Filtering system based on sulfuric acid production and preparation

Abstract

The utility model provides a filtering system based on sulfuric acid production and preparation. The filtering system comprises a filtering tank, a conveying pipeline, a filtering unit, a discharging pipeline, a circulating pipeline and a plurality of matched valves. The filtering tank is provided with a feeding port. The bottom end of each filtering unit is provided with a material inlet, and the top end of each filtering unit is provided with a material outlet. And the material inlet of each filtering unit is connected with the conveying pipeline. And one end of the discharging pipeline is connected with the material outlet of each filtering unit. One end of the circulating pipeline is connected with the discharging pipeline or the material outlet of each filtering unit, and the other end is connected with the filtering tank. All the valves can enable all the filtering units to be opened one by one or in batches, and circulating filtering and discharging are respectively opened. According to the filtering system based on sulfuric acid production and preparation, the plurality of filtering units are arranged, so that sufficient time can be provided for cleaning the filtering units, meanwhile, the continuity of sulfuric acid filtering work can be ensured, and the adaptability is high.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of sulfuric acid recovery, specifically relates to a filter system based on sulfuric acid production preparation. BACKGROUND

[0002] The production and preparation of sulfuric acid involves the mixing of solid particles or precipitates, i.e., acid sludge, into the sulfuric acid. The presence of acid sludge affects the purity and performance of the sulfuric acid, making it impossible to meet the requirements of specific standards or specifications. Therefore, a filter is needed to purify the sulfuric acid or the unqualified sulfuric acid mixed with a large amount of acid sludge.

[0003] In the prior art, sulfuric acid mixed with acid sludge is usually directly introduced into a filter, filtered by the filter, and then introduced into a collection tank. However, this filtering method has poor filtering effect, and the filter needs to be cleaned after a period of use. This process requires a certain amount of time, so it cannot adapt to the continuous production and preparation of sulfuric acid, and has poor practicality. SUMMARY

[0004] The utility model embodiment provides a filter system based on sulfuric acid production preparation, which aims to solve the problem of poor practicality of the existing sulfuric acid filtering method due to poor filtering effect and inability to adapt to the continuous production and preparation of sulfuric acid.

[0005] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of providing a filter system based on sulfuric acid production preparation, comprising:

[0006] A filter tank having a feed inlet for sulfuric acid mixed with acid sludge;

[0007] A conveying pipeline having one end located in the filter tank and the other end extending outward;

[0008] A plurality of filter units, each having a material inlet at the bottom end and a material outlet at the top end; the material inlets of the filter units are connected to the other end of the conveying pipeline; and each filter unit is used to filter the sulfuric acid mixed with acid sludge entering the filter unit;

[0009] A discharge pipeline having one end connected to the material outlets of the filter units and the other end connected to a collection unit;

[0010] A circulation pipeline having one end connected to the discharge pipeline or the material outlets of the filter units and the other end connected to the filter tank, the circulation pipeline being used to circulate the filtered sulfuric acid during the operation of the filter units; and

[0011] A plurality of matching valves for opening the filter units one by one or in batches.

[0012] In a possible implementation, the filter tank is provided with a feeding structure for feeding the filter aid.

[0013] In a possible implementation, the conveying pipeline comprises:

[0014] A conveying pump is arranged on the filter tank.

[0015] A feeding pipe is arranged in the filter tank and connected to the outlet of the conveying pump, and the other end of the feeding pipe is connected to the material inlet of each filter unit.

[0016] In a possible implementation, each filter unit comprises:

[0017] A vertical tank body, and the material inlet is arranged at the bottom end of the vertical tank body.

[0018] A vertical pipe is arranged inside the vertical tank body and extends out of the top end of the vertical tank body, and the top end of the vertical pipe is the material outlet.

[0019] A plurality of hollow plates are arranged horizontally in the vertical tank body and are arranged in the vertical direction, and the inner cavity of each hollow plate is in communication with the vertical pipe.

[0020] A plurality of filter structures are arranged on each hollow plate, and each filter structure comprises a plurality of filter plates arranged in the vertical direction on the hollow plate, each filter plate has a filter cavity with an open bottom end, and a plurality of filter holes in communication with the filter cavity are arranged on the surface of the filter plate, and the bottom end of each filter plate is in communication with the opening arranged on the hollow plate.

[0021] In a possible implementation, the filter plate is a rectangular plate.

[0022] In a possible implementation, the filter unit further comprises a locking structure for fixing the position of each hollow plate.

[0023] In a possible implementation, the vertical tank body comprises:

[0024] A cylinder body having a cavity with an open top end.

[0025] An upper head detachably connected to the top end of the cylinder body, and the upper head is used for fixing the vertical pipe.

[0026] In a possible implementation, the filter tank is provided with a liquid level meter.

[0027] In the present implementation, the multiple filtering units provided can be started one by one or in batches, thereby ensuring sufficient time for cleaning the filtering units and ensuring the continuity of the sulfuric acid filtering work, and being highly adaptable. In addition, the circulating pipeline, the filtering tank and the circulating pipeline can form a circulation with the working filtering unit, thereby enabling the sulfuric acid mixed with acid sludge to be circulated and filtered, ensuring the filtering effect and being highly practical. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 A structure schematic view of the filtering system prepared based on sulfuric acid production provided by the present embodiment;

[0029] Figure 2 A filtering unit structure schematic view of the filtering system prepared based on sulfuric acid production provided by the present embodiment;

[0030] Figure 3 A structure schematic view of the filtering system prepared based on sulfuric acid production provided by the present embodiment; Figure 2 A structure schematic view of the filtering system prepared based on sulfuric acid production provided by the present embodiment;

[0031] Explanation of reference signs:

[0032] 10, filtering tank; 20, conveying pipeline; 21, conveying pump; 22, feeding pipe; 30, filtering unit; 31, vertical tank body; 311, cylinder body; 312, upper head; 32, vertical pipe; 33, hollow plate; 34, filter plate; 35, locking structure; 351, pull rod; 352, nut; 40, discharge pipeline; 50, circulating pipeline; 60, valve; 70, feeding structure; 80, liquid level meter. DETAILED DESCRIPTION

[0033] In order to make the technical problems, technical solutions and beneficial effects of the present embodiment clearer, the present embodiment will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present embodiment, and are not used to limit the present embodiment.

[0034] Please refer to Figure 1The filtering system based on sulfuric acid production preparation comprises a filtering tank 10, a conveying pipeline 20, filtering units 30, a discharging pipeline 40, a circulating pipeline 50 and a plurality of matched valves 60. The filtering tank 10 is provided with a feeding port for injecting sulfuric acid mixed with acid sludge. One end of the conveying pipeline 20 is located in the filtering tank 10, and the other end extends outward. The filtering units 30 are at least two, and each filtering unit 30 is provided with a material inlet at the bottom end and a material outlet at the top end. The material inlets of the filtering units 30 are connected with the other end of the conveying pipeline 20. The filtering units 30 can filter the sulfuric acid mixed with acid sludge. One end of the discharging pipeline 40 is connected with the material outlets of the filtering units 30, and the other end is connected with a collecting unit. One end of the circulating pipeline 50 is connected with the discharging pipeline 40 or the material outlets of the filtering units 30, and the other end is connected with the filtering tank 10. The circulating pipeline 50 can circulate the filtered sulfuric acid during the working process of the filtering units 30. The valves 60 can open the filtering units 30 one by one or in batches, and can open the circulating filtering and discharging respectively.

[0035] Specifically, during the filtering process, the valves 60 are opened to open part of the filtering units 30, so that the part of the filtering units 30 is communicated with the conveying pipeline, and the sulfuric acid mixed with acid sludge is guided into the part of the filtering units 30 through the conveying pipeline 20 for filtering. Of course, during the filtering process of the part of the filtering units 30, the inside of the other filtering units 30 can be cleaned. During the filtering process, the valve 60 at the end of the discharging pipeline 40 is closed, and the valve 60 on the circulating pipeline 50 is opened to perform the circulating filtering. After the circulating filtering is completed, the valve 60 on the circulating pipeline 50 is closed, and the valve 60 on the discharging pipeline 40 is opened, so that the clear sulfuric acid is guided out of the collecting unit.

[0036] Compared with the prior art, the filtering system based on sulfuric acid production preparation provided by the embodiment can open the plurality of filtering units 30 one by one or in batches, so that sufficient time is provided for cleaning the filtering units 30, and the continuous sulfuric acid filtering work is ensured, and the adaptability is high. In addition, the circulating pipeline 50, the filtering tank 10 and the circulating pipeline 50 can form a circulation with the working filtering units 30, so that the sulfuric acid mixed with acid sludge can be filtered in circulation, the filtering effect can be ensured, and the practicability is high.

[0037] In the embodiment, the valve 60 is adaptively arranged for the person skilled in the art, and is well known to the person skilled in the art, and will not be described here.

[0038] In some embodiments, the above filtering tank 10 can adopt a structure as shown in Figure 1 . Referring to Figure 1 , the filtering tank 10 is provided with a feeding structure 70 for feeding filter aid.

[0039] The feeding structure 70 can be a feeding hopper with a sealing cover at the top end, and the filter aid can be added into the filter tank 10, mixed with the sulfuric acid, and then fed into the filter unit 30. The filter aid can be intercepted by the filter holes inside the filter unit 30, and a firm lattice-shaped filter cake layer is formed outside the filter holes. As the sulfuric acid is continuously fed, the filter cake layer gradually stabilizes, and its numerous fine channels can trap the acid sludge, and the clear sulfuric acid flows out through the filter cake layer and the filter holes, which can further ensure the filtering effect.

[0040] In some embodiments, the above-mentioned conveying pipeline 20 can adopt the structure as shown in Figure 1 . Referring to Figure 1 , the conveying pipeline 20 includes a conveying pump 21 and a feeding pipe 22. The conveying pump 21 is arranged on the filter tank 10. One end of the feeding pipe 22 is located in the filter tank 10 and connected to the outlet of the conveying pump 21, and the other end is connected to the material inlet of each filter unit 30.

[0041] The conveying pump 21 can ensure that the sulfuric acid in the filter tank 10 is pressurized and conveyed into the feeding pipe 22, and then transmitted to each filter unit 30, which has a simple structure and is convenient for conveying and transmitting the sulfuric acid mixed with acid sludge.

[0042] In some embodiments, the above-mentioned filter unit 30 can adopt the structure as shown in Figure 2 and Figure 3 . Referring to Figure 2 and Figure 3 , each filter unit 30 includes a vertical tank body 31, a vertical pipe 32, hollow plates 33, and a filter structure. The material inlet is located at the bottom end of the vertical tank body 31. The vertical pipe 32 is arranged inside the vertical tank body 31 and extends out at the top end, and the top end of the vertical pipe 32 is the material outlet. The hollow plates 33 are arranged in multiple numbers, and each hollow plate 33 is arranged horizontally in the vertical tank body 31 and spaced apart along the vertical direction. The inner cavity of each hollow plate 33 is in communication with the vertical pipe 32. The filter structure is arranged in multiple numbers, and each filter structure is arranged on each hollow plate 33. Each filter structure includes multiple filter plates 34, and each filter plate 34 is arranged on the hollow plate 33 along the vertical direction. Each filter plate 34 has a filter cavity with an open bottom end, and a plurality of filter holes are uniformly distributed on the surface of the filter plate 34 and in communication with the filter cavity. The bottom end of each filter plate 34 is in communication with the opening arranged on the hollow plate 33.

[0043] The vertical tank body 31 can provide a closed space, and the hollow plates 33 corresponding to the multiple filter structures can ensure that the filtering area is increased, thereby increasing the filtering efficiency. The vertical pipe 32 can be in communication with the inner cavities of the hollow plates 33 at the same time, which can ensure that the filtered sulfuric acid is guided out.

[0044] The bottom end of the vertical pipe 32 can be a sealed structure, or connected with the lowermost hollow plate 33. In addition, the vertical pipe 32 can be independently arranged, or fixedly connected with the hollow plate 33 by a plurality of sub-pipes to be combined.

[0045] Each filter structure includes a plurality of filter plates 34, which are arranged in a horizontal direction and vertically arranged. The number of filter holes can be further increased, the filtering area can be increased, and the filtering efficiency can be further increased. Each filter plate 34 can be integrally welded with the hollow plate 33 to ensure stable communication with the inner cavity of the hollow plate 33.

[0046] As another embodiment of the present embodiment, the hollow plate 33 can of course adopt a horizontally arranged pipe body. The bottom end of each filter plate 34 is provided with a connector pipe, which is connected with a pipe opening protruding from the pipe body. Each pipe body is connected with a vertical pipe. At this time, the vertical pipe can be provided with two vertical pipes, which are distributed at both ends of each pipe body.

[0047] In some embodiments, the filter plate 34 can adopt a structure as shown in Figure 3 . Referring to Figure 3 , the filter plate 34 is a rectangular plate. This structure can facilitate manufacturing and facilitate fixed connection with the hollow plate 33.

[0048] In addition, the hollow plate 33 can be a circular plate to facilitate adaptation to the vertical tank body 31.

[0049] In some embodiments, the filter unit 30 can adopt a structure as shown in Figure 2 to 3 . Referring to Figure 2 to 3 , the filter unit 30 further includes a locking structure 35, which can fix the position of each hollow plate 33.

[0050] The locking structure 35 can ensure the stability of each hollow plate 33, thereby ensuring the stability of the filtration. The locking structure 35 can be provided with a plurality of locking structures 35, which are arranged in a horizontal direction around the outer edge of the hollow plate 33. Each locking structure 35 can include a threaded pull rod 351 and a plurality of nuts 352. The pull rod 351 penetrates all the hollow plates 33 in a vertical direction. Each hollow plate 33 is provided with two nuts 352 on both sides, which are connected with the pull rod 351 to fix and clamp the hollow plate 33. Correspondingly, the outer edge of each hollow plate 33 is provided with an opening through which the pull rod 351 penetrates.

[0051] In some embodiments, the vertical tank body 31 can adopt a structure as shown in Figure 2 . Referring to Figure 2The vertical tank body 31 comprises a cylinder 311 and an upper head 312. The cylinder 311 has a cavity with an open top end. The upper head 312 is detachably connected to the top end of the cylinder 311, and the upper head 312 can fix the vertical pipe 32.

[0052] The upper head 312 and the cylinder 311 can be flange-connected, which is convenient for disassembly and assembly. The upper head 312 is fixedly connected with the vertical pipe 32, which can ensure that the internal filter element is directly taken out through the upper head 312. The structure can facilitate cleaning and slag removal when the filter cake layer thickness increases and causes the filtration resistance to increase and the flow rate to decrease, so as to re-establish the filter cake layer.

[0053] In some embodiments, the filter tank 10 can adopt the structure as shown in Figure 1 Referring to Figure 1 , the filter tank 10 is provided with a liquid level gauge 80.

[0054] The liquid level gauge 80 can facilitate observation of the liquid level in the filter tank 10, thereby ensuring that sulfuric acid mixed with acid sludge is timely supplemented.

[0055] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A filtration system for the production of sulphuric acid, characterised in that The application relates to a sulfuric acid filtering device. The device comprises: a filtering tank with a feeding port for injecting sulfuric acid mixed with acid sludge; a conveying pipeline with one end located in the filtering tank and the other end extending outward; at least two filtering units, each of which has a material inlet at the bottom end and a material outlet at the top end, and each of which is connected with the other end of the conveying pipeline and used for filtering the entering sulfuric acid mixed with acid sludge; a discharging pipeline with one end connected with the material outlet of each filtering unit and the other end connected with a collecting unit; a circulating pipeline with one end connected with the discharging pipeline or the material outlet of each filtering unit and the other end connected with the filtering tank, and used for circulating the filtered sulfuric acid during the working process of the filtering units; and 2. The filtration system prepared on the basis of sulfuric acid production as claimed in claim 1, characterized in that, a plurality of matched valves used for opening each filtering unit one by one or in batches.

3. The filtration system prepared based on sulfuric acid production as claimed in claim 1, wherein, The filtering tank is provided with a feeding structure for feeding filter aid. The conveying pipeline comprises: a conveying pump arranged on the filtering tank; 4. Filtration system based on the production of sulphuric acid according to any of claims 1-3, characterized in that, a feeding pipe with one end located in the filtering tank and connected with the outlet of the conveying pump and the other end connected with the material inlet of each filtering unit. Each filtering unit comprises: a vertical tank body with the material inlet located at the bottom end; a vertical pipe arranged inside the vertical tank body and extending out at the top end, and the top end of the vertical pipe being the material outlet; a plurality of hollow plates horizontally arranged in the vertical tank body and spaced apart along the vertical direction, and the inner cavities of the hollow plates being communicated with the vertical pipe; 5. The filtration system prepared on the basis of sulfuric acid production as claimed in claim 4, characterized in that, a plurality of filtering structures arranged on the hollow plates respectively, and each filtering structure comprising a plurality of filter plates arranged on the hollow plate along the vertical direction, each filter plate having a filter cavity with the bottom end being open and a plurality of filter holes distributed on the surface of the filter plate and communicated with the filter cavity, and the bottom end of each filter plate being communicated with the opening arranged on the hollow plate.

6. The filtration system prepared based on sulfuric acid production as claimed in claim 4, wherein, The filter plate is a rectangular plate.

7. The filtration system prepared based on sulfuric acid production as claimed in claim 4, wherein, The filtering unit further comprises a locking structure used for fixing the positions of the hollow plates. The vertical tank body comprises: a cylinder body with a cavity with the top end being open; 8. The filtration system prepared based on sulfuric acid production as claimed in claim 1, wherein, an upper head detachably connected with the top end of the cylinder body and used for fixing the vertical pipe. The filtering tank is provided with a liquid level meter.

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