RU2431095C2 - Installation for rotted straw drying - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: known installation for rotted straw drying consists of sectional drying chamber, transporter for transfer of layer, of screen positioned over transporter and of system of air ducts for transportation of heat carrier. The screen is made in form of complex of heat insulated sheets bent into a side of a rotted straw layer. Sheets facilitate access to the drying chamber; while air ducts are positioned on both sides of the chamber along its length and have slits for supply of heat carrier into a drying zone. The transporter of the installation is located in each section, while the sections proper are interconnected by connection of air ducts, transporters proper and their bases. Also, branches of the transporter transferring a layer of rotted straw perform forced cross vibrations.

EFFECT: low expenditures for implementation of invention.

3 cl, 2 dwg

Description

The invention relates to the field of drying, and in particular to devices for drying stem bast-fiber materials, for example, linen flange trusts.

Currently, the flax fiber production technology used in domestic flax plants requires drying of the stems of the flax folatea trust before mechanical processing. The applied drying methods and equipment for their implementation were created in conditions of low cost of energy resources and sufficient financial support from the state in terms of covering depreciation deductions for equipment. In market conditions, the use of existing equipment has become economically unprofitable, which has led to the refusal of a number of enterprises to dry trusts. The consequence of this was a decrease in the yield of long fiber and a deterioration in its quality. Therefore, at the present time, the use of more economical drying plants with less metal consumption is required.

Known tumble dryers for drying flaxcrests, consisting of a heat insulating chamber, a conveyor, a system of fans and heaters [1]. However, their application requires significant areas and energy resources, which reduces the efficiency of enterprises engaged in processing flax.

Also known is a drying apparatus for flax drying, containing a sectional drying chamber, a conveyor for moving the layer with a screen installed above it, and a duct system for moving the coolant [2].

However, its use does not allow to obtain the required quality of drying, since when using a non-uniform along the length of the flaxcrest, the coolant will not be rationally used, and drying of various sections of the stems along their length will not provide effective subsequent isolation from the stems of the fiber.

The mentioned installation for drying flax trusts in its technical essence and the achieved effect is the closest to the claimed one and therefore it can be chosen as a prototype.

An object of the invention is to increase the drying efficiency and reduce energy costs for its implementation due to a more rational use of the coolant based on the properties of the processed linen trusts.

The solution of this technical problem is achieved by the fact that in the installation for drying flax trusts containing a sectional drying chamber, a conveyor for moving the layer with a screen installed above it and a duct system for moving the coolant, according to the invention, the screen is made in the form of a set of flax flakes bent towards the layer towards the layer thermally insulated sheets with the ability to provide access to the drying chamber, and air ducts are located on both sides of the chamber along its length and have slots for supplying heat ositelya the drying zone. In addition, the conveyor of the drying unit for flax drying is located in each of the sections, and the sections themselves have the ability to dock with each other by connecting the ducts, the conveyors themselves and their bases. In addition to this, the conveyor branches moving the layer of flax trusts have the ability to make forced transverse vibrations.

The presence of a screen made in the form of a set of thermally insulated sheets bent by bending toward the layer of flax trusts that have access to the drying chamber makes it possible to change the cross section of the drying chamber when passing the coolant in the middle of the stalks of flax trusts along their length, which will increase the speed of the coolant moving in this area and intensify the drying of the middle part of the stems of flax. This, in turn, will lead to a better de-sharpening of the stems in this area when they are machined by beating. In addition, the presence of a deflection in the direction of the layer of linen flakes of thermally insulated sheets will improve the adhesion conditions of the material with the conveyor for its movement. The presence of insulated sheets that can provide access to the drying chamber will reduce heat loss, as well as improve the service conditions of the installation for drying flax, in particular when moving sheets by lifting them. In this case, maintenance personnel can carry out repair and maintenance work in the drying chamber.

The presence of air ducts located on both sides of the chamber along its length and having slots for supplying the coolant to the drying zone will simplify the design of the installation for drying flax and increase the efficiency of moving the coolant when it is fed into and out of the drying zone. Moreover, this arrangement will also lead to a decrease in heat loss during drying.

The location of the conveyor in the proposed installation for drying flax Trust in each of the sections, which have the ability to dock with each other by connecting the ducts, the conveyors themselves and their bases, will ensure the modularity of the installation for drying flax Trust. If necessary, one or more sections can be used depending on the type of raw material to be dried, its properties and productivity of machines for subsequent machining. If there are several sections, they are easily connected to each other by connecting the ducts, the conveyors themselves and their bases.

Providing for the conveyor branch moving the flax layer to make forced lateral vibrations will intensify the drying process and reduce energy costs for its implementation.

The invention is illustrated by drawings.

Figure 1 shows (top view) an exemplary flow chart of the proposed installation for drying flax drying drying method; figure 2 is a view aa in figure 1.

An example of a specific implementation.

The layer of stems trusts 1, formed as a result of unwinding the roll, is fed to the conveyor 2 of the proposed drying installation. By means of a conveyor, a layer of stalks of flax seeds moves in the drying zone (chamber), namely along the supplying heat carrier 3 and its receiving 4 air ducts. In each of the ducts there are slots for moving the coolant into and out of the drying zone. The drying zone in each section is fenced from above with several thermally insulated sheets tightly joined together - screens 5. They have a deflection in the direction of the layer of flax trusts. The presence of deflection provides the intensification of drying of the middle sections of the stems and the necessary conditions for movement with a slatted or peg (or other design) conveyor inside the drying chamber. Sheets-screens can be raised (reclined) pos.5a, thereby providing access for maintenance of the drying chamber.

When moving the layer of stalks of flax trusts using a conveyor, its leading section performs forced oscillatory movements, for example, in the vertical direction due to contact with the protrusions of the base of the conveyor. As a result, the stems in the layer undergo reciprocating movements relative to each other, which intensifies the process of moisture removal. For this reason, the drying speed increases.

The drying plant consists of several sections I, II, III, the amount of which is determined by the conditions of the subsequent mechanical processing of the stems. At the same time, the sections have the ability to dock with each other by connecting ducts, conveyors and their bases.

Using the proposed method does not require large expenses for its implementation, in comparison with the currently existing in practice methods and devices for drying linen trusts.

Information sources

1. Directory of factory primary processing of flax. / Under the total. ed. V.N.Khramtsova. - M .: Light and food industry, 1984. - 512 p.

2. USSR author's certificate No. 1523866, authors: E. N. Tokmakov, A. A. Potarin, A. N. Pigalov. Publ. 11/23/89, bull. No. 43.

Claims (3)

1. Installation for drying flax trusts containing a sectional drying chamber, a conveyor for moving the layer with a screen installed above it and a duct system for moving the coolant, characterized in that the screen is made in the form of a set of thermally insulated sheets curved by bending towards the layer of flax trust, which can provide access to the drying chamber, and air ducts are located on both sides of the chamber, along its length and have slots for supplying coolant to the drying zone. 2. Installation for drying flax trusts according to claim 1, characterized in that the conveyor is located in each of the sections, and the sections themselves have the ability to dock with each other by connecting the ducts, the conveyors themselves and their bases. 3. Installation for drying flax trusts according to claim 1, characterized in that the conveyor branches moving the layer of flax trusts are able to perform forced transverse vibrations.

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