Retention aid dosing online dissolving equipment

Abstract

The invention discloses retention aid dosing on-line dissolving equipment. The retention aid dosing on-line dissolving equipment comprises a rack and a fluid conveying pipeline provided with an external water source, the feeding bin is mounted on the rack; the material mixing assembly comprises a material mixing bin installed on the machine frame, a water inlet pipeline and a water outlet pipeline, the water inlet pipeline and the water outlet pipeline are both communicated with the material mixing bin, the water inlet pipeline and the water outlet pipeline are both communicated with the fluid conveying pipeline, the material mixing bin is communicated with the output end of the feeding bin, and incident water flow of the water inlet pipeline is basically tangent to the inner wall of the material mixing bin; the tangential incident water flow forms spiral turbulent flow in the mixing bin, and the retention aid particles are forcibly dispersed by centrifugal force and roll along the wall surface, so that the formation condition of micelles is fundamentally destroyed. Compared with a traditional stirring mode, the dynamic shearing force is more uniform and continuous in effect, and the caking problem caused by too high local concentration is avoided. The collaborative design of the conical mixing bin and the spiral guide sheet further optimizes the water flow path, so that the particles are fully disturbed in a small space, and the dissolution contact area is obviously increased.

Description

Technical Field

[0001] The present application relates to the technical field of cotton tissue production, and in particular to an online dissolution device for adding a retention aid. Background Art

[0002] Retention aids are added during the production of cotton tissue to increase the retention rate of fibers and fillers, reduce raw material loss, and optimize the uniformity and strength of paper. Commonly used retention aids include polyacrylamide and cationic starch. Traditional retention aid dissolution usually adopts manual addition or simple stirring equipment, which has the following technical defects: 1. The retention agent is easy to form "fish-eye" shaped micelles due to too fast addition or insufficient stirring. After the outer layer is dissolved, the inner part is still a hard lump, resulting in incomplete dissolution and reduced utilization of effective ingredients; 2. Insufficiently dissolved retention aid particles are prone to deposit in the dosing pipe or pump, causing blockage, requiring frequent shutdowns for cleaning, and affecting production continuity; 3. Lack of adaptability to the high viscosity and easy agglomeration characteristics of retention aids; Therefore, it is urgent to develop an online dissolution equipment for dosing retention aids to solve the problems of agglomeration and caking by optimizing the feeding, dispersion, and dissolution environments. Summary of the invention

[0003] The purpose of the present application is to provide an on-line dissolution device for dosing a retention aid, in order to solve the problem of agglomeration and caking of the retention aid.

[0004] The present application provides an online dissolution device for adding a retention aid, which adopts the following technical solution: it includes a frame, on which a fluid conveying pipeline connected to an external water source is installed; a feeding bin installed on the frame; a mixing assembly, including a mixing bin installed on the frame, an inlet pipe and an outlet pipe both connected to the mixing bin, the inlet pipe and the outlet pipe both connected to the fluid conveying pipeline, the mixing bin is connected to the output end of the feeding bin, and the incident water flow of the inlet pipe is basically tangent to the inner wall of the mixing bin; wherein, when the retention aid in the feeding bin is added to the mixing assembly, the incident water flow will spirally convey the retention aid along the inner wall of the mixing bin.

[0005] By adopting the above technical solution, the tangentially incident water flow forms a spiral turbulent flow in the mixing bin. The retention aid particles are forced to disperse and roll along the wall surface by centrifugal force, effectively destroying the formation conditions of the micelles, and improving the dissolution uniformity compared with the traditional stirring method. Secondly, the design of continuous scouring by the dynamic water flow avoids particle deposition. The direct connection of the inlet pipe and the outlet pipe to the main conveying pipe forms a closed-loop system, enabling the undissolved particles to be recycled and reducing the pipeline blockage rate. Moreover, the collaborative work of the mixing bin and the feeding bin realizes the on-line continuous operation of feeding-dispersing-dissolving. By controlling the water flow rate, sufficient shear force is ensured while viscosity loss is prevented, improving the effective utilization rate of retention aids such as cationic starch.

[0006] Preferably, the feeding bin includes an outer bin, a sieve plate, and a screw conveying assembly. The sieve plate is arranged inside the outer bin and longitudinally divides the inside of the outer bin into a feeding area and a screening area. The screw conveying assembly is located at the output end of the screening area.

[0007] By adopting the above technical solution, the longitudinal zoning design of the outer bin and the sieve plate realizes the pre-screening function of the raw materials. Large particle agglomerates are intercepted in the feeding area and gradually broken, while the particles meeting the particle size requirements enter the screening area, reducing the generation probability of micelles from the source. Through controllable mechanical conveying, it is ensured that the retention aid enters the mixing assembly at a constant rate, avoiding local agglomeration caused by instantaneous overfeeding and forming a dynamic cooperation with the tangential water flow.

[0008] Preferably, the screw conveying assembly includes a first power source installed on the frame, a connector connected to the output end of the first power source, a screw group and a first shaft respectively connected to the output end of the connector. The input end of the screw group is communicated with the screening area, and the output end is communicated with the mixing bin. The first shaft penetrates the side wall of the outer bin and extends into the screening area.

[0009] By adopting the above technical solution, the first power source synchronously drives the screw group and the first shaft to rotate through the connector, forming a mechanical linkage system to ensure the continuous and stable conveying process of the retention aid from the screening area to the mixing bin. The spiral propulsion structure of the screw group can generate uniform shear force on the retention aid, further breaking the tiny micelles during the conveying process and preventing particle re-aggregation.

[0010] Preferably, an inner bin is arranged in the screening area. The inner bin is located between the sieve plate and the screw conveying assembly. The inner bin can slide longitudinally relative to the outer bin. The inner bin is provided with an inclined wall and an inclined plate fixedly connected. Both the inclined wall and the inclined plate are arranged between the input end and the output end of the inner bin.

[0011] By adopting the above technical solution, the inner bin can move relative to the outer bin. When the material falls through the sieve plate, the movement of the inner bin will drive the inclined plate and the inclined wall to move. This will cause the inclined plate and the inclined wall to impact the falling material, which will further disperse the falling small lumps. Moreover, the longitudinal movement of the inner bin can loosen the material accumulated at the bottom of the outer bin, preventing the material from piling up at the bottom of the outer bin. The inclined wall and the inclined plate also have the effect of guiding the material, preventing the material from falling in a more uniform area.

[0012] Preferably, a stepped portion is provided at the bottom end of the inner bin. A roller is installed on the stepped portion. The first shaft is fixedly connected to a cam, and the cam abuts against the roller. A through groove is provided at the bottom end of the inner bin. The first shaft passes through the through groove. The first shaft is fixedly connected to a baffle, and the baffle abuts against one side of the through groove. A dial rod is installed on the baffle.

[0013] By adopting the above technical solution, the longitudinal movement of the inner bin is realized by using a cam mechanism. The roller can reduce the friction between the cams. The baffle can block the through groove to prevent the material from entering through the through groove.

[0014] Preferably, the outer bin is fixedly connected with a plurality of struts. The sieve plate is installed on the struts. A first spring is installed on the struts. The first spring forces the sieve plate to move downward. The inner bin is fixedly connected with a cross bar. The cross bar is fixedly connected with a first rod. A second rod nested with the first rod is fixedly connected to the sieve plate. A second spring is provided between the first rod and the second rod.

[0015] By adopting the above technical solution, the first rod and the second rod are used as force transmission components, which can transmit the directional movement of the inner bin to the sieve plate, enabling the sieve plate to screen the material. On the one hand, the first spring and the second spring can shorten the amplitude of vibration, preventing the sieve plate from vibrating the material out due to excessive vibration amplitude. On the other hand, they can change the vibration efficiency of the sieve plate, causing a time difference in vibration between the sieve plate and the inner bin, and enabling the material to better impact the inclined plate and the inclined wall, thereby achieving dispersion.

[0016] Preferably, the fluid delivery pipe is respectively provided with a first connection part and a second connection part connected to the water inlet pipe and the water outlet pipe. The angles formed by the axis of the first connection part, the axis of the second connection part and the axis of the fluid delivery pipe are less than or equal to 90°.

[0017] By adopting the above technical solution, part of the water flow in the fluid transport pipeline will enter the mixing bin through the water inlet pipe, and will form a spiral downward water column along the inner wall of the mixing bin. The spiral water column will carry the material to move and fully dissolve the material; secondly, the flow rate of the fluid transport pipeline is greater than the water outlet pipe. According to the Bernoulli principle, the water outlet pipe will generate negative pressure, which is convenient for the water flow to be discharged after dissolution; compared with the traditional dissolution by stirring directly in the tank, the dissolution effect of this application is better. The solvent of the traditional dissolution method remains unchanged. As the material dissolves, the overall dissolution effect will decrease. The solvent of this application is continuously provided, and it is a continuous small batch dissolution, and the overall dissolution effect remains unchanged.

[0018] Preferably, the mixing bin is provided with a cone and a connecting portion, the connecting portion is connected to the output end of the feeding bin, the large circular end of the cone is located at the top, the small circular end is located at the bottom, the water inlet channel is close to the large circular end, and the water outlet channel is close to the small circular end.

[0019] By adopting the above technical solution, the water inlet channel is arranged at a higher height than the water outlet channel, which conforms to the natural law of water flowing from top to bottom and makes it easier for the water flow to form a spiral downward water flow on the inner wall of the mixing bin.

[0020] Preferably, the cone portion is fixedly connected with a guide piece, and the guide piece spirals downward along the inner wall of the cone portion.

[0021] By adopting the above technical solution, the guide plate allows the water flow to better form a spiral downward water flow on the one hand, and on the other hand, it receives the material and mixes it better with the water flow; the material and the water flow can be better and more fully contacted in a small space, so that the dissolution effect is better, and the material disturbance effect is more obvious when flowing in a small space, and the material dissolution effect is better.

[0022] Preferably, the guide piece includes an arc portion and an inclined portion, the arc portion is close to the inner wall of the cone portion, and the inclined portion is located higher than the arc portion; In the same vertical section, the distance between the oblique part and the inner wall of the cone part gradually decreases from top to bottom; In the same vertical cross section, the distance between the arc portion and the inner wall of the cone portion changes from small to large and then changes from large to small from top to bottom.

[0023] By adopting the above technical solution, the arc portion is the main area for water flow, and the arc-shaped design can effectively prevent materials from being stuck in dead corners, and can make the water flow more stable. The inclined portion guides the material into the arc portion, increasing the area for receiving the material, and the material can enter the arc portion more dispersedly along the inclined portion.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. By forming a spiral turbulent flow in the mixing bin through tangentially incident water flow, the retention aid particles are forced to disperse by centrifugal force and roll along the wall surface, fundamentally destroying the formation conditions of the micelles. Compared with the traditional stirring method, this dynamic shear force acts more uniformly and continuously, avoiding the caking problem caused by excessive local concentration. The collaborative design of the conical mixing bin and the spiral guiding vane further optimizes the water flow path, enabling the particles to be fully disturbed in a small space and significantly increasing the dissolution contact area. At the same time, the design of the height difference between the inlet pipe and the outlet pipe conforms to the natural flow law of the fluid. Combining with the negative pressure suction generated by the Bernoulli effect, it not only ensures the continuous renewal of the solvent but also avoids the problem of the dissolution efficiency decreasing with the increase of concentration, realizing a stable continuous dissolution process; 2. The vibration screening mechanism of the sieve plate and the inner bin effectively intercepts large particle agglomerates, and further breaks up the tiny micelles through the mechanical impact of the inclined wall and the inclined plate. The uniform transportation of the screw transportation component ensures that the material enters the mixing bin at a controllable rate. The closed-loop fluid system circulates and processes the incompletely dissolved particles. Combining with the spiral water flow scouring at the bottom of the cone, it completely solves the problem of pipeline blockage caused by particle deposition in traditional equipment. The longitudinal movement of the inner bin driven by the cam not only loosens the piled material but also forms a differential vibration with the sieve plate through the spring linkage, preventing the material from splashing and enhancing the dispersion effect. The mechanical coordination of the whole system significantly improves the operation reliability. Description of the Drawings

[0025] Figure 1 is the overall structural schematic diagram of Embodiment 1 of the present application; Figure 2 is the overall structural sectional view of Embodiment 1 of the present application; Figure 3 is the structural schematic diagram inside the fluid transportation pipeline in Embodiment 1 of the present application; Figure 4 is the structural schematic diagram of the mixing bin in Embodiment 1 of the present application; Figure 5 is the overall structural sectional view of Embodiment 2 of the present application; Figure 6 is the present application Figure 5 local enlarged schematic diagram at position a; Figure 7 is the overall structural schematic diagram of Embodiment 3 of the present application; Figure 8 is the structural schematic diagram of the guiding vane in Embodiment 3 of the present application; Figure 9 is the physical diagram of the present application; Figure 10 is the physical diagram of the present application; Figure 11 is the physical diagram of the present application; Figure 12 is the physical diagram of the present application.

[0026] Description of the reference numerals: 1, frame; 2, mixing component; 21, mixing bin; 211, connecting part; 212, conical part; 213, guiding piece; 2131, arc part; 2132, inclined part; 22, water inlet pipe; 221, first connection point; 23, water outlet pipe; 231, second connection point; 24, fluid transportation pipe; 241, baffle; 242, negative pressure area; 243, high pressure area; 3, feeding bin; 31, outer bin; 32, sieve plate; 321, support column; 322, first spring; 33, stepped part; 331, through hole; 332, baffle; 333, lever; 334, roller; 335, cam; 34, screw transportation component; 341, first power source; 342, connector; 343, screw group; 344, first shaft; 35, discharging area; 36, screening area; 37, inner bin; 371, inclined wall; 372, inclined plate; 373, cross bar; 374, first rod; 375, second rod; 376, second spring. Specific embodiments

[0027] The following will further describe the present application in detail with reference to the attached Figure 1 - attached Figure 12 drawings.

[0028] An online dissolving device for adding retention aids in a medicine is disclosed in an embodiment of the present application.

[0029] Example 1. Refer to Figure 1 and Figure 2 , an online dissolving device for adding retention aids in a medicine, comprising a frame 1, a feeding bin 3, and a mixing component 2. The mixing component 2 is located at the output end of the feeding bin 3. The mixing component 2 receives materials and mixes and dissolves the materials with water.

[0030] Refer to Figure 2 and Figure 3, the mixing component 2 includes a mixing bin 21, a water inlet pipe 22 and a water outlet pipe 23 that are both connected to the mixing bin 21. A fluid transportation pipe 24 is installed on the frame 1. The water inlet pipe 22 and the water outlet pipe 23 are both connected to the fluid transportation pipe 24. In Embodiment 1, the water inlet pipe 22 and the water outlet pipe 23 are both perpendicular to the fluid transportation pipe 24; the water inlet pipe 22 is located at the upstream end of the fluid transportation pipe 24, and the water outlet pipe 23 is located at the downstream end of the fluid transportation pipe 24; the water pressure of the water inlet pipe 22 is greater than that of the water outlet pipe 23; a baffle 241 is provided at the connection between the water outlet pipe 23 and the fluid transportation pipe 24. The baffle 241 divides the fluid channel in the fluid transportation pipe 24 into a high-pressure area 243 and a negative-pressure area 242. The flow area of the fluid channel in the high-pressure area 243 decreases, the flowing water pressure increases, and the flowing water becomes faster. When the water flow passes through the high-pressure area 243, due to the relatively fast flowing water, a negative-pressure area 242 is formed on the other side of the baffle 241, which provides a negative-pressure environment for the water outlet pipe 23 and can effectively prevent the accumulation of materials and water flow at the bottom of the mixing bin 21; Reference Figure 3 , the feeding bin 3 includes an outer bin 31, a sieve plate 32, and a screw transportation component 34. In Embodiment 1, the outer bin 31 is composed of several inwardly converging conical surfaces, such as a cone, a frustum of a cone, etc. The sieve plate 32 is arranged in the outer bin 31 and longitudinally divides the inside of the outer bin 31 into a material discharging area 35 and a screening area 36. The screw transportation component 34 is located at the output end of the screening area 36; the screw transportation component 34 includes a first power source 341 installed on the frame 1, a connector 342 connected to the output end of the first power source 341, and a screw group 343 connected to the output end of the connector 342. The input end of the screw group 343 is connected to the screening area 36, and the output end is connected to the mixing bin 21. In Embodiment 1, the first power source 341 is a motor as an example. The materials are first placed in the material discharging area 35, and the large-particle agglomerates are intercepted in the material discharging area 35 and gradually broken, while the particles meeting the particle size requirements enter the screening area 36, reducing the generation probability of glue clusters from the source; through controllable mechanical transportation, it is ensured that the retention aid enters the mixing component 2 at a constant rate, avoiding both local agglomeration caused by instantaneous excessive feeding and forming a dynamic cooperation with the tangential water flow.

[0031] Reference Figure 4 , the mixing bin 21 is provided with a conical part 212 and a connecting part 211. The connecting part 211 is connected to the output end of the feeding bin 3. The large round end of the conical part 212 is located above, and the small round end is located below. The water inlet channel is close to the large round end, and the water outlet channel is close to the small round end; when the water flow enters the mixing bin 21 through the water outlet pipe 23, the water flow will form a spiral downward water flow along the conical part 212. In Embodiment 1, the output end of the screw group 343 is close to the vertical axis of the mixing bin 21. Under the action of the negative-pressure area 242 and the wall surface of the conical part 212, the spiral downward water flow will gather eddies at the bottom end of the mixing bin 21. At this time, the materials can directly fall into the eddies, and the materials are disturbed through the eddies.

[0032] Example 2, reference Figure 5 , the difference between this embodiment and Embodiment 1 is that: an inner bin 37 is provided in the screening area 36, the shape of the inner bin 37 fits the shape of the outer bin 31, the inner bin 37 can lift the materials in the outer bin 31, the inner bin 37 is located between the sieve plate 32 and the screw conveying assembly 34, the inner bin 37 can longitudinally slide relative to the outer bin 31, the inner bin 37 is provided with an inclined wall 371 and a fixed inclined plate 372, and both the inclined wall 371 and the inclined plate 372 are arranged between the input end and the output end of the inner bin 37; when the materials fall into the screening area 36, the materials will collide with the inclined wall 371 and the inclined plate 372, so that the caked materials are further dispersed; the inclined wall 371 and the inclined plate 372 will make the material distribution more uniform.

[0033] The inner bin 37 can move relative to the outer bin 31. When the materials fall through the sieve plate 32, the movement of the inner bin 37 will drive the inclined plate 372 and the inclined wall 371 to move, which will cause the inclined plate 372 and the inclined wall 371 to collide with the falling materials, so that the falling small lumps will be further dispersed; moreover, the longitudinal movement of the inner bin 37 can loosen the materials accumulated at the bottom of the outer bin 31, preventing the materials from piling up at the bottom of the outer bin 31; the inclined wall 371 and the inclined plate 372 also have the effect of guiding the materials, preventing the material dropping area from being more uniform.

[0034] Reference Figure 6 , the output end of the connector 342 is connected with a first shaft 344, the first shaft 344 penetrates the side wall of the outer bin 31 and extends into the screening area 36, the first shaft 344 is fixedly connected with a cam 335, a stepped portion 33 is provided at the bottom end of the inner bin 37, and a roller 334 is installed on the stepped portion 33. The cam 335 abuts against the roller 334. The longitudinal movement of the inner bin 37 is realized by adopting the cam 335 mechanism. The roller 334 can reduce the friction between the cams 335. When the inner bin 37 vibrates, it can effectively loosen the materials in the bin and prevent piling up; a through groove is provided at the bottom end of the inner bin 37, the first shaft 344 penetrates the through groove, the first shaft 344 is fixedly connected with a baffle 332, the baffle 332 abuts against one side of the through groove, and a dial rod 333 is installed on the baffle 332. The baffle 332 can block the through groove to prevent the materials from entering through the through groove. The first shaft 344 drives the dial rod 333 to rotate through the baffle 332. Through the rotation of the dial rod 333, the materials at the output port of the inner bin 37 can be loosened to prevent the materials from piling up.

[0035] Reference Figure 5, the outer bin 31 is fixedly connected with a plurality of pillars 321, the sieve plate 32 is mounted on the pillars 321, and a first spring 322 is mounted on the pillars 321, the first spring 322 forces the sieve plate 32 to move downward, the inner bin 37 is fixedly connected with a cross bar 373, the cross bar 373 is fixedly connected with a first rod 374, the sieve plate 32 is fixedly connected with a second rod 375 nested with the first rod 374, and a second spring 376 is provided between the first rod 374 and the second rod 375; the first rod 374 and the second rod 375 are used as force transmission components, which can transmit the directional movement of the inner bin 37 to the sieve plate 32, so that the sieve plate 32 can screen the material; the first spring 322 and the second spring 376 can shorten the amplitude of vibration on the one hand, and prevent the sieve plate 32 from vibrating out the material due to excessive vibration amplitude, and on the other hand, change the vibration efficiency of the sieve plate 32, resulting in a vibration time difference between the sieve plate 32 and the inner bin 37, which can better make the material collide with the inclined plate 372 and the inclined wall 371, thereby dispersing it.

[0036] Example 3, reference Figure 7 The difference between this embodiment and the first embodiment is that the cone 212 is fixedly connected with a guide piece 213, and the guide piece 213 spirals downward along the inner wall of the cone. In the third embodiment, the guide piece 213 is a slender iron sheet, and the guide piece 213 is fixed to the cone 212 by welding. The guide piece 213 allows the water flow to form a spiral downward water flow better, and on the other hand, it receives the material and mixes it with the water flow better; the material and the water flow can be better fully contacted in a small space, so that the dissolution effect is better, and the material flow in a small space has a more obvious disturbance effect, and the material dissolution effect is better.

[0037] refer to Figure 7 and Figure 8 The guide piece 213 includes an arc portion 2131 and an inclined portion 2132. The arc portion 2131 is close to the inner wall of the cone portion 212. The inclined portion 2132 is located higher than the arc portion 2131. The arc portion 2131 and the inclined portion 2132 are connected. In the same vertical section, the distance between the inclined portion 2132 and the inner wall of the cone portion 212 gradually decreases from top to bottom; in the same vertical section, the distance between the arc portion 2131 and the inner wall of the cone portion 212 changes from small to large, and then from large to small. The arc portion 2131 is the main area for water flow. The arc-shaped design can effectively prevent materials from being stuck in dead corners and can make the water flow more stable. The inclined portion 2132 guides the materials into the arc portion 2131, increases the area for receiving materials, and the materials can enter the arc portion 2131 more dispersedly along the inclined portion 2132.

[0038] The output end of the screw group 343 is close to the inner wall of the mixing bin 21, and the water inlet pipe 22 is close to the inner wall of the mixing bin 21. When water flows into the mixing bin 21, the backflow will flow along the inner wall and the arc of the guiding piece 213. The material is output from the output end of the screw group 343 and will touch the inclined part 2132 during the falling process, causing dispersion and making the material dissolve more evenly.

[0039] Embodiment 4. Referring to FIG. 7, the difference between this embodiment and Embodiment 1 is that the angles formed by the water inlet pipe 22, the water outlet pipe 23 and the fluid transportation pipe 24 are all less than 90°. In Embodiment 4, the angles formed by the water inlet pipe 22, the water outlet pipe 23 and the fluid transportation pipe 24 are all 45°. The included angle opening at the connection between the water inlet pipe 22 and the fluid transportation pipe 24 faces the downstream end of the fluid transportation pipe 24, and the included angle opening at the connection between the water outlet pipe 23 and the fluid transportation pipe 24 faces the upstream end of the fluid transportation pipe 24. The upstream end refers to the direction where the water flow comes in the pipe, and the downstream end refers to the direction where the water flow goes away in the pipe.

[0040] When the water flow in the fluid transportation pipe 24 flows through the water inlet pipe 22, due to the inclination of the water inlet pipe 22, the water flow can more easily enter the water inlet pipe 22. When the water flow in the fluid transportation pipe flows through the water outlet pipe 23, due to the inclination of the water outlet pipe 23, the difficulty for the water flow to enter the water outlet pipe 23 increases. In this way, the water flow in the fluid transportation pipe 24 will only enter the water inlet pipe 22, and a negative pressure area 242 is formed in the water outlet pipe 23.

[0041] The above are all the preferred embodiments of this application. The protection scope of this application is not limited hereby. Therefore, all equivalent changes made according to the structure, shape and principle of this application shall be covered within the protection scope of this application.

Claims

1. An online dissolution device for adding a retention aid, characterized in that: including a frame (1) equipped with a fluid delivery pipeline for an external water source; a feeding bin (3) installed on the frame (1); a mixing component (2) including a mixing bin (21) installed on the frame (1), a water inlet pipeline (22) and a water outlet pipeline (23) both communicating with the mixing bin (21), the water inlet pipeline (22) and the water outlet pipeline (23) both communicating with the fluid delivery pipeline, the mixing bin (21) communicating with the output end of the feeding bin (3), and the incident water flow in the water inlet pipeline (22) being substantially tangent to the inner wall of the mixing bin (21); wherein, when the retention aid in the feeding bin (3) is added to the mixing component (2), the incident water flow will convey the retention aid spirally along the inner wall of the mixing bin (21).

2. The retention aid dosing and on-line dissolution equipment according to claim 1, characterized in that: The feeding bin (3) includes an outer bin (31), a sieve plate (32) and a screw conveying component (34). The sieve plate (32) is arranged in the outer bin (31) and longitudinally divides the inside of the outer bin (31) into a feeding area (35) and a screening area (36). The screw conveying component (34) is located at the output end of the screening area (36).

3. The retention aid dosing and on-line dissolving equipment according to claim 2, characterized in that: The screw conveying component (34) includes a first power source (341) installed on the frame (1), a connector (342) connected to the output end of the first power source (341), a screw group (343) and a first shaft (344) respectively connected to the output end of the connector (342). The input end of the screw group (343) communicates with the screening area (36), and the output end communicates with the mixing bin (21). The first shaft (344) penetrates the side wall of the outer bin (31) and extends into the screening area (36).

4. The retention aid dosing and on-line dissolving equipment according to claim 3, characterized in that: An inner bin (37) is arranged in the screening area (36). The inner bin (37) is located between the sieve plate (32) and the screw conveying component (34). The inner bin (37) can slide longitudinally relative to the outer bin (31). The inner bin (37) is provided with an inclined wall (371) and an inclined plate (372) fixedly connected thereto. Both the inclined wall (371) and the inclined plate (372) are arranged between the input end and the output end of the inner bin (37).

5. The retention aid dosing online dissolution device according to claim 4, wherein: A stepped portion (33) is provided at the bottom end of the inner bin (37). A roller (334) is installed on the stepped portion (33). A cam (335) is fixedly connected to the first shaft (344). The cam (335) abuts against the roller (334). A through groove is provided at the bottom end of the inner bin (37). The first shaft (344) penetrates the through groove. A baffle (332) is fixedly connected to the first shaft (344). The baffle (332) abuts against one side of the through groove. A lever (333) is installed on the baffle (332).

6. The retention aid dosing and online dissolution device according to claim 5, wherein: A number of support columns (321) are fixedly connected to the outer bin (31). The sieve plate (32) is installed on the support columns (321). A first spring (322) is installed on the support columns (321). The first spring (322) forces the sieve plate (32) to move downward. A cross bar (373) is fixedly connected to the inner bin (37). A first rod (374) is fixedly connected to the cross bar (373). A second rod (375) nested with the first rod (374) is fixedly connected to the sieve plate (32). A second spring (376) is provided between the first rod (374) and the second rod (375).

7. The retention aid dosing and on-line dissolving equipment according to claim 1, wherein: The fluid conveying pipeline is respectively provided with a first connection part (221) and a second connection part (231) connected to the water inlet pipeline (22) and the water outlet pipeline (23). The angles formed by the axis of the first connection part (221), the axis of the second connection part (231) and the axis of the fluid conveying pipeline are less than or equal to 90°.

8. The retention aid dosing online dissolution device according to claim 7, characterized in that: The mixing bin (21) is provided with a conical part (212) and a connecting part (211). The connecting part (211) is communicated with the output end of the feeding bin (3). The large circular end of the conical part (212) is located above, and the small circular end is located below. The water inlet channel is close to the large circular end, and the water outlet channel is close to the small circular end.

9. The retention aid dosing online dissolution device according to claim 8, characterized in that: A guiding piece (213) is fixedly connected to the conical part (212), and the guiding piece (213) spirals downward along the inner wall of the conical part (212).

10. The retention aid dosing and on-line dissolving equipment according to claim 9, characterized in that: The guiding piece (213) includes an arc part (2131) and an inclined part (2132). The arc part (2131) is close to the inner wall of the conical part (212), and the position of the inclined part (2132) is higher than that of the arc part (2131); In the same vertical section, the distance between the inclined part (2132) and the inner wall of the conical part (212) gradually decreases from top to bottom; In the same vertical section, the distance between the arc part (2131) and the inner wall of the conical part (212) first decreases from top to bottom, then increases, and then decreases again.

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