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Rice straw-clay composite soil conditioner and preparation method thereof

A soil conditioner and rice straw technology, which is applied in the field of resource utilization of agricultural and forestry waste and soil treatment, to achieve the effect of large processing capacity, isolation of air, and reduction of exhaust gas emissions

Inactive Publication Date: 2018-12-28
芜湖格丰环保科技研究院有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] Another object of the present invention is to provide a preparation method of rice straw-clay composite soil conditioner, which solves the problem of inert gas protection by using the box sealing process, and uses the added clay to adsorb and lock part of the straw cracking components to reduce the pollution of pollutants. emission

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A preparation method of rice straw-clay composite soil conditioner, comprising the following steps:

[0049] 1) Mixing: by weight, successively weigh 20kg of rice straw powder (30 mesh), 1kg of phosphoric acid (85%), 50kg of attapulgite (100-200 mesh), 30kg of diatomite (100-200 mesh ), 20kg of carboxymethyl cellulose, 100kg of deionized water are poured into a horizontal ribbon mixer and mixed to obtain wet mud;

[0050] 2) Mud training: Put the wet mud material obtained in step 1) into a mud refining machine for 1 hour of normal pressure mud refining, and then vacuum mud refining at 0.09MPa in a vacuum mud refining machine for 0.5 h;

[0051] 3) Forming: the mud material after mud refining is extruded in a horizontal screw extruder to make cylindrical particles with a diameter of 6mm;

[0052] 4) Cartoning and drying: the formed particles are put into an open sagger, and dried in an industrial oven at 105-125°C for 6 hours;

[0053] 5) Sealing box roasting: cover th...

Embodiment 2

[0058] A preparation method of rice straw-clay composite soil conditioner, comprising the following steps:

[0059] 1) Mixing: by weight, successively weigh 40kg of rice straw powder (100 mesh), 0.5kg of phosphoric acid (85%), 1kg of potassium dihydrogen phosphate, 20kg of attapulgite (100-200 mesh), 10kg of diatom Soil (100-200 mesh), 30kg of sepiolite (100-200 mesh), 10kg of hydroxypropyl cellulose, 10kg of methylcellulose, 100kg of deionized water, poured into a horizontal ribbon mixer Intermediate mixture, get wet mud;

[0060] 2) Mud training: Put the wet mud material obtained in step 1) into a mud refining machine for 1 hour of normal pressure mud refining, and then vacuum mud refining at 0.09MPa in a vacuum mud refining machine for 0.5 h;

[0061] 3) Forming: the mud material after mud refining is extruded in a horizontal screw extruder to make cylindrical particles with a diameter of 4mm;

[0062] 4) Cartoning and drying: the formed particles are put into an open sag...

Embodiment 3

[0068] A preparation method of rice straw-clay composite soil conditioner, comprising the following steps:

[0069]1) Mixing: by weight, successively weigh 30kg of rice straw powder (30 mesh), 0.5kg of potassium dihydrogen phosphate, 0.5kg of dipotassium hydrogen phosphate, 30kg of attapulgite (100-200 mesh), 20kg of sea Foam stone (100-200 mesh), 10kg bentonite (100-200 mesh), 10kg diatomaceous earth (100-200 mesh), 5kg carboxymethyl cellulose, 5kg methyl cellulose, 120kg deionized water, Pour into a horizontal ribbon mixer and mix to obtain wet mud;

[0070] 2) Mud training: Put the wet mud material obtained in step 1) into a mud refining machine for 1 hour of normal pressure mud refining, and then vacuum mud refining at 0.09MPa in a vacuum mud refining machine for 0.5 h;

[0071] 3) Forming: the mud material after mud refining is extruded in a horizontal screw extruder to make cylindrical particles with a diameter of 6mm;

[0072] 4) Cartoning and drying: the formed parti...

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Abstract

The invention provides a rice straw-clay composite soil conditioner and a preparation method thereof. The composite soil conditioner is prepared from the following raw materials: 20-70 parts of rice straw powder, 30-80 parts of natural porous clay, 5-25 parts of an adhesive, 1- 5 parts of a carbonization aid and 80-150 parts of deionized water by mixing, pugging, forming, sagger loading, drying at105-125 DEG C, sagger sealing and roasting at 350-650 DEG C to obtain the composite soil conditioner. Compared with the prior art, sagger sealing is adopted, roasting can be performed in a normal oxygen-containing roasting furnace, inert atmosphere protection is not needed, and a quite small amount of tail gas is discharged. The prepared soil conditioner overcomes the defects that specific gravity of traditional straw charcoal is easily lost along with water migration, stable efficiency of heavy metal is lower and the like, contains straw charcoal and porous clay components, and can obviouslyimprove soil air permeability, passivate active heavy metals in soil, regulate soil pH, increase soil ion exchange amount, supplement nutrients such as Si, Ca, Mg, P, K and the like after soil application.

Description

technical field [0001] The invention belongs to the field of resource utilization of agricultural and forestry waste and soil treatment, and in particular relates to a rice straw-clay composite soil conditioner and a preparation method thereof. Background technique [0002] The amount of straw produced by crops reached 900 million tons, and rice straw accounted for the highest proportion of straw produced by crops, reaching 200 million tons. The comprehensive utilization methods of straw mainly include returning to the field (the three main modes are returning to the field when it is decomposed, returning to the field by covering, and returning to the field directly by mechanical crushing), feed processing, straw gas, straw combustion for power generation, and civil manufactured products. Among them, about 200 million tons are used as livestock feed, 200 million tons are used as industrial papermaking or industrial raw materials, 180 million tons are used by farmers as livin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40
CPCC09K17/40
Inventor 章文贵范丽梅朱慧可郭进进龚梅玲奉向东
Owner 芜湖格丰环保科技研究院有限公司
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