Forward covering and pressurizing device of filter

Abstract

The upper surface of a working belt of a belt type vacuum filter is a filtering working face, materials needing to be filtered are discharged at one end of the filtering working face and move along with the working belt, and liquid is continuously absorbed by negative pressure of a vacuum box. The filtering working surface is sequentially provided with a blanking section, a filtering section and an unloading section on the working length of the working belt, materials sequentially pass through the three working sections, a covering and pressurizing device is arranged at the rear section of the filtering section and is provided with a pressurizing surface which is synchronously arranged with the working belt, and a pressurizing gap is formed between the pressurizing surface and the working belt; the material passes through the pressurized gap and liquid therein is discharged. The filtering section is a main working section in the solid-liquid separation process, the covering and pressurizing device is arranged on the rear section of the filtering section, the liquid separation efficiency can be effectively improved, the covering and pressurizing device mainly operates in the forward direction of a working belt, the pressurized pressure is kept stable, and the separation quality of single-time filtering is improved.

Description

Technical Field

[0001] The utility model relates to a device for improving the filtering efficiency of a filter, in particular to a positive covering pressurizing device for a filter. Background Art

[0002] A belt-type vacuum filter is a negative pressure material passing device with a circulating working belt. The working belt includes a rubber belt and a woven belt, and moves synchronously on a vacuum box. The vacuum box generates vacuum negative pressure below the working belt, sucks the liquid into the vacuum box, and realizes solid-liquid separation. Therefore, the existing filter mainly separates solid and liquid through negative pressure. However, the efficiency of negative pressure separation is low for some materials with high water content and strong solid adsorption. A common operation is to filter the material through the filter multiple times, which increases processing time and reduces work efficiency. Therefore, a device is needed to improve the filtration efficiency of materials with high water content. Utility Model Content

[0003] The purpose of the utility model is to overcome the above-mentioned shortcomings in the prior art and to provide a positive covering pressurizing device for a filter.

[0004] The technical solution adopted by the utility model to solve the above-mentioned problem is: the upper surface of the working belt of the belt vacuum filter is the filtering working surface, the material to be filtered is discharged at one end of the filtering working surface, and moves with the working belt and is continuously absorbed by the negative pressure of the vacuum box. The filtering working surface is sequentially provided with a feeding section, a filtering section and a discharging section on the working length of the working belt, and the material passes through the three working sections in sequence. A covering pressurizing device is provided at the rear section of the filtering section, and the covering pressurizing device has a pressurizing surface synchronously provided with the working belt, and a pressurizing gap is formed between the pressurizing surface and the working belt, and the material passes through the pressurizing gap and the liquid therein is discharged. The filtering section is the main working section of the solid-liquid separation process, and the covering pressurizing device is provided at its rear section to effectively improve the separation efficiency of the liquid. The covering pressurizing device mainly runs in the positive direction with the working belt to keep the pressurized pressure stable, thereby improving the separation quality of a single filtration.

[0005] Furthermore, the covering pressure device includes an upper pressure roller group and a pressure belt, the upper pressure roller group includes multiple groups of pressure rollers, each group of pressure rollers includes a guide frame, a roller frame and a pressure cylinder, the guide frame is vertically fixed on the filter frame, multiple rollers are fixed on the roller frame, the roller frame moves up and down along the guide frame and is driven by the pressure cylinder to apply pressure downward, the pressure belt is driven by the tape roller to circulate, and its lower straight section passes under the pressure roller group and runs in the same direction as the working belt. The pressure surface formed by the pressure roller group is larger, the pressure process of the material is longer, and the liquid separation effect is better. The pressure belt can evenly disperse the pressure of the upper pressure roller group, and the material is squeezed more flat.

[0006] Furthermore, a lower support roller is arranged below the covering pressure device, and the lower support roller includes a fixed base frame and a support roller body. The lower support roller is located below the working belt as a whole, and the fixed base frame is arranged horizontally and a plurality of support roller bodies are arranged transversely thereon. All the support roller bodies form a support surface and support below the working belt, and the fixed base frame is fixed on the filter frame. The lower support roller can support the bottom of the working belt, improve the quality of pressurized filtration, and prevent the working belt from being deformed due to long-term pressure.

[0007] Furthermore, the fixed chassis is provided with a roller end slot hole opening upward, the shaft end of the support roller body is installed in the roller end slot hole, and the support roller body moves and leaves the fixed chassis. Since the support roller body needs to bear the pressure and the weight of the working belt, it is easy to deform after working for a long time, so the roller end slot hole is provided to facilitate the replacement of the support roller body.

[0008] Furthermore, the front section of the filter section is provided with a material guide device, which includes a height fixing frame, on which a guide plate is provided, the guide plate is provided across the width of the working belt, the guide plate is provided in an inclined direction in the running direction of the working belt, and the surface height is gradually reduced. The material guide device controls the laying thickness of the material, so that the negative pressure absorption effect is better and it is more conducive to pressurization.

[0009] Compared with the prior art, the utility model has the following advantages and effects: the design is an improvement on the filtering structure of a belt filter, mainly by setting a pressurizing structure on the main working surface of the filter, thereby increasing the filtering effect on materials that are not easy to dehydrate, improving the single filtering efficiency, and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the overall structure of the filter.

[0011] Figure 2 It is a schematic diagram of the structure of the covering pressurizing device.

[0012] Figure 3 It is a structural schematic diagram of a material diversion device.

[0013] In the figure: 1, working belt, 2, unloading section, 3, filtering section, 4, unloading section, 5, covering pressure device, 6, pressure surface, 7, upper pressure roller group, 8, pressure belt, 9, guide frame, 10, roller frame, 11, pressure cylinder, 12, lower support roller, 13, fixed base frame, 14, support roller body, 15, roller end slot, 16, material guide device, 17, height fixing frame, 18, guide plate. DETAILED DESCRIPTION

[0014] The present invention will be further described in detail below with reference to the accompanying drawings and through examples. The following examples are provided to explain the present invention, but the present invention is not limited to the following examples.

[0015] A positive covering and pressurizing device for a filter, wherein the upper surface of a working belt 1 of a belt vacuum filter is a filtering working surface, the material to be filtered is discharged at one end of the filtering working surface, moves with the working belt 1 and is continuously absorbed by the negative pressure of a vacuum box, the filtering working surface is provided with a feeding section 2, a filtering section 3 and a discharging section 4 in sequence on the working length of the working belt 1, the material passes through the three working sections in sequence, a covering and pressurizing device 5 is provided at the rear section of the filtering section 3, the covering and pressurizing device 5 has a pressurizing surface 6 which is synchronously provided with the working belt 1, a pressurizing gap is formed between the pressurizing surface 6 and the working belt 1, the material passes through the pressurizing gap and the liquid therein is discharged.

[0016] The covering pressure device 5 includes an upper pressure roller group 7 and a pressure belt 8. The upper pressure roller group 7 includes multiple groups of pressure rollers. Each group of pressure rollers includes a guide frame 9, a roller frame 10 and a pressure cylinder 11. The guide frame 9 is vertically fixed on the filter frame. Multiple rollers are fixed on the roller frame 10. The roller frame 10 moves up and down along the guide frame 9 and is driven by the pressure cylinder 11 to apply pressure downward. The pressure belt 8 is driven by the tape roller to circulate, and its lower straight section passes under the pressure roller group and runs in the same direction as the working belt 1.

[0017] A lower support roller 12 is arranged relatively below the covering and pressurizing device 5, and the lower support roller 12 includes a fixed base frame 13 and a support roller body 14. The lower support roller 12 is located below the working belt 1 as a whole. The fixed base frame 13 is horizontally arranged and multiple support roller bodies 14 are transversely arranged thereon. All support roller bodies 14 form a supporting surface and are supported below the working belt 1. The fixed base frame 13 is fixed on the filter frame.

[0018] The fixed base frame 13 is provided with a roller end slot hole 15 opening upward, and the shaft end of the supporting roller body 14 is installed in the roller end slot hole 15 , and the supporting roller body 14 moves and separates from the fixed base frame 13 .

[0019] The front section of the filtration section 3 is provided with a material guide device 16, which includes a height fixing frame 17, on which a guide plate 18 is provided. The guide plate 18 is arranged across the width of the working belt 1, and the guide plate 18 is inclined in the running direction of the working belt 1 and gradually reduces the surface height.

[0020] It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary rather than restrictive. The scope of the present invention is defined by the claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim involved.

[0021] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A positive covering pressurizing device for a filter, characterized in that: The upper surface of the working belt (1) of the belt vacuum filter is a filtering working surface. The material to be filtered is discharged at one end of the filtering working surface and moves with the working belt (1) and is continuously absorbed by the negative pressure of the vacuum box. The filtering working surface is provided with a discharge section (2), a filtering section (3) and a discharge section (4) in sequence on the working length of the working belt (1). The material passes through the three working sections in sequence. A covering pressurizing device (5) is provided at the rear section of the filtering section (3). The covering pressurizing device (5) has a pressurizing surface (6) which is synchronously provided with the working belt (1). A pressurizing gap is formed between the pressurizing surface (6) and the working belt (1). The material passes through the pressurizing gap and The liquid is discharged therefrom, the covering pressure device (5) comprises an upper pressure roller group (7) and a pressure belt (8), the upper pressure roller group (7) comprises a plurality of groups of pressure rollers, each group of pressure rollers comprises a guide frame (9), a roller frame (10) and a pressure cylinder (11), the guide frame (9) is vertically fixed on the filter frame, a plurality of rollers are fixed on the roller frame (10), the roller frame (10) moves up and down along the guide frame (9) and is driven by the pressure cylinder (11) to apply pressure downward, the pressure belt (8) is driven by the tape roller to circulate, and its lower straight section passes under the pressure roller group and runs in the same direction relative to the working belt (1).

2. The filter forward covering pressurizing device according to claim 1, characterized in that: A lower support roller (12) is arranged below the covering and pressurizing device (5), and the lower support roller (12) includes a fixed base frame (13) and a support roller body (14). The lower support roller (12) is located below the working belt (1) as a whole. The fixed base frame (13) is arranged horizontally and a plurality of support roller bodies (14) are arranged transversely thereon. All the support roller bodies (14) form a support surface and are supported below the working belt (1). The fixed base frame (13) is fixed on a filter frame.

3. The filter positive covering pressurizing device according to claim 2, characterized in that: The fixed base frame (13) is provided with a roller end slot hole (15) opening upward, the shaft end of the supporting roller body (14) is installed in the roller end slot hole (15), and the supporting roller body (14) moves and separates from the fixed base frame (13).

4. The filter positive covering pressurizing device according to claim 1, characterized in that: The front section of the filtering section (3) is provided with a material guide device (16), the material guide device (16) comprises a height fixing frame (17), a guide plate (18) is arranged on the height fixing frame (17), the guide plate (18) is arranged across the width of the working belt (1), the guide plate (18) is arranged to be inclined in the running direction of the working belt (1), and the surface height is gradually reduced.

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