Method of increasing the efficiency of drier, particularly a stream drier

A dryer and steam technology, applied in the direction of drying gas arrangement, tobacco drying, drying solid materials, etc., can solve problems such as adverse changes in working gas components, affecting material properties, explosion or combustion, etc.

Inactive Publication Date: 2008-12-17
INT TOBACCO MACHINERY POLAND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Oxygen contained in the air entering the dryer may cause explosion or combustion, it is also a reactant of chemical reactions affecting the properties of the material
The dosing-separating valve used so far due to its operating principle allows air (oxygen) to enter the dryer, resulting in an adverse change in the composition of the working gas
Its regeneration requires a lot of energy to remove the oxygen from all the working gas contained in the dryer

Method used

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  • Method of increasing the efficiency of drier, particularly a stream drier
  • Method of increasing the efficiency of drier, particularly a stream drier

Examples

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Embodiment Construction

[0012] As shown in FIG. 1 , shredded tobacco 6 is fed into a feeder 1 and then sent through a mixing zone 0 to a steam dryer 2 . After drying, the tobacco flows out through the tobacco separator 3 and feeder 1'. The working gas, in particular steam, is circulated to the steam superheater 5 by means of a circulation pump 4 . The working gas leaving the steam superheater 5 collects the material being dried from the mixing zone 0 . Working gas, in particular steam, mixed with the substance to be dried flows into the steam dryer 2 . The material to be dried leaves the system through the outlet 8 of the feeder 1'. Behind the circulation pump 4, considering the flow direction of the working fluid shown in the number 12, a release valve 10 with an outlet 9 is installed, and an inlet 11 for inputting fresh working gas without air is installed to reduce the pressure of the dryer. The air concentration in the working gas polluted by the internally circulated air. figure 2 A sectiona...

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Abstract

The invention relates to a method of increasing the efficiency of a drier, particularly a stream drier for loose and flammable materials, particularly cut tobacco, working with a gaseous drying agent under a working pressure from 5 kPa to 10 MPa, measured as an absolute pressure, preferably the drying agent being superheated steam. The idea of the invention is that a pressurized process gas, preferably waste steam, particularly coming from the interior of the drier, is passed through a dosing-separating valve, preferably a rotary vane feeder (1') mounted behind the stream drier (2), particularly through its movable section with the dried material being emptied therefrom, the steam being returned from a release valve (10) for reusing it in the process of diluting the air, the steam being regarded as a technology waste product.

Description

technical field [0001] The present invention relates to a method of increasing the efficiency of dryers, particularly steam dryers, which are used to dry bulk, flammable materials. The invention relates in particular to cut tobacco dryers which operate with a gas desiccant, in particular with superheated steam. Background technique [0002] Many types of dryers known in the prior art, especially steam dryers, work with gas desiccants, in which superheated steam is used as working gas at a temperature close to or even higher than the ignition temperature of the material being dried. In this case, it is necessary to vent the oxidizing gases, especially the oxygen that enters the dryer with the air. Oxygen contained in the air entering the dryer can cause explosion or combustion, and it is also a reactant of chemical reactions, affecting the properties of the material. The dosing-separating valves used hitherto, due to their operating principle, allow air (oxygen) to enter th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F26B3/06
CPCA24B3/04F26B17/101F26B21/04F26B2200/22
Inventor M·谢雷德津斯基
Owner INT TOBACCO MACHINERY POLAND
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