An on-line dosing and dissolving device for retention aid

Abstract

The application discloses an on-line dissolving device for adding retention aid, which comprises a rack, a fluid conveying pipeline connected with an external water source, a feeding bin mounted on the rack, a mixing assembly comprising a mixing bin mounted on the rack, a water inlet pipeline and a water outlet pipeline both communicating with the mixing bin, the water inlet pipeline and the water outlet pipeline both communicating with the fluid conveying pipeline, the mixing bin communicating with an output end of the feeding bin, and an incident water flow of the water inlet pipeline being substantially tangent to an inner wall of the mixing bin. The application forms spiral turbulent flow in the mixing bin through the tangent incident water flow, forcibly disperses retention aid particles by centrifugal force and makes the particles roll along the wall, and fundamentally destroys the formation condition of colloidal particles. Compared with a traditional stirring mode, the dynamic shear force is more uniform and continuous, and the caking problem caused by excessively high local concentration is avoided. The synergistic design of the conical mixing bin and the spiral guide piece further optimizes the water flow path, fully disturbs the particles in a small space, and significantly increases the dissolving contact area.

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 dosing 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 the paper. Commonly used retention aids include polyacrylamide and cationic starch.

[0003] Traditional retention aid dissolution usually adopts manual addition or simple stirring equipment, which has the following technical defects:

[0004] 1. The retention aid is prone to form "fish-eye" micelles due to excessive addition or insufficient stirring. After the outer layer dissolves, the inner part remains a hard lump, resulting in incomplete dissolution and reduced utilization of the effective ingredients.

[0005] 2. Insufficiently dissolved retention aid particles tend to settle in the dosing pipe or pump, causing blockage and requiring frequent shutdowns for cleaning, affecting production continuity.

[0006] 3. Insufficient adaptability to the high viscosity and easy agglomeration characteristics of retention aids;

[0007] 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

[0008] 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.

[0009] The present application provides an online dissolution device for dosing a retention aid, which adopts the following technical solution: it includes a frame equipped with a fluid conveying pipe connected to an external water source; 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 pipe, 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.

[0010] By adopting the technical scheme, the tangential water flow forms spiral turbulent flow in the mixing bin, and the retention aid particles are forced to disperse and roll along the wall surface by centrifugal force, effectively destroying the formation conditions of the micelle, and improving the dissolution uniformity compared with the traditional stirring method; secondly, the design of the continuous flushing of the dynamic water flow avoids the deposition of the particles, and the direct connection of the inlet pipe and the outlet pipe with the main conveying pipe forms a closed loop system, so that the undissolved particles can be recycled, and the pipe blockage rate is reduced; thirdly, the collaborative work of the mixing bin and the feeding bin realizes the online continuous operation of feeding, dispersion and dissolution, the water flow rate is controlled to ensure that the shear force is sufficient and to prevent viscosity loss, so that the effective utilization rate of the cationic starch and other retention aids is improved.

[0011] Preferably, the feeding bin comprises an outer bin, a sieve plate and a screw conveying assembly, the sieve plate is arranged in the outer bin and longitudinally divides the inner part of the outer bin into a feeding area and a screening area, and the screw conveying assembly is located at the output end of the screening area.

[0012] By adopting the technical scheme, the longitudinal partition design of the outer bin and the sieve plate realizes the pre-screening function of the raw materials, the large particle agglomerates are intercepted in the feeding area and gradually broken, and the particles meeting the particle size requirements enter the screening area, thereby reducing the probability of micelle generation from the source; the retention aid enters the mixing assembly at a constant rate through controllable mechanical conveying, which avoids local agglomeration caused by instantaneous overfeeding and can form dynamic cooperation with the tangential water flow.

[0013] Preferably, the screw conveying assembly comprises a first power source mounted on a rack, a connector connected to the output end of the first power source, a screw group and a first shaft connected to the output end of the connector respectively, the input end of the screw group is communicated with the screening area, and the output end is communicated with the mixing bin, and the first shaft penetrates through the side wall of the outer bin and extends into the screening area.

[0014] By adopting the technical scheme, the first power source synchronously drives the screw group and the first shaft to rotate through the connector, forming a mechanical linkage system, which ensures the continuous and stable conveying process of the retention aid from the screening area to the mixing bin. The screw propulsion structure of the screw group can generate uniform shear force on the retention aid, further breaking the micelles in the conveying process and preventing the particles from re-aggregating.

[0015] Preferably, the screening area is provided with an inner bin located between the sieve plate and the screw conveying assembly, the inner bin can longitudinally slide relative to the outer bin, the inner bin is provided with an inclined wall and a fixedly connected inclined plate, and the inclined wall and the inclined plate are arranged between the input end and the output end of the inner bin.

[0016] By adopting the above technical scheme, 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, which will cause the inclined plate and the inclined wall to impact the falling material, so that the small clumps falling will be further dispersed; moreover, the longitudinal movement of the inner bin can loosen the material accumulated at the bottom of the outer bin, preventing the material from being accumulated at the bottom of the outer bin; the inclined wall and the inclined plate also have a guiding effect on the material, preventing the material falling area from being more uniform.

[0017] Preferably, the bottom end of the inner bin is provided with a stepped portion, the stepped portion is provided with a roller, the first shaft is fixedly connected with a cam, the cam abuts against the roller, the bottom end of the inner bin is provided with a through groove, the first shaft penetrates through the through groove, the first shaft is fixedly connected with a baffle, the baffle abuts against one side of the through groove, and a lever is installed on the baffle.

[0018] By adopting the above technical scheme, the longitudinal movement of the inner bin is realized by using a cam mechanism, the roller can reduce the friction between the cams, and the baffle can block the through groove to prevent the material from entering from the through groove.

[0019] Preferably, the outer bin is fixedly connected with a plurality of support columns, the sieve plate is installed on the support columns, a first spring is installed on the support column, 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 is fixedly connected with the sieve plate and is nested with the first rod, and a second spring is arranged between the first rod and the second rod.

[0020] By adopting the above technical scheme, the first rod and the second rod serve as force transmission components, which can transmit the directional movement of the inner bin to the sieve plate, so that the sieve plate can screen the material; the first spring and the second spring can shorten the amplitude of vibration on one hand, preventing the sieve plate from vibrating the material out due to too large vibration amplitude, and on the other hand, changing the vibration efficiency of the sieve plate, causing the sieve plate to vibrate differently from the inner bin, which can better make the material collide with the inclined plate and the inclined wall, thereby being dispersed.

[0021] Preferably, the fluid conveying pipeline is respectively provided with a first connection and a second connection connected with the water inlet pipeline and the water outlet pipeline, the angle formed by the axis of the first connection, the axis of the second connection and the axis of the fluid conveying pipeline is less than or equal to 90°.

[0022] By adopting the technical scheme, part of the water flow in the fluid conveying pipeline enters the mixing bin through the water inlet pipeline, and a spiral downward water column is formed along the inner wall of the mixing bin, the spiral water column carries the material to move, and the material is fully dissolved; secondly, the flow rate of the fluid conveying pipeline is greater than that of the water outlet pipeline, according to Bernoulli's principle, the water outlet pipeline generates negative pressure, which is convenient for the water flow after dissolution to be discharged; compared with the traditional method of directly stirring and dissolving in the tank, the dissolution effect of the application is better, and the solvent of the traditional dissolution method remains unchanged, and the overall dissolution effect will decrease with the dissolution of the material. The solvent of the application is continuously provided, which is continuous small-batch dissolution, and the overall dissolution effect remains unchanged.

[0023] Preferably, the mixing bin is provided with a tapered portion and a connecting portion, the connecting portion is in communication with the output end of the feeding bin, the large end of the tapered portion is located at the upper side, and the small end is located at the lower side. The water inlet channel is close to the large end, and the water outlet channel is close to the small end.

[0024] By adopting the technical scheme, the height of the water inlet channel is higher than that of the water outlet channel, which not only conforms to the natural law of water flowing from top to bottom, but also makes the water flow more easily form a spiral downward water flow in the inner wall of the mixing bin.

[0025] Preferably, the tapered portion is fixedly connected with a guide piece, and the guide piece spirally downward along the inner wall of the tapered portion.

[0026] By adopting the technical scheme, the guide piece not only makes the water flow better form a spiral downward water flow, but also receives the material and mixes with the water flow better; in a small space, the material and the water flow can better fully contact, so that the dissolution effect is better, and the material disturbance effect is more obvious in the small space, so that the material dissolution effect is better.

[0027] Preferably, the guide piece comprises an arc portion and an inclined portion, the arc portion is close to the inner wall of the tapered portion, and the position of the inclined portion is higher than that of the arc portion.

[0028] In the same vertical section, the distance between the inclined portion and the inner wall of the tapered portion gradually decreases from top to bottom.

[0029] In the same vertical section, the distance between the arc portion and the inner wall of the tapered portion gradually increases from small to large, and then decreases from large to small.

[0030] By adopting the technical scheme, the arc portion is the main area of water flow, the arc-shaped design can effectively prevent the material from being stuck in the dead angle position, and the water flow can flow more smoothly. The inclined portion guides the material into the arc portion, increases the area of receiving the material, and the material can be more dispersedly entered into the arc portion along the inclined portion.

[0031] In summary, the application has at least one of the following beneficial technical effects:

[0032] 1. By tangential water flow, a spiral turbulent flow is formed in the mixing bin, and the particles of the retention aid are forced to disperse and roll along the wall by centrifugal force, which fundamentally destroys the formation conditions of the micelles. Compared with the traditional stirring method, the dynamic shear force is more uniform and continuous, which avoids the problem of caking caused by local high concentration. The synergistic design of the conical mixing bin and the spiral guide piece further optimizes the water flow path, so that the particles are fully disturbed in a small space, and the dissolution contact area is significantly increased. At the same time, the high-low difference design of the water inlet pipe and the water outlet pipe conforms to the natural flow law of the fluid, combined with the negative pressure suction generated by Bernoulli effect, which not only ensures the continuous updating of the solvent, but also avoids the problem that the dissolution efficiency decreases with the increase of concentration, and realizes the stable continuous dissolution process.

[0033] 2. The vibration screening mechanism of the sieve plate and the inner bin effectively intercepts large particle agglomerates, and further breaks the small micelles through mechanical impact of the inclined wall and inclined plate, while the uniform speed conveying of the screw conveying assembly ensures that the material enters the mixing bin at a controllable rate. The closed-loop fluid system circulates the particles that are not completely dissolved, combined with the spiral water flow scouring at the bottom of the cone, which completely solves the problem of pipe blockage caused by particle deposition in traditional equipment. The longitudinal movement of the inner bin driven by the cam not only loosens the accumulated material, but also forms differential vibration through the spring linkage sieve plate, which not only prevents material splashing but also enhances the dispersion effect, and the mechanical synergy of the whole system significantly improves the operation reliability. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 is the overall structure schematic diagram of embodiment 1 of the present application;

[0035] Figure 2 is the overall structure cross-sectional view of embodiment 1 of the present application;

[0036] Figure 3 is the structure schematic diagram in the fluid transportation pipeline in embodiment 1 of the present application;

[0037] Figure 4 is the structure schematic diagram of the mixing bin in embodiment 1 of the present application;

[0038] Figure 5 is the overall structure cross-sectional view of embodiment 2 of the present application;

[0039] Figure 6 is the local enlarged schematic diagram of a in the present application; Figure 5

[0040] Figure 7 is the overall structure schematic diagram of embodiment 3 of the present application;

[0041] Figure 8 is the structure schematic diagram of the guide piece in embodiment 3 of the present application;

[0042] Figure 9 ​is a physical diagram of the present application;

[0043] Figure 10 is a physical diagram of the present application;

[0044] Figure 11 is a physical diagram of the present application;

[0045] Figure 12 is a physical diagram of the present application.

[0046] Explanation of reference signs: 1, rack; 2, mixing assembly; 21, mixing bin; 211, connecting part; 212, taper part; 213, guide piece; 2131, arc part; 2132, inclined part; 22, water inlet pipeline; 221, first connecting part; 23, water outlet pipeline; 231, second connecting part; 24, fluid transportation pipeline; 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 plate; 333, lever; 334, roller; 335, cam; 34, screw transportation assembly; 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 rod; 374, first rod; 375, second rod; 376, second spring. DETAILED DESCRIPTION

[0047] The following will be described in detail below with reference to the accompanying drawings. Figure 1 - the accompanying drawings Figure 12 The present application will be further described in detail.

[0048] The embodiment of the present application discloses an on-line dissolving device for adding retention aid.

[0049] Embodiment 1, refer to Figure 1 and Figure 2 An on-line dissolving device for adding retention aid, comprising a rack 1, a feeding bin 3, and a mixing assembly 2, the mixing assembly 2 is located at the output end of the feeding bin 3, the mixing assembly 2 receives materials and mixes and dissolves the materials with water.

[0050] Reference Figure 2 and Figure 3The mixing assembly 2 comprises a mixing bin 21, a water inlet pipeline 22 and a water outlet pipeline 23 which are in communication with the mixing bin 21, and a fluid conveying pipeline 24 is installed on the rack 1, the water inlet pipeline 22 and the water outlet pipeline 23 are in communication with the fluid conveying pipeline 24, and in the embodiment 1, the water inlet pipeline 22 and the water outlet pipeline 23 are perpendicular to the fluid conveying pipeline 24; the water inlet pipeline 22 is located at the upstream end of the fluid conveying pipeline 24, and the water outlet pipeline 23 is located at the downstream end of the fluid conveying pipeline 24; the water pressure of the water inlet pipeline 22 is greater than that of the water outlet pipeline 23; a baffle 241 is arranged at the connection between the water outlet pipeline 23 and the fluid conveying pipeline 24, the baffle 241 divides the fluid passage in the fluid conveying pipeline 24 into a high-pressure area 243 and a negative pressure area 242, the fluid passage flow area in the high-pressure area 243 is reduced, the water flow pressure is increased, and the water flow is fast, when the water flow passes through the high-pressure area 243, the negative pressure area 242 is formed on the other side of the baffle 241 due to the relatively large water flow, which provides a negative pressure environment for the water outlet pipeline 23, and can effectively prevent the material and water flow from accumulating at the bottom of the mixing bin 21.

[0051] With reference to Figure 3 The feeding bin 3 comprises an outer bin 31, a sieve plate 32 and a screw conveying assembly 34, in the embodiment 1, the outer bin 31 is composed of a plurality of inwardly tapered surfaces, such as a circular cone, a truncated cone and the like, the sieve plate 32 is arranged in the outer bin 31 and longitudinally divides the inner part of the outer bin 31 into a feeding area 35 and a screening area 36, and the screw conveying assembly 34 is located at the output end of the screening area 36; the screw conveying assembly 34 comprises a first power source 341 installed on the rack 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 in communication with the screening area 36, and the output end is in communication with the mixing bin 21; in the embodiment 1, the first power source 341 is taken as an example of a motor, the material is first placed in the feeding area 35, the large particle agglomerates are intercepted in the feeding area 35 and gradually broken, and the particles meeting the particle size requirements enter the screening area 36, thereby reducing the probability of generating agglomerates from the source; the retention aid is ensured to enter the mixing assembly 2 at a constant rate through controllable mechanical conveying, which not only avoids local agglomeration caused by instantaneous overfeeding, but also forms dynamic cooperation with the tangential water flow.

[0052] With reference to Figure 4The mixing bin 21 is provided with a taper portion 212 and a connecting portion 211, the connecting portion 211 is communicated with the output end of the feeding bin 3, the large circle end of the taper portion 212 is located at the upper side, and the small circle end is located at the lower side, the water inlet channel is close to the large circle end, and the water outlet channel is close to the small circle end; when the water flow enters the mixing bin 21 through the water outlet pipeline 23, the water flow will form a spiral downward water flow along the taper portion 212, the output end of the screw rod group 343 in the embodiment 1 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 taper portion 212, the spiral downward water flow will gather vortex at the bottom end of the mixing bin 21, at this time, the material can directly fall into the vortex, and the disturbance of the material is realized through the vortex.

[0053] Embodiment 2, referring to Figure 5 The difference between the embodiment and the embodiment 1 is that the inner bin 37 is arranged in the screening area 36, the shape of the inner bin 37 is matched with the shape of the outer bin 31, the inner bin 37 can lift the material in the outer bin 31, the inner bin 37 is located between the sieve plate 32 and the screw rod 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 inclined wall 371 and a fixedly connected inclined plate 372, 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 material falls into the screening area 36, the material will collide with the inclined wall 371 and the inclined plate 372, so that the caked material is further dispersed; the inclined wall 371 and the inclined plate 372 can make the material more uniformly distributed.

[0054] The inner bin 37 can move relative to the outer bin 31, when the material falls 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, so that the inclined plate 372 and the inclined wall 371 collide with the falling material, so that the small caked material is further dispersed; in addition, the longitudinal movement of the inner bin 37 can loosen the material gathered at the bottom of the outer bin 31, so as to prevent the material from being accumulated at the bottom of the outer bin 31; the inclined wall 371 and the inclined plate 372 also have a guiding effect on the material, so as to prevent the material from falling more uniformly.

[0055] Referring to Figure 6The 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 the cam 335, the bottom end of the inner bin 37 is provided with a stepped portion 33, the stepped portion 33 is provided with a roller 334, the cam 335 abuts against the roller 334, the longitudinal movement of the inner bin 37 is realized by using the cam 335 mechanism, the roller 334 can reduce the friction between the cams 335, when the inner bin 37 vibrates, the material in the bin can be effectively loosened, and the material is prevented from being piled up; the bottom end of the inner bin 37 is provided with a through slot, the first shaft 344 penetrates the through slot, the first shaft 344 is fixedly connected with a baffle 332, the baffle 332 abuts against one side of the through slot, the baffle 332 is provided with a push rod 333, the baffle 332 can block the through slot to prevent the material from entering the through slot. The first shaft 344 drives the push rod 333 to rotate through the baffle 332, the material at the output port of the inner bin 37 can be loosened through the rotation of the push rod 333, and the material is prevented from being piled up.

[0056] Reference Figure 5 The outer bin 31 is fixedly connected with a plurality of support columns 321, the sieve plate 32 is installed on the support columns 321, the support columns 321 are provided with first springs 322, the first springs 322 force the sieve plate 32 to move downward, the inner bin 37 is fixedly connected with a cross rod 373, the cross rod 373 is fixedly connected with a first rod 374, the sieve plate 32 is fixedly connected with a second rod 375 which is nested with the first rod 374, and a second spring 376 is arranged between the first rod 374 and the second rod 375; the first rod 374 and the second rod 375 serve as force transmission components, 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 vibration amplitude on the one hand, prevent the sieve plate 32 from vibrating the material out due to the too large vibration amplitude, and change the vibration efficiency of the sieve plate 32 on the other hand, cause the sieve plate 32 to vibrate differently from the inner bin 37, and better enable the material to collide with the inclined plate 372 and the inclined wall 371, thereby being dispersed.

[0057] Embodiment 3, reference Figure 7 The difference between the present embodiment and embodiment 1 is that the tapered portion 212 is fixedly connected with a guide piece 213, the guide piece 213 spirally downward along the inner wall of the tapered portion, the guide piece 213 in embodiment 3 is an elongated iron piece, and the guide piece 213 is fixed on the tapered portion 212 by welding. The guide piece 213 can make the water flow better form a spiral downward water flow on the one hand, and receive the material and better mix with the water flow on the other hand; the material and the water flow can better fully contact in a small space, the dissolution effect is better, the material flows in a small space, the material disturbance effect is more obvious, and the material dissolution effect is better.

[0058] Reference Figure 7 And Figure 8The guiding piece 213 includes an arc part 2131 close to the inner wall of the taper part 212 and an inclined part 2132 located higher than the arc part 2131. The arc part 2131 and the inclined part 2132 are connected, and in the same vertical section, the distance between the inclined part 2132 and the inner wall of the taper 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 taper part 212 gradually increases from small to large and then decreases from large to small. The arc part 2131 is the main area for water flow, and the arc design can effectively prevent material from being stuck in the dead angle position and make the water flow more stable. The inclined part 2132 guides the material into the arc part 2131, increases the area for receiving the material, and enables the material to enter the arc part 2131 more dispersedly along the inclined part 2132.

[0059] The output end of the screw rod 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 the water flow enters the mixing bin 21, the backflow will flow along the inner wall and the arc between the guiding piece 213. The material is output from the output end of the screw rod group 343 and will touch the inclined part 2132 during the falling process, causing dispersion, so that the material is more uniformly dissolved.

[0060] In the embodiment 4, the angles formed by the water inlet pipe 22, the water outlet pipe 23 and the fluid conveying pipe 24 are all 45°. The included angle opening at the connection between the water inlet pipe 22 and the fluid conveying pipe 24 is directed to the downstream end of the fluid conveying pipe 24, and the included angle opening at the connection between the water outlet pipe 23 and the fluid conveying pipe 24 is directed to the upstream end of the fluid conveying pipe 24. The upstream end refers to the direction of the water flow in the pipe, and the downstream end refers to the direction of the water flow away from the pipe.

[0061] When the water flow in the fluid conveying pipe 24 flows through the water inlet pipe 22, the water flow can more easily enter the water inlet pipe 22 due to the inclination of the water inlet pipe 22. When the water flow in the fluid conveying pipe 24 flows through the water outlet pipe 23, the water flow is more difficult to enter the water outlet pipe 23 due to the inclination of the water outlet pipe 23. In this way, the water flow in the fluid conveying pipe 24 will only enter the water inlet pipe 22, and a negative pressure area 242 is formed in the water outlet pipe 23.

[0062] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application. Therefore, any equivalent changes made on the basis of the structure, shape and principle of the present application should be covered by the protection scope of the present application.

Claims

1. A retention aid dosing and online dissolution device, characterized by: include A frame (1) is provided with a fluid delivery pipeline connected to an external water source; A feeding bin (3) is mounted on the frame (1); A mixing assembly (2) comprising a mixing bin (21) mounted on the frame (1), an inlet pipe (22) and an outlet pipe (23) both connected to the mixing bin (21), the inlet pipe (22) and the outlet pipe (23) both connected to a fluid delivery pipe, the mixing bin (21) being connected to an output end of the feeding bin (3), and an incident water flow of the inlet pipe (22) being substantially tangent to an inner wall of the mixing bin (21); The feeding bin (3) comprises an outer bin (31), a sieve plate (32) and a screw transport assembly (34); the sieve plate (32) is arranged in the outer bin (31) and longitudinally divides the inner portion of the outer bin (31) into a discharge area (35) and a screening area (36); the screw transport assembly (34) is located at the output end of the screening area (36); An inner bin (37) is provided in the screening area (36), and the inner bin (37) is located between the screen plate (32) and the screw conveying assembly (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 a fixedly connected inclined plate (372). The inclined wall (371) and the inclined plate (372) are both provided between the input end and the output end of the inner bin (37); The outer bin (31) is fixedly connected to a plurality of pillars (321), the sieve plate (32) is mounted on the pillars (321), 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 to a crossbar (373), the crossbar (373) is fixedly connected to a first rod (374), the sieve plate (32) is fixedly connected to 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); When the retention aid in the feeding bin (3) is added to the mixing component (2), the incident water flow will spirally transport the retention aid along the inner wall of the mixing bin (21).

2. The retention aid dosing online dissolution equipment according to claim 1, characterized in that: The screw transport assembly (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) is connected to the screening area (36), and the output end is connected to the mixing bin (21), and the first shaft (344) passes through the side wall of the outer bin (31) and extends into the screening area (36).

3. The retention aid dosing online dissolution equipment according to claim 2, characterized in that: The bottom end of the inner bin (37) is provided with a stepped portion (33), the stepped portion (33) is installed with a roller (334), the first shaft (344) is fixedly connected to the cam (335), the cam (335) abuts against the roller (334), the bottom end of the inner bin (37) is provided with a through slot, the first shaft (344) passes through the through slot, the first shaft (344) is fixedly connected with a baffle (332), the baffle (332) abuts against one side of the through slot, and a shift lever (333) is installed on the baffle (332).

4. The retention aid dosing and online dissolution equipment according to claim 1, characterized in that: The fluid delivery pipeline is provided with a first connection point (221) and a second connection point (231) connected to the water inlet pipeline (22) and the water outlet pipeline (23), respectively. The angle formed by the axis of the first connection point (221), the axis of the second connection point (231) and the axis of the fluid delivery pipeline is less than or equal to 90°.

5. The retention aid dosing and online dissolution equipment according to claim 4, characterized in that: The mixing bin (21) is provided with a cone (212) and a connecting portion (211), the connecting portion (211) being connected to the output end of the feeding bin (3), the large circular end of the cone (212) being located at the top, the small circular end being located at the bottom, the water inlet channel being close to the large circular end, and the water outlet channel being close to the small circular end.

6. The retention aid dosing and online dissolution equipment according to claim 5, characterized in that: The cone portion (212) is fixedly connected to a guide piece (213), and the guide piece (213) spirals downward along the inner wall of the cone portion (212).

7. The retention aid dosing and online dissolution equipment according to claim 6, characterized in that: The guide piece (213) comprises an arc portion (2131) and an inclined portion (2132), wherein the arc portion (2131) is close to the inner wall of the cone portion (212), and the inclined portion (2132) is located higher than the arc portion (2131); In the same vertical cross section, the distance between the inclined portion (2132) and the inner wall of the conical portion (212) gradually decreases from top to bottom; In the same vertical cross 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 from top to bottom.

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