CN215137769U - Slurry-coating, filtering and back-blowing integrated filtering device - Google Patents

Abstract

The utility model discloses a filtering device integrating slurry hanging, filtering and back flushing, which comprises a slurry hanging unit, a filtering unit and a back flushing unit; the slurry hanging unit comprises a slurry hanging groove, a first slurry hanging passage and a second slurry hanging passage; the filtering unit comprises a feeding pipeline, a filtering tank and a liquid-liquid delivering pipe; the back-blowing unit comprises a back-blowing air inlet pipe and an exhaust pipe; the slurry hanging unit also comprises a universal pipe, one end of the universal pipe is connected with a liquid outlet arranged at the end part of a transmission pipe extending out of the filtering tank, and the other end of the universal pipe is connected with one end of a second slurry hanging passage, one end of a back-blowing air inlet pipe and one end of a clear liquid pipe; the utility model discloses realized hanging thick liquid, filtration and the three process of blowback with same set of equipment, saved the material, also improved filterable effect simultaneously and solved among the prior art technical problem that filter equipment is with high costs.

Description

Slurry-coating, filtering and back-blowing integrated filtering device

Technical Field

The utility model belongs to the technical field of water treatment, a filter equipment is related to, specifically a filter equipment who hangs thick liquid, filters and blowback integration.

Background

The diatomite filter tank is widely applied to the industries of chemical industry, food, electronics, medicine and the like. The filtering element of the filtering tank is a core component of the diatomite filtering tank, and is a pipe with holes as a framework, the outer surface of the pipe is wound with wires, and the wires are coated with a diatomite covering layer. The filtering period of the filtering tank is divided into three steps of slurry hanging, filtering and back flushing. After filtration, water or compressed air or both are often used for back flushing.

The filtering tank is a device which is commonly used for eliminating impurities in media on a medium conveying pipeline, wherein the most common filtering tank is a bag type filtering tank which is a common pressure type filtering tank, the main structure of the filtering tank comprises a cylinder body, a filtering bag is arranged in the cylinder body, a medium inlet and a medium outlet are arranged on the periphery of the cylinder body, but the existing bag type filtering tank is generally made of stainless steel, and a liquid container and a supporting frame of the filtering tank are respectively made of the stainless steel materials which are processed separately and then welded together

The slurry hanging, filtering and back flushing in the filtering device in the prior art are respectively provided with a pipeline, so that the manufacturing cost of the equipment is increased, the floor area of the equipment is increased, and in short, the cost of a user is increased.

Disclosure of Invention

Not enough to prior art exists, the utility model aims to provide a hang filter equipment of thick liquid, filtration and blowback integration, solved the filter equipment among the prior art technical problem with high costs.

In order to solve the technical problem, the utility model discloses a following technical scheme realizes:

a filtering device integrating slurry hanging, filtering and back blowing comprises a slurry hanging unit, a filtering unit and a back blowing unit;

the slurry hanging unit comprises a slurry hanging groove, a first slurry hanging passage and a second slurry hanging passage; the filtering unit comprises a feeding pipeline, a filtering tank and a liquid-liquid delivering pipe; the back-blowing unit comprises a back-blowing air inlet pipe and an exhaust pipe;

the slurry hanging unit also comprises a universal pipe, one end of the universal pipe is connected with a liquid outlet arranged at the end part of a transmission pipe extending out of the filtering tank, and the other end of the universal pipe is connected with one end of a second slurry hanging passage, one end of a back-blowing air inlet pipe and one end of a clear liquid pipe;

the general pipe is divided into a first general branch and a second general branch which are parallel; the first universal branch is provided with a first universal branch valve, and the second universal branch is provided with a second universal branch valve;

a first slurry coating valve is arranged on the first slurry coating passage; the second slurry coating passage is provided with a second slurry coating valve; the feeding pipeline is provided with a feeding valve, and the liquid inlet pipe is provided with a liquid outlet valve; and a back-blowing air inlet valve is arranged on the back-blowing air inlet pipe.

The utility model discloses still have following technical characteristic:

specifically, one end of the first slurry hanging passage is connected with a slurry hanging discharge hole formed in the upper bottom of the slurry hanging groove, and the other end of the first slurry hanging passage is connected with the filtering unit; the other end of the second slurry hanging passage is connected with a circulating slurry hanging feed back port arranged at the top of the slurry hanging groove;

one end of the feeding pipeline is provided with a dirty liquid inlet to be filtered, and the other end of the feeding pipeline is communicated with the first slurry hanging passage; a transmission pipe is arranged in the filter tank, one end of the transmission pipe is sealed, the other end of the transmission pipe extends out of the filter tank, and a liquid outlet is formed in the end part of the transmission pipe extending out of the filter tank; the other end of the clear liquid pipe is provided with a clear liquid outlet;

the other end of the back-blowing air inlet pipe is connected with an air source; one end of the exhaust pipe is connected with an exhaust port formed in the top of the filter tank; the other end of the exhaust pipe is provided with an exhaust control port.

Specifically, the first slurry hanging passage is connected with the filtering unit through a feeding hole which is formed in the side wall of the filtering tank and is close to the bottom of the filtering tank.

Specifically, an air inlet is formed in the side wall of the filtering tank in the direction opposite to the liquid outlet, a first air inlet pipe is connected to the air inlet, and an air source is connected to the other end of the first air inlet pipe.

Specifically, a plurality of liquid inlets are formed in the side wall of the transmission pipe in the filter tank, and the liquid inlets are correspondingly and fixedly connected with a plurality of flow guide pipes.

Specifically, the outer sides of the plurality of flow guide pipes are provided with filter bags.

Specifically, the conical side wall of the filter tank is provided with a residual liquid discharge opening close to the bottom, the residual liquid discharge opening is connected with a residual liquid discharge pipe, and the other end of the residual liquid discharge pipe is communicated with the second slurry hanging passage.

Specifically, a residual liquid discharge control valve is arranged on the residual liquid discharge pipe.

Specifically, the bottom of the filter tank is provided with a slag discharge port.

Specifically, the flow guide pipe comprises an outer pipe, a clear liquid output pipe is arranged at the axial front end of the outer pipe, and a blocking plate is arranged at the axial tail end of the outer pipe; the outer pipe is provided with a plurality of filtering holes;

a clear liquid conveying pipe with the outer diameter smaller than the inner diameter of the outer pipe is coaxially arranged inside the outer pipe, and a gap is formed between the outer pipe and the clear liquid conveying pipe; the axial front end of the clear liquid transmission pipe extends into the clear liquid output pipe; clear liquid flowing into the filter holes on the outer pipe enters the clear liquid conveying pipe from the axial tail end of the clear liquid conveying pipe;

the outer pipe, the clear liquid output pipe and the clear liquid transmission pipe are connected through a special-shaped connecting ring;

the outer wall of the clear liquid output pipe is provided with a filter cloth fixing groove, and a filter cloth fixing ring matched with the filter cloth fixing groove is arranged in the filter cloth fixing groove.

Specifically, the outer wall of the special-shaped connecting ring comprises a first surface, a second surface and a third surface which are distributed along the axial direction, and a fourth surface and a fifth surface which are distributed along the radial direction;

the third surface of the outer wall of the special-shaped connecting ring is fixedly connected with the inner wall of the outer tube, and the fifth surface of the outer wall of the special-shaped connecting ring is fixedly connected with the end surface of the axial front end of the outer tube; the first surface of the outer wall of the special-shaped connecting ring is connected with the inner wall of the clear liquid output pipe, and the fourth surface of the outer wall of the special-shaped connecting ring is in contact with the end face of the axial tail end of the clear liquid output pipe; the second surface of the outer wall of the special-shaped connecting ring is flush with the outer wall of the clear liquid output pipe and the outer wall of the outer pipe;

the inner wall of the special-shaped connecting ring is fixedly connected with the outer wall of the clear liquid conveying pipe.

Specifically, the first surface of the outer wall of the special-shaped connecting ring is in threaded connection with the inner wall of the clear liquid output pipe.

Specifically, the clear liquid in the outer tube enters the clear liquid conveying tube in two ways, one way is that the axial rear end of the clear liquid conveying tube is not contacted with a blocking plate arranged at the axial tail end of the outer tube; the other is that the axial rear end of the clear liquid conveying pipe is contacted with a blocking plate arranged at the axial tail end of the outer pipe, but a liquid inlet ring groove is arranged at the position close to the blocking plate.

Compared with the prior art, the utility model, profitable technological effect is:

(I) the utility model discloses well general pipe set up the unique sanction, divide into first general branch road and the general branch road of second with general pipe, at the effect homogeneous difference of the first general branch road and the general branch road of second of hanging thick liquid, filtration and the general pipe of blowback in-process, promptly realized hanging thick liquid, filtration and the three process of blowback with same set of equipment, saved the material, also improved filterable effect simultaneously, solved among the prior art technical problem that filter equipment is with high costs.

(II) compared with the prior art, the utility model discloses set up the clear liquid transmission pipe in the outer tube, guaranteed that more clear liquids enter into the unit of next link for less liquid is stayed in the filtration jar, and at the in-process of blowback, the filter cake drops more easily.

(III) the utility model provides a special-shaped go-between has connected outer tube, clear liquid transmission pipe and clear liquid connecting pipe, has saved the raw and other materials cost of device, has also made things convenient for the installation simultaneously.

Drawings

Fig. 1 is a schematic view of the overall structure of the integrated device for slurry coating, filtering and back flushing in the present invention.

Fig. 2 is a schematic view of a part of the structure of the integrated device for slurry coating, filtering and back flushing in the present invention.

Fig. 3 is a schematic view of the overall structure of the middle flow guide pipe of the present invention.

Fig. 4 is a schematic sectional view of the middle flow guide pipe of the present invention.

Fig. 5 is a partially enlarged schematic view of the middle flow guide tube of the present invention.

Fig. 6 is a concrete structure of the special-shaped connecting ring of the middle flow guide pipe of the present invention.

The meaning of the individual reference symbols in the figures is: 1-a pulp hanging unit, 2-a filtering unit, 3-a back blowing unit, 4-an air source and 5-a first air inlet pipe;

101-slurry coating groove, 102-first slurry coating passage, 103-universal pipe, 104-second slurry coating passage, 105-first slurry coating valve, 106-second slurry coating valve;

10101-slurry coating discharge port, 10102-circular slurry coating return port;

10301-a first general branch, 10302-a second general branch, 10303-a first general branch valve, 10304-a second general branch valve;

201-feed line, 202-filter tank, 203-clear liquid pipe;

20101, a sewage inlet to be filtered, 20102, a feeding valve;

20201-conveying pipe, 20202-exhaust port, 20203-air inlet, 20204-feeding hole, 20205-guide pipe, 20206-filter bag, 20207-residual liquid discharge port, 20208-residual liquid discharge pipe, 20209-residual liquid discharge control valve and 202010-slag discharge port;

2020101-outlet, 2020102-inlet;

20301-to the clear liquid outlet; 20302-to clear liquid outlet valve; 2020501-outer tube, 2020502-special connecting ring, 2020503-clear liquid output tube, 2020504-clear liquid transmission tube, 2020505-screw thread, 2020506-filtering hole, 2020507-blocking plate;

202050201-first face, 202050202-second face, 202050203-third face, 202050204-fourth face, 202050205-fifth face;

202050301-filter cloth fixing groove, 202050302-filter cloth fixing ring;

301-blowback air inlet pipe, 302-exhaust pipe, 303-exhaust control port and 304-blowback air inlet valve.

The following examples are provided to explain the present invention in further detail.

Detailed Description

It should be noted that all the components of the present invention are known in the art, and the components are not specifically described.

The following embodiments of the present invention are given, and it should be noted that the present invention is not limited to the following embodiments, and all the equivalent transformations made on the basis of the technical solution of the present application all fall into the protection scope of the present invention.

Example 1:

the embodiment provides a filtering device integrating slurry hanging, filtering and back blowing, and as shown in fig. 1 to 6, the filtering device integrating slurry hanging, filtering and back blowing comprises a slurry hanging unit 1, a filtering unit 2 and a back blowing unit 3;

the slurry hanging unit 1 comprises a slurry hanging groove 101, a first slurry hanging passage 102 and a second slurry hanging passage 104; the filtration unit 2 comprises a feed line 201, a filtration tank 202 and a to clear liquid line 203; the back flushing unit 3 comprises a back flushing air inlet pipe 301 and an exhaust pipe 302;

the slurry hanging unit 1 further comprises a general pipe 103, one end of the general pipe 103 is connected with a liquid outlet 2020101 arranged at the end part of a transmission pipe 20201 extending out of the filter tank 202, and the other end of the general pipe 103 is connected with one end of a second slurry hanging passage 104, one end of a blowback air inlet pipe 301 and one end of a clear liquid pipe 203;

the general pipe is divided into a first general branch 10301 and a second general branch 10302 which are parallel; a first general branch valve 10303 is arranged on the first general branch 10301, and a second general branch valve 10304 is arranged on the second general branch 10302;

a first slurry coating valve 105 is arranged on the first slurry coating passage 102; the second slurry coating passage 104 is provided with a second slurry coating valve 106; a feeding valve 20102 is arranged on the feeding pipeline 201, and a clear liquid outlet valve 20302 is arranged on the clear liquid pipe 203; the blowback air inlet pipe 301 is provided with a blowback air inlet valve 304.

As a preferable scheme of this embodiment, one end of the first slurry coating passage 102 is connected to a slurry coating discharge port 10101 formed at the upper bottom of the slurry coating tank 101, and the other end of the first slurry coating passage 102 is connected to the filtering unit 2; the other end of the second slurry coating passage 104 is connected with a circular slurry coating feed back port 10102 arranged at the top of the slurry coating groove 101;

one end of the feeding pipeline 201 is provided with a to-be-filtered dirty liquid inlet 20101, and the other end of the feeding pipeline 201 is communicated with the first slurry hanging passage 102; a conveying pipe 20201 is arranged in the filter tank 202, one end of the conveying pipe 20201 is closed, the other end of the conveying pipe extends out of the filter tank 202, and a liquid outlet 2020101 is arranged at the end part of the conveying pipe 20201 extending out of the filter tank 202; the other end of the clear liquid pipe 203 is provided with a clear liquid outlet 20301;

the other end of the back flushing air inlet pipe 301 is connected with an air source 4; one end of the exhaust pipe 302 is connected with an exhaust port 20202 formed at the top of the filter tank 202; the other end of the exhaust pipe 302 is provided with an exhaust control port 303.

As a preferable scheme of this embodiment, the first slurry hanging passage 102 is connected to the filtering unit 2 through a feeding hole 20204 formed on the side wall of the filtering tank 202 near the bottom.

As a preferable scheme of this embodiment, an air inlet 20203 is disposed on the side wall of the filter tank 202 in a direction opposite to the liquid outlet 2020101, the air inlet 20203 is connected to a first air inlet pipe 5, the other end of the first air inlet pipe 5 is connected to an air source 4, and the air inlet pipe is mainly disposed to allow the diatomite solvent and the dirty liquid to be filtered to reach the filter pipe through the pressure change in the filter tank.

As a preferable scheme of this embodiment, the side wall of the transmission pipe 20201 in the filter tank 202 is provided with a plurality of liquid inlets 2020102, the plurality of liquid inlets 2020102 are correspondingly and fixedly connected with a plurality of filter pipes 20205, and the liquid inlets and the liquid outlets are mainly configured to convey the filtered clear liquid to the next link.

As a preferable scheme of this embodiment, the filter bags 20206 are disposed outside the plurality of filter pipes 20205, and the filter bags are disposed to match with the filtering, which is a routine operation in the art.

As a preferable scheme of the embodiment, a residual liquid discharge port 20207 is arranged on the conical side wall of the filtering tank 202 close to the bottom, the residual liquid discharge port 20207 is connected with a residual liquid discharge pipe 20208, the other end of the residual liquid discharge pipe 20208 is communicated with the second slurry hanging passage 104, and the residual liquid discharge pipe is arranged mainly for treating residual liquid which is incompletely treated by back blowing, so that the residual liquid is recycled to the slurry hanging groove, and the cost is saved.

As a preferable scheme of this embodiment, the raffinate discharge pipe 20208 is provided with a raffinate discharge control valve 20209, which is provided to prevent the diatomite solvent and the effluent to be treated from flowing out of the raffinate discharge pipe during slurry coating and filtration.

As a preferable scheme of this embodiment, the bottom of the filter tank 202 is provided with a residue discharge port 202010 for discharging the residue obtained by the blowback treatment to the outside of the apparatus.

The guide pipe comprises an outer pipe 2020501, a clear liquid output pipe 2020503 is arranged at the axial front end of the outer pipe 2020501, and a blocking plate 2020507 is arranged at the axial tail end of the outer pipe 2020501; the outer pipe 2020501 is provided with a plurality of filtering holes 2020506;

as a preferable scheme of this embodiment, the clear liquid transfer pipe 2020504 with an outer diameter smaller than the inner diameter of the outer pipe 2020501 is coaxially arranged inside the outer pipe 2020501, and a gap exists between the outer pipe 2020501 and the clear liquid transfer pipe 2020504; the axial front end of the clear liquid transmission pipe 2020504 extends into the clear liquid output pipe 2020503; clear liquid flowing into the filter holes on the outer pipe 2020501 enters the clear liquid conveying pipe from the axial tail end of the clear liquid conveying pipe;

the outer pipe 2020501, the clear liquid output pipe 2020503 and the clear liquid transmission pipe 2020504 are connected through a special-shaped connecting ring 2020502;

the outer wall of the clear liquid outlet pipe 2020503 is provided with a filter cloth fixing groove 202050301, and a filter cloth fixing ring 202050302 matched with the filter cloth fixing groove 202050301 is arranged in the filter cloth fixing groove 202050301.

As a preferable solution of this embodiment, the outer wall of the shaped connector ring 2020502 includes a first face 202050201, a second face 202050202 and a third face 202050203 distributed along the axial direction, and a fourth face 202050204 and a fifth face 202050205 distributed along the radial direction;

the third surface 202050203 of the outer wall of the special-shaped connecting ring 2020502 is fixedly connected with the inner wall of the outer tube 2020501, and the fifth surface 202050205 of the outer wall of the special-shaped connecting ring 2020502 is fixedly connected with the end surface of the axial front end of the outer tube 2020501; the first surface 202050201 of the outer wall of the special-shaped connecting ring 2020502 is connected with the inner wall of the clear liquid outlet pipe 2020503, and the fourth surface 202050204 of the outer wall of the special-shaped connecting ring 2020502 is in contact with the end surface of the axial tail end of the clear liquid outlet pipe 2020503; the second surface 202050202 of the outer wall of the special-shaped connecting ring 2020502 is flush with the outer wall of the clear liquid output pipe 2020503 and the outer wall of the outer pipe 2020501;

the inner wall of the shaped connecting ring 2020502 is fixedly connected with the outer wall of the clear liquid transferring pipe 2020504.

As a preferable solution of this embodiment, the first surface 202050201 of the outer wall of the shaped connection ring 2020502 is connected with the inner wall of the clear liquid output tube 2020503 by a screw thread 2020505, and the screw thread connection makes the detachment more convenient.

As a preferable scheme of this embodiment, there are two ways of the clear liquid in the outer pipe 2020501 entering the clear liquid transfer pipe 2020504, one way is that the axial rear end of the clear liquid transfer pipe 2020504 is not in contact with the blocking plate 2020507 arranged at the axial end of the outer pipe 2020501; the other is that the rear end of the clear liquid conveying pipe 2020504 in the axial direction is contacted with a blocking plate 2020507 arranged at the tail end of the outer pipe 2020501 in the axial direction, but a liquid inlet ring groove 2020508 is arranged at the position close to the blocking plate 2020507, so that liquid inlet is smoother, and the specific selection mode is selected according to actual installation requirements.

A filter tank comprises a filter tank 202, wherein a transmission pipe 20201 is arranged in the filter tank 202, one end of the transmission pipe 20201 is sealed, the other end of the transmission pipe extends out of the filter tank 202, and a liquid outlet 2020101 is arranged at the end part of the transmission pipe 20201 extending out of the filter tank 202;

the top of the filter tank 202 is provided with an exhaust port 20202; a feed hole 20204 formed on the side wall of the filter tank 202 near the bottom;

the side wall of the transmission pipe 20201 in the filter tank 202 is provided with a plurality of liquid inlets 2020102, and the plurality of liquid inlets 2020102 are correspondingly and fixedly connected with the axial front ends of the clear liquid output pipes 2020503 in the plurality of flow guide pipes 20205;

the outside of the draft tube 20205 is provided with a filter bag 20206.

As a preferable scheme of this embodiment, a residual liquid outlet 20207 is provided on the tapered side wall of the filtration tank 202 near the bottom, and the residual liquid outlet 20207 is connected to a residual liquid outlet pipe 20208.

As a preferable scheme of this embodiment, the raffinate discharge pipe 20208 is provided with a raffinate discharge control valve 20209, which is provided to prevent the diatomite solvent and the effluent to be treated from flowing out of the raffinate discharge pipe during slurry coating and filtration.

As a preferable scheme of this embodiment, the bottom of the filter tank 202 is provided with a residue discharge port 202010 for discharging the residue obtained by the blowback treatment to the outside of the apparatus.

The utility model provides a hang thick liquid, filtration and blowback integrated device's working process as follows:

when the slurry is coated, first, the first slurry coating valve 105, the first general branch valve 10303, the second general branch valve 10304, the second slurry coating valve 106, and the residual liquid discharge control valve 20209 are opened, and the feed valve 20102, the clear liquid discharge valve 20302, and the back-blowing air inlet valve 304 are closed. Then, the diatomite solvent in the slurry hanging tank 101 enters the first slurry hanging passage 102 from the slurry hanging discharge port 10101 at the bottom of the slurry hanging tank 101, and then enters the filter tank 202, meanwhile, the gas in the gas source 4 enters the filter tank 202 through the first gas inlet pipe 5, the pressure in the filter tank 202 increases with the increase of the gas, the diatomite solvent is squeezed to the upper part of the filter tank 202 for slurry hanging, the diatomite solvent after slurry hanging is finished enters the transfer pipe 20201 through the liquid inlet 2020102 from the flow guide pipe 20205, and then enters the general pipe 103 from the liquid outlet 2020101 of the transfer pipe 20201, namely, the diatomite solvent passes through the first general branch 10301 and the second general branch 10302, finally enters the second slurry hanging passage 104, and then enters the slurry hanging tank 101 from the second slurry hanging passage 104 through the circulating slurry hanging return port 3502 at the top of the slurry hanging tank 101.

When filtering, firstly, the feeding valve 20102, the first general branch valve 10303, the second general branch valve 10304 and the clear liquid outlet valve 20302 are opened, and the first slurry coating valve 105, the second slurry coating valve 106, the residual liquid discharge control valve 20209 and the back-blowing air inlet valve 304 are closed. Then the dirty liquid to be filtered enters the feeding pipeline 201 from the dirty liquid inlet 20101 to be filtered, then enters the filter tank 202 through the feeding hole 20204, meanwhile, the gas in the gas source 4 enters the filter tank 202 through the first gas inlet pipe 5, the pressure in the filter tank 202 increases with the increase of the gas, the dirty liquid to be filtered is squeezed to the upper part of the filter tank 202, firstly, the gas passes through the filter bag 20206, most impurities are filtered on the surface of the filter bag 20206, then, the gas is filtered through the guide pipe 20205, the filtered clean liquid enters the transmission pipe 20201 from the guide pipe 20205 through the liquid inlet 2020102, then, the filtered clean liquid enters the general pipe 103 from the liquid outlet 2020101 of the transmission pipe 20201, namely, the filtered dirty liquid enters the clean liquid pipe 203 through the first general branch 10301 and the second general branch 10302, and finally, the filtered clean liquid is discharged out of the corresponding device.

When the back flushing is performed, firstly, the back flushing air inlet valve 304, the first general branch valve 10303 and the second general branch valve 10304 are opened, and the feeding valve 20102, the first slurry coating valve 105, the second slurry coating valve 106, the residual liquid discharge control valve 20209 and the clear liquid discharge valve 20302 are closed. Then, the gas in the gas source 4 firstly enters the blowback gas inlet pipe 301, then enters the first general branch 10301 and the second general branch 10302 of the general pipe 103 from the blowback gas inlet pipe, finally enters the filter tank 202 from the delivery pipe 20201, then carries out slag discharge, the gas in the delivery pipe 20201 dries the impurities on the filter bag 20206 by blowing, the dropped residues are discharged from the slag discharge port 202010, the waste liquid which is not dried by blowing enters the second slurry hanging passage 104 from the residual liquid discharge pipe 20208 through the residual liquid discharge port 20207, finally returns to the slurry hanging tank 101, and the gas in the guide pipe 20205 is discharged from the exhaust control port 303.

When filtration is needed, firstly, filter cloth is fixed in the filter cloth fixing groove 202050301 and the filter cloth fixing ring 202050302 in the clear liquid outlet pipe 2020503 in the flow guide pipe, then the flow guide pipe is placed in a filter element of the filter tank, and the end face of the axial front end of the clear liquid outlet pipe 2020503 of the flow guide pipe is connected with a corresponding element in the filter tank. Then, dirty liquid to be filtered firstly passes through the filter cloth, a part of filter residues are filtered by the filter cloth, then the dirty liquid enters the outer pipe 2020501 through the filtering holes 2020506 on the outer pipe, clear liquid enters the clear liquid conveying pipe 2020504 from the port at the axial tail end of the clear liquid conveying pipe 2020504, then enters the clear liquid output pipe 2020503, and finally enters the next treatment link, and then residues deposited at the bottom of the outer pipe 2020501 are removed through the detachable blocking plate 2020507 when the filtering is finished.

Claims (13)

1. A filtering device integrating slurry hanging, filtering and back flushing comprises a slurry hanging unit (1), a filtering unit (2) and a back flushing unit (3);

the slurry hanging unit (1) comprises a slurry hanging groove (101), a first slurry hanging passage (102) and a second slurry hanging passage (104); the filtering unit (2) comprises a feeding pipeline (201), a filtering tank (202) and a liquid-liquid feeding pipe (203); the back flushing unit (3) comprises a back flushing air inlet pipe (301) and an exhaust pipe (302);

it is characterized in that the preparation method is characterized in that,

the slurry hanging unit (1) further comprises a general pipe (103), one end of the general pipe (103) is connected with a liquid outlet (2020101) arranged at the end part of a transmission pipe (20201) extending out of the filter tank (202), and the other end of the general pipe (103) is connected with one end of a second slurry hanging passage (104), one end of a blowback air inlet pipe (301) and one end of a clear liquid pipe (203);

the general pipe is divided into a first general branch (10301) and a second general branch (10302) which are parallel; a first general branch valve (10303) is arranged on the first general branch (10301), and a second general branch valve (10304) is arranged on the second general branch (10302);

a first slurry coating valve (105) is arranged on the first slurry coating passage (102); the second slurry coating passage (104) is provided with a second slurry coating valve (106); a feeding valve (20102) is arranged on the feeding pipeline (201), and a liquid outlet valve (20302) is arranged on the liquid inlet pipe (203); and a back-blowing air inlet valve (304) is arranged on the back-blowing air inlet pipe (301).

2. The integrated slurry coating, filtering and back blowing filtering device as claimed in claim 1, wherein one end of the first slurry coating passage (102) is connected with a slurry coating discharge port (10101) arranged at the upper bottom of the slurry coating groove (101), and the other end of the first slurry coating passage (102) is connected with the filtering unit (2); the other end of the second slurry coating passage (104) is connected with a circular slurry coating feed back port (10102) arranged at the top of the slurry coating groove (101);

one end of the feeding pipeline (201) is provided with a dirty liquid inlet (20101) to be filtered, and the other end of the feeding pipeline (201) is communicated with the first slurry coating passage (102); a conveying pipe (20201) is arranged in the filter tank (202), one end of the conveying pipe (20201) is closed, the other end of the conveying pipe extends out of the filter tank (202), and a liquid outlet (2020101) is arranged at the end part of the conveying pipe (20201) extending out of the filter tank (202); the other end of the clear liquid pipe (203) is provided with a clear liquid outlet (20301);

the other end of the back-blowing air inlet pipe (301) is connected with an air source (4); one end of the exhaust pipe (302) is connected with an exhaust port (20202) formed in the top of the filter tank (202); the other end of the exhaust pipe (302) is provided with an exhaust control port (303).

3. The integrated slurry, filter and blowback filter apparatus of claim 1, wherein said first slurry path (102) is connected to said filter unit (2) through a feed port (20204) formed in a side wall of said filter tank (202) near a bottom thereof.

4. The integrated slurry-coating, filtering and blowback filtering device according to claim 1, wherein an air inlet (20203) is provided on the side wall of the filtering tank (202) in a direction opposite to the liquid outlet (2020101), the air inlet (20203) is connected with a first air inlet pipe (5), and the other end of the first air inlet pipe (5) is connected with an air source (4).

5. The integrated slurry-coating, filtering and back-blowing filter device as claimed in claim 1, wherein a plurality of liquid inlets (2020102) are provided on the side wall of the transfer pipe (20201) in the filter tank (202), and a plurality of liquid guide pipes (20205) are correspondingly and fixedly connected to the plurality of liquid inlets (2020102).

6. The integrated filter device of slurry hanging, filtering and back blowing as claimed in claim 5, wherein the outside of the plurality of draft tubes (20205) is provided with a filter bag (20206).

7. The integrated slurry coating, filtering and back blowing filter device as claimed in claim 1, wherein a residual liquid drain port (20207) is arranged on the tapered side wall of the filter tank (202) near the bottom, the residual liquid drain port (20207) is connected with a residual liquid drain pipe (20208), and the other end of the residual liquid drain pipe (20208) is communicated with the second slurry coating passage (104).

8. The integrated slurry, filtration and blowback filtration apparatus of claim 7, wherein said raffinate drainpipe (20208) is provided with a raffinate draincontrol valve (20209).

9. The integrated slurry, filtering and blowback filtering device of claim 1, wherein a slag discharge port (202010) is provided at the bottom of said filter tank (202).

10. The integrated filter device of slurry hanging, filtering and back blowing of claim 5, characterized in that the guide pipe (20205) comprises an outer pipe (2020501), the axial front end of the outer pipe (2020501) is provided with a clear liquid outlet pipe (2020503), and the axial tail end of the outer pipe (2020501) is provided with a blocking plate (2020507); the outer pipe (2020501) is provided with a plurality of filtering holes (2020506);

a clear liquid conveying pipe (2020504) with the outer diameter smaller than the inner diameter of the outer pipe (2020501) is coaxially arranged inside the outer pipe (2020501), and a gap is formed between the outer pipe (2020501) and the clear liquid conveying pipe (2020504); the axial front end of the clear liquid transmission pipe (2020504) extends into the clear liquid output pipe (2020503); the clear liquid flowing into the filtering holes on the outer pipe (2020501) enters the clear liquid conveying pipe from the axial tail end of the clear liquid conveying pipe;

the outer pipe (2020501), the clear liquid output pipe (2020503) and the clear liquid transmission pipe (2020504) are connected through a special-shaped connecting ring (2020502);

the outer wall of the clear liquid output pipe (2020503) is provided with a filter cloth fixing groove (202050301), and a filter cloth fixing ring (202050302) matched with the filter cloth fixing groove (202050301) is arranged in the filter cloth fixing groove (202050301).

11. The integrated battering, filtering and blowback filter device of claim 10, wherein said shaped connector ring (2020502) has an outer wall comprising a first face (202050201), a second face (202050202) and a third face (202050203) distributed in an axial direction, and a fourth face (202050204) and a fifth face (202050205) distributed in a radial direction;

the third surface (202050203) of the outer wall of the special-shaped connecting ring (2020502) is fixedly connected with the inner wall of the outer pipe (2020501), and the fifth surface (202050205) of the outer wall of the special-shaped connecting ring (2020502) is fixedly connected with the end surface of the axial front end of the outer pipe (2020501); the first surface (202050201) of the outer wall of the special-shaped connecting ring (2020502) is connected with the inner wall of the clear liquid output pipe (2020503), and the fourth surface (202050204) of the outer wall of the special-shaped connecting ring (2020502) is in contact with the end surface of the axial tail end of the clear liquid output pipe (2020503); the second surface (202050202) of the outer wall of the special-shaped connecting ring (2020502) is flush with the outer wall of the clear liquid output pipe (2020503) and the outer wall of the outer pipe (2020501);

the inner wall of the special-shaped connecting ring (2020502) is fixedly connected with the outer wall of the clear liquid conveying pipe (2020504).

12. The integrated slurry, filter and blow-back filter apparatus of claim 10, wherein the first side (202050201) of the outer wall of the shaped connector ring (2020502) is connected to the inner wall of the clear liquid outlet tube (2020503) by a screw thread (2020505).

13. The integrated filter device of slurry hanging, filtering and back blowing as claimed in claim 10, wherein the clear liquid in the outer pipe (2020501) enters the clear liquid transfer pipe (2020504) in two ways, one way is that the axial rear end of the clear liquid transfer pipe (2020504) is not contacted with the blocking plate (2020507) arranged at the axial end of the outer pipe (2020501); the other is that the rear end of the clear liquid conveying pipe (2020504) is contacted with a blocking plate (2020507) arranged at the axial tail end of the outer pipe (2020501), but a liquid inlet ring groove (2020508) is arranged at the position close to the blocking plate (2020507).

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