Vacuum self-adaptive liquid level adjusting device of vertical disc filter

Abstract

A vacuum self-adaptive liquid level adjusting device of a vertical disc filter comprises a pulp inlet pipe, an ore pulp tank and an overflow tank, the ore pulp tank is connected with the overflow tank through an overflow pipe, and the pulp inlet pipe is used for adding ore pulp into the ore pulp tank; a gate valve A is arranged on the slurry inlet pipe, a gate valve B is arranged on the overflow pipe, and a vacuum cylinder is connected between the gate valve A and the gate valve B; the vacuum cylinder is provided with a cylinder body, a piston rod, a vacuum access port and a pressure spring, two ends of the piston rod are respectively connected with a gate of the gate valve A and a gate of the gate valve B, and the vacuum access port is connected with a vacuum system of the vertical disc filter; when the vacuum degree of the vertical disc filter is increased, the piston rod moves towards one side of the gate valve A, the opening degree of the gate valve A is reduced, and the opening degree of the gate valve B is increased; when the vacuum degree of the vertical disc filter is reduced, the piston rod moves towards one side of the gate valve B, the opening degree of the gate valve B is reduced, the opening degree of the gate valve A is increased, the liquid level of the ore pulp tank is kept stable, and the dewatering efficiency of the vertical disc filter is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vertical disc filters, in particular to a vacuum self-adaptive liquid level regulating device for vertical disc filters. Background Art

[0002] The vertical disc filter is a concentrate dehydration equipment. Its working principle is to use vacuum to filter out the water in the concentrate slurry to obtain a filter cake containing the concentrate. The filter disc in the vertical disc filter rotates at a constant speed. When the output of the concentrate is greater than the processing capacity of the vertical disc filter, the slurry will accumulate in the slurry tank and exceed the working liquid level, causing the slurry to overflow. When the output of the concentrate is less than the processing capacity of the vertical disc filter, the liquid level of the slurry tank will drop even if the feed valve is fully opened. At this time, the vacuum degree of the system will decrease rapidly due to the large amount of air inhaled by the filter disc, seriously affecting the dehydration efficiency of the vertical disc filter. Therefore, it is necessary to design a device to adjust the liquid level of the slurry tank according to the vacuum degree to solve the above problems. Utility Model Content

[0003] In order to overcome the deficiencies in the background technology, the utility model discloses a vacuum adaptive liquid level regulating device for a vertical disc filter, the purpose of which is to regulate the liquid level of a slurry tank according to the vacuum degree of the system to improve the dehydration efficiency of the vertical disc filter.

[0004] Specifically, the utility model adopts the following technical solutions:

[0005] A vacuum self-adaptive liquid level regulating device for a vertical disc filter comprises a slurry inlet pipe, a slurry tank and an overflow tank, wherein the slurry tank and the overflow tank are connected via an overflow pipe, and the slurry inlet pipe is used to add slurry into the slurry tank; a gate valve A is arranged on the slurry inlet pipe, a gate valve B is arranged on the overflow pipe, and a vacuum cylinder is connected between the gate valve A and the gate valve B; the vacuum cylinder comprises a cylinder body, a piston rod, a vacuum access port and a compression spring, wherein two ends of the piston rod are respectively connected to the gates of the gate valve A and the gate valve B, and the vacuum access port is connected to the vacuum system of the vertical disc filter; when the vacuum degree of the vertical disc filter increases, the piston rod moves toward the gate valve A side, reduces the opening of the gate valve A, and increases the opening of the gate valve B; when the vacuum degree of the vertical disc filter decreases, the piston rod moves toward the gate valve B side, reduces the opening of the gate valve B, and increases the opening of the gate valve A.

[0006] To further improve the technical solution, a slurry feeding pipe is provided in the overflow tank, and a water pump and a valve are provided on the slurry feeding pipe; when the vacuum degree of the vertical disc filter decreases, the slurry in the overflow tank is pumped into the slurry tank through the slurry feeding pipe.

[0007] To further improve the technical solution, the grouting pipe is connected to the slurry inlet pipe through a tee.

[0008] To further improve the technical solution, the vertical disc filter is provided with a negative pressure sensor, and the water pump and the valve are connected to the control system; when the negative pressure sensor senses that the negative pressure of the vacuum system is less than a limit value, the control system opens the water pump and the valve.

[0009] To further improve the technical solution, the piston rod divides the cylinder into a negative pressure chamber and a normal pressure chamber, a vacuum inlet and a compression spring are arranged on the negative pressure chamber, and a vent hole is arranged on the normal pressure chamber.

[0010] To further improve the technical solution, the capacity of the overflow tank is 0.2-0.4 times the capacity of the slurry tank.

[0011] After implementing the above technical solution, compared with the background technology, the beneficial effects produced by the utility model are:

[0012] The liquid level regulating device can automatically regulate the liquid level of the slurry tank according to the vacuum degree of the system. When the vacuum degree of the vertical disc filter increases, the piston rod moves to the side of the gate valve A, reducing the opening of the gate valve A and increasing the opening of the gate valve B; when the vacuum degree of the vertical disc filter decreases, the piston rod moves to the side of the gate valve B, reducing the opening of the gate valve B and increasing the opening of the gate valve A, so that the liquid level of the slurry tank remains stable, thereby improving the dehydration efficiency of the vertical disc filter.

[0013] In addition, the liquid level regulating device is also provided with an overflow trough and an overflow pipe. When the output of the concentrate is less than the processing capacity of the disc filter, the slurry in the overflow trough is pumped into the slurry tank to quickly increase the liquid level of the slurry tank; when the output of the concentrate is greater than the processing capacity of the disc filter, the overflow trough can be used to accommodate excess slurry. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Attached Figure 1 What is shown is the overall structural schematic diagram of the liquid level regulating device.

[0015] Attached Figure 2 Shown is a schematic diagram of the structure of the vacuum cylinder.

[0016] Attached Figure 3 The diagram shows the movement state of the piston rod when the system vacuum degree increases.

[0017] Attached Figure 4 The diagram shows the movement state of the piston rod when the system vacuum degree decreases.

[0018] In the attached figure: 1, filter plate; 2, slurry tank; 3, overflow tank; 4, slurry inlet pipe; 5, overflow pipe; 6, gate valve A; 7, gate valve B; 8, vacuum cylinder; 81, cylinder body; 82, piston rod; 83, vacuum inlet; 84, compression spring; 85, vent hole; 9, slurry feeding pipe; 10, water pump; 11, valve. DETAILED DESCRIPTION

[0019] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. It should be noted that in the description of the present invention, the terms "front", "rear", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of description, rather than indicating or implying that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. It should also be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0020] See attached Figure 1 A vacuum self-adaptive liquid level regulating device for a vertical disc filter includes a slurry inlet pipe 4, a slurry tank 2 and an overflow tank 3. The slurry tank 2 and the overflow tank 3 are connected by an overflow pipe 5. The slurry inlet pipe 4 is used to add slurry into the slurry tank 2. A gate valve A6 is provided on the slurry inlet pipe 4, a gate valve B7 is provided on the overflow pipe 5, and a vacuum cylinder 8 is connected between the gate valve A6 and the gate valve B7. The structure and function thereof are described in detail below.

[0021] Specifically, the capacity of the overflow tank 3 is 0.2-0.4 times the capacity of the slurry tank 2. The function of the overflow tank 3 is that when the output of the concentrate is greater than the processing capacity of the disc filter, the excess slurry can enter the overflow tank 3 through the overflow pipe 5 to ensure that the liquid level of the slurry tank 2 remains unchanged.

[0022] See attached Figure 2 , attached Figure 2 The figure shows the schematic diagram of the vacuum cylinder. Figure 2 It can be seen that the vacuum cylinder 8 is composed of a cylinder body 81, a piston rod 82, a vacuum inlet 83 and a compression spring 84, wherein the piston rod 82 divides the cylinder body 81 into a negative pressure chamber and a normal pressure chamber, the vacuum inlet 83 and the compression spring 84 are arranged on the negative pressure chamber, the vacuum inlet 83 is connected to the vacuum system of the vertical disc filter, and a vent hole 85 is arranged on the normal pressure chamber, and the vent hole 85 is used to balance the normal pressure chamber with the external air pressure. The negative pressure connected to the vacuum inlet 83 will generate an upward thrust on the piston rod 82, and the compression spring 84 will generate a downward thrust on the piston rod 82 until the negative pressure and the compression spring 84 form a balance.

[0023] See attached Figure 3 , attached Figure 3 The figure shows the motion state of the piston rod when the system vacuum increases. Figure 3 It can be seen that the upper and lower ends of the piston rod 82 are connected to the gates of the gate valve A6 and the gate valve B7 respectively. When the vacuum degree of the vertical disc filter increases, the slurry will accumulate in the slurry tank 2 and exceed the working liquid level. At this time, under the action of the system vacuum degree, the piston rod 82 moves to the side of the gate valve A6, reducing the opening of the gate valve A6, increasing the opening of the gate valve B7, and reducing the liquid level of the slurry tank 2.

[0024] See attached Figure 4 , attached Figure 4 The figure shows the motion state of the piston rod when the system vacuum degree decreases. Figure 4 It can be seen that when the vacuum degree of the vertical disc filter decreases, the piston rod 82 moves toward the gate valve B7 under the action of the system vacuum degree, reducing the opening of the gate valve B7 and increasing the opening of the gate valve A6. At this time, the liquid level of the slurry tank 2 begins to rise. In this way, the liquid level of the slurry tank 2 can be adjusted according to the vacuum degree of the system, so that the slurry can immerse the filter disc 1, thereby improving the dehydration efficiency of the vertical disc filter.

[0025] To further improve the technical solution, a slurry feeding pipe 9 is provided in the overflow tank 3, and a water pump 10 and a valve 11 are provided on the slurry feeding pipe 9. In this embodiment, the slurry feeding pipe 9 is connected to the slurry inlet pipe 4 through a tee. When the vacuum degree of the vertical disc filter decreases, or the output of the concentrate is less than the processing capacity of the vertical disc filter, the slurry in the overflow tank 3 is pumped into the slurry tank 2 through the slurry feeding pipe 9, and the liquid level of the slurry tank 2 can be quickly increased.

[0026] To further improve the technical solution, the vertical disc filter is provided with a negative pressure sensor (not shown in the figure), and the water pump 10 and the valve 11 are connected to the control system. When the negative pressure sensor senses that the negative pressure of the vacuum system is less than the limit value, the control system turns on the water pump 10 and the valve 11 to pump the slurry in the overflow tank 3 into the slurry tank 2. Obviously, such a design does not require manual opening of the water pump 10 and the valve 11, thereby improving the automation level of the vertical disc filter.

[0027] As can be seen from the above, the liquid level regulating device can automatically adjust the liquid level of the slurry tank 2 according to the vacuum degree of the system, so that the slurry can immerse the filter disc 1, thereby improving the dehydration efficiency of the vertical disc filter. In addition, the liquid level regulating device is also provided with an overflow tank 3 and an overflow pipe 5. When the output of the concentrate is less than the processing capacity of the vertical disc filter, the slurry in the overflow tank 3 is pumped into the slurry tank 2 to quickly increase the liquid level of the slurry tank 2. When the output of the concentrate is greater than the processing capacity of the vertical disc filter, the overflow tank 3 can be used to accommodate excess slurry.

[0028] Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the protection scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A vacuum self-adaptive liquid level regulating device for a vertical disc filter, characterized in that: It includes a slurry inlet pipe, a slurry tank and an overflow tank. The slurry tank and the overflow tank are connected by an overflow pipe. The slurry inlet pipe is used to add slurry into the slurry tank. A gate valve A is arranged on the slurry inlet pipe, a gate valve B is arranged on the overflow pipe, and a vacuum cylinder is connected between the gate valve A and the gate valve B. The vacuum cylinder has a cylinder body, a piston rod, a vacuum inlet and a compression spring, wherein the two ends of the piston rod are respectively connected to the gates of the gate valve A and the gate valve B, and the vacuum inlet is connected to the vacuum system of the vertical disc filter. When the vacuum degree of the vertical disc filter increases, the piston rod moves to the side of the gate valve A, reduces the opening of the gate valve A, and increases the opening of the gate valve B; when the vacuum degree of the vertical disc filter decreases, the piston rod moves to the side of the gate valve B, reduces the opening of the gate valve B, and increases the opening of the gate valve A.

2. A vacuum self-adaptive liquid level regulating device for a vertical disc filter as claimed in claim 1, characterized in that: A slurry feeding pipe is arranged in the overflow tank, and a water pump and a valve are arranged on the slurry feeding pipe; when the vacuum degree of the vertical disc filter decreases, the slurry in the overflow tank is pumped into the slurry tank through the slurry feeding pipe.

3. A vacuum self-adaptive liquid level regulating device for a vertical disc filter as claimed in claim 2, characterized in that: The grouting pipe is connected to the slurry inlet pipe through a tee.

4. A vacuum self-adaptive liquid level regulating device for a vertical disc filter as claimed in claim 2 or 3, characterized in that: The vertical disc filter is provided with a negative pressure sensor, and the water pump and the valve are connected to the control system; when the negative pressure sensor senses that the negative pressure of the vacuum system is less than the limit value, the control system opens the water pump and the valve.

5. The vacuum self-adaptive liquid level regulating device for a vertical disc filter according to claim 1, characterized in that: The piston rod divides the cylinder into a negative pressure chamber and a normal pressure chamber. The vacuum inlet and the compression spring are arranged on the negative pressure chamber, and the normal pressure chamber is provided with a vent hole.

6. A vacuum self-adaptive liquid level regulating device for a vertical disc filter as claimed in claim 1, characterized in that: The capacity of the overflow tank is 0.2-0.4 times the capacity of the slurry tank.

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