Vertical fine crushing machine for straw

Abstract

The invention relates to a vertical fine crushing machine for straw, and belongs to the technical field of agricultural machinery. The vertical fine crushing machine includes a frame, a vertical barrel fixed on the frame, and a vertically-disposed crushing main shaft. The upper and lower ends of the barrel are separately sealed with an upper cover plate and a lower sieve plate. The side wall of the barrel is provided with a plurality of discharge holes which can be used for installing a screen mesh. The upper cover plate is provided with a feed inlet and a plurality of air-supplying holes forconnecting the inside and the outside of the barrel. The crushing main shaft is arranged in the barrel and the top end of the crushing main shaft protrudes out of the upper cover plate. An axial flowfan is fixed on the upper part of the crushing main shaft, and a plurality of fan blade type hammer bracket plates are arranged at the lower part of the crushing main shaft at intervals. The back of each fan-blade-type hammer bracket plate is fixedly provided with fan blades along the radial direction of the crushing main shaft. U-shaped fixed blades are fixed on the outer sidewall of the barrel,and the teeth of each U-shaped fixed blade extend into the inner sidewall of the barrel. The vertical fine crushing machine for straw can crush high-moisture short straw into straw fines of 20 mm or below to meet requirement of straw biogas fermentation process.

Description

technical field [0001] The invention relates to a straw fine grinder, which belongs to the technical field of agricultural machinery. Background technique [0002] Grain is harvested through the combine harvester. The crushing mechanism on the existing harvester can crush rice, wheat, corn and other crop stalks into short straws of about 200mm, and stack them in the field. Moisture is higher under weather conditions. [0003] Wet short straws can be used as raw materials for various straw utilization methods after picking and baling. However, the added value of straw utilization is low, and the subsequent processing of baled straw consumes a lot of energy and costs high, especially the cost of drying, micro-grinding and curing. Forming costs, and some also produce secondary pollution, such as: disorderly discharge of dust during crushing, ash melting and slagging during high-temperature combustion, tar gas emission during pyrolysis and gasification, etc., which greatly rest...

AI Technical Summary

Problems solved by technology

[0003] Wet short straws can be used as raw materials for various straw utilization methods after picking and baling. However, the added value of straw utilization is low, and the subsequent processing of baled straw consumes a lot of energy and costs high, especially the cost of drying, micro-grinding and curing. Molding costs, some also produce secondary pollution, such as: disorderly discharge of dust during crushing, ash melting and slagging during high-temperature combustion, tar gas emission during pyrolysis and gasification, etc., which greatly restrict the utilization of straw resources

[0004] There is no need to dry and pulverize the straw to make biogas from straw fermentation. The obtained biogas can be used as energy source, and the biogas slurry and biogas residue can be used as organic fertilizer. There is basically no secondary pollution, and the processing cost is relatively low; but the wet straw should be finely crushed to 20mm left and right to meet the needs of the fermentation process, otherwise it will reduce the efficiency of gas production and block the relevant equipment in the fermentation process

[0005] According to the applicant's understanding, the traditional sieveless grass cutting mill can only crush the straw to about 100mm, and the sieve hammer mill for processing feed has strict requirements on the moisture content of raw materials (generally no more than 15%), especially when crushing raw materials When the water content is high, the pulverized fine material will adhere, stay, and block on the screen of the pulverizer and other related parts, making the pulverization operation ineffective. Length distribution range

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