CN201379060Y - Tobacco Sheet Coating Fluid Filtration System - Google Patents

Abstract

The utility model discloses a tobacco flake coating fluid filtering system, which belongs to the technical field of tobacco flake production by papermaking. The technical proposal is: the tobacco sheet coating liquid filtration system comprises a coating liquid tank, a liquid storage tank, a coating roller and a backflow tank. A filter and a transition tank are set between the liquid storage tank and the coating roller. One end of the feed pipe is set at the lower part of the liquid storage tank, and the other end is connected to the upper end of the filter through a pump. The feed pipe goes directly to the transition tank, and the feed pipe at the lower end of the filter tank leads to the coating roller. The mesh number of the filter is 80-150 mesh, the working pressure is 0.4-0.6MPa, the flow rate is 2-3m ³ /min, and the temperature is 30-60°C. A feeding branch pipe connected with the transition tank is arranged in the feeding pipe connected with the filter. The utility model has reasonable design, simple structure, easy operation, improves the quality of the coating solution, provides continuous and stable production conditions, and helps to improve the quality of the tobacco sheet.

Description

Tobacco Sheet Coating Fluid Filtration System

technical field

The utility model belongs to the technical field of tobacco sheet production by a papermaking method, and in particular relates to a coating liquid filtering system for tobacco sheets.

Background technique

In the prior art, the tobacco sheet is to process tobacco waste such as tobacco stems, tobacco powder and low-grade tobacco leaves discarded in the cigarette production process to produce sheet-shaped tobacco regenerated raw materials that meet the requirements of the cigarette formula. The tobacco sheet is produced in a certain proportion Blended with natural tobacco leaves to make cigarettes. Its main significance is: to improve the utilization rate of tobacco raw materials, make full use of the waste in the cigarette production process; reduce the tar content of cigarettes, and improve the grade of cigarettes. The production of tobacco flakes can not only increase the economic benefits of enterprises, but also have good environmental benefits.

There are three main processes for manufacturing tobacco sheets, namely: roll pressing, thick pulp method and papermaking method, among which papermaking method is currently dominant because of its advantages in various aspects. The technological process is as follows: soaking tobacco stems, tobacco powder and low-grade tobacco leaves with water for a certain period of time, and then separating the solid and liquid in the soaking system. Among them, the solid phase is mainly insoluble fibers, which are made into paper-like substrates according to the papermaking process; the liquid phase is the extract solution containing soluble substances, which is concentrated and dip-coated on the substrate, and then dried and cut. Get tobacco flakes.

Sheet production In the dip-coating process, the concentrated leaching solution (that is, the coating solution) is coated on the substrate in a continuous reflux cycle, that is: liquid feeding-substrate dipping-coating solution reflux, Cycle like this.

The disadvantages of this production process are:

During the coating process of the coating liquid, it is inevitable to bring fine fibers of the substrate and damaged pieces of the substrate into the coating liquid, which affects the quality of the coating liquid; the continuous reflux of the coating liquid makes it The gradual increase of viscosity and solid content not only results in poor fluidity of the coating solution, affects the stability of the continuous production of the sheet, but also directly affects the appearance and sensory quality of the sheet. In addition, after a period of continuous production, the coating liquid must be manually cleared and filtered with a centrifuge and other equipment.

Utility model content

Aiming at the above-mentioned deficiencies in the prior art, the technical problem to be solved by the utility model is to provide a tobacco sheet coating liquid filtration system, which continuously filters during the production process, removes fine fibers in the coating liquid, and stabilizes the coating liquid. Viscosity and solid content ensure the intrinsic quality of the coating solution and enable continuous production.

The technical scheme of the utility model is: the tobacco sheet coating liquid filtration system comprises a coating liquid tank, a liquid storage tank, a coating roller and a backflow tank. A filter and a transition tank are set between the liquid storage tank and the coating roller. One end of the feed pipe is set at the lower part of the liquid storage tank, and the other end is connected to the upper end of the filter through a pump. The feed pipe goes directly to the transition tank, and the feed pipe at the lower end of the filter tank leads to the coating roller. The mesh number of the filter is 80-150 mesh, the working pressure is 0.4-0.6Mpa, the flow rate is 2-3m ³ /min, and the temperature is 30-60°C. A feeding branch pipe connected with the transition tank is arranged in the feeding pipe connected with the filter.

The utility model has reasonable design, simple structure and easy operation, and has the following advantages:

1. The coating liquid filtration system adopts automatic online continuous production, with minimal manual operation, and is suitable for industrial production;

2. The filter is used for precision filtration, which can effectively intercept impurities in the coating liquid, stabilize the solid content and viscosity of the obtained filtrate, and maintain and improve the quality of the concentrate;

3. Always maintain a constant flow rate, use the rotating scraper to automatically remove impurities, maintain the filter function of the filter, and automatically remove the filter residue, the filtering process is easy to control;

4. This technical solution provides continuous and stable production conditions for the subsequent coating process and helps to improve the quality of tobacco sheets.

Description of drawings

Accompanying drawing 1 is the structural representation of an embodiment of the utility model.

The marks in the accompanying drawings are described as follows: 1-coating liquid tank; 2-input pipe; 3-liquid storage tank; 4-pump; 5-feeding pipe; 6-overflow pipe; 7-filter; 8-transition Tank; 9-return pipe; 10-feed pipe; 11-coating roller; 12-return tank.

Detailed ways

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described in further detail. In the system of the present invention as shown in accompanying drawing 1, compared with prior art, increased filter 7, transition tank 8 and infusion tube 5 and corresponding valve etc. The coating liquid from the coating liquid tank 1 enters the liquid storage tank 2 and is stirred and mixed with the coating liquid from the backflow or overflow, and then pumped into the filter 7 by the pump 4 through the feeding pipe 5 to filter and trap fine particles. Impurities such as fibers, the filter 7 is provided with an automatic slag discharge time to automatically remove the filter residue; after filtering, the coating liquid after filtering and removing impurities flows to the transition tank 8 and is stored in the transition tank 8. The transition tank 8 is set in the utility model for The amount of the coating solution sent to the distribution roller 11 is stabilized to ensure the uniform and continuous process of the process; the coating solution is dip-coated on the paper-like substrate at the coating roller 11 according to the conventional process. The provided feeding branch pipe 13 is a spare pipeline used when the filter 7 is maintained.

The following table is a table of changes in the technical parameters of the coating liquid in the prior art:

Table 1, prior art coating fluid technical parameters

The applicant has carried out small batch experiment with the system of the utility model:

Get 5kg of concentrated solution after adding the mixed backflow coating solution; concentrated solution sampling detection: viscosity 196.7 (m.Pa) S, solid content 45%; concentrated solution is filtered to remove impurities with cleaning filter coating system of the present utility model, filter The mesh number is 100 mesh, and the obtained filtrate is sampled and tested: viscosity is 85.6 (m.Pa) S, solid content is 41.8%, and slag content is 20.52%. The filtered concentrate is coated on a paper substrate according to a conventional process. Tobacco flakes can be obtained after drying and cutting. Compared with the prior art, the appearance quality of this tobacco sheet is obviously improved and the miscellaneous gas is obviously reduced through the comparison of appearance and evaluation and smoking.

The applicant has also carried out industrialized production test with the system of the utility model:

The coating reflux liquid is returned to the coating liquid storage tank according to the normal production process, and stirred and mixed with a stirrer; the sampling and testing results of the mixed coating liquid are as follows:

Table 2. Technical parameters of concentrated solution before filtration in industrial test

Use a pump to pump the mixed coating solution to the automatic cleaning filter device to filter and remove impurities. The filter mesh is 60 mesh. The working conditions are: pressure 0.4-0.6MPa, flow rate 2m ³ /min, temperature 30-60°C. Sampling and detection of concentrated liquid after filtration:

Table 3. Technical parameters of the concentrated solution after filtration in the industrial test

The filtered coating solution is coated on a paper substrate according to a conventional process. Tobacco flakes can be obtained after drying and slicing.

Adopting the utility model for production, the production of the substrate is continuous and stable, the quality of the sheet is constant and excellent, and the manual workload is reduced. Compared with the flake products in the prior art, the appearance and quality of the flakes produced by the utility model are obviously improved, and the miscellaneous gas is obviously reduced.

After making cigarettes with this industrialized test sample, the results are as follows:

Table 4. Comparison of smoking evaluation results of tobacco sheets

In the comparison sample of evaluation and suction results, the quality of the flakes prepared by the method of the present invention is obviously improved, and the score is obviously higher than that of the samples of the prior art.

Claims (3)

1. A tobacco sheet coating liquid filtration system, comprising a coating liquid tank, a liquid storage tank, a coating roller, and a reflux tank, characterized in that: it is arranged between the liquid storage tank (3) and the coating roller (11) There is a filter (7) and a transition tank (8). One end of the feed pipe (5) is set at the lower part of the liquid storage tank (3), and the other end is connected to the upper end of the filter (7) through the pump (4). The feeding pipe (5) connected to the lower end of the device (7) directly reaches the transition tank (8), and the feeding pipe (10) at the lower end of the filter tank (8) leads to the coating roller (11). 2. The tobacco sheet coating liquid filtration system according to claim 1, characterized in that: the mesh number of the filter (7) is 80-150 mesh, the working pressure is 0.4-0.6Mpa, and the flow rate is 2-3m ³ /min, temperature 30 ~ 60 ℃. 3. The tobacco sheet coating liquid filtration system according to claim 1, characterized in that: a feeding pipe connected to the transition tank (8) is provided in the feeding pipe (5) connected to the filter (7). Branch pipe (13).

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