A PAC dosing device used in conjunction with a mixer

Abstract

The utility model provides a kind of PAC dosing device used in collocation mixer, including medicine box, with the medicine box communication medicine extraction pipe, at least two with medicine extraction pipe communication branch pipe, dosing pump and control assembly, each branch pipe is equipped with blowdown pipe, filter assembly and first control valve, each filter assembly is equipped with filter tube, filter tube is equipped with inlet pipe, medicine branch pipe and second control valve, all medicine branch pipe communication is equipped with medicine inlet pipe, medicine inlet pipe is equipped with flow detection element and communication is equipped with pipeline mixer, preliminary mixing is carried out before sewage and medicament enter reaction tank by pipeline mixer, promote sewage and medicament mixing more evenly, control assembly according to the flow information detected by flow detection element controls the working state of each element to switch different filter assembly to carry out filtering work under the condition of not stopping machine, idle filter assembly can also be backflushed, improve sewage treatment efficiency.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a PAC dosing device used in conjunction with a mixer. Background Technology

[0002] PAC (polyaluminum chloride) is a highly efficient inorganic polymeric coagulant that achieves rapid water purification by neutralizing the charge of suspended particles in water and adsorbing impurities to form flocculent precipitates. When PAC dissolves in water, it hydrolyzes to generate a large number of positively charged hydroxyl complexes, which can quickly neutralize the negative charge of colloidal particles in the water, disrupting their stability. The particles then aggregate into large flocs through adsorption bridging, accelerating sedimentation and significantly reducing water turbidity. Therefore, PAC is commonly used in wastewater treatment. Currently, prepared PAC is typically stored in storage tanks, and a dosing pump, along with a suction pipe, draws the PAC from the storage tank to a reaction tank or reaction vessel to react with the wastewater for purification. However, current dosing equipment still has the following problems: 1. When the reagent is added directly to the reaction tank via a dosing pump, it is difficult to mix it thoroughly with the wastewater in the reaction tank, resulting in poor wastewater treatment effect; 2. To prevent impurities precipitated in the storage tank from flowing into the reaction tank, a filter screen is usually installed at the extraction pipe to filter out the precipitated impurities. However, after long-term use, the filter screen is prone to clogging, usually requiring shutdown for cleaning, which reduces the efficiency of wastewater treatment. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of the aforementioned technologies by proposing a PAC dosing device that is used in conjunction with a mixer, thereby solving the problems described above.

[0004] This utility model provides a PAC dosing device for use with a mixer, comprising: A medicine tank for storing medicines is connected to a medicine extraction pipe. The medicine extraction pipe is equipped with a dosing pump. The output end of the dosing pump is connected to at least two branch pipes. Each branch pipe is connected to a drain pipe and a filter assembly. A first control valve is installed at the connection point of the branch pipe, the drain pipe, and the filter assembly to adjust the connection between these three components. The dosing pump drives the medicine to flow from the branch pipe to the filter assembly. Each filter assembly is connected to a filter pipe. Each filter pipe is connected to a water inlet pipe and a medicine inlet branch pipe. A second control valve is installed at the connection point of the filter pipe, the water inlet pipe, and the medicine inlet branch pipe to adjust the connection between these three components. The water inlet pipe provides cleaning water to the filter assembly. The inlet pipe is connected to all the inlet branch pipes. The inlet pipe is equipped with a flow detection element for detecting its flow rate. The inlet pipe is connected to a pipe mixer. One end of the pipe mixer near the inlet pipe is connected to a sewage pipe for supplying sewage, and the other end is connected to a water outlet pipe. A control component is electrically connected to the first control valve, the second control valve, the flow detection element, and the dosing pump, and controls the operating status of the first control valve, the second control valve, the flow detection element, and the dosing pump.

[0005] Preferably, the present invention further includes a main water inlet pipe, which is connected to all the water inlet pipes and is used to supply water to all the water inlet pipes. The main water inlet pipe is equipped with a cleaning pump, and the control component is electrically connected to the cleaning pump and controls its working status.

[0006] Preferably, the sewage pipe is equipped with a sewage pump, and the control component is electrically connected to the sewage pump and controls its operating status.

[0007] Preferably, the control component is a PLC controller with a screen.

[0008] Preferably, the filter assembly includes a cylindrical body, a filter element, and an end cap. The cylindrical body has an opening and the end cap is installed at the opening. The filter element is installed in the inner cavity of the cylindrical body and has a cylindrical structure. The outer wall of the filter element and the inner wall of the cylindrical body form a filter cavity that communicates with the filter tube. Each cylindrical body is provided with a connecting pipe that communicates with the inner cavity of its filter element. The first control valve is located at the branch pipe, the drain pipe, and the connecting pipe and controls the communication status of the three.

[0009] Preferably, the cylinder is provided with a slot communicating with the connecting pipe, and the filter element is provided with a connecting pipe that is inserted into the slot.

[0010] Preferably, the slot is provided with an annular platform, and the annular platform is provided with a sealing ring for the connecting pipe to abut against.

[0011] Preferably, the end cap is provided with an external thread, and the cylinder is provided with an internal thread that mates with the external thread. The end cap abuts against one end of the filter element to maintain the tightness between the slot and the sealing ring.

[0012] Preferably, the axis of each cylinder is arranged in a vertical direction, the connecting pipe is located at the lower end of the cylinder, and the filter pipe is located on the side wall near the upper end of the cylinder.

[0013] Compared with the prior art, the present invention has the following advantages: 1. The wastewater and chemicals are initially mixed by a pipeline mixer before entering the reaction tank, which promotes more uniform mixing of wastewater and chemicals and improves the wastewater treatment effect.

[0014] 2. The control component controls the working status of each component based on the flow information detected by the flow detection element, thereby switching different filter components for filtration without stopping the machine. It can also backwash idle filter components, improving wastewater treatment efficiency and effectively maintaining the filtration performance of the filter components. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only preferred embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of the medicine box in one embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the dosing pump and cylinder in one embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the filter component in one embodiment of the present invention; Figure 4 This is a schematic diagram of the external structure of the pipe mixer in one embodiment of the present invention; Figure 5 This is a schematic diagram of the internal structure of the pipe mixer in one embodiment of the present invention.

[0017] Using support frames to fabricate pipelines and pump bodies is a common technique in this field. To avoid the support frame structure from obscuring the pipelines, the support frame structure for the pipelines and pump bodies is omitted in the above figures. The above figures are only used to highlight the structural diagrams of the various pipeline connections.

[0018] In the diagram, 1-medicine tank; 11-medicine extraction pipe; 12-dosing pump; 2-branch pipe; 21-sewage pipe; 3-filter assembly; 31-cylinder; 311-connecting pipe; 312-slot; 313-ring platform; 314-sealing ring; 32-filter element; 321-connecting pipe; 33-end cap; 4-first control valve; 5-filter pipe; 51-inlet pipe; 52-medicine inlet branch pipe; 6-second control valve; 7-medicine inlet pipe; 71-flow detection element; 8-pipe mixer; 81-sewage pipe; 82-outlet pipe; 9-control assembly; 10-main inlet pipe; 101-cleaning pump. Detailed Implementation

[0019] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in this specification of this utility model is for the purpose of describing particular embodiments only and is not intended to limit the utility model. In the following description, the expression "some embodiments" refers to a subset of all possible embodiments; however, it should be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments and can be combined with each other without conflict.

[0020] It should also be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "inner," "outer," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0021] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0022] This section will describe in detail the specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0023] Example 1: Reference Figures 1 to 5 This utility model provides a PAC dosing device for use with a mixer, comprising: A medicine tank 1 for storing medicines is connected to a medicine extraction pipe 11. The medicine extraction pipe 11 is equipped with a medicine dosing pump 12. The output end of the medicine dosing pump 12 is connected to at least two branch pipes 2. Each branch pipe 2 is connected to a drain pipe 21 and a filter assembly 3. A first control valve 4 is provided at the connection between the branch pipe 2, the drain pipe 21 and the filter assembly 3 to adjust the connection state of the three. The medicine dosing pump 12 is used to drive the medicine from the branch pipe 2 to the filter assembly 3. Each filter assembly 3 is connected to a filter pipe 5. Each filter pipe 5 is connected to a water inlet pipe 51 and a medicine inlet branch pipe 522. A second control valve 6 is provided at the connection between the filter pipe 5, the water inlet pipe 51 and the medicine inlet branch pipe 522 to adjust the connection state of the three. The water inlet pipe 51 is used to provide cleaning water to the filter assembly 3. The inlet pipe 7 is connected to all the inlet branch pipes 522. The inlet pipe 7 is equipped with a flow detection element 71 for detecting its flow rate. The inlet pipe 7 is connected to a pipe mixer 8. One end of the pipe mixer 8 near the inlet pipe 7 is connected to a sewage pipe 81 for supplying sewage, and the other end is connected to a sewage pipe 82. Control component 9 is electrically connected to the first control valve 4, the second control valve 6, the flow detection element 71, and the dosing pump 12, and controls the working status of the first control valve 4, the second control valve 6, the flow detection element 71, and the dosing pump 12.

[0024] The pipeline mixer 8 performs preliminary mixing of sewage and chemicals before they enter the reaction tank, promoting more uniform mixing and improving sewage treatment efficiency. The control component 9 can control the working status of each component based on the flow information detected by the flow detection element 71, thereby switching different filter components 3 for filtration without stopping the machine. It can also backwash idle filter components 3, improving sewage treatment efficiency and effectively maintaining the filtration performance of filter components 3.

[0025] Among them, the flow detection element 71 can be an electromagnetic flow meter known in the prior art; the pipe mixer 8 is a pipe structure with spiral blades in the inner cavity. The pipe mixer 8 is a commonly used technical means in this field, and will not be described in detail in this application.

[0026] The first control valve 4 operates as follows: When the first control valve 4 is in the first position, the connection between its corresponding branch pipe 2, drain pipe 21 and filter assembly 3 is closed, meaning the three are not connected to each other, and the filter assembly 3 is in standby mode. When the first control valve 4 is in the second position, its corresponding filter assembly 3 is connected to the branch pipe 2, and can cooperate with the dosing pump 12 to drive the agent through the filter assembly 3 for dosing, and the filter assembly 3 is in working mode. When the first control valve 4 is in the third position, its corresponding filter assembly 3 is connected to the drain pipe 21, and can cooperate with the water supply process of the water inlet pipe 51 to backwash the filter assembly 3, and the filter assembly 3 is in cleaning mode.

[0027] The second control valve 6 operates as follows: When the second control valve 6 is in the first position, the corresponding water inlet pipe 51, drug inlet branch pipe 522 and filter pipe 5 are closed, that is, the three are not connected to each other, and the filter assembly 3 is in standby state at this time. When the second control valve 6 is in the second position, the corresponding drug inlet branch pipe 522 is connected to the filter pipe 5, and can work with the dosing pump 12 to drive the agent through the filter assembly 3 for dosing. The filter assembly 3 is in working state at this time. When the second control valve 6 is in the third position, the corresponding water inlet pipe 51 is connected to the filter pipe 5, the water inlet pipe 51 supplies water to backwash the filter assembly 3 and can be discharged through the drain pipe 21. The filter assembly 3 is in cleaning state at this time.

[0028] The usage status of filter component 3 is as follows: The filter assembly 3 in standby mode has its corresponding first control valve 4 and second control valve 6 both in the first position. No reagent passes through the filter assembly 3. The operator can switch the first control valve 4 to the third position as needed to connect the filter assembly 3 to the drain pipe 21 so as to discharge the residual sewage inside the filter assembly 3 and clean or replace the filter assembly 3.

[0029] The filter assembly 3 is in the working state, and its corresponding first control valve 4 and second control valve 6 are both in the second working position. The dosing pump 12 draws the medicine from the medicine tank 1 through the medicine inlet pipe 7, the medicine extraction pipe 11, and the medicine inlet branch pipe 522, the filter pipe 5 and the branch pipe 2 corresponding to the filter assembly 3. The filter assembly 3 filters the medicine.

[0030] The filter assembly 3 is in the cleaning state, and its corresponding first control valve 4 and second control valve 6 are both located in the third position. The clean water provided by the water inlet pipe 51 backwashes the filter assembly 3 through the filter water pipe and the sewage pipe 21 corresponding to the filter assembly 3.

[0031] The control component 9 can detect the flow information in the drug inlet pipe 7 based on the flow detection element 71, and control the operating mode of each first control valve 4 and each second control valve 6 to switch the operating status of each filter component 3. Its specific operating mode is as follows: When the control component 9 detects that the current flow rate of the chemical inlet pipe 7 is below the set range, it indicates that the filter component 3 is blocked. The control component 9 then switches the currently operating filter component 3 to the cleaning state and switches other standby filter components 3 to the operating state. This process does not require stopping the system to clean the filter components 3, which can effectively improve wastewater treatment efficiency and maintain the filtration performance of the filter components 3. Operators can set the cleaning time of the filter components 3 in the cleaning state through the control component 9, or manually switch the filter components 3 in the cleaning state to the standby state after a certain cleaning period.

[0032] Furthermore, this application also includes a main water inlet pipe 1051, which is connected to all water inlet pipes 51 and used to supply water to all water inlet pipes 51. A cleaning pump 101 is installed in the main water inlet pipe 1051, and a control component 9 is electrically connected to the cleaning pump 101 and controls its operating state. The cleaning pump 101 provides pumping power for the water flow inside the main water inlet pipe 1051, and the control component 9 is electrically connected to the cleaning pump 101 and controls its operating state. The speed and start / stop status of the cleaning pump 101 can be controlled by the control component 9, thereby adjusting the water flow rate during cleaning of the filter assembly 3.

[0033] Specifically, the sewage pipe 81 is equipped with a sewage pump, and the control component 9 is electrically connected to the sewage pump and controls its operating status. The control component 9 can control the speed and start / stop status of the sewage pump to adjust the sewage inflow rate, thereby coordinating with the dosage of the chemical agent to achieve uniform mixing of sewage and chemical agent. In some embodiments, the sewage pipe 81 is equipped with an electromagnetic flowmeter for detecting the flow rate within the pipe. The control component 9 is electrically connected to the electromagnetic flowmeter and controls the operating status of the sewage pump based on the sewage flow rate information detected by the electromagnetic flowmeter.

[0034] Specifically, control component 9 is a PLC controller with a screen. Using a PLC controller with a screen to control the working status of various components in wastewater treatment is a conventional technique in this field and will not be elaborated upon in this application.

[0035] Specifically, both the first control valve 4 and the second control valve 6 are solenoid directional valves. Using solenoid directional valves to adjust the connectivity of pipelines is a conventional technique in this field and will not be elaborated upon here.

[0036] In some embodiments, a main sewage pipe 21 is provided that is connected to all sewage pipes 21, through which sewage can be centrally discharged for easy management.

[0037] Example 2: Reference Figures 1 to 5 In conjunction with the technical solution of Embodiment 1, in this embodiment, the filter assembly 3 includes a cylinder 31, a filter element 32, and an end cap 33. The cylinder 31 has an opening and an end cap 33 is installed at the opening. The filter element 32 is installed in the inner cavity of the cylinder 31. The filter element 32 has a cylindrical structure. The outer wall of the filter element 32 and the inner wall of the cylinder 31 form a filter cavity that communicates with the filter tube 5. Each cylinder 31 is provided with a connecting pipe 311 that communicates with the inner cavity of its filter element 32. The first control valve 4 is located at the branch pipe 2, the drain pipe 21, and the connecting pipe 311 and controls the communication status of the three.

[0038] When the first control valve 4 is in the first position, the corresponding branch pipe 2, drain pipe 21 and connecting pipe 311 are closed, meaning they are not connected to each other, and the filter assembly 3 is in standby mode. When the first control valve 4 is in the second position, its corresponding connecting pipe 311 is connected to the branch pipe 2, and can be used with the dosing pump 12 to drive the agent through the connecting pipe 311 for dosing, and the filter assembly 3 is in working mode. When the first control valve 4 is in the third position, its corresponding connecting pipe 311 is connected to the drain pipe 21, and can be used with the water supply process of the inlet pipe 51 to backwash the filter assembly 3, and the filter assembly 3 is in cleaning mode.

[0039] Specifically, the cylinder 31 is provided with a slot 312 that communicates with the connecting pipe 311, and the filter element 32 is provided with a connecting pipe 321 that is inserted into the slot 312. The end of the filter element 32 away from the connecting pipe 321 is a closed end. After the filter element 32 is installed in the cylinder 31, the sewage can only flow from the inner cavity of the filter element 32 through the filter holes on the side wall of the filter element 32 to the filtration chamber.

[0040] Specifically, a ring platform 313 is provided at the slot 312, and a sealing ring 314 is provided at the ring platform 313 for the connecting pipe 321 to abut against.

[0041] By setting a sealing ring 314, the sealing performance between the slot 312 and the connecting pipe 321 can be effectively improved, preventing water from leaking from the two pipe walls and helping to maintain the filtration effect of the filter element 32.

[0042] Specifically, the end cap 33 is provided with external threads, and the cylinder 31 is provided with internal threads that mate with the external threads. The end cap 33 abuts against one end of the filter element 32 to maintain the tight abutment between the slot 312 and the sealing ring 314.

[0043] The end cap 33 is detachable by using internal and external thread connection. The end cap 33 can be removed as needed to manually clean and replace the filter element 32.

[0044] Example 3: Reference Figures 1 to 5In conjunction with the technical solutions of Embodiments 1 and 2, in this embodiment, the axis of each cylinder 31 is arranged vertically, the connecting pipe 311 is located at the lower end of the cylinder 31, and the filter pipe 5 is located near the side wall of the upper end of the cylinder 31. By using vertically arranged cylinders 31, when the filter assembly 3 is in standby mode, the first control valve 4 can be switched to the third position to drive the sewage in the cylinder 31 to be discharged along the sewage pipe 81 under gravity. This facilitates manual cleaning and replacement of the filter element 32 after the sewage in the cylinder 31 has been drained.

[0045] The above description is merely a preferred embodiment of this utility model and does not constitute any limitation on this utility model. Any person skilled in the art can make many possible variations and modifications to the technical solution of this utility model, or modify it into equivalent embodiments, without departing from the scope of the technical solution of this utility model. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technology of this utility model without departing from the scope of the technical solution of this utility model shall fall within the protection scope of this technical solution.

Claims

1. A PAC dosing device for use with a mixer, characterized in that, include: A medicine tank for storing medicines is connected to a medicine extraction pipe. The medicine extraction pipe is equipped with a dosing pump. The output end of the dosing pump is connected to at least two branch pipes. Each branch pipe is connected to a drain pipe and a filter assembly. A first control valve is installed at the connection point of the branch pipe, the drain pipe, and the filter assembly to adjust the connection between these three components. The dosing pump drives the medicine to flow from the branch pipe to the filter assembly. Each filter assembly is connected to a filter pipe. Each filter pipe is connected to a water inlet pipe and a medicine inlet branch pipe. A second control valve is installed at the connection point of the filter pipe, the water inlet pipe, and the medicine inlet branch pipe to adjust the connection between these three components. The water inlet pipe provides cleaning water to the filter assembly. The inlet pipe is connected to all the inlet branch pipes. The inlet pipe is equipped with a flow detection element for detecting its flow rate. The inlet pipe is connected to a pipe mixer. One end of the pipe mixer near the inlet pipe is connected to a sewage pipe for supplying sewage, and the other end is connected to a water outlet pipe. A control component is electrically connected to the first control valve, the second control valve, the flow detection element, and the dosing pump, and controls the operating status of the first control valve, the second control valve, the flow detection element, and the dosing pump.

2. The PAC dosing device for use with a mixer according to claim 1, characterized in that, It also includes a main water inlet pipe, which is connected to all the water inlet pipes and is used to supply water to all the water inlet pipes. The main water inlet pipe is equipped with a cleaning pump, and the control component is electrically connected to the cleaning pump and controls its working status.

3. The PAC dosing device for use with a mixer according to claim 1, characterized in that, The sewage pipe is equipped with a sewage pump, and the control component is electrically connected to the sewage pump and controls its working status.

4. A PAC dosing device for use with a mixer according to any one of claims 1-3, characterized in that, The control component is a PLC controller with a screen.

5. A PAC dosing device for use with a mixer according to any one of claims 1-3, characterized in that, The filter assembly includes a cylinder, a filter element, and an end cap. The cylinder has an opening and the end cap is installed at the opening. The filter element is installed in the inner cavity of the cylinder and has a cylindrical structure. The outer wall of the filter element and the inner wall of the cylinder form a filter cavity that communicates with the filter tube. Each cylinder is provided with a connecting pipe that communicates with the inner cavity of its filter element. The first control valve is located at the branch pipe, the drain pipe, and the connecting pipe and controls the communication status of the three.

6. A PAC dosing device for use with a mixer according to claim 5, characterized in that, The cylinder is provided with a slot that communicates with the connecting pipe, and the filter element is provided with a connecting pipe that is inserted into the slot.

7. A PAC dosing device for use with a mixer according to claim 6, characterized in that, A ring-shaped platform is provided at the slot, and a sealing ring is provided at the ring-shaped platform for the connecting pipe to be pressed against.

8. A PAC dosing device for use with a mixer according to claim 7, characterized in that, The end cap is provided with an external thread, and the cylinder is provided with an internal thread that mates with the external thread. The end cap abuts against one end of the filter element to maintain the tightness between the slot and the sealing ring.

9. A PAC dosing device for use with a mixer according to claim 5, characterized in that, The axis of each cylinder is arranged vertically, the connecting pipe is located at the lower end of the cylinder, and the filter pipe is located on the side wall near the upper end of the cylinder.

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