CN108159768B

CN108159768B - Steel belt type vacuum air drying filter

Info

Publication number: CN108159768B
Application number: CN201711282592.0A
Authority: CN
Inventors: 冯庸; 沈忠良; 姜安栋; 秦松; 李志浩
Original assignee: Nuclear Industry Yantai Toncin Industry Co ltd
Current assignee: Nuclear Industry Yantai Toncin Industry Co ltd
Priority date: 2017-12-07
Filing date: 2017-12-07
Publication date: 2020-06-09
Anticipated expiration: 2037-12-07
Also published as: CN108159768A

Abstract

The invention discloses a steel belt type vacuum air-drying filter, which comprises a rack, a driving roller and a driven roller, wherein the driving roller and the driven roller are pivoted at two ends of the rack, a speed reducing motor drives the driving roller to rotate, endless metal woven mesh conveying belts are wound on the driving roller and the driven roller, metal wires of the metal woven mesh conveying belts are woven into uniform arched bulges at the outer sides and are flat at the inner sides, and two side edges of the metal woven mesh conveying belts are wrapped and sealed by elastic steel plate belts; the horizontal section of the filter cloth is attached to the metal woven mesh conveying belt and moves along with the moving of the metal woven mesh conveying belt, a vacuum chamber is arranged on the rack and corresponds to the lower surface of the upper metal woven mesh conveying belt, the vacuum chamber is supported by more than two first hydraulic cylinders fixedly arranged on the rack, and the vacuum chamber is connected with the vacuum balance automatic drainage tank through a pipeline; an air drying device is arranged above the filter cloth and at a position corresponding to the rear section of the vacuum chamber. The invention simplifies the structure, prolongs the service life and reduces the noise; reduce the water content of the filter cake and improve the filtering effect.

Description

Steel belt type vacuum air drying filter

Technical Field

The invention relates to the technical field of solid-liquid separation equipment, in particular to a steel belt type vacuum air drying filter.

Background

The rubber belt type vacuum filter is a device which uses vacuum negative pressure as driving force to realize solid-liquid separation. Under the action of vacuum negative pressure (0.04-0.07MPa), liquid in the suspension is pumped out through the filtering medium (filter cloth), and solid particles are intercepted by the medium, so that the separation of liquid and solid is realized. The filtering sections are arranged along the horizontal length direction in the structure, and can continuously complete the operations of filtering, washing, sucking, filter cloth regeneration and the like. Has the advantages of high filtration efficiency, large production capacity, good washing effect, low water content of filter cakes, flexible operation, low maintenance cost and the like. The method is widely applied to solid-liquid separation in the fields of metallurgy, mining, chemical industry, papermaking, food, pharmacy, environmental protection and the like, and particularly has good application in gypsum dehydration in flue gas desulfurization.

The rubber belt and the grid plate positioned above the rubber belt in the rubber belt type vacuum filter are indispensable important parts, but the rubber belt and the vacuum cavity are in sliding connection in the operation process of the equipment, so that the rubber belt is quickly worn, and the service life of the equipment is influenced.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, and discloses a steel belt type vacuum air-drying filter, which comprises a frame, a driving roller and a driven roller, wherein the driving roller and the driven roller are pivoted at two ends of the frame, and a speed reducing motor drives the driving roller to rotate, and the steel belt type vacuum air-drying filter is different from the prior art in that: the driving roller and the driven roller are wound with metal woven mesh conveying belts, metal wires of the metal woven mesh conveying belts are woven into uniform arched bulges at the outer sides and are flat at the inner sides, and the edges of the two sides of the metal woven mesh conveying belts are wrapped and sealed by elastic steel plate belts; the horizontal section of the filter cloth is attached to the metal woven mesh conveying belt and moves along with the moving of the metal woven mesh conveying belt, a vacuum chamber is arranged on the rack and corresponds to the lower surface of the upper metal woven mesh conveying belt, the vacuum chamber is supported by more than two first hydraulic cylinders fixedly arranged on the rack, and the vacuum chamber is connected with the vacuum balance automatic drainage tank through a pipeline; and an air drying device is arranged above the filter cloth and in a position corresponding to the rear section of the vacuum chamber.

Further, air-dry the device and include the air-dry chamber, a plurality of air-dry sealed rollers are established to air-dry chamber lower extreme pivot, air-dry sealed roller axial with the axial direction parallel of drive roller or driven voller, air-dry sealed roller circumference excircle support press in on the filter cake on the filter cloth

Furthermore, at least one group of filter cloth compression rollers is fixedly arranged on the rack close to one side of the driven roller and above the horizontal section corresponding to the filter cloth, a material distributing hopper is fixedly arranged on the inner side of each filter cloth compression roller, and a material distributing device is fixedly arranged on the inner side of each material distributing hopper; and a cloth sealing elastic cushion is arranged below the lower surface of the upper metal woven mesh conveying belt and in a position corresponding to the filter cloth compression roller, and the cloth sealing elastic cushion is supported by a second hydraulic cylinder fixedly arranged on the rack.

Further, the bearing seat of the driven roller is an adjustable bearing seat capable of horizontally displacing.

Furthermore, at least one pull-cord switch is fixedly arranged on the machine frame, a pull cord of the pull-cord switch is connected with the vacuum chamber, and when the upper edge of the vacuum chamber is in contact with the lower surface of the metal mesh grid conveyor belt, the pull-cord switch controls a piston rod of the first hydraulic cylinder to retract.

The filter cloth tensioning device comprises a tensioning adjusting roller, a tensioning arm and a tensioning cylinder; the filter cloth deviation rectifying device comprises a deviation rectifying pneumatic spring.

Compared with the prior art, the invention has the beneficial effects that:

1. compared with the traditional rubber belt type vacuum filter or the traditional moving disc type vacuum filter, the steel belt type vacuum filter integrates the advantages of the rubber belt type vacuum filter and the moving disc type vacuum filter, the equipment structure is simplified, the hydraulic cylinder drives the vacuum cavity to lift, the friction between the metal mesh grid conveyer belt and the vacuum cavity in the operation process is reduced, the service life of the increased vacuum cavity is prolonged, and the noise generated in the operation process of the conveyer belt is reduced;

2. after the vacuum filtration process, a top air drying procedure is added, so that the water content of a filter cake is reduced, and the filtering effect of equipment is improved;

3. because the inner surface of the metal mesh grid conveyer belt is flat, the outer surface of the metal mesh grid conveyer belt is provided with the bulges which are uniformly distributed, the filter cloth is matched with the bulges, the use of a grating plate can be replaced, and one metal mesh grid conveyer belt can realize double functions of conveying and permeable filtering;

4. the vacuum box is driven to lift by adopting a hydraulic cylinder, and the pull-cord switch is matched for detecting and positioning, so that the control of precise lifting and sealing compaction of the vacuum chamber can be realized, and the automatic control of the filtering process can be completed;

5. compared with the prior filtering device which completes suction filtration by matching parts such as a vacuum box, a sliding table, a friction belt and the like, the steel belt type vacuum filter reduces consumption of wearing parts and increases the service cycle and continuous operation time of the device.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a side view of fig. 1.

Fig. 3 is a partial structure schematic view of the metal mesh-woven conveyor belt of the invention.

Detailed Description

The invention is further described below with reference to the accompanying drawings and examples. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third," if used, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "in communication with" are to be construed broadly, and may be, for example, fixedly, detachably, or integrally connected, mechanically, electrically, directly or indirectly through intervening elements, or in communication between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

A steel belt type vacuum air-drying filter comprises a frame 20, a driving roller 6 and a driven roller 18 which are pivoted at two ends of the frame 20, a speed reduction motor drives the driving roller 6 to rotate, a metal woven mesh conveying belt 17 is wound on the driving roller 6 and the driven roller 18, metal wires of the metal woven mesh conveying belt are woven into uniform arched bulges 171 at the outer side and are flat at the inner side, and edges at two sides of the metal woven mesh conveying belt are wrapped and sealed by an elastic steel plate belt 172; the horizontal section of the filter cloth 8 is attached to the metal woven mesh conveyer belt 17 and advances along with the advancing of the metal woven mesh conveyer belt 17, a vacuum chamber 12 is arranged on the rack 20 and corresponds to the lower surface of the upper metal woven mesh conveyer belt 17, the vacuum chamber 12 is supported by more than two first hydraulic cylinders 3 fixedly arranged on the rack, and the vacuum chamber 12 is connected with a vacuum balance automatic drainage tank 21 through a pipeline; and an air drying device is arranged above the filter cloth 8 and in a position corresponding to the rear section of the vacuum chamber.

Air-dry the device and include air-dry chamber 23, a plurality of air-dry sealing roller 22 are established to air-dry 23 lower extreme pivots in chamber, air-dry sealing roller 22 axial with the axial direction parallel of drive roller or driven voller, air-dry sealing roller 22 circumference excircle support press on the filter cake on the filter cloth.

At least one group of filter cloth compression rollers 2 is fixedly arranged on the rack 20 close to one side of the driven roller 18 and above the horizontal section corresponding to the filter cloth 8, a material distribution hopper 3 is fixedly arranged on the inner side of each filter cloth compression roller 2, and a material distributor 4 is fixedly arranged on the inner side of each material distribution hopper 3; and a cloth sealing elastic cushion 15 is arranged below the lower surface of the upper metal woven mesh conveying belt 17 and at a position corresponding to the filter cloth compression roller 2, and the cloth sealing elastic cushion 15 is supported by a second hydraulic cylinder 1 fixedly arranged on the rack.

The bearing seat of the driven roller is an adjustable bearing seat 19 which can be horizontally displaced.

At least one pull rope switch 14 is fixedly arranged on the frame 20, a pull rope of the pull rope switch 14 is connected with the vacuum chamber 12, and when the upper edge of the vacuum chamber 12 is contacted with the lower surface of the metal mesh grid conveyor belt 17, the pull rope switch 14 controls the piston rod of the first hydraulic cylinder 3 to retract.

The device comprises a frame, a filter cloth cleaning device 7, a filter cloth tensioning device and a filter cloth deviation correcting device, wherein the frame is fixedly provided with a frame, and the filter cloth tensioning device comprises a tensioning adjusting roller 11, a tensioning arm 9 and a tensioning cylinder 10; the filter cloth deviation rectifying device comprises a deviation rectifying pneumatic spring 16.

Before feeding, a tensioning cylinder drives a tensioning device to tension filter cloth to enable the filter cloth to be tightly attached to a metal woven mesh conveying belt, a second hydraulic cylinder drives a cloth sealing elastic cushion to rise and to be tightly contacted with a filter cloth pressing roller to form sealing at the front section of a distributor so as to prevent material side leakage, meanwhile, a first hydraulic cylinder 13 drives a filtrate cavity to rise to form a vacuum cavity with the metal woven mesh conveying belt and the filter cloth, feeding is carried out by externally arranging a feeding pump to convey materials in a slurry pool to a feeding port of the distributor, a flow meter is used for controlling the materials to form a uniform slurry layer on the filter cloth, a vacuum pump arranged on equipment is started to carry out vacuum suction in the feeding process so as to realize solid-liquid separation of slurry, according to the process time control of debugging of the equipment, the satisfied filter cake discharge condition is reached, corresponding valves for butting the vacuum pump and the equipment are, the filter cloth and the metal mesh grid conveyer belt run together, when the materials reach the air drying device, a sealing roller of the air drying device is in contact with a filter cake to form a sealing cavity, dry pressure gas is introduced through an air inlet of the air drying device to air the filter cake for the second time, the moisture is further reduced, the speed reducer drives the metal conveyer belt and the filter cloth to realize the continuous discharging process, and the filter cloth cleans the attached materials on the filter cloth through the cleaning device to perform the subsequent filtering process. The unloading process is realized, and the filter cloth cleans the materials attached to the filter cloth through the cleaning device, so that the subsequent filtering process is carried out. The filter cloth skew conveyer belt can appear at the operation in-process, and the skew condition can touch the driving lever switch when the filter cloth appears, and driving lever switching signal is through automatically controlled cabinet, pneumatic control cabinet, and the pneumatic spring of rectifying of control carries out the filter cloth adjustment of rectifying.

Claims

1. The utility model provides a steel band formula vacuum air-dry filter, includes the frame, and the pivot is established the drive roller and the driven voller at frame both ends, gear motor drives the drive roller is rotatory, its characterized in that: the driving roller and the driven roller are wound with metal woven mesh conveying belts, metal wires of the metal woven mesh conveying belts are woven into uniform arched bulges at the outer sides and are flat at the inner sides, and the edges of the two sides of the metal woven mesh conveying belts are wrapped and sealed by elastic steel plate belts; the horizontal section of the filter cloth is attached to the metal woven mesh conveying belt and moves along with the moving of the metal woven mesh conveying belt, a vacuum chamber is arranged on the rack and corresponds to the lower surface of the upper metal woven mesh conveying belt, the vacuum chamber is supported by more than two first hydraulic cylinders fixedly arranged on the rack, and the vacuum chamber is connected with the vacuum balance automatic drainage tank through a pipeline; and an air drying device is arranged above the filter cloth and in a position corresponding to the rear section of the vacuum chamber.

2. The steel belt vacuum air drying filter of claim 1, characterized in that: the air-dry device comprises an air-dry cavity, a plurality of air-dry sealing rollers are arranged at the lower end of the air-dry cavity in a pivoted mode, the axial direction of each air-dry sealing roller is parallel to the axial direction of the driving roller or the driven roller, and the circumferential outer circle of each air-dry sealing roller is pressed on a filter cake on the filter cloth.

3. The steel belt vacuum air drying filter of claim 1, characterized in that: at least one group of filter cloth compression rollers are fixedly arranged on the rack close to one side of the driven roller and above the horizontal section corresponding to the filter cloth, a material distributing hopper is fixedly arranged on the inner side of each filter cloth compression roller, and a material distributing device is fixedly arranged on the inner side of each material distributing hopper; and a cloth sealing elastic cushion is arranged below the lower surface of the upper metal woven mesh conveying belt and in a position corresponding to the filter cloth compression roller, and the cloth sealing elastic cushion is supported by a second hydraulic cylinder fixedly arranged on the rack.

4. The steel belt vacuum air drying filter of claim 1, characterized in that: the bearing seat of the driven roller is an adjustable bearing seat capable of horizontally displacing.

5. The steel belt vacuum air drying filter of claim 1, characterized in that: and when the upper edge of the vacuum chamber is contacted with the lower surface of the metal mesh grid conveyer belt, the pull-cord switch controls the piston rod of the first hydraulic cylinder to retract.

6. The steel belt vacuum air drying filter of claim 1, characterized in that: the filter cloth tensioning device comprises a tensioning adjusting roller, a tensioning arm and a tensioning cylinder; the filter cloth deviation rectifying device comprises a deviation rectifying pneumatic spring.