Online cleaning system suitable for centrifugal machine

Abstract

The online cleaning system comprises a cleaning liquid storage tank, a machine pump and a circulating heater, the cleaning liquid storage tank is provided with an inlet pipeline and an outlet pipeline, the inlet pipeline is connected with a centrifugal machine unit, the outlet pipeline is connected with the machine pump, the machine pump is provided with a liquid conveying pipeline, and the liquid conveying pipeline is connected with the circulating heater. The liquid conveying pipeline is connected with the centrifugal machine unit, a heating branch connected to the cleaning liquid storage tank is arranged on the liquid conveying pipeline, the circulating heater is arranged on the heating branch, the circulating heater is connected with a heat source pipeline, and the circulating heater is provided with a backflow pipeline connected to the cleaning liquid storage tank. The device has the advantages of low cost, simplicity and convenience in operation, high safety and the like.

Description

Technical Field

[0001] This utility model relates, specifically, to an online cleaning system suitable for centrifuges. Background Technology

[0002] In maleic anhydride production units, the primary function of the centrifuge system is to separate water-soluble impurities from the process solvent. These impurities include fumaric acid, phthalic acid, phthalic anhydride, and tar. Water is added to the centrifuge system during the premixing step, and then a rotary separator is used to separate the oil and water phases. The treated lean oil is recycled, while wastewater is transported for off-site treatment. When centrifuges experience increased vibration, water contamination in the oil, or oil contamination in the water, which negatively impacts separation efficiency, cleaning is necessary. Otherwise, solvent loss, process fluctuations, and even equipment damage due to vibration may occur.

[0003] Currently, the industry practice for cleaning centrifuges in maleic anhydride production units typically involves disassembling the centrifuges after shutdown and immersing the rotating parts in hot water or alkaline solutions for cleaning. However, the rotating parts of centrifuges are precision components, and disassembly and reassembly can cause damage, increasing the need for seal replacement and resulting in high cleaning costs. Furthermore, alkaline cleaning poses a risk of personnel injury. Additionally, the cleaning work is physically demanding and time-consuming, increasing labor costs. Therefore, there is an urgent need for a centrifuge cleaning system that can address these issues and reduce costs and safety risks associated with the cleaning process. Utility Model Content

[0004] In view of this, the present invention provides an online cleaning system for centrifuges, which can meet the cleaning requirements of centrifuges without changing the existing maleic anhydride production centrifuge system.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] An online cleaning system for centrifuges includes a cleaning fluid storage tank, a pump, and a circulating heater. The cleaning fluid storage tank has an inlet pipeline and an outlet pipeline. The inlet pipeline is connected to the centrifuge unit, and the outlet pipeline is connected to the pump. The pump has a delivery pipeline connected to the centrifuge unit. The delivery pipeline has a heating branch connected to the cleaning fluid storage tank. The circulating heater is located on the heating branch and is connected to a heat source pipeline. The circulating heater also has a return pipeline connected to the cleaning fluid storage tank.

[0007] The cleaning solution storage tank contains cleaning solution. Powered by the pump, the cleaning solution in the storage tank is sent to the centrifuge unit through the outlet pipeline and the delivery pipeline. After soaking and rinsing the inside of the centrifuge unit, the cleaning solution returns to the cleaning solution storage tank through the inlet pipeline. By repeating the above actions, the centrifuge unit is repeatedly cleaned. The delivery pipeline is equipped with a heating branch with a circulating heater installed on it. The cleaning solution can enter the circulating heater through the heating branch, and the heating medium enters the circulating heater through the heat source pipeline. The cleaning solution exchanges heat with the heating medium and then returns to the cleaning solution storage tank. The circulating heater heats the cleaning solution in the storage tank to a suitable temperature to improve the cleaning effect on the centrifuge unit. In addition, the cooled heating medium after heat exchange returns to the cleaning solution storage tank through the return pipeline to be used as water replenishment for the cleaning solution storage tank.

[0008] It should be noted that the heating medium is high-temperature water. Since the cleaning fluid will be lost after cleaning the centrifuge, it is necessary to replenish the cleaning fluid storage tank with fresh cleaning fluid and water. The heating medium, after being cooled by heat exchange, can be used as water to replenish the cleaning fluid storage tank, so as to reduce waste and save costs.

[0009] Optionally, in one embodiment, pipeline valves are provided on the inlet pipeline, outlet pipeline, return pipeline, and heating branch.

[0010] In the above technical solution, pipeline valves are used to control the opening and closing of pipelines to adjust the operating status of pipelines connected to the cleaning fluid storage tank. When all pipeline valves are closed, the cleaning fluid storage tank can be inspected and maintained.

[0011] Optionally, in one embodiment, a control valve is provided on the infusion line.

[0012] In the above technical solution, the control valve is used to control the opening and closing of the infusion pipeline to control the entry of the cleaning fluid into the centrifuge.

[0013] Optionally, in one embodiment, a sewage treatment pipeline is connected to the infusion pipeline, and the sewage treatment pipeline is connected to the pipeline between the pump and the control valve.

[0014] In the above technical solution, the sewage treatment pipeline is connected to an external sewage treatment system. The waste liquid after cleaning the centrifuge is transported to the sewage treatment system through the sewage treatment pipeline. The connection point between the sewage treatment pipeline and the infusion pipeline is located between the pump and the control valve. After cleaning is completed, the control valve is closed, allowing the waste liquid to enter the sewage treatment pipeline.

[0015] Optionally, in one embodiment, a supplementary line is connected to the return line.

[0016] In the above technical solution, the supplementary pipeline is connected to an external storage area, which stores fresh cleaning fluid and can be used to replenish the cleaning fluid storage tank with fresh cleaning fluid.

[0017] Optionally, in one embodiment, a thermometer is installed on the cleaning fluid storage tank, and an electrically controlled regulating valve group is provided on the heat source pipeline, the electrically controlled regulating valve group being electrically connected to the thermometer.

[0018] In the above technical solution, the thermometer can detect the internal temperature of the cleaning fluid storage tank in real time and transmit the signal to the electronically controlled regulating valve group. The electronically controlled regulating valve group controls the opening and closing of the heat source pipeline according to the received signal, and controls whether the heating medium enters the circulating heater for heating. By controlling the delivery of the heating medium, the purpose of regulating the internal temperature of the cleaning fluid storage tank is achieved.

[0019] Optionally, in one embodiment, the cleaning fluid storage tank is equipped with a pressure gauge and a level gauge.

[0020] In the above technical solution, the pressure gauge is used to detect the internal pressure of the cleaning fluid storage tank to ensure safety, and the level gauge is used to detect the liquid level inside the cleaning fluid storage tank to confirm the remaining amount of cleaning fluid inside.

[0021] Optionally, in one embodiment, a tank protector is installed on the cleaning fluid storage tank, the tank protector being used to regulate the pressure inside the cleaning fluid storage tank.

[0022] In the above technical solution, the tank protection component can adjust the pressure of the cleaning fluid storage tank, control the pressure to not exceed the specified value, and ensure safe use.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0024] This invention enables online cleaning of centrifuges by using a cleaning fluid storage tank, pump, and circulating heater, eliminating the need to disassemble the centrifuge, reducing damage to centrifuge components and wear on seals, saving costs, and also preventing injury to workers during the cleaning process and reducing their labor intensity.

[0025] This invention, through its inlet and delivery pipelines, allows the cleaning solution to pass through the centrifuge multiple times under the action of the pump, achieving cyclic cleaning of the centrifuge, saving cleaning solution consumption and reducing cleaning costs.

[0026] This invention is equipped with a circulating heater, which can heat the cleaning solution in the cleaning solution storage tank to improve the cleaning effect during centrifuge cleaning. At the same time, the circulating heater is equipped with a return pipeline, which can input the heating medium used in the heating process into the cleaning solution storage tank as water replenishment for the cleaning solution storage tank, eliminating the need for an additional water replenishment pipeline and improving the convenience of system use. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of an online cleaning system according to one embodiment.

[0029] Explanation of the reference numerals in the figure:

[0030] Centrifuge unit; 2-Cleaning fluid storage tank; 21-Thermometer; 22-Level gauge; 23-Pressure gauge; 24-Storage tank protective components; 3-Pump; 4-Circulating heater; 5-Electrically controlled regulating valve group; 51-Solenoid valve; 6-Pipeline valve; 7-Control valve;

[0031] L1 - Inlet pipeline; L2 - Outlet pipeline; L3 - Infusion pipeline; L31 - Heating branch; L32 - Wastewater treatment pipeline; L4 - Heat source pipeline; L5 - Return pipeline; L51 - Supplementary pipeline;

[0032] M1 - Heating medium storage area; M2 - Wastewater treatment system; M3 - Cleaning fluid storage area. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0035] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0036] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0037] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0038] It should be noted that the arrows in the diagram represent the direction of fluid flow.

[0039] Please refer to Figure 1 This embodiment provides an online cleaning system connected to a centrifuge unit 1 in a maleic anhydride production system for cleaning the centrifuge unit 1. The system includes a cleaning fluid storage tank 2, a pump 3, and a circulating heater 4. The cleaning fluid storage tank 2 has an inlet pipeline L1 and an outlet pipeline L2. The inlet pipeline L1 is connected to the centrifuge unit 1, and the outlet pipeline L2 is connected to the pump 3. The pump 3 has a delivery pipeline L3 connected to the centrifuge unit 1. A heating branch L31 connected to the cleaning fluid storage tank 2 is provided on the delivery pipeline L3. The circulating heater 4 is located on the heating branch L31 and is connected to a heat source pipeline L4. The circulating heater 4 also has a return pipeline L5 connected to the cleaning fluid storage tank 2.

[0040] The cleaning solution storage tank 2 stores cleaning solution. Under the power provided by the pump 3, the cleaning solution in the cleaning solution storage tank 2 is sent into the centrifuge unit 1 through the outlet pipeline L2 and the infusion pipeline L3. After the cleaning solution soaks and rinses the inside of the centrifuge unit 1, it returns to the cleaning solution storage tank 2 through the inlet pipeline L1. In specific operation, the above actions can be repeated to clean the centrifuge unit 1 repeatedly to ensure that it is clean.

[0041] Specifically, the cleaning solution used for maleic anhydride centrifuges can be cleaning water, alkaline solution, surfactant, etc.

[0042] The infusion line L3 is equipped with a heating branch L31, and a circulating heater 4 is installed on the heating branch L31. The cleaning fluid can enter the circulating heater 4 through the heating branch L31. The heat source line L4 is connected to the external heating medium storage area M1, and the heating medium enters the circulating heater 4 through the heat source line L4. After the cleaning fluid exchanges heat with the heating medium, it returns to the cleaning fluid storage tank 2. The circulating heater 4 heats the cleaning fluid in the cleaning fluid storage tank 2 to a suitable temperature to improve the cleaning effect when cleaning the centrifuge unit 1. In addition, the heating medium that has cooled down after heat exchange in the circulating heater 4 enters the cleaning fluid storage tank 2 through the return line L5 to be used as water replenishment for the cleaning fluid storage tank 2.

[0043] It should be noted that the circulating heater 4 heats the cleaning fluid through heat exchange. The heating medium and the cleaning fluid enter the circulating heater 4 through the heat source pipeline L4 and the heating branch L31, respectively, for heat exchange.

[0044] Preferably, high-temperature water is used as the heating medium. Since the cleaning fluid will be lost after cleaning the centrifuge unit 1, it is necessary to replenish the cleaning fluid storage tank 2 with fresh cleaning fluid and water. The heating medium can be used as water replenishment for the cleaning fluid storage tank 2 after heat exchange and cooling, so as to reduce waste and save costs.

[0045] It is worth mentioning that the centrifuge unit 1 has a built-in valve (not shown in the figure). When the centrifuge unit 1 is working normally, the valve is in the closed state. At this time, the centrifuge unit 1 is not connected to the inlet pipeline L1 and the liquid delivery pipeline L3. After the cleaning liquid reaches the liquid delivery pipeline L3, it enters the circulating heat exchanger from the heating branch L31 for heating. The system can also be started in advance when the cleaning work has not been carried out, so that the cleaning liquid in the cleaning liquid storage tank 2 can be heated in advance for use at any time.

[0046] In this embodiment, pipeline valves 6 are provided on the inlet pipeline L1, outlet pipeline L2, return pipeline L5 and heating branch L31. The pipeline valves 6 can control the opening and closing of the pipelines to control the operating status of each pipeline.

[0047] Specifically, in this embodiment, when it is necessary to inspect and repair the cleaning fluid storage tank 2, all pipeline valves 6 can be closed to isolate the cleaning fluid storage tank 2 separately, which facilitates inspection and maintenance work.

[0048] In this embodiment, a control valve 7 is provided on the infusion pipeline L3, and a sewage treatment pipeline L32 is connected to the infusion pipeline L3. The connection point between the sewage treatment pipeline L32 and the infusion pipeline L3 is located between the pump 3 and the control valve 7. The control valve 7 is used to control the opening and closing of the infusion pipeline L3. The sewage treatment pipeline L32 is connected to the external sewage treatment system M2. After the centrifuge unit 1 is cleaned, the control valve 7 is closed. At this time, the cleaning waste liquid enters the sewage treatment pipeline L32 and is transported to the sewage treatment system M2 for treatment through the sewage treatment pipeline L32.

[0049] In this embodiment, a replenishment line L51 is connected to the return line L5. The replenishment line L51 is connected to the external cleaning fluid storage area M3, which stores fresh cleaning fluid and can be used to replenish the cleaning fluid storage tank 2 with fresh cleaning fluid.

[0050] Specifically, a level gauge 22 is installed on the cleaning fluid storage tank 2. The level gauge 22 is used to detect the liquid level inside the cleaning fluid storage tank 2. When the level gauge 22 detects that the liquid level inside the cleaning fluid storage tank 2 is insufficient, fresh cleaning fluid is added through the replenishment pipeline L51.

[0051] Preferably, a valve is provided on the supplementary pipeline L51 to control the opening and closing of the supplementary pipeline L51.

[0052] In this embodiment, a thermometer 21 is installed on the cleaning fluid storage tank 2, and an electrically controlled regulating valve group 5 is provided on the heat source pipeline L4. The electrically controlled regulating valve group 5 is electrically connected to the thermometer 21. The thermometer 21 can detect the internal temperature of the cleaning fluid storage tank 2 in real time and transmit the signal to the electrically controlled regulating valve group 5. The electrically controlled regulating valve group 5 controls the opening and closing of the heat source pipeline L4 according to the received signal, and controls whether the heating medium enters the circulating heater 4 for heating. By controlling the delivery of the heating medium, the purpose of regulating the internal temperature of the cleaning fluid storage tank 2 is achieved.

[0053] The electrically controlled regulating valve group 5 includes multiple solenoid valves 51. The solenoid valves 51 are switched on and off under the control of the built-in control program of the electrically controlled regulating valve group 5 to control the operating status of the heat source pipeline L4.

[0054] Preferably, a branch is provided on the heat source pipeline L4 to improve transportation efficiency. The electrically controlled regulating valve group 5 includes 4 solenoid valves 51, of which 3 solenoid valves 51 are provided on the main line of the heat source pipeline L4 and 1 solenoid valve 51 is provided on the branch.

[0055] It should be noted that the structure of the electronically controlled regulating valve group 5 in this embodiment is only for demonstration purposes, and its specific structure can be flexibly adjusted according to actual needs.

[0056] In this embodiment, a pressure gauge 23 is installed on the cleaning fluid storage tank 2. The pressure gauge 23 is used to detect the internal pressure of the cleaning fluid storage tank 2 to ensure safety.

[0057] In this embodiment, a tank protection component 24 is installed on the cleaning fluid storage tank 2. The tank protection component 24 is used to regulate the pressure inside the cleaning fluid storage tank 2, control the pressure to not exceed the specified value, and ensure safe use.

[0058] Specifically, the tank protection component 24 can be a pressure protection element such as an air supply pipe, a breather valve, or a safety valve. It can be connected and used in conjunction with the pressure gauge 23 to realize real-time detection and control of the internal pressure of the cleaning fluid storage tank 2, ensuring safe use.

[0059] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0060] In the description of this utility model, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0061] Furthermore, in the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0062] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

Claims

1. An online cleaning system suitable for centrifuges, characterized in that, The system includes a cleaning fluid storage tank, a pump, and a circulating heater. The cleaning fluid storage tank has an inlet pipeline and an outlet pipeline. The inlet pipeline is connected to a centrifuge unit, and the outlet pipeline is connected to the pump. The pump has a delivery pipeline connected to the centrifuge unit. The delivery pipeline has a heating branch connected to the cleaning fluid storage tank. The circulating heater is located on the heating branch and is connected to a heat source pipeline. The circulating heater also has a return pipeline connected to the cleaning fluid storage tank.

2. The online cleaning system for centrifuges according to claim 1, characterized in that, Pipeline valves are installed on the inlet pipeline, outlet pipeline, return pipeline, and heating branch.

3. The online cleaning system for centrifuges according to claim 1, characterized in that, The infusion pipeline is equipped with a control valve.

4. The online cleaning system for centrifuges according to claim 3, characterized in that, The infusion pipeline is connected to a sewage treatment pipeline, which is connected between the pump and the control valve.

5. The online cleaning system for centrifuges according to claim 1, characterized in that, A supplementary pipeline is connected to the return pipeline.

6. The online cleaning system for centrifuges according to claim 1, characterized in that, A thermometer is installed on the cleaning fluid storage tank, and an electrically controlled regulating valve group is provided on the heat source pipeline. The electrically controlled regulating valve group is electrically connected to the thermometer.

7. The online cleaning system for centrifuges according to claim 1, characterized in that, The cleaning fluid storage tank is equipped with a pressure gauge and a level gauge.

8. The online cleaning system for centrifuges according to claim 1, characterized in that, The cleaning fluid storage tank is equipped with a tank protection component, which is used to regulate the pressure inside the cleaning fluid storage tank.

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