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Straw inorganic acid dissolving treatment method

A technology of inorganic acid and straw, applied in the direction of solid waste removal, etc., can solve the problems of high processing cost and complicated operation steps, and achieve the effect of waste utilization

Inactive Publication Date: 2018-10-12
HEFEI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has complicated steps and high processing cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for treating straw with inorganic acid solution, comprising the steps of:

[0025] A, crushing, cleaning and drying the straw to obtain a straw section with a length of 1 to 3 cm;

[0026] B. According to the proportion of immersing 10mL of concentrated nitric acid per gram of wheat straw section, immerse the pretreated straw section in acid solution and stir evenly, soak for 12-36h;

[0027] C. Neutralize the soaking solution with lye to neutralize the pH, and obtain the filtrate and a small amount of carbon-containing residue after filtering.

Embodiment 2

[0029] A method for treating straw with inorganic acid solution, comprising the steps of:

[0030] A, crushing, cleaning and drying the straw to obtain a straw section with a length of 1 to 3 cm;

[0031] B. According to the ratio of immersing 15 mL of concentrated nitric acid per gram of rice straw section, immerse the pretreated straw section in the acid solution and stir evenly, and soak for 24 hours;

[0032] C. The soaking solution is neutralized with sodium hydroxide solution to neutralize the pH, and the filtrate and a small amount of carbon-containing residue are obtained after filtering.

Embodiment 3

[0034] A method for treating straw with inorganic acid solution, comprising the steps of:

[0035] A, crushing, cleaning and drying the straw to obtain a straw section with a length of 1 to 3 cm;

[0036] B. Immerse in 15mL 12M H for every gram of rice straw 2 SO 4 The ratio of the pretreated stalks is immersed in the acid solution, stirred evenly, and soaked for 24 hours;

[0037] C. The soaking solution is neutralized with sodium hydroxide solution to neutralize the pH, and the filtrate and a small amount of carbon-containing residue are obtained after filtering.

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Abstract

The invention belongs to the technical field of agrochemical treatment and relates to straw acid dissolving treatment, in particular to a straw inorganic acid dissolving treatment method. The method provided by the invention comprises the steps that straw is pulverized into segments, common inorganic strong acids such as hydrochloric acid, nitric acid and sulfuric acid serve as solvent precipitants, with the purpose of exploring influences of various concentration gradients of monomer acids on the dissolution rate by means of a control variate method, the optimal acid solution and the opticalconcentration of the solution are found out, and then, influences of mixing of two acid solutions with the optimal concentrations and mixing of three acid solutions with the optimal concentrations onthe dissolution rate are explored; and 24 hours later after dissolving, a sodium hydroxide solution is added for performing neutralizing, then filtration operation is performed, and filtrate or blackpowder carbon materials are retained. The common strong acid solutions provided by the invention are low in cost and easy to obtain, the solutions after dissolution are neutralized through alkali, andthe obtained neutral filtrate does not pollute the environment and can be further concentrated to obtain solid waste residue which is convenient to treat; and in addition, the carbon materials obtained through carbonization can be applied to gas adsorption separation, and waste materials are fully utilized.

Description

technical field [0001] The invention belongs to the technical field of agricultural chemical treatment, and relates to an acid-dissolving method for treating straw, in particular to a method for inorganic acid-dissolving treatment of straw. Background technique [0002] At present, most of the treatment of straw is incineration and landfill, which also includes crushing straw and returning it to the field, using it as feed, returning it to the field, biomass power generation, biogas production, and papermaking. Straw burning directly will cause environmental pollution, affect air quality, and even aviation safety; simple processing of straw into boards, high feed costs, low added value of products, and unsatisfactory promotion. China is a large agricultural country, and there are many crop straws, and simple processing cannot solve the fundamental problem; it is necessary to study the deep processing of straw, increase the added value, and realize its comprehensive utilizati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00B09B5/00
CPCB09B3/00B09B5/00
Inventor 王方阔徐丽丽吴进张博程华毕建洪
Owner HEFEI NORMAL UNIV
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