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Gasification slag fertilizer and composting method

A technology for gasification slag and composting, which is applied in the preparation of organic fertilizers, organic fertilizers, and excretion of fertilizers, etc., can solve the problems of ineffective utilization of gasification slag and N loss, and achieve the effect of promoting composting, reducing N loss and reducing Effects of Ammonia Emissions

Inactive Publication Date: 2021-12-24
CHINA ENERGY GRP NINGXIA COAL IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method of composting and a gasification slag fertilizer in order to overcome the difficult effective utilization of gasification slag in the prior art and the problem of N loss when composting agricultural waste. The method described above can reduce N loss during composting

Method used

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  • Gasification slag fertilizer and composting method

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0061] This preparation example is used to illustrate the preparation method of gasification slag

[0062] The black water comes from the crude synthesis gas from the gasifier, which is sprayed and washed with water by the Venturi scrubber and the scrubber, and then flashed to produce a process medium with a relatively high solid content (10%-15%).

[0063] The gasification slag in the black water is processed by removing floating beads using a device for removing floating beads. The device for removing floating beads includes a separation tank, a settling tank and a buffer tank. The separation tank includes a separation chamber and a stirring tank arranged in the separation chamber. The black water inlet, the dilution water inlet and the black water outlet communicated with the separation chamber, and the stirring member is set to stir the black water entering the separation chamber so that the black water adheres to the gasification slag and is wrapped in the gasification sla...

Embodiment

[0066] This example is used to illustrate the method of composting.

[0067] (1) Add crushed straw (0.5-1.5cm in particle size), chicken manure and the gasification slag prepared in Preparation Example 1 to the composting raw material, and mix them uniformly to obtain the composting raw material, wherein the amount of each component is such that The carbon-to-nitrogen ratio of compost raw materials is in the range of 38-44, the water content is in the range of 50-60%, and the consumption of gasification slag is respectively 0% by weight (that is, no gasification slag is added), 5% by weight, 15% by weight, 25% by weight, 50% by weight;

[0068] (2) Put the composting raw materials into the compost bin to pile up into strips with a height of 0.5 meters and a diameter of 1.0 meters to obtain a fermentation heap and leave it to ferment; wherein, the bottom of the compost bin is equipped with a stainless steel screen (screen aperture diameter 1-2mm), the fermentation heap is plac...

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Abstract

The invention relates to the field of waste recovery, and discloses a gasification slag fertilizer and a composting method, and the method comprises the following steps: mixing gasification slag, livestock manure and a cellulose raw material to obtain a composting raw material; and stacking and fermenting the compost raw materials to obtain compost. Based on the total weight of the compost raw materials, the content of the gasified slag is 55 wt% or less; and the gasified slag is gasified slag obtained after floating bead removal treatment, and the water content of the gasified slag is 20 wt% or below. By adopting the method for composting, the decomposition of organic matter is effectively promoted, the loss of nitrogen is reduced, the concentration of phosphorus and potassium is increased, and the retention of nutrients is enhanced, so that the gasification slag fertilizer with rich nutrition is formed.

Description

technical field [0001] The invention relates to the field of waste recycling, in particular to a composting method and a gasification slag fertilizer. Background technique [0002] my country is rich in coal resources, and its coal output ranks first in the world. In the process of coal chemical industry, raw coal and fuel coal are burned in gasifier and boiler respectively to produce a large amount of slag, which is the main source of solid waste in large coal chemical projects. China is the world's largest coal gasification market. The amount of coal used in gasification furnaces has reached 250 million tons, resulting in the production of a large amount of gasification slag, with an annual production of more than 33 million tons of gasification slag. At present, the main uses of coal gasification slag are structural backfilling, roadbed filling, construction materials, extraction of hollow microbeads, preparation of molecular sieves, and extraction of rare metals, etc. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G1/00C05F17/00
CPCC05D9/00C05F3/00C05F11/00C05F17/00C05F7/00Y02W30/40
Inventor 王儒洋金政伟江尧范佳明齐志丽苏万里刘春萌
Owner CHINA ENERGY GRP NINGXIA COAL IND CO LTD
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