Distributing device for AKD (Alkyl Ketene Dimer) steel belt granulation

Abstract

The utility model relates to a distributing device for AKD (Alkyl Ketene Dimer) steel belt granulation, which comprises a distributing roller, a pair of overflow material blocking mechanisms is arranged on the peripheral surfaces of two ends of the distributing roller, and each overflow material blocking mechanism comprises a plurality of overflow material blocking mechanisms, the baffle turnup is arranged on the peripheral face of the cloth roller in a sleeving mode, the end face, with the larger outer diameter, of the variable-diameter check block is fixed to the end face of the baffle turnup, and the other end face of the variable-diameter check block right faces the middle of the cloth roller; the axis of the baffle turnup and the axis of the variable-diameter check block are collinear with the axis of the material distributing roller, so that excess materials overflowing from the two end edges of the material distributing roller are guided to the baffle turnup, and the excess materials drop onto a steel belt of a material distributor due to the dead weight; the overflow material blocking mechanisms are additionally arranged at the two ends of the material distribution roller, so that the problem that AKD materials overflow from the two ends in the material distribution process is effectively solved, formation of long-strip-shaped defective materials is avoided, the risks of manual intervention and black impurity introduction are reduced, and the product quality is remarkably improved.

Description

Technical Field

[0001] This utility model relates to the technical field of sizing agent production equipment, specifically a feeder for AKD steel strip granulation. Background Technology

[0002] Alkyl ketone dimer (AKD) is an unsaturated lactone that can be used as an alkaline sizing agent in papermaking. It is mainly used as an internal sizing agent for coated paper, copy paper, archival paper, dictionary paper, and high-quality writing paper, achieving a sizing pH of around 8.0. It is widely used both domestically and internationally. There are two main processes for AKD synthesis:

[0003] One method is a solvent-based process, with the main raw materials being triethylamine, fatty acid acyl chloride, and toluene, where toluene is the solvent. In the synthesis reaction, due to the presence of the solvent toluene, the material has good flowability and low viscosity, and a stirring reaction mode is generally adopted in a kettle.

[0004] Another method is the solvent-free process, with triethylamine and fatty acid acyl chloride as the main raw materials. In the solvent-free synthesis of papermaking additive AKD, the material viscosity is high in the later stage of the reaction, and the material contains fine triethylamine hydrochloride solid particles. At a temperature of T=65℃, the material viscosity can reach 130,000 mPa·s. After the reaction is completed, the triethylamine hydrochloride solid particles in the AKD product need to be dissolved in the solution to achieve the stratification of AKD in the triethylamine hydrochloride aqueous solution, thereby obtaining a high-purity AKD product. Finally, AKD is dehydrated under vacuum to remove volatile impurities.

[0005] However, after dehydration, AKD needs to be evenly distributed onto the steel belt by the feeder of the steel belt pellet mill to produce granules for packaging, transportation, and storage. However, because AKD has good flowability when it enters the feeder, some AKD material will overflow along both ends of the feeder roller to the outside of the feeder, forming long strips of defective material outside the feeder holes. This excess material needs to be manually removed, which affects continuous production. Moreover, during the removal process, black impurities are easily introduced due to the poor working environment, thus affecting product quality. Utility Model Content

[0006] The technical problem to be solved by this utility model is to address the shortcomings of the existing technology by providing a material feeder for AKD steel strip granulation that can solve the problem of material overflow and optimize and improve product quality without changing the overall equipment layout and complex process flow.

[0007] The technical problem to be solved by this utility model is achieved through the following technical solution: a feeder for AKD steel strip granulation, the feeder includes a feed roller, the feed roller is located above the steel strip of the steel strip granulator, the two ends of the feed roller are horizontally mounted on the support frame of the steel strip granulator through bearing seats, one end face of the feed roller has a feed port and is set as the feed end, the other end is set as the transmission end connected to an external rotating power mechanism, the outer peripheral surface between the feed end and the transmission end of the feed roller has a discharge hole for feeding material onto the steel strip, and a pair of overflow material blocking mechanisms are also installed on the outer peripheral surfaces of both ends of the feed roller, each of the overflow material blocking mechanisms includes;

[0008] The baffle is flanged and sleeved on the outer circumferential surface of the fabric roller. The baffle is flanged and close to the bearing seat and located directly above the edge of the steel strip.

[0009] The variable diameter stop has its larger outer diameter end fixed to the end face of the baffle flange, and its other end face facing the middle of the fabric roller.

[0010] The axis of the baffle flange and the axis of the variable diameter block are collinear with the axis of the fabric roller, so as to guide the excess material overflowing from both ends of the fabric roller to the baffle flange and let it drip onto the steel strip of the fabric distributor by its own weight.

[0011] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the above-mentioned feeder for AKD steel strip granulation has a pair of overflow blocking mechanisms symmetrically arranged on the outer circumferential surfaces of both ends of the feed roller.

[0012] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the above-mentioned feeder for AKD steel strip granulation, wherein the baffle flange is formed into a roughly circular sheet structure.

[0013] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the feeder for AKD steel strip granulation described above, wherein the variable diameter stop is formed into a roughly frustum-shaped structure.

[0014] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the feeder for AKD steel strip granulation described above has a frustum-shaped variable diameter stop block whose lower bottom surface outer diameter is greater than its upper bottom surface outer diameter and smaller than the outer diameter of the baffle flange, and the upper bottom surface outer diameter of the frustum-shaped variable diameter stop block is equal to the outer diameter of the feed roller.

[0015] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the feeder for AKD steel strip granulation described above has an obtuse angle between the generatrix of the frustum-shaped variable diameter stop and the axis of the feed roller.

[0016] Compared with the prior art, the beneficial technical effects of this utility model are as follows: by adding an overflow material blocking mechanism at both ends of the fabric roller, the problem of AKD material overflowing from both ends during the fabrication process is effectively solved, the formation of long strip-shaped defective materials is avoided, the risk of manual intervention and the introduction of black impurities is reduced, and the product quality is significantly improved. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0018] Figure 2 for Figure 1 A partially enlarged structural diagram.

[0019] Reference numerals: 1. Fabric roller; 2. Steel belt; 3. Bearing housing; 4. Support frame; 5. Baffle flange; 6. Variable diameter stop block. Detailed Implementation

[0020] The specific technical solutions of this utility model are further described below with reference to the accompanying drawings, so as to enable those skilled in the art to further understand this utility model, without constituting a limitation on its rights.

[0021] Example 1, referring to Figure 1-2 A feeder for AKD steel strip pelletizing includes a feed roller 1. The structure of the feed roller 1 is existing technology and can be selected according to usage requirements; therefore, its operating principle and specific structural relationships will not be elaborated here. The feed roller 1 is located above the steel strip 2 of the steel strip pelletizer. The steel strip 2 is the steel strip 2 of the existing steel strip pelletizer. Both ends of the feed roller 1 are horizontally mounted on the support frame 4 of the steel strip pelletizer via bearing seats 3. The support frame 4 of the steel strip pelletizer is formed into a roughly square frame structure. One end of the feed roller 1... The end face has a feed port and is set as the feed end, and the other end is set as the transmission end connected to an external rotating power mechanism (not shown in the figure). The transmission method can be selected according to the usage requirements. The outer peripheral surface between the feed end and the transmission end of the fabric roller 1 has a material leakage hole for feeding onto the steel strip 2. The material leakage hole can be a round hole. A pair of overflow material blocking mechanisms are also installed on the outer peripheral surfaces of both ends of the fabric roller 1. The pair of overflow material blocking mechanisms are symmetrically arranged on the outer peripheral surfaces of both ends of the fabric roller 1. Each of the overflow material blocking mechanisms includes:

[0022] The baffle flange 5 is sleeved on the outer circumferential surface of the fabric roller 1. The baffle flange 5 is close to the bearing seat 3 and located directly above the edge of the steel strip 2. The baffle flange 5 is formed into a roughly circular sheet structure, and its thickness and width can be selected according to the usage requirements.

[0023] The variable diameter stop 6 has one end face with a larger outer diameter fixed to the end face of the baffle flange 5, and the other end face facing the middle of the fabric roller 1. The variable diameter stop 6 is formed into a roughly frustum-shaped structure. The outer diameter of the lower bottom surface of the frustum-shaped variable diameter stop 6 is larger than the outer diameter of the upper bottom surface and smaller than the outer diameter of the baffle flange 5. Its specific outer diameter value can be selected according to the usage requirements. The outer diameter of the upper bottom surface of the frustum-shaped variable diameter stop 6 is equal to the outer diameter of the fabric roller 1. Its specific outer diameter value can be selected according to the usage requirements. The angle between the generatrix of the frustum-shaped variable diameter stop 6 and the axis of the fabric roller 1 is an obtuse angle. This angle can be selected according to the usage requirements, for example, 150°~165°.

[0024] The axis of the baffle flange 5 and the axis of the variable diameter stop block 6 are collinear with the axis of the fabric roller 1, so as to guide the excess material overflowing from both ends of the fabric roller 1 to the baffle flange 5 and let it drip onto the steel strip 2 of the fabric distributor by its own weight.

[0025] By using the feeder in Example 1, compared with the traditional feeder, on the one hand, it can significantly reduce the amount of AKD material dripping to the outer areas of both ends of the feed roller 1, i.e. the outer area of ​​the steel strip 2, and on the other hand, it can also reduce the amount of AKD material overflowing to the two ends of the feed roller 1, reduce the time required for manual removal of this excess material, and minimize the impact on continuous production.

Claims

1. A feeder for AKD steel strip granulation, comprising a feed roller located above the steel strip of the steel strip granulator, both ends of the feed roller being horizontally mounted on the support frame of the steel strip granulator via bearing seats, one end face of the feed roller having a feed inlet and being configured as a feed end, and the other end being configured as a transmission end connected to an external rotary power mechanism, the outer circumferential surface between the feed end and the transmission end of the feed roller having a discharge hole for feeding material onto the steel strip, characterized in that: A pair of overflow material blocking mechanisms are also installed on the outer circumferential surfaces at both ends of the fabric roller, and each of the overflow material blocking mechanisms includes; The baffle is flanged and sleeved on the outer circumferential surface of the fabric roller. The baffle is flanged and close to the bearing seat and located directly above the edge of the steel strip. The variable diameter stop has its larger outer diameter end fixed to the end face of the baffle flange, and its other end face facing the middle of the fabric roller. The axis of the baffle flange and the axis of the variable diameter block are collinear with the axis of the fabric roller, so as to guide the excess material overflowing from both ends of the fabric roller to the baffle flange and let it drip onto the steel strip of the fabric distributor by its own weight.

2. A distributor for pelletizing AKD steel strip according to claim 1, characterized in that: The overflow blocking mechanisms described above are symmetrically arranged on the outer circumferential surfaces of both ends of the fabric roller.

3. The distributor for AKD steel strip granulation according to claim 1, characterized in that: The flange of the baffle is formed into a roughly circular sheet structure.

4. The distributor for AKD steel strip granulation according to claim 1, characterized in that: The variable diameter stop is formed into a roughly frustum-shaped structure.

5. A distributor for pelletizing AKD steel strip according to claim 4, characterized in that: The outer diameter of the lower bottom surface of the frustum-shaped variable diameter stop is greater than the outer diameter of the upper bottom surface and less than the outer diameter of the flange of the baffle. The outer diameter of the upper bottom surface of the frustum-shaped variable diameter stop is equal to the outer diameter of the fabric roller.

6. A distributor for pelletizing AKD steel strip according to claim 4, characterized in that: The angle between the generatrix of the frustum-shaped variable diameter stop and the axis of the fabric roller is an obtuse angle.

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