One-to-many pressure dosing device for sewage treatment

Abstract

The utility model relates to the technical field of sewage treatment, and provides a one-to-many pressure dosing device for sewage treatment, which comprises a controller and a pressure dosing module, the pressure medicine adding module comprises a pressure medicine storage tank, a medicine adding assembly, a pressurizing assembly and a flow measuring assembly; the chemical adding assembly comprises a plurality of chemical adding branch pipes connected to the pressure chemical storage tank, and the plurality of chemical adding branch pipes are respectively connected with a plurality of sewage treatment pools; a dosing valve is mounted on the dosing branch pipe and is electrically connected with the controller; the pressurizing assembly comprises an air inlet pipe connected to the pressure medicine storage tank, and the end, away from the pressure medicine storage tank, of the air inlet pipe is connected with an air source. And the pressurizing assembly is used for inflating and pressurizing the pressure medicine storage tank so as to stably output the medicine liquid through the medicine adding branch pipe. The device has the effects that dosing operation can be performed on multiple dosing points of the sewage treatment tank, and dosing flow control is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of sewage treatment, in particular to a one-to-many pressure dosing device for sewage treatment. BACKGROUND

[0002] In the sewage treatment process, biological method combined with chemical agent dosing method is a commonly used treatment method. At present, the dosing mode of each dosing point of the sewage treatment tank of the sewage treatment plant mainly adopts one-to-one dosing mode.

[0003] The one-to-one dosing mode usually adopts a single set of diaphragm pump or metering pump configured in the dosing tank to dose one dosing point. When the dosing points are more, the number of pump bodies and pipelines also increases, the occupied area also increases, and the overall cost is relatively high. Moreover, the pipelines adopt contact flow meters to measure the flow, and the measurement accuracy is reduced due to the corrosion and scaling of the agent, and the on-site maintenance is difficult. CONTENT OF THE UTILITY MODEL

[0004] In order to facilitate dosing at multiple dosing points of sewage treatment tanks at the same time, the present application provides a one-to-many pressure dosing device for sewage treatment.

[0005] The one-to-many pressure dosing device for sewage treatment provided by the present application adopts the following technical scheme:

[0006] A one-to-many pressure dosing device for sewage treatment, comprising a controller and a pressure dosing module;

[0007] The pressure dosing module comprises a pressure storage tank, a dosing assembly, a pressurizing assembly and a medicine inlet assembly;

[0008] The dosing assembly comprises a plurality of dosing branch pipes connected to the pressure storage tank, and the plurality of dosing branch pipes are respectively connected to a plurality of sewage treatment tanks. A dosing valve is installed on the dosing branch pipe, and the dosing valve is electrically connected to the controller;

[0009] The pressurizing assembly comprises an air inlet pipe connected to the pressure storage tank, and the air inlet pipe is connected to a gas source at an end away from the pressure storage tank. The pressurizing assembly is used to inflate and pressurize the pressure storage tank, so as to stably output the medicine liquid through the dosing branch pipe;

[0010] The medicine inlet assembly comprises a medicine inlet pipe connected to the pressure storage tank, and the medicine inlet pipe is connected to a dosing tank. A medicine inlet pump is installed on the medicine inlet pipe.

[0011] By adopting the technical scheme, when it is necessary to perform dosing operation to the corresponding sewage treatment tank, the pressure storage tank is pressurized by the gas source through the gas inlet pipe, and the dosing valve on the corresponding dosing branch pipe connected to the corresponding sewage treatment tank is opened under the control of the controller, so that the liquid medicine in the pressure storage tank flows into the corresponding sewage treatment tank under the action of pressure. Compared with the traditional one-to-one dosing mode, the pressure storage tank can complete the dosing operation to different sewage treatment tanks by switching the corresponding dosing branch pipe, realize one-to-many dosing, and effectively reduce the overall operation cost of the dosing device. By arranging the medicine inlet assembly, the liquid medicine in the medicine preparation tank can be conveniently input into the pressure storage tank through the medicine inlet pipe and the medicine inlet pump, and automatic replenishment of the liquid medicine is realized.

[0012] Preferably, a pressure regulating valve is arranged on the gas inlet pipe; a first pressure gauge is arranged on the pressure storage tank, and the pressure regulating valve and the first pressure gauge are electrically connected to the controller.

[0013] By adopting the technical scheme, the amount of gas entering the pressure storage tank is adjusted by the pressure regulating valve, and then the pressure value in the pressure storage tank is adjusted, and the change of the pressure value in the pressure storage tank is fed back in real time by the first pressure gauge, so that accurate adjustment of the pressure in the pressure storage tank can be realized according to actual dosing needs.

[0014] Preferably, a second pressure gauge is arranged on each dosing branch pipe, the second pressure gauge is used to obtain the static pressure value in the corresponding dosing branch pipe, and the second pressure gauge is electrically connected to the controller.

[0015] By adopting the technical scheme, the corresponding relationship between the flow value of the dosing branch pipe and the static pressure value of the dosing branch pipe is established through the calibration process, the static pressure value corresponding to the set flow of the dosing branch pipe is determined, so that the actual flow of the dosing branch pipe can be dynamically adjusted according to the actual dosing flow needs by adjusting the opening degree of the dosing valve, and the static pressure value of the dosing branch pipe is used as feedback.

[0016] Preferably, a liquid level meter is arranged on the pressure storage tank, and the liquid level meter and the medicine inlet pump are electrically connected to the controller.

[0017] By adopting the technical scheme, the liquid level meter is used to feed back the liquid level in the pressure storage tank in real time, so that the controller can monitor the liquid medicine in the pressure storage tank in real time, and when the liquid medicine in the pressure storage tank is insufficient, the liquid medicine in the medicine preparation tank can be pumped into the pressure storage tank by the medicine inlet pump, and automatic replenishment of the liquid medicine in the pressure storage tank is realized.

[0018] Preferably, an overflow pipe is communicated with the top of the pressure storage tank, the overflow pipe is communicated with the medicine preparation tank, and an overflow valve is arranged on the overflow pipe.

[0019] By adopting the technical scheme, when the liquid level of the medicine in the pressure medicine storage tank is too high, the excess medicine can be discharged into the medicine preparation pool through the overflow pipe and the overflow valve.

[0020] Preferably, a flow measurement assembly is installed on the medicine adding branch pipe, the flow measurement assembly comprises a standard constant volume cavity, a measurement inlet pipe and a measurement outlet pipe are installed on the top of the standard constant volume cavity, the measurement inlet pipe and the measurement outlet pipe are respectively provided with an inlet water flow indicating switch and an outlet water flow indicating switch near one end of the standard constant volume cavity; an emptying pipe is communicated with the bottom of the standard constant volume cavity, and an emptying valve is installed on the emptying pipe; the measurement inlet pipe is communicated with the medicine adding branch pipe through a switching valve; the inlet water flow indicating switch, the outlet water flow indicating switch, the emptying valve and the switching valve are electrically connected with the controller.

[0021] By adopting the technical scheme, when the actual flow of the medicine adding branch pipe is checked, the switching valve is switched to communicate the measurement inlet pipe with the medicine adding branch pipe, when the medicine flows through the inlet water flow indicating switch of the measurement inlet pipe, the controller obtains a timing start signal and starts timing; when the medicine fills the standard constant volume cavity and flows through the outlet water flow indicating switch sensor of the measurement outlet pipe, the controller obtains a timing termination signal and stops timing, so as to obtain the filling time of the medicine in the standard cavity, and then the actual flow value of the medicine adding branch pipe is calculated according to the volume value of the standard constant volume cavity and the filling time, so as to check and measure the actual flow of the medicine adding branch pipe, so as to judge whether the corresponding medicine adding branch pipe is blocked or leaked.

[0022] Preferably, the measurement outlet pipe and the emptying pipe are communicated with the corresponding sewage treatment pool.

[0023] By adopting the technical scheme, the medicine discharged from the measurement outlet pipe and the emptying pipe can flow into the sewage treatment pool, which is beneficial to reduce the waste of medicine.

[0024] Preferably, an air inlet valve is installed on the air inlet pipe, and the air inlet valve is electrically connected with the controller.

[0025] By adopting the technical scheme, the air inlet valve can be used to control the opening and closing of the air inlet pipe according to the actual operation needs.

[0026] In summary, the present application has at least one of the following beneficial technical effects:

[0027] 1. The pressure medicine adding device of the present application can realize precise medicine adding operation for different sewage treatment pools by adjusting the opening degree of the medicine adding valve on different medicine adding branch pipes, so as to avoid under-dosing or over-dosing of the medicine, and reduce the medicine adding cost of sewage treatment under the premise of ensuring standard.

[0028] 2. By setting a second pressure gauge on the dosing branch pipe, and making the second pressure gauge and the dosing valve both electrically connected with the controller; at the same time, by establishing the corresponding relationship between the dosing branch pipe flow value and the dosing branch pipe static pressure value through the calibration process, the static pressure value corresponding to the set flow of the dosing branch pipe is determined; in actual operation, the actual dosing flow can be adjusted according to the actual dosing flow requirement, and the static pressure value of the dosing branch pipe is used as feedback to realize dynamic adjustment of the actual flow of the dosing branch pipe.

[0029] 3. By setting a flow measurement assembly on the dosing pipe, the flow of the dosing branch pipe is measured by the flow measurement assembly to facilitate the judgment of whether the dosing branch pipe has the phenomenon of pipe blockage or pipe leakage. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a schematic diagram of a one-to-many pressure dosing device according to an embodiment of the present application.

[0031] Figure 2 is a schematic diagram of a dosing branch pipe and a flow measurement assembly according to an embodiment of the present application.

[0032] MARKED FOR EXPLANATION:

[0033] 1, pressure storage tank; 11, liquid level meter; 12, first pressure gauge; 13, overflow pipe; 131, overflow valve; 2, dosing branch pipe; 20, switching valve; 21, dosing valve; 22, second pressure gauge; 3, air inlet pipe; 31, pressure regulating valve; 32, air inlet valve; 4, dosing pipe; 41, dosing pump; 42, dosing valve; 5, flow measurement assembly; 50, standard constant volume cavity; 51, measuring inlet pipe; 511, inlet water flow indication switch; 52, measuring outlet pipe; 521, outlet water flow indication switch; 53, emptying pipe; 531, emptying valve. DETAILED DESCRIPTION

[0034] The following will be described in detail in combination with the accompanying drawings Figures 1-2 The present application is further described in detail.

[0035] An embodiment of the present application discloses a one-to-many pressure dosing device for sewage treatment, referring to Figure 1 , comprising a controller and a pressure dosing module; the pressure dosing module comprises a pressure storage tank 1, a dosing assembly, and a pressurizing assembly; the dosing assembly comprises a plurality of dosing branch pipes 2, one end of each dosing branch pipe 2 is connected with the pressure storage tank 1, the other end of each dosing branch pipe 2 is connected with a dosing point of a sewage treatment tank, and each dosing branch pipe 2 is provided with a dosing valve 21; the pressurizing assembly comprises an air inlet pipe 3, the air inlet pipe 3 is connected with the top of the pressure storage tank 1, and the end of the air inlet pipe 3 away from the pressure storage tank 1 is connected with an air source, specifically, the air source is an air compressor; the pressurizing assembly is used for inflating and pressurizing the pressure storage tank 1 by the air source, so as to stably output the liquid medicine through the corresponding dosing branch pipe 2.

[0036] When the dosing operation is performed on each sewage treatment tank, the controller opens the dosing valve 21 on the corresponding dosing branch pipe 2, and the air source pressurizes the pressure storage tank 1 through the air inlet pipe 3, so that the liquid medicine in the pressure storage tank 1 is stably output to the corresponding sewage treatment tank through the dosing branch pipe 2, realizing the one-to-many dosing operation of the pressure storage tank 1 to different sewage treatment tanks.

[0037] The pressure dosing module further comprises a medicine inlet assembly, which comprises a medicine inlet pipe 4 connected to the pressure storage tank 1 at one end and connected to a medicine preparation tank at the other end, and a medicine inlet valve 42 and a medicine inlet pump 41 installed on the medicine inlet pipe 4. Specifically, the medicine inlet pump 41 is a self-priming pump, and the medicine inlet valve 42 is an electric ball valve. The medicine inlet pump 41 and the medicine inlet valve 42 are electrically connected to the controller.

[0038] A liquid level meter 11 is further installed on the pressure storage tank 1, which is used to detect the liquid level of the liquid medicine in the pressure storage tank 1. In this embodiment, the liquid level meter 11 is a capacitive liquid level meter 11, and the liquid level meter 11 is electrically connected to the controller. When the liquid level meter 11 detects that the liquid level of the liquid medicine in the pressure storage tank 1 is too low, the controller can open the medicine inlet valve 42 and pump the liquid medicine in the medicine preparation tank into the pressure storage tank 1 through the medicine inlet pump 41, realizing automatic replenishment of the liquid medicine in the pressure storage tank 1. At the same time, the dosing amount can be calculated by the data measured by the liquid level meter 11 after completing a single dosing operation.

[0039] The pressure storage tank 1 is further connected to an overflow pipe 13, one end of the overflow pipe 13 away from the pressure storage tank 1 is connected to the medicine preparation tank, and an overflow valve 131 is installed on the overflow pipe 13. The overflow valve 131 is an on-off type electric ball valve. When the liquid level of the liquid medicine in the pressure storage tank 1 is too high, the overflow valve 131 can be opened to make the excess liquid medicine in the pressure storage tank 1 flow back to the medicine preparation tank through the overflow pipe 13.

[0040] An air inlet valve 32 is installed on the air inlet pipe 3. Specifically, the air inlet valve 32 is an electric ball valve, and the air inlet valve 32 is electrically connected to the controller, so that the controller can control the opening and closing of the air inlet pipe 3 through the air inlet valve 32 according to the needs.

[0041] A pressure regulating valve 31 is further installed on the air inlet pipe 3, and a first pressure gauge 12 is installed on the pressure storage tank 1. Specifically, the pressure regulating valve 31 is a proportional valve, and the first pressure gauge 12 is an electronic pressure gauge. The pressure regulating valve 31 and the first pressure gauge 12 are electrically connected to the controller, so that the controller can adjust the pressure value in the pressure storage tank 1 through the pressure regulating valve 31 according to the needs of the overall operation of the device, and the internal pressure value of the pressure storage tank 1 is fed back in real time through the first pressure gauge 12.

[0042] In the embodiment, the dosing valve 21 is a stepless adjustment electric ball valve; the second pressure gauges 22 are installed on the dosing branch pipes 2, and the second pressure gauges 22 are electronic pressure gauges. The second pressure gauges 22 are used to obtain the static pressure values corresponding to the interiors of the dosing branch pipes 2, and the second pressure gauges 22 are electrically connected with the controller. The corresponding relationship between the flow values of the dosing branch pipes 2 and the static pressure values of the dosing branch pipes 2 is established by performing a calibration process, the static pressure value of the dosing branch pipe 2 corresponding to the set flow of the dosing branch pipe 2 is determined, and according to the actual dosing flow requirement, the opening degree of the dosing valve 21 is adjusted by the controller, the static pressure value of the dosing branch pipe 2 is taken as the feedback, and the dynamic adjustment of the actual flow of the dosing branch pipe 2 is realized.

[0043] Specifically, the relationship between the total pressure of the different pressure storage tanks 1 and the maximum flow of each dosing branch pipe 2 is established by respectively measuring the flow upper limit of a plurality of parallel dosing branch pipes 2; the optimal total pressure set value of the pressure storage tank 1 is obtained according to the relationship between the total pressure of the different pressure storage tanks 1 and the maximum flow of each dosing branch pipe 2, the static pressure of each dosing branch pipe 2 is changed under the optimal total pressure set value of the pressure storage tank 1, the dosing process is performed under different static pressures, and the corresponding data of the static pressure P and the flow Q of each dosing branch pipe 2 are obtained; based on the corresponding data of the static pressure P and the flow Q of each dosing branch pipe 2, the formula P=MQ²+N is respectively used for fitting to obtain the fitting coefficients M, N and the correlation coefficient R² of the fitting formula of each dosing branch pipe 2, when the correlation coefficient R² is greater than the target value 0.98, it is indicated that the correlation coefficient of the flow and the static pressure of the dosing branch pipe 2 meets the operation requirement; according to the fitting coefficients of each dosing branch pipe 2, the target flow value required by each dosing branch pipe 2 is input, and the target static pressure value corresponding to the target flow of each dosing branch pipe 2 is calculated by the controller; in actual operation, based on the target static pressure value of each dosing branch pipe 2, the opening degree of the dosing valve 21 on each dosing branch pipe 2 is controlled by the controller, the static pressure value of the dosing branch pipe 2 is taken as the feedback, and the flow of each dosing branch pipe 2 is adjusted.

[0044] Reference Figure 1 and Figure 2The flow measurement assembly 5 is arranged at one end of the dosing branch pipe 2 close to the corresponding sewage treatment tank, and is used to check the real-time flow of the dosing branch pipe 2. The flow measurement assembly 5 comprises a standard constant volume cavity 50, and the top end of the standard constant volume cavity 50 is respectively communicated with a measuring water inlet pipe 51 and a measuring water outlet pipe 52. The end of the measuring water inlet pipe 51 away from the standard constant volume cavity 50 is communicated with the dosing branch pipe 2 through a switching valve 20. Specifically, the switching valve 20 is an electric three-way valve. The end of the measuring water outlet pipe 52 away from the standard constant volume cavity 50 is communicated with the sewage treatment tank. The end of the measuring water inlet pipe 51 and the end of the measuring water outlet pipe 52 close to the standard constant volume cavity 50 are respectively provided with a water inlet flow indication switch 511 and a water outlet flow indication switch 521. The water inlet flow indication switch 511 and the water outlet flow indication switch 521 are both existing non-contact water flow switches. The water inlet flow indication switch 511, the water outlet flow indication switch 521 and the switching valve 20 are all communicated with a controller. The water inlet flow indication switch 511 and the water outlet flow indication switch 521 are respectively used to sense the water flow signals of the measuring water inlet pipe 51 and the measuring water outlet pipe 52 and feed back to the controller.

[0045] When the flow of the dosing branch pipe 2 is checked by the flow measurement assembly 5, the controller controls the switching valve 20 to switch to the communication between the measuring water inlet pipe 51 and the dosing branch pipe 2. When the liquid medicine in the dosing branch pipe 2 flows through the water inlet flow indication switch 511 of the measuring water inlet pipe 51, the controller obtains a timing start signal and starts the timer. When the liquid medicine fills the standard constant volume cavity 50 and flows through the water outlet flow indication switch 521 of the measuring water outlet pipe 52, the controller obtains a timing termination signal and stops the timer. In this way, the filling time of the liquid medicine in the standard cavity is obtained, and the actual flow value of the dosing branch pipe 2 is calculated according to the volume value of the standard constant volume cavity 50 and the filling time, so as to check and determine the actual flow of the dosing branch pipe 2. In order to compare the actual flow value with the flow value of the initial state of the dosing branch pipe 2, it is determined whether the dosing branch pipe 2 appears the phenomenon of pipe blockage or pipe leakage.

[0046] The bottom end of the standard constant volume cavity 50 is vertically downward communicated with an emptying pipe 53, and the emptying pipe 53 is provided with an emptying valve 531. The emptying valve 531 is electrically connected with the controller. After the real-time flow of the dosing branch pipe 2 is determined by the flow measurement assembly 5, the emptying valve 531 is controlled to open the emptying pipe 53 by the controller, so that the liquid medicine in the standard constant volume cavity 50 is discharged out of the standard constant volume cavity 50 through the emptying pipe 53.

[0047] The measuring water outlet pipe 52 and the emptying pipe 53 are both communicated with the sewage treatment tank, so that the liquid medicine discharged from the measuring water outlet pipe 52 and the emptying pipe 53 can flow into the sewage treatment tank, which is beneficial to reduce the waste of liquid medicine.

[0048] The implementation principle of the embodiment of the application is that when the dosing operation is performed on each sewage treatment tank dosing point, the controller opens the dosing valve 21 of the corresponding dosing branch pipe 2, and the pressure storage tank 1 is inflated and pressurized by the gas source, so that the liquid medicine in the pressure storage tank 1 is pumped into the corresponding sewage treatment tank through the corresponding dosing pipe, to complete the dosing operation, and one-to-many dosing can be realized, effectively reducing the overall operation cost of sewage treatment.

[0049] The above are preferred embodiments of the application, and do not limit the protection scope of the application, so: any equivalent changes made according to the structure, shape, principle of the application should be covered within the protection scope of the application.

Claims

1. A pair of multi-pressure dosing devices for sewage treatment, characterized by: The controller and the pressure dosing module are included; The pressure dosing module comprises a pressure medicine storage tank (1), a dosing assembly, a pressurizing assembly and a medicine feeding assembly; The dosing assembly comprises a plurality of dosing branch pipes (2) connected to the pressure medicine storage tank (1), and the dosing branch pipes (2) are respectively connected to a plurality of sewage treatment tanks; a dosing valve (21) is installed on the dosing branch pipe (2), and the dosing valve (21) is electrically connected to the controller; The pressurizing assembly comprises an air inlet pipe (3) connected to the pressure medicine storage tank (1), and one end of the air inlet pipe (3) away from the pressure medicine storage tank (1) is connected to an air source; the pressurizing assembly is used for inflating and pressurizing the pressure medicine storage tank (1) to stably output the liquid medicine through the dosing branch pipe (2); The medicine feeding assembly comprises a medicine feeding pipe (4) connected to the pressure medicine storage tank (1), and the medicine feeding pipe (4) is connected to a medicine preparation tank; a medicine feeding pump (41) is installed on the medicine feeding pipe (4).

2. A one-to-many pressure dosing device for wastewater treatment according to claim 1, characterized in that: A second pressure gauge (22) is installed on the dosing branch pipe (2), and the second pressure gauge (22) is used for obtaining the internal static pressure value of the dosing branch pipe (2); the second pressure gauge (22) is electrically connected to the controller.

3. A one-to-many pressure dosing device for wastewater treatment according to claim 1, characterized in that: A liquid level meter (11) is installed on the pressure medicine storage tank (1), and the liquid level meter (11) and the medicine feeding pump (41) are electrically connected to the controller.

4. A one-to-many pressure dosing device for wastewater treatment according to claim 3, wherein: An overflow pipe (13) is communicated with the top of the pressure medicine storage tank (1), the overflow pipe (13) is communicated with the medicine preparation tank, and an overflow valve (131) is installed on the overflow pipe (13).

5. A one-to-many pressure dosing device for wastewater treatment according to claim 1, characterized in that: A flow measurement assembly (5) is installed on the dosing branch pipe (2), and the flow measurement assembly (5) comprises a standard constant volume cavity (50), a measurement inlet pipe (51) and a measurement outlet pipe (52) are installed on the top of the standard constant volume cavity (50), inlet flow indication switches (511) and outlet flow indication switches (521) are respectively installed on the ends of the measurement inlet pipe (51) and the measurement outlet pipe (52) close to the standard constant volume cavity (50); an emptying pipe (53) is communicated with the bottom of the standard constant volume cavity (50), and an emptying valve (531) is installed on the emptying pipe (53); the measurement inlet pipe (51) is communicated with the dosing branch pipe (2) through a switching valve (20); the inlet flow indication switches (511), the outlet flow indication switches (521), the emptying valve (531) and the switching valve (20) are electrically connected to the controller.

6. A one-to-many pressure dosing device for wastewater treatment according to claim 5, wherein: The measurement outlet pipe (52) and the emptying pipe (53) are communicated with corresponding sewage treatment tanks.

7. A one-to-many pressure dosing device for wastewater treatment according to claim 2, wherein: An air inlet valve (32) is installed on the air inlet pipe (3), and the air inlet valve (32) is electrically connected to the controller.

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