PAC dosing system

Abstract

The utility model relates to the field of water treatment, and provides a PAC dosing system which comprises a liquid storage tank, an output pipeline and a calibration pipeline, and the liquid storage tank is provided with a plurality of water inlet pipelines and at least one medicine inlet pipeline; a first valve, a second valve, a dosing pump, a third valve and an adding pipe section are sequentially arranged on the output pipeline in the conveying direction; the inlet end of the calibration pipeline is arranged between the first valve and the second valve, the outlet end of the calibration pipeline is arranged between the second valve and the dosing pump, and a calibration column and a fourth valve are sequentially arranged on the calibration pipeline in the conveying direction. By means of the calibration column on the calibration pipeline, liquid medicine which is evenly mixed through the medicine storage tank can be quantitatively conveyed, then the liquid medicine is accurately added through the medicine adding pump, accurate liquid medicine amount and medicine matching are achieved, then the liquid medicine is output through the adding pipe section, the purpose of accurately controlling the liquid medicine is achieved, and the water quality after sewage treatment is guaranteed; the treated water quality is stable.

Description

Technical Field

[0001] The utility model relates to the field of water treatment, in particular to a PAC dosing system. Background Art

[0002] As people's awareness of environmental protection increases, more and more companies and individuals begin to pay attention to water treatment. In water treatment, drugs are added to achieve the purpose of efficient purification of sewage, such as domestic sewage, industrial wastewater, drinking water, etc. By adjusting the dosage of drugs and other process parameters, different water quality conditions can be treated.

[0003] However, in the current treatment process, the dosage of chemicals is not accurately controlled, and many are added manually, which further reduces the accuracy and directly affects the water treatment effect. That is, the unstable dosage leads to poor temperature sensitivity of sewage treatment, affecting the final treated water quality and requiring rework, which is time-consuming and labor-intensive. Utility Model Content

[0004] The utility model aims to provide a PAC dosing system, aiming to improve the problem that the dosage of the existing PAC is low in accuracy, resulting in unstable treated water quality.

[0005] To achieve the above purpose, the utility model adopts the following technical solution: a PAC dosing system, comprising:

[0006] A liquid storage tank, on which a plurality of water inlet pipelines and at least one drug inlet pipeline are arranged;

[0007] An output pipeline, which is provided with a first valve, a second valve, a dosing pump, a third valve and a dosing pipe section in sequence along the conveying direction; and

[0008] The inlet end of the calibration pipeline is arranged between the first valve and the second valve, the outlet end of the calibration pipeline is arranged between the second valve and the dosing pump, and the calibration column and the fourth valve are arranged in sequence on the calibration pipeline along the conveying direction.

[0009] Preferably, a reducing valve is provided on the starting section of the output pipeline, and the reducing valve is located between the first valve and the liquid storage tank.

[0010] Preferably, a pressure gauge is provided on the output pipeline, and the pressure gauge is arranged between the dosing pump and the third valve.

[0011] Preferably, the liquid storage tank and the output pipeline are arranged in multiple numbers side by side, an input branch connected to the input end of the calibration column is arranged between the first valve and the second valve of the multiple output pipelines, and the output end of the calibration column is provided with output branches and fourth valves having the same number as the output pipelines, and one output branch is arranged on one output pipeline.

[0012] Preferably, a series pipeline connecting a plurality of the output pipelines is provided between the injection pipe section and the third valve, and a fifth valve is provided between the series pipeline and one of the third valves.

[0013] Preferably, the number of the dosing pipe sections is less than or equal to the number of the output pipelines, and the dosing pipe sections are arranged side by side on the series pipelines.

[0014] Preferably, a reflux pipeline returning to the liquid storage tank is further provided, and a reflux branch connected to the reflux pipeline is provided between the dosing pump and the third valve in the output pipeline, and a safety valve is provided on the reflux branch.

[0015] Preferably, a control valve is provided on the dosing pipe section.

[0016] Preferably, a first electric ball valve is provided on the water inlet pipeline; and a second electric ball valve is provided on the drug inlet pipeline.

[0017] Preferably, a pressure relief branch is provided between the pressure gauge and the third valve, and a sixth valve is provided on the pressure relief branch.

[0018] After adopting the above technical solution, the utility model has the following advantages compared with the background technology:

[0019] 1. By using the calibration column on the calibration pipeline, the evenly mixed liquid medicine in the medicine storage tank can be quantitatively transported, and then the dosing pump can be used to accurately add the medicine to achieve the precise liquid medicine and agent ratio, and then it can be output through the dosing pipe section to achieve the purpose of precise control of the liquid medicine, which guarantees the water quality after sewage treatment, that is, the water quality after treatment is stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the PAC dosing system described in the utility model;

[0021] Figure 2 The schematic diagram of the PAC dosing system described in the utility model includes multiple liquid storage tanks and output pipelines.

[0022] Description of reference numerals:

[0023] 10. Liquid storage tank; 101. Water inlet pipeline; 102. Drug inlet pipeline; 103. First electric ball valve; 104. Second electric ball valve;

[0024] 20, output pipeline; 201, first valve; 202, second valve; 203, dosing pump; 204, third valve; 205, dosing pipe section; 206, reducing valve; 207, pressure gauge; 208, series pipeline; 209, fifth valve; 210, pressure relief branch;

[0025] 2051, control valve; 2101, sixth valve;

[0026] 30. Calibration pipeline; 301. Calibration column; 302. Fourth valve; 303. Input branch; 304. Output branch;

[0027] 40. Return line; 401. Safety valve. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0029] In addition, it should be noted that the terms "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element of the present invention must have a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] When an element is referred to as being “fixed to” or “disposed on” or “provided on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0031] Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0032] Example

[0033] Please refer to Figure 1 and Figure 2 As shown, this embodiment provides a PAC dosing system. PAC is polyaluminium chloride, a water purification material, an inorganic polymer coagulant, also referred to as polyaluminium, and its full English name is Poly Aluminium Chloride. It is an inorganic polymer water treatment agent with a large molecular weight and a high charge produced due to the bridging effect of hydroxide ions and the polymerization effect of multivalent anions.

[0034] The PAC dosing system includes a liquid storage tank 10, an output pipeline 20 and a calibration pipeline 30. The liquid storage tank 10 is provided with multiple water inlet pipelines 101 and at least one drug inlet pipeline 102; the output pipeline 20 is provided with a first valve 201, a second valve 202, a dosing pump 203, a third valve 204 and a dosing pipe section 205 in sequence along the conveying direction; the inlet end of the calibration pipeline 30 is arranged between the first valve 201 and the second valve 202, and the outlet end of the calibration pipeline 30 is arranged between the second valve 202 and the dosing pump 203. The calibration pipeline 30 is provided with a calibration column 301 and a fourth valve 302 in sequence along the conveying direction.

[0035] In this embodiment, the first valve 201 may be an electric ball valve, the second valve 202 and the fourth valve 302 may be common switch valves (such as ball valves, butterfly valves or solenoid valves, etc.), and the third valve 204 may be a back pressure valve.

[0036] Specifically, the required water and medicine are transported to the liquid storage tank 10 through the water inlet pipeline 101 and the medicine inlet pipeline 102 to mix the basic medicine solution, and then transported out of the liquid storage tank 10. When in use, the volume of the calibration column 301 can be determined according to the use flow rate and calibration time requirements of the dosing pump 203. For example, the flow rate of the dosing pump 203 is 60L / h, and the flow rate required to calibrate 1min, then the calculated flow rate per minute should be 60L÷60=1L, then you can choose to use a calibration column 301 (also called a flow correction column) with a volume of 1L. In this way, accurate liquid medicine supply can be carried out through the calibration column 301, at this time, the second valve 202 is in a closed state, and the first valve 201 and the third valve 204 are in an open state. If the liquid storage tank 10 and the output pipeline 20 are cleaned, the second valve 202 can be opened for direct delivery. Alternatively, when safe pressure relief delivery is required, the second valve 202 can be opened for direct output to improve practicality and safety.

[0037] Furthermore, the dosing pump 203 can be used to add drugs. The dosing pump 203 has the effect of accurately adding drugs. With the quantitative drug solution provided by the corresponding calibration column 301, accurate drug solution ratio can be achieved to achieve the effect of accurately controlling the amount of drugs added. Finally, the dosing pipe section 205 outputs the wastewater to the sewage sedimentation tank to be treated to ensure the quality of sewage treatment, achieve efficient treatment purposes, and reduce the cost of water treatment.

[0038] like Figure 1 As shown, in this embodiment, a variable diameter valve 206 is provided at the starting section of the output pipeline 20, and the variable diameter valve 206 is located between the first valve 201 and the liquid storage tank 10. The variable diameter valve 206 is a valve with different pipe diameters at both ends, which realizes the connection of two different pipelines to adapt to the use of different valves or pipelines, so that it can be used according to actual conditions, thereby improving practicality.

[0039] Specifically, in this embodiment, the diameter of the output pipe of the liquid storage tank 10 can be larger than the pipe diameter of the output pipe 20, so as to improve the efficiency of water delivery in the output pipe (i.e. reduce or avoid the occurrence of bubbles) and improve the accuracy of the proportion of the liquid medicine.

[0040] like Figure 1 and Figure 2 As shown, in this embodiment, a pressure gauge 207 is provided on the output pipeline 20, and the pressure gauge 207 is provided between the dosing pump 203 and the third valve 204. The setting of the pressure gauge 207 can display the water pressure on the output pipeline 20 in real time, so that when the water pressure is too high or too low, the water pressure of the output pipeline 20 can be manually regulated to ensure the safety of the use of the PAC dosing system.

[0041] like Figure 2 As shown, in this embodiment, a plurality of liquid storage tanks 10 and output pipelines 20 are arranged side by side, an input branch 303 connected to the input end of the calibration column 301 is arranged between the first valve 201 and the second valve 202 of the plurality of output pipelines 20, and the output end of the calibration column 301 is provided with the same number of output branches 304 and fourth valves 302 as the output pipelines 20, and an output branch 304 is arranged on an output pipeline 20.

[0042] In order to increase the volume of supply, multiple groups of liquid storage tanks 10 and output pipelines 20 can be set to increase the upper limit of the output volume to adapt to the use of sewage treatment plants of different volumes. When multiple liquid storage tanks 10 and output pipelines 20 are set, a calibration column 301 can be shared to reduce the cost of use. Of course, a calibration pipeline 30 can also be configured on each output pipeline 20 for use to achieve the purpose of accurate proportioning.

[0043] Furthermore, if Figure 2As shown, in this embodiment, a series pipeline 208 connecting multiple output pipelines 20 is arranged between the dosing pipe section 205 and the third valve 204, and a fifth valve 209 is arranged between the series pipeline 208 and a third valve 204. The fifth valve 209 can be a commonly used switch valve (such as a ball valve, a butterfly valve or a solenoid valve, etc.); the design of the series pipeline allows the configured liquid medicine to flow through the series pipeline and then be output through the dosing pipe section 205, so that it is convenient to flexibly design the position and number of the dosing pipe section 205, and improve the flexibility of the pipeline layout. At the same time, the liquid medicine can be mixed more evenly to ensure the effect of sewage treatment.

[0044] like Figure 2 As shown, in this embodiment, the number of the dosing pipe sections 205 is less than or equal to the number of the output pipelines 20, and they are arranged side by side on the series pipeline 208. The number of the dosing pipe sections 205 is at least one, and by reducing the number of the dosing pipe sections 205, it can be ensured that the drug solution in the dosing pipe sections 205 is sufficient to ensure the amount of drug solution added, that is, it can ensure that the water quality of the sewage treatment is good.

[0045] like Figure 2 As shown, in this embodiment, a reflux pipeline 40 is further provided to reflux to a liquid storage tank 10, and a reflux branch connected to the reflux pipeline 40 is provided between the dosing pump 203 and the third valve 204 in the output pipeline 20, and a safety valve 401 is provided on the reflux branch. The design of the reflux pipeline 40 can improve the safety of the PAC dosing system.

[0046] Specifically, if the water pressure in the output pipeline 20 is too high, the safety valve 401 is opened to divert the liquid medicine to the return pipeline 40, and then return it to the liquid storage tank 10, thereby reducing the pressure on the output pipeline 20, avoiding waste of liquid medicine and improving safety of use.

[0047] like Figure 1 As shown, in this embodiment, a control valve 2051 is provided on the dosing pipe section 205, and the control valve 2051 can be used to accurately control the time and amount of adding liquid medicine, further improve the accuracy of liquid medicine supply, ensure the qualified rate of treated water quality, and improve practicality.

[0048] In this embodiment, a first electric ball valve 103 is provided on the water inlet pipeline 101; a second electric ball valve 104 is provided on the drug inlet pipeline 102. Both the first electric ball valve 103 and the second electric ball valve 104 are electric ball valves. The water inlet pipeline 101 can be opened through the first electric ball valve 103 to replenish water for the liquid storage tank 10; similarly, the drug inlet pipeline 102 can be opened through the second electric ball valve 104 to replenish medicine for the liquid storage tank 10, thereby realizing intelligent control. A plurality of manual switch valves can also be provided on the water inlet pipeline 101 and the drug inlet pipeline 102 to improve the safety of use, that is, when the electric ball valve is damaged, it can be switched on and off through the manual switch valve, which has an emergency effect.

[0049] like Figure 2 As shown, in this embodiment, the water inlet pipeline 101 and the drug inlet pipeline 102 of the liquid storage tank 10 can be designed in multiple ways, so that different drug liquids can be transported at the same time to cope with the use of different drug ratios required for transportation. At the same time, a discharge pipe can be designed at the bottom of the liquid storage tank 10, and a switch valve can be installed on the discharge pipe. The liquid in the liquid storage tank 10 can be discharged through the switch valve, such as the water in the liquid storage tank 10, to improve practicality.

[0050] like Figure 1 and Figure 2 As shown, in this embodiment, a pressure relief branch 210 is provided between the pressure gauge 207 and the third valve 204, and a sixth valve 2101 is provided on the pressure relief branch 210. The sixth valve 2101 may be a commonly used switch valve (such as a ball valve, a butterfly valve or a solenoid valve, etc.), and the design of the pressure relief branch 210 may cope with the situation where the pressure of the output pipeline 20 increases suddenly, and the sixth valve 2101 may be opened for emergency pressure relief to ensure the safety of the PAC dosing system.

[0051] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A PAC dosing system, characterized in that: include: A liquid storage tank, on which a plurality of water inlet pipelines and at least one drug inlet pipeline are arranged; An output pipeline, which is provided with a first valve, a second valve, a dosing pump, a third valve and a dosing pipe section in sequence along the conveying direction; and The inlet end of the calibration pipeline is arranged between the first valve and the second valve, the outlet end of the calibration pipeline is arranged between the second valve and the dosing pump, and the calibration column and the fourth valve are arranged in sequence on the calibration pipeline along the conveying direction.

2. The PAC dosing system according to claim 1, characterized in that: A variable-diameter valve is provided on the starting section of the output pipeline, and the variable-diameter valve is located between the first valve and the liquid storage tank.

3. The PAC dosing system according to claim 1, characterized in that: The output pipeline is provided with a pressure gauge, and the pressure gauge is arranged between the dosing pump and the third valve.

4. The PAC dosing system according to claim 1, characterized in that: The liquid storage tank and the output pipeline are arranged in multiple numbers side by side, and an input branch connected to the input end of the calibration column is arranged between the first valve and the second valve of the multiple output pipelines. The output end of the calibration column is provided with output branches and fourth valves with the same number as the output pipelines, and one output branch is arranged on one output pipeline.

5. The PAC dosing system according to claim 4, characterized in that: A series pipeline connecting a plurality of the output pipelines is arranged between the injection pipe section and the third valve, and a fifth valve is arranged between the series pipeline and one of the third valves.

6. The PAC dosing system according to claim 5, characterized in that: The number of the dosing pipe sections is less than or equal to the number of the output pipelines, and the dosing pipe sections are arranged side by side on the series pipelines.

7. The PAC dosing system according to claim 4, characterized in that: A reflux pipeline is also provided for returning to the liquid storage tank, and a reflux branch connected to the reflux pipeline is provided between the dosing pump and the third valve in the output pipeline, and a safety valve is provided on the reflux branch.

8. The PAC dosing system according to claim 1 or 6, characterized in that: The dosing pipe section is provided with a control valve.

9. The PAC dosing system according to claim 1, characterized in that: The water inlet pipeline is provided with a first electric ball valve; the drug inlet pipeline is provided with a second electric ball valve.

10. The PAC dosing system according to claim 3, characterized in that: A pressure relief branch is provided between the pressure gauge and the third valve, and a sixth valve is provided on the pressure relief branch.

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