An alkaline soil conditioner and its continuous autoclaving device and method

Abstract

The invention belongs to the technical field of soil conditioning and repairing and particularly relates to alkaline soil conditioner and a continuous steam-pressing device and method thereof. The alkaline soil conditioner comprises, by weight, 15-30 parts of ardealite / desulfurized gypsum, 10-20 parts of citric acid residues, 3-10 parts of waste sulphur, 12-20 parts of superphosphate, 30-35 parts of furfural residues, 14-18 parts of magnesium sulfate, 6-10 parts of aluminum sulfate, 2-3 parts of sulfuric acid compounds and 15-30 parts of humic acid. According to the alkaline soil conditioner, surface soil alkaline substances can be neutralized, the Na+ and Cl-ion content of a soil plough layer can be reduced, the soil exchangeable calcium and magnesium content can be increased, and the soil structure can be improved. A compound microorganism microbial agent is adopted, alkalified soil can be effectively improved, the soil micro-ecological environment can be improved, and soil disease microorganisms can be killed. The alkaline soil conditioner can achieve the large-scale purpose, is free of the three-waste problem and suitable for being widely applied and popularized, and can generate great economic benefits.

Description

technical field [0001] The invention belongs to the technical field of soil conditioning and restoration, and in particular relates to an alkaline soil conditioner, and also relates to a continuous autoclaving device and method for the above-mentioned conditioner. Background technique [0002] Due to the extensive use of chemical fertilizers throughout the year, the soil in many greenhouses frequently appears "red frost" and "white alkali", which are symptoms of alkaline soil. Soil salinization is a phenomenon in which alkaline salts gradually accumulate on the soil surface and the saturation of exchangeable sodium ions gradually increases. After the soil has been alkalized for a long time, saline-alkali land will be formed. The saline-alkali land is not suitable for planting any crops. The main reason for the alkalization of the soil is the large amount of ammoniacal nitrogen fertilizer used, which leads to an increase in the pH value of the land. To eliminate soil alkaliz...

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Problems solved by technology

[0009] The above method is not effective after long-term use, and it is easy to cause soil compaction

[0010] In addition, the existing autoclaving device for processing soil conditioners generally includes a pressure cylinder and a cover at both ends of the pressure cylinder. When feeding is required, open the cover at one end, put the material into the pressure cylinder, and then autoclave and discharge. When the pressure is released, the pressure relief time is long and continuous production cannot be performed during the pressure relief process, resulting in low efficiency, especially for materials with a long reaction time, which seriously affects the normal operation of other processes and significantly reduces production efficiency, and the above-mentioned intermittent autoclaving device basically releases the pressure in the autoclaving device due to its intermittent pressure release and pressurization, the pressure loss is huge, the energy utilization efficiency is low, and the cost remains high

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