WO2022151023A1

WO2022151023A1 - Dual-opening parallel-feed box-type filter chamber with combined primary and secondary plates, and dual-feed box-type filter press

Info

Publication number: WO2022151023A1
Application number: PCT/CN2021/071429
Authority: WO
Inventors: 刘振华; 朱国利
Original assignee: 姜桂廷
Priority date: 2021-01-13
Filing date: 2021-01-13
Publication date: 2022-07-21

Abstract

Disclosed are a dual-opening parallel-feed box-type filter chamber with combined primary and secondary plates, and a dual-feed box-type filter press. The dual-feed filter chamber comprises a dual-feed filter plate, a dual-passing distribution plate, peripheral rubber-lined filtration fabric, a fabric distributor, and an opening-end lip seal. The key point of the innovative scheme lies in innovating existing single-opening parallel feeding and developing same into dual-hole parallel feeding. Four corners of the dual-feed filter plate and the dual-passing distribution plate are equipped with lugs for providing various functional holes; the filter plate is provided with two parallel feed openings and an undercurrent discharge opening; the distribution plate is provided with multifunctional holes for back blowing material, washing and purification, and blowing and drying purification; and comprehensive improvements are made to other assemblies. The dual-feed box-type filter press uses the dual-feed filter chamber. The dual feeding comprises a unidirectional dual-opening parallel-feed mode and a bidirectional dual-opening parallel feed mode. Material passes through a dual parallel-feed general channel and is distributed to various filter chambers, such that fast and uniform feeding into each filter chamber is achieved, which comprehensively solves a variety of technical problems such as slow and insufficiently uniform single-opening parallel feeding, and produces obvious effects.

Description

Double-hole parallel-feeding box-type main and auxiliary plate combined filter chamber and double-feeding box-type filter press

technical field

The invention belongs to the technical field of box-type filter press (patent classification number B01D25/12), and relates to a box-type parallel filter chamber.

Background technique

A filter press is a multi-chamber pressurized filtration equipment operating intermittently; a chamber filter press is a filter device that consists of multiple chamber filter plates, filter cloths and matching plates arranged alternately to form a filter chamber; it is mainly composed of It is composed of frame, pressing mechanism, box filter mechanism, pulling plate mechanism, cloth washing mechanism, liquid-contacting flap mechanism, hydraulic drive mechanism, PLC program control system, etc. It is suitable for solid-liquid separation of various suspensions.

The box-type filter mechanism is the core mechanism of the filter press. It is mainly composed of multiple box-shaped combined filter chambers, front and rear anti-corrosion filter plates, filter plate support handles, and various inlet and outlet functional pipelines; the box-shaped combined filter room is the main component of the box-type filter mechanism Key components, including box filter plate (main board), matching plate (auxiliary plate), filter cloth, feed hole cloth clamp, various functional hole end seals, etc. The distribution plate has no feed distribution hole, and it is matched with the filter plate to form the main body of the box-shaped combined filter chamber; the filter cloth is used to cover the filter plate and is used as the filter medium and seals the sealing surface of the adjacent distribution plate frame; the cloth clamp is fixed by screwing. The filter cloth of the material hole; the hole end sealing ring is usually an O-type sealing ring.

The feeding method of the filter press is mostly series feeding, that is, each filter chamber is connected in series - the feeding hole is set in the cavity of the filter plate, and the feeding hole passes through each filter chamber (each filter chamber in series), such as the middle of the filter plate. Or set feeding holes in the middle and upper parts, which affects the filtering area and the effective volume of the filter chamber; parallel feeding is a new and more efficient feeding method, the feeding holes are set in the non-cavity part of the filter plate, and the feeding holes do not pass through Each filter chamber (parallel of each filter chamber), such as the upper left corner or upper right corner of the filter plate, is provided with a feed hole, the feed holes of each filter plate and its matching plate are connected to form a closed general feed channel, and the feed shunt holes are set to communicate with the inlet. Material channel and filter chamber. Because the filter press is an intermittent operation equipment, the feeding speed affects the intermittent time and production efficiency; because the filter press is a multi-chamber pressurized device, whether the feeding of each filter chamber is uniform, and whether there is pressure loss at the back end , affecting the thickness of the filter cake and the overall filtration effect.

technical problem

The existing box-shaped combined filter chambers have the following technical problems: 1. The feeding method is single-hole parallel feeding, and there is a pressure loss at the back end. The thickness of dry and wet is different, which affects the production efficiency and filtration effect. And affect the purity of the product filtrate; 3. Use filter cloth to seal the frame sealing surface of the filter plate and its matching plate, and the filter chamber is not tightly sealed; 4. The cloth clamp is screwed, and the thread of the cloth clamp is easily corroded. Difficult to disassemble.

technical solutions

The purpose of the invention is to overcome various defects of the existing box-shaped combined filter chamber, and comprehensively solve the problems that the single-hole parallel feeding is slow and not uniform, the O-ring seal has poor sealing performance under high pressure and is easy to fail, and the sealing performance of the filter cloth is poor. , the difficulty of disassembling and assembling the screw-tightening cloth clamp and other technical problems, provide a dual-hole parallel feeding box-type main and auxiliary plate combined filter chamber and a double-feeding box-type filter press; Two-way double feed holes, main and auxiliary plate - refers to the filter plate and its supporting plate.

The innovative technical scheme adopted by the present invention to solve the problems of the prior art is: a double-hole parallel feeding box-type main and auxiliary plate combined filter chamber (hereinafter referred to as: double-feeding filter chamber). The main points of the overall technical scheme are: innovative Compared with the existing technology, the overall structure has outstanding substantive features in that the existing single-hole parallel feeding method is innovated into a double-hole parallel feeding method, and the existing O-shaped sealing ring on the end face of the feeding hole is improved. It is a lip-shaped sealing ring, the existing ordinary filter cloth is improved into a peripheral brushed filter cloth, and the existing cloth clamp thread tightening method is improved into a sealing ring compression method; thus, the single-hole parallel feeding is comprehensively solved. It is slow and not uniform enough, the O-ring seal has poor sealing performance under high pressure and is easy to fail, the sealing performance of the filter cloth is poor, and the threaded cloth clamp is difficult to disassemble and assemble and other technical problems.

The specific design scheme of the double-feed filter chamber is: It is mainly composed of double-feed filter plates, double-feed matching plates, peripheral rubber-lined filter cloths, cloth distributors, hole end lip seals and other components; The material filter plate is a double-hole parallel feeding box-type filter plate with outer span ears. The double-sided structure is symmetrical, and the frame sealing surface is set around it. The ears are provided with different functional holes, among which the upper left corner and the cross ear holes are parallel feeding holes and feed distribution holes + single-chamber feeding holes, and the lower left corner and cross ear holes are dark outflow holes and outlet confluence holes + outlet small holes , the cross-ear hole in the lower right corner is a multi-function hole; the double-feeding plate (material bypassing, no feeding) is a supporting plate with the same structure as the filter plate (no feed distribution hole and outlet confluence hole), and the four corners are outside. The cross-ear has some of the same different functional holes as the filter plate. The cross-ear hole in the upper left corner is a parallel feed hole, the lower left hole is a dark outflow hole, and the lower right hole is a multi-functional hole and a water or gas split hole + small split. The peripheral rubber-lined filter cloth is the peripheral high-temperature vulcanized rubber-lined filter cloth corresponding to the sealing surface of the frame, and has a feeding hole corresponding to the single-chamber feeding hole of the filter plate; the cloth distributor is a sealing ring pressing type. Cloth-clipping distributor; lip-shaped sealing ring on the end face of the feeding hole, which is a high-pressure lip-shaped automatic sealing ring.

The connection relationship of the main parts is: for the convenience of description, the filter plate support handle closely related to this part is added; the peripheral rubber-lined filter cloth is hung on both sides of the double-feed filter plate, and the clip cloth distributor is installed in the single chamber of the filter plate. The filter cloth on both sides of the filter plate is clamped on the feed hole, the lip seal is installed in the hole end sealing groove of the double-pass material distribution plate, and the filter plate handle is symmetrically installed on the middle and upper parts of the filter plate and the two sides of the distribution plate ( Installed above the center of gravity of the filter plate), the filter plate support handle supports the filter plate and its matching plate on the guide rail on the main beam of the filter press. Multiple box filter plates, filter cloths and matching plates are arranged alternately to form a filter room. The three kinds of double-parallel feed holes, dark outflow holes and multi-function holes of the filter plate and its matching plate are respectively connected to form three kinds of closed double general feeding channels, general liquid outlet channels, and multi-functional general channels, and three kinds of feeding materials. The shunt hole, the liquid outlet confluence hole, and the water or gas shunt hole are respectively connected with three kinds of feed general channels, general liquid outlet channels, multifunctional general channels and filter chambers.

The principle of double-hole parallel feeding is: because the double-feeding filter plate has double-parallel feeding holes, feed distribution holes, and filter frame sealing surfaces, and the double-feeding distribution plate has hole-end sealing grooves; the double-parallel feeding holes are located in the filter plate. The non-cavity part of the upper left and right corners (the series feed hole is located in the cavity part of the middle of the filter plate), the end face of each inlet and outlet hole (parallel feed hole, dark outflow hole, multi-function hole) is flush with the sealing surface of the frame, and the adjacent filter The end faces of the inlet and outlet holes of the plate and its matching plate are respectively sealed with rubber sealing rings; the concave parts of multiple adjacent double-feed filter plates and their matching plates constitute a group of parallel feeding filter chambers, and the parallel feeding of multiple filter plates The holes are connected to form the general feed channel of the closed filter chamber, and the feed distribution holes of each filter plate are connected to the general feed channel and the filter chamber. The material passes through the double feed channel of the filter chamber, and is divided into each filter chamber at the same time (multi-chamber parallel), so that the feeding pressure of each filter chamber is balanced, the feeding is uniform, and the feeding and discharging are faster, thereby improving the filtering effect and production efficiency. . One-way double-hole parallel feeding is the one-way double-hole parallel feeding from the fixed thrust plate at the head; two-way double-hole parallel feeding is the double-hole moving from the direction of the fixed thrust plate at the head and the tail respectively. The direction of the pressing plate is parallel feeding.

The basic working principle of the double-feed filter chamber is as follows: the material is pressurized by the feed pump to input the material into the filter chamber in parallel through the double-feed main channel, the feed diverter hole on the filter plate, and the sandwiched distributor. During low pressure static filtration, the particles in the material retained by the filter cloth form a filter cake in the filter chamber, and the filtrate passes through the filter cloth and flows out from the outlet confluence hole on the filter plate of the filter chamber (between the filter plate and the filter cloth). ; High-pressure water or gas is fed into the filter chamber through the multi-functional water or gas distribution holes on the distribution plate, and the materials are backflushed, washed and purified, and dried and purified; the filter plate and its distribution plate are pulled apart to realize gravity unloading.

The automatic sealing principle of the lip seal is: the lip seal has a lip seal surface (including lip and lip), and the seal of the lip seal is deformed by the lip under the action of high-pressure fluid, so that the lip is tight. It is realized by sticking to the sealing surface of the end face of the feed hole; it has the functions of automatic sealing and automatic compensation. After the edge is worn, it has a certain ability to automatically compensate.

The present invention also provides a double-feeding box-type filter press, which uses the dual-hole parallel-feeding box-type main and auxiliary plate combined filter chambers provided by the present invention. The double-feed box filter press is mainly composed of a frame, a pressing mechanism, a double-hole parallel feeding filter mechanism (including the parallel filter chamber of the present invention), a pulling plate mechanism, a cloth washing mechanism, a liquid-contacting flap mechanism, a hydraulic pressure Drive mechanism, PLC program control system and other parts. The double feeding includes one-way double-hole parallel feeding and two-way double-hole parallel feeding; one-way double-hole parallel feeding is unidirectional double-hole parallel feeding from the fixed thrust plate of the machine head; two-way double-hole parallel feeding; Double-hole parallel feeding is the parallel feeding of double-holes from the direction of the fixed thrust plate at the head and the direction of the movable pressing plate at the tail.

beneficial effect

The invention provides a dual-hole parallel feeding box-type main and auxiliary plate combined filter chamber and a dual-feeding box-type filter press. The significant improvement is that the dual-hole parallel feeding is fast and uniform, and the filter area and filter chamber are effective. It has the advantages of large volume, automatic sealing of the end faces of each inlet and outlet, good sealing performance of filter cloth, and convenient disassembly and assembly of the cloth clamp; the beneficial effect is that the double-hole parallel feeding improves the filtering effect and production efficiency, and the lip seal on the end face of the feeding hole is eliminated. The environmental pollution on site is avoided, the surrounding rubber-lined filter cloth enhances the sealing performance of the filter chamber, and the press-type cloth-clipping distributor improves the efficiency of disassembly and assembly, comprehensively solves the long-standing problem of the existing box-shaped combined filter chamber, and fills the gap. The blank of two-way double-hole parallel feeding box filter press in my country.

Description of drawings

Fig. 1 is a schematic diagram of the dual-feed filter plate of the dual-hole parallel-feed box-type main and auxiliary plate combined filter chamber of the present invention.

Fig. 2 is a schematic diagram of the double-pass material distribution plate of the dual-hole parallel feeding box-type main and auxiliary plate combined filter chamber of the present invention.

Fig. 3 is a schematic diagram of the assembly of the dual-hole parallel feeding box-type main and auxiliary plate combined filter chamber of the present invention.

Reference numerals: 1-Double feed filter plate, 2-Double feed distribution plate, 3-Peripheral rubber-lined filter cloth, 4-Cloth cloth distributor, 5-Hole end lip seal, 11-Parallel feeding Hole (upper cross ear hole), 12-feed distribution hole, 13-single-chamber feed hole, 14-filter mesh point, 15-filter plate pressure platform (also supported by filter cloth), 16-frame sealing surface (filter frame sealing surface) ), 17-single-chamber feed hole end platform, 18- liquid outlet hole, 19- liquid outlet confluence hole, 20- dark outflow liquid hole (left lower cross-ear hole), 21- hole end sealing groove, 22- multi-function hole (lower right across the ear hole), 23- water or air shunt hole, 24- shunt hole.

BEST MODE FOR CARRYING OUT THE INVENTION

A dual-hole parallel feeding box-type main and auxiliary plate combined filter chamber is mainly composed of a double-feed filter plate 1, a double-feed distribution plate 2, a peripheral rubber-lined filter cloth 3, a cloth-clipping distributor 4, a hole end lip It is composed of sealing ring 5 and other components; the main points of the innovative overall implementation plan are: innovating the existing single-hole parallel feeding method into a double-hole parallel feeding method, and improving the existing O-ring on the end face of each inlet and outlet into a lip 5. The existing ordinary filter cloth is improved into a peripheral rubber-lined filter cloth 3, and the existing cloth clamp thread tightening method is improved into a sealing ring compression method; the specific embodiments are described in detail as follows.

[Corrected 15.03.2022 under Rule 91]
The double-pass material distribution plate 2 is a matching plate with the same part of the structure as the filter plate 1. It is mainly composed of double-parallel feeding holes (upper cross ear holes) 11, filter mesh points 14, and filter plate pressure platform (also supported by filter cloth). ) 15. Frame sealing surface 16, dark outflow hole (left lower cross ear hole) 20, hole end sealing groove 21, multi-function hole (right lower right cross ear hole) 22, water or gas shunt hole 23, shunt small hole 24 and other structures ; Made of polypropylene. The structure and position of the corresponding parallel feeding holes 11, filter mesh points 14, filter plate pressure platform 15, frame sealing surface 16, and dark outflow holes 20 of the matching plate 2 and the filter plate 1 are respectively the same; the hole end sealing groove 21 , including the end face sealing grooves of the three functional holes of the parallel feed hole 11, the dark outflow hole 20 and the multifunctional hole 22, which are respectively located at the ends of the corresponding functional holes and are the corresponding concave mosaic grooves of the lip seal ring 21; the matching plate 2 The multifunctional holes 22, water or gas distribution holes 23, and small distribution holes 24 are symmetrical to the left and right of the dark outflow holes 20, outflow confluence holes 19, and small outflow holes 18 of the filter plate 1, and are located on the right side of the distribution plate 2. The lower corner is across the ear, which is used to successively input high-pressure water or gas for backflushing, washing and purifying, and drying and purifying. The double-feed distribution plate 2 has no feed distribution holes 12 and outlet confluence holes 19, and the material just bypasses and does not enter the filter chamber from the distribution plate 2; it is used to match the double-feed filter plate 1 sandwiching the filter cloth 3, The concave parts of the adjacent double-feed filter plates 1 and their matching plates 2 constitute a box-shaped filter chamber, and materials and filter cakes are carried between the matching plates 2 and the filter cloth 3 .

The peripheral rubber-lined filter cloth 3 is a hanging type peripheral rubber-lined filter cloth 3. The periphery corresponding to the sealing surface 16 of the frame of the filter plate 1 is vulcanized by high-temperature rubber, and has a feed hole corresponding to the single-chamber feeding hole 13 of the filter plate 1. The material hole is used as a filter medium and seals the frame sealing surface 16 of the adjacent filter plate 1 and its matching plate 2; the peripheral rubber lining enhances the sealing performance of the filter cloth 3, and the hanging type is more convenient than the wrapping type.

The described clipping distributor 4 is a sealing ring pressing type clipping distributor 4, which is matched with the single-chamber feeding hole 13 of the double-feed filter plate 1. It is composed of a matching clip and an O-ring seal, with a feeding hole and a material splitting valve; the clipping distributor 4 is installed on the single-chamber feeding hole 13 of the filter plate 1 and clamps the filter cloth 3 on both sides of the filter plate 1, and Connect the filter chambers on both sides of the filter plate 1, and the material finally enters the filter chamber (between the distribution plate 2 and the filter cloth 3) through the feeding hole of the cloth distribution distributor 4 on the filter plate 1 and the material distribution valve (between the distribution plate 2 and the filter cloth 3); The cloth-clipping and distributing device 4 has two functions: cloth-clamping and material-distributing, which is more convenient than screw-tightening disassembly and assembly, thereby improving production efficiency.

The hole end lip seal ring 5 includes the end face lip seal ring of three functional holes of the parallel feed hole 11, the dark outflow hole 20 and the multi-function hole 22; It is improved into a high-pressure lip-shaped automatic sealing ring 5, which has a lip-shaped sealing surface (including lip and lip edge), a squeeze buffer groove, a sealing ring, a sealing convex ring, a sealing ring fixing boss, and the sealing ring contacts the bottom surface, and its lip The mouth is deformed under the action of high-pressure fluid, so that the lip edge is close to the sealing surface to achieve sealing, and it has the functions of automatic sealing and automatic compensation.

The double-hole parallel feeding box-type main and auxiliary plate combined filter chamber provided by the invention has the advantages of fast and uniform double-hole parallel feeding, large filtering area and effective volume of the filter chamber, automatic sealing of the pressure hole end face, and rubber-lined filter cloth on the periphery. 3. The advantages of good sealing performance and convenient disassembly and assembly of the press-type clamping and distributor 4. Comprehensively solve the problem that the single-hole parallel feeding is slow and not uniform enough, the O-ring seal has poor sealing performance under high pressure and is easy to fail, and the common The poor sealing performance of the filter cloth and the difficulty in disassembling and assembling the screw-on cloth clamp have achieved remarkable comprehensive technical effects.

Embodiments of the present invention

A dual-feed filter plate 1 (abbreviation: double-feed filter plate) of a dual-hole parallel feeding box-type main and auxiliary plate combined filter chamber, the main point of the innovative overall implementation scheme is: the existing single-hole parallel feeding method The innovation is to set the parallel feeding holes of the filter plates for the double-hole parallel feeding method, so as to improve the feeding speed and make the feeding of each filter chamber more uniform, improve the filtering effect and production efficiency; In order to relatively reduce the proportion of various functional holes occupying the filter part of the filter plate 1 cavity, increase the effective volume of the filter chamber of the filter plate 1 filtration area, and improve the filtration capacity and production efficiency.

[Corrected 15.03.2022 under Rule 91]
The specific embodiment is as follows: the double feed filter plate 1 is an outer cross-ear double-hole parallel feed box filter plate with a symmetrical double-sided structure, which is the core element of the filter mechanism, and has double parallel feed holes (upper cross-ear holes) 11 , feed distribution hole 12, single-chamber feed hole 13, filter mesh point 14, filter plate pressure platform (also filter cloth support) 15, frame sealing surface 16, single-chamber feed hole end platform 17, liquid outlet small hole 18 , liquid outlet confluence hole 19, dark outflow liquid hole (left lower cross ear hole) 20, multi-function hole (right lower right cross ear hole) 22; polypropylene material is used; when pressing and dehydration are required, the existing pressing diaphragm is added; the details are as follows .

The outer cross-ears are additional cross-ears integrated with the filter plate 1 at the four corners of the filter plate 1, which are the same thickness as the frame of the filter plate 1, and are used to place various functional holes; Compared with the one-piece add-on plate, the one-piece outer cross ear has a simpler structure and more reliable performance, because the filter plate 1 is a movable part and the plate core is relatively thin, and the use of screws to connect the add-on plate may loosen over time and cause leakage.

The parallel feeding hole 11, the feeding splitting hole 12, and the single-chamber feeding hole 13 are located in the upper left corner of the filter plate 1 and the cross ear; the end surface of the parallel feeding hole 11 is flush with the sealing surface 16 of the filter frame, and is installed in The hole end lip seal ring 5 on the double-feed distribution plate 2, the parallel feed holes 11 of the multiple adjacent filter plates 1 and the distribution plate 2 are connected to form a double-closed filter chamber feeding general channel; 12 is connected to the general feeding channel and the single-chamber feeding hole 13; the single-chamber feeding hole 13 is a through hole, which is used to install the press-type clamping cloth distributor 4, and communicates with the filter chambers on both sides of the filter plate; double-hole feeding Faster and more even.

The platform 17 at the end of the single-chamber feeding hole is located in the upper left corner of the filter plate 1. The plane of the platform 17 is higher than the plane of the filter mesh point 14 and lower than the frame sealing surface 16. Chamber feed hole 13.

The filter mesh points 14 are blind mesh-type round pits, which are densely and evenly distributed in the cavity of the filter plate 1, and are used to increase the friction force of the filter cake and form a seepage and diversion network.

The filter plate pressure-bearing table 15, which also serves as a filter cloth support, is in the shape of a small circular truncated cone, and is evenly distributed in the cavity of the filter plate 1 to support the filter cloth 3 and transmit pressure.

The frame sealing surface 16 is the sealing plane of the filter frame around the filter plate 1, and it kisses the frame sealing surface of the adjacent matching plate 2. The filter cloth 3 is used as a sealing member, and the adjacent filter plate 1 and filter cloth 3 , After the matching plate 2 is pressed, the filter chamber is sealed.

The dark outflow hole 20, the outflow confluence hole 19, and the small outflow hole 18 are located in the lower left corner of the filter plate 1 and the cross ear; The hole end lip seal ring 5 on the material distribution plate 2, the dark effluent holes of a plurality of adjacent filter plates 1 and the distribution plate 2 are connected to form a closed total dark effluent channel, and the liquid outlet confluence hole 19 is connected to the dark effluent The main channel, the liquid outlet hole 18 and the filter chamber.

The multi-functional hole 22 on the filter plate is a hole for water or air around the filter plate. The filter chamber does not enter water and air from this hole, and is located at the lower right of the filter plate 1 across the ear hole; a plurality of adjacent filter plates 1 and matching plates 2 The multifunctional holes are connected to form a closed water and gas general channel.

The invention provides a dual-feed filter plate 1 with a dual-hole parallel feeding box-type main and auxiliary plate combined filter chamber, which has a large filtering area and an effective volume of the filter chamber, the dual-hole parallel feeding is fast and uniform, and the liquid discharge It has the advantages of being faster and having more functions; it comprehensively solves various problems such as slow and uneven single-hole parallel feeding, poor sealing performance of the O-ring under high pressure and easy failure, and difficulty in disassembling and assembling the screw-tight cloth clamp. technical problems, and achieved remarkable technical results.

Industrial Applicability

Filter press is a general-purpose solid-liquid separation equipment integrating filtration and washing. It is widely used in hydrometallurgy, gold decyanation, alumina red mud, titanium dioxide, lithium battery materials, lithium salt, white fertilizer, inorganic salt chemical industry, Non-metallic mineral functional products as well as chemical, metallurgy, pharmaceutical, dye, food, brewing, ceramics and environmental protection industries.

A dual-feeding box-type filter press uses the dual-hole parallel-feeding box-type main and auxiliary plate combined filter chamber provided by the present invention. The double-feed box filter press is mainly composed of a frame, a pressing mechanism, a double-feed filter mechanism (including the double-feed filter chamber of the present invention), a pulling plate mechanism, a cloth washing mechanism, a liquid-contacting flap mechanism, a hydraulic pressure Drive mechanism, PLC program control system and other parts. The double-feed filter chamber of the filter mechanism is the core component of the filter press. It mainly consists of a double-feed filter plate 1, a double-feed distribution plate 2, a peripheral rubber-lined filter cloth 3, a clip cloth distributor 4, and a hole end lip. Form sealing ring 5 and other components. The technical part shared by the present invention and the prior art is in accordance with the current standards of my country's machinery industry, "Box Filter Press and Plate and Frame Filter Press Part 1: Type and Basic Parameters", "Part 2: Technical Conditions", "Part 3" : Filter plate "Manufactured by JB/T4333-2013.

The assembly of the double-feed filter chamber: for the convenience of description, the filter plate support handle closely related to this part is added; On the single-chamber feeding hole 13 of the plate 1, the filter cloth 3 on both sides of the filter plate 1 is clamped and connected to the filter chambers on both sides of the filter plate 1. In the hole end sealing groove 21 of the three functional holes, the material hole 11, the dark outflow hole 20 and the multi-function hole 22, the sealing surface 16 of the frame of the matching plate 2 protrudes by 2-3mm (greater than the thickness of the surrounding rubber-lined filter cloth 3) , the filter plate handle is symmetrically installed on the middle and upper parts of the two sides of the filter plate 1 and its matching plate 2 (installed above the center of gravity of the filter plate 1). When pressing and dehydration are required, the existing pressing diaphragm is added.

The general assembly of the double-feed filter chamber: the filter plate support handle supports the filter plate 1 and is placed on the guide rail on the main beam of the filter press. In the filter chamber, the double parallel feed holes 11, dark outflow holes 20, and multi-function holes 22 of each filter plate 1 and its matching plate 2 are respectively connected to form a closed double total feed channel, a total liquid outlet channel, and a multi-functional general channel. , the feed shunt hole 12, the liquid outlet confluence hole 19, and the water or gas shunt hole 23 are respectively connected to the total feed channel, the total liquid outlet channel, the multifunctional general channel and the filter chamber. If one-way double-hole parallel feeding is adopted, the two-hole parallel feeding is carried out from the fixed thrust plate of the machine head in one direction, and a hard pipe is used for connection; The direction of the thrust plate and the direction of the mobile pressing plate at the tail are fed in parallel, and the feeding hole at the end of the pressing plate is connected by a mobile high-pressure hose or a movable joint hard pipe.

The low-pressure static filtration process of the double-feed box filter press is as follows: pressurized by the feed pump, the material is shunted to the filter chamber (one of the two filter cloths 3) through the double-feed main channel (including the double-parallel feed holes 11). During low pressure static filtration, the particles in the material retained by the filter cloth 3 form a filter cake in the filter chamber, and the filtrate passes through the filter cloth 3 from the filter chamber (between the filter plate 1, the plate 2 and the filter cloth 3), and the liquid outlet hole 20 Outflow, pull open the filter plate to realize gravity unloading of cake. The single complete operation cycle of the filter press is as follows: compression of filter plate 1 and its matching plate 2, feeding and filtration, liquid contact with flaps, pressing and dehydration + backflushing materials, washing and purification, drying and purification, pulling and unloading Cake, cleaning filter cloth 3; through the PLC control system, a single operation cycle is automatically completed with one key; intermittent reciprocating cycle work to achieve solid-liquid separation of bulk materials (suspension).

Utilization of the multi-function hole 22: The multi-function hole 22 is the water or air inlet for backflushing materials, washing purification, drying and purification (rotational use); Blow the residual material in the double-parallel feeding holes 11 (including the double-feeding general channel) of each filter chamber and blow it back to the stirring place to avoid the slurry affecting the purity of the filter cake; for washing and purification, the water pump removes the washing liquid from The multifunctional hole 22 enters the filter chamber, and the washing liquid is injected into the filter cake to remove the soluble impurities in the filter cake, or to recover the valuable mother liquor retained in the filter cake; after drying and purification, high-pressure air enters the filter chamber from the multifunctional hole 22, Air flows through the filter cake to dry the remaining washing liquid in the cracks of the filter cake particles to reduce the moisture content of the filter cake and improve the purity of the filter cake and the recovery rate of the mother liquor; compared with the diaphragm filter press, the moisture content of the filter cake is reduced by 3- 5%. When necessary, the multifunctional main channel can also double as an auxiliary channel for dark effluent to make the effluent faster.

Sequence Listing Free Content

The dual-feed box filter press of the present invention, after repeated experiments, has a dual-feed filter plate 1, a dual-feed matching plate 2, and dual-hole parallel feeding is fast and uniform, the thickness of the filter cake is consistent in dry and wet, and the filter area and filter The effective volume of the chamber is large, the sealing performance of the filter cloth 3 is good, the cloth clamp 4 is easy to disassemble and assemble, the lip seal ring 5 of the hole end is automatically sealed, and the washing, blowing and drying are multi-functional; the beneficial effect is that the double-hole parallel feeding improves The filter effect and production efficiency are improved. The lip seal on the end face of each inlet and outlet eliminates environmental pollution on site. The surrounding rubber-lined filter cloth 3 enhances the sealing performance of the filter chamber. It comprehensively solves the long-standing and difficult problems of box filter presses, which is the development trend of high-efficiency automatic filter presses.

Claims

[Corrected 15.03.2022 under Rule 91]
A dual-hole parallel feeding box-type main and auxiliary plate combined filter chamber, comprising double-feeding filter plates, double-passing material distribution plates, peripheral rubber-lined filter cloths, cloth-clipping distributors, and hole-end lip-shaped sealing rings; It is: the double feed filter plate is a parallel feed box filter plate with two holes across the outer ears. The double-sided structure is symmetrical, the frame sealing surface is set around, and the single-chamber feed hole end platform lower than the frame sealing surface is set at the upper left corner , The four corners of the outer ear are set with different functional holes, of which the upper left corner and the cross ear holes are parallel feed holes and feed distribution holes + single-chamber feed holes, and the lower left corner cross ear holes are dark outflow holes and outlet confluence holes + outlet The liquid small hole, the lower right corner cross-ear hole is a multi-functional hole; the double-feeding plate is a matching plate with the same structure as the filter plate, and the four-corner outer cross-ear has some different functional holes that are the same as the filter plate. The ear holes are parallel feeding holes, the lower left corner hole is a dark outflow hole, and the lower right corner hole is a multi-function hole and a water or gas shunt hole + a shunt hole; the peripheral rubber-lined filter cloth is hung on both sides of the double-feed filter plate, clamped The cloth distributor is installed on the single-chamber feeding hole of the filter plate and clamps the filter cloth on both sides of the filter plate. The lip seal is installed in the hole end sealing groove of the double-feed distribution plate, and there are multiple double-feed filter plates. , filter cloth and distribution plate are arranged alternately to form a filter chamber, and the three kinds of double-parallel feed holes, dark outflow holes and multi-function holes of each filter plate and its distribution plate are respectively connected to form three closed double general feed channels, total The liquid outlet channel, the multifunctional general channel, the three feed distribution holes, the liquid outlet confluence hole, and the water or gas distribution hole are respectively connected to the three feed general channels, the total liquid outlet channel, the multifunctional general channel and the filter chamber.
The dual-hole parallel feeding box-type main and auxiliary plate combined filter chamber according to claim 1, wherein the peripheral rubber-lined filter cloth is a hanging type peripheral rubber-lined filter cloth, and the frame of the double-feeding filter plate is The corresponding periphery of the sealing surface is vulcanized by high-temperature rubber, and has feeding holes corresponding to the single-chamber feeding holes of the double-feeding filter plate.
The dual-hole parallel feeding box-type main and auxiliary plate combined filter chamber according to claim 1, characterized in that, the cloth-clipping distributor is a sealing-ring pressing-type clamping-clothing distributor, which is combined with the double-feed filter The single-chamber feeding hole of the plate is composed of a stainless steel split-flow half-side main clip, a split-flow half-side matching clip, and an O-ring seal. It has a feed hole and a material split valve.
The dual-hole parallel feeding box-type main and auxiliary plate combined filter chamber according to claim 1, wherein the hole end lip-shaped sealing ring has a lip and a lip-shaped lip-shaped sealing surface, a squeeze buffer groove , The sealing ring, the sealing convex ring, the sealing ring fixing boss, and the sealing ring contact the bottom surface, and the lip is deformed under the action of high-pressure fluid, so that the lip edge is close to the sealing surface to achieve sealing, with automatic sealing and automatic compensation functions.
A double-feed box filter press includes a frame, a pressing mechanism, a double-feed filter mechanism, a plate pulling mechanism, a cloth washing mechanism, a liquid-contacting flap mechanism, a hydraulic drive mechanism, and a PLC program control system; it is characterized in that , including the dual-hole parallel feeding box-type main and auxiliary plate combined filter chamber according to any one of claims 1-4; the double-feeding includes unidirectional dual-hole parallel feeding, bidirectional dual-hole parallel feeding Way.