Sludge discharge anti-vibration device of leaf filter

Abstract

According to the anti-vibration device for sludge discharge of the leaf filter, the leaf filter is provided with a tank body, and a sludge discharge valve and a sludge discharge pipeline are mounted at the bottom of the tank body; the anti-vibration device comprises an air storage tank, a one-way valve, a ventilation pipeline and an air pump; the other end of the ventilation pipeline is communicated with one end, close to the sludge discharge valve, of the sludge discharge pipeline; the one-way valve is arranged on the air storage tank and used for introducing air into the air storage tank in a one-way mode. The air pump is connected with the air storage tank, and after the sludge discharging valve is closed, the air pump pumps and presses the sludge discharging pipeline through the air storage tank and the ventilation pipeline. The existence of the vacuum area is the main reason for vibration of the sludge discharge pipeline, and the anti-vibration device can introduce external air into the sludge discharge pipeline, so that the vacuum degree in the sludge discharge pipeline is eliminated, and the sludge discharge valve and the sludge discharge pipeline are prevented from being damaged due to vibration. In addition, the anti-vibration device pumps high-pressure air into the mud discharging pipeline, the mud can be pushed to move downwards to enter the mud groove, and the situation that the mud is stuck in the mud discharging pipeline to block the pipeline due to long-time retention is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of leaf filters, in particular to a mud discharge anti-vibration device for leaf filters. Background Art

[0002] With the rapid development of the domestic alumina industry, the production capacity of alumina production enterprises is also increasing. Leaf filter, as an efficient and practical solid-liquid separation equipment, is widely used in alumina production enterprises.

[0003] The leaf filter is a device that mainly uses pressure and the coordinated work of five valves to filter the filtrate through the filter cloth to achieve solid-liquid separation. In the process of alumina production, the leaf filter needs to open the mud discharge valve and the pressure relief valve to discharge the mud, and discharge the mud in the tank into the mud tank through the mud discharge pipe. Due to the small drop and long distance of the mud discharge pipe and the poor fluidity of the mud, after closing the mud discharge valve, under the action of the gravity of the mud self-flow, a vacuum area is formed at one end of the mud discharge pipe near the mud discharge valve. The existence of this vacuum area will cause two problems: first, the working cycle of the leaf filter is relatively long. After the mud discharge valve is closed, the mud in the mud discharge pipe stops flowing and is easy to stick to the mud discharge pipe and block the pipe; second, when the mud discharge valve is opened again, the release of negative pressure will cause the mud discharge pipe to vibrate violently, causing damage to the mud discharge valve and the mud discharge pipe. The principle is similar to the water hammer phenomenon. Therefore, it is necessary to design a set of devices to eliminate the vacuum area in the mud discharge pipe. Utility Model Content

[0004] In order to overcome the shortcomings of the background technology, the utility model discloses a leaf filter mud discharge anti-vibration device, the leaf filter mud discharge anti-vibration device adopts the following technical solutions:

[0005] A leaf filter machine mud discharge anti-vibration device, the leaf filter machine has a tank body, and a mud discharge valve and a mud discharge pipe are installed at the bottom of the tank body; the anti-vibration device includes an air storage tank, a one-way valve, a ventilation pipe and an air pump; one end of the ventilation pipe is connected to the air storage tank, and the other end is connected to an end of the mud discharge pipe close to the mud discharge valve; the one-way valve is arranged on the air storage tank, and is used to unidirectionally pass air into the air storage tank; the air pump is connected to the air storage tank, and after the mud discharge valve is closed, the air pump pumps air to pressurize the mud discharge pipe through the air storage tank and the ventilation pipe.

[0006] After the implementation of the above technical solution, the installation height of the gas storage tank is higher than the installation height of the mud discharge valve.

[0007] After implementing the above technical solution, an air pressure sensor is installed on the air tank. When the negative pressure in the air tank is greater than the limit value, the air pump pumps air to pressurize the mud discharge pipe through the air tank and the ventilation pipe.

[0008] After implementing the above technical solution, the opening pressure of the one-way valve is less than 0.02MPa.

[0009] After the above technical solution is implemented, the mud discharge valve is a pneumatic control valve, the leaf filter has a control cabinet, and the switch of the mud discharge valve is controlled by the control cabinet.

[0010] After the implementation of the above technical solution, the start and stop of the air pump is controlled by the control cabinet; the air pump automatically starts after the mud discharge valve is closed, and the start time of the air pump is 5-15 minutes.

[0011] Compared with the background technology, the beneficial effects produced by the utility model are:

[0012] The existence of vacuum area in the mud discharge pipe is the main reason for the vibration of the mud discharge valve and the mud discharge pipe. The anti-vibration device can introduce external air into the mud discharge pipe, eliminate the vacuum in the mud discharge pipe, and avoid damage to the mud discharge valve and the mud discharge pipe due to vibration.

[0013] In addition, the anti-vibration device can inject high-pressure air into the mud discharge pipe to push the mud downward into the mud tank, thereby preventing the mud from sticking to the mud discharge pipe and clogging the pipe due to long-term retention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Attached Figure 1 What is shown is the structural schematic diagram of this anti-vibration device.

[0015] Attached Figure 2 The attached Figure 1 A partial enlarged schematic diagram of .

[0016] In the attached figure: 1. tank body; 2. mud discharge valve; 3. mud discharge pipe; 4. mud; 5. gas storage tank; 6. ventilation pipe; 7. air pump; 8. one-way valve; 9. air pressure sensor. DETAILED DESCRIPTION

[0017] 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.

[0018] Attached Figure 1 What is shown is a leaf filter and a mud discharge anti-vibration device. The leaf filter includes a tank body 1 and a high-level tank. A filter cloth is installed in the tank body 1, which is the core for achieving solid-liquid separation. A feed valve, a pressure relief valve, a liquid level balance valve and a mud discharge valve 2 are arranged on the tank body 1, wherein the mud discharge valve 2 is arranged at the bottom of the tank body 1 and connected to the mud discharge pipe 3. The function of the mud discharge pipe 3 is to discharge the mud 4 into a distant mud tank by utilizing the drop. Due to the process layout, the mud discharge pipe 3 is very long and the drop is small, which causes the problems described in the background technology.

[0019] See attached Figure 2 The anti-vibration device is mainly composed of an air storage tank 5, a one-way valve 8, a ventilation pipe 6, and an air pump 7.

[0020] One end of the ventilation pipe 6 is communicated with the gas tank 5, and the other end is communicated with one end of the mud discharge pipe 3 near the mud discharge valve 2. In order to prevent the mud 4 from entering the gas tank 5, the installation height of the gas tank 5 is higher than the installation height of the mud discharge valve 2.

[0021] The air storage tank 5 is a closed cavity in which a certain volume of air is stored. When negative pressure occurs in the mud discharge pipeline 3, the air in the air storage tank 5 enters the mud discharge pipeline 3 through the ventilation pipeline 6, which can reduce the negative pressure in the mud discharge pipeline 3 to a certain extent.

[0022] The one-way valve 8 is arranged on the air storage tank 5, and is used for one-way air flow into the air storage tank 5. The opening pressure of the one-way valve 8 is less than 0.02MPa. When the negative pressure in the mud discharge pipeline 3 is greater than 0.02MPa, the one-way valve 8 opens, and the outside air enters the mud discharge pipeline 3 from the one-way valve 8 through the air storage tank 5 and the ventilation pipeline 6, thereby eliminating the vacuum in the mud discharge pipeline 3.

[0023] The existence of the vacuum area in the mud discharge pipe 3 is the main reason for the vibration of the mud discharge valve 2 and the mud discharge pipe 3. The one-way valve 8 can introduce external air into the mud discharge pipe 3, eliminate the vacuum in the mud discharge pipe 3, and avoid damage to the mud discharge valve 2 and the mud discharge pipe 3 due to vibration.

[0024] In addition, the air pump 7 is connected to the air tank 5. After the mud discharge valve 2 is closed, the air pump 7 pumps air to pressurize the mud discharge pipeline 3 through the air tank 5 and the ventilation pipeline 6.

[0025] After the pressurization, the high-pressure air enters the mud discharge pipe 3, pushing the mud 4 to move downward into the mud tank, thereby preventing the mud 4 from sticking to the mud discharge pipe 3 and blocking the pipe due to long-term retention.

[0026] In order to realize automatic control, the leaf filter has an electrical control cabinet, the mud discharge valve 2 is a pneumatic control valve, and the switch of the mud discharge valve 2 is controlled by the control cabinet. The power supply of the air pump 7 is connected to the control cabinet, and the start and stop of the air pump 7 is also controlled by the control cabinet.

[0027] After the pressure relief and mud discharge are completed, the control cabinet automatically closes the mud discharge valve 2 and simultaneously turns on the air pump 7 to push the mud 4 downward through high-pressure gas. The air pump 7 is turned on for 5-15 minutes, and the air pump 7 is automatically turned off after the mud 4 is discharged into the mud tank.

[0028] In order to prevent the one-way valve 8 from failing, an air pressure sensor 9 is installed on the air tank 5. When the negative pressure in the air tank 5 is greater than the limit value, the air pump 7 pumps air to pressurize the mud discharge pipe 3 through the air tank 5 and the ventilation pipe 6 to avoid a vacuum area in the mud discharge pipe 3.

[0029] 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 leaf filter mud discharge anti-vibration device, the leaf filter having a tank body, a mud discharge valve and a mud discharge pipeline installed at the bottom of the tank body, characterized in that: The anti-vibration device includes an air tank, a one-way valve, a ventilation pipe and an air pump; one end of the ventilation pipe is connected to the air tank, and the other end is connected to an end of the mud discharge pipe close to the mud discharge valve; the one-way valve is arranged on the air tank, and is used to introduce air into the air tank in one direction; the air pump is connected to the air tank, and after the mud discharge valve is closed, the air pump pumps air to pressurize the mud discharge pipe through the air tank and the ventilation pipe.

2. The anti-vibration device for mud discharge of a leaf filter according to claim 1, characterized in that: The installation height of the air storage tank is higher than the installation height of the mud discharge valve.

3. The anti-vibration device for mud discharge of a leaf filter according to claim 1, characterized in that: An air pressure sensor is installed on the air tank. When the negative pressure in the air tank is greater than a limit value, the air pump pumps air to pressurize the mud discharge pipe through the air tank and the ventilation pipe.

4. The anti-vibration device for mud discharge of a leaf filter according to claim 1, characterized in that: The opening pressure of the one-way valve is less than 0.02MPa.

5. The anti-vibration device for mud discharge of a leaf filter according to claim 1, characterized in that: The mud discharge valve is a pneumatic control valve, the leaf filter has a control cabinet, and the switch of the mud discharge valve is controlled by the control cabinet.

6. A leaf filter mud discharge anti-vibration device as claimed in claim 5, characterized in that: The start and stop of the air pump is controlled by the control cabinet; the air pump automatically starts after the mud discharge valve is closed, and the air pump starts for 5-15 minutes.

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