A sandy soil conditioner and its continuous autoclaving device and method

Abstract

The invention belongs to the technical field of soil conditioning and restoring, particularly relates to a sandy soil conditioner, and further relates to a continuous steam-pressing device and method of the sandy soil conditioner. The sandy oil conditioner is prepared from, by weight, 8-15 parts of polyacrylamide, 4-10 parts of carboxymethylcellulose, 8-20 parts of furfural residues, 14-22 parts of turf, 12-25 parts of bentonite, 6-18 parts of palygorskite, 3-12 parts of boric magnesium powder, 12-25 parts of straw powder, 6-18 parts of marsh gas residues, 8-19 parts of humic acid and 0.3-1.5 parts of microelements. The sandy soil conditioner can effectively improve sandy soil and improve the micro-ecological environment of the soil and can also prevent and treat soil disease microorganisms. According to the sandy soil conditioner, a large scale can be achieved, waste water, waste gas and waste residues are avoided, the sandy soil conditioner is suitable for mass application and popularization, and great economic benefits can be generated.

Description

technical field [0001] The invention belongs to the technical field of soil conditioning and restoration, and in particular relates to a conditioner for sandy soil, and also relates to a continuous autoclaving device and method for the above-mentioned conditioner. Background technique [0002] Sandy soil refers to the soil with high sand content in the soil particle composition, and it is one of the basic categories of soil texture. According to the regulations of the international system, the sand content of sandy soil can reach 85-100%, while the fine soil particles only account for 0-15%. According to China's regulations, sand (particle size 1-0.05 mm) content greater than 50% is sandy soil. The ability of sandy soil to retain water and fertilizer is poor, the nutrient content is low, the soil temperature changes rapidly, the organic matter of sandy soil decomposes quickly, accumulates less, and nutrients are easily leached, resulting in a lack of various nutrients. Fer...

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Problems solved by technology

[0003] Therefore, some documents disclose that polyacrylamide is used as a water-retaining agent to improve soil structure, increase rainfall infiltration, reduce runoff, slow down soil water evaporation, increase nutrients, etc.; there are also natural organic materials such as peat and sapropel to improve wind-sandy soil quality. These methods have a certain improvement effect on sandy soil and improve the water and fertilizer retention capacity, but the soil improvement effect is poor in aftereffect and unstable. It is only effective for current season crops, and the effect cannot be sustained and stable. improved soil

[0004] 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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