Rice drying equipment with high thermal utilization rate

Abstract

The invention discloses rice drying equipment with high thermal utilization rate. A drying cavity of a drying box is provided with a vertical cylindrical structure, a plurality of hot air blowing holes are formed in the side wall of the drying cavity; a feeding mechanism is positioned in the drying cavity and comprises an exhaust tube arranged vertically and a screen which is spirally arranged around an air inducing pipe; and a first driving mechanism drives the screen to vertically move in a reciprocating manner. The optimally designed rice drying equipment with high thermal utilization rateis optimal and reasonable in structural design; the spiral screen is driven to vibrate vertically, so that grains are fed from top to bottom; dry hot air is blown from the side wall through the hot air blowing holes, gas with water is taken away through the exhaust tube arranged in the middle after the grains are dried, and thus, the grains are dried in a feeding process; and the air blowing holescorrespond to air inlet holes, flow diverting of dry gas is realized, the drying effect is improved, and moreover, homogeneity of drying of the grains in a feeding process is ensured.

Description

technical field [0001] The invention relates to the technical field of rice processing, in particular to a rice drying and dedusting equipment. Background technique [0002] Effectively controlling the moisture content of stored grain is the basic requirement for long-term safe storage of grain. At present, the most widely used mechanized grain drying equipment is mainly the drying tower, which is the mainstream product of my country's grain drying equipment. The drying tower uses the upward blowing hot dry air flow and the continuously falling grain particles to go against each other to dry the grain particles. The structure of the existing drying tower and its operating principle lead to the unsatisfactory drying effect, mainly as follows: 1. The drying uniformity is poor; 2. The free falling drying method of grain particles will produce a considerable amount of broken particles. It greatly affects the quality of grain processing and brings certain difficulties to normal...

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Problems solved by technology

The structure of the existing drying tower and its operating principle lead to the unsatisfactory drying effect, mainly as follows: 1. The drying uniformity is poor; 2. The free falling drying method of grain particles will produce a considerable amount of broken particles. It greatly affects the quality of grain processing and brings certain difficulties to normal storage; 3. The drying efficiency of the drying tower is relatively limited. Due to the retrograde between the drying air flow and the grain particles, the relative speed is high, and it is necessary to achieve large-scale drying. The operation index requires a high-temperature drying environment of 140-230°C, the particles are severely burnt, and the burnt rate is generally between 6-15%, especially in large-scale grain mechanized planting and grain production areas, such as corn planting areas. The maturity of corn is uneven, and the drying operation of the existing drying tower equipment will make the burnt situation more serious; 4. The processing cost of the existing drying method is high, and the processing cost is about 90 yuan / ton, and the grain reserve processing funds high pressure

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