Vacuum dewatering, drying and filter-pressing system

Abstract

The utility model relates to the technical field of dehydration, in particular to a vacuum dehydration drying filter pressing system which comprises a filter press, a vacuumizing module and a heating module, a filter chamber is formed in the filter press, and the heating module is communicated with the filter press to heat materials in the filter chamber. And the vacuumizing module is communicated with the filter chamber so as to extract gas in the filter chamber. The utility model aims to provide a vacuum dehydration drying filter pressing system aiming at at least one technical problem related in the background technology.

Description

Technical Field

[0001] This application relates to the field of dehydration technology, and more specifically, to a vacuum dehydration and drying pressure filter system. Background Technology

[0002] Coal slime filtration is an essential step in mineral processing. As a core system in the coal washing and beneficiation process of coal preparation plants, the coal slime vacuum dewatering and drying filtration system is mainly used for filtering, dewatering, and pressing coal slime slurry to obtain products such as coal slime cake, thereby improving the utilization rate of coal resources. With the increasing washing and beneficiation volume and the growing requirements for coal slime product quality, the performance requirements of the filter press, as the main equipment in the vacuum dewatering and drying filtration system, are constantly increasing. For coal slime with a high proportion of fine particles and a high content of clay minerals, the filtration effect will be poor.

[0003] When the filter press is working, the slurry is fed into the filter chamber, and then pressing water is introduced to generate high pressure. The filtrate is separated through the filter cloth and discharged from the filtrate outlet. The solids are intercepted on the filter plate. Due to the high proportion of fine materials and the high viscosity of minerals, dewatering is difficult and affects the dewatering effect. Utility Model Content

[0004] The purpose of this application is to provide a vacuum dehydration and drying pressure filter system to address at least one of the technical problems mentioned in the background art.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] This application provides a vacuum dehydration and drying filter press system, including a filter press, a vacuum module, and a heating module. A filter chamber is formed inside the filter press. The heating module is connected to the filter press to heat the material inside the filter chamber. The vacuum module is connected to the filter chamber to extract the gas inside the filter chamber.

[0007] Optionally, the heating module includes a hot water boiler, a hot water tank, and a hot water pump connected in sequence. The hot water pump is connected to the filter press through a hot water inlet pipe, and the hot water boiler is connected to the filter press through a hot water return pipe. A return water valve is installed on the hot water return pipe.

[0008] The beneficial effects of this technical solution are as follows: Under the action of the hot water pump, the hot water is heated by the hot water boiler, sent to the hot water tank for storage, and sent to the filter press through the hot water inlet pipe. The water that has completed heat exchange in the filter press is sent out through the hot water return pipe and flows back to the hot water boiler for reheating.

[0009] Optionally, the vacuum module includes a vacuum pump, a filtrate tank, and a gas-liquid separator. The vacuum pump, the gas-liquid separator, and the filter press are connected in sequence via a steam pipeline, and the gas-liquid separator is connected to the filtrate tank.

[0010] The beneficial effects of this technical solution are as follows: In this way, the vacuum pump extracts water vapor from the filter press through the steam pipeline. The water vapor is pre-cooled and condensed during the flow process. When it passes through the gas-liquid separator, gas-liquid separation is achieved. The separated condensate is sent into the filtrate tank, while the gas is discharged to the outside.

[0011] Optionally, the vacuum module further includes a cooler, and the vacuum pump, the gas-liquid separator, the cooler, and the filter press are connected in sequence via steam pipelines.

[0012] The beneficial effect of this technical solution is that water vapor condenses in large quantities as it flows through the cooler and is discharged into the filtrate pool, thereby reducing the amount of water discharged outdoors and thus reducing the impact on the external environment.

[0013] Optionally, the vacuum module further includes a deodorization device connected to the vacuum pump.

[0014] The beneficial effect of this technical solution is that the gas after most of the water is removed by the gas-liquid separator is deodorized by the deodorization device before being discharged outdoors, thereby reducing the pollution of the discharged gas to the environment.

[0015] Optionally, the vacuum module further includes a first valve and a second valve. The first valve is installed on the steam pipeline and is located upstream of the cooler. The filter press has a filtrate outlet. The steam pipeline is connected to the filtrate outlet. The filtrate tank is connected to the filtrate outlet through a filtrate pipeline. The second valve is installed on the filtrate pipeline.

[0016] The beneficial effects of this technical solution are as follows: When the material in the filter chamber is initially filtered, the first valve is closed and the second valve is opened, allowing the discharged filtrate to smoothly enter the filtrate pool. After the initial filtration is completed, when the material in the filter chamber is heated and vacuumed, the second valve is closed and the first valve is opened, allowing water vapor to enter the cooler through the vacuum pump, and the liquid obtained after separation by the gas-liquid separator flows into the filtrate pool.

[0017] Optionally, the vacuum dehydration and drying filter press system provided in this application further includes a feeding module, which includes a feeding pump and a feeding mixing tank that are interconnected, and the feeding pump is connected to the filter press through a feeding pipeline.

[0018] The beneficial effect of this technical solution is that the material can be mixed evenly in the feed mixing tank and then sent into the filter press by the feed pump.

[0019] Optionally, the feeding module further includes an air compressor and a return valve. The feeding mixing tank is connected to the filter press through a return pipeline. The return valve is installed in the return pipeline, and the air compressor is installed in the feeding mixing tank.

[0020] The beneficial effects of this technical solution are as follows: After the material is fed, the air compressor can generate negative pressure to open the return valve and push the material in the feed pipeline back to the feed mixing tank, which solves the problem of material accumulation and blockage at the feed inlet, reduces material waste, and ensures the continuous operation of the filter press.

[0021] Optionally, the vacuum dehydration and drying filter press system provided in this application further includes a pressing module, which includes a pressing water tank, a pressing pump, and a pressing return water valve. The pressing water tank, the pressing pump, and the filter press are connected in sequence through an inlet pipe. The pressing water tank is connected to the filter press through a return water pipe, and the pressing return water valve is installed on the return water pipe.

[0022] The beneficial effects of this technical solution are as follows: the water stored in the pressing water tank can be sent to the filter press through the pressing pump and the water inlet pipe, and the water that has been pressed in the filter press can be returned to the pressing water tank through the return water pipe.

[0023] Optionally, the pressing water tank is connected to the heating module.

[0024] The beneficial effects of this technical solution are as follows: In this way, the heating module provides a heat source for the drying of coal slime, and at the same time heats the water in the pressing water tank, thereby effectively evaporating the remaining moisture by uniformly heating the coal slime.

[0025] The technical solution provided in this application can achieve at least one of the following beneficial effects:

[0026] The vacuum dehydration and drying filter press system provided in this application involves feeding material into the filter chamber at a certain pressure. Under this pressure, the material undergoes initial filtration within the filter chamber, followed by pressing. Simultaneously, a heating module and a vacuum module operate. The heating module heats the material within the filter chamber, converting the moisture in the material into water vapor. The vacuum module evacuates the filter chamber, removing the generated water vapor. Because the moisture in the material can evaporate at a lower temperature under vacuum conditions, the difficulty of dehydration is greatly reduced. This reduces heat loss and overcomes the problems of low efficiency and severe pollution associated with using a separate drying system for heating the material. Furthermore, it improves the efficiency of moisture evaporation from the material, significantly improving the filter press effect and ultimately greatly enhancing product quality.

[0027] The additional technical features and advantages of this application will become more apparent from the following description or from practical application. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the specific embodiments of this application, the accompanying drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of one embodiment of the vacuum dehydration and drying filter press system provided in this application.

[0030] Figure label:

[0031] 01. Deodorization device; 02. Vacuum module;

[0032] 03. Filtration tank; 04. Second valve;

[0033] 05. Steam piping; 06. Vacuum pump;

[0034] 07. Gas-liquid separator; 08. Cooler;

[0035] 9. First valve; 10. Return pipeline;

[0036] 11. Return valve; 12. Feed mixing tank;

[0037] 13. Feed pump; 14. Feed module;

[0038] 15. Feed pipe; 16. Filter press;

[0039] 17. Heating module; 18. Hot water boiler;

[0040] 19. Hot water tank; 20. Hot water pump;

[0041] 21. Hot water inlet pipe; 22. Hot water return pipe;

[0042] 23. Return water valve; 24. Inlet water pipe;

[0043] 25. Press pump; 26. Press module;

[0044] 27. Press water tank; 28. Press return water valve;

[0045] 29. Return water pipeline; 30. Filtrate pipeline. Detailed Implementation

[0046] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0047] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application 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 application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0048] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0049] like Figure 1 As shown, this application provides a vacuum dehydration and drying filter press system, including a filter press 16, a vacuum module 02 and a heating module 17. A filter chamber is formed in the filter press 16. The heating module 17 is connected to the filter press 16 to heat the material in the filter chamber. The vacuum module 02 is connected to the filter chamber to extract the gas in the filter chamber.

[0050] The vacuum dehydration and drying filter press system provided in this application involves feeding material into the filter chamber at a certain pressure. Under this pressure, the material undergoes initial filtration within the filter chamber, followed by pressing. Simultaneously, the heating module 17 and the vacuum module 02 operate. The heating module 17 heats the material in the filter chamber, converting the moisture in the material into water vapor. The vacuum module 02 evacuates the filter chamber, extracting the generated water vapor. Because the moisture in the material can evaporate at a lower temperature under vacuum conditions, the difficulty of dehydration is greatly reduced. This reduces heat loss and overcomes the problems of low efficiency and severe pollution associated with using a separate drying system to heat the material. Furthermore, it improves the efficiency of moisture evaporation from the material, significantly improving the filter press effect and thus greatly enhancing product quality.

[0051] Optionally, the heating module 17 includes a hot water boiler 18, a hot water tank 19, and a hot water pump 20 connected in sequence. The hot water pump 20 is connected to the filter press 16 via a hot water inlet pipe 21, and the hot water boiler 18 is connected to the filter press 16 via a hot water return pipe 22. A return valve 23 is installed on the hot water return pipe 22. Thus, under the action of the hot water pump 20, hot water is heated by the hot water boiler 18, stored in the hot water tank 19, and then sent to the filter press 16 via the hot water inlet pipe 21. The water that has undergone heat exchange in the filter press 16 is then sent out via the hot water return pipe 22 and returned to the hot water boiler 18 for reheating. Of course, in addition to using hot water to heat the material in the filter press 16, electric heating can also be used to heat the material in the filter press 16. For example, heating wires can be arranged in the inner wall of the chamber filter plates, and electricity can be applied to heat the material in the filter chamber, further evaporating moisture.

[0052] Optionally, the vacuum module 02 includes a vacuum pump 06, a filtrate tank 03, and a gas-liquid separator 07. The vacuum pump 06, the gas-liquid separator 07, and the filter press 16 are connected in sequence via a steam pipeline 05. The gas-liquid separator 07 is connected to the filtrate tank 03. In this way, the vacuum pump 06 extracts water vapor from the filter press 16 through the steam pipeline 05. The water vapor is pre-cooled and condensed during its flow. When it passes through the gas-liquid separator 07, gas-liquid separation is achieved. The separated condensate is sent to the filtrate tank 03, while the gas is discharged outdoors.

[0053] Optionally, the vacuum module 02 further includes a cooler 08. The vacuum pump 06, the gas-liquid separator 07, the cooler 08, and the filter press 16 are connected in sequence via a steam pipeline 05. Water vapor condenses in large quantities as it flows through the cooler 08 and is discharged into the filtrate tank 03, thereby reducing the amount of water discharged outdoors and thus reducing the impact on the external environment.

[0054] Optionally, the vacuum module 02 further includes a deodorization device 01, which is connected to the vacuum pump 06. After most of the water has been removed by the gas-liquid separator 07, the gas is deodorized by the deodorization device 01 before being discharged outdoors, reducing the environmental pollution caused by the discharged gas.

[0055] Optionally, the vacuum module 02 further includes a first valve 09 and a second valve 04. The first valve 09 is installed on the steam pipeline 05 and is located upstream of the cooler 08. The filter press 16 has a filtrate discharge outlet. The steam pipeline 05 is connected to the filtrate discharge outlet. The filtrate pool 03 is connected to the filtrate discharge outlet via a filtrate pipeline 30. The second valve 04 is installed on the filtrate pipeline 30. Thus, when the material in the filter chamber is initially filtered, the first valve 09 is closed and the second valve 04 is opened, allowing the discharged filtrate to smoothly enter the filtrate pool 03. After the initial filtration is completed, when the material in the filter chamber is heated and a vacuum is applied, the second valve 04 is closed and the first valve 09 is opened, allowing water vapor to enter the cooler 08 through the vacuum pump 06. The liquid obtained after separation by the gas-liquid separator 07 flows into the filtrate pool 03.

[0056] Optionally, the vacuum dehydration and drying filter press system provided in this application embodiment further includes a feeding module 14, which includes a feeding pump 13 and a feeding mixing tank 12 that are interconnected. The feeding pump 13 is connected to the filter press 16 through a feeding pipeline 15. In this way, the material can be stirred evenly in the feeding mixing tank 12 and then fed into the filter press 16 by the feeding pump 13.

[0057] Optionally, the feeding module 14 further includes an air compressor and a return valve 11. The feeding mixing tank 12 is connected to the filter press 16 via a return pipeline 10. The return valve 11 is installed in the return pipeline 10, and the air compressor is installed in the feeding mixing tank 12. In this way, after feeding is completed, negative pressure can be generated by the air compressor to open the return valve 11 and push the material in the feeding pipeline 15 back to the feeding mixing tank 12. This solves the problem of material accumulation and blockage at the feed inlet, reduces material waste, and ensures the continuous operation of the filter press 16.

[0058] Optionally, the vacuum dehydration and drying filter press system provided in this application embodiment further includes a pressing module 26. The pressing module 26 includes a pressing water tank 27, a pressing pump 25, and a pressing return water valve 28. The pressing water tank 27, the pressing pump 25, and the filter press 16 are connected in sequence via an inlet pipe 24. The pressing water tank 27 is connected to the filter press 16 via a return water pipe 29, and the pressing return water valve 28 is installed on the return water pipe 29. In this way, the water stored in the pressing water tank 27 can be sent to the filter press 16 through the pressing pump 25 and the inlet pipe 24, and the water that has been pressed in the filter press 16 can return to the pressing water tank 27 through the return water pipe 29.

[0059] Optionally, the pressing water tank 27 is connected to the heating module 17. In this way, the heating module 17 provides a heat source for the drying of coal slime and heats the water in the pressing water tank 27, thereby effectively evaporating the remaining moisture by uniformly heating the coal slime.

[0060] The vacuum dehydration and drying filter press system provided in this application embodiment can also be called a low-temperature vacuum dehydration and drying filter press system. It adds a vacuum module and a heating module to the original ultra-high pressure filter press system. The vacuum module and heating module are independent of each other and work together with each other to further remove moisture on the basis of the original ultra-high pressure system. It uses heat energy to remove moisture that cannot be removed by mechanical force, thereby improving the quality of the product.

[0061] The heating module begins operation when the filter press is started. It consists of a hot water boiler, a hot water tank, a hot water pump, and a hot water return valve, connected to the hot water inlet of each filter plate via pipes. The hot water boiler heats the water and maintains it at a constant temperature. The hot water pump then pumps the hot water into the heating layer to heat the filter chambers. During the flow of hot water into the heating layer, the hot water return valve is also open, allowing the hot water in the heating layer to flow back to the hot water boiler, thus maintaining a constant temperature in the heating layer and continuously heating the filter cake in the filter chambers, causing the moisture in the filter cake to evaporate continuously.

[0062] The vacuum module activates during the water-pressing process of the ultra-high pressure filter press when the filtrate discharge is low. The vacuum module comprises a cooler, a gas-liquid separator, a vacuum pump, and a deodorization device. During feeding, when the filtrate discharge is large, the valve at the filtrate tank is opened, the vacuum valve is closed, and the filtrate flows directly into the filtrate tank by gravity. During diaphragm pressing in the filter press, when the filtrate discharge is low, the vacuum valve is opened, and the filtrate tank valve is closed. The large amount of water vapor generated after the filter cake is heated is extracted by the vacuum pump. The extracted water vapor is condensed by the cooler and flows into the gas-liquid separator, where it separates the water, while the remaining water is purified by the deodorization system before being discharged.

[0063] The vacuum dehydration and drying filter press system provided in this application combines mechanical and thermal dehydration methods. Mechanical dehydration has significant limitations. By introducing a heating module and a vacuum module into the original ultra-high pressure filter press system, some of the moisture that is difficult to remove by mechanical force can be removed. This not only solves the problems of low efficiency and serious pollution caused by using a separate thermal drying system, but also significantly improves the quality of the product.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application 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 therein. 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 application.

Claims

1. A vacuum dehydration and drying pressure filter system, characterized in that, The device includes a filter press, a vacuum module, and a heating module. A filter chamber is formed inside the filter press. The heating module is connected to the filter press to heat the material inside the filter chamber. The vacuum module is connected to the filter chamber to extract the gas inside the filter chamber.

2. The vacuum dehydration and drying pressure filter system according to claim 1, characterized in that, The heating module includes a hot water boiler, a hot water tank, and a hot water pump connected in sequence. The hot water pump is connected to the filter press through a hot water inlet pipe, and the hot water boiler is connected to the filter press through a hot water return pipe. A return valve is installed on the hot water return pipe.

3. The vacuum dehydration and drying pressure filter system according to claim 1, characterized in that, The vacuum module includes a vacuum pump, a filtrate tank, and a gas-liquid separator. The vacuum pump, the gas-liquid separator, and the filter press are connected in sequence via a steam pipeline. The gas-liquid separator is connected to the filtrate tank.

4. The vacuum dehydration and drying pressure filter system according to claim 3, characterized in that, The vacuum module also includes a cooler, and the vacuum pump, the gas-liquid separator, the cooler, and the filter press are connected in sequence via steam pipelines.

5. The vacuum dehydration and drying filter press system according to claim 4, characterized in that, The vacuum module also includes a deodorization device, which is connected to the vacuum pump.

6. The vacuum dehydration and drying pressure filter system according to claim 4, characterized in that, The vacuum module further includes a first valve and a second valve. The first valve is installed on the steam pipeline and is located upstream of the cooler. The filter press has a filtrate outlet. The steam pipeline is connected to the filtrate outlet. The filtrate tank is connected to the filtrate outlet through the filtrate pipeline. The second valve is installed on the filtrate pipeline.

7. The vacuum dehydration and drying pressure filter system according to any one of claims 1 to 6, characterized in that, It also includes a feeding module, which includes a feeding pump and a feeding mixing tank that are connected to each other. The feeding pump is connected to the filter press through a feeding pipeline.

8. The vacuum dehydration and drying pressure filter system according to claim 7, characterized in that, The feeding module also includes an air compressor and a return valve. The feeding mixing tank is connected to the filter press through a return pipeline. The return valve is installed in the return pipeline, and the air compressor is installed in the feeding mixing tank.

9. The vacuum dehydration and drying pressure filter system according to any one of claims 1 to 6, characterized in that, It also includes a pressing module, which includes a pressing water tank, a pressing pump and a pressing return water valve. The pressing water tank, the pressing pump and the filter press are connected in sequence through a water inlet pipe. The pressing water tank is connected to the filter press through a return water pipe and the pressing return water valve is installed on the return water pipe.

10. The vacuum dehydration and drying pressure filter system according to claim 9, characterized in that, The pressing water tank is connected to the heating module.

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