A type of MVR water purification and recovery regulating device

Abstract

This utility model discloses an MVR water purification and recovery regulating device, relating to the field of wastewater treatment technology, including a throttling pipe assembly and a dosing device. The inlet end of the throttling pipe assembly is connected to a wastewater tank, and the outlet end is connected to a washing device. The pipes are used for the flow transport of production waste liquid to be treated. The dosing device is connected to the middle section of the throttling pipe assembly and has the ability to quantitatively dispense wastewater treatment agents into the pipes of the throttling pipe assembly. The layout structure of the internal pipes of the throttling pipe assembly at the dosing device has the ability to automatically agitate the liquid flow, so as to make the wastewater treatment agents and wastewater mix evenly. The internal pipes of the throttling pipe assembly of this utility model generate a disturbed vortex based on the principle of a Tesla valve, so that the wastewater treatment agents added by the dosing device are fully mixed and stirred with the liquid flow. This replaces the bulky stirring mechanism of the traditional kettle-type stirring device, reduces the equipment footprint, achieves the self-stirring effect of the liquid flow without external power supply, and reduces equipment energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to an MVR water purification and recovery regulating device. Background Technology

[0002] During the dye production process, a large amount of acidic wastewater is generated. After decolorization and evaporation and concentration by MVR equipment, a slightly acidic reclaimed water with a pH value between 3 and 4 is finally obtained. This reclaimed water can be adjusted to a pH value of around 7.5 by adding alkali solution and reused as wash water in the filtration and separation equipment used in dye production, such as filter presses, washing machines, and filter tanks. This saves a lot of fresh water, realizes the recycling of production wastewater, and reduces sewage discharge.

[0003] In existing technologies, pH adjustment of acidic recycled water typically employs a stirred tank mixer, which requires a large space and necessitates external power, increasing energy consumption. Furthermore, existing stirred tank mixers cannot provide real-time, high-precision monitoring of pH changes in the recycled water during the adjustment process, requiring multiple intermittent measurements, which is cumbersome. Utility Model Content

[0004] To address the issues mentioned in the background section regarding the existing reactor stirring and regulating devices requiring additional energy and cumbersome pH adjustment operations, an MVR water purification and recycling regulating device is proposed to facilitate the circulation and regulation of acidic recycled water.

[0005] This utility model discloses an MVR water purification and recovery regulating device, comprising a throttling pipe assembly and a dosing device; the inlet end of the throttling pipe assembly is connected to a wastewater tank, and the outlet end is connected to a washing device, with the pipeline used for the flow transport of production waste liquid to be treated; the dosing device is connected to the middle section of the throttling pipe assembly and has the ability to quantitatively dispense wastewater treatment agents into the pipeline of the throttling pipe assembly; the layout structure of the internal pipeline of the throttling pipe assembly at the dosing device has the ability to automatically agitate the liquid flow, so as to make the wastewater treatment agents and wastewater mix evenly.

[0006] As a further improvement of this utility model, the throttling pipe assembly includes a main pipe and at least two side pipes arranged along the axis of the main pipe. The side pipes are arranged around the main pipe, and the side pipes extend from the inlet end of the main pipe to the outlet end. The end of the side pipe near the inlet end of the main pipe serves as a diversion inlet, and the end of the side pipe near the outlet end of the main pipe serves as a diversion outlet. Both the diversion inlet and the diversion outlet are connected to the main pipe, and the side pipes constitute a diversion bypass of the main pipe. The pipe sections of the side pipes near the diversion inlet and the diversion outlet are inclined towards the outlet end of the main pipe, and the axes of the two side pipes form an acute angle with the axis of the main pipe. The pipe sections of the side pipes near the diversion outlet form a bend.

[0007] As a further improvement of this utility model, the side pipe includes an inner ring pipe wall and an outer ring pipe wall arranged around the outer periphery of the main pipe; the outer ring pipe wall is integrally sleeved on the outside of the inner ring pipe wall, and the two are fixedly connected to each other by several connecting ribs parallel to the axial direction of the main pipe; a gap cavity is formed between the outer ring pipe wall and the inner ring pipe wall, which extends with the two walls to serve as the drainage passage of the side pipe; both ends of the inner ring pipe wall and the outer ring pipe wall are connected to the outer periphery of the main pipe, and the drainage passages at both ends are tapered towards the water inlet end of the main pipe, forming an annular diversion inlet and diversion outlet, which connect to the internal drainage passage of the main pipe.

[0008] As a further improvement of this utility model, the dosing device includes a dosing pipe arranged in a ring on the outer side of the middle section of each side pipe; a number of connecting ribs are evenly spaced in the middle section of the drainage passage of the side pipe, forming a number of independent drainage cavities, and each independent drainage cavity is provided with a dosing port that penetrates the outer ring pipe wall and connects to the dosing pipe.

[0009] As a further improvement of this utility model, a drug inlet pipe is tangentially connected to the annular dosing pipe, and the drug inlet pipe has the ability to guide the wastewater treatment agent to circulate in the dosing pipe.

[0010] As a further improvement of this utility model, it also includes a control device, which includes a regulating valve installed on each drug inlet pipeline. The control device is electrically connected to the regulating valve and has the ability to control the opening and closing of the regulating valve to regulate the dosage of wastewater treatment agent.

[0011] As a further improvement of this utility model, it also includes several sets of detection devices, which have the ability to measure the acidity and alkalinity of liquids; the detection devices are respectively set at the inlet, outlet and middle section of the main pipeline, and the detection device located in the middle section of the main pipeline is also located between two adjacent side pipelines; the control device is electrically connected to the detection devices and has the ability to control and adjust the opening and closing of the regulating valve according to the changes in acidity and alkalinity measured by the detection devices.

[0012] As a further improvement of this utility model, the control device includes at least a set of coarse adjustment units and a set of fine adjustment units. Both the coarse adjustment units and the fine adjustment units are electrically connected to different regulating valves. The fine adjustment units can make more precise control over the output of the regulating valves than the coarse adjustment units.

[0013] As a further improvement of this utility model, the coarse adjustment unit is used to control the regulating valve of the drug inlet pipeline between the main pipeline inlet and the middle section, and the fine adjustment unit is electrically connected to the regulating valve of the drug inlet pipeline between the middle section and the outlet of the main pipeline.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. The side pipe of this utility model serves as a branch of the main pipe, diverting the liquid flow in the main pipe before it converges back into the main pipe. The liquid flow in the branch pipe that converges at the outlet of the branch pipe can intersect and collide with the main liquid flow in the main pipe, generating a disturbed vortex based on the principle of a Tesla valve. The wastewater treatment agent mixed into the side pipe branch by the dosing device can be fully mixed and stirred with the liquid flow in the main pipe along with the disturbed vortex. This replaces the bulky stirring mechanism of the traditional kettle-type stirring device, reducing the footprint of the equipment. At the same time, it achieves the self-stirring effect of the liquid flow without external power supply, reducing the energy consumption of the equipment.

[0015] 2. The side pipe of this utility model consists of two layers of overlapping pipe walls surrounding the main pipe. The dosing pipe is also arranged around the side pipe and uniformly dispenses wastewater treatment agents radially around the side pipe, which can further improve the mixing uniformity of wastewater treatment agents.

[0016] 3. This utility model provides a reference value for adjusting the dosage of wastewater treatment agents to the coarse adjustment unit and fine adjustment unit in the control device by using the real-time measured pH of the liquid flow from the detection device. It can achieve two-stage adjustment. The first stage rapidly neutralizes the liquid flow in the front section of the main pipeline to ensure that the pH of the liquid flow is neutralized. The second stage finely adjusts the pH in the rear section of the main pipeline to obtain the pH of about 7.5 required for the recycled water. It has the advantages of automatic and controllable adjustment process and real-time continuous adjustment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is an axial sectional view of the internal structure of the throttling tube assembly of this utility model; Figure 3 This is a partial cross-sectional schematic diagram of the connection structure between the throttling tube assembly and the dosing device of this utility model; Figure 4 This is a schematic diagram showing the specific flow path of the liquid inside the throttling tube assembly; Figure 5 This is a schematic diagram of the flow path of the drug inflow pipe of the dosing device; Figure 6 This is a schematic diagram showing the electrical connection relationship between the control device and the regulating valve and the detection device. 1. Throttling pipe assembly; 11. Main pipe; 12. Side pipe; 121. Diversion inlet; 122. Diversion outlet; 123. Turning point; 1201. Inner ring pipe wall; 1202. Outer ring pipe wall; 1203. Connecting rib; 2. Dosing device; 21. Dosing pipe; 211. Injection port; 22. Inlet pipe; 221. Regulating valve; 3. Detection device; 4. Control device; 41. Coarse adjustment unit; 42. Fine adjustment unit. Detailed Implementation

[0018] Specific Implementation Example 1: Please refer to the appendix Figure 1 -Appendix Figure 6 , An MVR water purification and recovery regulating device includes a throttling tube assembly 1, a dosing device 2, a detection device 3, and a control device 4.

[0019] The throttling pipe assembly 1 includes a main pipe 11 and a side pipe 12. For example... Figure 2As shown, the main pipe 11 is located at the center of the throttling pipe group 1. The inlet end on the right side of the main pipe 11 is connected to the wastewater tank, and the outlet end on the left side of the main pipe 11 is connected to the washing device. The main pipe 11 is used to transport liquid unidirectionally from the inlet end to the outlet end. The side pipe 12 consists of an inner ring pipe wall 1201 and an outer ring pipe wall 1202. The inner ring pipe wall 1201 is mainly a cylindrical pipe fitting. The diameter of the inner ring pipe wall 1201 is larger than the diameter of the main pipe 11 and is coaxially arranged on the outer periphery of the main pipe 11. Both ends of the inner ring pipe wall 1201 extend towards the axial side of the main pipe 11 and are sealed and fixed to the outer periphery of the main pipe 11. The outer ring pipe wall 1202 is completely sleeved and wrapped around the outer periphery of the inner ring pipe wall 1201. Both ends of the outer ring pipe wall 1202 also extend towards the axial side of the main pipe 11 and are sealed and fixed to the outer periphery of the main pipe 11. The outer surface of the inner ring pipe wall 1201 and the inner surface of the outer ring pipe wall 1202 are separated from each other, forming a gap cavity that extends along the walls of the two. The gap cavity between the two is the drainage passage of the side pipe 12. At the midpoint of the inner ring pipe wall 1201 along its axis, ten connecting ribs 1203 are arranged circumferentially around its axis at even intervals on the outer circumferential surface of the inner ring pipe wall 1201. The end of each connecting rib 1203 near the axis of the inner ring pipe wall 1201 is fixedly connected to the outer circumferential wall of the inner ring pipe wall 1201, and the end of each connecting rib 1203 away from the axis of the inner ring pipe wall 1201 is fixedly connected to the inner circumferential wall of the outer ring pipe wall 1202. The length direction of each connecting rib 1203 is parallel to the axis of the inner ring pipe wall 1201, thus evenly dividing the gap cavity between the inner ring pipe wall 1201 and the outer ring pipe wall 1202 at the midpoint of the axis into ten independent drainage channels. The inner ring wall 1201 and outer ring wall 1202 of the side pipe 12, where they extend and connect to the outer peripheral wall of the main pipe 11, both slope inwards towards the inlet end of the main pipe 11. Specifically, the connecting wall of the side pipe 12 near the inlet end of the main pipe 11 forms a protruding pointed cone shape, while the connecting wall of the side pipe 12 away from the inlet end of the main pipe 11 forms a funnel shape recessed inside the side pipe 12. The funnel-shaped connecting wall of the side pipe 12 transitions to the cylindrical main pipe wall in an arc shape, forming an arc-shaped bend 123. The internal cavity at the protruding pointed cone of the side pipe 12 penetrates the outer peripheral wall of the main pipe 11, forming an annular opening as a diversion inlet 121. The internal cavity at the recessed funnel-shaped part of the side pipe 12 also penetrates the outer peripheral wall of the main pipe 11, forming an annular opening as a diversion outlet 122.

[0020] The dosing device 2 includes a dosing pipe 21 and a drug inlet pipe 22. For example... Figure 3As shown, a circular dosing pipe 21 is coiled and connected to the outer circumference of the outer ring pipe wall 1202. Ten injection ports 211 are evenly spaced on the pipe wall connected to the outer ring pipe wall 1202. Each injection port 211 corresponds to a separate drainage path formed by connecting ribs 1203, enabling communication between the dosing pipe 21 and the internal drainage path of the side pipe 12. An inlet pipe 22 is tangentially connected to the dosing pipe 21 and is used to add wastewater treatment agents into the dosing pipe 21. The wastewater treatment agents flow tangentially into the dosing pipe 21 through the inlet pipe 22, swirling within the dosing pipe 21 and flowing into the side pipe 12 through the ten injection ports 211. A regulating valve 221 is installed on the inlet pipe 22 to control the flow rate.

[0021] The detection device 3 is a pH meter, capable of real-time detection of liquid pH values. The control device 4 is a PLC control unit, including a coarse adjustment unit 41 and a fine adjustment unit 42. Figure 5 and Figure 6 As shown, four side pipes 12 are arranged along the axial direction of the main pipe 11. Each side pipe 12 has a dosing pipe 21 on its outer periphery, and each side pipe 12 is individually dosed with wastewater treatment agents by a dosing pipe 22 equipped with a regulating valve 221. Three pH meters are installed on the main pipe 11, with the probes of the pH meters extending into the main pipe 11 to monitor the pH value of the liquid in the main pipe 11 in real time. The three pH meters are located at the inlet end of the main pipe 11, the outlet end of the main pipe 11, and the main pipe 11 between the second and third side pipes 12, respectively. The coarse adjustment unit 41 is electrically connected to the pH meter between the inlet end of the main pipe 11 and the structures of the second and third side pipes 12, and the coarse adjustment unit 41 is electrically controlled to the regulating valve 221 of the dosing device 2 on the two side pipes 12 near the inlet end of the main pipe 11; the fine adjustment unit 42 is electrically connected to the pH meter between the outlet end of the main pipe 11 and the structures of the second and third side pipes 12 of the main pipe 11, and the fine adjustment unit 42 is electrically controlled to the regulating valve 221 of the dosing device 2 on the two side pipes 12 on the outlet end of the main pipe 11.

[0022] Principle of liquid flow within the device: like Figure 4 As shown, in the throttling pipe assembly 1, wastewater flows in from the inlet of the main pipe 11. At the conical branch inlet 121, a portion of the wastewater flows into the side pipe 12, flowing towards the outlet of the main pipe 11. The diverted wastewater then changes direction under the guidance of the bend 123 in the side pipe 12, flowing towards the inlet of the main pipe 11, and then rejoins the wastewater in the main pipe 11 through the funnel-shaped branch outlet 122, as indicated by the flow direction marked at the confluence point in the figure. The rejoined branch wastewater and the wastewater in the main pipe 11 converge to create a turbulent vortex, resulting in a mixing effect. Figure 5 As shown, the wastewater treatment solution flows tangentially into the dosing pipe 21 under the guidance of the inlet pipe 22. It circulates within the dosing pipe 21 and flows evenly from the ten injection ports 211 into the ten drainage channels formed by the connecting ribs 1203. After the wastewater treatment agent and the diverted wastewater are mixed, they flow to the diversion outlet 122 in the manner described above. Under the eddy current agitation, the solution and wastewater are stirred and mixed evenly, thereby regulating the pH value of the wastewater.

[0023] The principle of wastewater treatment agent dosing control: The coarse adjustment unit 41 determines the real-time dosage of wastewater treatment chemicals by measuring the pH meter reading at the inlet end of the main pipeline 11. To achieve the target pH value of 7.5 for the treated liquid, the coarse adjustment unit 41 controls the opening of the regulating valves 221 on the two side pipelines 12 near the inlet end of the main pipeline 11 to deliver the wastewater treatment chemicals. Based on the pH meter readings between the second and third side pipelines 12 on the main pipeline 11, the coarse adjustment unit 41 adjusts the opening and closing of the two regulating valves 221 to roughly adjust the dosage of the chemicals, ensuring that the pH value of the flowing wastewater quickly reaches the target value. Within the neutral range, the fine adjustment unit 42 adjusts the opening and closing of the regulating valve 221 of the dosing device 2 on the two side pipes 12 on one side of the main pipe 11 based on the pH meter readings between the second and third side pipes 12 of the main pipe 11 and at the outlet of the main pipe 11. The fine adjustment unit 42 can make more precise control over the output of the regulating valve 221 than the coarse adjustment unit 41, and make sensitive small-dose adjustments to the added wastewater treatment agent, accurately controlling the pH value of the treated wastewater to about 7.5, so as to serve as the recycled water required for the operation of the subsequent washing device, thereby realizing the recycling of dye production wastewater.

[0024] The above description is only a preferred embodiment of the present utility model and is intended to illustrate the principle and effect of the present utility model, and is not intended to limit the present utility model. All variations, modifications and substitutions within the spirit and principle of the present design are within the protection scope of the present utility model.

Claims

1. An MVR water purification and recovery regulating device, characterized in that: It includes a throttling pipe assembly (1) and a dosing device (2); the inlet end of the throttling pipe assembly (1) is connected to a wastewater tank, and the outlet end is connected to a washing device. The pipeline is used to transport the production waste liquid to be treated; the dosing device (2) is connected to the middle section of the throttling pipe assembly (1) and has the ability to quantitatively deliver wastewater treatment agents into the pipeline of the throttling pipe assembly (1); the layout structure of the internal pipeline of the throttling pipe assembly (1) at the dosing device (2) has the ability to automatically generate agitation of the liquid flow so that the wastewater treatment agents and wastewater are mixed evenly.

2. The MVR water purification and recovery regulating device according to claim 1, characterized in that: The throttling pipe assembly (1) includes a main pipe (11) and at least two side pipes (12) arranged along the axis of the main pipe (11). The side pipes (12) are arranged around the main pipe (11), and the side pipes (12) extend from the inlet end of the main pipe (11) to the outlet end. The end of the side pipe (12) near the inlet end of the main pipe (11) serves as a diversion inlet (121), and the end of the side pipe (12) near the outlet end of the main pipe (11) serves as a diversion outlet (122). Both the inlet (121) and the branch outlet (122) are connected to the main pipe (11), and the side pipe (12) constitutes a branch bypass of the main pipe (11). The pipe sections of the side pipe (12) near the branch inlet (121) and the branch outlet (122) are inclined towards the outlet end of the main pipe (11), and the axes of the two side pipes (12) form an acute angle with the axis of the main pipe (11). The side pipe (12) forms a curved turn (123) in the pipe section near the branch outlet (122).

3. The MVR water purification and recovery regulating device according to claim 2, characterized in that: The side pipe (12) includes an inner ring wall (1201) and an outer ring wall (1202) surrounding the outer periphery of the main pipe (11). The outer ring wall (1202) is fitted over the outer side of the inner ring wall (1201), and the two are fixedly connected by several connecting ribs (1203) parallel to the axial direction of the main pipe (11). A gap cavity is formed between the outer ring wall (1202) and the inner ring wall (1201) extending with the two walls to serve as a drainage passage for the side pipe (12). Both ends of the inner ring wall (1201) and the outer ring wall (1202) are connected to the outer periphery of the main pipe (11). The drainage passages at both ends are tapered towards the water inlet of the main pipe (11) and form an annular diversion inlet (121) and a diversion outlet (122) to connect the internal drainage passage of the main pipe (11).

4. The MVR water purification and recovery regulating device according to claim 3, characterized in that: The dosing device (2) includes a dosing pipe (21) arranged in a ring on the outer side of the middle section of each side pipe (12); several connecting ribs (1203) are evenly spaced in the middle section of the drainage passage of the side pipe (12), forming several independent drainage cavities, and each independent drainage cavity is provided with a dosing port (211) that penetrates the outer ring pipe wall (1202) and connects to the dosing pipe (21).

5. The MVR water purification and recovery regulating device according to claim 4, characterized in that: A dosing pipe (21) is tangentially connected to an inlet pipe (22), which has the ability to guide the wastewater treatment agent to circulate in the dosing pipe (21).

6. The MVR water purification and recovery regulating device according to claim 5, characterized in that: It also includes a control device (4), which includes a regulating valve (221) installed on each drug inlet pipeline (22). The control device (4) is electrically connected to the regulating valve (221) and has the ability to control the opening and closing of the regulating valve (221) to regulate the amount of wastewater treatment agent delivered.

7. The MVR water purification and recovery regulating device according to claim 6, characterized in that: It also includes several sets of detection devices (3), which have the ability to measure the acidity and alkalinity of liquids; the detection devices (3) are respectively set at the inlet and outlet of the main pipe (11) and at the middle section of the main pipe (11), and the detection device (3) located at the middle section of the main pipe (11) is also located between two adjacent side pipes (12); the control device (4) is electrically connected to the detection device (3) and has the ability to control and adjust the opening and closing amount of the regulating valve (221) according to the change in acidity and alkalinity measured by the detection device (3).

8. The MVR water purification and recovery regulating device according to claim 7, characterized in that: The control device (4) includes at least a set of coarse adjustment units (41) and a set of fine adjustment units (42). Both the coarse adjustment unit (41) and the fine adjustment unit (42) are electrically connected to different regulating valves (221). The fine adjustment unit (42) can output more precise control to the regulating valve (221) than the coarse adjustment unit (41).

9. The MVR water purification and recovery regulating device according to claim 8, characterized in that: The coarse adjustment unit (41) is used to control the regulating valve (221) of the drug inlet pipeline (22) between the inlet and the middle section of the main pipeline (11). The fine adjustment unit (42) is electrically connected to the regulating valve (221) of the drug inlet pipeline (22) between the middle section and the outlet of the main pipeline (11).

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