An acidic soil conditioner and its continuous autoclaving device and method

Abstract

The invention belongs to the technical field of soil improvement and repairing, and particularly relates to an acid soil improver, and also relates to a continuous steam-pressure device and method of the improver. The acid soil improver comprises the following components in part by weight: 42 to 50 parts of potassium feldspar, 6 to 15 parts of sodium silicate, 10 to 20 parts of calcium magnesium phosphorus fertilizer, 18 to 28 parts of lime, 20 to 30 parts of plant ash / coal ash, 15 to 25 parts of humic acid, 3 to 10 parts of magnesium oxide, 1 to 7 parts of activated auxiliary material and 0. 5 to 2 parts of trace elements. The acid soil improver can neutralize and immobilize acidity generating ions such as H+, Al<3+>, Fe<3+> and the like in surface soil and can improve the soil structure; moreover, by adopting the composite microbial agent, not only can the acidified soil be effectively improved and the micro-ecological environment of the soil be improved, but also disease microorganisms of the soil can be eliminated. The acid soil improver can be produced in a large scale, and the three-waste (waste water, waste solid and waste gas) problem can be avoided. The acid soil improver is suitable for being widely popularized to use, and vast economic benefit can be produced.

Description

technical field [0001] The invention belongs to the technical field of soil conditioning and restoration, and in particular relates to an acidic soil conditioner, and also relates to a continuous autoclaving device and method for the above-mentioned conditioner. Background technique [0002] Due to the influence of soil parent material, planting mode, fertilization, climate and other factors, there are currently about 2 [0003] million hectares of acidic soil. Most acidic soils have a pH of less than 5.5, and some are even lower. The total soil area of ​​Shandong Province [0004] 12.11 million hectares, and 1.7062 million hectares of acid brown soil, especially in Jiaodong, Shandong, where the pH value of some orchard soils even reached 4.5, seriously affecting the growth of fruit trees. In protected vegetable production, due to years of continuous cropping and excessive application of chemical fertilizers, soil acidification has become increasingly serious, which has b...

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Problems solved by technology

[0008] 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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