Phosphogypsum modified biochar method and application

A technology of phosphogypsum and biochar, applied in chemical instruments and methods, alkali metal compounds, and other chemical processes, can solve the problems of cumbersome reaction process, high cost, and complicated modification technology, and achieve wide source of raw materials, adsorption The effect of improved performance and low cost

Active Publication Date: 2018-12-04
INST OF GEOCHEM CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a phosphogypsum modified biochar and its application. This technical method has the advantages of simple operation, easy access to raw materials, low manufacturing cost, and convenient industrial production. Comprehensive utilization of waste-phosphogypsum and water eutrophication in the process of sewage treatment, as well as problems such as complex process, cumbersome reaction process and high cost of the existing modification technology

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  • Phosphogypsum modified biochar method and application
  • Phosphogypsum modified biochar method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0025] A preparation method of phosphogypsum modified biochar includes the following steps:

[0026] (1) Dry the distiller’s grains at 105°C to remove water, then grind and sieve for later use;

[0027] (2) The phosphogypsum recovered from the phosphogypsum storage yard is dried at 105°C for use;

[0028] (3) Take the phosphogypsum and distiller's grains in a weight ratio of 1:10 and mix them evenly, add water according to the W:V solid-liquid ratio of 2:3 to fully mix the two, and dry them at 105°C to obtain modified distiller's grains (namely modified Biomass) spare;

[0029] (4) Pyrolyzing modified distiller's grains under anaerobic or anoxic conditions to produce biochar, which is called phosphogypsum modified biochar.

[0030] (5) Grinding and sieving the prepared modified biochar, wherein the aperture of the sieve is 149-850 μm.

Embodiment 2

[0032] A preparation method of phosphogypsum modified biochar includes the following steps:

[0033] (1) Dry the dregs of traditional Chinese medicine at 100°C to remove water, then grind and sieve for later use;

[0034] (2) The phosphogypsum recovered from the phosphogypsum yard is dried at 100°C for use;

[0035] (3) Take the phosphogypsum and the traditional Chinese medicine slag in a weight ratio of 3:10 and mix them evenly, add water to the W:V solid-to-liquid ratio of 2:3 to fully mix the two, and dry them at 100°C to obtain the modified traditional Chinese medicine slag (ie Modified biomass) spare;

[0036] (4) Pyrolyzing modified traditional Chinese medicine residue under anaerobic or anoxic conditions to produce biochar, which is called phosphogypsum modified biochar.

[0037] (5) Grinding and sieving the prepared biochar, wherein the aperture of the sieve is 149-850 μm.

Embodiment 3

[0039] A preparation method of phosphogypsum modified biochar includes the following steps:

[0040] (1) Dry the straw at 120°C to remove the moisture, then grind and sieve for later use;

[0041] (2) The phosphogypsum recovered from the phosphogypsum storage yard is dried at 120°C for use;

[0042] (3) Take the phosphogypsum and straw according to the weight ratio of 1:2 and mix them evenly. According to the ratio of W:V to solid-liquid ratio of 2:3, add water and stir thoroughly to make the two fully mixed. Dry at 120°C to obtain modified straw (namely modified Biomass) spare;

[0043] (4) Pyrolyzing modified straw under anaerobic or anoxic conditions to produce biochar, which is called phosphogypsum modified biochar.

[0044] (5) Grinding and sieving the prepared biochar, wherein the aperture of the sieve is 149-850 μm.

[0045] In Examples 1 to 3 of the present invention, the modified biomass is pyrolyzed in a muffle furnace by nitrogen purging, where the nitrogen purging rate is 1 ...

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Abstract

The invention discloses phosphogypsum modified biochar and an application thereof. Preparation of the phosphogypsum modified biochar comprises the following steps: (1) drying biomass to remove water,grinding and sieving for standby application; (2) drying phosphogypsum mined back from a phosphogypsum stack for standby application; (3) taking phosphogypsum and the biomass powder in a proportion of(1-5):10 by weight, mixing evenly, adding water, fully stirring, fully mixing the phosphogypsum and the biomass powder evenly, and drying to obtain modified biomass for standby application; and (4) carrying out pyrolysis of the modified biomass under anaerobic or anoxic conditions to produce modified biochar, namely phosphogypsum modified biochar. The problems of comprehensive utilization of a large amount of solid waste-phosphogypsum and eutrophication of a water body in a sewage treatment process, as well as the problems of complex conventional modification technical craft, tedious reactionprocess, high cost and the like in China at present can be effectively solved,.

Description

Technical field [0001] The invention relates to a phosphogypsum modified biochar method and its application, and belongs to the technical field of solid waste treatment and resource utilization. Background technique [0002] The research and development of solid waste treatment technology has always been the focus of research in the field of environmental protection. Advantageous industries such as liquor brewing and phosphorus chemical industry in Guizhou Province have become important pillar industries that boost local economic development. While these advantageous industries promote local economic development, they also produce a series of solid wastes, which are of various types, complex components, and difficult to handle. These include distiller's grains produced by brewing companies and phosphorus slag and phosphogypsum produced by phosphorus chemical companies. Phosphorus chemical industry, as an industry with high energy consumption and heavy pollution, not only create...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F103/32
CPCB01J20/20B01J20/28085C02F1/281C02F2103/325
Inventor 王兵连国奇李心清吕文强
Owner INST OF GEOCHEM CHINESE ACADEMY OF SCI
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