Sulfuric acid mud filter

Abstract

The utility model provides a sulfuric acid mud filter, which belongs to the technical field of sulfuric acid production and comprises a filter cylinder, a screening rotary barrel, a feed pipe and an acid discharge pipe. A driving motor is arranged at the bottom of the filter cylinder; the screening rotary barrel comprises a plurality of screening assemblies which are sequentially connected from bottom to top, an output shaft of the driving motor is in transmission connection with the screening assembly at the bottom, each screening assembly comprises a screening disc and a screening sleeve, the screening disc and the screening sleeve are each provided with a plurality of screening holes, and the hole diameters of the screening holes in the multiple screening assemblies are sequentially reduced from top to bottom; the feeding pipe is arranged at the top of the filter cylinder, and a centrifugal pump is arranged on the feeding pipe; and the acid discharge pipe is arranged at the bottom of the filter cylinder and is used for discharging sulfuric acid obtained by filtering acid mud. According to the sulfuric acid mud filter provided by the utility model, sulfuric acid in acid mud can be separated, meanwhile, the acid mud with different particle sizes can be classified at one time, and the acid mud recovery cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of sulfuric acid production, and more specifically, relates to a sulfuric acid sludge filter. Background Art

[0002] Sulfuric acid sludge is a by-product generated during industrial production, especially during the production of sulfuric acid by the contact process. This sludge is mainly produced due to side reactions during the sulfuric acid production process and contains unreacted sulfuric acid, sulfates, and other impurities. These substances will form a light earthy white or light yellow loose earthy sludge-like substance under specific conditions, such as in a dry chlorine pipeline.

[0003] Through filtration and recovery of the sludge, valuable substances can be recovered from it, and at the same time, environmental pollution can be reduced. Since the composition of the sludge is relatively complex, fine process control and multi-step treatment are usually required to achieve effective recovery, resulting in a significant increase in the sludge recovery cost. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a sulfuric acid sludge filter, aiming to solve the problem of high sludge recovery cost caused by fine process control and multi-step treatment in the existing sludge recovery process.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is: to provide a sulfuric acid sludge filter, including:

[0006] A filter cylinder body, with a driving motor arranged at the bottom of the filter cylinder body;

[0007] A screening rotating barrel, which includes a plurality of screening components connected in sequence from bottom to top. The output shaft of the driving motor is drivingly connected to the bottom screening component to drive the plurality of screening components to rotate synchronously. The screening component includes a screening disc and a screening sleeve arranged circumferentially on the screening disc and extending upward. Both the screening disc and the screening sleeve are provided with a plurality of screening holes, and the apertures of the screening holes on the plurality of screening components decrease sequentially from top to bottom;

[0008] A feed pipe, which is arranged at the top of the filter cylinder body. A centrifugal pump is arranged on the feed pipe, and the feed pipe sucks the sludge at the bottom of the equipment into the inner cavity top of the filter cylinder body through the power pump;

[0009] An acid discharge pipe, which is arranged at the bottom of the filter cylinder body and is used to discharge the sulfuric acid after the sludge is filtered.

[0010] In a possible implementation manner, a sealing end cover is detachably arranged at the top of the filter cylinder body.

[0011] In a possible implementation, a bottom reinforcing ring is provided at the bottom of the screening sleeve, and a top reinforcing ring is provided at the top of the screening sleeve. Among two adjacent screening components, the bottom reinforcing ring of the upper screening component is axially inserted into the top reinforcing ring of the lower screening component, and an anti-rotation structure is provided between the bottom reinforcing ring of the upper screening component and the top reinforcing ring of the lower screening component.

[0012] In a possible implementation, an insertion ring is provided at the bottom of the bottom reinforcing ring of the upper screening component. The outer diameter of the insertion ring is smaller than the outer diameter of the bottom reinforcing ring. An insertion groove is circumferentially formed on the inner side of the upper end surface of the top reinforcing ring of the lower screening component. The insertion ring is inserted into the insertion groove from top to bottom, and the anti-rotation structure is provided between the insertion ring and the insertion groove.

[0013] In a possible implementation, the anti-rotation structure includes a plurality of anti-rotation blocks and a plurality of anti-rotation grooves. The plurality of anti-rotation blocks are provided on the circumference of the insertion ring, and the plurality of anti-rotation grooves are longitudinally formed on the outer circumference of the insertion groove. The plurality of anti-rotation blocks are inserted into the plurality of anti-rotation grooves in one-to-one correspondence.

[0014] In a possible implementation, a fixed handle is radially provided on the top reinforcing ring, and the upper end surface of the fixed handle is not higher than the bottom surface of the insertion groove.

[0015] In a possible implementation, a plurality of reinforcing ribs are longitudinally provided on the outer circumference of the screening sleeve, and the plurality of reinforcing ribs are connected between the bottom reinforcing ring and the top reinforcing ring.

[0016] In a possible implementation, a guiding tube is provided at the top of the inner cavity of the filter cylinder. One end of the guiding tube is connected to the end of the feed pipe that penetrates into the inner cavity of the filter cylinder, and the other end of the guiding tube faces the middle area of the top screening component.

[0017] In a possible implementation, the guiding tube includes a connecting tube and a guiding tube. The connecting tube and the guiding tube are integrally formed. The connecting tube is detachably connected to the end of the feed pipe that penetrates into the inner cavity of the filter cylinder. The guiding tube is inclined downward from outside to inside, and is used to guide the acid sludge to fall into the middle area of the top screening component.

[0018] In a possible implementation, a conical recess is provided at the bottom of the inner cavity of the filter cylinder, and the upper end of the acid discharge pipe is provided at the bottom of the conical recess.

[0019] The beneficial effects of a sulfuric acid sludge filter provided by the present utility model are as follows: Compared with the prior art, under the action of a centrifugal pump, the feed pipe sucks the acid sludge at the bottom of the equipment and transports it to the top of the inner cavity of the filter cylinder. Since the aperture diameters of the screening holes on multiple screening components decrease successively from top to bottom, the acid sludge is respectively retained on the screening components at different heights according to the change of particle size. The acid sludge retained on the upper screening component has the largest particle size, and the acid sludge retained on the lower screening component has the smallest particle size. Start the driving motor, and the driving motor drives multiple screening components to rotate synchronously. The acid sludge with different particle sizes on the multiple screening components is filtered through the corresponding multiple screening holes under the action of centrifugal force. The acid sludge with different particle sizes remains in different screening trays and screening sleeves, and the sulfuric acid liquid flows to the bottom of the inner cavity of the filter cylinder through the screening holes and is finally discharged through the acid discharge pipe. A sulfuric acid sludge filter provided by the present utility model can realize the separation of sulfuric acid in the acid sludge, and at the same time can complete the classification of acid sludge with different particle sizes at one time, reducing the cost of acid sludge recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 is a schematic structural diagram of a sulfuric acid sludge filter provided by the present utility model;

[0022] Figure 2 is a front view of the upper screening component provided by the present utility model;

[0023] Figure 3 is a top view of the lower screening component provided by the present utility model;

[0024] Figure 4 is Figure 2 a partial enlarged view of part A in

[0025] Figure 5 is Figure 3 a partial enlarged view of part B in

[0026] In the figure: 1, filter cylinder; 2, sealing end cover; 3, driving motor; 4, screening tray; 5, screening sleeve; 6, feed pipe; 7, centrifugal pump; 8, acid discharge pipe; 9, bottom reinforcing ring; 10, top reinforcing ring; 11, insertion ring; 12, insertion groove; 13, anti-rotation block; 14, anti-rotation groove; 15, fixed handle; 16, reinforcing rib; 17, connecting pipe; 18, guiding pipe; 19, conical recess; 20, support leg. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0028] Unless otherwise clearly defined, when using terms such as "first", "second" or "third", etc., they are all used to distinguish different objects and are not used to describe a specific order.

[0029] Unless otherwise clearly defined, for orientation terms, when using terms such as "center", "horizontal", "longitudinal", "level", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise", "high", "low", etc. to indicate the orientation or position relationship, it is based on the orientation and position relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as limiting the specific protection scope of the present utility model.

[0030] Please refer to Figure 1 , and now a sulfuric acid sludge filter provided by the present utility model will be described. A sulfuric acid sludge filter includes a filter cylinder 1, a screening rotating barrel, a feed pipe 6 and a acid discharge pipe 8.

[0031] A driving motor 3 is arranged at the bottom of the filter cylinder 1; the screening rotating barrel includes a plurality of screening components connected in sequence from bottom to top, and the output shaft of the driving motor 3 is drivingly connected to the bottom screening component to drive the plurality of screening components to rotate synchronously. The screening component includes a screening disc 4 and a screening sleeve 5 arranged on the circumference of the screening disc 4 and extending upward. Both the screening disc 4 and the screening sleeve 5 are provided with a plurality of screening holes, and the aperture diameters of the screening holes on the plurality of screening components decrease sequentially from top to bottom; the feed pipe 6 is arranged at the top of the filter cylinder 1, and a centrifugal pump 7 is arranged on the feed pipe 6. The feed pipe 6 sucks the acid sludge at the bottom of the equipment into the top of the inner cavity of the filter cylinder 1 through a power pump; the acid discharge pipe 8 is arranged at the bottom of the filter cylinder 1, and the acid discharge pipe 8 is used to discharge the sulfuric acid after the acid sludge is filtered.

[0032] A sulfuric acid sludge filter provided by the utility model, compared with the prior art, under the action of the centrifugal pump 7, the feed pipe 6 sucks the acid sludge at the bottom of the equipment and transports it to the top of the inner cavity of the filter cylinder 1. Since the aperture diameters of the screening holes on the multiple screening components decrease successively from top to bottom, the acid sludge is respectively retained on the screening components at different heights according to the change of particle size. The acid sludge retained on the upper screening component has the largest particle size, and the acid sludge retained on the lower screening component has the smallest particle size. Start the driving motor 3, and the driving motor 3 drives the multiple screening components to rotate synchronously. The acid sludge with different particle sizes on the multiple screening components is filtered through the corresponding multiple screening holes under the action of centrifugal force. The acid sludge with different particle sizes remains in different screening trays 4 and screening sleeves 5, and the sulfuric acid liquid flows to the bottom of the inner cavity of the filter cylinder 1 through the screening holes and is finally discharged through the acid discharge pipe 8. The sulfuric acid sludge filter provided by the present utility model can realize the separation of sulfuric acid in the acid sludge, and at the same time can complete the classification of acid sludge with different particle sizes at one time, reducing the cost of acid sludge recovery.

[0033] Among them, a plurality of support legs 20 are arranged at the bottom of the filter cylinder 1. The driving motor 3 is installed in the middle below the filter cylinder 1 and inside the plurality of support legs 20. The plurality of support legs 20 jointly support the filter cylinder 1, so as to form a space for installing the driving motor 3 at the bottom.

[0034] Please refer to Figure 1 , the top of the filter cylinder 1 is detachably provided with a sealing end cover 2. The sealing end cover 2 is installed on the top of the filter cylinder 1 in a spiral manner and is sealed by pressing the sealing ring. The detachable sealing end cover 2 can facilitate the removal of the multiple screening components from the filter cylinder 1.

[0035] Please refer to Figure 2 and Figure 3 , a bottom reinforcing ring 9 is arranged at the bottom of the screening sleeve 5, and a top reinforcing ring 10 is arranged at the top of the screening sleeve 5. Among the adjacent two screening components, the bottom reinforcing ring 9 of the upper screening component is axially inserted into the top reinforcing ring 10 of the lower screening component, which can realize the axial assembly of the upper screening component and the lower screening component. An anti-rotation structure is arranged between the bottom reinforcing ring 9 of the upper screening component and the top reinforcing ring 10 of the lower screening component. The anti-rotation structure can realize the circumferential assembly of the upper screening component and the lower screening component, prevent the relative rotation of the two, and can achieve the effect of synchronous rotation of the multiple screening components.

[0036] At the bottom of the bottom reinforcing ring 9 of the upper screening assembly, there is an insertion ring 11. The outer diameter of the insertion ring 11 is smaller than that of the bottom reinforcing ring 9. The insertion ring 11 and the bottom reinforcing ring 9 are integrally formed. The position of the insertion ring 11 forms a stepped structure with a reduced outer diameter; on the inner circumferential surface of the upper end face of the top reinforcing ring 10 of the lower screening assembly, an insertion groove 12 is circumferentially opened. The position of the insertion groove 12 also forms a stepped structure with a reduced outer diameter. The two stepped structures are adapted to each other. The insertion ring 11 is inserted into the insertion groove 12 from top to bottom, and an anti-rotation structure is arranged between the insertion ring 11 and the insertion groove 12.

[0037] Specifically, the anti-rotation structure includes a plurality of anti-rotation blocks 13 and a plurality of anti-rotation grooves 14. The plurality of anti-rotation blocks 13 are arranged on the circumference of the insertion ring 11. The plurality of anti-rotation grooves 14 are longitudinally opened on the outer circumference of the insertion groove 12. The plurality of anti-rotation blocks 13 are inserted into the plurality of anti-rotation grooves 14 one by one, and a limiting structure that can limit the relative rotation of the insertion ring 11 and the insertion groove 12 can be formed, thereby restricting the relative rotation of two adjacent screening assemblies.

[0038] In addition, a fixed handle 15 is radially arranged on the top reinforcing ring 10. The upper end face of the fixed handle 15 is not higher than the bottom surface of the insertion groove 12. The fixed handle 15 will not affect the cooperation of adjacent screening assemblies. At the same time, when removing the screening assembly, the screening assembly can also be taken out or put in by holding the handle, and the operation is more convenient.

[0039] Please refer to Figure 1 and Figure 2 As shown in, a plurality of reinforcing ribs 16 are longitudinally arranged on the outer circumference of the screening sleeve 5. The plurality of reinforcing ribs 16 are connected between the bottom reinforcing ring 9 and the top reinforcing ring 10, which can improve the structural strength of the screening sleeve 5 and prevent it from deforming.

[0040] Preferably, a guide pipe is arranged at the top of the inner cavity of the filter cylinder 1. One end of the guide pipe is connected to the end of the feed pipe 6 that penetrates into the inner cavity of the filter cylinder 1, and the other end of the guide pipe faces the middle area of the top screening assembly. The guide pipe can guide the acid sludge that enters the inner cavity of the filter cylinder 1 through the feed pipe 6 to fall onto the middle part of the upper end face of the sieve plate of the top screening assembly.

[0041] Specifically, the guide pipe includes a connecting pipe 17 and a guiding pipe 18. The connecting pipe 17 and the guiding pipe 18 are integrally formed. The connecting pipe 17 is detachably connected to the end of the feed pipe 6 that penetrates into the inner cavity of the filter cylinder 1. The connecting pipe 17 and the feed pipe 6 are connected by a sealing sleeve. When it is necessary to remove the screening assembly, the guide pipe is removed by disassembling the connecting pipe 17, and then the screening assembly can be taken out from the filter cylinder 1. The guiding pipe 18 is inclined downward from outside to inside, and is used to guide the acid sludge to fall into the middle area of the top screening assembly.

[0042] Preferably, a conical recess 19 is provided at the bottom of the inner cavity of the filter cylinder body 1, and the upper end of the acid discharge pipe 8 is arranged at the bottom of the conical recess 19, which can reduce the residue of sulfuric acid liquid at the bottom of the filter cylinder body 1 and discharge all the sulfuric acid liquid as much as possible.

[0043] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sulfuric acid sludge filter, characterized in that, Comprising: A filtering cylinder body (1), with a driving motor (3) provided at the bottom of the filtering cylinder body (1); A screening rotating barrel, which includes a plurality of screening components connected in sequence from bottom to top. The output shaft of the driving motor (3) is drivingly connected to the bottom screening component to drive the plurality of screening components to rotate synchronously. The screening component includes a screening disc (4) and a screening sleeve (5) arranged circumferentially on the screening disc (4) and extending upward. Both the screening disc (4) and the screening sleeve (5) are provided with a plurality of screening holes, and the apertures of the screening holes on the plurality of screening components decrease sequentially from top to bottom; A feed pipe (6), which is arranged at the top of the filtering cylinder body (1). A centrifugal pump (7) is arranged on the feed pipe (6). The feed pipe (6) sucks the acid sludge at the bottom of the equipment into the top of the inner cavity of the filtering cylinder body (1) through the centrifugal pump (7); An acid discharge pipe (8), which is arranged at the bottom of the filtering cylinder body (1). The acid discharge pipe (8) is used to discharge the sulfuric acid after the acid sludge is filtered.

2. The sulfuric acid sludge filter according to claim 1, wherein A sealing end cover (2) is detachably arranged at the top of the filtering cylinder body (1).

3. The sulfuric acid sludge filter according to claim 1, characterized in that, A bottom reinforcing ring (9) is arranged at the bottom of the screening sleeve (5), and a top reinforcing ring (10) is arranged at the top of the screening sleeve (5). Among two adjacent screening components, the bottom reinforcing ring (9) of the upper screening component is axially inserted into the top reinforcing ring (10) of the lower screening component, and an anti-rotation structure is arranged between the bottom reinforcing ring (9) of the upper screening component and the top reinforcing ring (10) of the lower screening component.

4. The sulfuric acid sludge filter according to claim 3, wherein An insertion ring (11) is arranged at the bottom of the bottom reinforcing ring (9) of the upper screening component. The outer diameter of the insertion ring (11) is smaller than the outer diameter of the bottom reinforcing ring (9). An insertion groove (12) is circumferentially opened on the inner side of the upper end surface of the top reinforcing ring (10) of the lower screening component. The insertion ring (11) is inserted into the insertion groove (12) from top to bottom, and the anti-rotation structure is arranged between the insertion ring (11) and the insertion groove (12).

5. The sulfuric acid sludge filter according to claim 4, wherein The anti-rotation structure includes a plurality of anti-rotation blocks (13) and a plurality of anti-rotation grooves (14). The plurality of anti-rotation blocks (13) are arranged circumferentially on the insertion ring (11), and the plurality of anti-rotation grooves (14) are longitudinally opened on the outer periphery of the insertion groove (12). The plurality of anti-rotation blocks (13) are inserted into the plurality of anti-rotation grooves (14) one by one.

6. The sulfuric acid sludge filter according to claim 4, characterized in that, A fixed handle (15) is radially arranged on the top reinforcing ring (10), and the upper end surface of the fixed handle (15) is not higher than the bottom surface of the insertion groove (12).

7. The sulfuric acid sludge filter according to claim 3, characterized in that, A plurality of reinforcing ribs (16) are longitudinally arranged on the outer periphery of the screening sleeve (5), and the plurality of reinforcing ribs (16) are connected between the bottom reinforcing ring (9) and the top reinforcing ring (10).

8. The sulfuric acid sludge filter according to claim 1, characterized in that, A guide pipe is provided at the top of the inner cavity of the filter cylinder (1). One end of the guide pipe is connected to the end of the feed pipe (6) that penetrates into the inner cavity of the filter cylinder (1), and the other end of the guide pipe faces the middle area of the screening assembly at the top.

9. The sulfuric acid sludge filter according to claim 8, characterized in that, The guide pipe includes a connecting pipe (17) and a guiding pipe (18). The connecting pipe (17) and the guiding pipe (18) are integrally formed. The connecting pipe (17) is detachably connected to the end of the feed pipe (6) that penetrates into the inner cavity of the filter cylinder (1). The guiding pipe (18) inclines downward from the outside to the inside, and is used to guide the acid sludge to fall into the middle area of the screening assembly at the top.

10. A sulfuric acid sludge filter as described in claim 1, characterized in that, A conical recess (19) is provided at the bottom of the inner cavity of the filter cylinder (1). The upper end of the acid discharge pipe (8) is arranged at the bottom of the conical recess (19).

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