A dosing system and dosing plant

Abstract

The utility model belongs to the technical field of environmental protection equipment, specifically relates to a dosing system and dosing workshop, the utility model discloses: liquid inlet main pipe, a plurality of groups of dosing unit, the liquid inlet of each group of dosing unit communicates with liquid inlet main pipe, liquid outlet main pipe, it communicates with the liquid outlet of each group of dosing unit, and first control valve is established between every liquid outlet, and liquid outlet main pipe is equipped with at least two liquid discharge ports, and the liquid discharge port is equipped with second control valve, and dosing unit includes: dosing pump, dosing pump liquid inlet line, one end communicates with liquid inlet main pipe, and the other end communicates with dosing pump, dosing pump liquid outlet line, one end communicates with liquid outlet main pipe, and the other end communicates with dosing pump. The utility model is used to solve the technical problem that the existing dosing system is not applicable to large -scale sewage treatment plant.

Description

Technical Field

[0001] This utility model belongs to the field of environmental protection equipment technology, specifically relating to a dosing system and a dosing workshop. Background Technology

[0002] In the wastewater treatment industry, it is often necessary to add chemical agents to wastewater to achieve pH adjustment or flocculation. Existing dosing systems typically include mobile dosing systems, which are moved to different wastewater tanks to administer chemicals, or a separate dosing system for each wastewater tank.

[0003] Among them, mobile dosing systems are more suitable for manual dosing and are not suitable for automated dosing; while independent dosing systems can be connected to the control room through control lines to achieve automated dosing, dosing systems installed in different locations are not conducive to daily maintenance. This includes replenishing the dosing tanks and repairing the dosing pumps, which require maintenance personnel to travel to different locations. In addition, different installation locations will result in excessively long and scattered wiring.

[0004] Large-scale wastewater treatment plants typically have multiple workshops, each containing multiple wastewater treatment ponds. Therefore, separate dosing systems are not suitable for such large-scale wastewater treatment plants. Utility Model Content

[0005] This invention provides a dosing system and a dosing workshop to solve the technical problem that existing dosing systems are not suitable for large-scale wastewater treatment plants. This utility model includes: a liquid inlet manifold; Several sets of dosing units, with the inlet of each dosing unit connected to the main inlet pipe; The main outlet pipe is connected to the outlet of each of the dosing units, and a first control valve is provided between each outlet. The main outlet pipe is provided with at least two drain ports, and each drain port is provided with a second control valve. The dosing unit includes: Dosing pump; The dosing pump inlet pipeline has one end connected to the main inlet pipe and the other end connected to the dosing pump; The liquid outlet pipeline of the dosing pump is connected at one end to the main liquid outlet pipeline and at the other end to the dosing pump.

[0006] In this invention, several groups of dosing units can work independently or collaboratively, and the conveying direction of each dosing unit can be adjusted by opening and closing the first control valve.

[0007] Further: the inlet pipeline of the dosing pump includes: Main inlet pipeline; The third control valve is located at the front end of the main liquid inlet pipeline; A filter is located at the rear end of the main inlet pipe; The first venting pipeline is located between the third control valve and the filter, and a fourth control valve is provided on the first venting pipeline; The dosing pump outlet pipeline includes: Main outlet pipe; A pressure gauge is installed at the front end of the main liquid outlet pipeline; The fifth control valve is located at the rear end of the main liquid outlet pipeline; The second and third venting lines are sequentially located between the pressure gauge and the fifth control valve. The second venting pipeline is equipped with a safety / back pressure integrated valve; the third venting pipeline is equipped with a sixth control valve. The beneficial effects of this step are: the first and third venting pipelines are for draining residual liquid in the inlet and outlet main pipelines when not in use for a long time or during maintenance; the second venting pipeline is for ensuring the safe and stable operation of the outlet main pipeline.

[0008] Furthermore: a liquid collection tank is provided on one side of the dosing unit, and the outlets of the second and third venting pipes face the liquid collection tank. The beneficial effect of this step is that the liquid collection tank is used to collect the vented liquid.

[0009] Furthermore: a drain pipe is provided on one side of the collection tank, and a collection tank is provided below the drain pipe. The drain pipe and the collection tank are connected by a guide plate. The beneficial effect of this step is that the collection tank is used to collect the emptied medicine and transport it out.

[0010] Furthermore, the diameters of the inlet manifold and the outlet manifold are larger than the diameters of the dosing pump inlet pipe and the dosing pump outlet pipe. The beneficial effects of this step are: ensuring that the inlet manifold can provide sufficient liquid to be drawn by the dosing unit in a timely manner, and ensuring that the internal pressure of the outlet manifold will not be too high.

[0011] Furthermore: the main inlet pipe is equipped with a main control valve at the front end of the dosing unit. The beneficial effect of this step is that the main inlet pipe can be opened or shut off by the main control valve.

[0012] Furthermore, the first control valve, the third control valve, and the fifth control valve are solenoid valves. The beneficial effect of this step is that they can be electrically connected to control systems such as PLCs to achieve automatic control.

[0013] This utility model also provides a dosing workshop, including: Several liquid medicine storage tanks; Several dosing systems as described in any of the above, wherein the inlet manifold of each dosing system is connected to the corresponding drug storage tank; The drain outlets are connected to the sewage tank.

[0014] This invention can centralize all the liquid medicine storage tanks and dosing systems, enabling centralized maintenance and reducing the amount of wiring required.

[0015] The beneficial effects of this utility model are: 1. This application connects multiple dosing units in parallel to the inlet manifold and the outlet manifold, and by switching the operating status of multiple first control valves on the outlet manifold, multiple dosing units can be used in combination or individually, and dosing can be performed on different sewage tanks through different discharge ports; 2. The dosing workshop centrally sets up multiple liquid storage tanks and dosing systems, which is more convenient for daily use and maintenance, and can also reduce the amount of wiring. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a dosing system provided by the present invention; Figure 2 for Figure 1 Top view; Figure 3 for Figure 1 Enlarged view of part A in the middle; Figure 4 This is a partial structural diagram of a dosing workshop provided by the present invention.

[0018] Figure label: 1-Inlet main pipe; 2-Dosing unit; 3-Outlet main pipe; 4-Collection tank; 5-Collection vessel; 6-Drug storage tank; 7-Dosing system; 11-Main control valve; 21-Dosing pump; 22-Dosing pump inlet line; 23-Dosing pump outlet line; 31-First control valve; 32-Drain port; 41-Drain pipe; 42-Guide plate; 221-Inlet main line; 222-Third control valve; 223-Filter; 224-First vent line; 231-Outlet main line; 232-Pressure gauge; 233-Fifth control valve; 234-Second vent line; 235-Third vent line; 321-Second control valve; 2241 - Fourth control valve; 2341 - Safety / back pressure integrated valve; 2351 - Sixth control valve. Detailed Implementation

[0019] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention. It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0020] The implementation of the dosing system 7 in this application is as follows: Figures 1-3 As shown, the dosing system 7 specifically includes: inlet manifold 1; Several sets of dosing units 2, the inlet of each dosing unit 2 is connected to the main inlet pipe 1; The main outlet pipe 3 is connected to the outlet of each group of dosing units 2, and a first control valve 31 is provided between each outlet. The main outlet pipe 3 is provided with at least two drain ports 32, and each drain port 32 is provided with a second control valve 321. The dosing unit 2 includes: Dosing pump 21; The inlet pipe 22 of the dosing pump is connected at one end to the main inlet pipe 1 and at the other end to the dosing pump 21; The liquid outlet pipeline 23 of the dosing pump is connected at one end to the main liquid outlet pipeline 3 and at the other end to the dosing pump 21.

[0021] In this invention, several groups of dosing units 2 can work independently or collaboratively, and the delivery direction of each dosing unit 2 can be adjusted by opening and closing the first control valve 31. Figure 1 For example, Figure 1 The display shows five dosing units 2 and four first control valves 31. The four first control valves 31 are numbered 1#, 2#, 3# and 4# from left to right. When the demand for medicine at the left drain port 32 of the main outlet pipe 3 is large and the demand for medicine at the right drain port 32 is small, 1#, 2# and the five dosing units 2 work simultaneously. However, the first control valve 3# is closed and the other first control valves 31 are open, so that three dosing units 2 deliver medicine to the left and two dosing units 2 deliver medicine to the right.

[0022] In other usage scenarios, the start / stop of the dosing unit 2 and the opening / closing of the first control valve 31 can be adjusted according to the required amount of liquid medicine, the operating status of the equipment, etc.

[0023] Based on the above technical solution, the dosing pump inlet pipeline 22 includes: Inlet main line 221; The third control valve 222 is located at the front end of the main liquid inlet pipeline 221; Filter 223 is located at the rear end of the main liquid inlet pipeline 221. Filter 223 may be a Y-type filter. The first venting pipe 224 is located between the third control valve 222 and the filter 223, and a fourth control valve 2241 is provided on the first venting pipe 224. The dosing pump outlet pipeline 23 includes: Main outlet pipe 231; Pressure gauge 232 is located at the front end of the liquid outlet main pipeline 231 and can be used to detect the operating pressure of the liquid outlet main pipeline 231; The fifth control valve 233 is located at the rear end of the main liquid outlet pipeline 231; The second vent pipe 234 and the third vent pipe 235 are sequentially arranged between the pressure gauge 232 and the fifth control valve 233; The second venting pipeline 234 is equipped with a safety / back pressure integrated valve 2341; the third venting pipeline 235 is equipped with a sixth control valve 2351. The first venting pipeline 234 stabilizes the operating pressure of the liquid outlet pipeline 231 through the safety / back pressure integrated valve 2341. When the pressure exceeds the set value, it can also discharge the liquid to achieve the function of pressure relief, so that the dosing unit 2 can operate safely. The first venting pipeline 224 and the third venting pipeline 235 are for emptying the residual liquid in the liquid inlet pipeline 22 and the liquid outlet pipeline 23 when not in use for a long time or during maintenance.

[0024] Based on the above technical solution, a liquid collection tank 4 is provided on one side of the dosing unit 2. The outlets of the second venting pipe 234 and the third venting pipe 235 face the liquid collection tank 4, which is used to collect the vented liquid. As for the first venting pipe 224, since it is not frequently used, it can be suspended or its pipe can be extended so that its outlet also faces the liquid collection tank 4.

[0025] Based on the above technical solution, a drain pipe 41 is provided on one side of the liquid collection tank 4, and a liquid collection tank 5 is provided below the drain pipe 41. The drain pipe 41 and the liquid collection tank 5 are connected by a guide plate 42. The medicine collected in the liquid collection tank 4 can flow into the liquid collection tank 5 through the drain pipe 41 and the guide plate 42. The liquid collection tank 5 is used to collect the emptied medicine and transfer it out.

[0026] Based on the above technical solution, the diameters of the inlet manifold 1 and the outlet manifold 3 are larger than the diameters of the dosing pump inlet pipe 22 and the dosing pump outlet pipe 23. For example, the inlet manifold 1 and the outlet manifold 3 can be DN63 pipes, and the dosing pump inlet pipe 22 and the dosing pump outlet pipe 23 can be DN32 pipes. This ensures that the inlet manifold 1 can provide enough liquid to be drawn by the dosing unit 2 in a timely manner, and that the internal pressure of the outlet manifold 3 will not be too high.

[0027] Based on the above technical solution, the main inlet pipe 1 is provided with a main control valve 11 at the front end of the dosing unit 2, and the main inlet pipe 1 is opened or cut off by the main control valve 11.

[0028] Based on the above technical solution, the first control valve 31, the third control valve 222, and the fifth control valve 233 are solenoid valves, which can be electrically connected to a PLC or other control system to achieve automatic control. The control system can be equipped with various sensors to detect drug concentration, flow rate, and water quality in the sewage tank, etc., and control the opening and closing of the valves based on the detection results and the calculation software within the control system to achieve automated control.

[0029] This utility model also provides a dosing workshop, including: Several liquid storage tanks 6 are used to store different types of pharmaceuticals, such as sodium hypochlorite, coagulants, sodium acetate, etc. A plurality of dosing systems 7 as described in any of the above descriptions, wherein the inlet manifold 1 of each dosing system 7 is connected to the corresponding drug storage tank 6; when different drug storage tanks 6 store the same drug, the inlet manifold 1 can also be connected in parallel with the drug storage tanks 6. The drain outlets 32 are connected to different sewage tanks respectively.

[0030] This invention can integrate all the liquid storage tanks 6 and the dosing system 7 into one place, enabling centralized maintenance and reducing the amount of wiring (except for the drain outlet 32 ​​pipeline).

[0031] In the above, the first control valve 31, the second control valve 321, the third control valve 222, the fourth control valve 2241, the fifth control valve 233 and the sixth control valve 2351 can be ball valves, gate valves or butterfly valves, etc., and can be manual valves with mechanical structure, solenoid valves, or used in combination with electric / pneumatic actuators.

[0032] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of this invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification. In the description of this specification, references to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A dosing system, characterized in that, include: Inlet manifold; Several sets of dosing units, with the inlet of each dosing unit connected to the main inlet pipe; The main outlet pipe is connected to the outlet of each of the dosing units, and a first control valve is provided between each outlet. The main outlet pipe is provided with at least two drain ports, and each drain port is provided with a second control valve. The dosing unit includes: Dosing pump; The dosing pump inlet pipeline has one end connected to the main inlet pipe and the other end connected to the dosing pump; The liquid outlet pipeline of the dosing pump is connected at one end to the main liquid outlet pipeline and at the other end to the dosing pump.

2. The dosing system according to claim 1, characterized in that, The dosing pump inlet pipeline includes: Main inlet pipeline; The third control valve is located at the front end of the main liquid inlet pipeline; A filter is located at the rear end of the main inlet pipe; The first venting pipeline is located between the third control valve and the filter, and a fourth control valve is provided on the first venting pipeline; The dosing pump outlet pipeline includes: Main outlet pipeline; A pressure gauge is installed at the front end of the main liquid outlet pipeline; The fifth control valve is located at the rear end of the main liquid outlet pipeline; The second and third venting lines are sequentially located between the pressure gauge and the fifth control valve. The second venting pipeline is equipped with a safety / back pressure integrated valve; the third venting pipeline is equipped with a sixth control valve.

3. The dosing system according to claim 2, characterized in that, The dosing unit is provided with a liquid collection tank on one side, and the outlets of the second and third venting pipelines face the liquid collection tank.

4. The dosing system according to claim 3, characterized in that, A drain pipe is provided on one side of the liquid collection tank, and a liquid collection tank is provided below the drain pipe. The drain pipe and the liquid collection tank are connected by a guide plate.

5. The dosing system according to claim 1, characterized in that, The diameters of the inlet manifold and the outlet manifold are larger than the diameters of the dosing pump inlet pipe and the dosing pump outlet pipe.

6. The dosing system according to claim 1, characterized in that, The main inlet pipe is equipped with a main control valve at the front end of the dosing unit.

7. The dosing system according to claim 2, characterized in that, The first control valve, the third control valve, and the fifth control valve are solenoid valves.

8. A dosing workshop, characterized in that, include: Several liquid medicine storage tanks; A plurality of dosing systems as described in any one of claims 1 to 7, wherein the main inlet pipe of each dosing system is connected to the corresponding drug storage tank; The drain outlets are connected to the sewage tank.

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