Dirt cleaning device for flow meter of phosphoric acid production pipeline

Abstract

The utility model provides a phosphoric acid production pipeline flowmeter dirt cleaning device which comprises a liquid storage tank, a supply pipe, a return pipe, a first valve, a second valve and a controller, the first valve, the second valve and a flowmeter are all installed on a phosphoric acid production pipeline, and the flowmeter is arranged between the first valve and the second valve. The supply pipe and the return pipe are both connected between the liquid storage tank and the phosphoric acid production pipeline, the supply pipe is connected between the first valve and the flow meter, the return pipe is connected between the second valve and the flow meter, and the control end of the first valve and the control end of the second valve are electrically connected with the controller. By the adoption of the technical scheme, the first valve and the second valve are directly closed through the controller, cleaning fluid flows through the interior of the flow meter, dirt in the flow meter can be removed, the auxiliary process time for disassembling the flow meter is shortened, the interruption time of a phosphoric acid production system is shortened, and the production efficiency is improved. And a foundation is laid for improving economic benefits of enterprises.

Description

Technical Field

[0001] The utility model belongs to the technical field of cleaning equipment, in particular to a dirt cleaning device for a flow meter in a phosphoric acid production pipeline. Background Art

[0002] Electromagnetic flowmeters offer a simple and reliable structure, no moving parts, a long service life, no flow-blocking components, no pressure loss or fluid blockage, no mechanical inertia, fast response, and excellent stability. They can be used in automatic detection, regulation, and program-controlled systems. Their measurement accuracy is unaffected by the type of medium being measured, its temperature, viscosity, density, pressure, and other physical parameters. Electromagnetic flowmeters measure flow based on Faraday's law of electromagnetic induction. Their advantages include minimal pressure drop, a wide measurable flow range, and a maximum to minimum flow ratio generally exceeding 20:1. They are suitable for a wide range of industrial pipe diameters, up to 3 meters in length. Their output signal is linearly proportional to the measured flow rate, resulting in high accuracy. They can measure the flow of fluids with a conductivity of 5 μs / cm or greater, including acids, alkalis, salt solutions, water, sewage, corrosive liquids, and slurries, mineral slurries, and paper pulp. However, when the electromagnetic flowmeter is used for measurement on the phosphoric acid production pipeline, due to the presence of dirt in the phosphoric acid medium, a large amount of dirt will remain in the electromagnetic flowmeter after long-term use, resulting in an increase in the measurement error of the electromagnetic flowmeter. Therefore, the inside of the electromagnetic flowmeter must be cleaned regularly.

[0003] For example, patent document CN113245316B discloses a device for cleaning scale from an electromagnetic flowmeter, comprising a workbench and an electromagnetic flowmeter body. The workbench's upper surface is provided with a cleaning assembly, a square groove is defined in the upper surface of the workbench, and a clamping assembly is further provided on the upper surface of the workbench. The electromagnetic flowmeter body is disposed within the clamping assembly. A water pump is fixedly mounted on the upper surface of the workbench, the water outlet of the water pump being connected to a first water pipe, the other end of the first water pipe being connected to a water spray gun, and the water inlet of the water pump being connected to a second water pipe. A crushing and stirring assembly is fixedly mounted on the upper surface of the workbench. This patented technical solution allows the electromagnetic flowmeter to be stably supported and fixed during cleaning. However, since the electromagnetic flowmeter requires regular cleaning, it must be disassembled each time it is cleaned. This significantly increases labor intensity and auxiliary process time, resulting in prolonged downtime in the phosphoric acid production system and impacting the company's economic benefits. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a device for cleaning dirt of a flow meter in a phosphoric acid production pipeline.

[0005] The utility model is achieved through the following technical solutions.

[0006] The utility model provides a device for cleaning dirt of a flow meter in a phosphoric acid production pipeline, comprising a liquid storage tank, a supply pipe, a return pipe, a first valve, a second valve and a controller, wherein the first valve, the second valve and the flow meter are all installed on the phosphoric acid production pipeline, and the flow meter is arranged between the first valve and the second valve, the supply pipe and the return pipe are both connected between the liquid storage tank and the phosphoric acid production pipeline, the supply pipe is connected between the first valve and the flow meter, the return pipe is connected between the second valve and the flow meter, and the control end of the first valve and the control end of the second valve are electrically connected to the controller respectively.

[0007] A third valve, a cleaning pump, and a fourth valve are also installed on the supply pipe, and the third valve, the cleaning pump, and the fourth valve are arranged in sequence between the phosphoric acid production pipeline and the liquid storage tank. The control end of the third valve, the control end of the cleaning pump, and the control end of the fourth valve are electrically connected to the controller respectively.

[0008] The liquid storage tank is also connected to one end of the liquid distribution pipe, the other end of the liquid distribution pipe extends upward in the vertical direction, and a fifth valve is also installed on the liquid distribution pipe, and the control end of the fifth valve is electrically connected to the controller.

[0009] A sixth valve is also installed on the return pipe, and a control end of the sixth valve is electrically connected to the controller.

[0010] A heat exchange coil is also installed in the liquid storage tank, the heat exchange coil is connected to the steam pipe, a seventh valve is installed on the steam pipe, and a control end of the seventh valve is electrically connected to the controller.

[0011] A monitor is also installed in the liquid storage tank, and a control end of the monitor is electrically connected to the controller.

[0012] The liquid storage tank is also connected to a sewage pipe, an eighth valve is installed on the sewage pipe, and a control end of the eighth valve is electrically connected to the controller.

[0013] The controller is a PLC programmable logic controller.

[0014] The monitor includes one or more of a thermometer, a pH meter, and a liquid level meter.

[0015] The number of the phosphoric acid production pipelines is 2.

[0016] The beneficial effect of the utility model is that: when adopting the technical solution of the utility model, when cleaning the flow meter, there is no need to disassemble the flow meter. The first valve and the second valve are directly closed by the controller, and the cleaning liquid is allowed to flow through the inside of the flow meter to complete the cleaning of the dirt inside the flow meter. Compared with the existing technology, the auxiliary process time for disassembling the flow meter is shortened, the labor intensity of personnel is reduced, and the interruption time of the phosphoric acid production system is reduced, laying a foundation for improving the economic benefits of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the present utility model.

[0018] In the figure: 1-liquid storage tank, 2-supply pipe, 3-reflux pipe, 4-first valve, 5-second valve, 6-controller, 7-flow meter, 8-phosphoric acid production pipeline, 9-third valve, 10-cleaning pump, 11-fourth valve, 12-liquid distribution pipe, 13-fifth valve, 14-sixth valve, 15-heat exchange coil, 16-steam pipe, 17-seventh valve, 18-monitor, 19-drain pipe, 20-eighth valve. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the described solution.

[0020] like Figure 1 As shown, the utility model provides a dirt cleaning device for a flow meter in a phosphoric acid production pipeline, comprising a liquid storage tank 1, a supply pipe 2, a return pipe 3, a first valve 4, a second valve 5 and a controller 6. The first valve 4, the second valve 5 and the flow meter 7 are all installed on the phosphoric acid production pipeline 8, and the flow meter 7 is arranged between the first valve 4 and the second valve 5. The supply pipe 2 and the return pipe 3 are both connected between the liquid storage tank 1 and the phosphoric acid production pipeline 8, and the supply pipe 2 is connected between the first valve 4 and the flow meter 7, and the return pipe 3 is connected between the second valve 5 and the flow meter 7. The control end of the first valve 4 and the control end of the second valve 5 are electrically connected to the controller 6 respectively.

[0021] By adopting the technical solution of the present invention, when cleaning the flow meter, there is no need to disassemble the flow meter. The first valve and the second valve are directly closed by the controller, and the cleaning liquid is allowed to flow through the inside of the flow meter to complete the cleaning of the dirt inside the flow meter. Compared with the existing technology, the auxiliary process time for disassembling the flow meter is shortened, the labor intensity of personnel is reduced, and the interruption time of the phosphoric acid production system is reduced, laying a foundation for improving the economic benefits of the enterprise.

[0022] Specifically, the supply pipe 2 is further equipped with a third valve 9, a cleaning pump 10, and a fourth valve 11. These valves are sequentially arranged between the phosphoric acid production pipeline 8 and the liquid storage tank 1. The control terminals of the third valve 9, the cleaning pump 10, and the fourth valve 11 are electrically connected to the controller 6. The cleaning pump 10 is preferably a booster pump, and the cleaning fluid is preferably a dilute sulfuric acid solution with a concentration of 5% to 8% and a pH greater than 1, to facilitate the removal of dirt from the flowmeter.

[0023] In addition, the liquid storage tank 1 is also connected to one end of the liquid distribution pipe 12, and the other end of the liquid distribution pipe 12 extends upward in the vertical direction. A fifth valve 13 is also installed on the liquid distribution pipe 12, and the control end of the fifth valve 13 is electrically connected to the controller 6. A sixth valve 14 is also installed on the return pipe 3, and the control end of the sixth valve 14 is electrically connected to the controller 6. A heat exchange coil 15 is also installed in the liquid storage tank 1, and the heat exchange coil 15 is connected to the steam pipe 16. A seventh valve 17 is installed on the steam pipe 16, and the control end of the seventh valve 17 is electrically connected to the controller 6. By adopting the technical solution of the present utility model, high-temperature steam is fed into the heat exchange exhaust pipe 15 through the steam pipe 16. The high-temperature steam heats the cleaning liquid, which is beneficial to improving the activity of the cleaning liquid. When the cleaning liquid is fed into the flow meter, the cleaning liquid can more easily remove the internal dirt.

[0024] In addition, a monitor 18 is installed in the liquid storage tank 1, and the control end of the monitor 18 is electrically connected to the controller 6. Preferably, the controller 6 is a PLC programmable logic controller. The monitor 18 includes one or more of a thermometer, a pH meter, and a liquid level gauge. Using the technical solution of the present invention, experiments have shown that the use of a dilute sulfuric acid solution with a concentration of 5%-8%, a pH value greater than 1, and a temperature of 65°C-75°C can more easily completely remove the dirt in the flow meter. By monitoring the temperature, pH value and liquid level of the cleaning liquid in the liquid storage tube respectively through the thermometer, pH meter, and liquid level gauge, regular and automated control of the cleaning work is achieved, which greatly reduces the labor intensity and working time of personnel and improves the economic benefits of the enterprise.

[0025] Specifically, liquid storage tank 1 is also connected to a drain pipe 19, which is equipped with an eighth valve 20. The control end of eighth valve 20 is electrically connected to controller 6. The cleaning liquid flows back into liquid storage tank 1 after cleaning, settles, and is ultimately discharged through drain pipe 19. Since there are two phosphoric acid production pipelines 8, the present invention can simultaneously clean multiple flow meters or perform rotational cleaning according to a program set in the controller.

Claims

1. A device for cleaning dirt from a flow meter in a phosphoric acid production pipeline, characterized by: The invention comprises a liquid storage tank (1), a supply pipe (2), a return pipe (3), a first valve (4), a second valve (5) and a controller (6); the first valve (4), the second valve (5) and the flow meter (7) are all installed on a phosphoric acid production pipeline (8); the flow meter (7) is arranged between the first valve (4) and the second valve (5); the supply pipe (2) and the return pipe (3) are both connected between the liquid storage tank (1) and the phosphoric acid production pipeline (8); the supply pipe (2) is connected between the first valve (4) and the flow meter (7); the return pipe (3) is connected between the second valve (5) and the flow meter (7); the control end of the first valve (4) and the control end of the second valve (5) are respectively electrically connected to the controller (6).

2. The device for cleaning dirt from a flow meter in a phosphoric acid production pipeline according to claim 1, wherein: A third valve (9), a cleaning pump (10) and a fourth valve (11) are also installed on the supply pipe (2), and the third valve (9), the cleaning pump (10) and the fourth valve (11) are arranged in sequence between the phosphoric acid production pipeline (8) and the liquid storage tank (1), and the control end of the third valve (9), the control end of the cleaning pump (10) and the control end of the fourth valve (11) are electrically connected to the controller (6) respectively.

3. The device for cleaning dirt from a flow meter in a phosphoric acid production pipeline according to claim 2, wherein: The liquid storage tank (1) is also connected to one end of a liquid distribution pipe (12), the other end of which extends upward in a vertical direction. A fifth valve (13) is also installed on the liquid distribution pipe (12), and a control end of the fifth valve (13) is electrically connected to the controller (6).

4. The device for cleaning dirt from a flow meter in a phosphoric acid production pipeline according to claim 1, wherein: A sixth valve (14) is also installed on the return pipe (3), and a control end of the sixth valve (14) is electrically connected to the controller (6).

5. The device for cleaning dirt from a flow meter in a phosphoric acid production pipeline according to claim 3, wherein: A heat exchange coil (15) is also installed in the liquid storage tank (1), and the heat exchange coil (15) is connected to a steam pipe (16). A seventh valve (17) is installed on the steam pipe (16), and a control end of the seventh valve (17) is electrically connected to the controller (6).

6. The device for cleaning dirt from a flow meter in a phosphoric acid production pipeline according to claim 5, characterized in that: A monitor (18) is also installed in the liquid storage tank (1), and a control end of the monitor (18) is electrically connected to the controller (6).

7. The device for cleaning dirt from a flow meter in a phosphoric acid production pipeline according to claim 3, wherein: The liquid storage tank (1) is also connected to a sewage pipe (19), an eighth valve (20) is installed on the sewage pipe (19), and a control end of the eighth valve (20) is electrically connected to the controller (6).

8. A device for cleaning dirt from a flow meter in a phosphoric acid production pipeline according to any one of claims 1 to 7, characterized in that: The controller (6) is a PLC programmable logic controller.

9. The device for cleaning dirt from a flow meter in a phosphoric acid production pipeline according to claim 6, wherein: The monitor (18) includes one or more of a thermometer, a pH meter, and a liquid level meter.

10. A device for cleaning dirt from a flow meter in a phosphoric acid production pipeline according to claim 1 or 2, characterized in that: The number of the phosphoric acid production pipelines (8) is 2.

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