Constant-temperature heating type movable disc type vacuum filter

Abstract

The utility model relates to the field of vacuum filters, in particular to a constant-temperature heating type movable disc vacuum filter, which comprises a frame and reciprocating filter cloth, a feed port is arranged above the filter cloth, and a filter disc for containing filtrate is arranged below the filter cloth. One end of the filter cloth is provided with a driving device enabling the filter cloth to move along the supporting roller and a discharging device used for cleaning filter residues, the filter disc is communicated with a suction filtration assembly used for sucking filtrate, a heat preservation box is further arranged below the filter cloth, and the filter cloth enters the heat preservation box after passing through the discharging device and under the action of the guide roller. According to the utility model, the loss of self activity caused by temperature drop of materials in the filtering process can be effectively prevented.

Description

Technical Field

[0001] The utility model relates to the field of vacuum filters, in particular to a constant temperature heating type mobile disc vacuum filter. Background Art

[0002] Disc vacuum filter is a continuous vacuum filtration equipment, which can be used in metallurgy, mineral processing, coal and other industries, mainly used for raw material extraction or solid-liquid separation. When such equipment is used to purify or separate materials in the chemical, pharmaceutical, food and other industries, it often encounters temperature-sensitive materials. During the operation of conventional disc vacuum filter, the material will usually reduce the temperature of the filtered material due to heat transfer between the material and the ambient temperature and the filter cloth, filter disc and other components. However, the reduction in material temperature will affect its own physical properties, causing the material to lose its original activity characteristics.

[0003] Chinese invention patent application CN110898518A discloses a vacuum belt filter with steam heating function. The above invention patent application discloses a scheme of adding a steam heating device to the vacuum belt filter. The steam heating device includes a mounting bracket, the mounting bracket is fixed on the frame, the mounting bracket is provided with a steam hood, the steam hood is arranged above the filter bin, a steam distribution plate is provided between the steam hood and the filter bin, a plurality of steam outlets are evenly distributed on the steam distribution plate, and a steam inlet connected to a steam source is provided on the top of the steam hood. The filter cake is steam-heated by steam, so that the residual water and a small amount of colloid in the filter cake can be effectively removed, greatly improving the dehydration efficiency. The above invention patent uses the scheme of directly heating the filter cake by steam, although it can avoid the temperature drop of the material, but its main purpose is to use high-temperature steam heating to reduce the adhesion of free water in the gap of the filter cake, so that it can be dehydrated more efficiently. In addition, the direct contact between the high-temperature steam and the material in the above disclosed scheme is not conducive to maintaining the activity of the material under high-temperature state. Therefore, we also need to solve the technical problem of not reducing the temperature of the material during the filtration process on the premise that the activity of the filtered material is not lost. Utility Model Content

[0004] Technical purpose: In order to overcome the deficiencies in the prior art, the utility model provides a constant temperature heating type mobile disc vacuum filter.

[0005] Technical solution: To achieve the above-mentioned purpose, the utility model discloses a constant temperature heating mobile disc vacuum filter, including a frame and a reciprocating filter cloth, a feed inlet is provided above the filter cloth, a filter disc for receiving the filtrate is provided below the filter cloth, a driving device for displacing the filter cloth along a supporting drum and a discharge device for cleaning the filter residue are provided at one end of the filter cloth, the filter disc is connected to a suction filter assembly for sucking the filtrate, and an insulation box is also provided below the filter cloth, and the filter cloth enters the insulation box after the discharge device via the guide roller.

[0006] Preferably, the side wall of the heat preservation box is provided with an overflow port connected to the overflow pipe, and a plurality of groups of limiting rollers are provided inside the heat preservation box. The height value of the overflow port from the bottom of the heat preservation box is defined as A, and the height value of the filter cloth from the bottom of the heat preservation box after being guided by the limiting roller is defined as B. <A。

[0007] Preferably, the insulated box is also provided with a filling port connected to an external water supply pump, and a drain port for discharging sewage is provided at the bottom thereof, and the insulated box is also provided with a temperature detection device.

[0008] Preferably, a heating coil for heating the filter cloth is provided in the filter disc, and an air hood for heat preservation is provided above the filter cloth corresponding to the filter disc.

[0009] Preferably, the heating coil is provided with an inlet and an outlet, the inlet is close to an outlet end of the filter cloth, and the outlet is close to an inlet end of the filter cloth.

[0010] Preferably, the gas hood is provided with an observation window and a steam discharge port, and the suction filtration assembly is provided with a vacuum pump and a steam-water separation tank.

[0011] The beneficial effects of the utility model are:

[0012] 1. After the filter cloth is unloaded, it will enter the insulation box for preheating through the guide roller during operation. The insulation box is usually filled with hot water from the water level to the overflow port. The limit roller controls the height of the filter cloth below the water level, so that the filter cloth can fully exchange heat with the hot water during the process of traveling, increase the temperature of the filter cloth itself, and prevent the temperature of the filter cloth from being too low when receiving the material, resulting in a drop in the temperature of the material and thus losing its activity.

[0013] 2. After the filter cloth is connected to the material, during the filtration process, high-temperature steam or high-temperature water is passed through the heating coil in the filter plate to achieve heat exchange between the heating coil and the ambient temperature, filter cloth, filter plate and other components during the material filtration process. This can prevent temperature drop during material filtration and avoid contact between high-temperature heat source and material, which helps to maintain the activity of the material itself.

[0014] 3. The air hood above the filter cloth can effectively prevent internal heat dissipation, reduce heat energy consumption, and play a role in heat insulation. The steam exhaust port on the top can discharge the steam generated during filtrate filtration according to operational needs.

[0015] 4. The flow direction of high-temperature steam or high-temperature water in the heating coil is opposite to the running direction of the filter cloth, which helps to achieve more complete heat exchange during the heat exchange process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1It is a three-dimensional diagram of the overall structure of the utility model;

[0017] Figure 2 This is a cross-sectional view of the overall structure of the utility model;

[0018] Figure 3 It is a side view of the overall structure of the utility model;

[0019] Figure 4 This is a top view of the overall structure of the utility model;

[0020] Figure 5 This is the front view of the filter disc in the utility model;

[0021] Figure 6 This is a top view of the filter disc in the utility model.

[0022] In the figure, 1. frame; 2. filter cloth; 3. filter plate; 4. driving device; 5. unloading device; 6. feeding port; 7. filtration assembly; 8. insulation box; 9. supporting roller; 10. guide roller; 11. overflow port; 12. limiting roller; 13. heating coil; 14. inlet; 15. outlet; 16. filtration interface; 17. air hood; 18. observation window; 19. steam discharge port. DETAILED DESCRIPTION

[0023] The following is combined with Figure 1 To Attachment Figure 6 The principles and features of the present invention are described, and the examples given are only used to explain the present invention, and are not used to limit the scope of the present invention.

[0024] A constant temperature heating type mobile disc vacuum filter, such as Figure 1 — Figure 6 As shown, it includes a frame 1 and a reciprocating filter cloth 2, a filtrate inlet 6 is provided above the filter cloth 2, a filter plate 3 for receiving the filtrate is provided below the upper filter cloth 2, a heat preservation box 8 is provided below the lower filter cloth 2, a driving device 4 for displacing the filter cloth along a supporting roller 9 and a discharge device 5 for cleaning filter residue are provided at one end of the filter cloth 2, the filter cloth 2 is connected end to end, reciprocates through the driving device 4, and enters the heat preservation box 8 after the discharge device 5 through the guide roller 10.

[0025] The incubator 8 is provided with a filling port connected to an external water supply pump. The water supply pump can pump hot water into the incubator 8. In this embodiment, the temperature of the hot water in the incubator 8 is 80 °C. The incubator 8 is provided with a temperature detection device, such as temperature measuring elements like a thermometer and a temperature sensor. An overflow port 11 connected to an overflow pipe is provided on the side wall of the incubator 8. The hot water level in the incubator 8 is always below the position of the overflow port. When the water level is too high, the hot water automatically flows out, and when the water level is too low, the water supply pump supplies water to it, so as to ensure an effective water level height in the incubator 8. Define the height value from the overflow port 11 to the bottom of the incubator 8 as A, and define the height value from the filter cloth 2 to the bottom of the incubator 8 after being guided by the limiting roller 12 as B. It is necessary to ensure that B < A, so that the filter cloth 2 is always completely immersed in the hot water for sufficient preheating after being guided by multiple groups of limiting rollers 12 inside the incubator 8. When the preheated filter cloth 2 runs to the feeding port 6, it contacts the filtrate, avoiding excessive temperature drop of the filtrate and causing changes in the activity of the material. A drain port for discharging sewage is also provided at the bottom of the incubator 8.

[0026] In order to further avoid the temperature drop of the material, a heating coil 13 for heating the filter cloth 2 is provided inside the filter disk 3. Usually, a heat exchange medium is passed through the heating coil 13. The heat exchange medium is usually high-temperature steam or high-temperature water. Through heat exchange, components such as the filter cloth 2 and the filter disk 3 can be heated, reducing the temperature drop of the filtrate during the filtration process, keeping the activity of the material unchanged, and also avoiding the weakening of the activity caused by the direct heating of the filtrate by high-temperature steam resulting in too high a temperature. In order to enable the heat exchange medium in the heating coil 13 to fully exchange heat with the environment, the inlet 14 of the heating coil 13 is close to the discharging end of the filter cloth 2, and the outlet 15 is close to the feeding end of the filter cloth 2. The flow direction of the heat exchange medium in the heating coil 13 is opposite to the movement displacement direction of the filter cloth 2. In order to reduce the ineffective heat exchange between the filtrate and the outside during the filtration process and reduce the loss of heat energy, a gas hood 17 for heat insulation is provided above the corresponding filter cloth 2 of the filter disk 3. The gas hood 17 is provided with an observation window 18 and a steam discharge port 19. The switch of the steam discharge port 19 can be controlled according to the characteristics of the filtrate to discharge the ineffective hot steam in the gas hood 17. The suction filtration assembly 7 is provided with a vacuum pump and a steam-water separation tank. By connecting with the suction filtration interface 16, a vacuum area is formed at the bottom of the filter disk 3, facilitating the discharge of the liquid in the filter disk 3.

[0027] Working principle of the utility model: during the working process, 80°C hot water is stored in the insulation box 8, and the filter cloth 2 is driven by the driving device 4, and enters the insulation box 8 and is immersed in the hot water for preheating through the action of the guide roller 10 and the limit roller 12. The preheated filter cloth 2 moves to the bottom of the feed port 6 and contacts with the filtrate. The heating coil 13 in the filter disc 3 below the filter cloth 2 is passed with high-temperature steam, and the heating coil 13 performs heat exchange to heat the filter disc 3 and the filter cloth 2 carrying the filtrate and other components. The filtrate is continuously filtered as the filter cloth 2 moves, and because of the heating of the heating coil 13 and the heat insulation and heat preservation effect of the air hood 17, the temperature sensitive material can be prevented from having a significant temperature drop during the filtration process, so that it remains active. The filtered material is separated from the filter cloth 2 by the action of the unloading device 5, and the filter cloth 2 enters the insulation box 8 again for preheating. The filtrate in the filter disc 3 is emptied by the vacuum action of the suction filter assembly 7, and the filter cloth 2 continues to circulate and operate continuously.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A constant temperature heating type mobile disc vacuum filter, comprising a frame (1) and a reciprocating filter cloth (2), wherein an inlet (6) is provided above the filter cloth (2), and a filter disc (3) for receiving filtrate is provided below the filter cloth (2), a driving device (4) for moving the filter cloth along a supporting drum (9) and a discharge device (5) for cleaning filter residue are provided at one end of the filter cloth (2), and the filter disc (3) is connected to a suction filter assembly (7) for sucking filtrate, characterized in that: A heat preservation box (8) is also provided below the filter cloth (2), and the filter cloth (2) enters the heat preservation box (8) after the unloading device (5) via the action of a guide roller (10).

2. The constant temperature heating type mobile disc vacuum filter according to claim 1, characterized in that: The side wall of the heat preservation box (8) is provided with an overflow port (11) connected to the overflow pipe, and a plurality of groups of limiting rollers (12) are provided inside the heat preservation box (8). The height value of the overflow port (11) from the bottom of the heat preservation box (8) is defined as A, and the height value of the filter cloth (2) from the bottom of the heat preservation box (8) after being guided by the limiting rollers (12) is defined as B. <A。 3. The constant temperature heating type mobile disc vacuum filter according to claim 2, characterized in that: The heat preservation box (8) is also provided with a filling port connected to an external water supply pump, and a drain port for discharging sewage is provided at its bottom. The heat preservation box (8) is also provided with a temperature detection device.

4. The constant temperature heating type mobile disc vacuum filter according to claim 1, characterized in that: A heating coil (13) for heating the filter cloth (2) is provided in the filter disc (3), and an air hood (17) for heat preservation is provided above the filter cloth (2) corresponding to the filter disc (3).

5. The constant temperature heating type mobile disc vacuum filter according to claim 4, characterized in that: The heating coil (13) is provided with an inlet (14) and an outlet (15), wherein the inlet (14) is close to an outlet end of the filter cloth (2), and the outlet (15) is close to an inlet end of the filter cloth (2).

6. The constant temperature heating type movable disc vacuum filter according to claim 4, characterized in that: The gas hood (17) is provided with an observation window (18) and a steam discharge port (19), and the suction filtration assembly (7) is provided with a vacuum pump and a steam-water separation tank.

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