Pac liquid high-efficiency uniform mixing device

Abstract

The utility model discloses a kind of PAC liquid high-efficiency uniform mixing device, including tank and water distributor. Tank is vertical cylindrical structure, and inlet and outlet are provided on tank. Inlet is used to introduce PAC liquid, and outlet is used to discharge diluent of PAC. Water distributor is installed at the bottom of tank, including water distribution main pipe and multiple water distribution branch pipes. Water distribution main pipe passes through the lateral wall of tank and is sealingly connected with tank, and at least one end of water distribution main pipe is used to directly or indirectly connect tap water pipeline. Water distribution branch pipe is fixedly connected with water distribution main pipe, and is communicated with water distribution main pipe. Water distribution branch pipe is provided with water distribution hole, and at least part of water distribution hole vertically upward or obliquely upward water distribution. Compared with prior art, the utility model can reduce equipment cost and energy consumption while ensuring mixing effect.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, and in particular to a PAC liquid high-efficiency uniform mixing device. Background Technology

[0002] PAC liquid, also known as basic aluminum chloride, has a density of 1.1~1.3 g / cm³. It is a water-soluble inorganic polymeric coagulant, produced by the bridging effect of hydroxide ions and the polymerization of polyvalent anions, resulting in a high molecular weight and high charge inorganic polymeric water treatment agent. During its hydrolysis, it undergoes physical changes such as electrochemical processes, coagulation, adsorption, and precipitation, thereby achieving the purpose of purifying water. PAC liquid is a colorless or yellowish-brown liquid with an aluminum oxide content ≥10%. It is generally diluted 1 to 9 times before use, and is precisely added using a metering pump according to the daily usage.

[0003] Traditional dilution and mixing methods involve pumping a 10% concentration of PAC into a columnar tank, then injecting pressurized tap water according to the set dilution ratio. The mixture is then thoroughly mixed with water through prolonged stirring, aeration, and centrifugal pump circulation. Because the PAC solution is acidic, materials in contact with the reagent, such as the mixer and centrifugal pump, must be corrosion-resistant, resulting in high equipment costs and energy consumption. Utility Model Content

[0004] The purpose of this invention is to provide a highly efficient and uniform mixing device for PAC liquids to solve the problems existing in the above-mentioned related technologies, and to reduce equipment costs and energy consumption while ensuring the mixing effect.

[0005] To achieve the above objectives, this utility model provides the following solution: This utility model discloses a high-efficiency and uniform mixing device for PAC liquid, comprising: The tank body is a vertical cylindrical structure, and the tank body is provided with a drug inlet and a liquid outlet; the drug inlet is used to introduce PAC liquid, and the liquid outlet is used to discharge the diluted PAC solution; A water distributor is installed at the bottom of the tank and includes a main water distribution pipe and multiple branch water distribution pipes. The main water distribution pipe passes through the side wall of the tank and is sealed to the tank. At least one end of the main water distribution pipe is used to directly or indirectly connect to a tap water pipeline. The branch water distribution pipes are fixedly connected to the main water distribution pipe and communicate with the main water distribution pipe. The branch water distribution pipes are provided with water distribution holes, and at least some of the water distribution holes are vertically upward or inclined upward to distribute water.

[0006] In some examples, the branch water distribution pipe and the main water distribution pipe are located on the same horizontal plane.

[0007] In some examples, the main water distribution pipe is laid along the diameter of the tank; there are multiple water distribution branch pipes, which are distributed on both sides of the main water distribution pipe.

[0008] In some examples, the water distribution branch pipe is perpendicular to the water distribution main pipe, and one end of the water distribution branch pipe is fixedly connected to the water distribution main pipe.

[0009] In some examples, the water distribution branch pipes are spaced apart along the extension direction of the main water distribution pipe.

[0010] In some examples, the water distribution hole includes an upper water distribution hole located at the upper end of the water distribution branch pipe and arranged vertically.

[0011] In some examples, the inlet is connected to an inlet pipe, which is equipped with an inlet flow meter and an inlet valve.

[0012] In some examples, at least one end of the main water distribution pipe is provided with a water inlet, the water inlet is connected to a water inlet pipe, and the water inlet pipe is equipped with a water inlet valve, an online water pressure monitoring instrument and a water flow meter; the water inlet pipe is used to connect to a tap water pipeline.

[0013] In some examples, the outlet is connected to an outlet pipe, which is equipped with an outlet valve and an online Baumé meter.

[0014] In some examples, the PAC liquid high-efficiency uniform mixing device further includes a controller, a level gauge, and an alarm; the input terminal of the controller is electrically connected to the drug flow meter, the online inlet water pressure monitor, the inlet water flow meter, the online Baume meter, and the level gauge, respectively; the output terminal of the controller is electrically connected to the alarm.

[0015] This utility model achieves the following technical advantages compared to related technologies: Tap water with a certain pressure is supplied by the water pipe. It enters the main water distribution pipe from the end located on the outside of the tank, and then flows into the tank along the main water distribution pipe. After that, it is divided into multiple branch water distribution pipes and flows out from the water distribution holes on the branch water distribution pipes. Under the action of the water distributor, the kinetic energy is dispersed into multiple streams of water sprayed from the multiple water distribution holes. The multiple streams of water flow upward at an angle or vertically.

[0016] PAC liquid near the multiple water streams is swept upwards by the upward-flowing water and mixes with the water streams during this process. Due to the fact that PAC has a higher density than tap water, PAC liquid that is farther away from the multiple water streams and has not been fully mixed with them flows downwards under the influence of gravity and water flow disturbance, and mixes again with the newly injected multiple water streams. This achieves a uniform concentration dilution and mixing without stratification, significantly shortening the overall uniform mixing time.

[0017] In the above process, the water pressure of the tap water itself serves as the driving force, eliminating the need for additional stirring equipment and electricity. Furthermore, the density difference between tap water and PAC, along with the upward flow of the tap water, creates convection within the tank, enhancing mixing efficiency. Moreover, the tap water is dispersed into multiple streams by the water distributor, increasing the contact area with the PAC liquid and resulting in a more uniform distribution of the tap water within the tank, further improving mixing efficiency. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or related technologies, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of a PAC liquid high-efficiency uniform mixing device in some examples of this utility model; Figure 2 for Figure 1 A cross-sectional view along the AA direction.

[0020] In the diagram: 1-Tank body; 2-Medicine inlet; 3-Left water inlet; 4-Left threaded connector; 5-Main water distribution pipe; 6-Branch water distribution pipe; 7-Water distribution hole; 8-Right water inlet; 9-Right threaded connector; 10-Outlet; 11-Medicine inlet valve; 12-Left water inlet valve; 13-Right water inlet valve; 14-Outlet valve; 15-Level gauge; 16-Medicine inlet flow meter; 17-Left water inlet flow meter; 18-Left water inlet online pressure monitor; 19-Right water inlet flow meter; 20-Right water inlet online pressure monitor; 21-Online Baume meter. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] The purpose of this invention is to provide a highly efficient and uniform mixing device for PAC liquids to solve the problems existing in the above-mentioned related technologies, and to reduce equipment costs and energy consumption while ensuring the mixing effect.

[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] Reference Figure 1 , Figure 2 This embodiment provides a highly efficient and uniform mixing device for PAC liquid, including a tank 1 and a water distributor. The tank 1 is a vertical cylindrical structure, with a drug inlet 2 and a liquid outlet 10. The drug inlet 2 is used to introduce PAC liquid, and the liquid outlet 10 is used to discharge diluted PAC. The water distributor is installed at the bottom of the tank 1 and includes a main water distribution pipe 5 and a branch water distribution pipe 6. The main water distribution pipe 5 passes through the side wall of the tank 1 and is sealed to the tank 1. At least one end of the main water distribution pipe 5 is used to directly or indirectly connect to a tap water pipeline. The branch water distribution pipe 6 is fixedly connected to the main water distribution pipe 5 and communicates with the main water distribution pipe 5. The branch water distribution pipe 6 is provided with water distribution holes 7, at least some of which are vertically upward or inclined upward (referring to the axial direction of the water distribution hole 7) for water distribution.

[0025] The working principle of the PAC liquid high-efficiency uniform mixing device in this embodiment is as follows: Tap water with a certain pressure, supplied by the water pipe, enters the main water distribution pipe 5 from the end located on the outside of the tank body 1, and then flows into the tank body 1 along the main water distribution pipe 5. After that, it is divided into multiple branch water distribution pipes 6 and flows out from the water distribution holes 7 on the branch water distribution pipes 6. Under the action of the water distributor, the kinetic energy is dispersed into multiple streams of water sprayed from the multiple water distribution holes 7, and the multiple streams of water flow upward at an angle or vertically.

[0026] PAC liquid near the multiple water streams is "swept" upwards by the upward-flowing water streams and mixes with them during the flow. Due to the fact that the density of PAC (1.1~1.3 g / cm³) is greater than that of tap water (1 g / cm³), PAC liquid farther away from the multiple water streams that has not been fully mixed with them flows downwards under the influence of gravity and water flow disturbance, and mixes again with the newly injected multiple water streams. This achieves uniform concentration dilution and mixing without stratification, and significantly shortens the overall uniform mixing time.

[0027] In the above process, the water pressure of the tap water itself serves as the driving force, eliminating the need for additional stirring equipment and electricity. Furthermore, the density difference between tap water and PAC, along with the upward flow of the tap water, creates convection within tank 1, enhancing mixing efficiency. Moreover, the tap water is dispersed into multiple streams by the water distributor, increasing the contact area with the PAC liquid and resulting in a more uniform distribution of tap water within tank 1, further improving mixing efficiency.

[0028] In some examples, the branch water pipe 6 and the main water pipe 5 are located on the same horizontal plane.

[0029] Depending on the actual needs, those skilled in the art may also choose other settings, such as setting the water distribution branch pipe 6 at an angle relative to the horizontal plane, or setting multiple water distribution branch pipes 6 on different horizontal planes.

[0030] It is understandable that the branch water pipe 6 and the main water pipe 5 can be straight pipes or bends, as long as they can distribute the tap water into multiple streams.

[0031] In some examples, the main water distribution pipe 5 is laid along the diameter of the tank 1. There are multiple branch water distribution pipes 6, which are distributed on both sides of the main water distribution pipe 5.

[0032] The main water distribution pipe 5 is a straight pipe, which facilitates its installation on the tank body 1. The branch water distribution pipes 6 are distributed on both sides of the main water distribution pipe 5, so that upward water flow from the water distribution holes 7 is formed on both sides of the main water distribution pipe 5, thereby enabling the PAC liquid on both sides of the main water distribution pipe 5 to be effectively mixed.

[0033] In some examples, the water distribution branch pipe 6 is perpendicular to the water distribution main pipe 5, and one end of the water distribution branch pipe 6 is fixedly connected to the water distribution main pipe 5.

[0034] The water distribution branch pipe 6 is a straight pipe, which facilitates production and fixed connection to the main water distribution pipe 5.

[0035] Since the cross-section of the tank 1 is circular, the length of the water distribution branch pipe 6 should be adapted to its location, so that there is a gap between the end of the water distribution branch pipe 6 and the tank 1, so as to facilitate the installation and removal of the water distribution branch pipe 6 inside the tank 1.

[0036] In some examples, the water distribution branch pipes 6 are spaced apart along the extension direction of the main water distribution pipe 5, and preferably spaced at equal intervals.

[0037] However, the actual implementation is not limited to this. For example, the water distribution branch pipes 6 on both sides of the main water distribution pipe 5 can be arranged symmetrically about the main water distribution pipe 5, and the water distribution branch pipes 6 on the same side of the main water distribution pipe 5 are preferably arranged at equal intervals.

[0038] In some examples, the water distribution hole 7 includes an upper water distribution hole located at the upper end of the water distribution branch pipe 6 and arranged vertically.

[0039] The vertically arranged upper water distribution hole allows tap water to flow vertically upward out of the water distribution branch pipe 6, avoiding the loss of tap water kinetic energy caused by tap water impacting the tank 1 in other directions of the water distribution hole 7.

[0040] Preferably, multiple upper water distribution holes are provided on the water distribution branch pipe 6, and the multiple upper water distribution holes are distributed at equal intervals along the extension direction of the water distribution branch pipe 6.

[0041] It is understandable that the water distribution hole 7 may also include a lower water distribution hole located at the lower end of the water distribution branch pipe 6 and vertically arranged, so as to impact the PAC located below the water distributor at the bottom of the tank 1 through the lower water distribution hole, thereby avoiding the formation of PAC sediment at the bottom of the tank 1.

[0042] In some examples, both the main water distribution pipe 5 and the branch water distribution pipes 6 are made of ABS material. The distance between two adjacent branch water distribution pipes 6 on the same side of the main water distribution pipe 5 is 200~500mm to ensure water distribution density. Although PAC is slightly acidic, the acidity is weak and it does not contain strong oxidizing components or organic solvents. ABS material itself has good resistance to dilute acids and inorganic salt solutions, and will not be corroded by PAC solutions, nor is it prone to swelling, cracking, or performance degradation.

[0043] In some examples, the inlet 2 is connected to an inlet pipe, on which an inlet flow meter 16 and an inlet valve 11 are installed.

[0044] The drug flow meter 16 can monitor the flow rate of PAC liquid entering the tank 1 in real time, and the drug inlet valve 11 can control the supply of PAC liquid to the tank 1.

[0045] In some examples, at least one end of the main water distribution pipe 5 is provided with an inlet, which is connected to an inlet pipe equipped with an inlet valve, an online inlet pressure monitor, and an inlet flow meter. The inlet pipe is used to connect to the municipal water supply line.

[0046] Because there is a pressure drop of tap water along the extension direction of the water distribution main pipe 5, for tanks with larger diameters 1, water inlets need to be set at both ends of the water distribution main pipe 5 to ensure that the pressure of the tap water flowing out of the water distribution hole 7 is not too low.

[0047] The online pressure monitoring device can monitor the tap water pressure at the inlet of the main water distribution pipe 5 in real time, the inlet flow meter can monitor the flow rate of tap water at the inlet of the main water distribution pipe 5 in real time, and the inlet valve can control the supply of tap water to the main water distribution pipe 5.

[0048] Figure 1 and Figure 2In the example shown, the water inlets at both ends of the main water distribution pipe 5 are a left inlet 3 and a right inlet 8, respectively. The inlet pipe connected to the left inlet 3 is the left inlet pipe, and the inlet pipe connected to the right inlet 8 is the right inlet pipe. The inlet valve, online pressure monitor, and flow meter on the left inlet pipe are left inlet valve 12, left online pressure monitor 18, and left flow meter 17, respectively. The inlet valve, online pressure monitor, and flow meter on the right inlet pipe are right inlet valve 13, right online pressure monitor 20, and right flow meter 19, respectively. The left inlet 3 and right inlet 8 are provided with external threads. The external thread of the left inlet 3 is threaded to the left threaded connector 4 at the end of the left inlet pipe, and the external thread of the right inlet 8 is threaded to the right threaded connector 9 at the end of the right inlet pipe.

[0049] In some examples, the outlet 10 is connected to an outlet pipe, on which an outlet valve 14 and an online Baume meter 21 are installed.

[0050] The online Baume meter 21 can monitor the concentration of PAC diluent flowing out of the outlet tube in real time, and the outlet valve 14 can control the on / off flow of PAC diluent.

[0051] In some examples, the PAC liquid high-efficiency uniform mixing device also includes a controller, a level gauge 15, and an alarm. The controller's inputs are electrically connected to the drug flow meter 16, the online inlet water pressure monitor, the inlet water flow meter, the online Baumé meter 21, and the level gauge 15, respectively. The controller's output is electrically connected to the alarm.

[0052] When preparing PAC diluent, first open the inlet valve 11 and introduce undiluted PAC liquid into tank 1 through the inlet pipe. After the level gauge 15 detects that the liquid level has reached the set liquid level (the liquid level refers to undiluted PAC liquid), close the inlet valve 11. The controller compares the inlet flow rate data fed back by the inlet flow meter 16 with the inlet flow rate data fed back by the level gauge 15. If the error exceeds the preset error range, an alarm control signal is sent to the alarm, and the alarm will sound.

[0053] Then, the inlet valve is opened, and tap water enters the main water distribution pipe 5 through the inlet, and then sprays out from the water distribution holes 7 of the branch water distribution pipe 6. The controller compares the inlet pressure data fed back by the online inlet pressure monitoring instrument with the preset pressure (e.g., 0.2MPa, 0.25MPa, 0.3MPa, etc.). If it exceeds the preset error range, an alarm control signal is sent to the alarm, and the alarm sounds. After the level gauge 15 detects that the liquid level has reached the set diluent level, the inlet valve is closed. The controller compares the inlet flow data fed back by the inlet flow meter with the inlet flow data fed back by the level gauge 15. If it exceeds the preset error range, an alarm control signal is sent to the alarm, and the alarm sounds.

[0054] After mixing, the outlet valve 14 is opened, and the PAC diluent flows out of the tank 1 through the outlet pipe. The controller compares the concentration of the PAC diluent fed back by the online Baume meter 21 with the preset concentration. If it exceeds the preset error range, an alarm control signal is sent to the alarm, and the alarm is activated.

[0055] The drug inlet valve 11, water inlet valve, and liquid outlet valve 14 are all preferably solenoid valves and are electrically connected to the controller, which controls their opening and closing to improve the degree of automation.

[0056] In some examples, refer to Figure 1 The inlet 2 is preferably located at the top of the tank body 1, and the outlet 10 is preferably located at the bottom of the tank body 1.

[0057] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A highly efficient and uniform mixing device for PAC liquid, characterized in that, include: The tank body is a vertical cylindrical structure, and the tank body is provided with a drug inlet and a liquid outlet; the drug inlet is used to introduce PAC liquid, and the liquid outlet is used to discharge the diluted PAC solution; A water distributor is installed at the bottom of the tank and includes a main water distribution pipe and multiple branch water distribution pipes. The main water distribution pipe passes through the side wall of the tank and is sealed to the tank. At least one end of the main water distribution pipe is used to directly or indirectly connect to a tap water pipeline. The branch water distribution pipes are fixedly connected to the main water distribution pipe and communicate with the main water distribution pipe. The branch water distribution pipes are provided with water distribution holes, and at least some of the water distribution holes are vertically upward or inclined upward to distribute water.

2. The PAC liquid high-efficiency uniform mixing device according to claim 1, characterized in that: The branch water distribution pipe and the main water distribution pipe are located on the same horizontal plane.

3. The PAC liquid high-efficiency uniform mixing device according to claim 2, characterized in that: The main water distribution pipe is laid along the diameter of the tank; there are multiple water distribution branch pipes, which are distributed on both sides of the main water distribution pipe.

4. The PAC liquid high-efficiency uniform mixing device according to claim 3, characterized in that: The water distribution branch pipe is perpendicular to the water distribution main pipe, and one end of the water distribution branch pipe is fixedly connected to the water distribution main pipe.

5. The PAC liquid high-efficiency uniform mixing device according to claim 3, characterized in that: The water distribution branch pipes are spaced apart along the extension direction of the main water distribution pipe.

6. The PAC liquid high-efficiency uniform mixing device according to claim 1, characterized in that: The water distribution hole includes an upper water distribution hole located at the upper end of the water distribution branch pipe and arranged vertically.

7. The PAC liquid high-efficiency uniform mixing device according to claim 1, characterized in that: The inlet is connected to an inlet pipe, and an inlet flow meter and an inlet valve are installed on the inlet pipe.

8. The PAC liquid high-efficiency uniform mixing device according to claim 7, characterized in that: At least one end of the main water distribution pipe is provided with a water inlet, the water inlet is connected to a water inlet pipe, and a water inlet valve, an online water pressure monitoring instrument and a water flow meter are installed on the water inlet pipe; the water inlet pipe is used to connect to the tap water pipeline.

9. The PAC liquid high-efficiency uniform mixing device according to claim 8, characterized in that: The outlet is connected to an outlet pipe, and an outlet valve and an online Baume meter are installed on the outlet pipe.

10. The PAC liquid high-efficiency uniform mixing device according to claim 9, characterized in that: It also includes a controller, a level gauge, and an alarm; the input terminal of the controller is electrically connected to the drug flow meter, the online water pressure monitor, the water flow meter, the online Baume meter, and the level gauge, respectively; the output terminal of the controller is electrically connected to the alarm.

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