阅读说明：本技术 一种环保型表面施胶剂的生产装置及其生产工艺 (Production device and production process of environment-friendly surface sizing agent ) 是由 张连腾 杨涛 洪明 孙中桥 李长杰 成开强 陈小斌 张志高 于 2021-09-10 设计创作，主要内容包括：本发明公开了一种环保型表面施胶剂的生产装置及其生产工艺,涉及表面施胶剂生产技术领域,为解决现有表面施胶剂生产装置一般为反应釜,在进行多次生产制备后,反应釜内部难以做到全面清理,导致内壁容易残留杂质影响后续生产的问题。所述施胶剂反应釜本体的上方设置有喷淋层,所述喷淋层的内部设置有喷淋输水管,所述喷淋输水管的下方设置有喷淋头,且喷淋头设置有若干个,所述施胶剂反应釜本体的内壁设置有电动转轴,且电动转轴设置有若干个,所述电动转轴的外壁设置有活动挡板,所述活动挡板一端的外壁设置有磁贴面,且活动挡板的一端通过磁贴面与另一个所述电动转轴磁吸连接,所述施胶剂反应釜本体最上方的中间位置处设置有驱动电机。(The invention discloses a production device and a production process of an environment-friendly surface sizing agent, relates to the technical field of surface sizing agent production, and aims to solve the problems that the conventional surface sizing agent production device is generally a reaction kettle, and after multiple production and preparation processes are carried out, the interior of the reaction kettle is difficult to be completely cleaned, so that impurities are easily remained on the inner wall to influence subsequent production. Sizing agent reation kettle body's top is provided with sprays the layer, the inside that sprays the layer is provided with sprays the raceway, the below that sprays the raceway is provided with the shower head, and the shower head is provided with a plurality of, sizing agent reation kettle body's inner wall is provided with electronic pivot, and electronic pivot is provided with a plurality of, electronic pivot's outer wall is provided with adjustable fender, the outer wall of adjustable fender one end is provided with the magnetism wainscot, and adjustable fender's one end is passed through magnetism wainscot and another connection is inhaled to electronic pivot magnetism, the intermediate position department of sizing agent reation kettle body top is provided with driving motor.)

1. The utility model provides an environment-friendly surface sizing agent's apparatus for producing, includes sizing agent reation kettle body (1), its characterized in that: sizing agent reation kettle body's (1) top is provided with sprays layer (13), the inside of spraying layer (13) is provided with sprays raceway (14), the below of spraying raceway (14) is provided with shower head (15), and shower head (15) are provided with a plurality of, the inner wall of sizing agent reation kettle body (1) is provided with electronic pivot (31), and electronic pivot (31) are provided with a plurality of, the outer wall of electronic pivot (31) is provided with adjustable fender (32), the outer wall of adjustable fender (32) one end is provided with magnetism wainscot (33), and the one end of adjustable fender (32) passes through magnetism wainscot (33) and another connection is inhaled to electronic pivot (31) magnetism, the intermediate position department of sizing agent reation kettle body (1) top is provided with driving motor (24).

2. The apparatus for producing an environment-friendly surface sizing agent according to claim 1, wherein: the output of driving motor (24) is provided with shaft coupling (25), the lower extreme of shaft coupling (25) is provided with transfer line (26), the output of driving motor (24) passes through shaft coupling (25) and is connected with transfer line (26) transmission, the outer wall of transfer line (26) is provided with stirring leaf (27), and stirs leaf (27) and be provided with a plurality of, the lower extreme of transfer line (26) is provided with gear driven box (28).

3. The apparatus for producing an environment-friendly surface sizing agent according to claim 2, wherein: the inside below of gear driven box (28) is provided with transverse gear (35), and driving motor (24) are connected with transverse gear (35) transmission through transfer line (26), the both sides of transverse gear (35) all are provided with vertical gear (36), and vertical gear (36) are connected with transverse gear (35) meshing, the one end of vertical gear (36) is provided with dwang (29), the outer wall of dwang (29) is provided with bottom stirring leaf (30), and bottom stirring leaf (30) are provided with a plurality of.

4. The apparatus for producing an environment-friendly surface sizing agent according to claim 1, wherein: the sizing agent reaction kettle is characterized in that a heat jacket (2) is arranged on the outer wall of the sizing agent reaction kettle body (1), a jacket input pipe (16) is arranged at one end of the heat jacket (2), a jacket output pipe (17) is arranged at the other end of the heat jacket (2), and a jacket temperature detector (5) is arranged on the front end face of the heat jacket (2).

5. The apparatus for producing an environment-friendly surface sizing agent according to claim 4, wherein: the steam-water heater is characterized in that a control valve (18) is arranged at one end of the jacket input pipe (16), a steam pipe (19) is arranged at one end of the control valve (18), a steam mechanism (20) is arranged at one end, far away from the control valve (18), of the steam pipe (19), a cold water pipe (21) is arranged at the other end of the control valve (18), a cold water machine (22) is arranged at one end, far away from the control valve (18), of the cold water pipe (21), and temperature controllers (23) are arranged on the outer walls of the cold water machine (22) and the steam mechanism (20).

6. The apparatus for producing an environment-friendly surface sizing agent according to claim 1, wherein: the two sides of the driving motor (24) are respectively provided with a feeding port (8) and a feeding port (10), one side of the feeding port (8) is provided with a pressure gauge (11), one side of the feeding port (10) is provided with a thermometer (12), and an ionic water storage tank (9) is arranged above the feeding port (8).

7. The apparatus for producing an environment-friendly surface sizing agent according to claim 1, wherein: the top of spraying layer (13) is provided with sealed head (3), the outer wall of sealed head (3) is provided with fixed screw (4), and fixed screw (4) are provided with a plurality of, a plurality of fixed screw (4) and sealed first (3) threaded connection.

8. The apparatus for producing an environment-friendly surface sizing agent according to claim 1, wherein: a feed opening (7) is formed in the middle of the lower portion of the sizing agent reaction kettle body (1), and supporting legs (6) are arranged on two sides of the feed opening (7).

9. The apparatus for producing an environment-friendly surface sizing agent according to claim 1, wherein: the outer walls of two sides of the sizing agent reaction kettle body (1) are provided with connecting pieces (34).

10. A process for producing an environment-friendly surface sizing agent, which is realized based on a production device of the environment-friendly surface sizing agent as claimed in any one of claims 1 to 9, and is characterized by comprising the following steps:

the method comprises the following steps: preparing a diluted starch solution, wherein 1410kg of starch granules and 8250kg of ionized water are continuously stirred and uniformly mixed for later use; 75kg of ammonium persulfate and 210kg of ionized water are mixed; 1.095kg of ferrous sulfate heptahydrate; + 45kg of ionized water; 1.095kg of ferrous sulfate heptahydrate and 45kg of ionized water; 585kg of glyoxal; 750kg of 35% liquid aluminum sulfate; 8250kg of ionized water is put in the kettle for standby;

step two: preparing an initiator and a monomer, and mixing 165kg of hydrogen peroxide and 600kg of ionized water; sequentially pumping 1725kg of styrene and 1185kg of butyl acrylate, and continuously and uniformly stirring for later use;

step three: opening an ionized water valve, adding ionized water into the reaction kettle, starting stirring, adding the diluted starch solution, opening a steam valve, introducing steam into a jacket of the reaction kettle, immediately stopping closing the valve to stop heating when the temperature in the kettle is raised to 48 ℃, adding ammonium persulfate at a constant temperature of 52 ℃, continuing heating the feed liquid in the reaction kettle to 90 ℃, and timing and keeping the temperature for 120 minutes when the temperature reaches 90 ℃;

step four: cooling to 85 ℃, adding ferrous sulfate heptahydrate, continuously stirring for 5 minutes, beginning to add 76.5kg of 10% hydrogen peroxide and 309.8kg of 10% monomer, then controlling the temperature to be 80-85 ℃, keeping the temperature for 15 minutes, beginning to simultaneously dropwise add the rest monomer and hydrogen peroxide after the heat preservation is finished, finishing the monomer dropwise adding within 120 minutes, finishing the hydrogen peroxide dropwise adding within 130 minutes, controlling the temperature in the dropwise adding process to be 80-85 ℃, and keeping the temperature at constant temperature for 90 minutes after the dropwise adding is finished;

step five: after the reaction kettle is finished, introducing cold water of a water cooler (22) into a jacket of the reaction kettle to reduce the temperature of the material liquid in the kettle to 60 ℃, adding glyoxal, stirring for 10 minutes, adding liquid aluminum sulfate, stirring for 10 minutes, cooling to below 50 ℃, filtering and discharging after stopping stirring, and cleaning the residual material on the wall of the kettle after discharging.

Technical Field

The invention relates to the technical field of surface sizing agent production, in particular to a production device and a production process of an environment-friendly surface sizing agent.

Background

The sizing agent is a papermaking additive, which mainly comprises internal sizing agent and surface sizing agent, wherein the sizing agent on paper can improve the water resistance, oil resistance, printing ink resistance and other performances of the paper, and can improve the smoothness, hydrophobicity and printing adaptability, and the internal sizing agent is roughly divided into three types of rosin sizing agent, synthetic sizing agent and neutral sizing agent. The surface sizing agent generally uses an anionic polymer.

However, the existing surface sizing agent production device is generally a reaction kettle, and after multiple production and preparation processes are carried out, the interior of the reaction kettle is difficult to clean completely, so that the problem that impurities are easy to remain on the inner wall to influence the subsequent production is solved; therefore, the existing requirements are not met, and an environment-friendly surface sizing agent production device and a production process thereof are provided for the requirements.

Disclosure of Invention

The invention aims to provide a production device and a production process of an environment-friendly surface sizing agent, and aims to solve the problem that the conventional surface sizing agent production device in the background art is generally a reaction kettle, and after multiple production and preparation processes are carried out, the interior of the reaction kettle is difficult to be completely cleaned, so that impurities are easily remained on the inner wall to influence the subsequent production.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an environment-friendly surface sizing agent's apparatus for producing, includes sizing agent reation kettle body, the top of sizing agent reation kettle body is provided with sprays the layer, the inside that sprays the layer is provided with sprays the raceway, the below that sprays the raceway is provided with the shower head, and the shower head is provided with a plurality of, the inner wall of sizing agent reation kettle body is provided with electronic pivot, and electronic pivot is provided with a plurality of, electronic pivot's outer wall is provided with adjustable fender, the outer wall of adjustable fender one end is provided with the magnetism wainscot, and adjustable fender's one end passes through magnetism wainscot and another the connection is inhaled to electronic pivot magnetism, the intermediate position department of sizing agent reation kettle body top is provided with driving motor.

Preferably, driving motor's output is provided with the shaft coupling, the lower extreme of shaft coupling is provided with the transfer line, driving motor's output passes through the shaft coupling and is connected with the transfer line transmission, the outer wall of transfer line is provided with the stirring leaf, and just stirs the leaf and be provided with a plurality of, the lower extreme of transfer line is provided with the gear driven box.

Preferably, the inside below of gear driven box is provided with transverse gear, and driving motor passes through the transfer line and is connected with transverse gear transmission, transverse gear's both sides all are provided with vertical gear, and vertical gear is connected with transverse gear engagement, vertical gear's one end is provided with the dwang, the outer wall of dwang is provided with bottom stirring leaf, and bottom stirring leaf is provided with a plurality of.

Preferably, the outer wall of the sizing agent reaction kettle body is provided with a heat jacket, one end of the heat jacket is provided with a jacket input pipe, the other end of the heat jacket is provided with a jacket output pipe, and the front end face of the heat jacket is provided with a jacket temperature detector.

Preferably, a control valve is arranged at one end of the jacket input pipe, a steam pipe is arranged at one end of the control valve, a steam mechanism is arranged at one end, away from the control valve, of the steam pipe, a cold water pipe is arranged at the other end of the control valve, a water cooling machine is arranged at one end, away from the control valve, of the cold water pipe, and temperature controllers are arranged on the outer walls of the water cooling machine and the steam mechanism.

Preferably, the both sides of driving motor are provided with pan feeding mouth and charge door respectively, one side of pan feeding mouth is provided with the pressure gauge, one side of charge door is provided with the thermometer, the top of pan feeding mouth is provided with the ionic water storage tank.

Preferably, the top on layer that sprays is provided with sealed head, the outer wall of sealed head is provided with the set screw, and the set screw is provided with a plurality of, a plurality of set screw and sealed first threaded connection.

Preferably, a feed opening is formed in the middle of the lower portion of the sizing agent reaction kettle body, and supporting legs are arranged on two sides of the feed opening.

Preferably, the outer walls of the two sides of the sizing agent reaction kettle body are provided with connecting pieces.

Preferably, the production process of the environment-friendly surface sizing agent comprises the following steps:

the method comprises the following steps: preparing a diluted starch solution, wherein 1410kg of starch granules and 8250kg of ionized water are continuously stirred and uniformly mixed for later use; 75kg of ammonium persulfate and 210kg of ionized water are mixed; 1.095kg of ferrous sulfate heptahydrate; + 45kg of ionized water; 1.095kg of ferrous sulfate heptahydrate and 45kg of ionized water; 585kg of glyoxal; 750kg of 35% liquid aluminum sulfate; 8250kg of ionized water is put in the kettle for standby;

step two: preparing an initiator and a monomer, and mixing 165kg of hydrogen peroxide and 600kg of ionized water; sequentially pumping 1725kg of styrene and 1185kg of butyl acrylate, and continuously and uniformly stirring for later use;

step three: opening an ionized water valve, adding ionized water into the reaction kettle, starting stirring, adding the diluted starch solution, opening a steam valve, introducing steam into a jacket of the reaction kettle, immediately stopping closing the valve to stop heating when the temperature in the kettle is raised to 48 ℃, adding ammonium persulfate at a constant temperature of 52 ℃, continuing heating the feed liquid in the reaction kettle to 90 ℃, and timing and keeping the temperature for 120 minutes when the temperature reaches 90 ℃;

step four: cooling to 85 ℃, adding ferrous sulfate heptahydrate, continuously stirring for 5 minutes, beginning to add 76.5kg of 10% hydrogen peroxide and 309.8kg of 10% monomer, then controlling the temperature to be 80-85 ℃, keeping the temperature for 15 minutes, beginning to simultaneously dropwise add the rest monomer and hydrogen peroxide after the heat preservation is finished, finishing the monomer dropwise adding within 120 minutes, finishing the hydrogen peroxide dropwise adding within 130 minutes, controlling the temperature in the dropwise adding process to be 80-85 ℃, and keeping the temperature at constant temperature for 90 minutes after the dropwise adding is finished;

step five: after the reaction kettle is finished, introducing cold water of a water chiller into a jacket of the reaction kettle to reduce the temperature of the material liquid in the kettle to 60 ℃, adding glyoxal, stirring for 10 minutes, adding liquid aluminum sulfate, stirring for 10 minutes, cooling to below 50 ℃, stopping stirring, filtering and discharging, and cleaning the residual material on the wall of the kettle after discharging.

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

1. the invention uses a plurality of electric rotating shafts and the movable baffle plates to form an annular surface at the inner wall, impurities generated in the internal stirring process are blocked on the premise that heat transfer and temperature reduction are not influenced, the internal stirring impurities act on the movable baffle plates, when the internal cleaning is needed, the spraying layer, the spraying water delivery pipe and the spraying head which are additionally arranged can be used for spraying, the electric rotating shafts drive the movable baffle plates to rotate in the spraying process, so that each baffle plate surface can be sprayed, cleaned and washed, the internal impurity treatment effect is improved, the problem that the subsequent production is influenced by impurity residues is avoided, after the cleaning is finished, the movable baffle plates can be driven by the electric rotating shafts to rotate to the original position to carry out reset operation, one end of the movable baffle plate during reset is provided with veneering magnetism and can be adsorbed at the outer wall of another electric rotating shaft, so that the movable baffle plates and the electric rotating shafts between each other can be tightly jointed, so that the sealing and shielding performance is improved.

2. Driving motor drives the transfer line and stirs the leaf and carry out the left right direction and rotate, and the pivoted transfer line drives the horizontal gear of below again and rotates, meshes the transmission with vertical gear during horizontal gear rotation for dwang and bottom stirring can be driven the rotation of going on the upper and lower direction, and the tilting can make the easy heavy end deposit in below can be stirred, and can form water impact with the rotation about of top, makes the mixed effect of inside stirring obtain improving.

3. The hot jacket is used for playing the effect of heat preservation and indirect heating, cooling, the inside temperature variation of cover is examined to the cover temperature of clamp, utilize the control valve can control intensification and cooling in-process inputted medium, steam mechanism and steam pipe are used for heating it with the mode of steam and intensifies, cold water machine and cold water pipe are used for cooling with the mode of cold water, the temperature of both is controlled by the temperature controller for sizing agent production reaction process temperature control effect is better.

Drawings

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

FIG. 2 is a schematic diagram of the internal structure of a sizing agent reaction kettle body according to the invention;

FIG. 3 is a schematic view of a partial structure of a spray layer according to the present invention;

FIG. 4 is a schematic view of a partial structure of the inner wall of a sizing agent reaction kettle body according to the present invention;

FIG. 5 is a partial schematic view of the gear driven box of the present invention;

FIG. 6 is a process flow diagram of the present invention;

in the figure: 1. a sizing agent reaction kettle body; 2. a heat jacket; 3. a sealing head; 4. fixing screws; 5. a jacket temperature detector; 6. supporting legs; 7. a feeding port; 8. a feeding port; 9. an ionized water storage tank; 10. a feed inlet; 11. a pressure gauge; 12. a thermometer; 13. a spray layer; 14. spraying a water conveying pipe; 15. a shower head; 16. a jacket input pipe; 17. jacket output pipes; 18. a control valve; 19. a steam pipe; 20. a steam mechanism; 21. a cold water pipe; 22. a water chiller; 23. a temperature controller; 24. a drive motor; 25. a coupling; 26. a transmission rod; 27. stirring blades; 28. a gear driven box; 29. rotating the rod; 30. a bottom stirring blade; 31. an electric rotating shaft; 32. a movable baffle; 33. magnetically sticking the surface; 34. a connecting member; 35. a transverse gear; 36. a vertical gear.

Detailed Description

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

Referring to fig. 1-6, an embodiment of the present invention is shown: the utility model provides an environment-friendly surface sizing agent's apparatus for producing, including sizing agent reation kettle body 1, sizing agent reation kettle body 1's top is provided with sprays layer 13, the inside that sprays layer 13 is provided with sprays raceway 14, the below that sprays raceway 14 is provided with shower head 15, and shower head 15 is provided with a plurality of, sizing agent reation kettle body 1's inner wall is provided with electronic pivot 31, and electronic pivot 31 is provided with a plurality of, electronic pivot 31's outer wall is provided with adjustable fender 32, the outer wall of adjustable fender 32 one end is provided with magnetism wainscot 33, and adjustable fender 32's one end is passed through magnetism wainscot 33 and is connected with another electronic pivot 31 magnetism, the intermediate position department of sizing agent reation kettle body 1 top is provided with driving motor 24.

Further, a coupler 25 is arranged at the output end of the driving motor 24, a transmission rod 26 is arranged at the lower end of the coupler 25, the output end of the driving motor 24 is in transmission connection with the transmission rod 26 through the coupler 25, a plurality of stirring blades 27 are arranged on the outer wall of the transmission rod 26, a gear driven box 28 is arranged at the lower end of the transmission rod 26, and the driving motor 24 drives the transmission rod 26 and the stirring blades 27 to rotate in the left-right direction.

Further, a transverse gear 35 is arranged below the inside of the gear driven box 28, the driving motor 24 is in transmission connection with the transverse gear 35 through a transmission rod 26, vertical gears 36 are arranged on two sides of the transverse gear 35, and the vertical gear 36 is meshed with the horizontal gear 35, one end of the vertical gear 36 is provided with a rotating rod 29, the outer wall of the rotating rod 29 is provided with a bottom stirring blade 30, and a plurality of bottom stirring blades 30 are arranged, the rotating transmission rod 26 drives the transverse gear 35 below to rotate, the transverse gear 35 is meshed with the vertical gear 36 for transmission when rotating, so that the rotating rod 29 and the bottom stirring blade 30 can be driven to rotate up and down, the up and down rotation can make the deposit which is easy to sink at the bottom can be turned over, and can form water impact with the left and right rotation of top for inside stirring mixes the effect and obtains improving.

Further, the outer wall of sizing agent reation kettle body 1 is provided with heat jacket 2, and the one end of heat jacket 2 is provided with presss from both sides the cover input tube 16, and the other end of heat jacket 2 is provided with presss from both sides the cover output tube 17, and the preceding terminal surface of heat jacket 2 is provided with presss from both sides the cover temperature detector 5, and heat jacket 2 is used for playing the heat preservation and indirectly heats, the effect of cooling, presss from both sides the inside temperature variation of cover that presss from both sides temperature detector 5 is used for detecting.

Further, one end of the jacket input pipe 16 is provided with a control valve 18, one end of the control valve 18 is provided with a steam pipe 19, one end of the steam pipe 19, which is far away from the control valve 18, is provided with a steam mechanism 20, the other end of the control valve 18 is provided with a cold water pipe 21, one end of the cold water pipe 21, which is far away from the control valve 18, is provided with a cold water machine 22, the outer walls of the cold water machine 22 and the steam mechanism 20 are both provided with temperature controllers 23, the control valve 18 can be used for controlling media input in the temperature rising and lowering process, the steam mechanism 20 and the steam pipe 19 are used for heating and raising the temperature in a steam mode, the cold water machine 22 and the cold water pipe 21 are used for lowering the temperature in a cold water mode, the temperatures of the two are controlled by the temperature controllers 23, and the temperature control effect in the sizing agent production reaction process is better.

Further, both sides of driving motor 24 are provided with pan feeding mouth 8 and charge door 10 respectively, and one side of pan feeding mouth 8 is provided with pressure gauge 11, and one side of charge door 10 is provided with thermometer 12, and the top of pan feeding mouth 8 is provided with ionic water storage tank 9, and thermometer 12 is used for detecting the temperature of inside, and the pressure gauge is used for detecting the pressure of inside.

Further, the top that sprays layer 13 is provided with sealed head 3, and the outer wall of sealed head 3 is provided with set screw 4, and set screw 4 is provided with a plurality of, a plurality of set screw 4 and 3 threaded connection of sealed head, and sealed head 3 department is used for improving the leakproofness of end department, and set screw 4 is used for strengthening the fixed sealed effect between the two.

Further, a feed opening 7 is arranged at the middle position below the sizing agent reaction kettle body 1, supporting legs 6 are arranged on two sides of the feed opening 7, the feed opening 7 is used for feeding, and the supporting legs 6 are used for supporting.

Further, the outer wall of sizing agent reation kettle body 1 both sides all is provided with connecting piece 34, and connecting piece 34 is used for using when removing reation kettle.

Further, the production process of the environment-friendly surface sizing agent comprises the following steps:

the method comprises the following steps: preparing a diluted starch solution, wherein 1410kg of starch granules and 8250kg of ionized water are continuously stirred and uniformly mixed for later use; 75kg of ammonium persulfate and 210kg of ionized water are mixed; 1.095kg of ferrous sulfate heptahydrate; + 45kg of ionized water; 1.095kg of ferrous sulfate heptahydrate and 45kg of ionized water; 585kg of glyoxal; 750kg of 35% liquid aluminum sulfate; 8250kg of ionized water is put in the kettle for standby;

step two: preparing an initiator and a monomer, and mixing 165kg of hydrogen peroxide and 600kg of ionized water; sequentially pumping 1725kg of styrene and 1185kg of butyl acrylate, and continuously and uniformly stirring for later use;

step three: opening an ionized water valve, adding ionized water into the reaction kettle, starting stirring, adding the diluted starch solution, opening a steam valve, introducing steam into a jacket of the reaction kettle, immediately stopping closing the valve to stop heating when the temperature in the kettle is raised to 48 ℃, adding ammonium persulfate at a constant temperature of 52 ℃, continuing heating the feed liquid in the reaction kettle to 90 ℃, and timing and keeping the temperature for 120 minutes when the temperature reaches 90 ℃;

step four: cooling to 85 ℃, adding ferrous sulfate heptahydrate, continuously stirring for 5 minutes, beginning to add 76.5kg of 10% hydrogen peroxide and 309.8kg of 10% monomer, then controlling the temperature to be 80-85 ℃, keeping the temperature for 15 minutes, beginning to simultaneously dropwise add the rest monomer and hydrogen peroxide after the heat preservation is finished, finishing the monomer dropwise adding within 120 minutes, finishing the hydrogen peroxide dropwise adding within 130 minutes, controlling the temperature in the dropwise adding process to be 80-85 ℃, and keeping the temperature at constant temperature for 90 minutes after the dropwise adding is finished;

step five: after the reaction kettle is finished, introducing cold water of a water chiller 22 into a jacket of the reaction kettle to cool the temperature of the material liquid in the kettle to 60 ℃, adding glyoxal, stirring for 10 minutes, adding liquid aluminum sulfate, stirring for 10 minutes, cooling to below 50 ℃, stopping stirring, filtering, discharging, and cleaning the residual material on the wall of the kettle after discharging.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.