CN108654177B - Belt filter press - Google Patents
Belt filter press Download PDFInfo
- Publication number
- CN108654177B CN108654177B CN201810638326.5A CN201810638326A CN108654177B CN 108654177 B CN108654177 B CN 108654177B CN 201810638326 A CN201810638326 A CN 201810638326A CN 108654177 B CN108654177 B CN 108654177B
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- filter
- upper pressing
- filter cloth
- groove
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- 239000004744 fabric Substances 0.000 claims abstract description 91
- 239000000706 filtrate Substances 0.000 claims abstract description 44
- 239000000463 material Substances 0.000 claims abstract description 24
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 59
- 239000007788 liquid Substances 0.000 claims description 39
- 238000001914 filtration Methods 0.000 claims description 37
- 238000005406 washing Methods 0.000 claims description 36
- 238000007789 sealing Methods 0.000 claims description 21
- 230000000712 assembly Effects 0.000 claims description 16
- 238000000429 assembly Methods 0.000 claims description 16
- 238000007599 discharging Methods 0.000 claims description 11
- 238000011084 recovery Methods 0.000 claims description 6
- 239000007921 spray Substances 0.000 claims description 3
- 239000008237 rinsing water Substances 0.000 claims description 2
- 238000000926 separation method Methods 0.000 abstract description 12
- 230000008901 benefit Effects 0.000 abstract description 9
- 239000012065 filter cake Substances 0.000 description 14
- 239000002893 slag Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000001125 extrusion Methods 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/04—Filters with filtering elements which move during the filtering operation with filtering bands or the like supported on cylinders which are impervious for filtering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/44—Regenerating the filter material in the filter
- B01D33/48—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention provides a belt filter press; comprises an upper filter cloth, a lower filter cloth and a main filter assembly; the main filter assembly comprises a first upper pressing plate capable of moving up and down and a first lower supporting plate at a fixed position, a first upper pressing groove is formed in the lower end face of the first upper pressing plate, a first lower groove is formed in the upper end face of the first lower supporting plate, corresponding to the first upper pressing groove, a first filtrate channel penetrating through the first lower supporting plate is formed in the bottom of the first lower groove, filtrate is discharged out of the main filter assembly through the first filtrate channel, and a first conveying channel for filter materials to pass through is formed by the first upper pressing groove of the first upper pressing plate and the first lower groove of the first lower supporting plate; the upper filter cloth and the lower filter cloth are driven in a tensioning way through a plurality of rollers, and both the upper filter cloth and the lower filter cloth pass through a first conveying channel of the main filter assembly. The belt filter press not only maintains the advantage of high separation efficiency of the plate-and-frame filter press, but also has the advantages of high automation degree and low labor intensity.
Description
Technical Field
The invention belongs to the technical field of solid-liquid separation, and particularly relates to a belt filter press.
Background
The solid-liquid separation is a very common technological process in the operation of chemical units, and at present, commonly used separation equipment comprises a plate-and-frame filter press, a vacuum belt filter, a belt filter press and the like.
Compared with the vacuum belt filter and the belt filter, the plate-and-frame filter press has the advantages of low operation energy consumption, high separation efficiency, filter residue water content and the like, and has the defects of high labor intensity and low equipment automation degree. Although the prior plate-and-frame filter press with an automatic pull plate is adopted, the cleaning and the disassembly of the filter cloth are required to be completed manually, so the labor intensity is still high. The vacuum belt filter and the belt filter press have the advantages of continuous operation, high equipment automation degree, low labor intensity, high operation energy consumption, poor separation efficiency and high water content of filter residues.
In comparison with belt filter presses, vacuum belt filters have only one bed of filter cloth, the pressure difference across the filter cloth being from the pressure difference between atmospheric pressure and vacuum. The belt filter press consists of an upper filter cloth and a lower filter cloth, the slurry is distributed between the two layers of filter cloth, and the water in the slurry is removed by the extrusion force between the two layers of filter cloth and the compression roller. The two have the common advantages of high equipment automation degree and low labor intensity; the common defects of the two are that the separation efficiency is poor, and the water content of filter residues is high.
Although the plate-and-frame filter press has the disadvantage of high labor intensity, the plate-and-frame filter press has high separation efficiency, and the water content of the obtained filter residues is low, so that the plate-and-frame filter press is still widely used and cannot be replaced in many occasions due to the advantage.
The plate-and-frame filter press has the advantages that the separation efficiency is high, the water content of the obtained filter residues is low, the filter pressure is high, the pressure difference on two sides of the filter cloth is large, the filter cloth is static in the filtering process, the filter cake is formed, if the plate-and-frame filter press filters, the filter cake is dried by compressed air, and the water content of the filter cake can be further reduced. The water content of the filter cake obtained by the plate-and-frame filter press is slightly different according to different materials, and is generally in the range of 50% -60%.
The pressure difference across the filter cloth of the vacuum belt filter results from a pressure difference between atmospheric pressure and vacuum, which is typically 0.4 to 0.6 atmospheres, i.e. the pressure difference across the filter cloth is only 0.04 to 0.06MPa. The pressure difference of both sides of the filter cloth of the plate-and-frame filter press comes from the pressure head of the feed pump, and in general, the lift of the feed pump of the plate-and-frame filter press is 50 meters, so that the pressure difference of both sides of the filter cloth can reach 0.5MPa, which is ten times or so that of the vacuum belt filter.
The filtration process of the belt filter press is dynamic and the pressure difference is low, so that the filter cake formed by the solid phase has high water content, and some can not form a filter cake. The belt filter press is used for dehydrating slurry, and comprises a gravity dewatering area and an extrusion dewatering area at the front and back. In the gravity dewatering area, the pressure difference at two sides of the filter cloth is only the gravity of the material; in the extrusion dewatering area, the upper and lower layers of filter cloth are dewatered under the extrusion of a press roller, and the water content of filter residues obtained by the belt filter press is about 80%.
The plate-and-frame filter press has the defects that the full period of filtration is long, the proportion of the full period of filtration is too low, and the proportion of the full period of the slag discharge period is too high. Taking the existing plate-and-frame filter press as an example, the full period of filtration is about 4 hours, 0.5 hour is taken from feeding to compacting of filter cakes and drying of compressed air, and 3.5 hours are taken for deslagging and washing of filter cloth. If a platen frame filter press has 40 filter plates, the 40 filter plates need to be disassembled one by one for discharging slag and the filter cloth needs to be washed one by one for laying filter cloth, so that a great deal of time is occupied. The structural style of the existing plate and frame filter press determines the situation and cannot be improved.
With the technical progress, the industrial automation degree is continuously improved, and the equipment with high operation labor intensity is eliminated from the market, so that the equipment is a necessary trend. In the field of solid-liquid separation, a novel device is needed, so that the high efficiency of a plate-and-frame filter press can be maintained, the high automation degree and the low operation labor intensity of a belt filter press are realized, even unmanned operation can be realized, and the development of the device becomes an urgent requirement.
Disclosure of Invention
The technical problem to be solved by the invention is to provide the belt filter press which can continuously run and has low labor intensity.
In order to solve the technical problems, the invention provides a belt filter press;
at least comprises an upper filter cloth, a lower filter cloth and a main filter assembly;
The main filter assembly comprises a first upper pressing plate capable of moving up and down and a first lower supporting plate at a fixed position, a first upper pressing groove is formed in the lower end face of the first upper pressing plate, a first lower groove is formed in the upper end face of the first lower supporting plate, corresponding to the first upper pressing groove, a first filtrate channel penetrating through the first lower supporting plate is formed in the bottom of the first lower groove, filtrate is discharged out of the main filter assembly through the first filtrate channel, and a first conveying channel for filter materials to pass through is formed by the first upper pressing groove of the first upper pressing plate and the first lower groove of the first lower supporting plate;
the upper filter cloth and the lower filter cloth are driven in a tensioning way through a plurality of rollers, and both the upper filter cloth and the lower filter cloth pass through a first conveying channel of the main filter assembly.
With the structure, in the filtering process, the filtering condition of the belt filter press is the same as that of the plate-and-frame filter press, so that the separation efficiency is the same as that of the plate-and-frame filter press, and the water content of the obtained filter cake is necessarily the same as that of the plate-and-frame filter press; the belt filter press can realize continuous automatic deslagging and automatic cleaning of filter cloth, when the plate-and-frame filter press is used for deslagging, the filter plates are required to be pulled one by one, deslagging is carried out gradually, deslagging period is slow, the occupied time of deslagging period is too long, compared with the plate-and-frame filter press, the time occupied by deslagging and filter washing is very small, most of the time belongs to the filtering period, and the automation degree of equipment is greatly improved; the belt filter press not only maintains the advantage of high separation efficiency of the plate-and-frame filter press, but also has the advantages of high automation degree and low labor intensity.
The first lower support plate of the belt filter press is internally provided with a first liquid collecting cavity, the bottom of the first lower groove is provided with a plurality of first diversion holes communicated with the first liquid collecting cavity, the first lower support plate is also provided with a first liquid discharging hole communicated with the first liquid collecting cavity and the lower side of the first lower support plate, and the first diversion holes, the first liquid collecting cavity and the first liquid discharging hole form a first filtrate channel for filtrate to pass through; after the structure is adopted, the first lower supporting plate structure is optimized, and the purpose of leading away filtrate to the maximum extent of the first filtrate channel is realized.
The lower end surfaces of the first upper pressing plates positioned at two sides of the first upper pressing groove in the belt filter press are respectively provided with sealing strips, and the upper end surfaces of the first lower supporting plates positioned at two sides of the first lower groove are respectively provided with sealing strips;
and a plurality of first guide edges are arranged at the bottom of the first lower groove upwards.
After adopting such structure, sealing effect when sealing strip improves first top board and first bottom suspension fagging cooperation, and first water conservancy diversion arris can play the purpose of dredging the filtrate.
The belt filter press further comprises at least one group of auxiliary filter components, wherein each auxiliary filter component comprises a second upper pressing plate and a second lower supporting plate, the second upper pressing plate and the second lower supporting plate are synchronously moved with the first upper pressing plate, a second upper pressing groove is formed in the lower end face of the second upper pressing plate, a second lower groove is formed in the position, corresponding to the second upper pressing groove, of the upper end face of the second lower supporting plate, a second filtrate channel penetrating through the second lower supporting plate is formed in the bottom of the second lower groove, filtrate is discharged out of the auxiliary filter components through the second filtrate channel, and the second upper pressing groove of the second upper pressing plate and the second lower groove of the second lower supporting plate form a second conveying channel for a filter material to pass through;
The start end of the second conveying channel of the auxiliary filtering component is communicated with the end of the first conveying channel of the main filtering component, and the upper filter cloth and the lower filter cloth also pass through the second conveying channel of the auxiliary filtering component.
After adopting such structure, the auxiliary filter assembly can cooperate the main filter assembly to jointly realize the purpose of filtering the filter material, and the auxiliary filter assembly can promote the filtration efficiency of this belt filter press greatly moreover.
The second lower support plate of the belt filter press is internally provided with a second liquid collecting cavity, the bottom of the second lower groove is provided with a plurality of second diversion holes communicated with the second liquid collecting cavity, the second lower support plate is also provided with a second liquid discharging hole communicated with the second liquid collecting cavity and the lower side of the second lower support plate, and the second diversion holes, the second liquid collecting cavity and the second liquid discharging hole form a second filtrate channel for filtrate to pass through; after the structure is adopted, the second lower supporting plate structure is optimized, and the purpose of collecting filtrate to the greatest extent of the second filtrate channel is achieved.
The lower end surfaces of the second upper pressing plates positioned at two sides of the second upper pressing groove in the belt filter press are respectively provided with sealing strips, and the upper end surfaces of the second lower supporting plates positioned at two sides of the second lower groove are respectively provided with sealing strips;
And a plurality of second guide edges are arranged at the bottom of the second lower groove upwards.
After adopting such structure, sealing effect when sealing strip improves second top board and the cooperation of second bottom suspension fagging, and the second water conservancy diversion arris can play the purpose of dredging the filtrate.
The second upper pressing plate of the belt filter press is internally provided with a buffer cavity, a pipeline which is vertically and horizontally communicated is arranged in the buffer cavity, a plurality of downward nozzles are arranged in the pipeline, a plurality of small holes which are communicated with the second upper pressing groove are also arranged on the lower side cavity wall of the buffer cavity corresponding to the nozzles of the pipeline, and the pipeline is communicated with the outside through a connecting pipe; after the structure is adopted, the connecting pipe is connected with the high-pressure air source, and the high-pressure air source can blow the filter cake to dry through the nozzle of the pipeline and the small hole of the second upper pressing plate, so that the water content of the filter cake is further reduced; the connecting pipe is communicated with a high-pressure water source to carry out water washing operation on the filter cake in the second filtrate channel.
The full period of the belt filter press can be divided into a filtering period and a deslagging period, the deslagging period occupies a very low proportion of the full period, and if the filtering period is still estimated according to 0.5 hour, the deslagging period can be decomposed into the following actions: the first upper pressing plate and the second upper pressing plate are lifted, the filter cloth is moved to remove slag, the filter cloth is moved, the filter cloth is washed, the filter cloth is stopped to move, and the first upper pressing plate and the second upper pressing plate are compressed again, so that the occupied time is not more than 1 minute. It is the ingenious structural style of belt filter press that solves and arranges the excessive problem of sediment cycle ratio.
The belt filter press further comprises a water washing assembly, the number of the auxiliary filter assemblies is a plurality of groups, the auxiliary filter assemblies are sequentially arranged step by step, the auxiliary filter assemblies adjacent to the main filter assembly are primary auxiliary filter assemblies, the initial end of a second conveying channel of each primary auxiliary filter assembly is communicated with the tail end of a first conveying channel of the main filter assembly, the second conveying channels of any two adjacent auxiliary filter assemblies are communicated, and a connecting pipe of each final auxiliary filter assembly is connected with a high-pressure water source;
The water washing assembly comprises a recovery tank, at least one water pump and a plurality of water washing collecting tanks, wherein the tail end of a first filtrate channel of the main filtering assembly is communicated with the recovery tank, the plurality of water washing collecting tanks are in one-to-one correspondence with the plurality of auxiliary filtering assemblies, a water inlet of each water washing collecting tank is communicated with the tail end of a second filtrate channel of the corresponding auxiliary filtering assembly, a water outlet of each water washing collecting tank is communicated with a connecting pipe of the auxiliary filtering assembly of the previous stage, and the water pumps are respectively arranged on pipelines between the water outlet of each water washing collecting tank and the connecting pipe of the auxiliary filtering assembly.
After the structure is adopted, the belt filter press can finish reverse water washing operation on filter materials by utilizing the water washing assembly.
The upper filter cloth and the lower filter cloth of the belt filter press are correspondingly provided with spray rinsing water tanks; after adopting such structure, spray the washing water tank and can carry out self-cleaning to last filter cloth and lower filter cloth, facilitate the use.
The belt filter press further comprises a feeding pipe, the feeding pipe is arranged at the beginning end of the first conveying channel of the main filter assembly, the feeding pipe is positioned between the upper filter cloth and the lower filter cloth, and a discharging hole is formed in the feeding pipe; after adopting such structure, when the top board compresses tightly, upper and lower filter cloth, top inlet pipe, the filter cake of terminal stay on the filter cloth just can form airtight filter chamber, makes the filtration process can pressurize and accomplish, promotes this belt filter press's filter effect.
Drawings
Fig. 1 is a cross-sectional view of a schematic construction of an embodiment of the present belt filter press.
Fig. 2is a cross-sectional view taken along A-A of fig. 1.
Fig. 3 is a cross-sectional view of a schematic of a first lower support plate of an embodiment of the belt filter.
Fig. 4 is a cross-sectional view of a schematic of a first upper platen of an embodiment of the present belt filter press.
Fig. 5 is a cross-sectional view of a schematic of a second lower support plate of an embodiment of the present belt filter.
Fig. 6 is a cross-sectional view of a schematic diagram of a second construction of an embodiment of the belt filter press.
Detailed Description
Example 1
As shown in fig. 1 and 5
The belt filter press comprises an upper filter cloth 3, a lower filter cloth 4, a group of main filter components and a group of auxiliary filter components.
The main filter assembly comprises a first upper pressing plate 11 capable of moving up and down and a first lower supporting plate 12 at a fixed position, a first upper pressing groove 11a is formed in the lower end face of the first upper pressing plate 11, the first upper pressing groove 11a extends to the left end face and the right end face of the first upper pressing plate 11, a first lower groove 12a is formed in the upper end face of the first lower supporting plate 12 corresponding to the position of the first upper pressing groove 11a, the first lower groove 12a also extends to the left end face and the right end face of the first lower supporting plate 12, a first liquid collecting cavity 12b is formed in the first lower supporting plate 12 at the lower side of the first lower groove 12a, a plurality of first diversion holes 12c communicated with the first liquid collecting cavity 12b are formed in the bottom of the first lower groove 12a, a plurality of first liquid draining holes (not shown in the figure) communicated with the first liquid collecting cavity 12b are formed in the first lower supporting plate 12a, a plurality of first diversion ribs 12d are formed in the bottom of the first lower groove 12a upwards direction, the first liquid collecting cavity 12b and the first liquid draining holes form a first filtrate channel for passing through the first filtrate, and the first filtrate channel is drained out of the main filter assembly through the main filter assembly;
Sealing strips (not shown in the figure) are respectively arranged on the lower end surfaces of the first upper pressing plates 11 positioned on two sides of the first upper pressing groove 11a, and sealing strips are respectively arranged on the upper end surfaces of the first lower supporting plates 12 positioned on two sides of the first lower groove 12 a;
The first upper pressing groove 11a of the first upper pressing plate 11 and the first lower groove 12a of the first lower supporting plate 12 constitute a first conveying passage 13 through which the filter material passes.
The auxiliary filter assembly comprises a second upper pressing plate 21 which moves synchronously with the first upper pressing plate 11 and a second lower supporting plate 22 at a fixed position, a second upper pressing groove 21a is arranged on the lower end surface of the second upper pressing plate 21, the second upper pressing groove 21a extends to the left and right end surfaces of the second upper pressing plate 21, a buffer cavity 21b is arranged in the second upper pressing plate 21 at the upper side of the second upper pressing groove 21a,
The buffer cavity 21b is internally provided with a pipeline 21d which is vertically and horizontally communicated, the pipeline 21d is provided with a plurality of downward nozzles, the lower side cavity wall of the buffer cavity 21b is also provided with a plurality of small holes 21c which are communicated with the second upper pressing groove 21a corresponding to the nozzles of the pipeline 21d, the pipeline 21d is communicated with the outside (not shown in the figure) through a connecting pipe, and the connecting pipe is communicated with a high-pressure air source or a high-pressure water source.
The upper end face of the second lower supporting plate 22 is provided with a second lower groove 22a corresponding to the position of the second upper pressing groove 21a, the second lower groove 22a extends to the left end face and the right end face of the second lower supporting plate 22, a second liquid collecting cavity 22b is arranged in the second lower supporting plate 22 at the lower side of the second lower groove 22a, the bottom of the second lower groove 22a is provided with a plurality of second diversion holes 22c communicated with the second liquid collecting cavity 22b, the second lower supporting plate 22 is also provided with a second liquid draining hole (not shown) communicated with the second liquid collecting cavity 22b and the lower side of the second lower supporting plate 22, the bottom of the second lower groove 22a is upwards provided with a plurality of second diversion ribs 22d, the second filtrate channel for filtrate to pass through is formed by the second diversion holes 22c, the second liquid collecting cavity 22b and the second liquid draining hole, and filtrate is drained out of the auxiliary filtering assembly through the second filtrate channel.
The second upper pressing groove 21a of the second upper pressing plate 21 and the second lower groove 22a of the second lower supporting plate 22 form a second conveying passage 23 through which the filter material passes, and the beginning (left end) of the second conveying passage 23 of the auxiliary filter assembly is communicated with the end (right end) of the first conveying passage 13 of the main filter assembly.
The lower end surfaces of the second upper pressing plates 21 positioned at the two sides of the second upper pressing groove 21a are respectively provided with sealing strips, and the upper end surfaces of the second lower supporting plates 22 positioned at the two sides of the second lower groove 22a are respectively provided with sealing strips;
The upper filter cloth 3 and the lower filter cloth 4 are driven to rotate by a transmission mechanism formed by a plurality of rollers 5 (the rotation direction of the upper filter cloth 3 in the figure 1 is anticlockwise, the rotation direction of the lower filter cloth 4 in the figure 1 is clockwise), the upper filter cloth 3 and the lower filter cloth 4 pass through a first conveying passage 13 of the main filter assembly and a second conveying passage 23 of the auxiliary filter assembly, the front and rear directions of the upper filter cloth 3 and the lower filter cloth 4 respectively extend out of the main filter assembly and the auxiliary filter assembly (in practice, the width of the upper filter cloth 3 and the lower filter cloth 4 in the front and rear directions is not smaller than the width of the main filter assembly and the auxiliary filter assembly), and a water washing tank 6 for washing slag 9 on the filter cloth can be arranged on the running track of the upper filter cloth 3 and the lower filter cloth 4.
The inlet pipe 7 stretches to the first conveying channel 13 initial end (left end) of main filter assembly, and inlet pipe 7 is located between upper filter cloth 3 and lower filter cloth 4, and the last discharge gate that opens of inlet pipe 7.
When the filter works, the first upper pressing plate 11 of the main filter assembly and the second upper pressing plate 21 of the auxiliary filter assembly are positioned at the maximum stroke position on the upper side, the upper filter cloth 3 and the lower filter cloth 4 rotate, the filter material enters between the upper filter cloth 3 and the lower filter cloth 4 through the feeding pipe 7, when the filter material is firstly filled in the area of the first conveying channel 13 between the upper filter cloth 3 and the lower filter cloth 4, the upper filter cloth 3 and the lower filter cloth 4 stop rotating, the first upper pressing plate 11 of the main filter assembly and the second upper pressing plate 21 of the auxiliary filter assembly synchronously move downwards, the front and rear parts of the lower end surfaces of the first upper pressing plate 11 of the main filter assembly are contacted with the front and rear parts of the upper end surfaces of the first lower supporting plate 12, the sealing strips of the lower end surfaces of the first upper pressing plate are matched with the sealing strips of the upper end surfaces of the first lower supporting plate, a closed filter chamber is formed by pressing between the first upper pressing plate and the first lower supporting plate, and in the process of downward movement of the second upper pressing plate 21 of the main filter assembly, the filtrate in the first upper pressing plate 11 and the second upper filter cloth 4 of the main filter assembly is discharged outside the filter material through the first filtrate channel;
Then, the first upper pressing plate 11 of the main filter assembly and the second upper pressing plate 21 of the auxiliary filter assembly are started to move upwards to the maximum stroke position, the upper filter cloth 3 and the lower filter cloth 4 rotate, new filter materials enter between the upper filter cloth 3 and the lower filter cloth 4 through the feeding pipe 7, the operation process of the new filter materials is the same as that of the above process, after the filter residues originally in the area of the first conveying channel 13 move to the area of the second conveying channel 23, the filter residues are matched and clamped by the second upper pressing plate 21 of the auxiliary filter assembly and the second lower supporting plate 22, the sealing strip on the lower end surface of the second upper pressing plate is matched with the sealing strip on the upper end surface of the second lower supporting plate, the second upper pressing plate is tightly pressed with the second lower supporting plate to form a closed filter chamber, high-pressure air is introduced into a pipeline 21d in the second upper pressing plate 21 through a connecting pipe, and the high-pressure air is sprayed to the filter residues in the area of the second conveying channel 23 through a plurality of small holes 21c, so that the filter residues can be dried, the water content of the filter residues is further reduced, and the filtrate in the filter residues is discharged out of the main filter assembly through the second filtrate channel of the auxiliary filter assembly;
Starting a first upper pressing plate 11 of the main filter assembly and a second upper pressing plate 21 of the auxiliary filter assembly to move upwards to a maximum stroke position, enabling new filter materials to enter between an upper filter cloth 3 and a lower filter cloth 4 through a feed pipe 7, enabling filter residues originally in the area of a first conveying channel 13 to move to the area of a second conveying channel 23, enabling the filter residues originally in the area of the second conveying channel 23 to be changed into slag materials 9 through the auxiliary filter assembly, and directly discharging the slag materials out of the belt filter press;
So reciprocating, can do continuous filtration operation to the filter material.
After each filtering operation is finished, the upper filter cloth 3 and the lower filter cloth 4 keep a part of filter residues as filter cakes, and the filter cakes can be used as sealing edges.
Example two
As shown in FIG. 6
The difference between this embodiment and the first embodiment is that: the number of the auxiliary filtering components is three;
The three auxiliary filter assemblies are sequentially arranged step by step, the auxiliary filter assemblies adjacent to the main filter assembly are primary auxiliary filter assemblies, the initial end of a second conveying channel of each primary auxiliary filter assembly is communicated with the tail end of a first conveying channel of the main filter assembly, the second conveying channels of any two adjacent auxiliary filter assemblies are communicated, and a connecting pipe of the final auxiliary filter assembly is connected with a high-pressure water source;
The belt filter press further comprises a washing component, the washing component comprises a recovery tank 81, two water pumps 82 and three washing collection tanks 83, the tail end of a first filtrate channel of the main filter component is communicated with the water inlet of the recovery tank 81, the three washing collection tanks 83 are in one-to-one correspondence with the three groups of auxiliary filter components, the water inlet of the washing collection tanks 83 is communicated with the tail end of a second filtrate channel of the corresponding auxiliary filter component, the water outlet of the washing collection tanks 83 is communicated with the connecting pipe of the auxiliary filter component of the previous stage, and the water pumps 82 are respectively arranged on pipelines between the water outlet of the washing collection tanks 83 and the connecting pipe of the auxiliary filter component.
In the reverse washing operation, a connecting pipe of the final-stage auxiliary filter assembly is connected with a high-pressure water source, high-pressure water washes slag materials of a second conveying channel of the final-stage auxiliary filter assembly through small holes of the final-stage auxiliary filter assembly, a washing collecting tank 83 corresponding to the final-stage auxiliary filter assembly collects washed solution, a water pump 82 pumps the washing solution in the washing collecting tank 83 corresponding to the final-stage auxiliary filter assembly out to the connecting pipe of a previous-stage auxiliary filter assembly, and the filter materials of the second conveying channel of the final-stage auxiliary filter assembly are washed by the final-stage auxiliary filter assembly; and by analogy, the solution after washing is collected into a washing collection tank 83 corresponding to the primary auxiliary filter assembly through the three-stage auxiliary filter assembly.
The foregoing is merely illustrative of two embodiments of the invention, and it will be appreciated by those skilled in the art that variations and modifications may be made without departing from the principles of the invention, and it is intended to cover such modifications as fall within the scope of the invention, e.g., as the number of secondary filter elements increases or decreases, etc.
Claims (1)
1. A belt filter press, characterized by:
at least comprises an upper filter cloth, a lower filter cloth and a main filter assembly;
The main filter assembly comprises a first upper pressing plate capable of moving up and down and a first lower supporting plate at a fixed position, a first upper pressing groove is formed in the lower end face of the first upper pressing plate, a first lower groove is formed in the upper end face of the first lower supporting plate, corresponding to the first upper pressing groove, a first filtrate channel penetrating through the first lower supporting plate is formed in the bottom of the first lower groove, filtrate is discharged out of the main filter assembly through the first filtrate channel, and a first conveying channel for filter materials to pass through is formed by the first upper pressing groove of the first upper pressing plate and the first lower groove of the first lower supporting plate;
the upper filter cloth and the lower filter cloth are driven in a tensioning way through a plurality of rollers, and both the upper filter cloth and the lower filter cloth pass through a first conveying channel of the main filter assembly;
the first lower supporting plate is internally provided with a first liquid collecting cavity, the bottom of the first lower groove is provided with a plurality of first diversion holes communicated with the first liquid collecting cavity, the first lower supporting plate is also provided with a first liquid discharging hole communicated with the first liquid collecting cavity and the lower side of the first lower supporting plate, and the first diversion holes, the first liquid collecting cavity and the first liquid discharging hole form a first filtrate channel for filtrate to pass through;
Sealing strips are respectively arranged on the lower end surfaces of the first upper pressing plates at two sides of the first upper pressing groove, and sealing strips are respectively arranged on the upper end surfaces of the first lower supporting plates at two sides of the first lower groove;
a plurality of first guide edges are arranged upwards at the bottom of the first lower groove;
The filter material conveying device comprises a first upper pressing plate, a first lower pressing plate, at least one group of auxiliary filter components, a second filter material conveying device and a filter material conveying device, wherein the auxiliary filter components comprise a second upper pressing plate which moves synchronously with the first upper pressing plate and a second lower supporting plate at a fixed position;
The start end of the second conveying channel of the auxiliary filtering component is communicated with the end of the first conveying channel of the main filtering component, and the upper filter cloth and the lower filter cloth also pass through the second conveying channel of the auxiliary filtering component;
the second lower supporting plate is internally provided with a second liquid collecting cavity, the bottom of the second lower groove is provided with a plurality of second diversion holes communicated with the second liquid collecting cavity, the second lower supporting plate is also provided with a second liquid discharging hole communicated with the second liquid collecting cavity and the lower side of the second lower supporting plate, and the second diversion holes, the second liquid collecting cavity and the second liquid discharging hole form a second filtrate channel for filtrate to pass through;
sealing strips are respectively arranged on the lower end surfaces of the second upper pressing plates at two sides of the second upper pressing groove, and sealing strips are respectively arranged on the upper end surfaces of the second lower supporting plates at two sides of the second lower groove;
a plurality of second guide edges are arranged upwards at the bottom of the second lower groove;
A buffer cavity is arranged in the second upper pressing plate, a pipeline which is vertically and horizontally communicated is arranged in the buffer cavity, a plurality of downward nozzles are formed in the pipeline, a plurality of small holes which are communicated with the second upper pressing groove are also formed in the lower side cavity wall of the buffer cavity and correspond to the nozzles of the pipeline, and the pipeline is communicated with the outside through a connecting pipe;
The water washing device further comprises a water washing assembly, the number of the auxiliary filtering assemblies is a plurality of groups, the auxiliary filtering assemblies are sequentially arranged step by step, the auxiliary filtering assemblies adjacent to the main filtering assembly are primary auxiliary filtering assemblies, the initial end of a second conveying channel of the primary auxiliary filtering assembly is communicated with the tail end of a first conveying channel of the main filtering assembly, the second conveying channels of any two adjacent auxiliary filtering assemblies are communicated, and a connecting pipe of the final auxiliary filtering assembly is connected with a high-pressure water source;
the water washing assembly comprises a recovery tank, at least one water pump and a plurality of water washing collection tanks, wherein the tail end of a first filtrate channel of the main filter assembly is communicated with the recovery tank, the plurality of water washing collection tanks are in one-to-one correspondence with the plurality of auxiliary filter assemblies, a water inlet of each water washing collection tank is communicated with the tail end of a second filtrate channel of the corresponding auxiliary filter assembly, a water outlet of each water washing collection tank is communicated with a connecting pipe of the auxiliary filter assembly of the previous stage, and the water pumps are respectively arranged on pipelines between the water outlet of each water washing collection tank and the connecting pipe of the auxiliary filter assembly;
The upper filter cloth and the lower filter cloth are correspondingly provided with spray rinsing water tanks;
Still include the inlet pipe, the inlet pipe setting is in main filter assembly's first conveying channel top, and the inlet pipe is in between filter cloth and the lower filter cloth, and it has the discharge gate to open on the inlet pipe.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810638326.5A CN108654177B (en) | 2018-06-20 | 2018-06-20 | Belt filter press |
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| CN201810638326.5A CN108654177B (en) | 2018-06-20 | 2018-06-20 | Belt filter press |
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| CN108654177A CN108654177A (en) | 2018-10-16 |
| CN108654177B true CN108654177B (en) | 2024-05-03 |
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