Cleaning system for self-made starch in surface sizing

Abstract

The utility model discloses a cleaning system for self-made starch in surface sizing, which comprises a dry powder feeding bin, a starch mixing tank and a sizing material storage tank, and a concentration regulating tank and a steam-water separator are sequentially connected between the starch mixing tank and the sizing material storage tank through pipelines; the pipeline between the starch mixing tank and the steam-water separator is also sequentially connected with a first-section heating module and a second-section heating module which are respectively used for carrying out first-section heating cooking and second-section cooking inactivation on the self-made starch; the pipeline between the steam-water separator and the sizing material storage tank is further in branch connection with a circulating backflow pipeline used for backflow of the cleaning solution, and the tail end of the backflow pipeline is connected with a cleaning agent mixing tank used for recycling the cleaning solution in the cleaning process and used for dilution and concentration adjustment of liquid medicine before cleaning; a circulating cleaning pipeline is connected between the discharging end of the cleaning agent mixing tank and the feeding hole of the starch mixing tank; circulating cleaning of tanks and pipelines in surface sizing is achieved through the cleaning agent mixing tank and the circulating backflow pipeline.

Description

TECHNICAL FIELD

[0001] The utility model relates to surface sizing in starch pipeline's cleaning technology, especially, relate to a kind of for surface sizing in self-made starch cleaning system.

BACKGROUND

[0002] Surface sizing refers to the wet paper web is removed part moisture (the moisture content of existing drying part is generally 4~10%) to fixed value when, the process of evenly coating appropriate sizing material on paper surface, general coating amount is 0.2~3g / m 2 Surface sizing can improve the void structure and absorption performance of paper and adaptability.

[0003] The most commonly used reinforcing agent for surface sizing is starch, and the commonly used raw materials are corn, wheat, potato, cassava and barley, etc. Among them, cassava starch is preferred due to its stable properties, controllable viscosity and relatively low price. However, the price of oxidized cassava starch is relatively high, and the viscosity cannot be freely adjusted. Therefore, using cassava starch as a cost-saving and viscosity-controlling raw material through a self-made starch system is selected by various manufacturers.

[0004] However, cassava starch is produced by directly and simply cleaning, crushing and drying agricultural crops, without chemical reaction and multi-stage slag removal process. Therefore, cassava starch contains a lot of impurities, which can cause scaling on the tank and pipeline wall after running, greatly affecting the quality of the paste after gelatinization. Moreover, because the impurities in the tank and pipeline are soaked by the gelatinization liquid, they can become loose and appear on the paper surface, greatly affecting the quality of the finished paper and the uniformity of the coating. Furthermore, it can cause pressure injury to the coating roller and even cause the risk of paper breakage.

[0005] Therefore, in view of the above problems, in surface sizing, there is an urgent need for a complete cleaning system to effectively clean the impurities in the self-made starch using cassava starch.

UTILITARY MODEL CONTENT

[0006] The utility model provides a kind of for surface sizing in self-made starch cleaning system, by closed loop, it is backflowed to cleaning agent mixing tank to realize closed loop self-made starch and long time cleaning of circulation, effectively improve the quality and production efficiency of surface sizing.

[0007] The technical solution adopted by the utility model to solve its technical problems is:

[0008] A cleaning system for self-made starch in surface sizing, for circulating cleaning of tank and pipeline in surface sizing, comprising a dry powder feeding bin for automatic feeding of cassava raw starch, a starch mixing tank for uniform mixing and dispersion of cassava raw starch fed by pipeline from the dry powder feeding bin, and a sizing material storage tank for storage of starch slurry before surface sizing, after uniform mixing and separation after cooking;

[0009] A concentration tank for concentration of mixed starch and a steam-water separator for separation of sizing material solution after cooking and steam after enzyme inactivation are connected in sequence by pipeline between the starch mixing tank and the sizing material storage tank.

[0010] A first heating module and a second heating module for one-stage heating cooking and two-stage cooking inactivation of self-made starch are connected in sequence by pipeline between the starch mixing tank and the steam-water separator.

[0011] A circulating backflow pipeline for backflow of cleaning solution when the starch mixing tank, the concentration tank and the steam-water separator are cleaned by cleaning agent is branched and connected by pipeline between the steam-water separator and the sizing material storage tank, an end of the circulating backflow pipeline is connected with a cleaning agent mixing tank located beside the starch mixing tank, for recycling cleaning solution during cleaning and dilution and concentration of cleaning agent before cleaning, a circulating cleaning pipeline for circulating cleaning of cleaning agent into the starch mixing tank, the concentration tank and the steam-water separator in sequence is connected between the discharge end of the cleaning agent mixing tank and the inlet of the starch mixing tank.

[0012] A first stop valve is arranged on the pipeline corresponding to the inlet of the sizing material storage tank, for controlling opening and closing of the pipeline, preventing cleaning solution from the steam-water separator backflowing into the sizing material storage tank.

[0013] Preferably, a first heating module for heating, diluting and dissolving organic salt cleaning agent, facilitating cleaning of scale in pipelines and tanks at the optimum working temperature is arranged on the pipeline corresponding to the discharge end of the cleaning agent mixing tank.

[0014] Preferably, a second heating module for secondary heating of organic salt cleaning agent, facilitating cleaning of scale in pipelines and tanks at the optimum working temperature is arranged on the pipeline between the starch mixing tank and the concentration tank.

[0015] Preferably, the circulating backflow pipeline corresponding to the back material port of the cleaning agent mixing tank is further branched and connected with a branch backflow pipeline for directly circulating backflow of the cleaning liquid into the starch mixing tank, the starch mixing tank serving as a cleaning agent concentration tank for dilution and concentration of the cleaning liquid when cleaning the scale in the pipeline and tank by the cleaning liquid, and a second stop valve for controlling opening and closing of the branch backflow pipeline is arranged on the branch backflow pipeline.

[0016] The utility model has the advantages of:

[0017] The circulating backflow pipeline for backflow of the cleaning liquid of the starch mixing tank, the concentration tank and the steam-water separator is branched and connected with the cleaning agent mixing tank, and the circulating cleaning pipeline is connected between the discharging end of the cleaning agent mixing tank and the feeding port of the starch mixing tank, so that the cleaning liquid is circulated into the starch mixing tank, the concentration tank and the steam-water separator in sequence for circulating cleaning.

[0018] Meanwhile, the solvent primary heating module, the solvent secondary heating module, the first-stage heating module and the second-stage heating module can heat the organic salt cleaning agent, so that the cleaning solution can clean the scale in the pipeline and tank at the optimal working temperature of 60-70 DEG C, and the cleaning efficiency is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is the system principle schematic view of the utility model; DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the utility model.

[0021] In the description of the utility model, it should be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be mechanical connection, or electrical connection, it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0022] In the description of the utility model, need understanding is, the term "first", "second" and so on only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one feature.

[0023] A cleaning system for self-made starch in surface sizing, as shown in Figure 1 For the circulating cleaning of tank and pipeline in surface sizing, including dry powder feeding bin 1, starch mixing tank 2 and sizing material storage tank 3, dry powder feeding bin 1 is used for automatically feeding cassava raw starch, starch mixing tank 2 is used for uniformly mixing and dispersing the cassava raw starch fed by dry powder feeding bin 1 through pipeline, and sizing material storage tank 3 is used for storing the starch slurry before surface sizing, after uniform mixing and separation after cooking. The pipeline between the starch mixing tank 2 and the sizing material storage tank 3 is sequentially connected with a concentration tank 4 for adjusting the concentration of the mixed starch and a steam-water separator 5 for separating the sizing material solution after enzyme inactivation and steam after cooking. The pipeline between the starch mixing tank 2 and the steam-water separator 5 is also sequentially connected with a first heating module 6 for one-stage heating cooking and a second heating module 7 for two-stage cooking inactivation. The pipeline between the steam-water separator 5 and the sizing material storage tank 3 is also branched connected with a circulating backflow pipeline 8 for backflow of cleaning solution when the starch mixing tank 2, the concentration tank 4 and the steam-water separator 5 are cleaned by cleaning agent. The end of the circulating backflow pipeline 8 is connected with a cleaning agent mixing tank 9 located beside the starch mixing tank 2, which is used for recycling cleaning solution during cleaning and diluting and concentrating the cleaning agent before cleaning. The outlet end of the cleaning agent mixing tank 9 and the inlet of the starch mixing tank 2 are also connected with a circulating cleaning pipeline 10 for circulating cleaning of the cleaning agent sequentially into the starch mixing tank 2, the concentration tank 4 and the steam-water separator 5. A first stop valve 11 is arranged on the pipeline corresponding to the inlet of the sizing material storage tank 3 to control the opening and closing of the pipeline and prevent the cleaning solution from flowing back from the steam-water separator 5 to the circulating backflow pipeline 8 and entering the sizing material storage tank 3.

[0024] Continue as Figure 1 As shown, a first heating module 12 is arranged on the pipeline corresponding to the outlet end of the cleaning agent mixing tank 9 to heat, dilute and dissolve the organic salt cleaning agent, which is convenient for cleaning the scaling in the pipeline and tank at the optimal working temperature. A second heating module 13 is also arranged on the pipeline between the starch mixing tank 2 and the concentration tank 4 to heat the organic salt cleaning agent, which is convenient for cleaning the scaling in the pipeline and tank at the optimal working temperature.

[0025] Continue as Figure 1As shown, the recycling return pipeline 8 corresponding to the return opening of the cleaning agent mixing tank 9 is also branched and connected with a branch return pipeline 14 for directly recycling the cleaning liquid into the starch mixing tank 2. When the cleaning agent mixing tank 9 is occupied, when it is necessary to clean the scaling in the pipeline and tank by the cleaning liquid, the starch mixing tank 2 serves as a cleaning agent concentration tank for diluting and concentrating the cleaning liquid, and the cleaning liquid in the starch mixing tank 2 is sequentially circulated into the starch mixing tank 2, the concentration tank 4 and the steam-water separator 5 for recycling cleaning. Correspondingly, the second stop valve 15 for controlling the opening and closing of the branch return pipeline 14 is arranged.

[0026] In this embodiment, the valve and pipeline leading to the cleaning agent mixing tank are added to the steam-water separator leading to the rubber storage tank, forming an effective passage, solving the problem that the existing starch system cannot be cleaned in a single loop. At the same time, in order to achieve better cleaning effect, the organic salt cleaning agent can be heated by the solvent primary heating module, the solvent secondary heating module, the first-stage heating module and the second-stage heating module, so as to facilitate the cleaning solution to clean the scaling in the pipeline and tank at the optimal working temperature of 60-70℃. Moreover, during cleaning, the frequency of the pump is opened to the maximum, which can increase the contact area of the cleaning liquid with the pipeline, better clean the impurities in the pipeline, and stop the cleaning liquid above the rubber storage tank, reducing the reaction problem caused by the cleaning liquid flushing residue with the raw materials.

[0027] The above-described embodiments are only preferred embodiments of the present application, and do not limit the scope of the present application. Any equivalent changes made in shape, structure and principle according to the present application should be covered within the scope of protection of the present application.

Claims

1. A cleaning system for self-made starch in surface sizing, used for the circulating cleaning of tanks and pipelines in surface sizing, characterized in that, It includes a dry powder feeding hopper, a starch mixing tank, and a sizing tank. The dry powder feeding hopper is used for automatically feeding cassava starch. The starch mixing tank is used to evenly mix and disperse the cassava starch fed from the dry powder feeding hopper through pipeline with water. The sizing tank is used for storing starch slurry before surface sizing, after even mixing, and after cooking and separation. The starch mixing tank and the gum storage tank are connected in sequence by pipelines to a concentration tank for adjusting the concentration of the mixed starch and a steam-water separator for separating the gum solution and steam after starch cooking enzyme inactivation. The pipeline between the starch mixing tank and the steam-water separator is also connected in sequence to a first-stage heating module and a second-stage heating module for performing first-stage heating and cooking and second-stage cooking and inactivation on the self-made starch, respectively. The pipeline between the steam-water separator and the adhesive storage tank is also branched into a circulation return pipeline for the return of cleaning solution when the starch mixing tank, the concentration tank, and the steam-water separator are cleaned with cleaning agent. The end of the circulation return pipeline is connected to a cleaning agent mixing tank located next to the starch mixing tank, which is used to circulate and recover the cleaning solution during the cleaning process and to dilute and concentrate the solution before cleaning. A circulation cleaning pipeline is connected between the outlet of the cleaning agent mixing tank and the inlet of the starch mixing tank for the cleaning solution to circulate sequentially into the starch mixing tank, the concentration tank, and the steam-water separator for circulatory cleaning. A first shut-off valve is installed on the pipeline corresponding to the inlet of the rubber storage tank to control the on / off of the pipeline and prevent the cleaning fluid flowing back from the steam-water separator to the circulating return pipeline from entering the rubber storage tank.

2. The cleaning system for self-made starch in surface sizing according to claim 1, characterized in that: The pipeline corresponding to the discharge end of the cleaning agent mixing tank is also equipped with a solvent primary heating module for heating, diluting and dissolving organic salt cleaning agents, facilitating the cleaning of scale buildup in the pipeline and tank at the optimal operating temperature.

3. The cleaning system for self-made starch in surface sizing according to claim 1, characterized in that: The pipeline between the starch mixing tank and the concentration tank is also equipped with a solvent secondary heating module for secondary heating of organic salt cleaning agents, which facilitates cleaning of scale in the pipeline and tank at the optimal operating temperature.

4. A cleaning system for self-made starch in surface sizing according to claim 1, characterized in that: The circulating return pipeline corresponding to the return port on the cleaning agent mixing tank is also branched to a branch return pipeline for direct circulation of the cleaning liquid back to the starch mixing tank. When the cleaning liquid cleans the scale in the pipeline and tank, the starch mixing tank serves as a cleaning agent concentration tank for diluting and concentrating the cleaning solution. A second shut-off valve for controlling the opening and closing of the pipeline is installed on the branch return pipeline.

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