RU2386370C1 - Ln burkov's drying method - Google Patents

Abstract

FIELD: food industry.

SUBSTANCE: according to the method suggested, several drying stages in the form of flat inclined conic sieves oscillating or rotating with constant speed are mounted successively one after another in the moving heat-carrier flow and drying agent is directed through them in the form of a flow with constant or variable velocity and density. Heat carrier temperature is raised from stage to stage at an equal value. Holes of all the sieves are round and they are positioned in parallel rows with equal pitch equal to 2-3 lengths of the biggest fraction of the drying mixture and shifted one relative to another at half the pitch.

EFFECT: such method enables to improve quality of drying grain or seeds.

Description

The invention relates to the field of drying mixtures and can be used to improve methods of drying granular mixtures, for example grains.

The author is not aware of such methods, but those that are known have those significant drawbacks in that the drying turns out to be of poor quality, uneven heating of the mixture to be dried.

The objective of the invention is to eliminate this drawback and increase the uniformity of drying due to the fact that the drying method consists in the fact that several stages of drying in the form of plane inclined oscillating or rotating constant speed of conical sieves through which the drying object is directed in the form of a stream with a constant or variable speed, as well as a constant or variable density and with the possibility of regulation the speed and density of the drying object and coolant, and the temperature of the coolant is increased from step to step by the same amount, starting from the minimum at the first drying stage to the maximum permissible at the last, which is set individually for each mixture (culture) and monitored using sensors, which are installed one at a time in the first stages of drying, in the next to last - two, in the last - four with equal steps and uniformly in volume of the stage of drying, and the last three stages of drying automatic samplers are poured, one for each step, which are equipped with an electric drive and an automatic control system that is programmed in the on-board computer, while the openings of all sieves are oval and place them on the sieves in parallel rows with the same pitch equal to 2-3 lengths of the largest fraction to be dried mixtures, and the holes of each subsequent row are shifted relative to the previous one by half a step between the rows, which is equal to 3-4 lengths of the hole, while the length of the hole is 2-3 times pain e greatest length of the longest component of the mixture to be dried.

New significant features of the method:

- in a moving coolant flow in the form of heated air, several drying stages are set sequentially one after another in the form of flat conical sieves oscillating or rotating at a constant speed,

- through the specified sieves direct the drying object in the form of a stream with a constant or variable speed, as well as a constant or variable density and with the possibility of controlling the speed and density of the drying object and coolant,

- the temperature of the coolant increases from step to step by the same amount, starting from the minimum in the first stage of drying to the maximum permissible in the last, which is set for each mixture (culture) individually,

- control the temperature with the help of sensors, which are installed one at a time in the first stages of drying, in the next to last - two, in the last - four with equal steps and evenly throughout the volume of the drying stage,

- at the last three stages of drying, automatic samplers are installed, one for each stage, which is equipped with an electric drive and an automatic control system,

- the operation of the automatic control system of the samplers is programmed in the on-board computer,

- holes of all sieves are oval and place them on sieves in parallel rows with the same pitch equal to 2-3 lengths of the largest fraction of the mixture to be dried,

- the holes of each subsequent row are shifted relative to the previous one by half a step between the rows, which is equal to 3-4 lengths of the hole, the length of which is 2-3 times longer than the longest component of the mixture to be dried.

The above new essential features, together with the known ones, are necessary and sufficient to achieve a technical result in all cases to which the requested amount of legal protection applies.

The technical result is obtained due to the fact that:

- in a moving coolant flow in the form of heated air several stages of drying are successively set one after another in the form of flat oblique conical sieves oscillating or rotating at a constant speed, through which the drying object is directed in the form of a flow with a constant or variable speed, as well as a constant or variable density and with the ability to control the speed and density of the drying object and coolant, which allows depending on the conditions to change the drying parameters, thereby increasing uniformity l drying, while the sequential passage of the dried stream of the mixture through the stages of drying and leads to equalization of the possible differences in the uneven flow,

- increasing the temperature from step to step by the same amount allows you to align the drying process,

- temperature control using sensors allows you to monitor the drying process and take appropriate measures,

- the installation of automatic samplers with a control system, the operation of which is programmed in the on-board computer, allows you to optimize the drying mode and to find out in a timely manner how drying is performed,

- the location of the openings on the sieves in the proposed manner, their sizes and steps allow you to distribute the dried mixture more evenly over the area of the sieve and evenly distribute the coolant supply.

An example implementation of the method. If we need to dry a granular mixture, for example, a batch of grain from under a combine, it is fed into the flow of a moving heat carrier in the form of heated air, and it passes several stages of drying in the form of inclined conical sieves oscillating or rotating at a constant speed through which passes the dried material flow with a constant or variable speed, and the ability to control the speed and density of the drying object will increase the productivity of the method. As the drying steps pass, the coolant temperature increases by the same amount, starting from the minimum at the first drying step to the maximum permissible at the last, which is set individually for each mixture (culture) and monitored using sensors that are installed one at a time in the first steps, penultimate - two, on the last - four with equal pitch and evenly throughout the drying step. At the last three stages of drying, automatic samplers are installed, one for each stage, which is equipped with an electric drive and an automatic control system, which is programmed in the on-board computer. The holes in the sieves are oval and placed on the sieves in parallel rows with the same pitch equal to 2-3 lengths of the largest fraction of the mixture to be dried, and the holes of each subsequent row are shifted relative to the previous one by half the step between the rows, which is 3-4 hole lengths, while holes are 2-3 times greater than the longest length of the longest component of the mixture to be dried.

Claims (1)

The method of drying grain or seeds, which consists in the fact that several drying stages are successively set in the form of heated oblique conical sieves oscillating or rotating at a constant speed in a moving coolant flow in the form of heated air, through which the drying object is directed in the form of a flow with a constant or variable speed, as well as constant or variable density and with the ability to control the speed and density of the drying object and coolant, and increase the temperature of the coolant from step to step by the same amount, starting from the minimum in the first stage of drying to the maximum permissible in the last, which is set individually for each mixture and is controlled by sensors that install one at a time in the first stages of drying, two in the next to last, the last - four with equal steps and evenly throughout the volume of the drying stage, moreover, in the last three drying stages, automatic samplers are installed, one for each stage, which are equipped with an electric drive and a automatic control, which is programmed in the on-board computer, while the openings of all the sieves are oval in shape and place them on the sieves in parallel rows with the same pitch equal to 2-3 lengths of the largest fraction of the mixture to be dried, and the holes of each subsequent row are shifted halfway between the previous one and half in rows, which is equal to 3-4 lengths of the hole, while the length of the hole is 2-3 times greater than the largest length of the longest component of the mixture to be dried.