CN103405953B - Filter press - Google Patents

Abstract

The embodiment of the invention discloses a filter press including a shell, a filter ring, a squeeze capsule, a filter actuator and a squeeze actuator, the filter ring is arranged in the shell, and a filtrate channel is formed between the filter ring and the shell; the squeeze capsule There are sawtooths extending along its axial direction on the peripheral surface. The squeeze capsule is set in the casing and surrounded by the filter ring, forming a filter area between the two. The part of the squeeze capsule located in the casing can expand under the drive of the squeeze actuator or shrink; the shell is provided with the first filtrate outlet connected to the filtrate channel, the filter cake outlet connected with the filter area and the slurry inlet connected with the filter press actuator and the filter area; the filter cake outlet is provided with a partition filter area and external barriers. The filter press mentioned above can not only obtain an ideal filter cake for the slurry with high concentration and coarse particle size, but also has a high recovery rate for some slurry with low concentration, fine particle size and recovery value.

Description

a filter press

technical field

The present invention relates to a separation device, and more particularly, to a filter press.

Background technique

A filter press is a mechanical device that uses a special filter medium to allow the liquid to osmose out. The filter press can extract the solids in the mixed liquid and realize the function of solid-liquid separation. Existing filter presses mainly include box filter presses, belt filter presses, diaphragm filter presses and plate and frame filter presses.

Please refer to Fig. 1 and Fig. 2, Fig. 1 is a schematic structural diagram of a filter press provided by the prior art; Fig. 2 is a schematic structural diagram of a filter press provided by the prior art when it is working.

The filter press comprises a frame 6', two beams 4' and a hydraulic pressing device 1' arranged on the frame 6'. A push plate 2', a stop plate 5' and a plate frame group 3' are arranged between the two beams 4', wherein the push plate 2' is in contact with the hydraulic pressing device 1', and the plate frame group 3' is arranged on the push plate 2 ' and the blocking plate 5', the plate frame group 3' is composed of a plurality of plate frames. When the above-mentioned filter press is working, the piston rod of the hydraulic pressing device 1' presses the push plate 2' to the right, and the push plate 2' squeezes the plate and frame group 3', so that the plate and frame group 3' is preliminarily compressed, and the plate and frame are pressed. The filter machine is injected with high pressure. After the injection is completed, the hydraulic pressing device 1' starts to work, and presses and squeezes the material. After the extrusion is completed, a filter cake is formed between the plate and frame, and the hydraulic pressing device drives and pushes the material. The plate moves to the left, the force between the plate frame and the plate frame becomes smaller, and the filter cake breaks and falls under the action of gravity. The filter press with the above structure can obtain an ideal filter cake for the slurry with high concentration and coarse particle size, but it has limitations for some slurry with low concentration, fine particle size and recovery value.

Therefore, how to break the above limitations has become a technical problem to be solved urgently by those skilled in the art.

Contents of the invention

In view of this, the present invention provides a filter press to achieve the purpose of breaking the limitation of the existing filter press.

To achieve the above object, the present invention provides the following technical solutions:

A filter press, comprising a housing, a filter ring, a press capsule, a filter press actuator, and a press actuator, wherein the filter ring is arranged in the housing, and a filter ring is formed between the filter ring and the housing. Filtrate channel; there are serrations extending along the axial direction on the peripheral surface of the pressing capsule, the pressing capsule is arranged in the housing and surrounded by the filter ring, a filtering area is formed between the two, and the pressing capsule is located The part inside the housing can expand or contract under the drive of the pressing actuator; the housing is provided with a first filtrate outlet communicating with the filtrate channel, a filter cake outlet communicating with the filtering area and The filter press actuator is connected with the slurry inlet of the filter area; the filter cake outlet is provided with a blocking mechanism for blocking the filter area from the outside world.

Preferably, in the above-mentioned filter press, the partition mechanism includes a filling inlet and outlet pipe, a filling capsule and a filling actuator, wherein the filling inlet and outlet pipe runs through the press capsule, and the filling actuator is driven by the filling inlet and outlet pipe The filled capsule expands or contracts inside the housing.

Preferably, in the above-mentioned filter press, the filling capsule is detachably fixed at one end of the filling inlet and outlet tube inside the casing.

Preferably, in the above-mentioned filter press, the filling capsule is fixed at one end of the filling inlet and outlet tube inside the housing through a first connecting sleeve, and the first connecting sleeve is arranged at one end inside the filling capsule. There is a first clamping plate, a groove is arranged inside the first clamping plate, the groove accommodates the protrusion of the filling capsule, a second clamping plate is arranged on the outside of the filling capsule, the first clamping plate A clamping plate is fixedly connected with the second clamping plate, a second connecting sleeve is arranged on the second clamping plate, and the second connecting sleeve is fixedly connected with the pressing capsule.

Preferably, in the filter press described above, a cake breaking mechanism is provided at both ends of the press capsule.

Preferably, in the above filter press, the cake breaking mechanism includes protrusions arranged at both ends of the press capsule and steel wires connected to the protrusions at both ends of the press capsule.

Preferably, in the above filter press, the cake breaking mechanism further includes a blowing mechanism.

Preferably, in the above-mentioned filter press, the blowing mechanism includes an air storage tank and an injection pressure pipe connecting the air storage tank and the filtering area.

Preferably, in the above-mentioned filter press, the cake breaking mechanism further includes a back-blowing pressure pipe arranged in the middle of the housing and communicating with the air storage tank and the filtrate channel.

Preferably, in the filter press described above, a third connection sleeve is sheathed on the outer periphery of the filling inlet and outlet pipe, and one end of the third connection sleeve outside the housing is the second filtrate outlet, and the third connection One end of the sleeve located inside the housing communicates with the channel between the teeth of the squeeze capsule; the housing is also provided with a first connecting sleeve, and one end of the first connecting sleeve located outside the housing In order to drive the hydraulic pressure hole, one end of the first connecting sleeve located in the housing communicates with the passage between the saw teeth of the pressing capsule, and the first connecting sleeve and the passage between the saw teeth of the pressing capsule And the third connecting sleeve forms a passage.

The filter press provided by the present invention includes a housing, a filter ring, a press capsule, a filter actuator and a press actuator, wherein the filter ring is arranged in the housing, and the filter ring and the housing A filtrate channel is formed; the peripheral surface of the squeeze capsule has serrations extending along its axial direction, the squeeze capsule is arranged in the housing and surrounded by the filter ring, a filter area is formed between the two, the squeeze capsule The part located in the housing can be expanded or contracted under the drive of the pressing actuator; the housing is provided with a first filtrate outlet communicating with the filtrate passage, and a filter cake outlet communicating with the filtering area And a slurry inlet that communicates with the filter press actuator and the filter area; the filter cake outlet is provided with a blocking mechanism that blocks the filter area from the outside world.

When in use, in the preparation stage, the filter area is isolated from the outside world under the action of the partition mechanism; in the filter press stage, the filter press actuator is started, and the filter press actuator continuously sends the slurry into the filter area through the slurry inlet, and the filtration The filtrate of the final slurry enters the filtrate channel through the filter ring, and is discharged out of the equipment through the first filtrate outlet, while the particulate matter in the slurry stays in the filter area; during the squeezing stage, the squeezing actuator is started, and the squeezing actuator sends the squeeze capsule Filling with liquid, the press capsule expands, and the expanded press capsule squeezes the filter material to make the filter material a block-shaped filter cake; in the cake breaking stage, the press actuator discharges the liquid in the press capsule, the press capsule shrinks, and the filter cake It falls off from the filter ring under its own gravity, opens the partition mechanism, and discharges the filter cake from the filter cake outlet.

The filter press with the above structure can not only obtain an ideal filter cake for the slurry with high concentration and coarse particle size, but also has a high recovery rate for some slurry with low concentration, fine particle size and recovery value. Therefore, the present invention The provided equipment breaks the limitation of the existing filter press to a certain extent.

Description of drawings

Fig. 1 is the structural representation of the filter press provided by the prior art;

Fig. 2 is the structural representation when the filter press provided by the prior art works;

Fig. 3 is the schematic diagram of the main sectional structure of the first filter press provided by the embodiment of the present invention;

Fig. 4 is the main sectional structure schematic diagram of the second filter press provided by the embodiment of the present invention;

Fig. 5 is the main sectional structure schematic diagram of the third filter press provided by the embodiment of the present invention;

Fig. 6 is the schematic diagram of the main sectional structure of the fourth filter press provided by the embodiment of the present invention;

Fig. 7 and Fig. 8 are the cross-sectional view of A-A section in Fig. 6;

Fig. 9 is the enlarged structural representation of part I in Fig. 6;

Fig. 10 is a schematic diagram of the enlarged structure of part II in Fig. 6;

Fig. 11 is the enlarged structure diagram of part III in Fig. 6;

Fig. 12 is a front view structural schematic diagram of the filter press provided in Fig. 6;

Fig. 13 is a top view structural schematic diagram of the filter press provided in Fig. 12;

Fig. 14 is a rear view structural schematic view of the filter press provided in Fig. 6;

Fig. 15 is a top view structural schematic view of the filter press provided in Fig. 14;

Fig. 16 is a schematic structural view of a squeeze volume tank provided by an embodiment of the present invention;

Fig. 17 is a schematic diagram of the connection relationship between the components in the filter press provided by the embodiment of the present invention.

Among them, in Figure 1 to Figure 2:

Hydraulic pressing device 1', pushing plate 2', plate frame group 3', beam 4', blocking plate 5', frame 6'

In Figure 3 to Figure 17:

Shell 1, end cap 11, blowing port 111, blowing chamber 112, blowing inner port 113, cylinder body 12, filter cake outlet 121, first filtrate outlet 122, filtrate discharge pipe 123, slurry inlet 124, buffer chamber 125, slurry inner port 126, filtrate outlet pipe 127, first connecting sleeve 13, drive hydraulic pressure hole 131, partition 132, fixed sleeve 133, second connecting sleeve 14, squeeze port 141, third connecting sleeve 15 , second filtrate outlet 151, filter ring 2, squeeze capsule 3, filter area 4, filtrate channel 5, partition mechanism 6, filling in and out pipe 61, filling capsule 62, filling volume tank 63, first connection sleeve 631, second connection Sleeve 632, first clamping plate 634, second clamping plate 633, bolt 635, filling inlet and exhaust pipe 64, first fixing plate 641, guide column 642, slurry inlet pipe 71, pressure filter volume tank 72, pneumatic Diaphragm pump 73, filter press inlet and exhaust pipe 74, drive hydraulic empty pipe 75, press inlet and outlet pipe 81, press volume tank 82, tank body 821, capsule 822, inner clamping plate 823, outer clamping plate 824, bolts 825, Intake and exhaust pipes 826, liquid inlet and outlet ports 827, press air intake and exhaust pipes 83, protrusions 91, steel wires 92, blowing air pressure pipes 93, reverse blowing air pressure pipes 94, and air storage tanks 95.

Detailed ways

In the process of producing acetylene from natural gas, a large amount of by-product carbon black will be produced, which will exist in water, and form a carbon slurry with a very low concentration (about 2.5%) after flotation, and now use a vacuum drum filter to filter it into a cake. , sent to landfill or dried and recycled. Due to the low filtration pressure difference of vacuum filtration (about 0.06mPa), the carbon slurry has a fine particle size and low concentration, and the solid content of the filter cake is only about 17%, which brings difficulties to external transportation and drying recovery. In addition, due to the open operation, the surface of the filter cake is prone to flying, and the carbon dust pollution in the production site is serious. The carbon ink slurry produced in the natural gas to acetylene process has a fine particle size (average around 20um) and is rich in organic matter, which is extremely difficult to filter. Therefore, there is an urgent need for a new type of filter press that can realize press filtration of slurry with low concentration and fine particle size.

Hereinafter, an embodiment will be described with reference to the drawings. In addition, the examples shown below do not limit the content of the invention described in the claims in any way. In addition, all the contents of the configurations shown in the following embodiments are not limited to be essential to the solutions of the invention described in the claims.

Please refer to Figures 3 to 4, Figure 3 is a schematic diagram of the main sectional structure of the first filter press provided by the embodiment of the present invention; Figure 4 is a main section of the second filter press provided by the embodiment of the present invention Schematic view of the structure.

The filter press includes a shell 1, a filter ring 2, a squeeze capsule 3, a filter actuator and a squeeze actuator, wherein the filter ring 2 is arranged in the shell 1, and a filtrate channel is formed between the filter ring 2 and the shell 1 5. There are sawtooths extending along the axial direction on the peripheral surface of the squeeze capsule 3. The squeeze capsule 3 is set in the casing 1 and surrounded by the filter ring 2, and a filter area 4 is formed between the two. The squeeze capsule 3 is located in the casing The part inside 1 can expand or contract under the drive of the pressing actuator; the shell 1 is provided with a first filtrate outlet 122 communicating with the filtrate channel 5, a filter cake outlet 121 communicating with the filtering area 4 and communicating with the filter press actuator The slurry inlet 124 of the filter area 4 and the filter cake outlet 121 are provided with an isolation mechanism 6 that isolates the filter area 4 from the outside world.

When in use, in the preparation stage, the filter area 4 is isolated from the outside world under the action of the partition mechanism 6; in the filter press stage, the filter press actuator is started, and the filter press actuator continuously sends the slurry to the filter through the slurry inlet 124. In area 4, the filtrate of the filtered slurry enters the filtrate channel 5 through the filter ring 2, and is discharged out of the equipment through the first filtrate outlet 122, while the particulate matter in the slurry stays in the filtering area 4; in the pressing stage, the pressing is started mechanism, the squeeze actuator fills the squeeze capsule 3 with liquid, the squeeze capsule 3 expands, and the expanded squeeze capsule 3 squeezes the filter material so that the filter material becomes a block-shaped filter cake; in the cake breaking stage, the squeeze actuator will squeeze the capsule The liquid in 3 is discharged, the squeeze capsule 3 shrinks, the filter cake falls off from the filter ring 2 under its own gravity, the partition mechanism 6 is opened, and the filter cake is discharged from the filter cake outlet 121. The filter press with the above structure can not only obtain an ideal filter cake for the slurry with high concentration and coarse particle size, but also has a high recovery rate for some slurry with low concentration, fine particle size and recovery value. Therefore, the present invention The provided equipment breaks the limitation of the existing filter press to a certain extent.

In addition, the filter press provided by this solution does not need to rotate equipment, and operates under airtight conditions. Because there are no rotating parts, it is easy to maintain an airtight state, which facilitates operations from filter pressing to cake discharge to be completed in an airtight state. Compared with Feiyang without filter cake, the working environment of the vacuum drum filter is improved.

In order to further optimize the above-mentioned technical solution, please refer to Fig. 5, which is a schematic diagram of the main sectional structure of the third filter press provided by the embodiment of the present invention; Fig. 6 is the fourth filter press provided by the embodiment of the present invention Schematic diagram of the main sectional structure of the machine.

The filter press is also provided with a cake breaking mechanism at both ends of the pressing capsule 3 . The so-called cake breaking mechanism is a mechanism that can further break the filter cake after the pressing stage is completed.

In this solution, the cake breaking mechanism includes protrusions 91 arranged at both ends of the pressing capsule 3 and steel wires 92 connected to the protrusions 91 located at both ends of the pressing capsule 3 . During the pressing stage, the protrusions 91 located at both ends of the pressing capsule 3 follow the pressing capsule 3 and approach the filter ring 2 at the same time. During the process, the steel wire 92 on the protrusion 91 can cut through the filter cake, thereby achieving the purpose of secondary crushing of the filter cake. Wherein, the shape of the protrusion 91 is arbitrary, and the present invention preferably has a tooth-like structure.

In order to further clean the filter material on the filter ring 2 during blanking, the cake breaking mechanism also includes a blowing mechanism to blow off the filter material on the filter ring 2 by blowing. The blowing mechanism blows gas into the filter area 4 or the filtrate channel 5 through the interface provided on the housing 1, and under the action of the gas, the filter material on the filter ring 2 will be further blown down. Wherein, the blowing mechanism is a device capable of providing continuous delivery of gas. In this technical solution, the blowing mechanism includes an air storage tank 95 and a blowing pressure pipe 93 connecting the air storage tank 95 and the filter area 4 . The blowing pressure pipe 93 can be arranged on the upper end of the casing 1 to blow the filter material from top to bottom.

In addition, the cake breaking mechanism also includes a back blowing pressure tube 94 arranged in the middle of the housing 1 and connected to the air storage tank 95 and the filtrate channel 5, so that the cleaning effect of back blowing the filter material is better.

The blocking mechanism 6 in the embodiment of the present invention can be a valve element, which realizes the communication or blocking between the filtering area 4 and the outside world through rotation, or any other structure that can realize the blocking function. In another technical solution of the present invention, improvements are mainly made from the partition mechanism 6 .

Please refer to Fig. 6 to Fig. 11, Fig. 6 is a schematic diagram of the main cross-sectional structure of the fourth filter press provided by the embodiment of the present invention; Fig. 7 and Fig. 8 are cross-sectional views of the A-A section in Fig. 6; Fig. 9 is a diagram Figure 10 is a schematic diagram of the enlarged structure of part I in Figure 6; Figure 11 is a schematic diagram of the enlarged structure of part III in Figure 6.

The partition mechanism 6 includes a filling inlet and outlet pipe 61, a filling capsule 62 and a filling actuator, wherein the filling inlet and outlet pipe 61 runs through the squeeze capsule 3, and the filling actuator drives the filling capsule 62 to expand or contract inside the housing 1 through the filling inlet and outlet pipe 61 .

When in use, the filling actuator fills the filling capsule 62 with medium through the filling inlet and outlet pipe 61, and the filling capsule 62 expands under the action of the liquid, thereby isolating the filter area 4 from the outside world. When not working, the filling actuator will discharge the medium filling the capsule 62 through the filling inlet and outlet pipe 61 .

In the technical solution of the present invention, the filling actuator may be a hydraulic pump, an air pump, or other equipment capable of continuously transporting media.

The filling capsule 62 itself is flexible and can expand under the action of the internal medium.

In order to facilitate maintenance of the device, the filling capsule 62 is detachably fixed at one end of the filling inlet and outlet tube 61 inside the casing 1 . There are many forms of detachable connection, and one of them is specifically introduced in this solution. As shown in FIG. One end of the first connecting sleeve 631 located inside the filling capsule 62 is provided with a first clamping plate 634, and a groove is arranged in the first clamping plate 634, the groove accommodates the protrusion of the filling capsule 62, and the outside of the filling capsule 62 is provided with The second clamping plate 633 , the first clamping plate 634 are fixedly connected with the second clamping plate 633 , the second clamping plate 633 is provided with a second connecting sleeve 632 , and the second connecting sleeve 632 is fixedly connected with the squeeze capsule 3 . Preferably, the fixed connection is realized by bolts 635 .

In order to ensure that the filling capsule 62 is coaxial with the housing 1 when it expands, as shown in Figure 11, a first fixing plate 641 is provided at the bottom of the filling capsule 62, and a guide column 642 is fixed on the first fixing plate 641, and the guide column 642 Cooperate with the guide hole on the housing 1. When the filling capsule 62 expands, under the action of the guide post 642, the filling capsule 62 can be coaxial with the housing 1, so that the filling capsule 62 and the housing 1 are closely matched, and the filtering area 4 can be well isolated.

For the specific structure of the squeeze capsule 3 in the embodiment of the present invention, please refer to Fig. 7 to Fig. 9, the peripheral surface of the squeeze capsule 3 is provided with sawtooth extending along the axial direction of the squeeze capsule 3, and a filtrate is formed between the sawtooth The channels that flow through play the role of filtering to a certain extent. The squeeze capsule 3 is sleeved on the second connecting sleeve 14 and fixed by the fixing sleeve 133, while the second connecting sleeve 14 is fixed on the housing 1, and the second connecting sleeve 14 is connected to the second connecting sleeve 14 through a partition 132. The two connecting sleeves 14 are fixed on the first connecting sleeve 13 .

In order to improve the filtering effect of the squeezed capsule 3, a third connection sleeve 15 is provided on the periphery of the filling inlet and outlet pipe 61, and the end of the third connection sleeve 15 located outside the housing 1 is the second filtrate outlet 151, and the third connection sleeve 15 One end inside the housing 1 communicates with the channel between the saw teeth of the pressing capsule 3; the housing 1 is also provided with a first connecting sleeve 13, and the end of the first connecting sleeve 13 located outside the housing 1 is a drive hydraulic hole 131, one end of the first connecting sleeve 13 located in the housing 1 communicates with the channel between the sawtooth of the squeeze capsule 3, the first connecting sleeve 13, the channel between the sawtooth of the squeeze capsule 3 and the third connecting sleeve 15 form a path. Slurry enters the passage between the saw teeth of the squeeze capsule 3 through the hydraulic empty pipe 75 and is filtered, and the filtered filtrate passes through the passage between the third connecting sleeve 15 and the filling inlet and outlet pipe 61 and is discharged through the second filtrate outlet 151 to outside the housing 1.

In this technical solution, a further improvement has been made on the structure of the housing 1. The housing 1 includes a cylinder body 12 and an end cover 11 tightly fixed on the end surface of the cylinder body 12, wherein one end of the filter ring 2 is fixed on the cylinder body 12 On the inner wall, the squeeze capsule 3 is fixed on the end cover 11 through the second connecting sleeve 14, the second connecting sleeve 14 communicates with the pressing actuator, and the slurry inlet 124 is arranged on the end cover 11 or the cylinder 12. The plug-in structure design of the squeeze capsule 3 is easy to disassemble. The vertical structure design of the press capsule 3 can perform press filtration of the slurry at a higher pressure.

In order to simplify the structure of the housing 1, specifically, the first connecting sleeve 13 is first fixed on the end cover 11, wherein the first connecting sleeve 13 is penetrated by the second connecting sleeve 14, and the second connecting sleeve 14 is penetrated by a The third connecting sleeve 15 , the filling in and out pipe 61 runs through the third connecting sleeve 15 . The first connection sleeve 13 is provided with a drive hydraulic pressure hole 131, the second connection sleeve 14 is provided with a squeeze port 141, the third connection sleeve 15 is provided with a second filtrate outlet 151, and the slurry inlet 124 is provided in the cylinder. 12 , the blowing port 111 is set on the end cover 11 , and the blowback pressure tube 94 is set in the middle of the barrel 12 . The above-mentioned ports are connected with the corresponding pipelines, that is, the squeeze inlet and outlet pipe 81 is connected with the squeeze port 141, the blowing pressure pipe 93 is connected with the blowing port 111, the slurry inlet pipe 71 is connected with the slurry inlet 124, and the hydraulic pressure hole 131 is connected. It is connected with the hydraulic empty pipe 75 , the first filtrate outlet 122 is connected with the filtrate discharge pipe 123 , and the second filtrate outlet 151 is connected with the filtrate outlet pipe 127 .

In order to prevent the slurry from entering the blowing pressure pipe 93 during the filter press stage, a blowing chamber 112 is arranged in the end cover 11, and a blowing port 111 is set on the part of the blowing chamber 112 in contact with the outside, which communicates with the filter area 4 The part is provided with a blowing inner port 113 . The setting of the blowing chamber 112 can form a section of buffer zone between the filter area 4 and the blowing pressure pipe 93. When performing press filtration, the blowing chamber 112 enters the high-pressure gas to form an air curtain under the action of the blowing actuator. Therefore, it is possible to block the slurry from being pressed into the blowing pressure pipe 93 .

In order to prevent the slurry from entering the filter area 4 too quickly, a buffer chamber 125 is also provided on the cylinder body 12. The buffer chamber 125 is located on the peripheral surface of the cylinder body 12. The buffer chamber 125 communicates with the filter area 4 through the slurry inner port 126. . The filter press actuator first sends the slurry into the buffer chamber 125 , and then enters the filter area 4 from the buffer chamber 125 through the slurry inner port 126 .

Since the filter press provided by this program integrates the three main solid-liquid separation methods of filtration, pressing and pneumatic liquid displacement, the solid content of the filter cake is greatly increased; the cake breaking, injection and reverse The filter cake blowing method makes the cake removal of the filter press easy and feasible; the structure is simple and compact, light in weight, and occupies a small area. Although the volume is not large, the cycle time is short, and it also has high processing capacity and wide application. scope.

The following is a detailed introduction to each actuator, please refer to Figure 12 to Figure 17, where, please refer to Figure 12 to Figure 17, Figure 12 is a front view structural diagram of the filter press provided in Figure 6; Figure 13 is Fig. 12 is a schematic view of the top view of the filter press provided; Fig. 14 is a schematic view of the rear view of the filter press provided in Fig. 6; Fig. 15 is a schematic view of the top view of the filter press provided in Fig. 14; Fig. 16 is this Schematic diagram of the structure of the press capacity tank provided by the embodiment of the invention; FIG. 17 is a schematic diagram of the connection relationship between the components in the filter press provided by the embodiment of the invention.

The filter press actuator can be a hydraulic pump, a pneumatic pump and other equipment capable of continuously conveying media. The pressing actuator can be a hydraulic pump, a pneumatic pump and other equipment capable of continuously conveying media. Specifically, the pressure filtration actuator includes a pneumatic diaphragm pump 73 and a pressure filtration volume tank 72 communicating with the pneumatic diaphragm pump 73 and the filtration area 4 . The squeeze actuator includes a squeeze volume tank 82 which communicates with the squeeze capsule 3 .

The volume tanks mentioned above are respectively communicated with the gas storage tank 95, and the gas storage tank 95 provides the gas source for each volume tank. Wherein, the filter press volume tank 72 is communicated with the air storage tank 95 through the filter press intake and exhaust pipe 74, the squeeze volume tank 82 is communicated with the air storage tank 95 through the press intake and exhaust pipe 83, and the filling volume tank 63 is connected with the air storage tank 95 through the filling intake and exhaust pipe. 64 communicates with the gas storage tank 95.

The structure of the filter volume tank 72, the filling volume tank 63 and the squeezing volume tank 82 are the same, but the names are different. The embodiment of the present invention only takes the squeezing volume tank 82 as an example. Please refer to FIG. 17. The squeezing volume tank 82 includes a tank body 821 and capsule 822, the opening of the capsule 822 is provided with an inner clamping plate 823, the inner clamping plate 823 is provided with a groove for accommodating the protrusion at the opening of the capsule 822, the end surface of the tank body 821 is provided with an outer clamping plate 824, and the bolt 825 passes through the outer clamping plate 824 and the inner clamping plate 823, and the capsule 822 is fixed on the tank body 821. The inner clamping plate 823 and the outer clamping plate 824 are provided with an intake and exhaust pipe 826 communicating with the inside of the capsule 822. The tank body 821 is provided with a liquid inlet and discharge port 827 communicating with the inside of the tank body 821 . The expansion control of the capsule is carried out in the form of a volume tank, which effectively avoids damage to the capsule due to excessive expansion. The liquid filling of the working capsule can increase its pressing pressure and bearing pressure, and the life of the capsule is prolonged. The unique structure and installation method ensure its reliability. It can operate only with air source, and it is light in weight, small in size, and mobile in the field, expanding its scope of use and field.

Please combine with Figure 6 and Figure 17 to introduce the specific working process of the above filter press:

Preparation stage: ① Fill the filling volume tank 63 and the squeezing volume tank 82 with liquid; ② Inflate the pressure filter volume tank 72; 4 Cut off from the outside world.

Feed filter press: ① Start the pneumatic diaphragm pump 73 to feed material to the filter area 4 through the slurry inlet pipe 71 for press filter. ②The air injection solenoid valve of the injection chamber 112 is opened, and an appropriate amount of compressed air is injected into the injection chamber 112 to prevent the slurry from entering the injection chamber 112. ③The capsule in the pressure filter volume tank 72 is exhausted, and the pumped slurry is sucked into the tank. After the pump is stopped, the slurry in the tank is fully pressed into the filter area 4, and the filter press process is continued.

Squeeze: Squeeze the capsule 3 to expand and press, inflate the capsule in the squeeze volume tank 82, so that the liquid in the tank is injected into the squeeze capsule 3 to make it expand, and the filter material in the filter area 4 is squeezed and deliquored; The channel is injected with compressed air, and the filter cake is forced to drive liquid, and at the same time, the filter medium is regenerated by backflushing.

Cake breaking process: the capsule in the squeeze volume tank 82 is exhausted, so that the liquid in the squeeze capsule 3 is sucked back into the squeeze volume tank 82 to shrink it. The steel wire 92 on the pressing capsule 3 will cut the filter cake during shrinkage. In the late stage of contraction of the squeeze capsule 3, the filtrate channel 5 is fed with compressed air through the back blowing air tube 94, and the filter medium is back blown and decaketed.

The capsule in the filling volume tank 63 is exhausted, and the liquid in the filling capsule 62 is sucked back into the filling volume tank 63 to make it shrink and leave the filter material passage. Open the electromagnetic valve of the blowing chamber 112 and the air storage tank 95 to blow the filter material of the cake, and blow the filter cake into the lower material barrel (bag).

Fill the capsule in the volume tank 63 to inflate again to carry out the next cycle operation.

Through the description of the above working process, it can be known that the pressure filtration of the slurry can be realized only by controlling the opening and closing of each pipeline in the whole working process. Opening or closing can complete the entire cycle process, so it is easy to realize automatic control, which can meet the needs of automatic control of the entire process production process.

It can be seen from tests that the filter press provided by the present invention has a large filtration pressure difference, the filtration capacity per unit area is 5-6 times that of a vacuum drum filter, and the energy consumption per unit product is reduced by 30%; Continuous operation can be realized; due to the airtight filtration and the increase of the solid content of the filter cake and the compaction of the filter cake, there is very little flying in the blown decake dye, which can greatly reduce the carbon ink dust pollution on the job site; The solid content of the cake can be increased from 17% to 27% in vacuum filtration, which can greatly reduce the amount of filter cake transported out and double the heat energy consumption in the drying and recycling process.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. a filter press, is characterized in that, comprise housing, filter ring, squeezing capsule, press filtration executing agency and squeezing executing agency, wherein, described filter ring is arranged in described housing, forms filtrate channel between described filter ring and described housing; Described squeezing capsule side face has the sawtooth extended along its axial direction, the passage of filtrate flow warp is formed between described sawtooth and described sawtooth, described squeezing capsule to be arranged in described housing and to be surrounded by described filter ring, therebetween form filtration zone, the part that this squeezing capsule is positioned at described housing can expand or shrink under the driving of described squeezing executing agency; Described housing is provided with the first filtrate (liquid be communicated with described filtrate channel, the filtered solid outlet be communicated with described filtration zone and be communicated with the slurry import of described press filtration executing agency and described filtration zone; Described filtered solid outlet place is provided with and cuts off described filtration zone and extraneous separating mechanism.

2. filter press as claimed in claim 1, it is characterized in that, described separating mechanism comprises filling inlet/outlet pipe, capsule charge and filling executing agency, wherein, described filling inlet/outlet pipe runs through described squeezing capsule, and described filling executing agency drives described capsule charge in the internal expansion of described housing or contraction by described filling inlet/outlet pipe.

3. filter press as claimed in claim 2, it is characterized in that, described capsule charge is dismountable is fixed on one end that described filling inlet/outlet pipe is positioned at described enclosure interior.

4. filter press as claimed in claim 3, it is characterized in that, described capsule charge is fixed on by the first adapter sleeve one end that described filling inlet/outlet pipe is positioned at described enclosure interior, and one end that described first adapter sleeve is positioned at described capsule charge inside is provided with the first clamping plate, groove is provided with in described first clamping plate, described groove holds the jut of described capsule charge, the outer setting of described capsule charge has the second clamping plate, described first clamping plate is fixedly connected with described second clamping plate, described second clamping plate is provided with the second adapter sleeve, described second adapter sleeve is fixedly connected with described squeezing capsule.

5. filter press as claimed in claim 4, it is characterized in that, the two ends of described squeezing capsule are also provided with Po Bing mechanism.

6. filter press as claimed in claim 5, is characterized in that, described Po Bing mechanism comprises the steel wire that the projection that is arranged on described squeezing capsule two ends and connection are positioned at the projection at described squeezing capsule two ends.

7. filter press as claimed in claim 6, it is characterized in that, described Po Bing mechanism also comprises spraying and blowing organ.

8. filter press as claimed in claim 7, it is characterized in that, described spraying and blowing organ comprises air accumulator and presses blank pipe with the winding-up being communicated with described air accumulator and described filtration zone.

9. filter press as claimed in claim 8, is characterized in that, described Po Bing mechanism also comprises and is arranged on described housing central section and blank pipe is pressed in the blowback being communicated with described air accumulator and described filtrate channel.

10. filter press as claimed in claim 2, it is characterized in that, described filling inlet/outlet pipe periphery is also arranged with the 3rd joint sleeve, described 3rd joint sleeve one end be positioned at outside described housing is the second filtrate (liquid, the channel connection between one end in described housing of described 3rd joint sleeve and the sawtooth of described squeezing capsule; Described housing is also provided with the first joint sleeve, eat dishes without rice or wine for driving hydraulic pressure in one end that described first joint sleeve is positioned at outside described housing, channel connection between one end in described housing of described first joint sleeve and the sawtooth of described squeezing capsule, the passage between the sawtooth of described first joint sleeve, described squeezing capsule and described 3rd joint sleeve form a path.