CN216879141U

CN216879141U - Starch preparation device with automatic flushing function

Info

Publication number: CN216879141U
Application number: CN202123154825.3U
Authority: CN
Inventors: 汪文祥; 冯春; 张佳珺; 袁佑铭; 张裕福; 沈国栋
Original assignee: China Haisum Engineering Co Ltd
Current assignee: China Haisum Engineering Co Ltd
Priority date: 2021-12-15
Filing date: 2021-12-15
Publication date: 2022-07-05
Anticipated expiration: 2031-12-15

Abstract

The utility model discloses a starch preparation device with an automatic flushing function, which comprises a starch bin, a starch dissolving tank, a starch cooking delivery pump, a digester, a starch reaction tank, a starch inactivation delivery pump, an inactivator and a starch storage tank which are sequentially connected, wherein the top of the starch dissolving tank is communicated with a first clear water pipe, the inlet end of the starch cooking delivery pump is also communicated with a second clear water pipe, the inlet end of the starch inactivation delivery pump is also communicated with a third clear water pipe, the digester is communicated with the first steam pipe, and the inactivator is communicated with the second steam pipe. The utility model is automatically controlled in the whole process by a control system, and the dissolution concentration of the starch, the starch cooking time and temperature, the reaction time after the starch cooking and the starch inactivation time can be automatically controlled on line. After the starch is prepared, the whole system can be automatically cleaned, and the system is kept clean.

Description

Starch preparation device with automatic flushing function

Technical Field

The utility model relates to a starch preparation system with an automatic flushing function, which is suitable for a papermaking starch preparation process, improves the cleanliness of a system pipeline, and belongs to the technical field of papermaking.

Background

At present, the total yield of starch in the world reaches more than 2000 million tons, and the starch is widely applied to the aspects of papermaking, food, textile, medicine, chemical industry and the like, wherein the consumption of the papermaking industry is the largest. Papermaking starch accounts for 63% of the total yield in the united states and 58.5% in the european union.

In the papermaking auxiliary agent, the starch can enhance the internal binding force and the surface strength of paper surface fibers, improve the printing performance and obviously improve the paper quality. Can obviously improve various physical strengths of paper, improve quality and grade, reduce wood pulp proportion and improve retention of fine fibers and fillers.

The preparation of starch is that after the raw starch is emulsified, a certain amount of enzyme is added to prepare starch liquid, and the starch liquid is gelatinized into starch colloidal liquid with a certain viscosity under the heating of high-temperature steam. The gelatinization process requires precise control of the amount of steam and amylase added and requires periodic cleaning of the system to keep the pipeline clean.

In the existing starch cooking system, indirect cooking and continuous cooking are available. The intermittent cooking equipment has the advantages of simple flow and flexible operation, and most of domestic old production lines are still used. The disadvantages of intermittent cooking are high steam consumption, high working strength, low yield, difficult control of cooking conditions, easy agglomeration of starch, easy fluctuation of viscosity, low starch gelatinization efficiency, and affected dispersion and application performance of the paste. The newly-built production line mostly adopts continuous cooking equipment and is characterized by high production capacity, stable quality, high automation degree and low labor intensity.

At present, most starch cooking systems are generally cleaned or not cleaned manually when stopped, so that starch colloidal liquid with high viscosity is easily attached to the inner wall of a pipeline, and when the system is restarted, because attachments on the inner wall of the pipeline are increased, normal flow of fluid is blocked, and the pipeline is often blocked. In most of the starch preparation systems, accurate temperature control is difficult, the viscosity of the starch solution is suddenly increased, and the phenomenon of pipeline blockage is also caused.

Disclosure of Invention

The technical problem to be solved by the utility model is as follows: in the starch preparation process, how to realize accurate and controllable continuous cooking in the production process, and carry out full-automatic cleaning of pipelines when the machine is stopped, thereby ensuring the clean and efficient work of the whole system.

In order to solve the problems, the technical scheme of the utility model is as follows: the utility model provides a take automatic washing function's starch preparation facilities, it is including the starch feed bin, starch dissolving tank, starch digestion delivery pump, boiling device, starch reaction tank, starch inactivation delivery pump and inactivator, the starch hold up tank that connect gradually, starch dissolving tank top intercommunication has clean water pipe one, the entry end of starch digestion delivery pump still communicates with two clean water pipes, the entry end of starch inactivation delivery pump still communicates with three clean water pipes, boiling device and steam pipeline one intercommunication, inactivator and two intercommunications of steam pipeline.

Preferably, valves are arranged on the clean water pipe I, the clean water pipe II, the clean water pipe III, the steam pipeline I and the steam pipeline II; valves are arranged on a connecting pipeline between the starch dissolving tank and the starch cooking conveying pump and a connecting pipeline between the starch reaction tank and the starch inactivation conveying pump; all valves, the starch cooking delivery pump and the starch inactivation delivery pump are controlled by a control system.

Preferably, the bottom of the starch bin is connected with the starch dissolving tank through a screw feeder.

Preferably, stirrers are arranged in the starch dissolving tank, the starch reaction tank and the starch storage tank.

Preferably, the liquid level of the reaction liquid in the starch reaction tank is 65-75%.

The whole production process of the utility model is automatically controlled by DCS, the solid content and gelatinization temperature of starch can be accurately controlled, the viscosity of starch liquid is monitored on line, and the gelatinization process is automatically adjusted, so that the viscosity in the whole system is always controlled in a controllable range. And when the system is stopped, the DCS can control the automatic cleaning and flushing of the pipeline. The warm water from the warm water pipeline is pumped by the screw pump to wash the digester and subsequent pipelines, and the starch colloidal fluid is conveyed into the reaction tank for temporary storage. And (4) after the reaction tank, the pipeline is flushed by warm water and then sent to a storage tank for storage. If the system needs to be shut down for a long time, the temperature in the system can be naturally cooled and reduced, the viscosity of the starch jelly can be sharply increased, the system can discharge the starch jelly in a system pipeline in a warm water cleaning mode when the system is shut down, the cleanliness of the whole pipeline system can be effectively guaranteed, and the common problem of blockage in the starch preparation process is avoided.

The utility model can keep the whole system in a stable and clean state all the time no matter in the production process or when the system is stopped.

Drawings

FIG. 1 is a schematic view of a starch preparation apparatus with an automatic washing function according to the present invention.

Detailed Description

In order to make the utility model more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.

Examples

As shown in attached figure 1, the starch preparation device with the automatic flushing function provided by the utility model comprises a starch bin 1, a starch dissolving tank 2, a starch cooking delivery pump 3, a digester 4, a starch reaction tank 5, a starch inactivation delivery pump 6, an inactivator 7 and a starch storage tank 8 which are connected in sequence. The bottom of the starch bin 1 is connected with a starch dissolving tank 2 through a screw feeder. The top of the starch dissolving tank 2 is communicated with a first clean water pipe 9, the inlet end of the starch cooking delivery pump 3 is also communicated with a second clean water pipe 10, the inlet end of the starch inactivation delivery pump 6 is also communicated with a third clean water pipe 11, the boiler 4 is communicated with a first steam pipeline 12, and the inactivator 7 is communicated with a second steam pipeline 13. Valves are arranged on the clean water pipe I9, the clean water pipe II 10, the clean water pipe III 11, the steam pipeline I12 and the steam pipeline II 13; valves are arranged on a connecting pipeline between the starch dissolving tank 2 and the starch cooking conveying pump 3 and a connecting pipeline between the starch reaction tank 5 and the starch inactivation conveying pump 6; all valves are controlled by a control system. And stirrers are arranged in the starch dissolving tank 2, the starch reaction tank 5 and the starch storage tank 8. The liquid level of the reaction liquid in the starch reaction tank 5 is 65-75%. The rotation speed of the stirrer of the starch dissolving tank 2 is 1200-1300 rpm.

The working process of the utility model is as follows: the raw starch is automatically fed into the starch dissolving tank 2 from the starch bin 1, the first clear water pipe 9 is opened, the spiral rotating speed of the starch bin and the feeding example of clear water are controlled by the control system, and meanwhile, the stirrer of the starch dissolving tank 2 starts to work to stir and dissolve. After the starch solution is completely dissolved, the starch cooking and conveying pump 3 starts to work, raw starch solution which is uniformly stirred and dissolved is pumped to the cooker 4, the raw starch solution instantly reaches a preset reaction temperature by calculating the relation between the pumping speed and the addition of steam, and then the raw starch solution is conveyed to the starch reaction tank 5 for gelatinization reaction. The residence time of the starch in the starch reaction tank 5 is precisely controlled by the starch inactivation delivery pump 6. After the gelatinized starch is inactivated by an inactivator 7, the gelatinization reaction is terminated and reaches a stable state to be stored in a starch storage tank 8 for subsequent working sections.

When the whole system is shut down, the starch bin 1 stops feeding, the first clear water pipe 9 is closed, the second clear water pipe 10 is opened when the starch dissolving tank 2 is completely exhausted, the second clear water pipe 10 is closed after a set time, the starch cooking delivery pump 3 stops working, and the cooker 4 is closed. And when the starch reaction tank 5 is completely exhausted, the clean water pipe III 11 is opened. After a certain set time, the clean water pipe II 11 is closed, the starch inactivation conveying pump 6 stops working, and the inactivator 7 is closed. So far, through the automatic control of the control system, each flushing pipeline is opened in a segmented mode, and the whole system pipeline is flushed in a full-automatic mode.

The starch automatic cleaning preparation device provided by the utility model provides an advanced control system and reliable overall equipment, has a compact and reasonable structural design and a full-automatic control system, the gelatinization reaction of the whole system can be accurately controlled, the gelatinization cooking reaction can be continuously and automatically controlled, and the quality of a starch paste liquid product is greatly improved. The dissolution concentration of the starch, the starch cooking time and temperature, the reaction time after the starch cooking and the starch inactivation time can be controlled on line and fully automatically. After the starch is prepared, the whole system can be automatically cleaned, and the system is kept clean.

The device has high production capacity and good starch dispersibility, can greatly improve the starch surface treatment effect, reduce the adhesion and accumulation of surface sizing starch in a paper machine, and improve the film forming uniformity and strength of a surface slow layer.

Claims

1. The utility model provides a take automatic washing function's starch preparation facilities, its characterized in that, including starch feed bin (1), starch dissolving tank (2), starch digestion delivery pump (3), boiler (4), starch reaction tank (5), starch inactivation delivery pump (6) and inactivator (7), starch holding vessel (8) that connect gradually, starch dissolving tank (2) top intercommunication has clean water pipe one (9), the entry end of starch digestion delivery pump (3) still communicates with clean water pipe two (10), the entry end of starch inactivation delivery pump (6) still communicates with clean water pipe three (11), boiler (4) and steam conduit one (12) intercommunication, inactivator (7) and steam conduit two (13) intercommunication.

2. The starch preparation device with automatic flushing function according to claim 1, wherein valves are arranged on the clean water pipe I (9), the clean water pipe II (10), the clean water pipe III (11), the steam pipeline I (12) and the steam pipeline II (13); valves are arranged on a connecting pipeline between the starch dissolving tank (2) and the starch cooking conveying pump (3) and a connecting pipeline between the starch reaction tank (5) and the starch inactivation conveying pump (6); all valves, the starch cooking delivery pump (3) and the starch inactivation delivery pump (6) are controlled by a control system.

3. The starch preparation apparatus with automatic washing function according to claim 1, wherein the bottom of the starch silo (1) is connected to the starch dissolving tank (2) by a screw feeder.

4. The starch preparation apparatus with automatic washing function according to claim 1, wherein the starch dissolving tank (2), the starch reaction tank (5) and the starch storage tank (8) are provided with a stirrer.

5. The starch preparation apparatus with automatic washing function according to claim 1, wherein the liquid level of the reaction liquid in the starch reaction tank (5) is 65-75%.