CN111921239A

CN111921239A - Mud distribution and filter pressing device

Info

Publication number: CN111921239A
Application number: CN202010890851.3A
Authority: CN
Inventors: 不公告发明人
Original assignee: Nie Qizhao
Current assignee: Nie Qizhao
Priority date: 2020-08-29
Filing date: 2020-08-29
Publication date: 2020-11-13

Abstract

The invention discloses a sludge distribution and filter pressing device which comprises a sludge distribution machine and a filter press which are matched to work; the mud distributing machine comprises a mud distributing main pipe, a plurality of mud distributing branch pipes and a movable supporting mechanism; the filter press is arranged beside a cloth outlet of the mud distribution machine and comprises a filter press component, a lifting mechanism and a press machine. The filter-pressing sludge distributing device has the advantages of high solid-liquid separation sludge discharging speed, high dehydration rate, low requirement on filter cloth and small occupied area.

Description

Mud distribution and filter pressing device

Technical Field

The invention belongs to the technical field of solid-liquid separation, and particularly relates to a sludge distribution and filter pressing device.

Background

The process of separating solid from liquid is solid-liquid separation, and the method is very much, sedimentation, filtration, membrane filtration, filter pressing, vacuum, centrifuge and the like. The common solid-liquid separation equipment in the prior art comprises a screw stacking machine, a cloth belt type filter press, a spiral solid-liquid separator and a plate-and-frame filter press.

Fold spiral sludge dewaterer shortcoming: 1. the maximum treatment capacity of the designed machine type is about 800kg/h of absolute sludge dry weight, and more than 30 million-ton-scale enterprises of a large-scale sewage treatment plant may need; 2. the screw stacking machine cannot treat sludge containing hard particles such as sand, stones and the like, or abrade the movable and static rings and the screw shaft; 3. the sludge to be treated must be added with a flocculating agent and can be treated only by forming good flocs, otherwise, the sludge running phenomenon of a moving loop and a static loop is easy to occur; 4. the equipment realizes continuous work, and the water content of the sludge discharged from the sludge is generally about 80 percent.

The cloth belt type filter press belongs to a continuous working device and has larger treatment capacity; generally used in large-scale sewage treatment plants, water works and the like. The disadvantages are as follows: the water content of the sludge is high, the energy consumption is large, and the maintenance is difficult.

Screw extrusion formula solid-liquid separation machine structure: after the solid-liquid mixture enters the separator, the material is extruded by conveying pressure under the rotating action of the spiral rod, the liquid component is pressed into the screen, and the solid part is collected at the lower part of the separator. It is suitable for solid content of liquid dung of 5-10% and water content of extruded solid of 65-70%.

The plate-and-frame filter press has the advantages that: belongs to an indirect working device, and has smaller handling capacity than a belt machine; the method is generally used for occasions with low solid water content, such as factory sludge dehydration, chemical intermediate solid-liquid separation and the like. The disadvantages are small treatment capacity and troublesome filter cloth replacement.

The process principles of different filter pressing devices in structural forms are different, but no device can operate fully automatically and can ensure that the dehydration rate is below 38% from the viewpoint of dehydration effect and automation degree. Meanwhile, the conventional filter pressing system has relatively low automation degree, high labor cost, large occupied area, low mud cake discharging speed and high requirement on filter cloth.

Disclosure of Invention

The invention aims to provide a sludge distributing and filter pressing device, which has the advantages of high sludge separating speed, high dehydration rate, low requirement on filter cloth and small occupied area.

The invention adopts the following technical scheme: the mud distributing and filter pressing device comprises a mud distributing machine and a filter press which are matched to work;

wherein, cloth mud machine includes:

the mud distribution main pipe is used for conveying materials to be treated;

a plurality of cloth mud branch pipe from top to bottom sets up side by side in proper order, every cloth mud branch pipe: the inlet ends of the mud distributing nozzles are communicated with a mud distributing main pipe, and the outlet ends of the mud distributing nozzles are provided with mud distributing nozzles for distributing the mud;

the movable support mechanism is used for providing a platform for the mud distribution main pipe and the mud distribution branch pipes to reciprocate in the horizontal direction;

the pressure filter sets up in the cloth export of cloth mud machine other including:

the filter pressing assembly comprises a plurality of filter pressing plates which are horizontally arranged from top to bottom in sequence, and the upper surface of each filter pressing plate 15 is used for distributing materials;

the lifting end of the lifting mechanism is connected to the filter pressing assembly, and the lifting action of the lifting mechanism is used for respectively realizing two functions: driving each filter pressing plate to rise, and enabling a gap to be formed between every two adjacent filter pressing plates; driving each filter pressing plate to descend and enabling each filter pressing plate to be in close contact;

the press machine is vertically arranged at the top of the filter pressing assembly and is used for pressing the filter pressing assembly downwards to filter press the materials;

the mud distributing branch pipe is used for horizontally moving forwards to place a plurality of mud distributing nozzles on the mud distributing branch pipe in gaps for distributing when gaps are formed between adjacent filter pressing plates; and the cloth feeding mechanism is also used for horizontally retreating to withdraw the gap after the cloth is finished and then starting the press machine.

Further, the movement support mechanism includes:

the support frame is arranged on the mud distribution main pipe or any one of the mud distribution branch pipes, and a sliding block is arranged on the support frame;

the support is provided with a track matched with the sliding block and used for realizing the horizontal reciprocating movement of the support;

and the end part of a telescopic rod of the mud distributing oil cylinder is connected to the support frame and is used for realizing the movement of the sliding block on the track through the telescopic action of the telescopic rod, so that the horizontal reciprocating movement of the mud distributing branch pipe is realized.

Furthermore, a sludge limiting plate for limiting the thickness of sludge distribution and a filter cloth cleaning nozzle for cleaning the sludge distribution nozzle are arranged beside the outlet of the sludge distribution nozzle of each sludge distribution branch pipe.

Further, the elevating mechanism includes:

the hanging plates are connected and arranged between the adjacent filter pressing plates and used for keeping the distance between the filter pressing plates within a certain distance range in a separated state;

the telescopic rod of the jacking oil cylinder is connected to the topmost filter pressing plate, and the bottom of the cylinder body of the jacking oil cylinder is fixedly arranged on the bottom plate; the telescopic rod is used for realizing distance adjustment between the filter pressing plates through telescopic action of the telescopic rod.

Further, the press comprises:

a press upper platform;

the main press oil cylinder is fixedly connected to the upper platform of the press;

the pressing platform of the press is connected to the end part of the telescopic rod of the oil cylinder of the main press;

and the four filter pressing plate guide columns are vertically arranged between the upper platform and the bottom plate of the press and are positioned around the oil cylinder of the main press.

Further, the filter-pressing plate includes:

the water permeable plate is of a flat plate structure provided with a plurality of water permeable holes;

the bottom sealing plate is arranged below the water permeable plate at intervals, a closed water containing space is formed between the bottom sealing plate and the water permeable plate, and a water outlet is formed in the side part of the bottom sealing plate;

the filter cloth is horizontally and annularly arranged on the water permeable plate and the bottom sealing plate, and the upper surface of the filter cloth is used for placing materials to be distributed and also used for performing rotary motion around the water permeable plate and the bottom sealing plate and then outputting the materials to be distributed after filter pressing outwards;

and the rubber sealing strip is arranged at the bottom of the bottom sealing plate.

Further, be equipped with the recess around the outside a week of end shrouding, vertically in the recess be provided with a plurality of pressure spring, every pressure spring's one end fixed mounting is in end shrouding department, and the other end is connected with the board that resets.

Further, the filter-pressing plate still includes:

and the two mud scraping plates are connected and arranged on the side wall of the bottom sealing plate and are respectively positioned on the feeding side and the discharging side of the pressure filter plate.

Further, the filter-pressing plate still includes:

and each guide sleeve is of an annular structure, is arranged on two sides of the bottom sealing plate and is used for being sleeved on each filter pressing plate guide pillar correspondingly.

The second technical scheme adopted by the invention is that the working method of the mud distribution filter pressing device is implemented according to the following steps:

s1, lifting the jacking oil cylinder to separate the filter pressing plates;

s2, extending the mud distributing oil cylinder, pushing the mud distributing nozzle to enter between each layer of filter pressing plate for distributing mud; after the mud distribution is finished, the mud distribution oil cylinder contracts to drive the mud distribution nozzle to withdraw;

and S3, descending the jacking oil cylinder to drive the filter pressing plates to be tightly attached, and pressing the filter pressing plates by the press machine to press and press the distributed materials.

The invention has the beneficial effects that:

1. the invention provides another sludge distribution and filter pressing device with a brand new structure, wherein a roller is arranged on each laminated filter plate to rotate, so that filter cloth is driven to rotate and is used for discharging sludge, and each layer can discharge sludge simultaneously, so that the integral sludge discharging efficiency is high;

2. the press machine is a four-column press machine, materials among filter cloth are forcedly dewatered, and the maximum tonnage of the press machine can reach 320t, so that the maximum dewatering rate can reach about 38%.

3. The filter cloth in the invention is a closed ring structure arranged around each filter pressing plate, and the length of a single filter pressing plate is usually 1-2 m, so the requirements on the bearing capacity and the softness of the filter cloth are reduced, and the requirement on the water permeability is only required to be met.

4. The filter cloth of the filter press is longitudinally overlapped, so that mud distribution and filter pressing can be completed at the same station, and the occupied area is reduced compared with a multi-station press.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a top view of FIG. 1;

FIG. 4 is a schematic structural view of the sludge distribution and filter pressing device in a sludge distribution state;

FIG. 5 is a schematic structural view of the sludge distribution and filter pressing device in a filter pressing state;

FIG. 6 is a front view of the filter press plate of the slurry distribution filter press apparatus of the present invention;

FIG. 7 is a top view of FIG. 6;

fig. 8 is a longitudinal sectional view of fig. 6.

The automatic sludge drying machine comprises a press machine 1, a press machine 11, a press machine upper platform, a main press machine oil cylinder 12, a press machine press table 13, a press filter plate guide post 14, a press filter plate 15, a press filter plate 16, a filter cloth cleaning nozzle 17, a bottom plate 18, a jacking oil cylinder 19, a sliding block 20, a sludge distribution oil cylinder 21, a support 22, a sludge distribution nozzle 23, a hanging plate 24, a sludge limiting plate 25, a track 31, a bottom sealing plate 31, a rubber sealing strip 32, a pressing spring 33, a water permeable plate 4, a reset plate 35, a sludge scraping plate 36, a water outlet 37, a guide sleeve 38, a groove 39 and a water drainage groove 40, wherein the press machine press table is provided with a press table, and the support 21 is provided; 41. a mud distributing main pipe 42, a mud distributing branch pipe 43 and a support frame.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Firstly, the invention provides a mud distribution filter pressing device, which comprises a mud distribution machine and a filter press arranged beside a mud distribution nozzle 22 of the mud distribution machine, and comprises a filter pressing assembly, a lifting mechanism and a press machine 1. The filter press and the mud distribution machine are two devices which work in a matching way, when each filter pressing plate 15 of the filter press is opened, the mud distribution nozzle 22 horizontally advances to the position between each filter pressing plate 15, and mud distribution is started; when the filter press is about to start filter pressing action, the mud distributing nozzle 22 horizontally retreats to stop mud distribution, and the filter pressing plates 15 are combined to filter the materials distributed among the filter pressing plates 15. The material to be treated can be sludge of sewage treatment plants, sludge of grain processing plants, sludge of breweries, sludge of dairy factories and separated kitchen garbage.

1. As shown in fig. 1 to 3, the mud distribution machine includes a mud distribution manifold 41, a plurality of mud distribution branch pipes 42, and a movable support mechanism. The specific structure is described as follows:

1.1, a sludge distribution main pipe 41 can be generally vertically arranged and used as an inlet for conveying materials to be treated; is communicated with the outlet of the conditioning tank 3; a plurality of cloth mud branch pipes 42 from top to bottom set up side by side in proper order, every cloth mud branch pipe 42 includes exit end and entry end, and its exit end all is equipped with the cloth mud mouth 22 that is used for the cloth, its entry end all with cloth mud house steward 41 intercommunication. Wherein, a mud limiting plate 44 for limiting the thickness of the mud and a filter cloth cleaning nozzle 16 for cleaning the mud distributing nozzle 22 are arranged beside the outlet of each mud distributing nozzle 22.

1.2, a movable support mechanism for providing a platform for reciprocating movement of the mud distribution main pipe 41 and the plurality of mud distribution branch pipes 42 in the horizontal direction. The device specifically comprises a support frame 43, a support 45 and a mud distributing oil cylinder 20. The supporting frame 43 is connected with the mud distribution header pipe 41 or any mud distribution branch pipe 42, and is used for combining the mud distribution header pipe 41 and a plurality of mud distribution branch pipes 42 into an integral structure, and the supporting frame 43 is provided with a sliding block 19. The bracket 45 is a fixed supporting structure, and is provided with a track 25 matched with the slide block 19, the slide block 19 can horizontally reciprocate along the track 25, the movement of the slide block 19 can be transmitted to the mud distribution main pipe 41 and the plurality of mud distribution branch pipes 42 through the supporting frame 43, and then the horizontal reciprocating movement of the mud distribution nozzle 22 is finally realized. The end part of a telescopic rod of the mud distributing oil cylinder 20 is connected to the support frame 43 and is used for realizing the movement of the slide block 19 on the track 25 through the telescopic action of the telescopic rod, so that the horizontal reciprocating movement of the mud distributing branch pipe 42 is realized. Provides a foundation for realizing intermittent mud distribution subsequently.

1.3, a support frame 43 and a support 45 are formed by welding profile steels, the sludge distribution main pipe 41 and each sludge distribution branch pipe 42 are supported by the support frame 43, a track 25 is arranged on the support 45, and the position of the track 25 is fixed. The mud distributing oil cylinder 20 extends forwards, the mud distributing main pipe 41 drives each mud distributing branch pipe 42 and the sliding block 19 to slide forwards on the track 25, the mud distributing nozzle 22 enters the interlayer of the adjacent filter pressing plate 15, the electric valves of the mud distributing oil cylinder 20 and the uppermost three mud distributing branch pipes 42 are opened, the material to be treated is sprayed on the filter cloth of the filter pressing plate 15 in the upper three layers in a solid-liquid mixture mode, the driving motor of the filter cloth of the filter pressing plate 15 rotates leftwards, the filter cloth drives the solid-liquid mixture to move forwards, and then the solid-liquid mixture is uniformly distributed on the interlayer filter cloth of the filter pressing plate 15 through the mud limiting plate 14 in front of the mud distributing nozzle 22. And then, by analogy, the mud is distributed at intervals from top to bottom every three layers until the cloth is finished after the solid-liquid mixture is uniformly distributed on the filter cloth of all the filter pressing plates, the rod of the mud distribution oil cylinder 20 retracts, the whole mud distribution bracket 43 retracts, the mud distribution nozzles 22 also withdraw from the layers of the filter pressing plates 15, and the operation is stopped until the mud distribution oil cylinder 20 retracts and the stroke is finished.

The number of the sludge distribution branch pipes 42 is determined according to the number of the filter press plates 15, the number of the filter press plates 15 is reduced by one to obtain the number of the sludge distribution branch pipes 42, and the working principle of each sludge distribution branch pipe 42 is the same.

2. The filter press comprises a filter pressing assembly, a lifting mechanism and a press machine 1, and the specific structural description is as follows:

2.1, the filter pressing subassembly, including a plurality of filter pressing boards 15 that set up one by one from top to bottom, the upper surface of each filter pressing board 15 is used for the cloth.

As shown in fig. 6 to 8, the filter-pressing plate 15 includes: a water permeable plate 34 having a flat plate structure provided with a plurality of water permeable holes; the bottom sealing plate 31 is arranged below the water permeable plate 34 at intervals, a closed water containing space is formed between the bottom sealing plate and the water permeable plate 34, and a water outlet 37 is formed in the side part of the bottom sealing plate; the filter cloth is horizontally and annularly arranged on the water permeable plate 34 and the bottom sealing plate 31, and the upper surface of the filter cloth is used for placing materials to be distributed and is also used for performing rotary motion around the water permeable plate 34 and the bottom sealing plate 31 and outputting the materials to be distributed after filter pressing outwards; i.e. the filter cloth is used for distributing and discharging mud. Usually, two rollers can be arranged at two ends inside each layer of filter cloth, one roller is an unpowered roller, the other roller is an electric roller, the filter cloth is directly driven to rotate by driving the electric roller, and the mud discharging speed is high. And the rubber sealing strip 32 is arranged at the bottom of the bottom sealing plate 31.

Wherein, be equipped with the recess around bottom seal board 31's outside a week, vertically in the recess be provided with a plurality of pressure spring 33, the one end fixed mounting of every pressure spring 33 bottom seal board 31 department, the other end is connected with reset plate 35. When the respective filter press plates 15 are pressed and tightly engaged, the return plate 35 of the lower filter press plate 15 exerts an upward pressure on the upper filter press plate 15 under the urging force of the pressing spring 33, thereby increasing the contact pressure between the adjacent filter press plates 15.

A large amount of liquid is generated around the filter press plate 15 during the filter pressing process, and the liquid enters the water receiving space through the water permeable plate 34 and is discharged from the water outlet 37.

The filter press plates 15 may also include one or two wiper plates 36, the wiper plates 36 being typically attached to the side walls of the bottom closure plate 31 on the inlet and outlet sides of the filter press plates 15, respectively. The scraper 36 is used for scraping mud to separate the mud cake from the filter cloth.

The filter pressing assembly is a core component of the full-automatic intelligent filter press, and at least two or more filter pressing plates 15 can work simultaneously to perform filter pressing operation. After the materials are distributed on the upper surface of each filter pressing plate 15, the main press cylinder 12 moves downwards, and each upper filter pressing plate 15 is pressed downwards, in two adjacent filter pressing plates 15, the rubber sealing strip 32 at the bottom of the upper filter pressing plate 15, the filter cloth, the materials to be processed in a solid-liquid mixing state and the filter cloth of the lower filter pressing plate 15 are pressed downwards together, the rubber sealing strip 32 of the upper filter pressing plate 15 drives the double-layer filter cloth to be in contact with the reset plate 35 in the groove 39 of the lower filter pressing plate 15, the pressing spring 33 is pressed downwards continuously to generate an upward reaction force to prop against the upper filter cloth and the rubber sealing strip 32, and the pressing is increasingly tight and plays a sealing role. But only can seal mud, can not seal water, even some water seepage will also leak into recess 39, the bottom of recess 39 has water drainage tank 40.

The materials to be treated on the filter cloth are wrapped in a space which is relatively sealed all around and cannot overflow, the oil cylinder 12 of the main press continues to press downwards, the materials to be treated are extruded by the upper layer filter pressing plate 15 and the lower layer filter pressing plate 15 in the process, wastewater can be extruded, the wastewater moves downwards under the action of gravity, passes through the small holes of the water permeable plates 34 and flows into the space between the bottom sealing plate 3 and the water permeable plates 34 to form a closed water containing space, and is gathered in the water drainage groove 40 until the wastewater flows out from the water outlet 37.

2.2, elevating system, be connected to on the filter pressing subassembly, its lift action is used for realizing two effects respectively: the pressure filter plates 15 are driven to rise, and uniform gaps are formed between the adjacent pressure filter plates 15; the respective filter pressing plates 15 are brought down and brought into close contact with the respective filter pressing plates 15.

There are many kinds of structures for realizing the lifting function, and the invention provides a specific structure as follows:

the hanging plate structure uses a plurality of hanging plates 23, each hanging plate 23 is crescent or semicircular, and the hanging plates 23 are conventional and universal parts. And a plurality of hanging plates 23 which are connected and arranged between the adjacent filter pressing plates 15 and are used for keeping the distance between the filter pressing plates 15 in a certain distance range in a separated state. The hanging plates 23 are connected and arranged between the adjacent pressure filter plates 15, and when the pressure filter plates 15 need to be separated, a certain distance can be kept between every two pressure filter plates due to the length limitation of the hanging plates 23; the hanging plate 23 is provided so as not to affect the contact and separation of the filter press plates 15, but only to restrict the filter press plates 15 from being separated at will when separated.

And a jacking oil cylinder 18 is also arranged, and the telescopic rod of the jacking oil cylinder is connected with the topmost filter pressing plate 15. When the telescopic rod of the jacking cylinder 18 extends, the lifting and the falling of each filter pressing plate 15 are driven. Meanwhile, the respective filter press plates 15 are uniformly spaced apart when they are raised and are brought into close contact when they are lowered. When the respective filter press plates 15 are at the time of creating the uniform interval, the cloth can be applied to the upper surfaces of the respective filter press plates 15.

The oil cylinder 12 of the main press rises to drive the press platen 13 to rise, the jacking oil cylinder 18 rises to drive the uppermost press filter plate 15 to move upwards, the semicircular hanging plates 23 on the two sides of the press filter plate 15 also move upwards to drive the suction layer press filter plate to drive the next layer of semicircular hanging plates to move upwards, all the press filter plates 15 are opened at one time, and the jacking oil cylinder 18 also moves all the strokes and then maintains the pressure.

2.3, press 1, vertical setting is in the top of filter pressing subassembly for a plurality of under the filter pressing board 15 in close contact with state, right the filter pressing subassembly produces decurrent pressure, in order to accomplish the filter pressing to the cloth material. The material is a solid-liquid mixture.

Specifically, the press 1 comprises a press upper platform 11, the position of which remains fixed; a main press oil cylinder 12 is arranged and comprises a cylinder body and an expansion rod, the cylinder body is fixedly connected to the upper platform 11 of the press, and the end part of the expansion rod is connected with a press pressing platform 13. The press machine 1 further comprises four filter press plate guide pillars 14, wherein the four filter press plate guide pillars 14 are vertically arranged around the main press machine oil cylinder 12 and are positioned between the press machine upper platform 11 and the bottom plate 17.

The filter pressing plate 15 may further include four guide sleeves 38, each of the guide sleeves 38 is of an annular structure, and is disposed on two sides of the bottom sealing plate 31 and configured to be correspondingly sleeved on each of the filter pressing plate guide pillars 14.

2.4. The working process of the filter press comprises the following steps:

the main press cylinder 12 drives the press platen 13 to move down onto the topmost filter press plate 15. The jacking oil cylinder 18 descends to drive all the filter pressing plates 15 to descend until all the filter pressing plates 15 are folded, and at the moment, the pressure of the press machine 1 is maintained for 10 minutes. In the pressure maintaining process, the filter-pressed wastewater is discharged to the main sewage collecting pipe through the water outlet 37 on the side surface of the filter pressing plate 15, the sewage of the main sewage collecting pipe directly flows into the sewage collecting pit, and then is pumped to the sewage treatment station for treatment, and is discharged to a river or city pipe network after reaching the standard. After keeping the pressure for 10 minutes, the oil cylinder 12 of the main press drives the press table 13 to move upwards until the stroke is finished. The jacking oil cylinder 18 lifts up in an action mode to drive each layer of filter pressing plate 15 to be opened uniformly, solid-liquid matters after filter pressing become mud cakes at the moment, each layer of filter pressing plate 15 rotates filter cloth through the action of the corresponding driving motor, the filter cloth moves forward in a mud discharging direction, the mud cakes move to the end head, are separated from the filter cloth and fall onto a belt conveyor after passing through a mud scraping plate 36, and are sent out of a workshop until the mud cakes are collected in a bucket, and the whole filter pressing process is finished.

At the moment, the sludge pump 20 is opened, every three paths of the sludge distribution nozzles 22 are controlled by a group of electromagnetic valves, the cloth winding motor drives the filter cloth to start rotating forwards until the materials to be processed are fully distributed on the whole filter pressing plate 15, and the motor stops rotating. The mud distributing oil cylinder 20 retracts pneumatically, and the whole mud distributing pipeline retreats and moves out of the gap between the adjacent filter pressing plates 15. And then, simultaneously pressing the main press oil cylinder 12 and the jacking oil cylinder 18 until all the filter presses 15 are completely closed, maintaining the pressure for 10 minutes, and finishing the whole filter pressing process.

Thirdly, the working process of the mud distributing and filter pressing device is implemented according to the following steps:

s1, lifting the jacking oil cylinder 18 to open the filter pressing plates 15;

s2, extending the mud distributing oil cylinder 20 to push the mud distributing nozzle 22 to enter between each layer of filter pressing plates 15 for mud distribution; after the mud distribution is finished, the mud distribution oil cylinder 20 contracts to drive the mud distribution nozzle 22 to withdraw;

s3, the jacking oil cylinder 18 descends to drive the filter pressing plates 15 to be tightly attached, and meanwhile, the press machine 1 presses down the filter pressing plates 15 to perform filter pressing.

One working cycle of mud distribution and filter pressing is as follows: in a state where a gap is generated between adjacent filter press plates 15, the sludge distribution branch pipe 42 is horizontally moved forward to place the plurality of sludge distribution nozzles 22 thereon in the gap for distribution; after the distribution is finished, the sludge distributing branch pipe 42 is horizontally retreated to withdraw from the gap, and then the press machine 1 is started to perform filter pressing.

Specifically, in the initial state, the press machine 1 is retracted to the original position, the jacking oil cylinder 18 is ejected out, the filter press plates 15 in each layer are opened at uniform intervals, and the hanging plates 23 are arranged between the filter press plates 15. The mud distributing oil cylinder 20 extends out, mud distributing nozzles 22 arranged in multiple layers enter the gaps between adjacent layers of the filter pressing plates 15 arranged in multiple layers, the materials to be treated are solid-liquid mixtures after conditioning, and at the moment, pumping and filter pressing can be carried out. The driving motor of each filter pressing plate 15 acts, the filter cloth rotates around the filter pressing plate 15 where the filter cloth is located, the solid-liquid mixture can be conveyed to the whole filter pressing plate 15 in the process, and the mud can be uniformly distributed by limiting through the mud scraping plate 36. When the solid-liquid mixture is distributed to the end of the filter pressing plate 15 far away from the sludge distributing nozzle 22, the sludge pump 20 is controlled to stop working through the sensor arranged on the solid-liquid mixture, the sludge distributing oil cylinder 20 is retracted, the sludge distributing nozzle 22 is completely withdrawn from the interlayer of each filter pressing plate 15, and the sludge distribution stops.

According to the invention, the roller arranged on each laminated filter plate rotates to drive the filter cloth to rotate and be used for discharging mud, so that mud can be discharged from each layer simultaneously, and the overall mud discharging efficiency is high. Whereas the usual discharge apparatus is a continuous Z-folded filter cloth, the discharge time for a filter cake to carry this form of filter cloth over is relatively long.

The press machine is a four-column press machine or a frame type press machine, materials among filter cloth are forcedly dewatered, and the maximum tonnage of the press machine can reach 320t, so that the maximum dewatering rate can reach about 38%. The separated product generally comprises mud cakes with the water content of about 38-45% and separated sewage. The solid-liquid separation aims to provide conditions for later-stage mud cake landfill, incineration and organic fertilizer fermentation. After the sludge is dehydrated, the pollution of a landfill and underground water can be reduced; the incineration cost can be reduced after the sludge is dehydrated; after the sludge is dehydrated, the fermentation speed of the organic fertilizer can be increased, the pollution to the environment and atmosphere can be greatly reduced, and long-term economic and social benefits are achieved.

In the prior art, the basic requirement of the filter cloth in the filter press is that the filter cloth has better water permeability. In a Z-shaped filter cloth arrangement mode which is usually used, 500-meter-long filter cloth can be used at one station of the Z-shaped filter cloth arrangement mode, and the filter cloth needs to reach certain strength because the span of the filter cloth is large and the filter cloth also needs to bear certain pressure; however, in order to facilitate folding, the filter cloth is required to have certain softness, and certain required water permeability must be ensured. The requirements for the filter cloth are high in finishing and the cost is high. The filter cloth in the invention is a closed ring structure arranged around each filter pressing plate, and the length of a single filter pressing plate is usually 1-2 m, so the requirements on the bearing capacity and the softness of the filter cloth are reduced, and the requirement on the water permeability is only required to be met.

Claims

1. The mud distributing and filter pressing device is characterized by comprising a mud distributing machine and a filter press which are matched to work;

wherein, cloth mud machine includes:

a sludge distribution main pipe (41) for conveying the material to be treated;

a plurality of cloth mud branch pipe (42), from top to bottom set up side by side in proper order, every cloth mud branch pipe (42): the inlet ends of the mud distributing nozzles are communicated with the mud distributing main pipe (41), and the outlet ends of the mud distributing nozzles are provided with mud distributing nozzles (22) for distributing the mud;

a movable support mechanism for providing a platform for reciprocating movement of the mud distribution main pipe (41) and the plurality of mud distribution branch pipes (42) in the horizontal direction;

the pressure filter set up in the cloth of cloth mud machine exports the side and includes:

the filter pressing assembly comprises a plurality of filter pressing plates (15) which are horizontally arranged from top to bottom, and the upper surface of each filter pressing plate (15) is used for distributing materials;

the lifting end of the lifting mechanism is connected to the filter pressing assembly, and the lifting action of the lifting mechanism is used for respectively realizing two functions: driving each filter pressing plate (15) to rise, and enabling a gap to be formed between every two adjacent filter pressing plates (15); driving each filter pressing plate (15) to descend and enabling each filter pressing plate (15) to be in close contact;

the press machine (1) is vertically arranged at the top of the filter pressing assembly and is used for pressing the filter pressing assembly downwards to filter press the materials;

the mud distribution branch pipe (42) is used for horizontally moving forward to place a plurality of mud distribution nozzles (22) on the mud distribution branch pipe in a gap between adjacent filter pressing plates (15) for distributing when the gap is generated; and is also used for horizontally retreating to withdraw the gap after the cloth is finished, and then starting the press (1).

2. The sludge press filtration device as defined in claim 1 wherein said movable support means comprises:

the support frame (43) is arranged on the mud distribution main pipe (41) or any one of the mud distribution branch pipes (42), and a sliding block (19) is arranged on the support frame (43);

a bracket (45) which is provided with a track (25) matched with the sliding block and is used for realizing the horizontal reciprocating movement of the supporting frame (43) thereon;

and the end part of a telescopic rod of the mud distributing oil cylinder (20) is connected to the support frame (43) and is used for realizing the movement of the sliding block (19) on the track (25) through the telescopic action of the telescopic rod, so that the horizontal reciprocating movement of the mud distributing branch pipe (42) is realized.

3. The sludge-distributing press-filtering device according to claim 1 or 2, wherein a sludge-limiting plate (44) for limiting the thickness of the sludge and a filter cloth-cleaning nozzle (16) for cleaning the sludge-distributing nozzle (22) are provided near the outlet of the sludge-distributing nozzle (22) of each of the sludge-distributing branch pipes (42).

4. Cloth sludge press filtration device according to claim 1 or 2, wherein said lifting mechanism comprises:

the hanging plates (23) are connected and arranged between the adjacent filter pressing plates (15) and used for keeping the distance between the filter pressing plates (15) in a certain distance range in a separated state;

the telescopic rod of the jacking oil cylinder (18) is connected to the topmost filter pressing plate (15), and the bottom of the cylinder body of the jacking oil cylinder (18) is fixedly arranged on the bottom plate (17); the telescopic rod is used for realizing the distance adjustment between the filter pressing plates (15) through the telescopic action of the telescopic rod.

5. Cloth sludge press filtration device according to claim 4, wherein said press (1) comprises:

a press upper platform (11);

the main press oil cylinder (12) is fixedly connected to the upper platform (11) of the press;

the pressing platform (13) is connected to the end part of the telescopic rod of the oil cylinder (12) of the main press;

the four filter pressing plate guide columns (14) are vertically arranged between the upper platform (11) of the press and the bottom plate (17) and are positioned around the main press oil cylinder (12).

6. Cloth sludge press filtration device according to claim 4, wherein said press filter plate (15) comprises:

a permeable plate (34) which is a flat plate structure provided with a plurality of permeable holes;

the bottom sealing plate (31) is arranged below the water permeable plate (34) at intervals, a closed water containing space is formed between the bottom sealing plate and the water permeable plate (34), and a water outlet (37) is formed in the side part of the bottom sealing plate;

the filter cloth is horizontally and annularly arranged on the water permeable plate (34) and the bottom sealing plate (31), and the upper surface of the filter cloth is used for placing materials to be distributed and is also used for performing rotary motion around the water permeable plate (34) and the bottom sealing plate (31) and then outputting the materials to be distributed after filter pressing outwards;

and the rubber sealing strip (32) is arranged at the bottom of the bottom sealing plate (31).

7. The sludge distributing and filter pressing device as claimed in claim 6, wherein a groove is formed around the outer circumference of the bottom sealing plate (31), a plurality of compression springs (33) are vertically arranged in the groove, one end of each compression spring (33) is fixedly arranged at the bottom sealing plate (31), and the other end is connected with a reset plate (35).

8. Sludge press according to claim 6 or 7, wherein said press plate (15) further comprises:

and the two mud scraping plates (36) are connected with the side wall of the bottom sealing plate (31) and are respectively positioned on the feeding side and the discharging side of the filter pressing plate (15).

9. Sludge press according to claim 6 or 7, wherein said press plate (15) further comprises:

and each guide sleeve (38) is of an annular structure, is arranged on two sides of the bottom sealing plate (31), and is used for being correspondingly sleeved on each filter pressing plate guide post (14).

10. The working method of the mud distribution filter pressing device is characterized by comprising the following steps:

s1, lifting the jacking oil cylinder (18) to separate the filter pressing plates (15);

s2, extending the mud distributing oil cylinder (20) to push the mud distributing nozzle (22) to enter between each layer of filter pressing plate (15) for distributing mud; after the mud distribution is finished, the mud distribution oil cylinder (20) contracts to drive the mud distribution nozzle (22) to withdraw;

s3, the jacking oil cylinder (18) descends to drive each layer of filter pressing plate (15) to be tightly attached, and meanwhile, the press machine (1) presses down each filter pressing plate (15) to filter and press the distributed materials.