with national standards, but are gradually being aligned with those of developed countries. First-tier cities both domestically and internationally regard high-quality water supply as a symbol of urban development and residents' quality of life. my country has a vast territory, with significant differences in water source quality and quantity across regions. Furthermore, the problem of unbalanced and insufficient economic development remains prominent, leading to varying requirements for drinking water quality and quantity. For example, economically developed cities such as Shenzhen and Shanghai have taken the lead in implementing direct drinking water projects and have promulgated corresponding local drinking water standards. All of these developments pose new requirements for the upgrading and transformation of water supply plants to meet high-quality water supply standards.

[0003] For the lower reaches of the Yangtze River, the Yangtze River is the primary water source. Due to the dense river network and numerous lakes, various water supply models have emerged, including supply from the Yangtze River, supply from single or multiple lakes, and a dual-source supply system combining the Yangtze River and lakes. However, lake and reservoir waters often suffer from low self-purification capacity, frequently experiencing eutrophication, high algae pollution in summer, large fluctuations in water volume, and unpleasant odors, posing significant challenges to the operation and control of water treatment plants. In recent years, the issue of "micro-aluminum" has become prominent in the lower reaches of the Yangtze River. For example, the raw water in Shanghai is alkaline, and the pH value of water sources such as the Huangpu River is generally around 8. The pH value of raw water has a significant impact on the form in which aluminum exists in the water; at higher pH values, aluminum typically exists as dissolved AlO₂. 2- Exists; at low pH values, it exists in dissolved Al. 3+ Yes, it exists. Generally, when the pH of the influent is higher than 7.5, a larger amount of dissolved Al(OH) will be generated. 4- This reduces the coagulation effect, leading to an increase in residual aluminum in the effluent, which poses a risk of exceeding the standard. In order to ensure the quality of the effluent, water plants have traditionally used methods such as adding hydrochloric acid or sulfuric acid, but these methods have prominent problems such as high cost, significant safety hazards, and large pH fluctuations.

[0004] With the advent of the green development concept, carbon dioxide dosing has become a hot application and has been widely used. Generally, adding around 10 mg / L of carbon dioxide controls the pH value at around 7.3, ensuring that the residual aluminum in the effluent is consistently below 0.05 mg / L. This can achieve a reduction of approximately 13% in reagent costs while also reducing sludge production. Therefore, carbon dioxide pretreatment has the advantages of being green, economical, and efficient, and has significant application prospects.

[0005] However, existing carbon dioxide dosing devices have the following drawbacks:

[0006] 1. The carbon dioxide dosing efficiency is low and the accuracy is poor, which can easily lead to excessive dosage and low utilization rate. In addition, a long reaction pipeline is required to increase the carbon dioxide dissolution rate, which requires a large area and high operating cost.

[0007] 2. Excessive undissolved carbon dioxide gas in subsequent pipelines can easily escape and remain in the pipeline, interfering with the accuracy of subsequent online instruments. Moreover, when the flow rate is high, it can easily cause pipeline vibration and even damage to the pipeline.

[0008] 3. Traditional carbon dioxide dosing methods mostly rely on manual control, which has a delayed response and cannot be adjusted in real time according to the influent water quality, resulting in insufficient or excessive dosage. Utility Model Content

[0009] To address the shortcomings of existing technologies, this invention provides a carbon dioxide dosing system for water treatment, which can solve the aforementioned problems.

[0010] To achieve the above objectives, the present invention adopts the following technical solution: a carbon dioxide dosing system for water treatment, comprising an inlet pipe, a dissolving chamber, an outlet pipe, and a carbon dioxide supply system;

[0011] The dissolving chamber is equipped with a weir plate, which divides the interior of the dissolving chamber into a dissolving zone and an effluent zone. A microporous aerator is provided in the dissolving zone.

[0012] The water inlet pipe is connected to the dissolving zone;

[0013] The water outlet pipe is connected to the water outlet area;

[0014] The carbon dioxide supply system is used to supply carbon dioxide to the microporous aerator.

[0015] Preferably, a guide plate is provided in the dissolution zone.

[0016] Preferably, the dissolving cavity gradually narrows from bottom to top.

[0017] Preferably, the top of the dissolving chamber is connected to an exhaust pipe, and the exhaust pipe is equipped with a pressure relief valve.

[0018] Preferably, the exhaust pipe is equipped with a first pressure gauge.

[0019] Preferably, the system also includes an online pH meter, wherein a probe is provided in both the inlet pipe and the outlet pipe, and the probe is electrically connected to the online pH meter.

[0020] Preferably, the carbon dioxide supply system is connected to the microporous aerator via an aeration pipe, and the aeration pipe is equipped with an electric regulating valve.

[0021] Preferably, a control module is also included, and the online pH meter and the electric regulating valve are both electrically connected to the control module.

[0022] Preferably, the carbon dioxide supply system includes a liquid carbon dioxide storage tank and a carbon dioxide vaporizer, with the outlet of the liquid carbon dioxide storage tank connected to the inlet of the carbon dioxide vaporizer, and the outlet of the carbon dioxide vaporizer connected to the microporous aerator through the aeration pipe.

[0023] Preferably, the aeration pipe is equipped with a gas flow meter and a second pressure gauge.

[0024] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0025] 1. This utility model provides a carbon dioxide dosing system for water treatment. By installing a microporous aerator within the dissolution chamber, carbon dioxide gas can be precisely and uniformly injected into the water in the form of micron-sized bubbles, significantly improving aeration uniformity. A weir plate within the dissolution chamber effectively collects excess bubbles before discharge, preventing them from entering subsequent effluent pipes and affecting the accuracy of online instruments, and avoiding pipe vibration. This system achieves complete dissolution of carbon dioxide gas into water within a single device, significantly shortening the pipe length required for the dissolution process and improving carbon dioxide utilization. It also improves coagulation efficiency, reduces PAC dosage, and effectively lowers dosing costs.

[0026] 2. The carbon dioxide dosing system for water treatment provided by this utility model has a guide plate in the dissolution zone to further refine the bubbles and prolong the gas-liquid contact time, effectively enhancing the dissolution efficiency of carbon dioxide; it can achieve an effective utilization rate of carbon dioxide of over 95%.

[0027] 3. The present invention provides a carbon dioxide dosing system for water treatment, wherein the top of the dissolving chamber is equipped with an exhaust pipe, a pressure gauge and a pressure relief valve, which can detect the pressure change inside the dissolving chamber. When the pressure value rises above the safe pressure value, the pressure relief valve automatically opens to release pressure, thereby improving operational safety.

[0028] 4. The carbon dioxide dosing system for water treatment provided by this utility model has a dissolution chamber that gradually narrows from bottom to top, forming a spatial structure that is smaller at the top and larger at the bottom. This helps to compress and dissolve carbon dioxide gas, reduces gas accumulation in the upper space, and improves solubility.

[0029] 5. The carbon dioxide dosing system for water treatment provided by this utility model not only improves storage capacity by adopting a liquid carbon dioxide storage method, but also optimizes space utilization and reduces the floor space occupied.

[0030] 6. The carbon dioxide dosing system for water treatment provided by this utility model can monitor the pH value of the influent and effluent in real time through an online pH meter, and automatically adjust the amount of carbon dioxide added accordingly, so as to ensure the accuracy and efficiency of water quality control. Attached Figure Description

[0031] Figure 1 One of the connection structure diagrams of a carbon dioxide dosing system for water treatment provided in this embodiment of the present utility model;

[0032] Figure 2 A second schematic diagram of the connection structure of a carbon dioxide dosing system for water treatment provided in an embodiment of this utility model;

[0033] Figure 3 This is a three-dimensional structural diagram of a guide plate and related parts of a carbon dioxide dosing system for water treatment provided in an embodiment of the present utility model.

[0034] The attached diagram lists the components represented by each number as follows:

[0035] 1. Water inlet pipe;

[0036] 2. Water inlet valve;

[0037] 3. Inlet water flow meter;

[0038] 4. First probe;

[0039] 5. Dissolve the cavity;

[0040] 6. Dissolution zone;

[0041] 7. Weir plate;

[0042] 8. Water outlet area;

[0043] 9. Water outlet pipe;

[0044] 10. Water outlet valve;

[0045] 11. Exhaust pipe;

[0046] 12. Pressure relief valve;

[0047] 13. Microporous aerator;

[0048] 14. Aeration pipe;

[0049] 15. Electric regulating valve;

[0050] 16. Gas flow meter;

[0051] 17. Carbon dioxide vaporizer;

[0052] 18. Carbon dioxide delivery pipe;

[0053] 19. Conveying valves;

[0054] 20. First pressure gauge;

[0055] 21. Online pH meter;

[0056] 22. Liquid carbon dioxide storage tank;

[0057] 23. Deflector plate;

[0058] 24. Second pressure gauge;

[0059] 25. Second probe. Detailed Implementation

[0060] To make the technical solutions and advantages of the embodiments of this application clearer, the exemplary embodiments of this application will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not an exhaustive list of all embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0061] This embodiment provides a carbon dioxide dosing system for water treatment, including an inlet pipe 1, a dissolving chamber 5, an outlet pipe 9, and a carbon dioxide supply system.

[0062] The dissolving chamber 5 is equipped with a weir plate 7, which divides the interior of the dissolving chamber 5 into a dissolving zone 6 and an outlet zone 8. The dissolving zone 6 is equipped with a microporous aerator 13, and the inlet pipe 1 is connected to the dissolving zone 6; the outlet pipe 9 is connected to the outlet zone 8.

[0063] For example, see Figure 1 The dissolving chamber 5 is mounted on the ground via a support frame. The interior of the dissolving chamber 5 is used for temporary storage of water to be treated. A vertically installed weir 7 divides the interior of the dissolving chamber 5 into two areas: the left area is the dissolving zone 6, and the right area is the effluent zone 8. The top of the weir 7 is spaced a certain distance from the top of the dissolving chamber 5, allowing water in the dissolving zone 6 to rise and flow over the weir 7 into the effluent zone 8. An inlet pipe 1 connects to the bottom of the left side wall of the dissolving chamber 5 and is equipped with an inlet valve 2 and an inlet flow meter 3. An outlet pipe 9 connects to the bottom of the right side wall of the dissolving chamber 5 and is equipped with an outlet valve 10. The water to be treated can enter the dissolving zone 6 through the inlet pipe 1, then rise and flow over the weir 7 into the effluent zone 8, and finally be discharged through the outlet pipe 9.

[0064] A microporous aerator 13 is installed at the bottom of the dissolution zone 6. A carbon dioxide supply system is used to supply carbon dioxide to the microporous aerator 13.

[0065] Based on the above structure, the carbon dioxide dosing system provided in this embodiment, by setting a microporous aerator 13 in the dissolution chamber 5, can accurately and uniformly inject carbon dioxide gas into the water in the form of micron-sized bubbles, significantly improving aeration uniformity. The weir plate 7 installed in the dissolution chamber 5 can effectively collect excess bubbles before discharge, preventing bubbles from entering the subsequent effluent pipe and affecting the accuracy of online instruments, and avoiding pipe vibration. This achieves complete dissolution of carbon dioxide gas into the water within a single device, significantly shortening the pipe length required for the dissolution process and improving the utilization rate of carbon dioxide. It also improves coagulation effect, reduces PAC dosage, and effectively lowers dosing costs.

[0066] Based on the above technical solution, in the technical solution provided in this embodiment, a guide plate 23 is provided in the dissolution zone 6.

[0067] For example, see Figure 2 The dissolution zone 6 is equipped with a folded guide plate 23, which extends from the bottom to the top of the dissolution zone 6. The guide plate 23 can further refine the bubbles and prolong the gas-liquid contact time, effectively enhancing the dissolution efficiency of carbon dioxide; it can achieve an effective utilization rate of carbon dioxide of over 95%.

[0068] See Figure 3 The guide plate 23 can consist of multiple single plates connected end-to-end to form a folded or lightning-shaped guide plate. Each single plate can have multiple permeable holes arranged in a matrix, allowing water to flow through. Because adjacent single plates face different directions, the permeable holes on those plates also face different directions. These different orientations of the permeable holes can repeatedly change the direction of water flow, creating turbulence and resulting in more uniform mixing and improved carbon dioxide dissolution efficiency.

[0069] In the technical solution provided in this embodiment, the dissolving cavity 5 gradually narrows from bottom to top.

[0070] For example, see Figure 2 The left side wall of the dissolution chamber 5 gradually moves towards the right from bottom to top, causing the dissolution chamber 5 to gradually narrow from bottom to top, forming a spatial structure that is smaller at the top and larger at the bottom. This helps to compress and dissolve carbon dioxide gas, reduces gas accumulation in the upper space, and improves solubility.

[0071] In the technical solution provided in this embodiment, the top of the dissolving chamber 5 is connected to an exhaust pipe 11, and a pressure relief valve 12 is provided on the exhaust pipe 11.

[0072] The exhaust pipe 11 is equipped with a first pressure gauge 20.

[0073] For example, see Figure 2The top of the dissolving chamber 5 is equipped with an exhaust pipe 11, a first pressure gauge 20 and a pressure relief valve 12. The first pressure gauge 20 can detect the pressure change inside the dissolving chamber 5. When the pressure value rises above the safe pressure value, the pressure relief valve 12 automatically opens to release pressure, thereby improving operational safety.

[0074] The technical solution provided in this embodiment also includes an online pH meter 21. Probes are provided in both the inlet pipe 1 and the outlet pipe 9, and the probes are electrically connected to the online pH meter 21.

[0075] For example, see Figure 2 A first probe 4 is installed inside the inlet pipe 1 near the dissolving chamber 5, and a second probe 25 is installed inside the outlet pipe 9 near the dissolving chamber 5. An online pH meter 21 is electrically connected to both probes. The online pH meter 21 allows for real-time monitoring of the pH values ​​in the inlet pipe 1 and outlet pipe 9.

[0076] In the technical solution provided in this embodiment, the carbon dioxide supply system includes a liquid carbon dioxide storage tank 22 and a carbon dioxide vaporizer 17. The outlet of the liquid carbon dioxide storage tank 22 is connected to the inlet of the carbon dioxide vaporizer 17, and the outlet of the carbon dioxide vaporizer 17 is connected to the microporous aerator 13 through an aeration pipe 14. An electric regulating valve 15 is provided on the aeration pipe 14.

[0077] For example, see Figure 2 The outlet of the liquid carbon dioxide storage tank 22 is connected to the inlet of the carbon dioxide vaporizer 17 via a carbon dioxide delivery pipe 18, which is equipped with a delivery valve 19. The outlet of the carbon dioxide vaporizer 17 is connected to the microporous aerator 13 via an aeration pipe 14, which is equipped with an electric regulating valve 15, a gas flow meter 16, and a second pressure gauge 24.

[0078] The liquid carbon dioxide storage tank 22 and the carbon dioxide vaporizer 17 are both existing technologies. The liquid carbon dioxide storage tank 22 is a container for storing liquid carbon dioxide, and the carbon dioxide vaporizer 17 is a device for converting liquid carbon dioxide into gaseous carbon dioxide. The liquid carbon dioxide in the liquid carbon dioxide storage tank 22 enters the carbon dioxide vaporizer 17 through the carbon dioxide delivery pipe 18, becomes gaseous carbon dioxide, then enters the microporous aerator 13 through the aeration pipe 14, and finally enters the dissolution chamber 5. By adopting a liquid carbon dioxide storage method, not only is the storage capacity improved, but space utilization is also optimized and the floor space required is reduced.

[0079] The technical solution provided in this embodiment also includes a control module, and the online pH detection instrument 21 and the electric regulating valve 15 are both electrically connected to the control module.

[0080] The online pH meter 21 can monitor the pH value in the inlet pipe 1 and outlet pipe 9 in real time and transmit the pH value signal to the control module. The control module then transmits the control signal to the electric regulating valve 15 to realize the automatic adjustment of the carbon dioxide dosage, ensuring the accuracy and efficiency of water quality control.

[0081] For example, when the influent pH value is ≥8.0, if the residual aluminum in the effluent is ≥0.15mg / L, the control module controls the electric regulating valve 15 to increase the opening degree, thereby increasing the carbon dioxide dosage; when the residual aluminum in the effluent is <0.12mg / L, the control module controls the electric regulating valve 15 to decrease the opening degree, thereby reducing the carbon dioxide dosage, achieving precise carbon dioxide dosage and avoiding excessive dosage of the reagent.

[0082] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0083] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0084] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0085] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A carbon dioxide dosing system for water treatment, characterized by, Includes inlet pipe (1), dissolving chamber (5), outlet pipe (9), and carbon dioxide supply system; The dissolving chamber (5) is provided with a weir plate (7), which divides the interior of the dissolving chamber (5) into a dissolving zone (6) and an outlet zone (8). The dissolving zone (6) is provided with a microporous aerator (13). The water inlet pipe (1) is connected to the dissolving zone (6); The water outlet pipe (9) is connected to the water outlet area (8); The carbon dioxide supply system is used to supply carbon dioxide to the microporous aerator (13).

2. The carbon dioxide dosing system for water treatment according to claim 1, wherein The dissolution zone (6) is provided with a guide plate (23).

3. The carbon dioxide dosing system for water treatment according to claim 1, wherein The dissolution cavity (5) gradually narrows from bottom to top.

4. The carbon dioxide dosing system for water treatment according to claim 1, wherein The top of the dissolving chamber (5) is connected to an exhaust pipe (11), and a pressure relief valve (12) is provided on the exhaust pipe (11).

5. The carbon dioxide dosing system for water treatment according to claim 4, wherein The exhaust pipe (11) is equipped with a first pressure gauge (20).

6. The carbon dioxide dosing system for water treatment according to claim 1, wherein It also includes an online pH meter (21), and probes are provided in both the inlet pipe (1) and the outlet pipe (9), and the probes are electrically connected to the online pH meter (21).

7. The carbon dioxide dosing system for water treatment according to claim 6, wherein The carbon dioxide supply system is connected to the microporous aerator (13) through an aeration pipe (14), and an electric regulating valve (15) is provided on the aeration pipe (14).

8. The carbon dioxide dosing system for water treatment according to claim 7, wherein It also includes a control module, and the online pH meter (21) and the electric regulating valve (15) are both electrically connected to the control module.

9. The carbon dioxide dosing system for water treatment according to claim 7, wherein The carbon dioxide supply system includes a liquid carbon dioxide storage tank (22) and a carbon dioxide vaporizer (17). The outlet of the liquid carbon dioxide storage tank (22) is connected to the inlet of the carbon dioxide vaporizer (17), and the outlet of the carbon dioxide vaporizer (17) is connected to the microporous aerator (13) through the aeration pipe (14).

10. The carbon dioxide dosing system for water treatment according to claim 9, wherein The aeration pipe (14) is equipped with a gas flow meter (16) and a second pressure gauge (24).

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