Solid-liquid raw material separating and filtering device

Abstract

The utility model relates to a solid-liquid raw material separating and filtering device which comprises a tank body, a blowing assembly, a vacuum valve, a pressure release valve and a filtering assembly, the filtering assembly comprises a filtering bag and is installed in the tank body, an upper sealing cover is installed at the top end of the tank body, a discharging sealing cover is installed on the bottom end face of the tank body, and the vacuum valve and the pressure release valve are installed on the upper sealing cover. A feeding valve is further installed on the upper sealing cover, a powder discharging valve and a liquid discharging valve are installed on the discharging sealing cover, the feeding valve and the powder discharging valve are both communicated with the inner space of the filtering bag, the liquid discharging valve is communicated with the filtering liquid space outside the filtering assembly, and the blowing assembly comprises an air inlet pipe and a blowing pipe. Powder filtered by the device is located in the filtering assembly, liquid is located outside the filtering assembly, the powder can be prevented from being attached to the inner wall of the tank body, the device is provided with the blowing assembly for blowing the filtering bag, the filtering efficiency can not be affected in long-time use, and the device further has the advantages of being small in damage degree to powder particles and low in loss in the separating and filtering process.

Description

Technical Field

[0001] The utility model relates to a filtering device, in particular to a solid-liquid raw material separation filtering device. Background Art

[0002] In the chemical industry, it is often necessary to separate and filter powder particles from liquids in industries such as non-ferrous metal cleaning, liquid filtration, and powder cleaning and transportation. At present, the industry mainly uses external filtration vibration and vacuum screen filtration to filter and separate solid and liquid raw materials.

[0003] The external filter vibration type is to filter the liquid with powder through the outside of the filter element, and the powder remains on the outer wall of the filter element. The liquid enters the inner part through the filter bag and is then extracted. The powder particles remaining outside the bag are scattered by vibration, but the powder outside the bag will adhere to the inner wall of the tank. The vibration scattering process will still stick to the wall. The powder scattered by vibration is scattered and difficult to collect and discharge. After long-term use, some powder will accumulate on the tank wall and is difficult to discharge. Therefore, the external filter vibration method has the disadvantages of difficult collection of powder and low collection efficiency.

[0004] Vacuum screen filtration is done at the far end of the discharge, by means of vacuuming, using negative pressure to suck the liquid into the filter. The filter is divided into upper and lower parts by the screen. The upper part isolates the powder particles, and then the powder is discharged by rotating and squeezing; the liquid is discharged from the lower part through the screen. However, due to the characteristics of the powder particles and the structure of the equipment, large amounts of agglomerated powder particles are easy to clog the screen and be squeezed and deformed. After long-term use, the screen will stick to the wall and accumulate a lot, affecting the use effect of the equipment and production and transportation. Therefore, the vacuum screen filtration method has the disadvantages of easily causing powder particles to accumulate on the inner wall, easily blocking the screen, and easily causing extrusion damage to the powder particles, increasing operating and maintenance costs, and affecting production.

[0005] It can be seen that the above separation and filtration methods will have problems such as low filtration efficiency, large impact on filtration accuracy, low powder particle collection degree, and easy blockage, wall adhesion and powder particle extrusion deformation during long-term use. Therefore, it is necessary to improve the filtration method to make the powder more efficient during the filtration process, reduce material loss, and reduce extrusion damage to the powder. Summary of the invention

[0006] The technical problem to be solved by the utility model is: to provide a solid-liquid raw material separation and filtration device, through which the powder filtered is located in the filter component, and the liquid is located outside the filter component, which can prevent the powder from adhering to the inner wall of the tank body, and the device is provided with a blowing component to spray the filter bag, which can not affect the filtration efficiency during long-term use, and also has the advantages of little damage to powder particles and low loss during the separation and filtration process.

[0007] The technical solution to solve the above technical problems is: a solid-liquid raw material separation and filtering device, comprising a tank body, a blowing assembly, a vacuum valve, a pressure relief valve and a filtering assembly, the filtering assembly comprising a filter bag, the filter assembly is installed in the tank body, an upper sealing cover is installed on the top of the tank body, and a lower material sealing cover is installed on the bottom of the tank body, the vacuum valve and the pressure relief valve are installed on the upper sealing cover, a feed valve is also installed on the upper sealing cover, a powder discharge valve and a liquid discharge valve are installed on the lower material sealing cover, the feed valve and the powder discharge valve are both connected to the internal space of the filter bag, a filtered liquid space is formed between the outside of the filter bag and the tank body, the liquid discharge valve is connected to the filtered liquid space, the blowing assembly comprises at least two air inlet pipes and a plurality of blowing pipes arranged up and down on the air inlet pipe, the air inlet pipe passes through the upper sealing cover and extends into the filtered liquid space of the tank body, and the blowing pipe is located in the filtered liquid space of the tank body.

[0008] Furthermore, the filter assembly also includes an outer frame and an inner frame, the filter bag is located between the outer frame and the inner frame, a bag clamping throat clamp 1 is provided below the upper cover, and a bag clamping throat clamp 2 is provided above the unloading cover, and the top and bottom ends of the filter bag are clamped and fixed by bag clamping throat clamp 1 and bag clamping throat clamp 2 respectively.

[0009] Furthermore, a nitrogen valve is also provided on the upper cover.

[0010] Furthermore, a liquid level gauge is installed on the outside of the tank body, and a flange sight glass is also provided on the upper cover.

[0011] Furthermore, the spray assembly includes two air inlet pipes, each of which has four spray pipes evenly arranged in an upper and lower arrangement, and the air inlet pipes are symmetrically arranged on both sides of the filter assembly.

[0012] Due to the adoption of the above technical solution, the utility model has the following beneficial effects:

[0013] 1. The feed valve and powder discharge valve of this device are both connected to the internal space of the filter bag, and the liquid discharge valve is connected to the filtered liquid space outside the filter bag, that is, the powder filtered by this device is located inside the filter assembly, and the liquid is located outside the filter assembly, which can prevent the powder from sticking to the wall and agglomerating, and is not damaged by hitting the wall, making the powder easier to collect and reducing powder loss. Compared with the liquid and powder separated by external filtration vibration, the filtration of this device improves the filtration efficiency and the collection rate of powder solids, reduces the risk of powder solid loss, improves the recovery rate of powder solid particles, and reduces the equipment use, maintenance and production costs.

[0014] 2. The filter assembly is composed of an outer frame, a filter bag and an inner frame. The filter assembly is installed by upper and lower fixing and sealing devices, so that the filter bag in the filter assembly can easily maintain its shape during the spraying process, the inner and outer frames and filter bags are easy to replace, and the liquid and powder are better separated.

[0015] 3. Compared with the vacuum screen filtration method, this device can maintain high-precision filtration for a long time, with an accuracy range of 0.2-0.5 microns, and avoid damage caused by collision and extrusion of powder particles, reduce the loss of powder and solid particles, and improve the yield rate in powder and solid cleaning, which is beneficial to ensure the quality of separation and filtration.

[0016] 4. The spray assembly provides nitrogen to spray and beat the filter bags, which reduces the failure rate of equipment use, makes maintenance easier, and saves maintenance and repair costs.

[0017] 5. Positive pressure-assisted gravity discharging is used to convey powder solids, which is conducive to use in specific places such as explosion-proof.

[0018] 6. The device has a simple structure and adopts a negative pressure and positive pressure power source design, which is easy to repair, maintain and replace. It has low manufacturing cost, low maintenance cost, high capture efficiency and better separation and filtration effect.

[0019] The technical features of a solid-liquid raw material separation and filtration device of the utility model are further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 : Schematic diagram of the solid-liquid raw material separation and filtration device of the present invention.

[0021] Figure 2 : A partial enlarged view of the filter assembly of the present invention.

[0022] Figure 3 : Schematic diagram of the working state of feed filtration of the utility model.

[0023] Figure 4 : Schematic diagram of the working state of the utility model of blowing and beating.

[0024] In the figure: 1-liquid level meter, 2-upper cover, 3-blowing assembly, 31-inlet pipe, 32-blowing pipe, 4-feeding valve, 5-vacuum valve, 6-pressure relief valve, 7-nitrogen valve, 8-flange sight glass, 9-bag clamp throat clamp 1, 10-filter assembly, 101-inner frame, 102-filter bag, 103-external frame, 11-tank body, 12-unloading cover, 13-liquid discharge valve, 14-powder discharge valve, 15-support foot, 16-bag clamp throat clamp 2.

[0025] P1-liquid, P2-powder. DETAILED DESCRIPTION Embodiment 1:

[0026] A solid-liquid raw material separation and filtration device, such as Figure 1-Figure 2As shown, it includes a tank body 11, a spray assembly 3, a vacuum valve 5, a pressure relief valve 6 and a filter assembly 10, wherein the filter assembly 10 includes a filter bag 102, and the filter assembly 10 is installed in the tank body 11. An upper cover 2 is installed at the top of the tank body 11, and a lower material cover 12 is installed at the bottom of the tank body. The vacuum valve 5 and the pressure relief valve 6 are installed on the upper cover 2, and a feed valve 4 is also installed on the upper cover 2. A powder discharge valve 14 and a liquid discharge valve 13 are installed on the lower material cover 12. The feed valve 4 and the powder discharge valve 14 are both connected to the internal space of the filter bag 102. A filtering liquid space is formed between the outside of the filter bag 102 and the tank body 11, and the liquid discharge valve 13 is connected to the filtering liquid space. The blowing assembly 3 includes two air inlet pipes 31 and four blowing pipes 32 arranged up and down and evenly distributed on each air inlet pipe, and a valve for controlling air intake. The air inlet pipe 31 extends through the upper cover into the filtering liquid space of the tank body. The two air inlet pipes 31 are symmetrically arranged on both sides of the filter assembly 10. The blowing pipe 32 is located in the filtering liquid space of the tank body, and the blowing pipe 32 faces the filter bag 102 for blowing gas into the filter bag.

[0027] In this embodiment, the filter assembly 10 further includes an outer frame 103 and an inner frame 101. The upper end of the outer frame is detachably mounted on the upper cover 2. The upper and lower ends of the inner frame 101 are detachably mounted on the upper cover 2 and the feed cover 12. The filter bag 102 is located between the outer frame and the inner frame. A bag clamping throat hoop 1 9 is provided below the upper cover, and a bag clamping throat hoop 2 16 is provided above the feed cover. The top and bottom ends of the filter bag 102 are clamped and fixed by the bag clamping throat hoop 1 9 and the bag clamping throat hoop 2 16. The outer frame 103 and the inner frame 101 play a role in protecting the filter bag 102, so that the filter bag can maintain a normal filtering state during the filtering process. The inside-out filtering method (internal filtering) can avoid the situation where the powder and liquid materials deposited at the bottom are not fully filtered, compared with the outside-in filtering method (external filtering). It has a longer service life, high filtration efficiency, good precision guarantee, good filtration effect, high powder collection efficiency, positive pressure assistance and vertical gravity effect, which makes it easy to discharge and transport.

[0028] In this device, the tank body has covers on the upper and lower ends. The upper end is mainly for feeding and air intake, and the lower end is for discharging and air outlet. The filter assembly arranged inside can be removed for cleaning, and the filter bag can be replaced. A flange sealing ring is designed under the cover, so that the cover has good sealing performance when it is tightened. A fixed filter assembly device is also arranged at the bottom of the tank body, and an O-ring is used for sealing to prevent the powder particles inside the filter assembly from leaking out.

[0029] In this embodiment, the upper cover is also provided with a nitrogen valve 7, which is a one-way valve for filling nitrogen into the tank body to protect the raw materials with nitrogen. A liquid level gauge 1 is also installed outside the tank body, and a flange sight glass 8 is also provided on the upper cover.

[0030] In this embodiment, nitrogen is introduced into the spraying assembly, and the filter bag is hit by nitrogen spraying to shake off the powder particles. The tank forms a suitable positive pressure to promote the flow of powder inside the filter assembly. The powder is discharged through the powder discharge valve and transported to the designated area. Nitrogen replenishment is provided on the top of the filter assembly to maintain positive pressure. At the same time, it has self-cleaning and purging capabilities. The powder unloading effect is better than that of the screen-type suction filter, and the spraying inside the filter bag causes less damage to the powder particles.

[0031] As a variation, the number and arrangement positions of the air inlet pipes 31 and the blowing pipes 32 constituting the blowing assembly may be adjusted and varied according to actual conditions.

[0032] Working process: The initial state of the device is that the liquid discharge valve, powder discharge valve, and spray assembly are in a closed state, and the internal nitrogen is filled in a suitable positive pressure protection state. Operation process: Open the nitrogen valve → Close the nitrogen valve after filling → Start vacuuming → Open the feed valve → The powder-containing liquid enters the filter assembly for filtration and precipitation → Open the liquid discharge valve to convey the filtered liquid → Close the liquid discharge valve after the liquid is completely pumped out → Close the vacuum valve → Open the spray assembly valve for nitrogen blowing and beating → Close the spray assembly valve → Open the powder discharge valve → Open the nitrogen valve → Close the powder discharge valve → Liquid and powder separation is completed.

[0033] The specific operation process is: open the nitrogen valve, fill the tank with nitrogen for protection, open the vacuum valve, and start the remote vacuum machine to evacuate the inside of the tank. At this time, the feed valve is opened, and the powder-containing liquid enters the filter assembly. After observing that the liquid is full through the flange sight glass and the liquid level gauge, close the feed valve. At this time, the liquid seeps through the filter bag, and the powder particles are isolated on the inner wall of the filter bag, and part of them settle at the bottom by gravity. The seeped liquid is transported to the designated area through the liquid discharge valve through the pipeline. After the liquid is removed, close the liquid discharge valve, turn off the vacuum, open the valve of the spray assembly, and the gas enters the spray pipe through the air inlet pipe. The spray pipe sprays the gas to the outer wall of the filter bag, so that the filter bag is vibrated and beaten, and the powder particles attached to the inner surface of the filter bag fall into the bottom of the filter bag to be discharged. Since nitrogen is sprayed into the tank through the spray assembly, the tank forms a positive pressure. At this time, open the powder discharge valve, and the powder particles are pressed into the pipeline due to gravity and positive pressure and are transported. The nitrogen valve at the top of the filter assembly is inlet, and the powder particles are appropriately assisted in the discharge of the powder particles. Observe through the flange sight glass and close the powder discharge valve after separation and filtration is completed.

Claims

1. A solid-liquid raw material separation and filtration device, characterized in that: The invention comprises a tank body (11), a blowing assembly (3), a vacuum valve (5), a pressure relief valve (6) and a filter assembly (10), wherein the filter assembly comprises a filter bag (102), the filter assembly is installed in the tank body, an upper cover (2) is installed at the top of the tank body, and a lower cover (12) is installed at the bottom of the tank body, the vacuum valve and the pressure relief valve are installed on the upper cover, a feed valve (4) is also installed on the upper cover, and a powder discharge valve (14) and a liquid discharge valve (13) are installed on the lower cover, the feed valve and the powder discharge valve are both connected to the internal space of the filter bag, a filtered liquid space is formed between the outside of the filter bag and the tank body, and the liquid discharge valve is connected to the filtered liquid space, the blowing assembly (3) comprises at least two air inlet pipes (31) and a plurality of blowing pipes (32) arranged vertically on the air inlet pipes, the air inlet pipes pass through the upper cover and extend into the filtered liquid space of the tank body, and the blowing pipes are located in the filtered liquid space of the tank body.

2. A solid-liquid raw material separation and filtration device according to claim 1, characterized in that: The filter assembly (10) further comprises an outer frame (103) and an inner frame (101), the filter bag (102) being located between the outer frame and the inner frame, a bag clamping throat hoop (9) being provided below the upper cover, and a bag clamping throat hoop (16) being provided above the discharge cover, the top and bottom ends of the filter bag being clamped and fixed by the bag clamping throat hoop (1) and the bag clamping throat hoop (2) respectively.

3. A solid-liquid raw material separation and filtration device according to claim 1 or 2, characterized in that: The upper cover is also provided with a nitrogen valve (7).

4. A solid-liquid raw material separation and filtration device according to claim 1 or 2, characterized in that: A liquid level meter (1) is also installed on the outside of the tank body, and a flange sight glass (8) is also provided on the upper cover.

5. A solid-liquid raw material separation and filtration device according to claim 1 or 2, characterized in that: The spray assembly (3) comprises two air inlet pipes (31), each air inlet pipe having four spray pipes (32) evenly arranged in an upper and lower arrangement, and the air inlet pipes are symmetrically arranged on both sides of the filter assembly.

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