CN217449092U

CN217449092U - Water-saving filter cake continuous circulating washing system of efficient washing and filter pressing unit

Info

Publication number: CN217449092U
Application number: CN202221362419.8U
Authority: CN
Inventors: 党明; 刘振华; 梁一
Original assignee: Jingjin Equipment Co Ltd
Current assignee: Jingjin Equipment Co Ltd
Priority date: 2022-06-02
Filing date: 2022-06-02
Publication date: 2022-09-20
Anticipated expiration: 2032-06-02

Abstract

The utility model discloses high-efficient washing filter press unit's water conservation formula filter cake continuous cycle washing system, the main points of innovation scheme are: the existing multi-washing-tank intermittent washing system is improved into a single-circulating-water-tank continuous washing system which comprises a filtering and washing mechanism, a washing water pump, a material mixing tank, a clear water tank, a circulating water tank, a filtrate tank and various fluid pipelines; the main innovation points are as follows: (1) the structure of a filter cake washing system is simplified, the existing three washing tanks are combined and simplified into a circulating washing tank, two washing tanks are omitted, and the washing mode is optimized to ensure that the washing tank still maintains and is superior to all functions of the original multi-washing tank type intermittent washing system; (2) the washing mode is optimized, the existing repeated intermittent washing mode is improved into a continuous washing mode by using circulating water, the technical problems that the structure of a washing system is complex, the occupied area is large, the procedures of an intermittent washing method are multiple, the washing effect and efficiency are low, and the water consumption is high due to the multiple washing tank mode are solved, and the effect is remarkable.

Description

Water-saving filter cake continuous circulating washing system of efficient washing and filter pressing unit

Technical Field

The utility model belongs to the technical field of high-efficient washing filter press unit (patent classification number B01D 25/12), also belongs to and omits the essential element invention, relates to a continuous circulation washing system of filter cake.

Background

The filter press is a pressurized filtering device with multiple filtering chambers operated intermittently; the washing filter press is a filtering and washing integrated filter press for material pressurization filtration and filter cake washing purification; the high-efficient washing filter press is a washing filter press which can shorten the intermittent time, accelerate the operation cycle and improve the production efficiency; the device mainly comprises a double-beam frame, a filter plate pressing mechanism, a filtering and washing mechanism, a turning plate liquid receiving mechanism, a pulling plate cake discharging mechanism, a filter cloth cleaning mechanism and a PLC program control system; the single operation cycle process of the high-efficiency washing filter press comprises the steps of filter plate pressing, feeding and filtering, washing and purifying, squeezing and dewatering (including pressure maintaining), back blowing of materials (materials precipitated in a feed hole in the back blowing and pressure maintaining process), blow drying and purifying, plate pulling and cake unloading and filter cloth cleaning, and is automatically finished in a one-key mode under the control of a PLC program control system; the device is suitable for high-efficiency solid-liquid separation and purification of various valuable suspension materials (namely a mixture of liquid and solid particles) with high filter cake purity or filtrate recovery rate requirements.

The washing and filter-pressing unit mainly comprises a washing filter press, a filtering and washing mechanism of the washing filter press, a material pool (namely a material mixing pool), a material pump (namely a material conveying pump), a filtrate pool, a clear water tank, a primary washing tank, a secondary washing tank, a washing water pump, an air compressor (namely an air compressor), a dual-purpose hydraulic station, filter cake storage and transportation equipment (comprising filter cake storage equipment and transportation equipment) and various fluid pipelines; the filter washing mechanism, the filtrate tank, the clean water tank, the primary washing tank, the secondary washing tank, the tertiary washing tank, the washing water pump and various fluid pipelines form a multi-washing tank type filter cake intermittent washing system; the washing water in the primary washing tank, the secondary washing tank and the tertiary washing tank is washing water with different pH values after the filter cake is washed twice, three times and four times in the last cycle respectively. The purpose of cake washing was: removing soluble impurities or mother liquor in the filter cake with higher requirement on purity to improve the purity of the filter cake, or recovering valuable mother liquor remained in the filter cake of the noble materials to improve the recovery rate of the noble filtrate.

The working process of the multi-washing groove type intermittent washing system for the filter cake comprises the following steps: for convenience of explanation, the feeding and filtering closely related to the washing process are added under the control of a PLC program control system; (1) feeding and filtering: the material conveying pump pressurizes and inputs the mixed material into a filtering and washing mechanism, so that pressure difference is formed between two sides of filter cloth, low-pressure static filtering is carried out, particles in the material are intercepted by the filter cloth to form filter cakes in a filtering chamber, and filtrate passes through the filter cloth and flows out of a liquid outlet hole to a filtrate pool; (2) intermittently washing a filter cake: after the filter cake is formed, the filter cake is washed successively with washing waters of different PH values: (2.1) washing for the first time, wherein a washing water pump inputs washing water in a first washing tank into a filtering and washing mechanism and injects the washing water into a filter cake, and the washing water passes through the filter cloth and flows out of a liquid outlet hole to a filtrate tank; (2.2) carrying out secondary washing, wherein a washing water pump inputs washing water in a secondary washing tank into a filtering washing mechanism and injects the washing water into a filter cake, and the washing water passes through the filter cloth and flows out of a liquid outlet hole to a primary washing tank; (2.3) washing for three times, wherein washing water in the washing tank for three times is input into a filtering washing mechanism and is injected into a filter cake by a washing water pump, and the washing water passes through the filter cloth and flows out of the liquid outlet hole to the washing tank for two times; (2.4) washing for four times, wherein the washing water pump inputs the clean water in the clean water tank into the filtering and washing mechanism and injects the clean water into a filter cake, and the clean water flows out of the third washing tank from the liquid outlet hole through the filter cloth; (3) and (4) intermittently and repeatedly starting until the PH value (pH value) or the conductivity of the washing liquid reaches the standard, finishing the washing of the filter cake, and entering the next operation process.

The existing multi-washing tank type intermittent washing system for filter cakes has the following defects: (1) the filter cake washing system is complex in structure due to the mode of multiple washing tanks, various fluid pipelines are criss-cross, the occupied area is large, the investment of a workshop is large, and the failure rate is high; (2) the intermittent washing method has various working procedures, the washing water pump is repeatedly started and stopped, the washing effect and efficiency are low, and the water consumption is high; the requirements of users of the washing and filter pressing unit on cost reduction, efficiency improvement and high-efficiency production cannot be met; simplifying the structure of a filter cake washing system and continuously washing is a technical problem which is always desired to be solved but is not always successful.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the defect of current many washing tank formula filter cake intermittent type washing system, solving many washing tank modes and making filter cake washing system structure complicated, occupy area, intermittent type washing method process is various, washing effect and efficiency are lower, and consume more technical problem of water, provide a water conservation formula filter cake continuous cycle washing system of high-efficient washing filter pressing unit.

The utility model provides an innovation technical scheme that prior art problem adopted is: a water-saving filter cake continuous circulating washing system (hereinafter referred to as filter cake continuous washing system) of a high-efficiency washing and filter pressing unit; the main point of the general technical scheme is that compared with the prior art, the innovative general structure has the prominent substantive characteristics that: the existing multi-washing tank type filter cake intermittent washing system is improved into a water-saving type filter cake continuous circulating washing system, namely a single circulating washing tank water-saving type filter cake continuous circulating washing system which comprises a filtering washing mechanism, a circulating water outlet valve, a clean water inlet valve, a filtrate discharging valve (namely a filtrate inlet tank valve), a washing water pump, a washing liquid discharging valve, a circulating water inlet valve, a material mixing tank, a clean water tank, a circulating water tank (namely a circulating washing tank), a filtrate tank and various fluid pipelines; the main innovation is as follows: (1) the structure of a filter cake washing system is simplified, and the existing three washing tanks are combined and simplified into a circulating washing water tank, so that the structure is simple and compact, and the occupied area of equipment is reduced; two washing tanks are omitted, and the washing mode is optimized, so that the washing tank still keeps and is superior to all functions of the original multi-washing-tank type intermittent washing system for filter cakes; (2) the washing mode is optimized, and the existing multiple intermittent washing mode is improved into a continuous circulating washing mode: (2.1) washing with clean water: firstly, washing filter cakes in a bidirectional and crossed manner by using clear water; (2.2) circulating water washing: after the washing water flows out of the circulating water tank, the water inlet valve is automatically switched simultaneously, namely the clean water inlet valve is closed and the circulating water inlet valve is opened, the washing water pump continuously pumps the circulating washing water into the filtering and washing mechanism and injects filter cakes in two directions, and the washing water flows back to the circulating water tank from the liquid outlet hole after passing through the filter cloth; (2.3) washing with clean water: when the pH value (pH value) of the washing water is the same as that of the filter cake, discharging the washing liquid with high pH value into a filtrate tank, automatically switching a water inlet valve, and washing the filter cake with clear water; the steps are repeated until the PH value or the conductivity of the washing liquid reaches the standard, and the washing of the filter cake is finished; the continuous washing effect is good, the efficiency is high, the water is saved by the circular washing, and unexpected technical effects are achieved; therefore, the technical problems that a filter cake washing system is complex in structure, large in occupied area, various in intermittent washing method procedures, low in washing effect and efficiency and high in water consumption due to the multi-washing-tank mode are solved. The specific design scheme of the utility model is explained in detail as follows.

The filtering and washing mechanism, namely a multi-filter chamber pressurizing and filtering and filter cake washing mechanism, is a core mechanism of a washing filter press and mainly comprises a head-tail sealed anticorrosive filter plate, a matched filter plate assembly, filter cloth, and parts such as all fluid inlet and outlet external pipelines; the matched filter plate component comprises a washing filter plate, a matched filtering and washing plate, a cloth clamping distributor, a filter plate sliding support and sealing rings at the inlet and outlet ends of each fluid; (1) the washing filter plate is provided with a symmetrical double-sided structure and is provided with a feed inlet, a small water inlet row hole, a liquid outlet and water inlet hole (four holes for liquid outlet when the filter chamber is used for filtering, two holes for water inlet and two holes for liquid outlet when the filter chamber is used for filtering, a water inlet converging channel, a plate frame sealing surface, a filter plate pressure bearing table (also used for supporting filter cloth), a concave filter cavity and a filter screen point surface (namely the concave filter cavity screen point surface), as shown in figure 3; during filtering or washing, the double liquid outlet holes and the double water inlet holes are alternately used as double liquid outlet holes or double water inlet holes; (2) the matched filtering and washing plate is symmetrical in double-sided structure, and is replaced with the left and right structures of the washing filter plate, and the small water inlet discharge holes and the water inlet confluence channel of the washing filter plate are changed into the small liquid outlet discharge holes and the liquid outlet confluence channel of the matched filtering and washing plate, as shown in fig. 4; during filtering or washing, the double liquid outlet and water inlet holes are alternately used as double filtrate liquid outlet holes or double washing liquid outlet holes; (3) assembling matched filter plate assemblies: for convenience of explanation, filter cloth closely related to the matched filter plate component is additionally arranged; the cloth clamping distributor is arranged on a filter plate feeding hole to clamp the cloth on the two sides of the filter plate and penetrates through the filter chambers on the two sides of the filter plate; the hole end sealing ring is arranged in a sealing ring groove of the fluid hole; the filter plate is supported by screws in a sliding way and symmetrically arranged at two sides of the filter plate (above the gravity center of the filter plate) to form a washing filter plate component; assembling a matched filtering and washing plate component in the same way; (4) the filtration washing mechanism is assembled: for convenience of explanation, a thrust plate and a pressing plate closely related to the filtering and washing mechanism are additionally arranged; (4.1) installing the anti-corrosion filter plates in a head-to-tail sealing mode: the machine head sealing anti-corrosion filter plate is arranged on the thrust plate, and the machine tail sealing anti-corrosion filter plate is arranged on the pressing plate and is communicated with all fluid inlet and outlet external pipelines; (4.2) mounting of a matched filter plate component: the multiple groups of washing filter plate assemblies and the matched filtering and washing plate assemblies are alternately arranged on the double-filter-plate slide ways by the sliding support of the double filter plates; the filter plates are pressed by a hydraulic oil cylinder of the filter plate pressing mechanism, a plurality of adjacent washing filter plates coated with filter cloth and concave filter cavities of matched filtering and washing plates form a plurality of filter chambers, and each filter chamber is provided with two water inlet holes by the washing filter plates and two liquid outlet holes by the matched filtering and washing plates respectively; the double water inlet holes of the washing filter plate are arranged on the right, the double liquid outlet holes of the matched filtering and washing plate are arranged on the left, and the left and right inlet and outlet holes are staggered, so that the short circuit of washing water flow is effectively avoided, and the filter cake is washed more fully; (4.3) adding a head-to-tail anti-corrosion filter plate and all fluid inlet and outlet external pipelines into the multi-filter chamber to form a filtering and washing mechanism.

The circulating water outlet valve, the water inlet and clean water valve, the filtrate discharge valve (namely the filtrate inlet pool valve), the washing liquid discharge valve and the circulating water inlet valve are DQOF-16C type DN100 electric control pneumatic ball valves.

The utility model discloses the relation of connection of main spare part is: for convenience of explanation, a material mixing pool and a feeding pump with a valve, which are closely related to the filter cake continuous washing system, are additionally arranged; (1) the arrangement of the tank: the material pool and the filtrate pool are respectively arranged on the ground outside the filter press factory building and near the machine head, and the clear water tank and the circulating water tank are arranged behind the filter press in parallel and are close to the machine head; (2) installation of the equipment: the filter press is arranged on the second floor of the factory building and positioned in front of the clean water tank and the circulating water tank, the feed pump with the valve is arranged beside the material pool, and the washing water pump is arranged between the clean water tank and the circulating water tank; (3) and (3) installing a pipeline: (3.1) a material feeding pipeline is communicated with a material tank,

A valved feed pump (including a feed valve) and a filter press feed port (as shown in figure 2); (3.2) the upper end of the special liquid outlet pipeline is connected with the left double liquid outlets of the filter plate of the filter press in parallel, the lower end of the special liquid outlet pipeline is provided with a circulating water outlet valve and a washing liquid discharging valve which are respectively connected with a circulating water tank and a filtering liquid pool in parallel (as shown in figure 1), the upper end of the special liquid outlet pipeline is connected with the right double liquid outlets of the filter plate of the filter press in parallel, and the lower end of the special liquid outlet pipeline is provided with a washing liquid discharging valve which is communicated with the filtering liquid pool (as shown in figure 2); (3.3) the water inlet pipeline is connected with a washing water pump in series, the upper end of the washing water pump is connected with the double water inlet holes on the right side of the filter plate of the filter press in parallel, and the lower end of the washing water pump is provided with a clean water inlet valve and a circulating water inlet valve which are respectively connected with a clean water tank and a circulating water tank in parallel (as shown in figure 1); (4) the material mixing tank, the feed pump with the valve, the filtering and washing mechanism and the feed pipeline form a feed filtering system of the efficient washing and filter pressing unit; the filtering and washing mechanism, the filtrate tank and the liquid outlet pipeline form a liquid outlet system of the high-efficiency washing and filter pressing unit; a filter cake continuous washing system of the efficient washing and pressure filtering unit is composed of a washing water pump, a clear water tank, a circulating water tank, a filtering and washing mechanism, a filter liquor pool, a water inlet pipeline and a special liquid outlet pipeline; various electrical appliances are communicated with a PLC program control system.

The working process of the filter cake continuous washing system is as follows: for ease of illustration, a feed filtration system closely associated with the washing system is added; under the control of the PLC program control system, various valves are automatically opened and closed, and the following procedures are automatically completed by one key; (1) feeding and filtering: after the filter plates are tightly pressed, a feed valve and a filtrate discharge valve are opened, a feed pump with a valve pressurizes and inputs mixed materials in the material pool into a filtering and washing mechanism, so that pressure difference is formed between two sides of filter cloth, low-pressure static filtration is carried out, particles in the materials are intercepted by the filter cloth to form a filter cake in a filter chamber, and filtrate passes through the filter cloth and flows out of a liquid outlet hole to the filtrate pool; (2) washing with clean water for the first time: after the filter liquid flows, opening a clean water inlet valve and a clean water outlet valve, closing a circulating water inlet valve and a washing liquid outlet valve, pumping the clean water in a clean water tank into a multi-filter chamber of a filtering and washing mechanism by a washing water pump, injecting filter cakes in two directions, and performing cross and full washing, wherein the washing water passes through filter cloth and flows to the circulating water tank from a liquid outlet hole; (3) washing with circulating water for the first time: after the washing water flows out of the circulating water tank, the water inlet valve is automatically switched at the same time, the circulating water inlet valve is opened, the clean water inlet valve is closed, the washing water pump continuously pumps the circulating washing water into the filtering and washing mechanism and injects filter cakes, and the washing water flows back to the circulating water tank from the liquid outlet hole after passing through the filter cloth; (4) circulating water exchange: when the pH value (pH value) of the washing water is the same as that of the filter cake, opening a washing liquid discharge valve, and discharging the high-pH washing liquid (including the washing liquid in the circulating water tank) to a filtrate tank; (5) washing with clean water for the second time: when the washing liquid in the circulating water tank is drained, automatically switching the water inlet valve, opening the clean water inlet valve, closing the circulating water inlet valve and the washing liquid discharge valve, and washing the filter cake by using clean water; (6) and (5) washing by circulating water for the second time, and repeating the steps until the PH value or the conductivity of the washing liquid reaches the standard and the washing of the filter cake is finished.

The utility model provides a water-saving filter cake continuous cycle washing system of a high-efficiency washing and filter-pressing unit, the remarkable progress is that the system has the advantages of saving elements, simple and compact structure, less occupied space, optimized washing mode, program control, continuous washing of filter cakes, good washing effect, water saving circulation, four holes for liquid outlet during filtration, double water inlet and double liquid outlet during washing, quick water inlet and liquid outlet and high production efficiency; the beneficial effects are as follows: (1) the structure of the filter cake washing system is simplified, the existing three washing tanks are combined and simplified into a circulating washing water tank, two washing tanks are omitted, and the washing mode is optimized, so that the washing system still maintains and is superior to all functions of the original multi-washing tank type filter cake intermittent washing system; the occupied area of equipment and the investment of a factory building are reduced; (2) by optimizing the washing mode, the existing repeated intermittent washing mode is improved into a continuous circulating washing mode, so that the washing effect and the production efficiency are improved, the washing water is saved, and unexpected technical effects are achieved; fills the blank of a water-saving filter cake continuous circulating washing system of a high-efficiency washing and filter pressing unit in China.

Drawings

FIG. 1 is a schematic view of the water-saving continuous filter cake circulating washing system of the present invention.

FIG. 2 is a schematic diagram of a feed filtration system closely related to the water-saving filter cake continuous circulation washing system of the present invention.

Fig. 3 is a schematic diagram of a washing filter plate of the water-saving filter cake continuous circulation washing system of the present invention.

FIG. 4 is a schematic diagram of the matched filtering and washing plate of the water-saving filter cake continuous circulation washing system of the present invention.

Reference numerals: 1-a feed pump with a valve (namely a feed pump with a feed valve), 2-a circulating water outlet valve, 3-a clean water inlet valve, 4-a filtrate outlet valve (namely a filtrate inlet tank valve), 5-a washing water pump, 6-a washing liquid outlet valve, 7-a circulating water inlet valve, 8-a material tank (namely a material mixing tank), 9-a clean water tank, 10-a circulating water tank (namely a circulating washing water tank), 11-a washing filter plate, 12-a matched filtering plate, 13-a feed hole (namely a series feed hole), 14-a small water inlet hole, 15-a small liquid outlet hole, 16-a double liquid outlet hole (four holes for discharging liquid during filtering, two holes for discharging liquid during washing), 17-a filter cloth, 18-a liquid outlet converging channel, 19-a water inlet converging channel, and 20-a plate frame sealing surface, 21-filter plate pressure bearing table (also used as filter cloth support) and 22-filter screen point surface (namely concave filter cavity screen point surface).

The filtering and washing mechanism comprises 11-washing filter plates, 12-matched filtering and washing plates and 17-filter cloth.

Detailed Description

The technical solution of the embodiment of the present invention will be described below with reference to the accompanying drawings of the embodiment of the water-saving filter cake continuous circulation washing system of the high-efficiency washing and pressure-filtering machine set of the present invention, and the described embodiment is only a part of the preferred embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments without inventive idea made by those skilled in the art, such as a continuous filter cake washing system with the same continuous filter cake circulation washing mode and similar structure, belong to the protection scope of the present invention.

Example 1

A water-saving filter cake continuous circulating washing system (hereinafter referred to as filter cake continuous washing system) of a high-efficiency washing and filter pressing unit; the main points of the overall embodiment of the innovation are: the existing multi-washing tank type intermittent washing system for filter cakes is improved into a water-saving type continuous filter cake circulating washing system, namely a single circulating washing tank water-saving type continuous filter cake circulating washing system which comprises a filtering washing mechanism, a circulating water outlet valve 2, a clean water inlet valve 3, a filtrate external discharge valve 4 (namely a filtrate tank inlet valve), a washing water pump 5, a washing liquid external discharge valve 6, a circulating water inlet valve 7, a material mixing tank 8, a clean water tank 9, a circulating water tank 10 (namely a circulating washing tank), a filtrate tank and various fluid pipelines; the main innovation is as follows: (1) the structure of a filter cake washing system is simplified, and the existing three washing tanks are combined and simplified into a circulating washing water tank 10, so that the structure is simple and compact, and the occupied area of equipment is reduced; two washing tanks are omitted, and the washing mode is optimized, so that the washing tank still keeps and is superior to all functions of the original multi-washing-tank type intermittent washing system for filter cakes; (2) the washing mode is optimized, and the existing multiple intermittent washing mode is improved into a continuous circulating washing mode: (2.1) washing with clean water: firstly, washing filter cakes in a bidirectional and crossed manner by using clear water; (2.2) circulating water washing: after the washing water flows out of the circulating water tank 10, the water inlet valve is automatically switched simultaneously, namely the clean water inlet valve 3 is closed and the circulating water inlet valve 7 is opened, the washing water pump 5 continuously pumps the circulating washing water into the filtering and washing mechanism and injects filter cakes in two directions, and the washing water flows back to the circulating water tank 10 from the liquid outlet hole 16 through the filter cloth 17; (2.3) washing with clean water: when the pH value (pH value) of the washing water is the same as that of the filter cake, discharging the washing liquid with high pH value into a filtrate tank, automatically switching a water inlet valve, and washing the filter cake with clear water; the steps are repeated until the PH value or the conductivity of the washing liquid reaches the standard, and the washing of the filter cake is finished; the continuous washing effect is good, the efficiency is high, the water is saved by the circular washing, and unexpected technical effects are achieved; specific embodiments are described in detail below.

The filtering and washing mechanism, namely a multi-filter chamber pressurizing and filtering and filter cake washing mechanism, is a core mechanism of a washing filter press and mainly comprises a head-tail sealed anticorrosive filter plate, a matched filter plate assembly, filter cloth 17, various fluid inlet and outlet external pipelines and other parts; the matched filter plate component comprises a washing filter plate 11, a matched filtering and washing plate 12, a cloth clamping distributor, a filter plate sliding support and sealing rings at the inlet and outlet ends of each fluid; (1) the washing filter plate 11 is provided with a symmetrical double-sided structure and is provided with a feed hole 13, a small water inlet row hole 14, a liquid outlet and water inlet hole 16 (four holes are used for liquid outlet when the filter chamber is used for filtering, and two holes are used for water inlet and liquid outlet when the filter chamber is used for washing), a water inlet converging channel 19, a plate frame sealing surface 20, a filter plate pressure bearing table 21 (also used as filter cloth support), a concave filter cavity and a filter screen point surface 22 (namely a concave filter cavity screen point surface), as shown in figure 3; during filtering or washing, the double liquid outlet and water inlet holes 16 are alternately used as double liquid outlet holes or double water inlet holes; (2) the matched filter-washing plate 12 is symmetrical in double-sided structure, and is replaced with the left and right structures of the filter-washing plate 11, and the small water inlet discharge holes 14 and the water inlet confluence channel 19 of the filter-washing plate 11 are changed into the small liquid outlet discharge holes 15 and the liquid outlet confluence channel 18 of the matched filter-washing plate 12, as shown in fig. 4; during filtering or washing, the double liquid outlet and water inlet holes 16 are alternately used as double filtrate liquid outlet holes or double washing liquid outlet holes; (3) assembling matched filter plate assemblies: for convenience of explanation, a filter cloth 17 closely related to the matched filter plate component is additionally arranged; the filter cloth 17 is hung on two sides of the washing filter plate 11 and fixed, the cloth clamping distributor is arranged on the filter plate feeding hole 13 to clamp the filter cloth 17 on two sides of the washing filter plate 11 and penetrates through the filter chambers on two sides of the washing filter plate 11; the hole end sealing ring is arranged in a sealing ring groove of the fluid hole; the filter plate is supported and symmetrically arranged at two sides (above the gravity center of the filter plate) of the washing filter plate 11 by screws in a sliding way to form a washing filter plate assembly; assembling a matched filtering and washing plate component in the same way; (4) the filtration washing mechanism is assembled: for convenience of explanation, a thrust plate and a pressing plate closely related to the filtering and washing mechanism are additionally arranged; (4.1) installing the anti-corrosion filter plates in a head-to-tail sealing mode: the machine head sealing anti-corrosion filter plate is arranged on the thrust plate, and the machine tail sealing anti-corrosion filter plate is arranged on the pressure plate and is communicated with all fluid inlet and outlet external pipelines; (4.2) mounting of a matched filter plate component: the multiple groups of washing filter plate assemblies and the matched filtering and washing plate assemblies are alternately arranged on the double-filter-plate slide ways by the aid of the double-filter-plate sliding supports; the washing filter plates 11 and the matched filtering and washing plates 12 are pressed by a hydraulic oil cylinder of the filter plate pressing mechanism, a plurality of adjacent washing filter plates 11 coated with filter cloth 17 and concave filter cavities of the matched filtering and washing plates 12 form a plurality of filter chambers, and each filter chamber is provided with two water inlet holes by the washing filter plates 11 and two washing liquid outlet holes by the matched filtering and washing plates 12 respectively; the double water inlet holes of the washing filter plate 11 are arranged on the right, the double liquid outlet holes of the matched filtering and washing plate 12 are arranged on the left, the left and right of the inlet and outlet holes are staggered, so that the short circuit of washing water flow is effectively avoided, and the filter cake is washed more fully; (4.3) adding a head-to-tail anti-corrosion filter plate and all fluid inlet and outlet external pipelines into the multi-filter chamber to form a filtering and washing mechanism; used for pressurizing and filtering materials to realize solid-liquid separation, alternately washing filter cakes and realizing filter cake purification or fully recovering valuable mother liquor.

The circulating water outlet valve 2, the water inlet and clean water valve 3, the filtrate discharge valve 4 (namely a filtrate inlet pool valve), the washing liquid discharge valve 6 and the circulating water inlet valve 7 are DQOF-16C type DN100 electric control pneumatic ball valves; various valves are respectively arranged on the existing pipelines; (1) the feeding pipeline is communicated with the material pool 8, the feeding pump 1 with a valve (comprising a feeding valve) and the feeding hole 13 of the filter press (shown in figure 2); (2) the upper end of the special liquid outlet pipeline is connected with the left double liquid outlets of the filter plate of the filter press in parallel, the lower end of the special liquid outlet pipeline is provided with a circulating water outlet valve 2 and a washing liquid discharging valve 6 which are respectively connected with a circulating water tank 10 and a filtering liquid pool in parallel (as shown in figure 1), the upper end of the special liquid outlet pipeline is connected with the right double liquid outlets of the filter plate of the filter press in parallel, and the lower end of the special liquid outlet pipeline is provided with the washing liquid discharging valve 6 which is communicated with the filtering liquid pool (as shown in figure 2); (3) the water inlet pipeline is connected with a washing water pump 5 in series, the upper end of the washing water pump is connected with double water inlet holes on the right side of a filter plate of a filter press in parallel, and the lower end of the washing water pump is provided with a clean water inlet valve 3 and a circulating water inlet valve 7 which are respectively connected with a clean water tank 9 and a circulating water tank 10 in parallel (as shown in figure 1); for orderly controlling the inlet and outlet of different fluids.

Setting and final assembly of related facilities of the filter cake continuous washing system: for convenience of explanation, a material mixing tank 8 and a feeding pump 1 with a valve, which are closely related to the filter cake continuous washing system, are additionally arranged; (1) the arrangement of the tank: the material pool 8 and the filtrate pool are respectively arranged on the ground outside the filter press factory building and near the machine head, and the clear water tank 9 and the circulating water tank 10 are arranged behind the filter press side by side and are close to the machine head; (2) installation of the equipment: the filter press is arranged on the second floor of the factory building (a filter cake loading device is reserved on the first floor below the filter press) and is positioned in front of the clean water tank 9 and the circulating water tank 10, the feed pump 1 with the valve is arranged beside the material pool 8, and the washing water pump 5 is arranged between the clean water tank 9 and the circulating water tank 10; (3) the material mixing tank 8, the feed pump with valve 1, the filtering and washing mechanism and the feed pipeline form a feed filtering system of the efficient washing and filter pressing unit; the filter washing mechanism, the filtrate tank and the liquid outlet pipeline form a liquid outlet system of the high-efficiency washing and filter pressing unit; a filter cake continuous washing system of the high-efficiency washing and pressure filtering unit is composed of a washing water pump 5, a clear water tank 9, a circulating water tank 10, a filtering and washing mechanism, a filtrate pool, a water inlet pipeline and a special liquid outlet pipeline; various electrical appliances are communicated with a PLC program control system.

The utility model provides a water-saving filter cake continuous cycle washing system of a high-efficiency washing and filter-pressing unit, which has the advantages of saving elements, simple and compact structure, less occupied space, optimized washing mode, program control, continuous washing of filter cakes, good washing effect, water saving circulation, four-hole liquid discharge during filtering, double water inlet and double liquid discharge during washing, quick water inlet and liquid discharge and high production efficiency; the technical problems that a filter cake washing system is complex in structure, large in occupied area, various in intermittent washing method procedures, low in washing effect and efficiency and high in water consumption due to the mode of multiple washing tanks are solved; the investment of a factory building is reduced, the washing water is saved, and unexpected technical effects are achieved; fills the blank of a water-saving filter cake continuous circulating washing system of a high-efficiency washing and filter pressing unit in China.

Example 2

The utility model discloses the work process of water conservation formula filter cake continuous cycle washing system of high-efficient washing filter press unit is: for ease of illustration, a feed filtration system closely associated with the washing system is added; under the control of the PLC program control system, various valves are automatically opened and closed, and the following procedures are automatically completed by one key.

The first step, feeding and filtering: after the filter plates are tightly pressed, the feed valve 1 and the filtrate discharge valve 4 are opened, the mixed materials in the material pool 8 are pressurized and input into the filtering and washing mechanism by the feed pump 1 with the valve, so that pressure difference is formed between two sides of the filter cloth 17, low-pressure static filtration is carried out, particles in the materials are intercepted by the filter cloth 17 to form a filter cake in a filter chamber, and the filtrate passes through the filter cloth 17 and flows out of the liquid outlet hole 16 to the filtrate pool.

Step two, washing with clean water for one time: after the filtrate flows, the clean water inlet valve 3 and the circulating water outlet valve 2 are opened, the circulating water inlet valve 7 and the washing liquid discharge valve 6 are closed, the washing water pump 5 pumps the clean water in the clean water tank 9 into the multi-filter chamber of the filtering and washing mechanism, filter cakes are injected in two directions for cross and full washing, and the washing water flows from the liquid outlet hole 16 to the circulating water tank 10 through the filter cloth 17.

Step three, washing with primary circulating water: after the washing water flows out of the circulating water tank 10, the water inlet valve is automatically switched at the same time, the circulating water inlet valve 7 is opened, the clean water inlet valve 3 is closed, the washing water pump 5 continuously pumps the circulating washing water into the filtering and washing mechanism and injects filter cakes, and the washing water flows back to the circulating water tank 10 from the liquid outlet hole 16 through the filter cloth 17.

Step four, circulating water exchange: when the pH value (pH value) of the washing water is the same as that of the filter cake, the washing liquid discharge valve 6 is opened, and the washing liquid with a high pH value (including the washing liquid in the circulating water tank) is discharged to the filtrate tank.

Step five, washing with clean water for the second time: when the washing liquid in the circulating water tank 10 is drained, the water inlet valve is automatically switched, the clean water inlet valve 3 is opened, the circulating water inlet valve 7 and the washing liquid discharge valve 6 are closed, the filter cake is washed by clean water, and the washing water flows back to the circulating water tank 10 from the liquid outlet hole 16 through the filter cloth 17.

Sixthly, washing by circulating water for the second time, and repeating the steps until the PH value or the conductivity of the washing liquid reaches the standard and the washing of the filter cake is finished; then, the next operation process of the high-efficiency washing filter press unit is carried out.

The utility model provides a water conservation formula filter cake continuous cycle washing system of high-efficient washing filter press unit, its beneficial effect is: (1) the structure of the filter cake washing system is simplified, the existing three washing tanks are combined and simplified into a circulating washing water tank 10, two washing tanks are omitted, and the washing mode is optimized, so that the washing system still maintains and is superior to all functions of the original multi-washing tank type filter cake intermittent washing system; the occupied area of equipment and the investment of a factory building are reduced; (2) by optimizing the washing mode, the existing repeated intermittent washing mode is improved into a continuous circulating washing mode, so that the washing effect and the production efficiency are improved, the washing water is saved, and unexpected technical effects are achieved; fills the blank of a water-saving filter cake continuous circulating washing system of a high-efficiency washing and filter pressing unit in China.

Claims

1. A water-saving filter cake continuous circulating washing system of a high-efficiency washing and filter-pressing unit comprises a filtering washing mechanism, a circulating water outlet valve, a clean water inlet valve, a filtrate discharge valve, a washing water pump, a washing liquid discharge valve, a circulating water inlet valve, a material mixing pool, a clean water tank, a circulating water tank, a filtrate pool and various fluid pipelines; the method is characterized in that: the filtration washing mechanism, namely the multi-filter chamber pressure filtration and filter cake washing mechanism, mainly comprises an end-to-end sealed anticorrosion filter plate, a matched filter plate component, filter cloth and external pipelines for inlet and outlet of each fluid, wherein the matched filter plate component comprises a washing filter plate, a matched filtering and washing plate, a cloth clamping distributor, a filter plate sliding support and a sealing ring at the end of each fluid inlet and outlet hole; the circulating water outlet valve, the water inlet clean water valve, the filtrate discharge valve (namely the filtrate inlet pool valve), the washing liquid discharge valve and the circulating water inlet valve are DQOF-16C type DN100 electric control pneumatic ball valves; the interconnection relationship is: the material pool and the filtrate pool are respectively arranged on the ground outside the filter press factory building and near the machine head, and the clear water tank and the circulating water tank are arranged behind the filter press in parallel and are close to the machine head; the filter press is arranged on the second floor of the factory building and positioned in front of the clean water tank and the circulating water tank, the feed pump with the valve is arranged beside the material pool, and the washing water pump is arranged between the clean water tank and the circulating water tank; a material pool, a feed pump with a valve and a feed hole of a filter press are communicated in series by a feed pipeline; the upper end of a special liquid outlet pipeline is connected with the left double liquid outlet holes of the filter plate of the filter press in parallel, and the lower end of the special liquid outlet pipeline is provided with a circulating water outlet valve and a washing liquid discharge valve which are respectively connected with a circulating water tank and a filtrate tank in parallel; the upper end of the liquid outlet pipeline for the wheel is connected with the double liquid outlet holes on the right side of the filter plate of the filter press in parallel, and the lower end of the liquid outlet pipeline is communicated with the filtrate pool with a washing liquid discharge valve; a water inlet pipeline is connected in series with a washing water pump, the upper end of the washing water pump is connected in parallel with double water inlet holes on the right side of a filter plate of the filter press, and the lower end of the washing water pump is provided with a clean water inlet valve and a circulating water inlet valve which are respectively connected in parallel with a clean water tank and a circulating water tank; the filtering and washing mechanism, the filtrate tank and the liquid outlet pipeline form a liquid outlet system of the high-efficiency washing and filter pressing unit; a washing water pump, a clean water tank, a circulating water tank, a filtering and washing mechanism, a filtrate tank, a water inlet pipeline and a special liquid outlet pipeline form a water-saving filter cake continuous circulating washing system of the efficient washing and filter pressing unit; various electrical appliances are communicated with a PLC program control system; two washing tanks are omitted, and the washing mode is optimized, so that the washing system still maintains and is superior to all functions of the original multi-washing-tank type intermittent washing system for filter cakes.

2. The water-saving filter cake continuous circulating washing system of the high-efficiency washing and filter-pressing unit according to claim 1, characterized in that: the washing filter plate is symmetrical in double-sided structure and is provided with a feed inlet, a small water inlet discharge hole, a liquid outlet and water inlet hole, a water inlet converging channel, a plate frame sealing surface, a filter plate pressure bearing table, a concave filter cavity and a filter screen point surface; when filtering or washing, the double liquid outlet holes and the double water inlet holes are alternately used as double liquid outlet holes or double water inlet holes.

3. The water-saving filter cake continuous circulating washing system of the high-efficiency washing and filter-pressing unit according to claim 1, characterized in that: the matched filtering and washing plate has a symmetrical double-sided structure, is replaced with a left structure and a right structure of the washing filter plate, and changes a small water inlet discharge hole and a water inlet converging channel of the washing filter plate into a small liquid outlet discharge hole and a liquid outlet converging channel of the matched filtering and washing plate; during filtering or washing, the double liquid outlet and water inlet holes are alternately used as double filtrate liquid outlet holes or double washing liquid outlet holes.

4. The water-saving filter cake continuous circulating washing system of the high-efficiency washing and filter-pressing unit according to claim 1, characterized in that: the matched filter plate component comprises a washing filter plate component and a matched filtering and washing plate component; the mutual relation of all the components of the washing filter plate assembly is as follows: the cloth clamping distributor is arranged on a filter plate feed hole to clamp the filter cloth on the two sides of the filter plate and penetrates through the filter chambers on the two sides of the filter plate; the hole end sealing ring is arranged in a sealing ring groove of the fluid hole; the filter plate is symmetrically arranged at two sides of the filter plate and above the gravity center of the filter plate by utilizing screws to slide and support the filter plate, so that a washing filter plate assembly is formed; and assembling a matched filtering and washing plate component.

5. The water-saving filter cake continuous circulating washing system of the high-efficiency washing and filter-pressing unit according to claim 1, characterized in that: the mutual relation of all the components of the filtering and washing mechanism is as follows: the machine head sealing anti-corrosion filter plate is arranged on the thrust plate, and the machine tail sealing anti-corrosion filter plate is arranged on the pressing plate and is communicated with all fluid inlet and outlet external pipelines; the multiple groups of washing filter plate assemblies and the matched filtering and washing plate assemblies are alternately arranged on the double-filter-plate slide ways by the aid of the double-filter-plate sliding supports; the filter plates are pressed by a hydraulic oil cylinder of the filter plate pressing mechanism, a plurality of adjacent washing filter plates coated with filter cloth and concave filter cavities of matched filtering and washing plates form a plurality of filter chambers, and each filter chamber is provided with two water inlet holes by the washing filter plates and two liquid outlet holes by the matched filtering and washing plates; the double water inlet holes of the washing filter plate are arranged on the right, the double liquid outlet holes of the matched filtering and washing plate are arranged on the left, and the left and right inlet and outlet holes are staggered, so that the short circuit of washing water flow is effectively avoided, and the filter cake is washed more fully; the multi-filter chamber is provided with a head-tail anti-corrosion filter plate and all the fluids enter and exit an external pipeline, thus forming a filtering and washing mechanism.