Vacuum belt machine filter cake flushing device and vacuum belt machine assembly

Abstract

The utility model provides a kind of vacuum belt conveyor filter cake flushing device and vacuum belt conveyor assembly, vacuum belt conveyor filter cake flushing device includes: water collecting tank, the top of the water collecting tank is set as opening, the first side plate of the water collecting tank is opened with overflow, the overflow is equal in length with the first side plate, and the overflow is set as high-low undulating end face;Main pipeline, the main pipeline is erected in the opening upper, along the first side plate direction extension, the main pipeline is opened with water inlet and water outlet;Branch pipeline, the branch pipeline is communicated with the water outlet, and extends to the water collecting tank. Adopt the utility model, after flushing water fills water collecting tank, it flows out through high-low undulating overflow, and evenly overflow to the filter cloth of vacuum belt conveyor, filter cake on filter cloth is washed and filtered, the whole overflow process is stably carried out, there is no case that water pressure is too large or too small, ensure the uniformity of filter cake distribution, ensure the washing effect of filter cake.

Description

Technical Field

[0001] This utility model relates to the field of gypsum filter cake rinsing technology, specifically to a vacuum belt conveyor filter cake rinsing device and a vacuum belt conveyor assembly. Background Technology

[0002] In the desulfurization system of power plants, the desulfurized gypsum slurry needs to be dewatered using a vacuum belt conveyor. The dewatered gypsum can then be used as a raw material for building materials. During the operation of the vacuum belt dewatering machine, the gypsum slurry is evenly spread on the filter cloth. Under vacuum, the filtrate passes through the filter cloth and enters the vacuum chamber, while solid particles are trapped on the filter cloth to form a filter cake. To meet the requirements for chloride ion content in the gypsum filter cake, the filter cake is rinsed with filter cake rinsing water during dewatering to remove chloride ions and other impurities.

[0003] In existing technologies, pipes are typically installed above the filter cake, with perforations and nozzles to spray rinsing water directly onto the filter cake. However, the water pressure of the sprayed rinsing water is easily affected by fluctuations in the water pressure within the pipes. Excessive water pressure can cause some of the spread slurry to burst, resulting in uneven distribution of the filter cake and vacuum leakage, leading to substandard gypsum quality. Insufficient water pressure, on the other hand, will result in inadequate rinsing of the filter cake, chloride ion escape, and negatively impact the marketability of the gypsum. Utility Model Content

[0004] In view of this, the present invention provides a filter cake rinsing device and a vacuum belt conveyor assembly for a vacuum belt conveyor to solve the above-mentioned technical problems.

[0005] The vacuum belt conveyor filter cake rinsing device provided by this utility model includes: A water collection tank, the top of which is set as an opening, and the first side plate of the water collection tank is provided with an overflow port, the overflow port being the same length as the first side plate, and the overflow port being set as an undulating end face; The main pipeline is installed above the opening and extends along the direction of the first side plate. The main pipeline has an inlet and an outlet. A branch pipe, which is connected to the outlet and extends into the collection tank.

[0006] Optionally, the vacuum belt conveyor filter cake washing device further includes a support frame, which is fixedly connected to the outer wall of the water collection tank.

[0007] Optionally, the main pipeline has multiple water outlets, which are equally spaced along the extension direction of the main pipeline; The branch pipes are provided in multiple ways, and each branch pipe is connected to a corresponding water outlet.

[0008] Optionally, a main valve is installed on the main pipeline; Each of the branch pipes is equipped with a branch valve.

[0009] Optionally, a flow meter is installed on the main pipeline.

[0010] Optionally, a water pump is installed on the main pipeline.

[0011] Optionally, the vacuum belt conveyor filter cake washing device further includes: A level gauge, wherein the level gauge is installed inside the water collection tank; A controller, wherein the input terminal of the controller is communicatively connected to the output terminal of the level gauge; An alarm, wherein the control terminal of the alarm is communicatively connected to the output terminal of the controller.

[0012] Optionally, the water collection tank is made of stainless steel.

[0013] Optionally, the vacuum belt conveyor filter cake washing device further includes: a water storage tank, which is connected to the water inlet via a water supply pipeline, and a water supply valve is installed on the water supply pipeline.

[0014] This utility model also provides a vacuum belt conveyor assembly, including a vacuum belt conveyor and a filter cake rinsing device as described in any of the above claims, wherein the filter cake rinsing device is installed on the frame of the vacuum belt conveyor.

[0015] The technical solution provided by this utility model has at least the following beneficial effects compared with the prior art: The filter cake rinsing device and vacuum belt conveyor assembly of this utility model are used. After the rinsing water is filled with water collection tank, it flows out through the overflow port with varying heights and overflows evenly onto the filter cloth of the vacuum belt conveyor to rinse and filter the filter cake on the filter cloth. The entire overflow process is stable and there is no situation where the water pressure is too high or too low, which ensures the uniformity of the filter cake distribution and the rinsing effect of the filter cake. Attached Figure Description

[0016] Figure 1 This is a perspective structural diagram of a vacuum belt conveyor filter cake washing device according to an embodiment of the present invention; Figure 2 for Figure 1 The side view of the filter cake rinsing device of the vacuum belt conveyor shown; Figure 3 for Figure 1 The diagram shows the filter cake washing device of the vacuum belt conveyor used in conjunction with the filter cloth of the vacuum belt conveyor. Figure 4 for Figure 3 The top view shown; Figure 5 for Figure 4 A magnified view of a portion at point A shown.

[0017] Figure label: 1: Water collection tank; 2: Main pipe; 3: Branch pipe; 4: Overflow port; 5: Support frame; 6: Filter cloth. Detailed Implementation

[0018] The embodiments of this utility model will be further described below with reference to the accompanying drawings. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the purpose of simplifying the description of this utility model. They do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0019] Figure 1 This is a perspective structural diagram of a vacuum belt conveyor filter cake washing device according to an embodiment of the present invention; Figure 2 for Figure 1 The side view of the filter cake rinsing device of the vacuum belt conveyor shown; Figure 3 for Figure 1 The diagram shows the filter cake washing device of the vacuum belt conveyor used in conjunction with the filter cloth of the vacuum belt conveyor. Figure 4 for Figure 3 The top view shown; Figure 5 for Figure 4 A magnified view of a portion at point A shown.

[0020] like Figures 1-5 As shown, the vacuum belt conveyor filter cake washing device includes a water collection tank 1, a main pipe 2, and a branch pipe 3. The top of the water collection tank 1 is set as an opening, and the first side plate of the water collection tank 1 has an overflow port 4. The overflow port 4 is the same length as the first side plate, and the overflow port 4 is set as an undulating end face. The main pipe 2 is erected above the opening and extends along the direction of the first side plate. The main pipe 2 has an inlet and an outlet. The branch pipe 3 is connected to the outlet and extends into the water collection tank 1.

[0021] In use, the water collection tank 1 is fixed to the frame of the vacuum belt conveyor, with the first side plate of the water collection tank 1 facing the filter cloth 6 and in close contact with the filter cloth 6. The overflow port 4 on the first side plate is slightly higher than the height of the filter cloth 6. When the vacuum belt conveyor is running normally, the filter cake is evenly spread on the filter cloth 6. When the filter cake needs to be rinsed, the main pipe 2 is connected to the rinsing water source, and rinsing water is injected into the main pipe 2. The rinsing water enters the branch pipe 3 through the main pipe 2 and then enters the water collection tank 1 through the branch pipe 3. When the height of the rinsing water injected into the water collection tank 1 reaches the height of the overflow port 4, the rinsing water flows down the filter cloth 6 through the overflow port 4, rinsing the filter cake on the filter cloth 6. Moreover, the overflow port 4 is designed with an undulating end face, so that the rinsing water can flow down evenly along the undulating end face without the instantaneous water flow being too large or too small.

[0022] The filter cake washing device for vacuum belt conveyors of this utility model is used. After the water collection tank 1 is filled with washing water, it flows out through the overflow port 4 with varying heights and overflows evenly onto the filter cloth 6 of the vacuum belt conveyor to wash and filter the filter cake on the filter cloth 6. The entire overflow process is stable and there is no situation where the water pressure is too high or too low, which ensures the uniformity of the filter cake distribution and the washing effect of the filter cake.

[0023] like Figures 1-5 As shown, in this embodiment, the water collection tank 1 is configured as a hollow cuboid with an open top surface, and the first side plate is one of the side plates extending along the direction of the water collection tank 1. In this embodiment, it is... Figure 1 The left side plate of the central water collection tank 1 is lower than all other side plates, thus forming an overflow port 4 at its top. The top end face of this overflow port has an undulating shape. After the water collection tank 1 is filled with water, the flushing water overflows from the top of the lowest side plate, i.e., through the overflow port 4, and flows onto the filter cloth 6 that is tightly fitted to the first side plate. In this embodiment, the end face of the overflow port 4 is set as a serrated shape with undulating edges, or it can be set as a wavy shape with undulating edges. The main pipe 2 is installed above the opening of the water collection tank 1, horizontally, and extends in the same direction as the length of the water collection tank 1. One end of the main pipe 2 has an inlet, which is connected to the flushing water source via a pipeline. In this embodiment, the inlet of the main pipe 2 is connected to the process water pipeline. The side of the main pipe 2 facing the opening of the water collection tank 1 has an outlet. The branch pipe 3 is vertically installed, with its upper end connected to the outlet and its lower end extending into the water collection tank 1 through an opening. Depending on the actual application, the overflow port 4 may not be located at the top of the first side plate. Depending on the height of the filter cloth 6 of the vacuum belt conveyor, the overflow port 4 may also be located at other heights on the first side plate. The specific shape and size of the water collection tank 1 may also be adjusted.

[0024] Optionally, the vacuum belt conveyor filter cake washing device also includes a support frame 5, which is fixedly connected to the outer wall of the water collection tank 1. The support frame 5 enables the overall connection of the vacuum belt conveyor filter cake washing device to the frame of the vacuum belt conveyor. Compared to directly fixing the water collection tank 1 to the frame, the support frame 5 provides a more flexible connection.

[0025] like Figures 1-4 As shown, in this embodiment, the support frame 5 consists of two cuboid plates, which are fixedly connected to the opposite side walls of the water collection tank 1 along its extension direction. The height of the support frame 5 is greater than the height of the water collection tank 1, so that after the two support frames 5 are fixed to the water collection tank 1, the water collection tank 1 is suspended in the air. Depending on the actual application, the specific structural form of the support frame 5 can be adjusted to facilitate connection with the vacuum conveyor frame. The specific fixed connection height between the water collection tank 1 and the support frame 5 can also be adjusted to accommodate filter cloths 6 of different heights. This ensures that after the support frame 5 is fixed to the vacuum conveyor frame, the first side plate can tightly abut against the filter cloth 6. Simultaneously, the filter cloth 6 can be located within an appropriate height range below the overflow port 4, allowing the flushing water in the water collection tank 1 to overflow through the overflow port 4 and flow smoothly to the filter cloth 6, rinsing the filter cake on the filter cloth 6.

[0026] Optionally, the main pipe 2 has multiple outlets, which are evenly spaced along the extension direction of the main pipe 2; multiple branch pipes 3 are provided, and each branch pipe 3 is connected to one of the multiple outlets. This arrangement allows flushing water to be injected into the water collection tank 1 simultaneously through multiple branch pipes 3, improving the water injection efficiency. Furthermore, the evenly spaced branch pipes 3 help maintain a consistent liquid level in the water collection tank 1, thereby ensuring the uniformity and stability of the flushing water flowing out through the overflow port 4.

[0027] like Figures 1-4 As shown in this embodiment, the main pipe 2 has multiple outlets spaced apart on the side facing the water collection tank 1. Correspondingly, multiple branch pipes 3 are also provided. The distance between any two adjacent branch pipes 3 is equal. The upper end of each branch pipe 3 is connected to an outlet, and the lower end extends into the water collection tank 1. The number of outlets on the main pipe 2 and the number of branch pipes 3 can be adjusted according to the actual application.

[0028] Optionally, a main valve (not shown) is installed on the main pipe 2; a branch valve (not shown) is installed on each branch pipe 3. By opening and closing the main valve, the flow of flushing water into the collection tank 1 can be controlled, and by adjusting the number of branch valves opened, the rate at which flushing water is injected into the collection tank 1 can be controlled.

[0029] When the filter cake needs to be rinsed, open the main valve and the branch valves to allow rinsing water to enter the collection tank 1. Once the collection tank 1 is full and overflows through the overflow port 4, to reduce the overflow flow, close an appropriate number of branch valves to decrease the instantaneous water volume entering the collection tank 1. After rinsing is complete, close the main valve to stop the rinsing water injection. Depending on the application, the main valve and branch valves can be manual or electric.

[0030] Optionally, a flow meter (not shown) is installed on the main pipeline 2. Based on operational experience or test data, after the water collection tank 1 is filled with flushing water and overflows through the overflow port 4, in order to achieve a better flushing effect on the filter cake, there is an optimal range for the instantaneous flow rate of the flushing water flowing through the main pipeline 2. Installing a flow meter allows for real-time and intuitive observation of the instantaneous flow rate of the flushing water. When the instantaneous flow rate exceeds the maximum value of the optimal range, the opening of the main valve can be appropriately reduced; when the instantaneous flow rate is lower than the minimum value of the optimal range, the opening of the main valve can be appropriately increased.

[0031] Optionally, a water pump (not shown) is installed on the main pipe 2. The water pump can be activated to increase the flow rate of the flushing water when the pressure of the flushing water source is low and the water flow through the main pipe 2 is too slow.

[0032] Optionally, the vacuum belt conveyor filter cake washing device also includes a level gauge, a controller, and an alarm. The level gauge is installed inside the water collection tank 1; the input terminal of the controller is communicatively connected to the output terminal of the level gauge; and the control terminal of the alarm is communicatively connected to the output terminal of the controller.

[0033] The level gauge monitors the real-time water level in the collection tank 1 and transmits the data to the controller. The controller receives the water level data and compares it with the preset height data. When the water level is lower than the preset height, it indicates that the water in the collection tank 1 has not reached the overflow port 4 and cannot overflow onto the filter cloth 6, thus preventing normal rinsing and filtration of the filter cake on the filter cloth 6. This may indicate a blockage in the main pipe 2 or branch pipe 3. In this case, the controller activates an alarm to alert personnel to investigate immediately. The preset height is the height between the inner wall of the bottom of the collection tank 1 and the overflow port 4. The controller's control logic for triggering the alarm based on changes in the received water level data can be implemented using existing mature algorithms, and its specific working principle will not be elaborated here. The alarm can be either an audible alarm or a visual alarm.

[0034] Optionally, the water collection tank 1 may be made of stainless steel. Using stainless steel prevents the water collection tank 1 from rusting and extends its service life. Specifically, the water collection tank 1 may be made of 316 stainless steel.

[0035] Optionally, the vacuum belt conveyor filter cake rinsing device also includes a water storage tank (not shown), which is connected to the water inlet via a water supply pipeline, and a water supply valve is installed on the water supply pipeline. When the water source for rinsing water to the collection tank 1 is unexpectedly unable to supply water, the water supply valve is opened, and the water storage tank supplies rinsing water to the collection tank 1, ensuring the continuity of the filter cake rinsing process.

[0036] This utility model also provides a vacuum belt conveyor assembly, including a vacuum belt conveyor and a filter cake rinsing device as described in any of the above embodiments, wherein the filter cake rinsing device is installed on the frame of the vacuum belt conveyor.

[0037] Using the vacuum belt conveyor assembly of this utility model, after the rinsing water fills the water collection tank 1, it flows out through the overflow port 4 with varying heights and overflows evenly onto the filter cloth 6 of the vacuum belt conveyor to rinse and filter the filter cake on the filter cloth 6. The entire overflow process is stable and there is no situation where the water pressure is too high or too low, which ensures the uniformity of the filter cake distribution and the rinsing effect of the filter cake.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A filter cake washing device for a vacuum belt conveyor, characterized in that, include: A water collection tank, the top of which is set as an opening, and the first side plate of the water collection tank is provided with an overflow port, the overflow port being the same length as the first side plate, and the overflow port being set as an undulating end face; The main pipeline is installed above the opening and extends along the direction of the first side plate. The main pipeline has an inlet and an outlet. A branch pipe, which is connected to the outlet and extends into the collection tank.

2. The vacuum belt conveyor filter cake washing device according to claim 1, characterized in that, Also includes: A support frame is fixedly connected to the outer wall of the water collection tank.

3. The vacuum belt conveyor filter cake washing device according to claim 1 or 2, characterized in that: The main pipeline has multiple water outlets, which are equally spaced along the extension direction of the main pipeline. The branch pipes are provided in multiple ways, and each branch pipe is connected to a corresponding water outlet.

4. The vacuum belt conveyor filter cake washing device according to claim 3, characterized in that: A main valve is installed on the main pipeline; Each of the branch pipes is equipped with a branch valve.

5. The vacuum belt conveyor filter cake washing device according to claim 4, characterized in that: A flow meter is installed on the main pipeline.

6. The vacuum belt conveyor filter cake washing device according to claim 1 or 2, characterized in that: A water pump is installed on the main pipeline.

7. The vacuum belt conveyor filter cake washing device according to claim 1 or 2, characterized in that, Also includes: A level gauge, wherein the level gauge is installed inside the water collection tank; A controller, wherein the input terminal of the controller is communicatively connected to the output terminal of the level gauge; An alarm, wherein the control terminal of the alarm is communicatively connected to the output terminal of the controller.

8. The vacuum belt conveyor filter cake washing device according to claim 1 or 2, characterized in that: The water collection tank is made of stainless steel.

9. The vacuum belt conveyor filter cake washing device according to claim 1 or 2, characterized in that, Also includes: A water storage tank is connected to the water inlet via a water supply pipeline, and a water supply valve is installed on the water supply pipeline.

10. A vacuum belt conveyor assembly, comprising a vacuum belt conveyor and a filter cake rinsing device as described in any one of claims 1-9, wherein the filter cake rinsing device is mounted on the frame of the vacuum belt conveyor.

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