CN111439860A

CN111439860A - Filtering device for textile printing and dyeing and filtering method thereof

Info

Publication number: CN111439860A
Application number: CN202010154968.5A
Authority: CN
Inventors: 张福明
Original assignee: Wujiang Fuailiang Textile Co ltd
Current assignee: Wujiang Fuailiang Textile Co ltd
Priority date: 2020-03-09
Filing date: 2020-03-09
Publication date: 2020-07-24

Abstract

The invention provides a filtering device for textile printing and dyeing and a filtering method thereof. The filtering device for textile printing and dyeing comprises: the top of the floating box is fixedly connected with a floating gas box through a bearing plate, the top on the right side of the floating gas box is communicated with an exhaust pipe, and the top of the floating gas box is provided with a gas booster pump. The filtering device and the filtering method for textile printing and dyeing provided by the invention are used for carrying out primary filtering on the thread ends and the rags in the textile printing and dyeing wastewater, preventing the large suspended matters from blocking the device, prolonging the service life of the device, carrying out secondary cleaning and filtering on the fine suspended matters in the textile printing and dyeing wastewater, improving the sewage filtering quality, firstly filtering the larger suspended matters such as the thread ends and the rags, and then filtering the fine suspended matters, and carrying out classified filtering, so that the filtering effect is better, the filtering efficiency is higher, the filtering is more thorough, the decoloring efficiency of the printing and dyeing wastewater is accelerated, and the filtering efficiency is improved.

Description

Filtering device for textile printing and dyeing and filtering method thereof

Technical Field

The invention relates to the field of textile printing and dyeing wastewater filtering devices, in particular to a filtering device for textile printing and dyeing and a filtering method thereof.

Background

The textile wastewater is mainly wastewater containing natural impurities, fat, starch and other organic matters generated in the processes of raw material cooking, rinsing, bleaching, sizing and the like, the printing and dyeing wastewater is generated in a plurality of working procedures of washing, dyeing, printing, sizing and the like, contains a large amount of dye, starch, cellulose, lignin, detergent and other organic matters, alkali, sulfide, various salts and other inorganic matters, and has strong pollution.

At present, the existing textile printing and dyeing filtering device has poor treatment effect on suspended matters inside sewage in the printing and dyeing wastewater treatment process, low filtering efficiency and long-time use, and the suspended matters easily block the device, thus influencing the service life of the device.

Therefore, it is necessary to provide a filtering apparatus for textile printing and dyeing and a filtering method thereof to solve the above technical problems.

Disclosure of Invention

The invention provides a filtering device for textile printing and dyeing and a filtering method thereof, which solve the problem of poor filtering effect of suspended matters in the prior art.

In order to solve the above technical problems, the present invention provides a filtering apparatus for textile printing and dyeing, comprising: the floating box is characterized in that the top of the floating box is fixedly connected with a floating gas box through a bearing plate, the top on the right side of the floating gas box is communicated with an exhaust pipe, the top of the floating gas box is provided with a gas booster pump, the gas inlet end of the gas booster pump is communicated with a gas inlet pipe, the gas outlet end of the gas booster pump is communicated with a connecting pipe, the two sides of the top of the floating gas box are respectively and fixedly connected with a support and a mounting frame, one end of the connecting pipe penetrates through the mounting frame and extends to one side of the mounting frame, one end of the connecting pipe is communicated with an outlet pipe, one end of the outlet pipe penetrates through the floating gas box and extends to the inside of the floating gas box, the two sides of the bottom of the inner wall of the floating gas box are both fixedly connected with fixed plates, one end of the outlet pipe, the top of outlet duct just is located the even intercommunication in left side to the right side of the inside of gas case and has the gas tube that floats.

Preferably, the top of the flotation tank is provided with driving motor, the bottom of flotation tank inner wall and the front that is located the outlet duct have the drive shaft from a left side to the right side even running through, the top of drive shaft and the top that is located the outlet duct are provided with the impeller, the bottom of drive shaft is provided with drive gear, the bottom of flotation tank just is located one drive shaft and another it is connected with the transmission shaft to rotate between the relative one side of drive shaft.

Preferably, the bottom of transmission shaft is provided with drive gear, driving motor's output shaft and the bottom fixed connection of one drive gear, drive gear meshes with drive gear mutually, the drive shaft rotates with the superficial gas case and is connected.

Preferably, fixedly connected with water blocking tank between the top of support and the top of mounting bracket, water blocking tank's inside is provided with the grid, the top of grid is provided with the handle, one side fixedly connected with water diversion tank that the mounting bracket was kept away from to the support, one side that water blocking tank kept away from the mounting bracket runs through the inside of leading the water diversion tank and extending to the water diversion tank, the bottom intercommunication of water diversion tank has the inlet tube, the one end of inlet tube runs through the inside that the aerostatics just extended to the aerostatics.

Preferably, the two sides of the top of the bleaching box are both communicated with discharge pipes, and one ends of the discharge pipes penetrate through the floating box and extend to the inside of the floating box.

Preferably, there is the filter screen through slider sliding connection between the both sides of bleaching incasement wall, the top of filter screen is provided with the handle, the below intercommunication that one side of bleaching case just is located the filter screen has the filling tube, one side fixedly connected with motor case of bleaching case, the inside of motor case is provided with agitator motor.

Preferably, agitator motor's output shaft is provided with the (mixing) shaft, the one end of (mixing) shaft runs through the inside that bleaching case just extended to the bleaching case, the surface of (mixing) shaft and the inside that is located the bleaching case evenly are provided with the stirring leaf, the bottom intercommunication of bleaching case has the outlet pipe, the front of bleaching case articulates through the hinge has the chamber door.

Preferably, the sliding device comprises a sliding frame, a sliding plate is slidably connected inside the sliding frame, one side of the sliding plate penetrates through the sliding frame and extends to the outside of the sliding frame, a connecting plate is fixedly connected to one side of the sliding plate and located outside the sliding frame, and one side of the connecting plate, which is far away from the sliding frame, and the filter screen.

A filtering method of a filtering device for textile printing and dyeing comprises the following use steps:

s1: when needs carry out prefiltering with great suspension end of a thread and the rag in the weaving printing and dyeing waste water, pour sewage into the inside that blocks the water tank, pour into from the right side at grid top, intercept the inside suspension end of a thread and the rag of sewage layer by layer through the baffle on the grid and filter, end of a thread and rag are hung on the grid, and the water after the filtration flows into the inside of leading the water tank from blocking the water tank, and the inside of leading the gas tank into is flowed into to the inlet tube of rethread water tank bottom.

S2: when tiny suspended matters in the textile printing and dyeing wastewater need to be filtered, a gas booster pump is started, external air is extracted through an air inlet pipe, the extracted air is conveyed to the inside of an air outlet pipe through a connecting pipe and is conveyed to the inside of a floating air pipe in a floating air box through the air outlet pipe, compressed air in the floating air pipe escapes into water in a tiny bubble form from an air hole, a driving motor is started simultaneously to drive one driving gear to rotate, one driving gear drives one driving shaft to rotate and simultaneously drives the driving gears on two sides to rotate, the driving gears on two sides rotate at the bottom of the floating air box through a transmission shaft, two driving gears rotate simultaneously and drive the other two driving gears to rotate, the other two driving gears respectively drive the other two driving shafts to rotate, so as to drive the other two impellers to rotate rapidly, and large bubbles are cut into small bubbles by virtue of, bubbles and fine particles are adsorbed and float to the water surface, redundant gas is discharged from the exhaust pipe, the driving motor and the gas booster pump are closed, the valve on the discharge pipe is opened, the separated particle bubbles and sewage are discharged into the bleaching box from the discharge pipe, and the bubble particles are filtered through the filter screen.

S3: when needs take out the suspended solid, through the handle on the grid, mention the grid to take out the grid from the inside that blocks the water tank, wash the grid, come down with end of a thread and rag washing, open the chamber door switch on the bleaching case, outwards stimulate the handle, make the filter screen pass through connecting plate and sliding plate and slide on the sliding frame, slide out from the inside of bleaching case, wash the filter screen again.

S4: when needs carry out quick decoloration to sewage, add the inside of into bleaching case from the filling tube with bleaching powder, start agitator motor, drive the (mixing) shaft and rotate to drive the stirring leaf and rotate, the stirring leaf is with sewage and bleaching powder rapid mixing reaction, bleaches sewage, and bleaching finishes, closes agitator motor, opens the valve on the outlet pipe, and the waste water that will handle is discharged from the outlet pipe.

Compared with the related art, the filtering device and the filtering method for textile printing and dyeing provided by the invention have the following beneficial effects:

the invention provides a filtering device for textile printing and dyeing and a filtering method thereof, wherein the device is prevented from being blocked by massive suspended matters by using a grating, a water blocking tank, a water diversion tank and a water inlet pipe in a matched manner, the service life of the device is prolonged, and the device is used for carrying out secondary cleaning and filtering on tiny suspended matters in the textile printing and dyeing by using a gas booster pump, an air inlet pipe, a connecting pipe, an air outlet pipe, a floating air pipe, an exhaust pipe, a transmission gear, a transmission shaft, an impeller, a driving shaft, a driving gear and a driving motor in a matched manner, so that the filtering quality of sewage is improved The filter screen and the charging pipe are matched for use, so that the decolorizing efficiency of the printing and dyeing wastewater is improved, and the filtering efficiency is improved.

Drawings

FIG. 1 is a schematic structural diagram of a preferred embodiment of a filtering device for textile printing and dyeing provided by the invention;

FIG. 2 is a schematic top view of the structure of the water retention tank shown in FIG. 1;

FIG. 3 is an enlarged partial view of the structure shown at A in FIG. 1;

FIG. 4 is a schematic front view of the bleaching tank of FIG. 1;

fig. 5 is a schematic structural view of the sliding device shown in fig. 1.

Reference numbers in the figures: 1. the floating box comprises a floating box body, 2, a bearing plate, 3, a floating gas box body, 4, an exhaust pipe, 5, a gas booster pump, 6, an air inlet pipe, 7, a connecting pipe, 8, an air outlet pipe, 9, a fixing plate, 10, a floating gas pipe, 11, a transmission shaft, 12, a transmission gear, 13, a driving shaft, 14, an impeller, 15, a driving gear, 16, a driving motor, 17, a mounting frame, 18, a support, 19, a water blocking box body, 20, a grating, 21, a lifting handle, 22, a water guiding box body, 23, a discharging pipe, 24, a sliding device, 25, a filter screen, 26, a handle, 27, a feeding pipe, 28, a motor box body, 29, a stirring motor, 30, a stirring shaft, 31, stirring blades, 32, a water outlet pipe, 33, a box door, 34, a water inlet pipe.

Detailed Description

The invention is further described with reference to the following figures and embodiments.

Referring to fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, wherein fig. 1 is a schematic structural diagram of a filter device for textile printing and dyeing according to a preferred embodiment of the present invention; FIG. 2 is a schematic top view of the structure of the water retention tank shown in FIG. 1; FIG. 3 is an enlarged partial view of the structure shown at A in FIG. 1; FIG. 4 is a schematic front view of the bleaching tank of FIG. 1; fig. 5 is a schematic structural view of the sliding device shown in fig. 1. A filter device for textile printing and dyeing comprises:

float case

1, 2 fixedly connected with flotation tank 3 are passed through at the top of float case 1, the top intercommunication on flotation tank 3 right side has blast pipe 4, flotation tank 3's top is provided with gaseous booster pump 5, gaseous booster pump 5's model is AG-15, gaseous booster pump 5's inlet end intercommunication has intake pipe 6, gaseous booster pump 5's the end intercommunication of giving vent to anger has connecting pipe 7, the both sides at flotation tank 3 top are fixedly connected with support 18 and mounting bracket 17 respectively, support 18 highly is the half of mounting bracket 17 height, make water blocking tank 19 slope installation, connecting pipe 7's one end runs through mounting bracket 17 and extends to one side of mounting bracket 17, connecting pipe 7's one end intercommunication has outlet duct 8, the one end of outlet duct 8 runs through flotation tank 3 and extends to flotation tank 3's inside, the equal fixedly connected with fixed plate 9 in both sides of flotation tank 3 inner wall bottom, the one end that outlet duct 8 is located flotation tank 3's inside runs through a fixed plate 9 and another fixed plate in 9 and extend to one side of another fixed plate 9, the top of outlet duct 8 and the inside that is located aerostatics case 3 evenly communicates from a left side to the right side has the gas tube 10, and the quantity of gas tube 10 is four, has seted up four gas pockets on the gas tube 10.

The top of the flotation tank 1 is provided with a driving motor 16, the driving motor 16 is connected with an external power supply and is provided with a switch of a control power supply, the bottom of the inner wall of the flotation tank 3 and the front surface of the air outlet pipe 8 uniformly penetrate through a driving shaft 13 from left to right, the top end of the driving shaft 13 and the upper side of the air outlet pipe 8 are provided with impellers 14, the number of the impellers 14 is three, the bottom end of the driving shaft 13 is provided with a driving gear 15, and the bottom of the flotation tank 3 is rotatably connected with a transmission shaft 11 between the opposite side of one driving shaft 13 and the other driving shaft 13.

The bottom of transmission shaft 11 is provided with drive gear 12, and the output shaft of driving motor 16 is connected with the bottom fixed connection of a drive gear 15, and drive gear 12 meshes with drive gear 15 mutually, and drive shaft 13 is connected with aerostatics 3 rotation, and the quantity of drive gear 12 is two, and the quantity of transmission shaft 11 is two, and the quantity of drive gear 15 is three, and the quantity of drive shaft 13 is three.

Fixedly connected with water blocking tank 19 between the top of support 18 and the top of mounting bracket 17, water blocking tank 19's inside is provided with grid 20, grid 20's top is provided with handle 21, the quantity of handle 21 is four, grid 20 contacts with water blocking tank 19's inside, one side fixedly connected with diversion tank 22 that mounting bracket 17 was kept away from to support 18, one side that water blocking tank 19 kept away from mounting bracket 17 runs through diversion tank 22 and extends to the inside of diversion tank 22, the diversion tank 19 is located one side of diversion tank 22 inside and has seted up out the basin, the top of diversion tank 22 is non-closed, the top of diversion tank 19 is non-closed, the bottom intercommunication of diversion tank 22 has inlet tube 34, the one end of inlet tube 34 runs through aerostatics 3 and extends to the inside of aerostatics 3.

The both sides at 1 top of bleaching case all communicate with discharging pipe 23, and the one end of discharging pipe 23 runs through superficial gas tank 3 and extends to the inside of superficial gas tank 3, is provided with the valve on the discharging pipe 23.

There is filter screen 25 through 24 sliding connection of slider between the both sides of bleaching case 1 inner wall, the top of filter screen 25 is provided with handle 26, the below intercommunication that one side of bleaching case 1 just is located filter screen 25 has filling tube 27, one side fixedly connected with motor case 28 of bleaching case 1, the inside of motor case 28 is provided with agitator motor 29, agitator motor 29 connects external power source and is provided with control power source's switch, the top of bleaching case 1 is provided with the circular arc recess, the quantity of handle 26 is two, be located the front side and the rear side at filter screen 25 top respectively.

The output shaft of agitator motor 29 is provided with (mixing) shaft 30, the one end of (mixing) shaft 30 runs through bleaching case 1 and extends to the inside of bleaching case 1, the surface of (mixing) shaft 30 and the inside that is located bleaching case 1 evenly are provided with stirring leaf 31, the quantity of stirring leaf 31 is five, the bottom intercommunication of bleaching case 1 has outlet pipe 32, be provided with the valve on the outlet pipe 32, the front of bleaching case 1 articulates through the hinge has chamber door 33, chamber door 33 and filter screen 25 looks adaptation, be provided with the switch on the chamber door 33.

The sliding device 24 includes a sliding frame 241, a sliding plate 242 is slidably connected to the inside of the sliding frame 241, one side of the sliding plate 242 penetrates the sliding frame 241 and extends to the outside of the sliding frame 241, a connecting plate 243 is fixedly connected to one side of the sliding plate 242 and located at the outside of the sliding frame 241, one side of the connecting plate 243 far away from the sliding frame 241 and the filter screen 25 are connected, and the filter screen 25 is in an arc shape.

s1: when needing to carry out the prefiltering with great suspension end of a thread and the rag in the textile printing and dyeing waste water, pour sewage into the inside of blocking water tank 19, pour into from the right side at grid 20 top, intercept the inside suspension end of a thread and the rag of sewage layer by layer through the baffle on grid 20 and filter, end of a thread and rag are hung on grid 20, water after the filtration flows into the inside of leading water tank 22 from blocking water tank 19, the inside of leading air tank 3 is flowed into to the rethread inlet tube 34 of leading water tank 22 bottom.

S2: when fine suspended matters in the textile printing and dyeing wastewater need to be filtered, a gas booster pump 5 is started, external air is extracted through an air inlet pipe 6, then the extracted air is conveyed to the inside of an air outlet pipe 8 through a connecting pipe 7, and then the extracted air is conveyed to the inside of a floating air pipe 10 in a floating air box 3 through the air outlet pipe 8, compressed air in the floating air pipe 10 escapes into water in the form of micro bubbles from air holes, a driving motor 16 is started at the same time to drive a driving gear 15 to rotate, one driving gear 15 drives a driving shaft 13 to rotate and simultaneously drives transmission gears 12 on two sides to rotate, the transmission gears 12 on two sides rotate at the bottom of the floating air box 3 through a transmission shaft 11, two transmission gears 12 rotate and simultaneously drive the other two driving gears 15 to rotate, the other two driving shafts 13 are respectively driven by the other two driving gears 15, by means of the stirring effect of the impeller 14 during high-speed rotation, large bubbles are cut into small bubbles, the bubbles are adsorbed to fine particles and float to the water surface, redundant gas is discharged from the exhaust pipe 4, the driving motor 16 and the gas booster pump 5 are closed, a valve on the discharge pipe 23 is opened, the separated particle bubbles and sewage are discharged into the bleaching box 1 from the discharge pipe 23, and the bubble particles are filtered through the filter screen 25.

S3: when the suspended matter needs to be taken out, the grating 20 is lifted up through the handle 21 on the grating 20, so that the grating 20 is taken out from the inside of the water blocking tank 19, the grating 20 is cleaned, the thread ends and the rags are cleaned, the door 33 on the bleaching tank 1 is opened and closed, the handle 26 is pulled outwards, the filter screen 25 slides on the sliding frame 241 through the connecting plate 243 and the sliding plate 242, slides out from the inside of the bleaching tank 1, and then the filter screen 25 is cleaned.

S4: when needing to carry out quick decoloration to sewage, add bleaching powder from the filling tube 27 and advance the inside of bleaching case 1, start agitator motor 29, drive (mixing) shaft 30 and rotate to drive stirring leaf 31 and rotate, stirring leaf 31 is with sewage and bleaching powder rapid mixing reaction, bleach sewage, and the bleaching finishes, closes agitator motor 29, opens the valve on the outlet pipe 32, and the waste water that will handle is discharged from outlet pipe 32.

The working principle of the filtering device for textile printing and dyeing provided by the invention is as follows:

when large suspended thread ends and broken cloth in the textile printing and dyeing wastewater need to be primarily filtered, sewage is poured into the water blocking tank 19 from the right side of the top of the grid 20, the suspended thread ends and the broken cloth in the sewage are intercepted and filtered layer by layer through the partition plates on the grid 20, the thread ends and the broken cloth are hung on the grid 20, the filtered water flows into the water guiding tank 22 from the water blocking tank 19 and flows into the air floating tank 3 through the water inlet pipe 34 at the bottom of the water guiding tank 22, when fine suspended matters in the textile printing and dyeing wastewater need to be filtered, the gas booster pump 5 is started to pump external air through the air inlet pipe 6, the external air is conveyed to the inside of the air outlet pipe 8 through the connecting pipe 7 and is conveyed to the inside of the air floating pipe 10 in the air floating tank 3 through the air outlet pipe 8, and compressed air in the air floating pipe 10 escapes into the water in a micro-bubble form from the air holes, simultaneously starting a driving motor 16 to drive a driving gear 15 to rotate, wherein the driving gear 15 drives a driving shaft 13 to rotate and simultaneously drives transmission gears 12 on two sides to rotate, the transmission gears 12 on two sides rotate at the bottom of the air flotation tank 3 through a transmission shaft 11, two transmission gears 12 rotate and simultaneously drive the other two driving gears 15 to rotate, the other two driving gears 15 respectively drive the other two driving shafts 13 to rotate so as to drive the other two impellers 14 to rotate rapidly, large bubbles are cut into small bubbles by virtue of the stirring effect when the impellers 14 rotate at a high speed, the bubbles are adsorbed with fine particles and float to the water surface, redundant gas is discharged from an exhaust pipe 4, then the driving motor 16 and a gas booster pump 5 are closed, a valve on a discharge pipe 23 is opened, and the separated particle bubbles and sewage are discharged into the interior of the air flotation tank 1 from the discharge pipe 23, the bubble particles are filtered by the filter screen 25, when suspended matters need to be taken out, the grid 20 is lifted by the handle 21 on the grid 20, so that the grid 20 is taken out from the inside of the water blocking tank 19, the grid 20 is cleaned, thread ends and rags are cleaned, the door 33 on the bleaching tank 1 is opened, the handle 26 is pulled outwards, the filter screen 25 slides on the sliding frame 241 through the connecting plate 243 and the sliding plate 242 and slides out from the inside of the bleaching tank 1, the filter screen 25 is cleaned, when sewage needs to be rapidly decolorized, bleaching powder is added into the bleaching tank 1 from the feeding pipe 27, the stirring shaft 29 is started to drive the stirring shaft 30 to rotate, the stirring blade 31 drives the stirring blade 31 to rapidly mix and react the sewage and the bleaching powder, the sewage is bleached, the stirring motor 29 is closed, a valve on the water outlet pipe 32 is opened, the treated wastewater is discharged from the water outlet pipe 32.

through the matching use of the grating 20, the water blocking tank 19, the water diversion tank 22 and the water inlet pipe 34, the thread ends and the rags in the textile printing and dyeing wastewater are subjected to primary filtration, the blocking of large suspended matters on the device is prevented, the service life of the device is prolonged, through the matching use of the gas booster pump 5, the air inlet pipe 6, the connecting pipe 7, the air outlet pipe 8, the air floating pipe 10, the exhaust pipe 4, the transmission gear 12, the transmission shaft 11, the impeller 14, the driving shaft 13, the driving gear 15 and the driving motor 16, the fine suspended matters in the textile printing and dyeing wastewater are subjected to secondary cleaning and filtration, the sewage filtration quality is improved, the thread ends, the rags and other large suspended matters are firstly filtered, then the fine suspended matters are filtered, the graded filtration is realized, the filtration effect is better, the filtration efficiency is higher, the filtration is more thorough, through the matching use of the filter screen 25, the stirring, quickens the decoloration efficiency of the printing and dyeing wastewater and improves the filtration efficiency.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A filter device for textile printing and dyeing, comprising: the floating box comprises a floating box (1), wherein the top of the floating box (1) is fixedly connected with a floating gas box (3) through a bearing plate (2), the top on the right side of the floating gas box (3) is communicated with an exhaust pipe (4), the top of the floating gas box (3) is provided with a gas booster pump (5), the air inlet end of the gas booster pump (5) is communicated with an air inlet pipe (6), the air outlet end of the gas booster pump (5) is communicated with a connecting pipe (7), the two sides of the top of the floating gas box (3) are respectively and fixedly connected with a support (18) and a mounting frame (17), one end of the connecting pipe (7) penetrates through the mounting frame (17) and extends to one side of the mounting frame (17), one end of the connecting pipe (7) is communicated with an air outlet pipe (8), one end of the air outlet pipe (8) penetrates through the floating gas box (3) and extends to the inside of the floating gas box (3), and fixing plates (9, the one end that outlet duct (8) are located the inside of superficial gas tank (3) runs through one in proper order fixed plate (9) and another fixed plate (9) and extend to another one side of fixed plate (9), the top of outlet duct (8) and the inside that is located superficial gas tank (3) evenly communicate from a left side to the right side has superficial trachea (10).

2. The filtering device for textile printing and dyeing according to claim 1, characterized in that a driving motor (16) is arranged at the top of the bleaching box (1), a driving shaft (13) is uniformly penetrated through the bottom of the inner wall of the bleaching box (3) and positioned on the front surface of the air outlet pipe (8) from left to right, an impeller (14) is arranged at the top end of the driving shaft (13) and positioned above the air outlet pipe (8), a driving gear (15) is arranged at the bottom end of the driving shaft (13), and a transmission shaft (11) is rotatably connected between one driving shaft (13) and the opposite side of the other driving shaft (13) at the bottom of the bleaching box (3).

3. The filtering device for textile printing and dyeing according to claim 2, characterized in that the bottom end of the transmission shaft (11) is provided with a transmission gear (12), the output shaft of the driving motor (16) is fixedly connected with the bottom of one of the driving gears (15), the transmission gear (12) is meshed with the driving gear (15), and the driving shaft (13) is rotatably connected with the aeration tank (3).

4. The filtering device for textile printing and dyeing according to claim 1, characterized in that a water blocking tank (19) is fixedly connected between the top of the support (18) and the top of the mounting frame (17), a grating (20) is arranged inside the water blocking tank (19), a handle (21) is arranged on the top of the grating (20), a water guiding tank (22) is fixedly connected to one side of the support (18) away from the mounting frame (17), one side of the water blocking tank (19) away from the mounting frame (17) penetrates through the water guiding tank (22) and extends to the inside of the water guiding tank (22), a water inlet pipe (34) is communicated with the bottom of the water guiding tank (22), and one end of the water inlet pipe (34) penetrates through the air flotation tank (3) and extends to the inside of the air flotation tank (3).

5. The filtering device for textile printing and dyeing according to claim 1, characterized in that the bleaching tank (1) is communicated with a discharge pipe (23) on both sides of the top, and one end of the discharge pipe (23) penetrates through the flotation tank (3) and extends to the inside of the flotation tank (3).

6. The filtering device for textile printing and dyeing according to claim 1, characterized in that a filter screen (25) is connected between two sides of the inner wall of the bleaching box (1) in a sliding manner through a sliding device (24), a handle (26) is arranged on the top of the filter screen (25), a feeding pipe (27) is communicated with one side of the bleaching box (1) and is positioned below the filter screen (25), a motor box (28) is fixedly connected with one side of the bleaching box (1), and a stirring motor (29) is arranged inside the motor box (28).

7. The filtering device for textile printing and dyeing according to claim 6, characterized in that the output shaft of the stirring motor (29) is provided with a stirring shaft (30), one end of the stirring shaft (30) penetrates through the bleaching box (1) and extends into the bleaching box (1), stirring blades (31) are uniformly arranged on the surface of the stirring shaft (30) and inside the bleaching box (1), the bottom of the bleaching box (1) is communicated with a water outlet pipe (32), and the front of the bleaching box (1) is hinged with a box door (33) through a hinge.

8. The filtering device for textile printing and dyeing according to claim 6, characterized in that the sliding device (24) comprises a sliding frame (241), a sliding plate (242) is slidably connected inside the sliding frame (241), one side of the sliding plate (242) penetrates through the sliding frame (241) and extends to the outside of the sliding frame (241), a connecting plate (243) is fixedly connected to one side of the sliding plate (242) and is positioned outside the sliding frame (241), and one side of the connecting plate (243) away from the sliding frame (241) and the filtering net (25) are fixedly connected.

9. A filtering method of a filtering device for textile printing and dyeing is characterized by comprising the following using steps:

s1: when large suspended thread ends and broken cloth in the textile printing and dyeing wastewater need to be preliminarily filtered, sewage is poured into the water blocking tank (19) and is poured from the right side of the top of the grid (20), the suspended thread ends and the broken cloth in the sewage are intercepted and filtered layer by layer through the partition plates on the grid (20), the thread ends and the broken cloth are hung on the grid (20), and the filtered water flows into the water leading tank (22) from the water blocking tank (19) and then flows into the floating air tank (3) through the water inlet pipe (34) at the bottom of the water leading tank (22);

s2: when tiny suspended matters in the textile printing and dyeing wastewater need to be filtered, a gas booster pump (5) is started, external air is extracted through an air inlet pipe (6), then the air is conveyed to the inside of an air outlet pipe (8) through a connecting pipe (7), and then the air is conveyed to the inside of a floating air pipe (10) in a floating air box (3) through the air outlet pipe (8), compressed air in the floating air pipe (10) escapes into water in a micro-bubble form from an air hole, a driving motor (16) is started simultaneously to drive one driving gear (15) to rotate, one driving gear (15) drives one driving shaft (13) to rotate and simultaneously drives transmission gears (12) on two sides to rotate, the transmission gears (12) on two sides rotate at the bottom of the floating air box (3) through a transmission shaft (11), two transmission gears (12) rotate and simultaneously drive the other two driving gears (15) to rotate, the other two driving gears (15) respectively drive the other two driving shafts (13) to rotate, so that the other two impellers (14) are driven to rotate rapidly, large bubbles are cut into small bubbles by virtue of the stirring effect of the impellers (14) during high-speed rotation, the bubbles and fine particles are adsorbed and float to the water surface, redundant gas is discharged from the exhaust pipe (4), then the driving motor (16) and the gas booster pump (5) are closed, a valve on the discharge pipe (23) is opened, the separated particle bubbles and sewage are discharged into the interior of the bleaching box (1) from the discharge pipe (23), and the bubble particles are filtered by the filter screen (25);

s3: when suspended matters need to be taken out, the grating (20) is lifted through the lifting handle (21) on the grating (20), so that the grating (20) is taken out from the inside of the water blocking box (19), the grating (20) is cleaned, thread ends and rags are cleaned down, a box door (33) on the bleaching box (1) is opened and closed, the handle (26) is pulled outwards, the filter screen (25) slides on the sliding frame (241) through the connecting plate (243) and the sliding plate (242), slides out from the inside of the bleaching box (1), and then the filter screen (25) is cleaned;

s4: when needing to carry out quick decoloration to sewage, add into the inside of bleaching case (1) from filling tube (27) with bleaching powder, start agitator motor (29), drive (mixing) shaft (30) and rotate to drive stirring leaf (31) and rotate, stirring leaf (31) are with sewage and bleaching powder rapid mixing reaction, bleach sewage, bleach, close agitator motor (29), open the valve on outlet pipe (32), discharge treated waste water from outlet pipe (32).