CN115920526B

CN115920526B - Diethyl toluene diamine filter device with circulating filtration function and application method

Info

Publication number: CN115920526B
Application number: CN202310238488.0A
Authority: CN
Inventors: 李强; 王晓刚; 朱忠杰; 李春花
Original assignee: Dongying Hairuibao New Material Co ltd
Current assignee: Dongying Hairuibao New Material Co ltd
Priority date: 2023-03-14
Filing date: 2023-03-14
Publication date: 2023-05-05
Anticipated expiration: 2043-03-14
Also published as: CN115920526A

Abstract

The invention discloses a diethyl toluenediamine filter device with a circulating filtering function and an application method thereof, and relates to the technical field of chemical equipment. Including first supporting shell, the downside rigid coupling of first supporting shell has the annular frame, the middle part sliding connection of annular frame has the slip cap, slip cap sliding connection has the sliding plate, sliding plate and first supporting shell sliding connection, first supporting shell rigid coupling has the second push rod of being connected with the control panel electricity, the flexible end of second push rod passes through installation pole and sliding plate rigid coupling, the lower part rigid coupling of second supporting shell has the fixed block, the downside of fixed block and the interior upside of first supporting shell are on same horizontal plane fixed block run-through and are connected with circumference equidistant communicating pipe. According to the invention, the diethyl toluenediamine is returned into the second support shell by pushing upwards through the sliding plate, and the filter shell carries out secondary filtration on the diethyl toluenediamine, so that the time for standing and precipitating the diethyl toluenediamine is saved; avoiding the pump from being corroded by the diethyl toluenediamine in the circulating process.

Description

Diethyl toluene diamine filter device with circulating filtration function and application method

Technical Field

The invention relates to the technical field of chemical equipment, in particular to a diethyl toluene diamine filter device with a circulating filtration function and an application method thereof.

Background

The diethyl toluenediamine refers to a mixture of two diethyl toluenediamine isomers, the diethyl toluenediamine can improve the hydrolysis resistance of a product, meanwhile, the diethyl toluenediamine can be darkened after being contacted with air, the diethyl toluenediamine has strong corrosiveness, excessive aromatic amine catalyst can be added in the preparation of the diethyl toluenediamine, partial aromatic amine catalyst can be remained in the diethyl toluenediamine after the preparation is finished, the residual aromatic amine catalyst can influence the purity of the diethyl toluenediamine, and quantitative hydrochloric acid is generally added to precipitate the aromatic amine catalyst in a precipitation form.

When filtering the impurity in the diethyl toluenediamine, make diethyl toluenediamine circulate in the reation kettle through the drawing liquid pump, through the filter screen on the diethyl toluenediamine circulation flow path, the precipitate in the diethyl toluenediamine carries out the circulation filtration, but the drawing liquid pump can suffer the corruption of diethyl toluenediamine, reduce the life of drawing liquid pump, and in the in-process of diethyl toluenediamine circulation flow, if the filtered precipitate can not in time discharge, can make the precipitate receive the impact of diethyl toluenediamine, lead to the precipitate to redissolve, influence the removal efficiency of aromatic amine catalyst.

Disclosure of Invention

In order to overcome the defects in the background art, the invention provides a diethyl toluenediamine filter device with a circulating filtering function and an application method.

The technical scheme provided by the invention is as follows: the diethyl toluenediamine filter device with the circulating filtering function comprises a support frame, wherein the support frame is fixedly connected with a first support shell, the upper part of the first support shell is fixedly connected with a second support shell, the first support shell is communicated with the second support shell, the second support shell is fixedly connected with a top cover, the top cover is communicated with a liquid inlet pipe, the support frame is fixedly connected with a control panel, the lower side of the first support shell is fixedly connected with an annular frame, the middle part of the annular frame is in sliding connection with a sliding sleeve, the annular frame is fixedly connected with a first push rod electrically connected with the control panel, the telescopic end of the first push rod is fixedly connected with the sliding sleeve, the sliding sleeve is in sliding connection with a sliding plate, the sliding plate is in sliding connection with the first support shell, the sliding plate is in sealing fit with the sliding sleeve and the first support shell, the sliding plate is communicated with a liquid discharge pipe, the liquid discharge pipe of the sliding plate is provided with an electromagnetic valve which is electrically connected with the control panel, the first supporting shell is fixedly connected with a second push rod which is electrically connected with the control panel, the telescopic end of the second push rod is fixedly connected with the sliding plate through a mounting rod, the lower part of the second supporting shell is fixedly connected with a fixed block, the lower side surface of the fixed block and the inner upper side surface of the first supporting shell are on the same horizontal plane, the upper side surface of the fixed block is recessed downwards, the fixed block is connected with a communicating pipe with the same circumferential distance in a penetrating way, one-way valves are arranged in the communicating pipe, the middle part of the fixed block is provided with a precipitation filtering mechanism for filtering precipitation impurities, the precipitation filtering mechanism is used for filtering the precipitation impurities in the solution, and the sliding plate pushes the filtered solution into the second supporting shell for secondary filtration;

The sedimentation filtering mechanism comprises a fixing shell, the fixing shell is fixedly connected to the middle of a fixing block, the fixing shell is provided with first through holes which are equidistant in the circumferential direction, the first through holes are located on the upper side of the fixing block, the fixing shell is provided with second through holes which are equidistant in the circumferential direction, the second through holes are located on the lower side of the fixing block, the diameter of the first through holes in the fixing shell is smaller than that of the second through holes, a top cover is rotationally connected with a rotating shell, the lower end of the rotating shell is rotationally connected with the fixing shell in sealing fit, a filtering shell is slidably connected in the fixing shell, the lower portion of the filtering shell is provided with a filtering hole, the upper portion and the lower portion of the filtering shell are in sealing fit with the fixing shell, the fixing shell is slidably connected with a connecting rod, the top cover is fixedly connected with a third push rod which is electrically connected with a control panel through a mounting seat, the connecting rod is fixedly connected with the filtering shell, and a plugging assembly is arranged on the lower portion of the fixing shell and used for sealing the fixing shell.

As a preferable technical scheme of the invention, the plugging component comprises a first fixed plate, the first fixed plate is fixedly connected to the inner wall of the fixed shell, the first fixed plate is positioned at the lower side of the second through hole, the first fixed plate is connected with a sliding rod in a sliding manner, the upper end of the sliding rod is fixedly connected with a sealing plate, the upper side surface of the sealing plate is arranged in a frustum shape and is used for reducing the residue of solution on the sealing plate, the sliding rod is sleeved with a spring, two ends of the spring are fixedly connected with the first fixed plate and the sealing plate respectively, the inner wall of the fixed shell is fixedly connected with a sealing ring, the upper side surface of the sealing ring and the lower side surface of the second through hole are positioned at the same horizontal plane, and the sealing ring is in sealing fit with the sealing plate.

As a preferable technical scheme of the invention, the sediment filter mechanism is provided with a recoil mechanism for cleaning the filtered impurities, the recoil mechanism comprises an air injection valve, the air injection valve is communicated with the lower side of the rotating shell, the air injection valve is provided with a switch for pulling downwards, an elastic piece is arranged between the switch of the air injection valve and the rotating shell, the switch of the air injection valve is fixedly connected with a connecting ring, the lower side of the connecting ring is fixedly connected with a first connecting plate through a mounting column, and the upper part of the inner side surface of the filter shell is fixedly connected with a limiting ring.

As a preferable technical scheme of the invention, a stirring mechanism for accelerating material mixing is arranged in the second supporting shell, the stirring mechanism comprises a sealing cover, the sealing cover is rotationally connected to the upper end of the rotating shell, the sealing cover is communicated with an air inlet pipe, the air inlet pipe is communicated with an air pressurizing device electrically connected with the control panel, the upper part of the rotating shell is fixedly connected with a toothed ring, the upper side surface of the top cover is fixedly connected with a first driving motor electrically connected with the control panel through a mounting seat, an output shaft of the first driving motor is fixedly connected with a gear meshed with the toothed ring, the outer side surface of the rotating shell is fixedly connected with a stirring plate with equal circumferential spacing, and the stirring plate is provided with a telescopic cleaning assembly used for cleaning the stirring plate.

As a preferable technical scheme of the invention, the telescopic cleaning component comprises a telescopic plate, the telescopic plate is in sliding connection with the middle part of the stirring plate, the stirring plate is embedded with a fixed pipe, the fixed pipe is communicated with the rotating shell, one end of the fixed pipe, which is close to the rotating shell, is fixedly connected with a second connecting plate, the second connecting plate is provided with a vent hole, a piston rod is in sliding connection with the fixed pipe, one end of the piston rod, which is far away from the second connecting plate, penetrates through the fixed pipe and is in sealing fit with the fixed pipe, one end of the piston rod, which is far away from the second connecting plate, is fixedly connected with the telescopic plate through a mounting plate, a tension spring is fixedly connected between the second connecting plate and the piston rod, an n-shaped frame is fixedly connected with symmetrical scraping plates, and the scraping plates are in sliding fit with the stirring plate, and are used for cleaning impurities attached to the stirring plate.

As a preferable technical scheme of the invention, the invention further comprises a Z-shaped plate, wherein the Z-shaped plate is fixedly connected to the lower side of the rotating shell, the Z-shaped plate is in sliding fit with the upper side surfaces of the fixed shell and the fixed block, the lower part of the Z-shaped plate is made of elastic materials, and the Z-shaped plate is used for cleaning impurities attached to the fixed shell and the sealing plate.

As a preferable technical scheme of the invention, the cyclone separator further comprises circumferentially equidistant second fixing plates which are fixedly connected to the inner wall of the second support shell, and the second support shell is used for changing the cyclone direction of the solution.

As a preferred technical scheme of the invention, the automatic feeding and cleaning device further comprises a feeding and cleaning mechanism for uniformly adding materials, wherein the feeding and cleaning mechanism is arranged on the inner side of the second supporting shell and comprises a threaded rod, the threaded rod is rotationally connected to the top cover, the top cover is fixedly connected with a second driving motor through a mounting seat, an output shaft of the second driving motor is fixedly connected with the threaded rod, an annular plate is slidably connected with the inner wall of the second supporting shell and is slidably connected with the second fixing plate, the annular plate is in threaded connection with the threaded rod, an annular pipe is fixedly connected with the inner annular surface of the annular plate, the annular pipe is communicated with an equidistant liquid spraying head, the top cover penetrates through a multi-stage telescopic pipe, one end of the multi-stage telescopic pipe is communicated with the annular pipe, the other end of the annular pipe is communicated with a hydrochloric acid replenishing device communicated with the annular pipe, and the hydrochloric acid replenishing device communicated with the annular pipe is electrically connected with the control panel.

The filtering method using the diethyl toluenediamine filtering device with the circulating filtering function comprises the following specific steps:

s1: the staff presses a starting button of the control panel, the control panel starts a third push rod, the telescopic end of the third push rod drives the connecting rod to move downwards, the connecting rod drives the filter shell and other parts on the filter shell to move downwards through the mounting plate, and the filter shell seals the first through hole;

S2: the staff inputs quantitative diethyl toluenediamine into the second support shell through a liquid inlet pipe on the top cover, the control panel starts a second driving motor and a hydrochloric acid replenishing device, the annular plate moves downwards when the second driving motor rotates, and hydrochloric acid flows out from a liquid head sprayed by the annular pipe and is added into the diethyl toluenediamine at different heights;

s3: the control panel starts an air pressurizing device, the expansion plate moves outwards along the stirring plate, and simultaneously, the control panel starts a first driving motor, and the expansion plate and the stirring plate circumferentially rotate to stir the mixed solution of the diethyltoluenediamine and the hydrochloric acid;

s4: the control panel starts a third push rod, the telescopic end of the third push rod drives the filter shell to move upwards through the connecting rod, so that the filter hole of the filter shell is communicated with the first through hole, the diethyl toluenediamine flows into the fixed shell from the first through hole and flows out from the second through hole, and the filter shell filters sediment in the diethyl toluenediamine;

s5: the filter shell moves downwards to seal the first through hole, the sliding sleeve moves upwards to seal the second through hole, high-pressure air in the rotating shell is sprayed out through the air spraying valve, and sediment attached to the filter shell is backflushed;

s6: the diethyl toluenediamine flowing out of the second through hole flows into a cavity between the first support shell and the sliding plate, the sliding plate moves upwards to squeeze the diethyl toluenediamine, the diethyl toluenediamine flows into the second support shell again through the communicating pipe, the diethyl toluenediamine is filtered for the second time by the filtering shell, and the diethyl toluenediamine after the second filtering is discharged from the liquid outlet of the sliding plate;

S7: the control panel closes the air pressurizing device, rotates the shell internal pressure and reduces, and the expansion plate resets, rotates the shell simultaneously and drives Z shaped plate circumference rotation, and the attachment on the fixed block is cleared up to Z shaped plate, and annular plate moves down and clears up the second support shell inner wall, and then repeats step S5 and carries out recoil clearance to the filtration shell.

In summary, the beneficial effects of the invention are as follows:

1. the internal pressure of the rotating shell is continuously increased to enable the expansion plate to move outwards along the stirring plate, so that the contact area of the expansion plate and the stirring plate on the mixed solution of the diethyltoluenediamine and the hydrochloric acid is increased, and the mixing speed of the diethyltoluenediamine and the hydrochloric acid is improved.

2. The air that flows at a high speed carries out the recoil to the filtration pore of filtration shell, clears up the filtration shell through the air that flows at a high speed, avoids the filtration pore of filtration shell to be blocked by the precipitate, leads to the filtration efficiency of diethyl toluene diamine to reduce, and it is untimely to avoid the attached precipitate clearance of filtration shell simultaneously, causes the precipitate to dissolve again, leads to the treatment effect of this filter equipment residual catalyst machine in the diethyl toluene diamine to reduce.

3. The diethyl toluenediamine is returned to the second supporting shell by pushing upwards through the sliding plate, and the filter shell carries out secondary filtration on the diethyl toluenediamine, so that the time for standing and precipitating the diethyl toluenediamine is saved; avoiding the corrosion of diethyl toluenediamine to the liquid pump in the circulating process.

4. Under the pulling force effect of extension spring, the piston rod drives the expansion plate and other parts on it and resets, at the in-process that the expansion plate reset, and the stirring board clears up the attachment of expansion plate both sides face adhesion, and the expansion plate drives the scraper blade through n shape frame simultaneously and slides along the lateral surface of stirring board, and the scraper blade clears up the attachment of stirring board, avoids stirring board and expansion plate to remain a large amount of attachments, influences the filtration effect of follow-up paradiethyltoluenediamine.

5. Through downward movement of the annular plate, hydrochloric acid is added into the diethyl toluenediamine from different heights, the hydrochloric acid is uniformly dispersed into the diethyl toluenediamine, the diethyl toluenediamine and the hydrochloric acid are fully mixed, and the precipitation efficiency of the diethyl toluenediamine is improved; the attachment on the inner wall of the second support shell is cleaned through the annular plate, so that a large amount of attachment remained on the inner wall of the second support shell and the second fixing plate is avoided, the attachment on the inner wall of the second support shell is gradually thickened, and the subsequent diethyl toluenediamine treatment of the filtering device is affected.

Drawings

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

Fig. 2 is a schematic cross-sectional perspective view of a first support shell according to the present invention.

Fig. 3 is a schematic perspective view of the sediment filter according to the present invention.

FIG. 4 is a schematic perspective view of a sediment filter mechanism of the present invention in cross-section.

Fig. 5 is a schematic cross-sectional perspective view of a closure assembly of the present invention.

Fig. 6 is an enlarged perspective view of the present invention at a.

FIG. 7 is a schematic cross-sectional perspective view of the stirring mechanism of the present invention.

FIG. 8 is a schematic side perspective view of the agitator plate and expansion plate of the present invention.

Fig. 9 is an enlarged perspective view of the present invention at B.

FIG. 10 is a schematic perspective view of a cross-sectional view of a feed cleaning mechanism of the present invention.

Fig. 11 is a schematic cross-sectional perspective view of the annular plate ring tube of the present invention.

Marked in the figure as: 101-supporting frame, 102-first supporting shell, 103-second supporting shell, 104-top cover, 105-control panel, 106-ring frame, 107-sliding sleeve, 108-first push rod, 109-sliding plate, 110-second push rod, 111-fixed block, 112-communicating pipe, 201-fixed shell, 2001-first through hole, 2002-second through hole, 202-rotating shell, 203-filter shell, 204-connecting rod, 205-third push rod, 206-first fixed plate, 207-sliding rod, 208-sealing plate, 209-spring, 210-sealing ring, 301-air injection valve, 302-connecting ring, 303-first connecting plate, 304-limiting ring, 401-sealing cover, 402-air inlet pipe, 403-toothed ring, 404-first driving motor, 405-stirring plate, 406-telescopic plate, 407-fixed tube, 408-second connecting plate, 409-piston rod, 410-tension spring, 411-n-shaped frame, 412-scraper, 5-Z-plate, 6-second fixed plate, 701-threaded rod, 702-second driving motor, 703-annular plate, 705-telescopic tube.

Detailed Description

In the description of the present invention, it should be noted that the positional or positional relationship indicated by the terms such as "upper", "lower", "inner", "outer", "top/bottom", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. It will be understood by those skilled in the art that the specific meaning of the terms above in the present invention refers to the figures in a specific case.

Example 1

1-3, the diethyl toluenediamine filter device with the circulation filtering function comprises a supporting frame 101, wherein the supporting frame 101 is connected with a first supporting shell 102 through bolts, the upper part of the first supporting shell 102 is connected with a second supporting shell 103 through bolts, the first supporting shell 102 is communicated with the second supporting shell 103, the second supporting shell 103 is connected with a top cover 104 through bolts, the top cover 104 is communicated with a liquid inlet pipe, the supporting frame 101 is connected with a control panel 105 through bolts, an annular frame 106 is welded on the lower side of the first supporting shell 102, the middle part of the annular frame 106 is connected with a sliding sleeve 107 in a sliding manner, the annular frame 106 is connected with a first push rod 108 electrically connected with the control panel 105 through bolts, the telescopic end of the first push rod 108 is welded with the sliding sleeve 107, the sliding sleeve 107 is connected with a sliding plate 109 through bolts, the sliding plate 109 is connected with the first supporting shell 102 through sliding manner, and the sliding plate 109 is in sealing fit with the sliding sleeve 107 and the first supporting shell 102, the sliding plate 109 moves upwards to push the diethyl toluenediamine on the upper side of the sliding plate 109 back to the second supporting shell 103 again, thereby avoiding the use of a liquid pump, preventing the diethyl toluenediamine from corroding the liquid pump, simultaneously preventing the diethyl toluenediamine from contacting with air, the sliding plate 109 is communicated with a liquid discharge pipe, the liquid discharge pipe of the sliding plate 109 is provided with an electromagnetic valve electrically connected with the control panel 105, the first supporting shell 102 is connected with a second push rod 110 electrically connected with the control panel 105 by bolts, the telescopic end of the second push rod 110 is welded with the sliding plate 109 by a mounting rod, the lower part of the second supporting shell 103 is welded with a fixed block 111, the lower side surface of the fixed block 111 and the inner upper side surface of the first supporting shell 102 are on the same horizontal plane, the upper side surface of the fixed block 111 is sunken downwards, and attachments on the fixed block 111 are all moved downwards along the inclined surface thereof, the fixed block 111 runs through and is connected with circumference equidistant communicating pipe 112, all installs the check valve in the communicating pipe 112, and the middle part of fixed block 111 is provided with and is used for carrying out filterable sediment filtration mechanism to the sediment impurity of sediment impurity in the solution, and sediment filtration mechanism is used for filtering the sediment impurity in the solution, and the sliding plate 109 carries out secondary filtration in pushing the solution after filtering to the second support shell 103, and sediment filtration mechanism is provided with the recoil mechanism that clears up the impurity after filtering, is provided with the rabbling mechanism that is used for accelerating the material and mixes in the second support shell 103.

As shown in fig. 3-6, the sediment filtering mechanism comprises a fixed shell 201, the fixed shell 201 is welded in the middle of a fixed block 111 in a penetrating way, the fixed shell 201 is provided with first through holes 2001 which are equidistant in the circumferential direction, the first through holes 2001 are positioned on the upper side of the fixed block 111, the fixed shell 201 is provided with second through holes 2002 which are equidistant in the circumferential direction, the second through holes 2002 are positioned on the lower side of the fixed block 111, the diameter of the first through holes 2001 in the fixed shell 201 is smaller than that of the second through holes 2002, a rotating shell 202 is rotatably connected with the top cover 104, the lower end of the rotating shell 202 is rotatably connected with the fixed shell 201 and in sealing fit, a filtering shell 203 is slidably connected with the lower end of the fixed shell 201, a filtering hole is arranged at the lower part of the filtering shell 203, when the filtering hole at the lower part of the filtering shell 203 is communicated with the first through holes 2001, sediment generated in the filtering shell 203 is filtered through the filtering holes 2002, the diethyl toluenediamine flows outwards from the second through the filtering holes 2002, the upper and lower parts of the filtering shell 203 are in sealing fit with the fixed shell 201, the upper and lower parts of the filtering shell 204 are slidably connected with the fixed shell 201, the connecting rod 204 is rotatably connected with the connecting rod 204, the connecting rod 205 is rotatably connected with the connecting rod 205 through the connecting rod 105, the connecting rod is rotatably connected with the connecting rod assembly and the connecting rod assembly is welded with the connecting rod 201 through the connecting rod, and the connecting rod assembly is welded and the connecting rod assembly.

As shown in fig. 5, the plugging assembly comprises a first fixing plate 206, the first fixing plate 206 is welded on the inner wall of the fixing shell 201, the first fixing plate 206 is located at the lower side of the second through hole 2002, the first fixing plate 206 is slidably connected with a sliding rod 207, the upper end of the sliding rod 207 is connected with a sealing plate 208 through bolts, the upper side surface of the sealing plate 208 is arranged into a frustum shape, the phenomenon that diethyl toluenediamine remains on the upper side of the sealing plate 208 to cause waste of the diethyl toluenediamine material is avoided, the sliding rod 207 is sleeved with a spring 209 in a ring mode, two ends of the spring 209 are fixedly connected with the first fixing plate 206 and the sealing plate 208 respectively, a sealing ring 210 is welded on the inner wall of the fixing shell 201, and the upper side surface of the sealing ring 210 and the lower side surface of the second through hole 2002 are located on the same horizontal plane, so that the sealing plate 208 and the sealing ring 210 are always sealed under the elastic force of the spring 209.

As shown in fig. 5, the recoil mechanism comprises a gas injection valve 301, the gas injection valve 301 is communicated with the lower side of the rotating shell 202, a switch for pulling downwards is arranged on the gas injection valve 301, an elastic piece is arranged between the switch of the gas injection valve 301 and the rotating shell 202, a connecting ring 302 is fixedly connected to the switch of the gas injection valve 301, the connecting ring 302 is pulled downwards, the gas injection valve 301 is opened to discharge high-pressure air in the rotating shell 202, the high-pressure air is used for recoil cleaning of the filtering shell 203, a first connecting plate 303 is welded on the lower side of the connecting ring 302 through a mounting column, and a limiting ring 304 is welded on the upper portion of the inner side surface of the filtering shell 203.

As shown in fig. 6-9, the stirring mechanism comprises a sealing cover 401, the sealing cover 401 is rotatably connected to the upper end of the rotating shell 202, the sealing cover 401 is communicated with an air inlet pipe 402, the air inlet pipe 402 is communicated with an air pressurizing device electrically connected with the control panel 105, a toothed ring 403 is welded on the upper portion of the rotating shell 202, a first driving motor 404 electrically connected with the control panel 105 is connected to the upper side surface of the top cover 104 through a mounting seat bolt, a gear meshed with the toothed ring 403 is connected to an output shaft key of the first driving motor 404, a stirring plate 405 with equal circumferential intervals is welded on the outer side surface of the rotating shell 202, the stirring plate 405 is driven to rotate circumferentially through the first driving motor 404, a mixed liquid of diethyl toluenediamine and hydrochloric acid is stirred, and the stirring plate 405 is provided with a telescopic cleaning assembly for cleaning the stirring plate 405.

As shown in fig. 7 and 9, the telescopic cleaning component comprises a telescopic plate 406, the telescopic plate 406 is slidably connected to the middle part of the stirring plate 405, the stirring plate 405 is embedded with a fixed pipe 407, the fixed pipe 407 is communicated with the rotating shell 202, the inner end of the fixed pipe 407 is welded with a second connecting plate 408, the second connecting plate 408 is provided with a vent hole, a piston rod 409 is slidably connected in the fixed pipe 407, the outer end of the piston rod 409 passes through the fixed pipe 407 and is in sealing fit with the fixed pipe 407, the outer end of the piston rod 409 is welded with the telescopic plate 406 through a mounting plate, the pressure in the rotating shell 202 is increased, the piston rod 409 pushes the telescopic plate 406 to move outwards, the telescopic plate 406 and the stirring plate 405 synchronously stir the mixed solution of diethyl toluene diamine and hydrochloric acid, the mixing speed of diethyl toluene diamine and hydrochloric acid is improved, a tension spring 410 is fixedly connected between the second connecting plate 408 and the piston rod 409, an n-shaped frame 411 is welded with the n-shaped frame 411, the scraper 412 is slidably matched with the stirring plate 405, the scraper 412 is used for carrying out impurity adhesion on the stirring plate 405, in the process of resetting the telescopic plate 406, the stirring plate 406 is carried out on both sides of the stirring plate 406, the stirring plate 405 is simultaneously, the influence on the stirring plate 405 adhesion of the stirring plate is avoided, and the residual adhesion of the stirring plate 405 is greatly removed.

When the filter device is used, a worker presses a start button of the control panel 105, the control panel 105 starts the third push rod 205, the telescopic end of the third push rod 205 drives the connecting rod 204 to move downwards, the connecting rod 204 drives the filter shell 203 and other parts on the filter shell through the mounting plate to move downwards, the upper part of the filter shell 203 seals the first through hole 2001, then the worker inputs quantitative diethyl toluenediamine into the second support shell 103 through a liquid inlet pipe on the top cover 104, the worker then fills quantitative hydrochloric acid into the second support shell 103 through the liquid inlet pipe on the top cover 104, the control panel starts an air pressurizing device and a first driving motor 404 which are simultaneously communicated with the air inlet pipe 402, the air pressurizing device inputs high-pressure air into the rotating shell 202, the high-pressure air presses the piston rod 409 through a vent hole of the second connecting plate 408 along with the internal pressure of the rotating shell 202, the piston rod 409 slides outwards along the adjacent fixed pipe 407, the piston rod 409 is stretched along the adjacent fixed plate 410, the piston rod 406 drives the adjacent telescopic plate 406 to move outwards along the stirring plate 405 through the mounting plate, the telescopic plate 406 drives the scraper plates 412 on two sides to slide along the outer side of the stirring plate 405 through the n-shaped frame, and simultaneously drives the first stirring plate 405 to move along the stirring plate 405, the mixed solution is driven by the first stirring plate and the second stirring plate 405, the mixed solution is mixed with the mixed solution is heated by the mixed solution of the hydrochloric acid, and the mixed solution is stretched into the stirring solution, and the mixed solution is stretched along the stirring plate is stretched along with the stirring plate 405, and the stirring plate is stretched along with the stirring plate is stretched, and the stirring solution, and the stirring is stretched.

After stirring for a period of time, the control panel 105 turns off the first driving motor 404, the output shaft of the first driving motor 404 stops rotating, the rotating shell 202 and other parts thereon stop rotating, at this time, hydrochloric acid reacts with residual catalyst in the diethyltoluenediamine and generates a precipitate, the control panel 105 starts the third push rod 205 again, the telescopic end of the third push rod 205 drives the filter shell 203 to move upwards through the connecting rod 204, the filter hole at the lower part of the filter shell 203 is communicated with the first through hole 2001, the filter hole of the filter shell 203 filters the precipitate generated in the diethyltoluenediamine, the diethyltoluenediamine flows outwards through the filter hole of the filter shell 203 and from the second through hole 2002, at this time, the sealing plate 208 and the sealing ring 210 are always sealed under the action of the elastic force of the spring 209, the filtered diethyltoluenediamine flows into the cavity between the first support shell 102 and the sliding plate 109, after the filtration of the diethyl toluenediamine in the second supporting shell 103 is completed, the control panel 105 then starts the first push rod 108, the telescopic end of the first push rod 108 drives the sliding sleeve 107 to slide upwards along the fixed shell 201, the sliding sleeve 107 seals the second through hole 2002, when the upper end of the sliding sleeve 107 contacts with the lower side surface of the fixed block 111, the control panel 105 closes the first push rod 108 and starts the second push rod 110, the telescopic end of the second push rod 110 drives the sliding plate 109 to move upwards along the first supporting shell 102 and the sliding sleeve 107 through the mounting rod, the sliding sleeve 107 presses the diethyl toluenediamine upwards, the one-way valve in the communicating pipe 112 is opened, the diethyl toluenediamine is flowed into the second supporting shell 103 again through the communicating pipe 112, after the sliding plate 109 contacts with the lower side surface of the fixed block 111, the control panel 105 controls the second push rod 110 to reset and close the telescopic end.

In the process of upward movement of the sliding plate 109, the control panel 105 starts the third push rod 205, the telescopic end of the third push rod 205 drives the filter shell 203 to move downward through the connecting rod 204, the filter shell 203 drives the sediment attached to the filter shell 203 to move downward to the second through hole 2002, the control panel 105 enables the telescopic end of the third push rod 205 to move downward, the filter shell 203 presses the sealing plate 208 downward, the sealing plate 208 drives the sliding rod 207 to move downward along the first fixing plate 206, the spring 209 is compressed, the sealing plate 208 loses contact with the sealing ring 210, the sealing plate 208 seals the lower part of the filter shell 203, meanwhile, in the process of continuing downward movement of the filter shell 203, the filter shell 203 drives the limiting ring 304 to move downward continuously, until the limiting ring 304 contacts with the first connecting plate 303, the limiting ring 304 drives the first connecting plate 303 to move downward, the first connecting plate 303 drives the connecting ring 302 to move downward through the mounting column, the connecting ring 302 pulls the switch of the air jetting valve 301 downwards, the air jetting valve 301 is opened along with the opening of the air jetting valve 301, high-pressure air in the rotating shell 202 is jetted out from the air jetting valve 301, in the process, the sealing plate 208 always seals the lower part of the filter shell 203, so that air flows outwards from the filter shell 203 through the filtering holes, the high-pressure air jetted out by the air jetting valve 301 carries out backflushing cleaning on sediment attached to the filter shell 203, the filtering holes of the filter shell 203 are prevented from being blocked by the sediment, the filtering efficiency of the diethyl toluenediamine is reduced, meanwhile, the condition that the sediment attached to the filter shell 203 is cleaned untimely is avoided, the sediment is dissolved again, the treatment effect of the residual catalyst in the diethyl toluenediamine by the filtering device is reduced, the sediment cleaned by the filter shell 203 passes through a gap between the sealing plate 208 and the sealing ring 210 under the drive of high-speed flowing air, and is discharged from the lower end of the stationary case 201.

After the filter shell 203 is cleaned, the control panel 105 controls the telescopic end of the third push rod 205 to move upwards to reset and close, the telescopic end of the third push rod 205 drives the filter shell 203 to move upwards to reset through the connecting rod 204, meanwhile, the sealing plate 208 moves upwards to reset under the action of the elastic force of the spring 209, the filter shell 203 drives the limiting ring 304 to be far away from the first connecting plate 303 in the upward moving process of the filter shell 203, the elastic piece on the switch of the air injection valve 301 drives the connecting ring 302 to reset, meanwhile, the air injection valve 301 is closed, the control panel 105 starts the first push rod 108, the telescopic end of the first push rod 108 drives the sliding sleeve 107 to move downwards to reset, the control panel 105 then closes the first push rod 108, after the filter shell 203 is communicated with the first through hole 2001, the filter shell 203 filters the diethyl toluenediamine returned into the second support shell 103 again, the diethyl toluenediamine is pushed upwards through the sliding plate 109 to flow back into the second support shell 103, the diethyl toluenediamine is filtered again by the filter shell 203, and the time for standing precipitation of the diethyl toluenediamine is saved.

After the second filtration of the diethyltoluenediamine is completed, the control panel 105 closes the air pressurizing device, the air pressure in the rotating shell 202 is reduced, under the action of the tension spring 410, the piston rod 409 drives the expansion plate 406 and other parts on the expansion plate 406 to reset, in the process of resetting the expansion plate 406, the stirring plate 405 cleans attachments adhered to two side surfaces of the expansion plate 406, meanwhile, the expansion plate 406 drives the scraping plate 412 to slide along the outer side surface of the stirring plate 405 through the n-shaped frame 411, the scraping plate 412 cleans attachments on the stirring plate 405, a large amount of attachments are prevented from remaining on the stirring plate 405 and the expansion plate 406, the subsequent filtering effect of the diethyltoluenediamine is influenced, attachments cleaned by the stirring plate 405 and the expansion plate 406 flow to the filtering shell 203, the filtering shell 203 filters the cleaned attachments, then the control panel 105 starts the electromagnetic valve of the liquid discharge pipe on the sliding plate 109, the diethyltoluenediamine after the second filtration is discharged through the liquid discharge pipe, after the diethyltoluenediamine is completely discharged, the control panel 105 closes the electromagnetic valve of the liquid discharge pipe, and then the operation is repeated to clean the filtering holes of the filtering shell 203.

Example 2

On the basis of embodiment 1, as shown in fig. 10, the filter device further comprises a Z-shaped plate 5, wherein the Z-shaped plate 5 is fixedly connected to the lower side of the rotating shell 202, the Z-shaped plate 5 is in sliding fit with the upper sides of the fixed shell 201 and the fixed block 111, the lower part of the Z-shaped plate 5 is made of elastic materials, the Z-shaped plate 5 is used for cleaning attachments on the fixed shell 201 and the fixed block 111, and the attachments on the upper side of the fixed block 111 move downwards along the inclined plane on the upper side of the fixed block 111 to the position of the filter shell 203 through the first through hole 2001.

After the expansion plate 406 resets, the attachments under the cleaning move to the upper side of the fixed block 111, the control panel 105 then starts the first driving motor 404, the output shaft of the first driving motor 404 drives the rotating shell 202 to rotate circumferentially through the gear and the toothed ring 403, the rotating shell 202 drives the Z-shaped plate 5 to rotate circumferentially, the Z-shaped plate 5 rotates circumferentially along the fixed shell 201 and the fixed block 111, the Z-shaped plate 5 cleans the attachments on the upper side of the fixed block 111 by mechanical energy, the attachments are prevented from remaining on the upper side of the fixed block 111, the cleaning effect of the Z-shaped plate 5 on the attachments is improved, and after the attachments on the upper side of the fixed block 111 are cleaned, the control panel 105 closes the first driving motor 404.

Example 3

On the basis of embodiment 2, as shown in fig. 3 and 10, the device further comprises a second fixing plate 6 with equal circumferential spacing, the second fixing plate 6 with equal circumferential spacing is fixedly connected to the inner wall of the second supporting shell 103, and in the process that the rotating shell 202 drives the upper parts of the second fixing plate to rotate circumferentially, the stirring plate 405 and the expansion plate 406 stir the diethyl toluenediamine and the hydrochloric acid, the second fixing plate 6 blocks the diethyl toluenediamine rotating circumferentially in the stirring process, the rotational flow direction of the diethyl toluenediamine is changed, so that the catalyst remained in the diethyl toluenediamine is fully mixed with the hydrochloric acid rapidly, and the precipitation efficiency of diethyl toluenediamine precipitate is improved.

Example 4

On the basis of embodiment 3, as shown in fig. 10 and 11, the device further comprises a feeding cleaning mechanism for uniformly adding materials, the feeding cleaning mechanism is arranged on the inner side of the second supporting shell 103, the feeding cleaning mechanism comprises a threaded rod 701, the threaded rod 701 is rotationally connected to the top cover 104, the top cover 104 is connected with a second driving motor 702 through a mounting seat bolt, an output shaft of the second driving motor 702 is connected with the threaded rod 701 through a coupling, an annular plate 703 is slidably connected to the inner wall of the second supporting shell 103, the annular plate 703 is slidably connected with the second fixing plate 6, the lower side surface of the annular plate 703 is provided with an inclined surface, the annular plate 703 moves downwards to clean attachments on the inner wall of the second supporting shell 103, the annular plate 703 is in threaded connection with the threaded rod 701, an annular pipe 704 is connected with an inner annular bolt, the annular pipe 704 is communicated with an equidistant liquid spraying head, hydrochloric acid is added into diethyl toluenediamine from different heights, the hydrochloric acid is uniformly dispersed into the diethyl toluenediamine, the diethyl toluenediamine is fully mixed with the hydrochloric acid, precipitate precipitation efficiency in the diethyl toluenediamine is improved, the top cover 104 penetrates through the lower ends of the annular pipe 704, and the annular pipe 704 is communicated with the upper end of the annular pipe 704, and the upper end of the annular pipe 704 is electrically connected with the annular pipe 704, and the upper end 105 of the annular pipe is communicated with the hydrochloric acid supplementing device.

After a worker adds a certain amount of diethyl toluenediamine into the second supporting shell 103 from the liquid inlet pipe of the top cover 104, the control panel 105 then starts the multi-stage telescopic pipe 705 and the communicated hydrochloric acid replenishing device, the hydrochloric acid replenishing device conveys hydrochloric acid into the annular pipe 704 through the multi-stage telescopic pipe 705, the hydrochloric acid is sprayed out from the liquid spraying head of the annular pipe 704, the control panel 105 then starts the second driving motor 702, the output shaft of the second driving motor 702 drives the threaded rod 701 to rotate anticlockwise, the threaded rod 701 drives the annular plate 703 and other parts on the annular plate 703 to move downwards along the inner wall of the second supporting shell 103 through threads, in the process of downwards moving the annular plate 703, the hydrochloric acid flowing out from the liquid spraying head of the annular pipe 704 flows outwards, through the downward movement of the annular plate 703, hydrochloric acid is added into the diethyl toluenediamine from different heights, the hydrochloric acid is uniformly dispersed into the diethyl toluenediamine, the diethyl toluenediamine is fully mixed with the hydrochloric acid, the precipitation efficiency of the diethyl toluenediamine is improved, after the annular plate 703 reaches the lower part of the second supporting shell 103, the control panel 105 rotates the output of the second driving motor 702 clockwise, the annular plate 703 and other components thereon are reset, the control panel 105 closes the hydrochloric acid supplementing device, the control panel 105 closes the second driving motor 702 and starts the first driving motor 404, and the rotating shell 202 drives the stirring plate 405 and the telescopic plate 406 thereof to stir the mixed solution of the diethyl toluenediamine and the hydrochloric acid.

After the second filtration of diethyl toluenediamine is finished, the control panel 105 restarts the second driving motor 702, the output shaft of the second driving motor 702 rotates anticlockwise to enable the annular plate 703 to move downwards, the annular plate 703 moves downwards to clean attachments on the inner wall of the second supporting shell 103, the annular plate 703 pushes attachments on the second supporting shell 103 and the second fixing plate 6 to the upper side of the fixing block 111, the control panel 105 then controls the second driving motor 702, the output shaft of the second driving motor 702 rotates clockwise to enable the annular plate 703 to reset, the control panel 105 closes the second driving motor 702, the attachments on the inner wall of the second supporting shell 103 are cleaned through the annular plate 703, a large amount of attachments remain on the inner wall of the second supporting shell 103 and the second fixing plate 6, and the attachments on the inner wall of the second supporting shell 103 are prevented from being thickened gradually, so that the subsequent diethyl toluenediamine treatment of the filtering device is affected.

Example 5

Based on the embodiment 4, the method for filtering the diethyl toluenediamine with the circulating filtration function comprises the following specific steps:

s1: the operator presses a start button of the control panel 105, the control panel 105 starts a third push rod 205, the telescopic end of the third push rod 205 drives a connecting rod 204 to move downwards, the connecting rod 204 drives a filter shell 203 and other parts on the filter shell 203 to move downwards through a mounting plate, and the filter shell 203 seals a first through hole 2001;

S2: the worker inputs quantitative diethyl toluenediamine into the second supporting shell 103 through the liquid inlet pipe on the top cover 104, the control panel 105 starts the second driving motor 702 and the hydrochloric acid replenishing device, the annular plate 703 moves downwards when the second driving motor 702 rotates, and the hydrochloric acid flows out from the liquid spraying heads of the annular pipe 704 and is added into the diethyl toluenediamine at different heights;

s3: the control panel 105 starts an air pressurizing device to enable the expansion plate 406 to move outwards along the stirring plate 405, and simultaneously the control panel 105 starts the first driving motor 404, and the expansion plate 406 and the stirring plate 405 circumferentially rotate to stir the mixed solution of the diethyltoluenediamine and the hydrochloric acid;

s4: the control panel 105 starts the third push rod 205, the telescopic end of the third push rod 205 drives the filter shell 203 to move upwards through the connecting rod 204, so that the filter hole of the filter shell 203 is communicated with the first through hole 2001, diethyl toluenediamine flows into the fixed shell 201 from the first through hole 2001 and flows out from the second through hole 2002, and the filter shell 203 filters sediment in the diethyl toluenediamine;

s5: the filter housing 203 moves downward to seal the first through hole 2001, the sliding sleeve 107 moves upward to seal the second through hole 2002, and high-pressure air in the rotating housing 202 is ejected through the air ejection valve 301 to recoil sediment attached to the filter housing 203;

S6: the diethyl toluenediamine flowing out of the second through holes 2002 flows into a cavity between the first support shell 102 and the sliding plate 109, the sliding plate 109 moves upwards to squeeze the diethyl toluenediamine, the diethyl toluenediamine flows into the second support shell 103 again through the communicating pipe 112, the filter shell 203 carries out secondary filtration on the diethyl toluenediamine, and the diethyl toluenediamine after the secondary filtration is discharged from a liquid outlet of the sliding plate 109;

s7: the control panel 105 turns off the air pressurizing device, the pressure in the rotating shell 202 is reduced, the expansion plate 406 is reset, the rotating shell 202 drives the Z-shaped plate 5 to circumferentially rotate, the Z-shaped plate 5 cleans attachments on the fixed block 111, the annular plate 703 moves downwards to clean the inner wall of the second supporting shell 103, and then the step S5 is repeated to clean the filter shell 203 in a backflushing mode.

The foregoing is merely exemplary embodiments of the present application and is not intended to limit the scope of the present application, and various modifications and variations may be suggested to one skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

Claims

1. The diethyl toluenediamine filtering device with the circulating filtering function comprises a supporting frame (101), a first supporting shell (102) is fixedly connected with the supporting frame (101), a second supporting shell (103) is fixedly connected with the upper part of the first supporting shell (102), the first supporting shell (102) is communicated with the second supporting shell (103), a top cover (104) is fixedly connected with the second supporting shell (103), a liquid inlet pipe is communicated with the top cover (104), a control panel (105) is fixedly connected with the supporting frame (101), the diethyl toluenediamine filtering device is characterized in that an annular frame (106) is fixedly connected with the lower side of the first supporting shell (102), the middle part of the annular frame (106) is slidably connected with a sliding sleeve (107), the annular frame (106) is fixedly connected with a first push rod (108) which is electrically connected with the control panel (105), the telescopic end of the first push rod (108) is fixedly connected with the sliding sleeve (107), the sliding sleeve (107) is slidably connected with a sliding plate (109), the sliding plate (109) is slidably connected with the first supporting shell (102), the sliding plate (109) is hermetically matched with the sliding sleeve (107) and the first supporting shell (102), the first electromagnetic valve (102) is fixedly connected with the second push rod (110), the telescopic end of the second push rod (110) is fixedly connected with the sliding plate (109) through the mounting rod, the lower part of the second support shell (103) is fixedly connected with the fixed block (111), the lower side surface of the fixed block (111) and the inner upper side surface of the first support shell (102) are on the same horizontal plane, the upper side surface of the fixed block (111) is sunken downwards, the fixed block (111) is connected with the communicating pipe (112) with the same circumferential distance in a penetrating way, one-way valves are arranged in the communicating pipe (112), the middle part of the fixed block (111) is provided with a precipitation filtering mechanism for filtering precipitation impurities, the precipitation filtering mechanism is used for filtering the precipitation impurities in the solution, and the sliding plate (109) pushes the filtered solution into the second support shell (103) for secondary filtration;

The sedimentation filtering mechanism comprises a fixed shell (201), the fixed shell (201) is fixedly connected to the middle part of a fixed block (111), the fixed shell (201) is provided with circumferentially equidistant first through holes (2001), the first through holes (2001) are positioned at the upper side of the fixed block (111), the fixed shell (201) is provided with circumferentially equidistant second through holes (2002), the second through holes (2002) are positioned at the lower side of the fixed block (111), the diameter of the first through holes (2001) in the fixed shell (201) is smaller than that of the second through holes (2002), a top cover (104) is rotationally connected with a rotating shell (202), the lower end of the rotating shell (202) is rotationally connected with the fixed shell (201) and in sealing fit, the inner sliding connection of the fixed shell (201) is provided with a filtering shell (203), the lower part of the filtering shell (203) is provided with a filtering hole, the upper part and the lower part of the filtering shell (203) are both in sealing fit with the fixed shell (201), the connecting rod (204) is slidably connected with the connecting rod (204), the connecting rod (104) is positioned at the middle part of the rotating shell (202), the top cover (104) is fixedly connected with a third connecting rod (204) which is electrically connected with a control panel (205) through a third connecting rod (203) through a control panel (205), the third connecting rod (204) fixedly connected with the connecting rod (201) through a sealing assembly, and the third connecting rod (204) is fixedly connected with the connecting rod (201), the plugging assembly is used for sealing the fixed shell (201);

The plugging assembly comprises a first fixing plate (206), the first fixing plate (206) is fixedly connected to the inner wall of a fixing shell (201), the first fixing plate (206) is located at the lower side of a second through hole (2002), the first fixing plate (206) is connected with a sliding rod (207) in a sliding mode, the upper end of the sliding rod (207) is fixedly connected with a sealing plate (208), the upper side face of the sealing plate (208) is arranged into a frustum shape and used for reducing the residue of solution on the sealing plate (208), the sliding rod (207) is sleeved with a spring (209), two ends of the spring (209) are fixedly connected with the first fixing plate (206) and the sealing plate (208) respectively, the inner wall of the fixing shell (201) is fixedly connected with a sealing ring (210), the upper side face of the sealing ring (210) and the lower side face of the second through hole (2002) are located on the same horizontal plane, and the sealing ring (210) is in sealing fit with the sealing plate (208) in a sealing mode;

the sedimentation filtering mechanism is provided with a recoil mechanism for cleaning filtered impurities, the recoil mechanism comprises an air injection valve (301), the air injection valve (301) is communicated with the lower side of the rotating shell (202), a switch for pulling downwards is arranged on the air injection valve (301), an elastic piece is arranged between the switch of the air injection valve (301) and the rotating shell (202), a connecting ring (302) is fixedly connected with the switch of the air injection valve (301), a first connecting plate (303) is fixedly connected with the lower side of the connecting ring (302) through a mounting column, and a limiting ring (304) is fixedly connected with the upper part of the inner side surface of the filtering shell (203);

The stirring mechanism for accelerating material mixing is arranged in the second supporting shell (103), the stirring mechanism comprises a sealing cover (401), the sealing cover (401) is rotationally connected to the upper end of the rotating shell (202), the sealing cover (401) is communicated with an air inlet pipe (402), the air inlet pipe (402) is communicated with an air pressurizing device electrically connected with the control panel (105), the upper part of the rotating shell (202) is fixedly connected with a toothed ring (403), the upper side surface of the top cover (104) is fixedly connected with a first driving motor (404) electrically connected with the control panel (105) through a mounting seat, an output shaft of the first driving motor (404) is fixedly connected with a gear meshed with the toothed ring (403), the outer side surface of the rotating shell (202) is fixedly connected with a stirring plate (405) with equal intervals in the circumferential direction, the stirring plate (405) is provided with a telescopic cleaning component, and the telescopic cleaning component is used for cleaning the stirring plate (405);

the telescopic cleaning component comprises a telescopic plate (406), the telescopic plate (406) is connected with the middle of the stirring plate (405) in a sliding mode, the stirring plate (405) is embedded with a fixed pipe (407), the fixed pipe (407) is communicated with the rotating shell (202), one end of the fixed pipe (407) close to the rotating shell (202) is fixedly connected with a second connecting plate (408), the second connecting plate (408) is provided with a vent hole, a piston rod (409) is connected in the fixed pipe (407) in a sliding mode, one end, far away from the second connecting plate (408), of the piston rod (409) penetrates through the fixed pipe (407) and is in sealing fit with the fixed pipe, one end, far away from the second connecting plate (408), of the piston rod (409) is fixedly connected with the telescopic plate (406) through a mounting plate, a tension spring (410) is fixedly connected between the second connecting plate (408) and the piston rod (409), an n-shaped frame (411) is fixedly connected with a symmetrical scraping plate (412), the scraping plate (412) is in sliding fit with the stirring plate (405), and the scraping plate (412) is used for cleaning impurities attached to the stirring plate (405).

2. The diethyl toluenediamine filter device with the circulating filtration function according to claim 1, further comprising a Z-shaped plate (5), wherein the Z-shaped plate (5) is fixedly connected to the lower side of the rotating shell (202), the Z-shaped plate (5) is in sliding fit with the upper side surfaces of the fixed shell (201) and the fixed block (111), the lower part of the Z-shaped plate (5) is made of elastic materials, and the Z-shaped plate (5) is used for cleaning impurities attached to the fixed shell (201) and the sealing plate (208).

3. The diethyl toluene diamine filter device with the circulating filtration function according to claim 2, further comprising circumferentially equidistant second fixing plates (6), wherein the circumferentially equidistant second fixing plates (6) are fixedly connected to the inner wall of the second supporting shell (103), and the second supporting shell (103) is used for changing the rotational flow direction of the solution.

4. The diethyl toluenediamine filter device with the circulating filtration function according to claim 3, further comprising a feeding cleaning mechanism for uniformly adding materials, wherein the feeding cleaning mechanism is arranged on the inner side of the second supporting shell (103), the feeding cleaning mechanism comprises a threaded rod (701), the threaded rod (701) is rotationally connected with the top cover (104), the top cover (104) is fixedly connected with a second driving motor (702) through a mounting seat, an output shaft of the second driving motor (702) is fixedly connected with the threaded rod (701), an annular plate (703) is slidingly connected with the inner wall of the second supporting shell (103), the annular plate (703) is slidingly connected with the second fixing plate (6), the annular plate (703) is in threaded connection with the threaded rod (701), an annular pipe (704) is fixedly connected with the inner annular surface of the annular plate (703), the annular pipe (704) is communicated with an equidistant liquid spraying head, the top cover (104) is penetrated with a multistage telescopic pipe (705), one end of the multistage telescopic pipe (705) is communicated with the annular pipe (704), the other end of the annular pipe (704) is communicated with a hydrochloric acid replenishing device, and the replenishing device is electrically connected with the replenishing device (105) which is communicated with the replenishing device.

5. A filtering method using a diethyl toluenediamine filtering device with a circulating filtering function as defined in claim 4, which is characterized by comprising the following specific steps:

s1: the staff presses a starting button of the control panel (105), the control panel (105) starts a third push rod (205), the telescopic end of the third push rod (205) drives a connecting rod (204) to move downwards, the connecting rod (204) drives a filter shell (203) and other parts on the filter shell to move downwards through a mounting plate, and the filter shell (203) seals a first through hole (2001);

s2: a worker inputs quantitative diethyl toluenediamine into the second supporting shell (103) through a liquid inlet pipe on the top cover (104), the control panel (105) starts the second driving motor (702) and the hydrochloric acid replenishing device, the annular plate (703) moves downwards when the second driving motor (702) rotates, and the hydrochloric acid flows out of a liquid spraying head of the annular pipe (704) and is added into the diethyl toluenediamine at different heights;

s3: the control panel (105) starts an air pressurizing device, the expansion plate (406) moves outwards along the stirring plate (405), meanwhile, the control panel (105) starts the first driving motor (404), and the expansion plate (406) and the stirring plate (405) circumferentially rotate to stir the mixed solution of the diethyltoluenediamine and the hydrochloric acid;

S4: the control panel (105) starts a third push rod (205), the telescopic end of the third push rod (205) drives the filter shell (203) to move upwards through the connecting rod (204), so that the filter hole of the filter shell (203) is communicated with the first through hole (2001), diethyl toluenediamine flows into the fixed shell (201) from the first through hole (2001) and flows out from the second through hole (2002), and sediment in the diethyl toluenediamine is filtered by the filter shell (203);

s5: the filter shell (203) moves downwards to seal the first through hole (2001), the sliding sleeve (107) moves upwards to seal the second through hole (2002), high-pressure air in the rotating shell (202) is sprayed out through the air spraying valve (301), and sediment attached to the filter shell (203) is backflushed;

s6: the diethyl toluenediamine flowing out of the second through holes (2002) flows into a cavity between the first support shell (102) and the sliding plate (109), the sliding plate (109) moves upwards to squeeze the diethyl toluenediamine, the diethyl toluenediamine flows into the second support shell (103) again through the communicating pipe (112), the filter shell (203) carries out secondary filtration on the diethyl toluenediamine, and the diethyl toluenediamine after the secondary filtration is discharged from a liquid outlet of the sliding plate (109);

S7: the control panel (105) closes the air pressurizing device, the pressure in the rotating shell (202) is reduced, the expansion plate (406) is reset, the rotating shell (202) drives the Z-shaped plate (5) to circumferentially rotate, the Z-shaped plate (5) cleans attachments on the fixed block (111), the annular plate (703) moves downwards to clean the inner wall of the second supporting shell (103), and then the step S5 is repeated to clean the filtering shell (203) in a backflushing mode.