Continuous preparation device for surface sizing starch

Abstract

The utility model discloses a surface sizing starch continuous preparation device, and belongs to the technical field of pulping and papermaking equipment. In the prior art, in the surface sizing corn starch preparation process, a weighing machine intermittent metering and inclined spiral feeding mode is adopted, the problem of unstable dissolution concentration exists, and the viscosity fluctuation of starch glue liquid in the subsequent enzyme conversion process is large. The device comprises a starch bin, a feeder, a straight feeding screw, an electric vibrator, a clear water pipe and a dissolving tank, the electric vibrator is mounted at the bottom of the starch bin, the feeding end of the straight feeding screw is connected with the feeder, and the discharging end of the straight feeding screw is connected with the dissolving tank. According to the device, uniform and stable discharging of the stock bin is ensured through the electric vibrator, and continuous feeding is achieved by replacing an inclined screw with a straight feeding screw. The continuous and stable dissolution preparation of starch is realized, the viscosity fluctuation range is reduced from + / -10mPa. S to + / -2mPa. S, and the paper surface sizing effect and the product quality stability are obviously improved.

Description

Technical Field

[0001] This utility model relates to the field of papermaking technology, and in particular to a continuous preparation device for surface-sizing starch. Background Technology

[0002] In the pulp and paper industry, surface sizing technology is a crucial process for improving paper surface properties. Corn starch, as a primary surface sizing agent, is widely used in the production of various types of paper. Surface sizing corn starch requires processes such as dissolution and enzymatic conversion to prepare a sizing solution with appropriate viscosity and rheological properties. The quality of this sizing solution directly affects the surface strength, printability, and final product quality of the paper. With the increasing demands for product quality and continuous optimization of production efficiency in the paper industry, the stability and continuity of the surface sizing starch preparation system have become key technical factors influencing the overall operation of the production line.

[0003] Currently, the surface-sizing corn starch preparation systems commonly used in industrial production rely primarily on intermittent metering using weighing devices, combined with a slanted screw feeder to transport the starch to a dissolving device for mixing with water. This traditional preparation method has significant technical drawbacks in actual production. The intermittent operation of the weighing device leads to discontinuous starch supply; each metering cycle is approximately 20 seconds, and frequent start-stop operations cause periodic fluctuations in starch flow. Simultaneously, the slanted screw feeder is affected by gravity, resulting in poor conveying stability under different operating conditions, further exacerbating the unevenness of starch supply.

[0004] The direct consequence of existing technologies is the instability of starch concentration, with fluctuations typically reaching ±10 mPa·s. This fluctuation directly impacts subsequent enzymatic conversion processes, leading to significant variations in the viscosity of the starch solution. This viscosity instability severely affects the uniformity and effectiveness of sizing on the paper surface, resulting in inconsistent paper product quality and increasing the difficulty of quality control and raw material consumption during production. Therefore, developing a technology that enables continuous and stable starch dissolution and preparation, addressing the issues of concentration fluctuations and viscosity instability in existing systems, is of significant practical value for improving production efficiency and product quality in the papermaking industry. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a continuous preparation device for surface-applied starch.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A continuous starch preparation device for surface sizing includes a starch silo, a feeder, a water pipe, and a dissolving tank. It also includes a straight-feed screw and an electric vibrator. The electric vibrator is installed at the bottom of the starch silo. The feed end of the straight-feed screw is connected to the feeder, and the discharge end of the straight-feed screw is connected to the dissolving tank. The water pipe is connected to the conveying channel of the straight-feed screw.

[0008] Preferably, the straight-feed screw is arranged horizontally.

[0009] Preferably, the electric vibrator is fixedly connected to the bottom wall of the starch silo.

[0010] Furthermore, the feeder is located at the outlet of the starch silo.

[0011] Furthermore, the straight-feed screw has a constant pitch screw structure.

[0012] Preferably, the clean water pipe is equipped with a flow control valve.

[0013] Preferably, there is a gap between the spiral blades of the straight feed spiral and the wall of the conveying pipe.

[0014] Preferably, the inlet of the dissolving tank is directly connected to the outlet of the straight feed screw.

[0015] The beneficial effects of this utility model are as follows:

[0016] This invention significantly improves the stability of the surface-sizing starch preparation process and the consistency of product quality by replacing the traditional intermittent weighing and inclined screw feeding method with a straight-feed screw continuous feeding system equipped with an electric vibrator. This technical solution effectively eliminates the 20-second start-stop cycle operation of the original system, achieving continuous and stable dissolution of corn starch. This reduces the viscosity fluctuation range of the starch solution from ±10 mPa·s to ±2 mPa·s, improving viscosity control accuracy by 80%. This ensures the stability of the subsequent enzymatic conversion process, ultimately achieving uniform surface sizing of paper and a high degree of consistency in the quality of the finished paper product, providing reliable technical support and economic benefits for paper manufacturing enterprises.

[0017] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the improved design structure of a continuous surface-sizing starch preparation device proposed in this utility model;

[0019] Figure 2 This is a schematic diagram of the prior art of a continuous surface-applied starch preparation device proposed in this utility model.

[0020] In the diagram: 1. Starch silo; 2. Feeder; 3. Weigher; 4. Inclined feed auger; 5. Clean water pipe; 6. Dissolving tank; 7. Straight feed auger; 8. Electric vibrator. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Example 1, referring to Figures 1 to 2 A continuous surface-sizing starch preparation device, as proposed in this invention, employs an innovative continuous feeding and dissolving system design. The device mainly consists of a starch silo 1, a feeder 2, a straight-feed screw 7, an electric vibrator 8, a clean water pipe 5, and a dissolving tank 6. Compared to traditional designs, this device eliminates the original weighing device 3 and inclined feeding screw 4, replacing them with a straight-feed screw 7 system equipped with an electric vibrator 8, thus achieving continuous and stable feeding and dissolving of corn starch.

[0023] An electric vibrator 8 is installed at the bottom of the starch silo 1. This vibrator generates regular vibrations to ensure uniform feeding of corn starch within the silo, effectively preventing uneven feeding caused by starch clumping or bridging. The corn starch enters the straight-feed screw 7 from the bottom of the silo 1 via the feeder 2. The straight-feed screw 7 adopts a constant pitch design to ensure continuous feeding of the starch at a constant rate. During the feeding process of the straight-feed screw 7, clean water is precisely metered through the clean water pipe 5 and mixed synchronously with the starch. The two undergo preliminary mixing during screw feeding, and then enter the dissolving tank 6 to complete the final dissolving process.

[0024] Working principle

[0025] The device operates on the principle of synergistic action between continuous feeding and precise proportioning. The mechanical vibration generated by the electric vibrator 8 disrupts the static friction and cohesion between starch granules, ensuring the corn starch in the hopper 1 maintains good flowability and thus guaranteeing stable gravity feeding. Upon receiving a continuous and stable starch flow, the feeder 2 controls the starch supply by adjusting the feed rate. Compared to the original inclined feed screw 4, the straight-feed screw 7 offers better conveying stability. Its horizontal arrangement reduces uneven conveying caused by changes in gravity, and the screw's rotation frequency can be precisely adjusted to achieve accurate control of the starch flow rate.

[0026] During the dissolution process, the water pipe 5 precisely measures the amount of water used via a flow control valve. The mixing ratio with starch can be precisely controlled by adjusting the speed of the direct feed screw 7 and the water flow rate, thus ensuring the stability of the starch solution concentration after dissolution. Eliminating the intermittent metering method of the weighing device 3 eliminates the 20-second start-stop cycle of the original system, achieving true continuous production and avoiding concentration fluctuations caused by frequent start-stop cycles. This continuous process significantly reduces the viscosity fluctuation range of the starch solution from ±10 mPa·s to ±2 mPa·s, greatly improving the stability of the subsequent enzymatic conversion process and the consistency of the final sizing effect on the paper surface. The entire system operates fully automatically through electrical control; operators only need to set the process parameters, and the system automatically maintains a stable production state.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A continuous preparation device for surface-applied starch, comprising a starch silo (1), a feeder (2), a clean water pipe (5), and a dissolving tank (6), characterized in that: It also includes a straight feed screw (7) and an electric vibrator (8). The electric vibrator (8) is installed at the bottom of the starch silo (1). The feed end of the straight feed screw (7) is connected to the feeder (2). The discharge end of the straight feed screw (7) is connected to the dissolving tank (6). The clean water pipe (5) is connected to the conveying channel of the straight feed screw (7).

2. The continuous preparation apparatus for surface-sizing starch according to claim 1, characterized in that: The straight feed screw (7) is arranged horizontally.

3. The continuous preparation apparatus for surface-sizing starch according to claim 1, characterized in that: The electric vibrator (8) is fixedly connected to the bottom wall of the starch silo (1).

4. The continuous preparation apparatus for surface-sizing starch according to claim 1, characterized in that: The feeder (2) is located at the outlet of the starch silo (1).

5. The continuous preparation apparatus for surface-sizing starch according to claim 1, characterized in that: The straight feed screw (7) has a constant pitch screw structure.

6. The continuous preparation apparatus for surface-sizing starch according to claim 1, characterized in that: The water pipe (5) is equipped with a flow control valve.

7. The continuous preparation apparatus for surface-sizing starch according to claim 1, characterized in that: The straight feed screw (7) has a gap between its spiral blades and the conveying pipe wall.

8. The continuous preparation apparatus for surface-sizing starch according to claim 1, characterized in that: The inlet of the dissolving tank (6) is directly connected to the outlet of the straight feed screw (7).

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