CN215409039U

CN215409039U - Bidirectional flow filtration thickening device with stirring function

Info

Publication number: CN215409039U
Application number: CN202121347963.0U
Authority: CN
Inventors: 单欧朋; 徐杰祥; 张玲
Original assignee: Zhejiang Qingtian Oupeng Machinery Manufacturing Co ltd
Current assignee: Zhejiang Qingtian Oupeng Machinery Manufacturing Co ltd
Priority date: 2021-06-17
Filing date: 2021-06-17
Publication date: 2022-01-04
Anticipated expiration: 2031-06-17

Abstract

The utility model provides a stirring bidirectional flow filtering thickening device, which comprises a cylinder, wherein the upper part of the cylinder is connected with an upper cover, the bottom of the cylinder is connected with a base, the upper cover is sequentially provided with a feed valve, a safety valve and an emptying valve, the base is provided with a regenerated liquid inlet and a thick slurry outlet valve, and a filter element is arranged in the cylinder; the concentration component can realize the online back flushing regeneration operation of the filter element, does not need to discharge thick slurry first, greatly concentrates the slurry, achieves the purpose of thickening, and avoids the defect that the traditional filter can not back flush and filter simultaneously; a circulating component is arranged between the dense slurry circulating valve and the dense slurry outlet valve, and a stirring component is arranged on the cylinder body in a matching way; and then when filtering, stir and self-loopa to the thick liquids, overcome the thick liquids that the proportion is big, easily deposit and block up the problem of pipeline.

Description

Bidirectional flow filtration thickening device with stirring function

Technical Field

The utility model belongs to the technical field of candle filters, and particularly relates to a bidirectional flow filtration thickening device with stirring.

Background

The candle filter has wide application in the filtration and separation industry, particularly has a great deal of use experience in the aspects of medicine, metallurgy, chemical industry, water treatment and the like, and has the advantages of high filtration precision, large flux and the like. However, in the metallurgical aspect, particularly for the slurry with high bulk density and high self-specific gravity, the easy-to-agglomerate slurry (such as cobalt hydroxide) has the problems that the slurry is deposited on the bottom head of the equipment, agglomerates and blocks pipelines. Meanwhile, due to the fact that the traditional filtering mode has the condition that the concentration of the slurry is insufficient in one-time filtering concentration, secondary filter pressing concentration and manual filter cake removal are needed for thick slurry, the labor intensity is increased, and the production efficiency is influenced; and the filter cake manually removed has magnetic pollution, so that the product is scrapped or degraded for use.

SUMMERY OF THE UTILITY MODEL

The utility model provides a bidirectional flow filtering thickening device with stirring, and aims to solve the problems in the prior art.

The technical scheme adopted by the utility model for solving the technical problems is as follows: a bidirectional flow filtering thickening device with stirring comprises a cylinder body, wherein the upper part of the cylinder body is connected with an upper cover, the bottom of the cylinder body is connected with a base, the upper cover is sequentially provided with a feed valve, a safety valve and an air release valve, one end of the feed valve is connected with a pump outlet valve, one end of the pump outlet valve is connected with a variable frequency slurry pump, the variable frequency slurry pump is connected to a raw slurry tank, the base is provided with a regenerated liquid inlet and a concentrated slurry outlet valve, a filter element is arranged inside the cylinder body, the top end and the bottom of the filter element are respectively connected with a first discharge pipe and a second discharge pipe, and a concentration assembly is arranged between the first discharge pipe and the second discharge pipe; a thick slurry circulating valve is arranged on the side wall of one end of the upper part of the cylinder body, and a circulating component is arranged between the thick slurry circulating valve and the thick slurry outlet valve; the cylinder body is provided with a stirring component in a matching way; the upper cover is provided with a positive blowing assembly; and the regeneration liquid inlet is connected with a backflow component.

Preferably, one end of the first calandria and one end of the second calandria extend to the outside of the cylinder respectively, the concentration assembly comprises a first connecting pipe connected to one end of the first calandria extending to the outside of the cylinder, a second communicating pipe and a first grouping valve are sequentially connected to the first connecting pipe, a backwashing valve and a back-flushing valve are sequentially connected to the second communicating pipe, and a back-flushing pressure transmitter is connected to the back-flushing valve; the utility model discloses a filter tube, including barrel, second calandria, first branch group valve, fourth branch group valve, filter liquid return valve, go out clear liquid electric control valve and play regeneration liquid valve, the second calandria extends to the outside one of barrel and serves and is connected with second branch group valve, be connected with third communicating pipe on the first branch group valve, the one end of third communicating pipe has connected gradually fourth communicating pipe and four-way pipe, fourth communicating pipe and first branch group valve intercommunication, be connected with filtrating return valve, play clear liquid electric control valve and play regeneration liquid valve on the four-way pipe respectively, be connected with first pipeline visual cup on the filtrating return valve, it is connected with second pipeline visual cup on the clear liquid electric control valve to go out, the end-to-end connection of second pipeline visual cup has the flowmeter.

Preferably, the circulation component comprises a thick slurry circulation valve, a discharge three-way valve is connected to the thick slurry circulation valve, a first diaphragm pump is connected to the discharge three-way valve, the first diaphragm pump is communicated with a thick slurry outlet valve, and the other end of the discharge three-way valve is connected to the aging kettle.

Preferably, the stirring subassembly is including setting up in the speed reducer of the area variable frequency speed regulation of upper cover, the output that the speed reducer of taking variable frequency speed regulation motor extends to the barrel inside is connected with the dwang, so the end-to-end connection of dwang has the stirring rake.

Preferably, the positive blowing assembly comprises a lifting check valve arranged on the upper cover, the lifting check valve is connected with a positive blowing valve, and the positive blowing valve is connected with a positive blowing pressure transmitter.

Preferably, the backflow assembly comprises a regeneration three-way valve arranged on the regeneration liquid inlet, the regeneration three-way valve is connected with a second diaphragm pump and a first regeneration tank, and the second diaphragm pump is connected with a second regeneration tank.

Preferably, the upper cover is connected with a cylinder pressure transmitter, a capacitance type liquid level meter and a spraying cleaning valve, and one end of the spraying cleaning valve extending into the upper cover is connected with a spraying pipe.

Preferably, the side wall of one end of the cylinder body is connected with a first glass sight glass and a second glass sight glass, and the first glass sight glass and the second glass sight glass respectively correspond to the top and the bottom of the filter element.

The utility model has the beneficial effects that: the filter elements are arranged in the cylinder in a modular way according to concentric circles, the upper part and the lower part of each filter element are provided with through holes, the upper through hole and the lower through hole are connected with a movable joint through threads, the movable joint is connected with an upper discharge pipe and a lower discharge pipe, the discharge pipes are arranged in a modular way and fixed on the inner wall of the cylinder, the discharge pipes are connected with branch pipes, the branch pipes are connected with filtrate outlets of a first grouping valve and a second grouping valve, the filtered liquid on each group of modules can flow out in two directions through the first discharge pipe and the second discharge pipe, the filter elements with a two-way flow structure greatly reduce the outflow resistance of the filtered filtrate, and increase the filtration pressure difference, thereby increasing the flow, and simultaneously, the structure that the filter element discharges liquid up and down simultaneously can lead the filter element to carry out secondary positive pressure filtration, further concentrate slurry, avoid cleaning water to clean the equipment, the concentration of the slurry is diluted, and the cleaning water does not need to be discharged independently, so that the wastewater treatment process is reduced, the production cost is reduced, and the economic benefit is improved; the concentration assembly is connected between the first discharge pipe and the second discharge pipe, online back flushing regeneration operation of the filter element can be realized through the concentration assembly, thick slurry does not need to be discharged first, the slurry is greatly concentrated, the thickening purpose is achieved, and the defect that a traditional filter cannot back flush and filter simultaneously is overcome; a circulating component is arranged between the dense slurry circulating valve and the dense slurry outlet valve, and a stirring component is arranged on the cylinder body in a matching way; and then when filtering, stir and self-loopa to the thick liquids, overcome the thick liquids that the proportion is big, easily deposit and block up the problem of pipeline.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a filter element according to the present invention;

FIG. 3 is a cross-sectional view of a filter cartridge according to the present invention;

FIG. 4 is a schematic view of a process flow of the present invention;

in the figure: 1-cylinder, 2-upper cover, 3-base, 4-spray cleaning valve, 5-feed valve, 6-safety valve, 7-regenerated liquid inlet, 8-thick slurry outlet valve, 9-filter element, 10-first calandria, 11-second calandria, 12-concentration component, 121-first connecting pipe, 122-second communicating pipe, 123-first grouping valve, 124-backwashing valve, 125-blowback valve, 126-blowback pressure transmitter, 127-second grouping valve, 128-third communicating pipe, 1291-fourth communicating pipe, 1292-fourth communicating pipe, 1293-filtrate reflux valve, 1294-discharged clear liquid electric regulating valve, 1295-discharged regenerated liquid valve, 1296-first pipeline visual cup, 1297-second pipeline visual cup, 1298-flowmeter, 1298-discharge cup, 1296-first pipeline visual cup, 1297-second pipeline visual cup, 1298-flowmeter, 13-thick slurry circulating valve, 14-circulating component, 141-discharging three-way valve, 142-first diaphragm pump, 15-stirring component, 151-speed reducer with variable frequency speed regulating motor, 152-rotating rod, 153-stirring paddle, 16-forward blowing component, 161-lifting check valve, 162-forward blowing valve, 163-forward blowing pressure transmitter, 17-backflow component, 171-regeneration three-way valve, 172-second diaphragm pump, 173-first regeneration tank, 174-second regeneration tank, 18-cylinder pressure transmitter, 19-first glass sight glass, 20-second glass sight glass, 21 capacitance type liquid level meter, 22-emptying valve, 23-spray pipe, 24-pump outlet valve and 25-variable frequency slag slurry pump.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.

Referring to fig. 1-3, the present invention provides a technical solution of a bi-directional flow filtration thickener with stirring: a bidirectional flow filtration thickening device with stirring. The utility model relates to a stirring bidirectional flow filtering thickening device, which comprises a cylinder body 1, wherein the upper part of the cylinder body 1 is connected with an upper cover 2, the bottom of the cylinder body 1 is connected with a base 3, the upper cover 2 is sequentially provided with a feed valve 5, a safety valve 6 and an air release valve 22, one end of the feed valve 5 is connected with a pump outlet valve 24, one end of the pump outlet valve 24 is connected with a variable-frequency slurry pump 25, the variable-frequency slurry pump 25 is connected to an original slurry tank, the base 3 is provided with a regenerated liquid inlet 7 and a thick slurry outlet valve 8, a filter element 9 is arranged in the cylinder body 1, the top end and the bottom of the filter element 9 are respectively connected with a first discharge pipe 10 and a second discharge pipe 11, and a concentration assembly 12 is arranged between the first discharge pipe 10 and the second discharge pipe 11; a dense slurry circulating valve 13 is arranged on the side wall of one end of the upper part of the cylinder body 1, and a circulating component 14 is arranged between the dense slurry circulating valve 13 and the dense slurry outlet valve 8; the barrel body 1 is provided with a stirring component 15 in a matching way; the upper cover 2 is provided with a positive blowing component 16; the regeneration liquid inlet 7 is connected with a backflow component 17.

In the embodiment, the filter element 9 is arranged in the cylinder 1 in a modular arrangement according to concentric circles, the first and second calandria are respectively connected with the upper and lower interfaces of the filter element 9, the upper and lower parts of the filter element 9 are through holes, the upper and lower through holes are connected with a union through a thread, the union is connected with an upper and a lower discharge pipes which are arranged in a modular way and fixed on the inner wall of the cylinder, the calandria is connected with a branch pipe which is connected with an upper and a lower groups of filtrate outlets, the filtered liquid on each group of modules can flow out in two directions through the first and second calandria, the filter element 9 with a two-way flow structure greatly reduces the filtered filtrate outflow resistance, increases the filtering pressure difference, thereby increasing the flow rate, and simultaneously the structure that the upper and the lower parts of the filter element 9 discharge simultaneously can perform secondary positive pressure filtering to further concentrate the pulp, thereby avoiding dilution of the pulp concentration when cleaning water is used for cleaning the equipment and avoiding independent discharge of the cleaning water, the waste water treatment process is reduced, the production cost is reduced, and the economic benefit is improved; a concentration component 12 is connected between the first discharge pipe 10 and the second discharge pipe 11, online back flushing regeneration operation of the filter element 9 can be realized through the concentration component 12, thick slurry does not need to be discharged first, slurry is greatly concentrated, the purpose of thickening is achieved, and the defect that a traditional filter cannot filter while back flushing is realized is overcome; a circulating component 14 is arranged between the dense slurry circulating valve 13 and the dense slurry outlet valve 8, and a stirring component 15 is arranged on the cylinder body 1 in a matching way; and then when filtering, stir and self-loopa to the thick liquids, overcome the thick liquids that the proportion is big, easily deposit and block up the problem of pipeline.

In this embodiment, one end of the first discharge pipe 10 and one end of the second discharge pipe 11 extend to the outside of the cylinder 1, one end of the first discharge pipe 10 extending to the outside of the cylinder 1 is connected to a first connection pipe 121, the first connection pipe 121 is sequentially connected to a second connection pipe 122 and a first grouping valve 123, the second connection pipe 122 is sequentially connected to a backwash valve 124 and a blowback valve 125, and the end of the blowback valve 125 is connected to a blowback pressure transmitter 126; one end of the second calandria 11 extending to the outside of the cylinder 1 is connected with a second grouping valve 127, the first grouping valve 123 is connected with a third communicating pipe 128, one end of the third communicating pipe 128 is sequentially connected with a fourth communicating pipe 1291 and a fourth communicating pipe 1292, the fourth communicating pipe 1291 is communicated with the first grouping valve 123, the remaining three ports of the fourth communicating pipe 1292 are respectively connected with a filtrate return valve 1293, a clear liquid outlet electric regulating valve 1294 and a regenerated liquid outlet valve 1295, the filtrate return valve 1293 is connected with a first pipeline viewing cup 1296, the clear liquid outlet electric regulating valve 1294 is connected with a second pipeline viewing cup 1297, and the tail end of the second pipeline viewing cup 1297 is connected with a flow meter 1298, so that online back flushing regeneration operation of the filter core is realized, thick slurry does not need to be discharged first, the slurry is greatly concentrated, the purpose of thickening is achieved, and the defect that the traditional filter cannot be back flushed while filtering is avoided.

In this embodiment, the circulation component 14 includes that the thick slurry circulation valve 13 is connected with the discharging three-way valve 141, the discharging three-way valve 141 is connected with the first diaphragm pump 142, the first diaphragm pump 142 is communicated with the thick slurry outlet valve 8, and the other end of the discharging three-way valve 141 is connected to the aging kettle, so that the slurry in the cylinder 1 can be subjected to self-circulation, and the problem that the slurry with high specific gravity and easy precipitation blocks the pipeline is solved.

In this embodiment, the stirring assembly 15 includes the speed reducer 151 with the variable frequency speed regulation motor arranged on the upper cover 2, the speed reducer 151 with the variable frequency speed regulation motor is provided with the variable frequency speed regulation motor, the output end of the speed reducer 151 with the variable frequency speed regulation motor extending to the inside of the cylinder 1 is connected with the rotating rod 152, so the end of the rotating rod 152 is connected with the stirring paddle 153, the speed reducer 151 with the variable frequency speed regulation motor drives the rotating rod 152 and the stirring paddle 153 to rotate, and then the slurry in the cylinder 1 is stirred, thereby avoiding the slurry from precipitating, and causing the problem of pipeline blockage.

In the present embodiment, the forward blowing assembly 16 includes an up-down check valve 161 disposed on the upper cover 2, a forward blowing valve 162 is connected to the up-down check valve 161, and a forward blowing pressure transmitter 163 is connected to the forward blowing valve 162; when the filtering is carried out, when the whole tank body is not filled with liquid, the interior of the tank body is in a non-pressure state, and air is blown in through positive blowing to increase the pressure in the tank body, so that pressure difference is generated between the inside and the outside of the filter element, and the pressure difference filtering is realized.

In the present embodiment, the backflow unit 17 includes a regeneration three-way valve 171 provided at the regeneration liquid inlet 7, a second diaphragm pump 172 and a first regeneration tank 173 are connected to the regeneration three-way valve 171, and a second regeneration tank 174 is connected to the second diaphragm pump 172, thereby performing a regeneration liquid backflow function.

Further, a cylinder pressure transmitter 18, a capacitance type liquid level meter 21 and a spraying cleaning valve 4 are connected to the upper cover 2, and a spraying pipe 23 is connected to one end of the spraying cleaning valve 4 extending to the inner part of the upper cover.

In this embodiment, the cylinder pressure transmitter 18 and the capacitance level meter 21 can transmit monitored data in real time, and then remote monitoring can be performed, and the inside of the cylinder 1 and the filter element can be cleaned through the spray pipe 23.

In this embodiment, be connected with first glass sight glass 19 and second glass sight glass 20 on the one end lateral wall of barrel 1, first glass sight glass 19 and second glass sight glass 20 correspond the top and the bottom of filter core 9 respectively, can observe whether the liquid level height coincide with liquid level meter measurement data in barrel 1 through the glass sight glass, can adjust when data do not coincide and measure the mistake, can observe simultaneously whether firm stable at the filter core junction.

The utility model relates to a control method of a stirring bidirectional flow filtering thickening device, which comprises the following steps:

(1) starting an automatic control system;

(2) opening an emptying valve to prepare for exhausting air in the equipment;

(3) starting a stirring paddle;

(4) opening a dense slurry outlet valve, connecting a discharge three-way valve with a dense slurry circulating valve, opening the dense slurry circulating valve, and connecting an autologous circulating pipeline;

(5) opening a feed valve;

(6) starting a variable-frequency slurry pump and a first diaphragm pump, and starting feeding and self-circulation;

(7) the capacitance type liquid level meter monitors the liquid level height, and the emptying valve is closed immediately when the liquid level reaches the preset height; the capacitance type liquid level meter monitors the height in real time, and is linked with the variable frequency slurry pump to maintain the liquid level height and operate without exceeding the preset height;

(8) opening the upper first grouping valve and the second grouping valve;

(9) opening a positive blowing valve, increasing the gas pressure in the cylinder and maintaining a positive pressure environment;

(10) opening the clear liquid outlet electric regulating valve, monitoring the flow meter, adjusting the opening of the clear liquid outlet electric regulating valve, stabilizing the flow and meeting the setting requirement;

(11) closing the positive blowing valve, the first grouping valve and the second lower grouping valve at regular time;

(12) opening an emptying valve;

(13) opening a back-flushing valve, and immediately closing the valve when the valve is in place;

(14) monitoring the pressure in the cylinder, and closing the emptying valve when the pressure is reduced to a preset pressure;

(15) repeating the steps 8-14 regularly, wherein each group of filter element modules sequentially performs filtering, back flushing regeneration and filtering, so that a continuous filtering and back flushing function is realized, and the concentration amplitude of the slurry is greatly increased; carrying out back flushing regeneration operation on each group of modules, wherein the purpose of back flushing regeneration is to blow off filter cakes attached to the filter element, further dredging capillary pores of the filter element and recovering the filtering capacity; the filtering time of each group of filter elements is limited, and back flushing regeneration must be carried out repeatedly within a certain interval, and the principle of back flushing is as follows: the gas-liquid mixing function is realized, a closed environment is formed on the inner wall of the filter element by using the tension of water, and then the high pressure of gas is favorable for performing instant blasting type action on the closed environment, so that a filter cake falls off, and the filtering capacity of the filter element is recovered;

(16) monitoring the accumulated flow, and stopping filtering after meeting the preset flow;

(17) closing the first grouping valve;

(18) closing the variable-frequency slurry pump and the feed valve, monitoring the liquid level height, and performing secondary positive pressure thickening concentration on the thick slurry;

(19) when the liquid level height is reduced to a preset value, the positive blowing valve, the clear liquid outlet electric regulating valve and the second grouping valve are closed;

(20) opening an emptying valve and a discharging three-way valve to connect an aging kettle pipeline, closing a thick slurry circulating valve, and starting pumping and discharging thick slurry; the pipeline of the aging kettle comprises: three ports of the discharging three-way valve are respectively connected with a dense slurry circulating valve, a first diaphragm pump and an aging kettle (a reaction container); during normal filtration, self-circulation is carried out, and after the filtration is finished, the three-way valve is cut to the aging kettle, and slurry is conveyed to the aging kettle through the first diaphragm pump.

(21) After the preset time is reached, the backwashing valve is opened, and after the preset time is maintained, the backwashing valve is closed, the back flushing valve is opened, and the valve is closed when the valve acts in place; carrying out backwashing and back-blowing operation on each group of filter element modules in sequence, cleaning the filter elements and waiting for next use;

(22) opening a spray cleaning valve, cleaning the interior of the equipment, and closing the spray cleaning valve after the preset time is reached;

(23) monitoring the liquid level in the cylinder, and closing the first diaphragm pump, closing the thick slurry outlet valve and the discharging three-way valve according to the preset requirement, and switching back to the circulating pipeline;

(24) and (5) closing the stirring paddle and the emptying valve to finish thickening of the filtrate.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a two-way flow of area stirring filters thickening device, includes barrel (1), the upper portion of barrel (1) is connected with upper cover (2), the bottom of barrel (1) is connected with base (3), set gradually on upper cover (2) and set up feed valve (5), relief valve (6) and atmospheric valve (22), the one end of feed valve (5) is connected with pump outlet valve (24), the one end of pump outlet valve (24) is connected with frequency conversion sediment stuff pump (25), frequency conversion sediment stuff pump (25) are connected to former thick liquid jar, be provided with regeneration liquid import (7) and thick liquid outlet valve (8) on base (3), its characterized in that: a filter element (9) is arranged in the cylinder body (1), the top end and the bottom of the filter element (9) are respectively connected with a first calandria (10) and a second calandria (11), and a concentration assembly (12) is arranged between the first calandria (10) and the second calandria (11); a thick slurry circulating valve (13) is arranged on the side wall of one end of the upper part of the cylinder body (1), and a circulating component (14) is arranged between the thick slurry circulating valve (13) and the thick slurry outlet valve (8); the barrel body (1) is provided with a stirring component (15) in a matching way; a positive blowing component (16) is arranged on the upper cover (2); and the regeneration liquid inlet (7) is connected with a backflow component (17).

2. The bi-directional flow filtration thickener with agitation as set forth in claim 1, wherein: one end of each of the first calandria (10) and the second calandria (11) extends to the outside of the barrel (1) respectively, the concentration assembly (12) comprises a first connecting pipe (121) connected with one end of the first calandria (10) extending to the outside of the barrel (1), the first connecting pipe (121) is sequentially connected with a second communicating pipe (122) and a first grouping valve (123), the second communicating pipe (122) is sequentially connected with a backwashing valve (124) and a back flushing valve (125), and the back flushing valve (125) is connected with a back flushing pressure transmitter (126); one end, extending to the outside of the barrel body (1), of the second calandria (11) is connected with a second grouping valve (127), the first grouping valve (123) is connected with a third communicating pipe (128), one end of the third communicating pipe (128) is sequentially connected with a fourth communicating pipe (1291) and a fourth communicating pipe (1292), the fourth communicating pipe (1291) is communicated with the first grouping valve (123), the fourth communicating pipe (1292) is respectively connected with a filtrate return valve (1293), a clear liquid outlet electric regulating valve (1294) and a regenerated liquid outlet valve (1295), the filtrate return valve (1293) is connected with a first pipeline viewing cup (1296), the clear liquid outlet electric regulating valve (1294) is connected with a second pipeline viewing cup (1297), and the tail end of the second pipeline viewing cup (1297) is connected with a flow meter (1298).

3. The bi-directional flow filtration thickener with agitation as set forth in claim 1, wherein: the circulation component (14) comprises a discharge three-way valve (141) connected to the thick slurry circulation valve (13), a first diaphragm pump (142) is connected to the discharge three-way valve (141), the first diaphragm pump (142) is communicated with the thick slurry outlet valve (8), and the other end of the discharge three-way valve (141) is connected to the aging kettle.

4. The bi-directional flow filtration thickener with agitation as set forth in claim 1, wherein: stirring subassembly (15) is including setting up in the speed reducer (151) of taking variable frequency speed regulating motor of upper cover (2), speed reducer (151) of taking variable frequency speed regulating motor extend to be connected with dwang (152) on barrel (1) inside output, so the end-to-end connection of dwang (152) has stirring rake (153).

5. The bi-directional flow filtration thickener with agitation as set forth in claim 1, wherein: the positive blowing assembly (16) comprises a lifting check valve (161) arranged on the upper cover (2), a positive blowing valve (162) is connected to the lifting check valve (161), and a positive blowing pressure transmitter (163) is connected to the positive blowing valve (162).

6. The bi-directional flow filtration thickener with agitation as set forth in claim 1, wherein: the backflow assembly (17) comprises a regeneration three-way valve (171) arranged on a regeneration liquid inlet (7), a second diaphragm pump (172) and a first regeneration tank (173) are connected to the regeneration three-way valve (171), and a second regeneration tank (174) is connected to the second diaphragm pump (172).

7. The bi-directional flow filtration thickener with agitation as set forth in claim 1, wherein: the upper cover (2) is connected with a cylinder pressure transmitter (18), a capacitance type liquid level meter (21) and a spraying cleaning valve (4), and one end of the spraying cleaning valve (4) extending to the inner part of the upper cover is connected with a spraying pipe (23).

8. The bi-directional flow filtration thickener with agitation as set forth in claim 1, wherein: the filter is characterized in that a first glass sight glass (19) and a second glass sight glass (20) are connected to the side wall of one end of the barrel (1), and the first glass sight glass (19) and the second glass sight glass (20) correspond to the top and the bottom of the filter element (9) respectively.