Grain continuous drying machine and grain continuous drying method

Abstract

The invention discloses a grain continuous drying machine and a grain continuous drying method. The grain drying machine shapes like a cuboid and is mainly composed of a preheating layer, air inlet layers, air exhaust layers, a material distributor and material discharge hoppers, a discharge device, air blowers, heat exchangers, water content instruments, etc. The drying machine is arranged from top to bottom as the follows: the vibration material distributor, the preheating layer, the air inlet layers, the air exhaust layers, drying layers, the air exhaust layers, the material discharge hoppers, material discharge mouths and a rock block material discharge quantity control device. The continuous drying method includes the following processing processes: a. uniform material distribution processing process; b, concurrent-flow and countercurrent-flow combined drying process; c, online control of drying medium working condition parameters; d, temperature control of the drying machine exhaust; and e, water content online control during the drying process of grains. The beneficial effects of the grain continuous drying machine are as follows: the grain dryer can adapt to different varieties of grain drying, material discharge mouths have relative large sectional area, and the grains are dried evenly and slowly. Thus the drying system can improve the drying device output and at the same time can improve the drying quality of grains and reduce the non-uniform degree of water content, which is beneficial to the continuous drying of grains.

Description

technical field [0001] The invention belongs to the field of material drying technical equipment and drying methods, and specifically relates to grain drying technical equipment and methods, in particular to a continuous grain drying machine and a sustainable grain drying method. Background technique [0002] In recent years, the development of grain drying technology and equipment has been rapid, and more achievements have been achieved. So far, the grain drying methods used mainly include: continuous type, intermittent type, combined type according to the process flow; according to the heating method: indirect type, direct heating type; Oil, electricity, biomass energy, etc. In addition, there are solar energy, microwave, far infrared, etc. No matter what kind of drying method is used, in the grain drying process, there is a slow recovery process, and the slow recovery section is designed in the grain drying equipment. The so-called slow recovery is because during the dr...

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Problems solved by technology

[0008] The Chinese patent application number is CN201010192148 "a conveyor belt type grain dryer", a conveyor belt type grain dryer, which is used to solve the problems of large size, inconvenient movement and high investment cost of grain crop drying equipment

The mechanism is novel in design, simple and reasonable in structure, reliable in operation, less in failure, but not easy to control

[0011] The Chinese patent application number is CN200920098924 "grain dryer grain discharge mechanism", on the lower side of the dryer silo, on the upper part of the two inner support grain deflectors that are oppositely arranged, equipped with a triangular cross-section. Grain distribution plate, on the upper side of the grain discharge hopper composed of the outer grain deflector and the inner grain deflector, an angular auxiliary grain distribution plate with a triangular cross-section is set, and the angular main grain distribution plate and the corner The included angle between one side of the shaped auxiliary grain distribution plate and the installation vertical line is 30-45°; this mechanism effectively eliminates the phenomenon of uneven discharge speed of grain in the silo of the dryer and in the grain discharge hopper, It realizes uniform discharge and discharge, but the measurement accuracy is poor and it is difficult to control

But this mechanism is not convenient for online operation and adjustment, and the measurement accuracy is closely related to the use time

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