SU1483217A1 - Method and apparatus for grain drying - Google Patents

Abstract

The invention relates to a drying technique and can be used for drying grain crops for various purposes. The purpose of the invention is to intensify the process while reducing power consumption. For this, the grain to be dried with a moisture content of 20% is pre-heated in a thin layer at an inlet agent temperature of 110-115 ° C, and the spent agent with a temperature of 80-90 ° C is used for drying. The preheated grain is mixed with the "raw material", fed to the bin, and then dried and cooled. The method is carried out in a device comprising drying and cooling pits 1 and a preheating chamber 4 located between them. The grain enters the chamber 4 through the funnels 7 and is scattered on the boxes-dissectors 5 and the dividers 9. The working agent is fed into the chamber 4 through the boxes-dividers 5. The grain is heated in a thin layer, which allows optimizing the parameters of the working agent. 1 il.

Description

The invention relates to a drying technique and can be used for drying grain crops for various purposes.

The purpose of the invention is to intensify the process while reducing energy consumption.

The method of drying the grain is carried out as follows.

The grain to be dried is subjected to preliminary recirculation heating in a thin layer at the temperature of the working agent at the inlet of 110-P5 ° D. When the moisture content of the grain is 20%, the recirculating grain is mixed with raw and served to the mark. After that, a part of the grain is dried by a heat carrier with a temperature of 80-90 ° C, pre-heated and cooled, and the rest is again pre-heated, and the cycle is repeated.

The drawing shows the device, General view.

The device for drying the grain contains two parallel-arranged drying and cooling pits 1, having zones 2 and 3, respectively, drying and cooling, placed between them preheating chamber 4 with means for supplying the working agent in the form of boxes-dividers 5, heat and moisture exchange bunker 6 located above Drying and cooling w chtlmi 1 and chamber 4 Preliminary 4 00 00 ND

heating, means for distributing the grain flow in the form of conical funnels 7 with valves 8 installed between the heat exchange hopper 6 and the preheating chamber 4. In addition, the device has means for creating a thin layer of grain when it passes through the preheating chambers, including distributors 5, evenly distributed along the height of the preheating chamber 4, and dividers 9, located perpendicular to the axis of the distributors 5 and between them, the height of the chamber 4 p is preheating, noria 10, grain supply, recirculation noria 11, noria 12 unloadings, hoppers 13 dry cooling chambers 1, recirculation bunker 14, firebox (not shown), ve til 15 torr to dryness zone 2 and the fan 16, the cooling zone 3 and drying ohladitel- GOVERNMENTAL shafts 1.

The device works as follows

Raw grain Noria 10 supply L. grain with closed valves 8 is loaded into the hopper 6 of the heat and moisture exchange of the cooling-cooling shaft 1.

Then, the working agent is simultaneously supplied to the preheating chamber 4 by means of the fan 15 through the box-dividers 5 and the grain through the open valves 8. At the same time, the grain from the hopper 6 of the heat and moisture exchange enters the funnels 7 and dissipates on the boxes-dissectors 5 and x 9, passes the preheating chamber 4, with a thin layer, lowering with a working agent, having a temperature of 110-115 ° C at the entrance to the chamber 4. The spent heat carrier with a temperature of 80-90 is sent to zone 2 to dry out the drying and cooling shafts 1. Until the grain reaches the specified humidity, the device operates in a closed cycle, tce. the grain from the hoppers 13 and the recirculation bunker 14 enters the recirculation nebula 11 and then into the hopper 6 of the heat and moisture exchange. At the same time, noria 10 and 12 do not work. Upon reaching a predetermined humidity, the fan 16 of the cooling zone 3 of the drying and cooling chambers 1 is turned on. Dried and cooled grain norium 12 unloading is sent for storage,

at the same time, the noria 10 into the bunker 6 serves the same amount of raw grain, and the operation cycle of the e-dryer becomes continuous.

The use of a working agent with a temperature below 110 ° C dramatically reduces the efficiency of the process. The working agent is emitted into the atmosphere having a low moisture content. Using a working agent with a temperature above H5 ° C leads to overheating of the grain mass, reducing the quality of the finished product.

Claims (2)

1. A method of drying the grain, including recirculating preheating of the grain, mixing the recirculating grain with the raw grain, spraying the resulting grain mass in each recirculation cycle, drying the grain and cooling, characterized in that, in order to intensify the process while reducing energy consumption, The grain is preheated in a thin layer at the temperature of the working agent at the inlet of 110-115 ° C, and the grain is dried out by the heat carrier with a temperature of 80-90 ° C during preheating. 2. A grain drying device containing two parallel-arranged drying and cooling shafts, a preheating chamber placed between them with means for supplying a working agent, a heat and moisture exchange bunker located above the drying and cooling shafts and a preheating chamber, means for distributing the grain flow in the form of a cone-shaped installed between the heat and moisture exchange bunker and the preheating chamber, means for creating a thin layer of grain when the chamber passes through it pre-heating, recirculation buckets and hoppers, k firebox and fans, this is so because, in order to intensify grain preheating while reducing energy costs, the means of distributing the grain flow are two rows of conical funnels, provided with valves, the means for creating a thin layer of grain are formed by boxes of splitters distributed evenly along the height of the preheating chamber, and splitters arranged perpendicular to the axis of the boxes of dividers and lennymi therebetween adjustment preheating chamber, the duct-dividers serve as means for supplying the working agent in the preheating chamber. .0 77 hgt Yu 1G / 2 DH sg) -  g - /