Deep-purification impurity-removing treatment device of tobacco extraction liquid and impurity removing control method thereof

Abstract

The invention relates to a flocculation treatment procedure of tobacco sheet extraction liquid in a papermaking process. The traditional tobacco extraction liquid impurity-removing device has the defects of poor impurity removing effect and low efficiency. The procedure provided by the invention is characterized in that an extraction liquid inlet pump, a flocculating agent storage tank, a static mixer, a flocculation reaction tank and a horizontal spiral sedimentation centrifuge are utilized, wherein the flocculating agent storage tank is externally connected with a flocculating agent metering pump; the extraction liquid inlet pump and the flocculating- agent metering pump are respectively connected with the static mixer by virtue of pipelines; the static mixer is connected with the flocculation reaction tank by virtue of a pipeline; and the flocculation reaction tank is internally provided with a stirring device, and is connected with the horizontal spiral sedimentation centrifuge by virtue of a liquid discharging pump. The device provided by the invention can be applied in the flocculation treatment procedure of the tobacco sheet extraction liquid in the papermaking process, and has the advantages that the function is complete, the operation is reliable, the occupied area is small, the treatment is fast, and the quality of extraction liquid, concentrated liquid and a sheet product can be effectively improved.

Description

technical field [0001] The invention relates to a tobacco extract liquid flocculation treatment device and a control method for removing impurities thereof, which are mainly used in the flocculation treatment process of the tobacco sheet extraction liquid in the papermaking method. Background technique [0002] In the production process of paper-making tobacco sheet, it is a necessary process to realize the solid-liquid separation of tobacco extract (tobacco powder extract, tobacco stem extract or a mixture of both) and tobacco fiber. Mechanical devices such as squeezers, filter screens, vacuum filtration, and centrifugal sedimentation are usually used to separate tiny solid suspended solids in the stem end extract. These mechanical sedimentation equipment have the following disadvantages: 1. The squeezer can only be used for solid-liquid crude Usually, the slag content after treatment is more than 1%, and the liquid clarity is poor; 2. Use a very fine mesh cloth in the toba...

AI Technical Summary

Problems solved by technology

Mechanical devices such as squeezers, filter screens, vacuum filtration, and centrifugal sedimentation are usually used to separate tiny solid suspended solids in the stem end extract. These mechanical sedimentation equipment have the following disadvantages: 1. The squeezer can only be used for solid-liquid crude Usually, the slag content after treatment is more than 1%, and the liquid clarity is poor; 2. Use a very fine mesh cloth in the tobacco extract, such as 500-2000 mesh, which can effectively intercept fine particles, but the mesh cloth is too fine to be easily Particle clogging often requires manual intervention to wash and replace the mesh, which is difficult to achieve continuous industrial production; 3. The vacuum filter mesh is large and the separation is not complete, and the mesh is small and easy to block; 4. Centrifugal sedimentation requires The equivalent diameter requirement of the corresponding tiny suspended solids, such as the equivalent diameter required by the decanter centrifuge for solid phase particles ≥ 3μm

The protein, starch, pectin, cellulose, hemicellulose, lignin and other macromolecular components rich in conventionally separated tobacco extracts are present in large quantities in the extracts through the extraction and squeezing process, and after a long period of subsequent high-temperature concentration In the process, it is easy to gelatinize and coke these ingredients, which will affect the quality of the concentrate

Excessive slag content or macromolecular insolubles in the liquid phase will cause the deposition of slag in the concentration equipment, which will seriously affect the heat exchange efficiency and cause more heat source waste during concentration

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