A sewage treatment agent dosing device

Abstract

The utility model relates to sewage treatment technical field, concretely relates to a sewage treatment reagent feeding device, including inlet pipe and medicine inlet pipe, inlet pipe and medicine inlet pipe are connected with measuring pump respectively, the front end of measuring pump is provided with Y type filter, and the measuring pump is provided with installation valve, and the pulse damper and back pressure valve are installed on the conveying pipeline of the rear side of measuring pump, the utility model discloses feeding device, the above-mentioned pipeline system one spare one use setting, and the conveying pipeline of two sets of pipeline systems is linked together. The utility model discloses pipeline system one spare one use setting, and is equipped with the cleaning water pipeline and the cross communication pipeline, so that the utility model discloses in the process of using can realize the stable and reliable operation of device, and has the positive significance to guarantee the stable feeding of reagent and the stable operation of sewage treatment system.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a wastewater treatment agent dosing device. Background Technology

[0002] Wastewater is generated during people's production and daily life. In order to purify and recycle water resources, wastewater is generally treated in wastewater treatment plants to achieve purification and regeneration. Currently, municipal wastewater treatment plants mostly use biological treatment methods, which decompose COD, nitrogen and phosphorus in wastewater through the activity of microorganisms to purify water quality.

[0003] Wastewater treatment requires the consumption of certain chemicals. For example, in the process of denitrification, microorganisms need to consume carbon sources. Wastewater generally has low carbon and nitrogen content, so additional replenishment is necessary. The effluent from biological systems often contains high levels of phosphorus, requiring further phosphorus removal in the downstream tertiary treatment process. Chemical phosphorus removal methods are commonly used, such as adding coagulants like PAC to high-efficiency sedimentation tanks. In addition, the operation of wastewater treatment involves the addition of various other chemicals, including flocculants, pH adjusters, and weak organic acids.

[0004] In wastewater treatment, to ensure the stable operation of the biological system and control the cost of chemicals, chemicals are generally added in measured quantities according to actual production needs, ensuring stability during the addition process. Therefore, in actual production, dosing devices are generally used for dosing, employing metering pumps and pulse dampers to achieve continuous and stable dosing, which plays a crucial role in ensuring the stable operation of the wastewater treatment system and the stable quality of effluent. However, in actual production, operating conditions are complex and variable, with equipment blockages and component failures requiring maintenance and repair. Under various uncertainties, ensuring the stable operation of the dosing device is particularly critical. Therefore, this invention proposes a wastewater treatment chemical dosing device, which, by setting up backup pipelines, flushing pipelines, and cross pipelines, can ensure the stable operation of the dosing device, playing a positive role in ensuring stable dosing, stable operation of the wastewater treatment system, and stable effluent quality. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of the existing technology by providing a wastewater treatment agent dosing device that can continuously and stably deliver treatment agents during the wastewater treatment process, thereby ensuring the stable operation of the wastewater treatment system.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a wastewater treatment agent dosing device, comprising a first conveying unit and a second conveying unit; the first conveying unit and the second conveying unit have the same structure and are configured with one as a backup and the other as a standby unit; Both the first and second conveying units are equipped with a drug inlet branch pipe and a water inlet branch pipe, which are connected to their respective metering pumps. A Y-type filter is installed in front of each metering pump, and a parallel pipeline connected in parallel with the metering pump is installed between the front of the Y-type filter and the corresponding metering pump outlet. A safety valve is installed on the parallel pipeline. Each metering pump outlet is connected to a corresponding conveying branch pipe, and a pulse damper and a back pressure valve are installed sequentially on each conveying branch pipe. Each conveying branch pipe is connected to the drug outlet pipe. The first conveying unit and the second conveying unit are connected by conveying branch pipes on the rear side of their respective pulse dampers and the front side of their back pressure valves through a connecting pipe, and a connecting control valve is provided on the connecting pipe.

[0007] Furthermore, a drug inlet control valve is installed on the drug inlet branch pipe; a water inlet control valve is installed on the water inlet branch pipe.

[0008] Furthermore, a pulse damping control valve is installed between the pulse damper and the delivery branch pipe.

[0009] Furthermore, a control valve A is installed on the delivery branch pipe between the front side of the pulse damper and the outlet of the metering pump; a control valve B is installed on the delivery branch pipe between the rear side of the connecting pipe and the front side of the back pressure valve.

[0010] Furthermore, a pressure gauge is installed on the delivery branch pipe between the rear side of the pulse damper and the front side of the control valve B.

[0011] Furthermore, a control valve C is installed on the delivery branch pipe on the rear side of the back pressure valve.

[0012] Furthermore, it also includes a cabinet, which is equipped with a partition that divides the cabinet into a front cabinet and a rear cabinet. The rear cabinet includes a pipe arrangement box, and the bottom of the front cabinet is connected to the pipe arrangement box. Each metering pump is installed in the front cabinet. The bottom of the pipe arrangement box is provided with a water inlet, a medicine inlet, and a medicine outlet. The water inlet is connected to the water inlet pipe, and the water inlet pipe is connected to each water inlet branch pipe. The medicine inlet is connected to the medicine inlet pipe, and the medicine inlet pipe is connected to each medicine inlet branch pipe. The medicine outlet pipe is connected to the medicine outlet.

[0013] Furthermore, the drug inlet branch pipe and water inlet branch pipe in the pipeline layout box extend from the bottom of the partition to the front cabinet and are respectively connected to their respective metering pumps; the delivery branch pipes connected to the outlets of each metering pump pass directly through the openings in the partition to the pipeline layout box.

[0014] The beneficial effects of this utility model are as follows: The pipeline system of this utility model is set up with one backup and is equipped with a cleaning water pipeline and intersecting connecting pipelines; thus, this utility model can achieve stable and reliable operation of the device during use, which is of positive significance for ensuring the stable addition of the agent and the stable operation of the sewage treatment system. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model (front view); Figure 2 This is a schematic diagram of the internal structure of the front cabinet of this utility model; Figure 3 This is a schematic diagram of the overall structure of this utility model (rear view); Figure 4 This is a schematic diagram of the internal structure of the rear cabinet of this utility model; Figure 5 This is a pipeline connection layout diagram of this utility model.

[0016] The names corresponding to each mark in the diagram: 1. Cabinet; 11. Front Cabinet; 12. Partition; 13. Rear Cabinet; 131. Piping Box; 1311. Cable Interface; 1312. Water Inlet; 1313. Medicine Inlet; 1314. Medicine Outlet; 132. Electrical Control Box; 2. Control Panel; 3. First Metering Pump; 4. Second Metering Pump; 5. Water Inlet Pipe; 51. First Water Inlet Branch Pipe; 511. First Water Inlet Manual Valve; 512. First Water Inlet Electric Valve; 52. Second Water Inlet Branch Pipe; 521. Second Water Inlet Manual Valve; 522. Second Water Inlet Electric Valve; 6. Medicine Inlet Pipe; 61. First Medicine Inlet Branch Pipe; 611. First Medicine Inlet Manual Valve; 612. First Medicine Inlet Electric Valve; 62. Second Medicine Inlet Branch Pipe; 621. Second Medicine Inlet Manual Valve; 622. Second Medicine Inlet Electric Valve; 7. Delivery Pipe; 71. 711. First delivery branch pipe; 712. First Y-type filter; 713. First safety valve; 714. First manual valve; 715. First pulse damper; 716. Second manual valve; 717. Third manual valve; 718. First back pressure valve; 719. First electric valve; 7110. Fourth manual valve; 72. Second delivery branch pipe; 721. Second Y-type filter; 722. Second safety valve; 723. Fifth manual valve; 724. Second pressure gauge; 725. Second pulse damper; 726. Sixth manual valve; 727. Seventh manual valve; 728. Second back pressure valve; 729. Second electric valve; 7210. Eighth manual valve; 8. Connecting pipe; 81. First connecting manual valve; 82. Second connecting manual valve; 9. Discharge pipe. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0018] Embodiments of this utility model: In this embodiment, the reagent dosing device is used for metering and dosing of phosphorus removal reagent in the high-efficiency sedimentation tank during the operation of a wastewater treatment plant.

[0019] like Figure 1-5 As shown, the reagent dosing device of this utility model includes a cabinet 1, a control panel 2 on the cabinet 1, and a partition 12 in the cabinet 1, which divides the cabinet 1 into a front cabinet 11 and a rear cabinet 13, with the bottoms of the front cabinet 11 and the rear cabinet 13 connected. A mounting frame is provided in the front cabinet 11, and a first metering pump 3 and a second metering pump 4 are fixedly installed on the mounting frame. In one embodiment of this utility model, the first metering pump 3 and the second metering pump 4 are diaphragm metering pumps, and each is equipped with a stroke controller.

[0020] The rear cabinet 13 includes a lower pipe layout box 131 and an upper electrical control box 132. At the bottom of the pipe layout box 131, there are cable interface 1311, water inlet 1312, medicine inlet 1313 and medicine outlet 1314 respectively. The cable interface 1311 is connected to a cable, which is connected to the electrical control box 132 for power supply to the equipment. The electrical control box 132 is equipped with frequency converters, etc. (air switches, power switches, etc. are installed in the external cable line of the cable interface 1311).

[0021] In the pipe arrangement box 131, the water inlet 1312 is connected to the external water inlet pipe 5. After the water inlet pipe 5 extends into the pipe arrangement box 131, it is connected to the first water inlet branch pipe 51 and the second water inlet branch pipe 52 respectively. A first water inlet manual valve 511 is provided on the first water inlet branch pipe 51, and a first water inlet electric valve 512 is provided at the rear end of the first water inlet manual valve 511. A second water inlet manual valve 521 is provided on the second water inlet branch pipe 52, and a second water inlet electric valve 522 is provided at the rear end of the second water inlet manual valve 521.

[0022] In the pipe arrangement box 131, the inlet 1313 is connected to the external inlet pipe 6 (the external inlet pipe 6 is connected to the drug tank, which contains a drug solution of a certain concentration, such as 20% PAC solution). After the inlet pipe 6 extends into the pipe arrangement box 131, it is connected to the first inlet branch pipe 61 and the second inlet branch pipe 62 respectively. A first manual inlet valve 611 is provided on the first inlet branch pipe 61, and a first electric inlet valve 612 is provided at the rear end of the first manual inlet valve 611. A second manual inlet valve 621 is provided on the second inlet branch pipe 62, and a second electric inlet valve 622 is provided at the rear end of the second manual inlet valve 621.

[0023] The first water inlet branch pipe 51 and the first medicine inlet branch pipe 61 are connected to the first delivery branch pipe 71 in the delivery pipeline 7. The first delivery branch pipe 71 extends from below the partition 12 in the pipeline arrangement box 131 to the front cabinet 11 and is connected to the inlet of the first metering pump 3. A first Y-type filter 711 is provided at the front end of the inlet of the first metering pump 3. The first delivery branch pipe 71, which is connected to the outlet of the first metering pump 3, passes through the partition 12 and returns to the pipeline arrangement box 131. In the pipeline arrangement box 131, a first parallel pipeline is provided between the front end of the first Y-type filter 711 and the rear end of the outlet of the first metering pump 3. A first safety valve 712 is installed on the first parallel pipeline.

[0024] A first manual valve 713 is installed downstream of the first parallel pipeline. A first buffer pipeline is installed downstream of the first manual valve 713. A second manual valve 716 is installed on the first buffer pipeline. A first pulse damper 715 (with a built-in pressure gauge) is installed downstream of the second manual valve 716. A first pressure gauge 714 is installed downstream of the first buffer pipeline. A connecting pipe 8 is installed downstream of the first pressure gauge 714. A third manual valve 717 is installed downstream of the connecting pipe 8. A first back pressure valve 718 is provided on the rear side of 717, a first electric valve 719 is provided on the rear side of the first back pressure valve 718, and a fourth manual valve 7110 is provided on the rear side of the first electric valve 719. The fourth manual valve 7110 is connected to the drug outlet pipe 9 on the rear side. The first Y-type filter 711, the first metering pump 3, the first manual valve 713, the first pressure gauge 714, the third manual valve 717, the first back pressure valve 718, the first electric valve 719, and the fourth manual valve 7110 are sequentially arranged on the first delivery branch pipe 71.

[0025] The second water inlet branch pipe 52 and the second medicine inlet branch pipe 62 are connected to the second delivery branch pipe 72 in the delivery pipeline 7. The second delivery branch pipe 72 extends from below the partition 12 in the pipeline arrangement box 131 to the front cabinet 11 and is connected to the inlet of the second metering pump 4. A second Y-type filter 721 is provided at the front end of the inlet of the second metering pump 4. The second delivery branch pipe 72, which is connected to the outlet of the second metering pump 4, passes through the partition 12 and returns to the pipeline arrangement box 131. In the pipeline arrangement box 131, a second parallel pipeline is provided between the front end of the second Y-type filter 721 and the rear end of the outlet of the second metering pump 4. A second safety valve 722 is installed on the second parallel pipeline.

[0026] A fifth manual valve 723 is installed downstream of the second parallel pipeline. A second buffer pipeline is installed downstream of the fifth manual valve 723. A sixth manual valve 726 is installed on the second buffer pipeline. A second pulse damper 725 (with a built-in pressure gauge) is installed downstream of the sixth manual valve 726. A second pressure gauge 724 is installed downstream of the second buffer pipeline. A connecting pipe 8 is installed downstream of the second pressure gauge 724. A seventh manual valve 727 is installed downstream of the connecting pipe 8. A second back pressure valve 728 is provided at the rear end of 27, a second electric valve 729 is provided behind the second back pressure valve 728, and an eighth manual valve 7210 is provided behind the second electric valve 729. The eighth manual valve 7210 is connected to the drug outlet pipe 9 at the rear. The second Y-type filter 721, the second metering pump 4, the fifth manual valve 723, the second pressure gauge 724, the seventh manual valve 727, the second back pressure valve 728, the second electric valve 729, and the eighth manual valve 7210 are sequentially arranged on the second delivery branch pipe 72.

[0027] The connecting pipe 8 behind the first pressure gauge 714 is connected to the connecting pipe 8 behind the second pressure gauge 724. The connecting pipe 8 is redundantly equipped with a first connecting manual valve 81 and a second connecting manual valve 82. The drug outlet pipe 9 behind the fourth manual valve 7110 and the drug outlet pipe 9 behind the eighth manual valve 7210 converge and are led out through the drug outlet 1314 and transported to the inlet of the high-efficiency sedimentation tank.

[0028] The principle of this utility model is as follows: In the process of using this utility model, the first drug inlet pipe 6, the second drug inlet pipe 6, the first water inlet pipe 5, the second water inlet pipe 5, the first delivery branch pipe 71 and the second delivery branch pipe 72, the first metering pump 3 and the second metering pump 4 are all used in a standby manner; and can be reasonably selected during use.

[0029] Taking the first inlet pipe 6 as an example, the liquid medicine in the medicine tank is drawn and transported by the first metering pump 3. The first Y-type filter 711 filters the liquid medicine to prevent the pump body from clogging. The safety valve connected in parallel outside the first metering pump 3 plays the role of overpressure protection, which can effectively ensure the safe operation of the pump body. The liquid medicine after passing through the first metering pump 3 can be transported to the outlet pipe 9 through the first manual valve 713 (normally open), the first back pressure valve 718, the first electric valve 719, and the fourth manual valve 7110. During the process, the second manual valve 716 is opened, and the pressure in the delivery pipe 7 can be adjusted through the first pulse damper 715 to ensure the stability of the liquid medicine delivery flow. It should be noted that the pressure of the first safety valve 712 is set to be greater than that of the first back pressure valve 718. For example, if the pressure of the first safety valve 712 is set to 0.2 MPa, then the pressure of the first back pressure valve 718 should be less than 0.2 MPa. If it is set to 0.1 MPa, the stable delivery of the liquid medicine can be ensured.

[0030] The operation of the second inlet pipe 6 is the same as that of the first inlet pipe 6, so it will not be described again. During the inspection, maintenance and replacement of pipeline equipment, the pipeline can be switched between the first inlet pipe 6 and the second inlet pipe 6 by controlling the opening and closing of the valve.

[0031] In this utility model, an inlet pipe 5 is also provided, which can be used to flush out pipe blockages. For example, if the first delivery branch pipe 71 is blocked, the second delivery branch pipe 72 will operate, and the first metering pump 3 will draw cleaning water to flush the first delivery branch pipe 71. During the process, the flushing water mixes with the chemical solution in the second delivery branch pipe 72 and is discharged from the chemical outlet pipe 9. Since the concentration and flow rate of the chemical solution in the first delivery branch pipe 71 remain unchanged, even if it mixes with the cleaning water in the first delivery branch pipe 71, it only changes the concentration of the chemical and does not affect the total amount. For example, if a small amount of cleaning water is mixed into the inlet water of the denitrification tank or the high-efficiency sedimentation tank, it will not affect the operation of the tank. Conversely, if the second delivery branch pipe 72 is blocked, the first delivery branch pipe 71 will operate, and the process is similar, so it will not be described in detail.

[0032] In this utility model, a connecting pipe 8 is also provided. If the second metering pump 4, the first electric valve 719, the first back pressure valve 718 and other components are under maintenance at the same time, the first connecting manual valve 81 and the second connecting manual valve 82 on the connecting pipe 8 are opened, and the third manual valve 717 and the fifth manual valve 723 are closed. The medicine liquid drawn by the first metering pump 3 can be discharged through the second delivery branch pipe 72, which further ensures the stable operation of the device. Since the connecting pipe 8 is a spare pipe and the usage is special, the first connecting manual valve 81 and the second connecting manual valve 82 are redundantly provided on the connecting pipe 8 to avoid unnecessary fluctuations in the flow rate of the medicine liquid caused by the connection of the connecting pipe 8 due to malfunction.

Claims

1. A wastewater treatment agent dosing device, characterized in that: It includes a first conveying unit and a second conveying unit; the first conveying unit and the second conveying unit have the same structure and are configured with one as a backup and the other as a standby unit; Both the first and second conveying units are equipped with a drug inlet branch pipe and a water inlet branch pipe, which are connected to their respective metering pumps. A Y-type filter is installed in front of each metering pump, and a parallel pipeline connected in parallel with the metering pump is installed between the front of the Y-type filter and the corresponding metering pump outlet. A safety valve is installed on the parallel pipeline. Each metering pump outlet is connected to a corresponding conveying branch pipe, and a pulse damper and a back pressure valve are installed sequentially on each conveying branch pipe. Each conveying branch pipe is connected to the drug outlet pipe. The first conveying unit and the second conveying unit are connected by conveying branch pipes on the rear side of their respective pulse dampers and the front side of their back pressure valves through a connecting pipe, and a connecting control valve is provided on the connecting pipe.

2. The sewage treatment agent dosing device according to claim 1, characterized in that: The drug inlet branch pipe is equipped with a drug inlet control valve; the water inlet branch pipe is equipped with a water inlet control valve.

3. The sewage treatment agent dosing device according to claim 1, characterized in that: A pulse damping control valve is installed between the pulse damper and the delivery branch pipe.

4. The sewage treatment agent dosing device according to claim 1, characterized in that: A control valve A is installed on the delivery branch pipe between the front side of the pulse damper and the outlet of the metering pump; a control valve B is installed on the delivery branch pipe between the rear side of the connecting pipe and the front side of the back pressure valve.

5. The sewage treatment agent dosing device according to claim 4, characterized in that: A pressure gauge is installed on the delivery branch pipe between the rear side of the pulse damper and the front side of the control valve B.

6. The sewage treatment agent dosing device according to claim 4, characterized in that: A control valve C is installed on the delivery branch pipe behind the back pressure valve.

7. The sewage treatment agent dosing device according to any one of claims 1-6, characterized in that: It also includes a cabinet, which is equipped with a partition that divides the cabinet into a front cabinet and a rear cabinet. The rear cabinet includes a pipe arrangement box, and the bottom of the front cabinet is connected to the pipe arrangement box. Each metering pump is installed in the front cabinet. The bottom of the pipe arrangement box is provided with a water inlet, a medicine inlet, and a medicine outlet. The water inlet is connected to the water inlet pipe, which is connected to each water inlet branch pipe. The medicine inlet is connected to the medicine inlet pipe, which is connected to each medicine inlet branch pipe. The medicine outlet pipe is connected to the medicine outlet.

8. The sewage treatment agent dosing device according to claim 7, characterized in that: The drug inlet branch pipe and water inlet branch pipe in the pipeline layout box extend from the bottom of the partition to the front cabinet and are connected to their respective metering pumps; the delivery branch pipes connected to the outlets of each metering pump pass directly through the openings in the partition to the pipeline layout box.

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