Papermaking sewage zero discharge device and process method thereof

Abstract

The invention relates to the field of sewage treatment, in particular to a papermaking sewage zero-discharge device and a technological method.The papermaking sewage zero-discharge device comprises a flocculation basin and at least further comprises a first stirring part, a second stirring part and a third stirring part, the first stirring part is arranged in a first stirring pipe, and the first stirring part is used for conducting primary stirring on a flocculating agent entering the first stirring pipe; the plurality of spraying parts are arranged on the second stirring pipe, and the spraying parts are used for conveying a flocculating agent to each position in the flocculation basin; the plurality of second stirring parts are arranged in the spraying part, and the second stirring parts are used for carrying out secondary stirring on the flocculating agent entering the spraying part. According to the sewage treatment device, a flocculant is conveyed to each position of the flocculation basin by utilizing the spraying part to be in full contact with sewage, the sewage cleaning effect is improved, a flocculant solution is fully stirred and mixed through the first stirring part and the second stirring part, and the flocculation effect is further improved.

Description

Technical Field

[0001] The invention relates to the field of sewage treatment, and in particular to a papermaking sewage zero-discharge device and a process method thereof. Background Art

[0002] Papermaking wastewater refers to wastewater generated during the pulping and papermaking process, including pulping cooking wastewater, washing wastewater, bleaching wastewater and paper machine white water. Papermaking wastewater has complex composition and poor biodegradability. It is difficult to treat industrial wastewater and is one of the main industrial pollution sources in my country. Papermaking wastewater requires a series of zero-discharge sewage devices to purify it, and flocculation tank is one of them. Flocculation tank refers to a clean water tank that completes the flocculation process. It creates suitable hydraulic conditions for particles with flocculation properties to aggregate in mutual contact to form larger floccules (flocs). It plays an important role in water purification.

[0003] At present, the existing flocculation tank has the following defects when in use:

[0004] First, when the flocculant (mostly liquid) is injected into the flocculation tank, most of the flocculants are in strips, so only a small amount of sewage reacts with the surface of the flocculant. Although the stirring structure in the flocculation tank stirs and mixes the flocculant in the sewage, it does not break up the flocculant in time. The flocculant still takes a long time to diffuse to all parts of the flocculation tank, which reduces the sewage treatment efficiency.

[0005] Secondly, in some cases, it is necessary to mix multiple flocculants together. When the flocculants are directly added to the flocculation tank, there may be uneven mixing between the multiple flocculants. The stirring structure in the flocculator can only mix the sewage and the flocculant, and cannot fully mix the multiple flocculants evenly, resulting in poor flocculation effect of the flocculant, further reducing the sewage treatment efficiency. In view of this, we propose a papermaking wastewater zero discharge device and a process method thereof. Summary of the invention

[0006] The purpose of the present invention is to provide a papermaking wastewater zero discharge device and a process method thereof to solve the problems raised in the above background technology.

[0007] In order to solve the above technical problems, one of the purposes of the present invention is to provide a zero-discharge device for papermaking wastewater, including a flocculation tank, a first water conduit and a second water conduit are symmetrically connected on both sides of the flocculation tank, a motor is fixedly installed on the top of the flocculation tank through a mounting plate, a rotating shaft is fixedly installed at the output end of the motor through the mounting plate, a first stirring tube is fixedly installed at the bottom end of the rotating shaft, a plurality of evenly distributed second stirring tubes are fixedly installed on the surface of the first stirring tube, and at least the following are included:

[0008] a first stirring part, the first stirring part is arranged in the first stirring tube, and the first stirring part is used to initially stir the flocculant entering the first stirring tube;

[0009] A plurality of ejection parts, each of which is disposed on the second stirring tube and is used to transport the flocculant to various positions in the flocculation tank;

[0010] A plurality of second stirring parts are provided in the ejection part, and the second stirring parts are used for secondary stirring of the flocculant entering the ejection part.

[0011] Preferably, a liquid inlet pipe is rotatably provided at the bottom end of the first stirring tube, a plurality of liquid inlet holes are opened on the surface of the liquid inlet pipe, and a support frame fixedly matched with the bottom of the inner wall of the flocculation tank is fixed at the center of the liquid inlet pipe.

[0012] Preferably, the first stirring part comprises a connecting shaft whose two ends are rotatably matched with the top of the inner wall of the first stirring tube and the top of the liquid inlet tube respectively, and a plurality of impellers are fixedly provided on the surface of the connecting shaft.

[0013] Preferably, the ejection portion comprises an infusion tube fixedly connected to the bottom of the second stirring tube, and a one-way valve is fixedly provided on the surface of the infusion tube.

[0014] Preferably, the bottom end of the infusion tube is fixedly connected to a spray box, the outer wall of the spray box is fixedly connected to a plurality of spray tubes, and the end surface of the spray tube is provided with a plurality of spray holes facing in different directions.

[0015] Preferably, a rubber cover in contact with the ejection hole is hingedly provided on the surface of the ejection pipe.

[0016] Preferably, the second stirring part includes a transmission shaft rotatably matched with the bottom of the spray box, a turntable is fixedly provided on the top of the transmission shaft through the spray box, a conical platform is fixedly provided at the center of the top of the turntable, and a plurality of arc-shaped pieces are fixedly provided on the outer ring of the top of the turntable.

[0017] Preferably, a plurality of stirring blades are fixedly provided on the surface of the transmission shaft.

[0018] The second object of the present invention is to provide a process method for a zero-discharge device for papermaking wastewater, which is applied to any one of the zero-discharge devices for papermaking wastewater described above, and comprises the following steps:

[0019] S1: Discharge the papermaking wastewater to be flocculated into the flocculation tank through the first water pipe until the papermaking wastewater submerges the first stirring tube and the second stirring tube;

[0020] S2: starting the motor to drive the first stirring tube and the second stirring tube to rotate, stirring the papermaking wastewater;

[0021] S3: Discharge the flocculant solution into the first stirring tube through the liquid inlet pipe, the flocculant drives the impeller and the connecting shaft to rotate, and flows along the first stirring tube and the second stirring tube;

[0022] S4: The flocculant flows into the spray box through the infusion tube, and the flocculant is sprayed on the cone table, flows downward along the cone table, and impacts the arc sheet;

[0023] S5: The flocculant solution flows into multiple spray pipes, breaks the rubber cover, and is dispersed to all directions in the flocculation tank;

[0024] S6: After waiting for the flocculation to be completed, the flocculated papermaking wastewater is discharged from the flocculation tank via the second water pipe.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. In the papermaking wastewater zero-discharge device and the process method thereof, the flocculant is transported to various positions of the flocculation tank through the ejection part to fully contact with the wastewater, which is beneficial to improving the wastewater cleaning effect. The flocculant solution is fully stirred and mixed through the first stirring part and the second stirring part, further improving the flocculation effect;

[0027] The flocculant flows in the first stirring tube and the second stirring tube, falls along the conical platform, and is sprayed out from multiple spray pipes. The flocculant is dispersed multiple times, so that the flocculant is transported to various positions in the flocculation tank, which is beneficial for the flocculant to fully contact with the papermaking wastewater and improve the wastewater treatment efficiency.

[0028] 2. In the papermaking wastewater zero discharge device and its process method, the flocculant flows into the first stirring tube through the liquid inlet hole in strands, and the first stirring tube and the second stirring tube rotate to drive the flocculant to rotate and mix, and then are mixed by the impeller, and finally fall along the conical table to impact the arc piece, driving the arc piece to rotate, and the arc piece stirs the flocculant again. The flocculant is mixed and stirred for many times, which significantly improves the mixing uniformity between multiple flocculants, enhances the flocculation effect, and is beneficial to improving the sewage treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 It is a schematic diagram of the connection structure of the first stirring tube, the second stirring tube and the ejection part of the present invention;

[0031] Figure 3 It is a partial structural cross-sectional view of the present invention as a whole;

[0032] Figure 4 It is a schematic diagram of the connection structure of the first stirring tube, the second stirring tube, the liquid inlet tube and the support frame of the present invention;

[0033] Figure 5 It is a structural schematic diagram of the ejection part of the present invention;

[0034] Figure 6 is a schematic structural diagram of the second stirring part of the present invention;

[0035] Figure 7 It is a schematic structural diagram of the first stirring part of the present invention;

[0036] Figure 8 It is a structural schematic diagram of the liquid inlet pipe of the present invention;

[0037] Fig. 9 It is a schematic diagram of the structure of the ejection pipe of the present invention;

[0038] Fig.10 For the present invention Figure 3 A partial enlarged view of the middle part;

[0039] Fig.11 For the present invention Figure 3 A partial enlarged view of point B in the middle.

[0040] The meaning of each number in the figure is:

[0041] 1. Flocculation tank; 2. Motor; 3. First stirring tube; 4. Second stirring tube; 5. First agitating part; 51. Connecting shaft; 52. Impeller; 6. Ejection part; 61. Infusion tube; 62. One-way valve; 63. Ejection box; 64. Ejection tube; 65. Ejection hole; 66. Rubber cover; 7. Second agitating part; 71. Transmission shaft; 72. Turntable; 73. Conical table; 74. Arc sheet; 75. Agitating blade; 8. Liquid inlet pipe; 9. Liquid inlet hole; 10. Support frame. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] Example 1

[0044] like Figure 1-11As shown, one of the purposes of the present invention is to provide a zero-discharge device for papermaking wastewater, including a flocculation tank 1, wherein a first water conduit and a second water conduit are symmetrically connected on both sides of the flocculation tank 1, a motor 2 is fixedly installed on the top of the flocculation tank 1 through a mounting plate, a rotating shaft is fixedly installed at the output end of the motor 2 through the mounting plate, a first stirring tube 3 is fixedly installed at the bottom end of the rotating shaft, a plurality of evenly distributed second stirring tubes 4 are fixedly installed on the surface of the first stirring tube 3, and at least the following are included:

[0045] a first stirring part 5, wherein the first stirring part 5 is disposed in the first stirring tube 3, and the first stirring part 5 is used for initially stirring the flocculant entering the first stirring tube 3;

[0046] A plurality of ejection parts 6, wherein the ejection parts 6 are arranged on the second stirring tube 4, and the ejection parts 6 are used to transport the flocculant to various positions in the flocculation tank 1;

[0047] A plurality of second stirring parts 7, wherein the second stirring parts 7 are arranged in the ejection part 6, and the second stirring parts 7 are used for secondary stirring of the flocculant entering the ejection part 6;

[0048] The present invention Figure 1 As shown, considering that when the flocculant is added to the flocculation tank 1, it is not dispersed, but injected into the flocculation tank 1 in streams, resulting in only a small amount of sewage that contacts the flocculant to react with the flocculant, and a large amount of flocculant needs to be subsequently stirred and dispersed to various positions inside the flocculation tank 1 before it can react with other sewage, which reduces the sewage treatment effect. Therefore, Figure 2-3 and Figure 5 As shown, through the ejection part 6, the flocculant entering the first stirring tube 3 first flows along the inside of the first stirring tube 3 and the second stirring tube 4, so that the flocculant moves to the output end of each second stirring tube 4, and the flocculant reaching the output end of the second stirring tube 4 enters the ejection part 6, and the flocculant is then ejected to all directions in the flocculation tank 1 through the ejection part 6, so that the flocculant enters the flocculation tank 1 and contacts with the sewage at various positions in the flocculation tank 1 to react, which is beneficial to improving the sewage treatment efficiency;

[0049] In some cases, it is necessary to mix multiple flocculants together. At this time, it is possible that the mixed solution of multiple flocculants is not mixed sufficiently, reducing the mixing uniformity of the solution and weakening the flocculation effect of the flocculant. Therefore, Figure 6-7As shown, through the first stirring part 5 and the second stirring part 7, when the flocculant first enters the first stirring tube 3, it flows through and drives the first stirring part 5 to rotate, and the flocculant is initially stirred by the first stirring part 5. When the flocculant leaves the second stirring tube 4 and enters the inside of the ejection part 6, it drives the second stirring part 7 to rotate, and the flocculant is secondarily stirred by the second stirring part 7, so that the mixed solution composed of multiple flocculants is stirred more fully, and the mixing uniformity of the solution is improved, which is conducive to giving full play to the flocculation function of the flocculant and improving the sewage treatment efficiency.

[0050] On the basis of the above, the specific structure is disclosed in detail: Considering that the flocculant needs to be introduced into the first stirring tube 3, flows through the first stirring tube 3 and the second stirring tube 4 to reach various positions in the flocculation tank 1, it is necessary to explain how the flocculant enters the first stirring tube 3. Therefore, Fig.11 As shown, a liquid inlet pipe 8 is rotatably provided at the bottom end of the first stirring tube 3, and a plurality of liquid inlet holes 9 are opened on the surface of the liquid inlet pipe 8. A support frame 10 fixedly provided at the center of the liquid inlet pipe 8 and fixedly matched with the bottom of the inner wall of the flocculation tank 1, the support frame 10 is fixed inside the flocculation tank 1, and the liquid inlet pipe 8 is fixed and limited, so that the structural stability of the first stirring tube 3 and the second stirring tube 4 is stronger when they are rotated, and the flocculant flows from the external environment through the liquid inlet pipe 8 through the liquid inlet hole 9, and then sprayed out from the liquid inlet hole 9, so as to stably input the flocculant into the first stirring tube 3, and a stream of flocculant is divided into multiple streams of flocculant when leaving the liquid inlet pipe 8 through multiple liquid inlet holes 9, and the multiple streams of flocculant are mixed again after entering the first stirring tube 3, which plays a role in mixing the flocculant solution to a certain extent, which is beneficial to improving the mixing uniformity of the flocculant solution.

[0052] Considering that the flocculant enters the first stirring tube 3 through the liquid inlet pipe 8 and is stirred by the first stirring part 5, so that the flocculant solution is mixed more evenly, it is necessary to disclose the specific structure of the first stirring part 5. Figure 3 and Figure 7 As shown, the first stirring part 5 includes a connecting shaft 51 whose two ends are rotatably matched with the top of the inner wall of the first stirring tube 3 and the top of the liquid inlet pipe 8 respectively. A plurality of impellers 52 are fixedly provided on the surface of the connecting shaft 51. Through the connecting shaft 51 and the impeller 52, when the flocculant flows through the impeller 52, the impeller 52 is driven to rotate with the connecting shaft 51 as the axis. When the impeller 52 rotates, the flocculant is driven to rotate, so that the flocculant is fully collided and mixed inside the first stirring tube 3, thereby improving the mixing uniformity of the flocculant and enhancing the flocculation effect of the flocculant.

[0053] Considering that when the flocculant reaches the second stirring tube 4, it is necessary to spray the flocculant to all directions in the flocculation tank 1 through the spraying part 6 so that the flocculant is fully in contact with the papermaking wastewater, it is necessary to explain how the flocculant enters the spraying part 6 from the second stirring tube 4. Therefore, Figure 5 As shown, the ejection part 6 includes an infusion tube 61 fixedly connected to the bottom of the second stirring tube 4, and a one-way valve 62 is fixedly provided on the surface of the infusion tube 61. Through the infusion tube 61 and the one-way valve 62, the flocculant flowing through the second stirring tube 4 enters the ejection part 6 from the infusion tube 61, and the one-way valve 62 only allows the flocculant to flow into the ejection part 6, so that the flocculant will not flow back into the second stirring tube 4.

[0054] In order to make the flocculant entering the ejection part 6 through the liquid delivery tube 61 fully dispersed to all directions in the flocculation tank 1 when leaving the ejection part 6, it is necessary to explain the structure in the ejection part 6 that can disperse the flocculant in all directions. Figure 5 As shown, the bottom end of the infusion tube 61 is fixedly connected to a spray box 63, and the outer wall of the spray box 63 is fixedly connected to a plurality of spray pipes 64, and the end face of the spray pipe 64 is provided with a plurality of spray holes 65 with different directions. The flocculant flows through the infusion tube 61 into the spray box 63 through the spray box 63 and the spray pipe 64, and the spray box 63 collects the flocculant in a centralized manner. Then the flocculant flows through the plurality of spray pipes 64 again, and is sprayed from the spray holes 65 with different directions to all directions in the flocculation tank 1, which is beneficial for the flocculant to fully contact with the papermaking wastewater and improve the wastewater treatment effect.

[0055] Among them, when the flocculant is added and no more flocculant is needed, in order to prevent the flocculants and sewage generated by the flocculants and the sewage from flowing back to the ejection box 63 and causing the ejection pipe 64 to be blocked, it is necessary to explain the structure in the ejection part 6 that can prevent the flocculants and sewage from flowing back to the ejection pipe 64. Therefore, if Figure 5 As shown, a rubber cover 66 in contact with the ejection hole 65 is hingedly provided on the surface of the ejection pipe 64. The rubber cover 66 covers the ejection hole 65, so that flocculants and sewage will not flow back into the ejection pipe 64 and the ejection box 63, thereby avoiding blockage inside the ejection box 63 and the ejection pipe 64, ensuring that the next ejection of the flocculant will not be hindered. When the flocculant is ejected from the ejection pipe 64 and impacts the rubber cover 66, since the rubber cover 66 will not be immediately flushed open, it also plays a role in blocking the flocculant to a certain extent, thereby further expanding the dispersion range of the flocculant.

[0056] Considering that the connecting shaft 51 and the impeller 52 have already sufficiently stirred and mixed the flocculant, stirring and mixing the flocculant again through the second stirring part 7 can further improve the mixing uniformity of the flocculant solution, which is more conducive to enhancing the sewage treatment effect, it is necessary to explain how the second stirring part 7 stirs and mixes the flocculant for the second time inside the spray box 63. Therefore, Figure 6 and Fig.10As shown, the second stirring part 7 includes a transmission shaft 71 which is rotatably matched with the bottom of the spray box 63. A turntable 72 is fixedly provided on the top of the transmission shaft 71 through the spray box 63. A conical platform 73 is fixedly provided at the center of the top of the turntable 72. A plurality of arcuate sheets 74 are fixedly provided on the outer ring of the top of the turntable 72. The flocculant entering the spray box 63 through the conical platform 73 and the arcuate sheets 74 first falls on the top of the conical platform 73, and flows downward along the inclined surface of the conical platform 73. The flocculant is divided into multiple strands and impacts the arcuate sheets 74, driving the arcuate sheets 74 and the turntable 72 to rotate with the transmission shaft 71 as the axis. While the arcuate sheets 74 rotate, the flocculant is mixed and stirred again, so as to further improve the mixing uniformity of the flocculant, which is beneficial to further enhance the sewage treatment effect.

[0057] In order to stir the flocculant sprayed from the spray pipe 64 in time and make the flocculant react with the papermaking wastewater as soon as possible, the power generated by the rotation of the transmission shaft 71 can be used to achieve this purpose. Therefore, the specific structure for achieving this purpose needs to be disclosed. Figure 6 As shown, a plurality of stirring blades 75 are fixedly provided on the surface of the transmission shaft 71. Through the stirring blades 75, the arc-shaped piece 74 and the turntable 72 rotate to drive the transmission shaft 71 to rotate, and then drive the plurality of stirring blades 75 to rotate with the transmission shaft 71 as the axis, so as to timely stir the flocculant sprayed from the spray pipe 64, which is beneficial to improving the sewage treatment effect.

[0058] The second object of the present invention is to provide a process method for a zero-discharge device for papermaking wastewater, which is applied to any one of the above-mentioned zero-discharge devices for papermaking wastewater, and comprises the following steps:

[0059] S1: Discharge the papermaking wastewater to be flocculated into the flocculation tank 1 through the first water pipe until the papermaking wastewater submerges the first stirring tube 3 and the second stirring tube 4;

[0060] S2: starting the motor 2 to drive the first stirring tube 3 and the second stirring tube 4 to rotate, stirring the papermaking wastewater;

[0061] S3: The flocculant solution is discharged into the first stirring tube 3 through the liquid inlet pipe 8, and the flocculant drives the impeller 52 and the connecting shaft 51 to rotate, and flows along the first stirring tube 3 and the second stirring tube 4;

[0062] S4: The flocculant flows into the spray box 63 through the infusion tube 61, and the flocculant is sprayed on the conical platform 73, flows downward along the conical platform 73, and impacts the arc-shaped sheet 74;

[0063] S5: The flocculant solution flows into the multiple spray pipes 64, breaks the rubber cover 66, and is dispersed to all directions in the flocculation tank 1;

[0064] S6: After waiting for the flocculation to be completed, the flocculated papermaking wastewater is discharged from the flocculation tank 1 through the second water pipe.

[0065] Working principle: When it is necessary to perform flocculation operation on the sewage in the flocculation tank 1, the papermaking sewage waiting for flocculation is discharged into the flocculation tank 1 through the first water pipe until the papermaking sewage submerges the first stirring tube 3 and the second stirring tube 4, and the motor 2 is started to drive the rotating shaft to rotate, thereby driving the first stirring tube 3 and the second stirring tube 4 to rotate. At this time, the flocculant solution is pumped into the liquid inlet pipe 8 through the external pump body, and the flocculant flows through the liquid inlet pipe 8 and is sprayed from the liquid inlet hole 9 to the first stirring tube 3. The flocculant continues to flow in the first stirring tube 3 and drives the connecting shaft 5 1 and the impeller 52 rotate, the flocculant continues to flow into the second stirring tube 4, and then flows through the infusion tube 61 into the ejection box 63. The flocculant entering the ejection box 63 first impacts on the conical platform 73, flows downward along the inclined surface of the conical platform 73, and continues to impact the arc-shaped sheet 74, so that the arc-shaped sheet 74 rotates, and the flocculant that is dispersed and mixed again is ejected from the ejection tube 64. After being ejected, the flocculant reaches various positions in the flocculation tank and is immediately stirred by the first stirring tube 3, the second stirring tube 4 and the stirring blades 75 to fully react with the papermaking wastewater.

[0066] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A papermaking wastewater zero discharge device, comprising a flocculation tank (1), wherein a first water conduit and a second water conduit are symmetrically connected on both sides of the flocculation tank (1), a motor (2) is fixedly installed on the top of the flocculation tank (1) through a mounting plate, a rotating shaft is fixedly installed at the output end of the motor (2) through the mounting plate, a first stirring tube (3) is fixedly installed at the bottom end of the rotating shaft, and a plurality of evenly distributed second stirring tubes (4) are fixedly installed on the surface of the first stirring tube (3), characterized in that: At least: A first stirring part (5), the first stirring part (5) is arranged in the first stirring tube (3), and the first stirring part (5) is used to initially stir the flocculant entering the first stirring tube (3); A plurality of ejection parts (6), wherein the ejection parts (6) are arranged on the second stirring tube (4), and the ejection parts (6) are used to transport the flocculant to various positions in the flocculation tank (1); A plurality of second stirring parts (7), wherein the second stirring parts (7) are arranged in the ejection part (6), and the second stirring parts (7) are used to perform secondary stirring on the flocculant entering the ejection part (6).

2. The papermaking wastewater zero discharge device according to claim 1 is characterized in that: A liquid inlet pipe (8) is rotatably provided at the bottom end of the first stirring tube (3), a plurality of liquid inlet holes (9) are provided on the surface of the liquid inlet pipe (8), and a support frame (10) fixedly matched with the bottom of the inner wall of the flocculation tank (1) is fixedly provided at the center of the liquid inlet pipe (8).

3. The papermaking wastewater zero discharge device according to claim 2 is characterized in that: The first stirring portion (5) comprises a connecting shaft (51) having two ends respectively rotatably matched with the top of the inner wall of the first stirring tube (3) and the top of the liquid inlet tube (8), and a plurality of impellers (52) are fixedly provided on the surface of the connecting shaft (51).

4. The papermaking wastewater zero discharge device according to claim 3 is characterized in that: The ejection portion (6) comprises a liquid infusion tube (61) fixedly connected to the bottom of the second stirring tube (4), and a one-way valve (62) is fixedly provided on the surface of the liquid infusion tube (61).

5. The papermaking wastewater zero discharge device according to claim 4 is characterized in that: The bottom end of the infusion tube (61) is fixedly connected to a spray box (63), the outer wall of the spray box (63) is fixedly connected to a plurality of spray tubes (64), and the end surface of the spray tube (64) is provided with a plurality of spray holes (65) facing in different directions.

6. The papermaking wastewater zero discharge device according to claim 5 is characterized in that: The surface of the ejection pipe (64) is hingedly provided with a rubber cover (66) in contact with the ejection hole (65).

7. The papermaking wastewater zero discharge device according to claim 6 is characterized in that: The second stirring portion (7) comprises a transmission shaft (71) rotatably matched with the bottom of the spray box (63); a turntable (72) is fixedly provided at the top end of the transmission shaft (71) through the spray box (63); a conical platform (73) is fixedly provided at the center of the top of the turntable (72); and a plurality of arc-shaped sheets (74) are fixedly provided at the outer ring of the top of the turntable (72).

8. The papermaking wastewater zero discharge device according to claim 7 is characterized in that: A plurality of stirring blades (75) are fixedly provided on the surface of the transmission shaft (71).

9. A process method for a zero-discharge device for papermaking wastewater, applied to the zero-discharge device for papermaking wastewater as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: S1: Discharging the papermaking wastewater to be flocculated into the flocculation tank (1) via the first water pipe until the papermaking wastewater submerges the first stirring tube (3) and the second stirring tube (4); S2: starting the motor (2) to drive the first stirring tube (3) and the second stirring tube (4) to rotate and stir the papermaking wastewater; S3: a flocculant solution is discharged into the first stirring tube (3) through the liquid inlet pipe (8), the flocculant drives the impeller (52) and the connecting shaft (51) to rotate, and flows along the first stirring tube (3) and the second stirring tube (4); S4: The flocculant flows into the spray box (63) through the infusion tube (61), and the flocculant is sprayed on the conical platform (73), flows downward along the conical platform (73), and impacts the arc-shaped sheet (74); S5: The flocculant solution flows into the multiple spray pipes (64), breaks the rubber cover (66), and is dispersed to all directions in the flocculation tank (1); S6: After waiting for the flocculation to be completed, the flocculated papermaking wastewater is discharged from the flocculation tank (1) via the second water pipe.

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