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Environment-friendly sulfur-fixing briquette additive as well as preparation method and use method thereof

A technology for additives and briquette, applied in fuel additives, solid fuels, petroleum industry and other directions, can solve the problems of reducing the strength of briquette, affecting the popularization and use of sulfur-fixing briquette, etc. The effect of improving the sulfur fixation rate

Inactive Publication Date: 2020-07-14
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to resource and cost constraints, most sulfur-fixing agents are calcium-based substances, and the Ca / S ratio is greater than or equal to 2, resulting in a reduction in the strength of briquettes by as much as 50%, which greatly affects the popularization and use of sulfur-fixing briquettes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] In parts by weight, 60 parts of CaCO 3 Broken until the particle size is less than 0.1mm, react with 60 parts of 10% acetic acid for 1 hour, and at 100 o C drying; then with 20 parts of Ca(OH) with particle size less than 0.1mm 2 20 parts of coal gangue are evenly mixed to become additives. Using Ningxia low-sulfur coal as raw material (M ad 1.32%, A ad 22.91%, V ad 13.01%, S ad 0.8%), according to the Ca / S molar ratio = 1.5, add this additive, when adding 2% starch binder, the briquette strength is 415N / , 900 o C combustion sulfur fixation rate 82%; 1100 o C combustion sulfur fixation rate 65%.

Embodiment 2

[0014] In parts by weight, 60 parts of CaCO 3 Broken until the particle size is less than 0.1mm, react with 60 parts of 20% acetic acid for 1 hour, and at 100 o C drying; then with 20 parts of Ca(OH) with particle size less than 0.1mm 2 20 parts of coal gangue are evenly mixed to become additives. Using Ningxia low-sulfur coal as raw material (M ad 1.32%, A ad 22.91%, V ad 13.01%, S ad 0.8%), according to the Ca / S molar ratio = 2, add this sulfur-fixing additive, when adding 2% starch binder, the briquette strength is 510N / , 900 o C combustion sulfur fixation rate 86%; 1100 o C combustion sulfur fixation rate is 68%.

Embodiment 3

[0016] In parts by weight, 55 parts of CaCO 3 Broken until the particle size is less than 0.1mm, react with 55 parts of 20% acetic acid for 1 hour, and at 100 o Dry at C; then mix with 30 parts of Ca(OH) with particle size less than 0.1mm 2 15 parts of coal gangue are evenly mixed to become additives. Using Ningxia high-sulfur coal as raw material (M ad 1.00%, A ad 23.19%, V ad 17.03%, S ad 2.53%), according to the Ca / S molar ratio = 2, add this sulfur-fixing additive, when adding 2% starch binder, the briquette strength is 523N / , 900 o C combustion sulfur fixation rate 88%; 1100 o C combustion sulfur fixation rate 70%.

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Abstract

The invention discloses an environment-friendly sulfur-fixing coal briquette additive as well as a preparation method and a use method thereof, and belongs to the field of processing of sulfur-fixingcoal briquettes and additives for reducing coal combustion SO2 emission in ingredients. The sulfur-fixing coal briquette additive is prepared from the following raw materials in parts by weight: 50 to60 parts of CaCO3, 20 to 30 parts of Ca(OH)2, 15 to 25 parts of coal gangue, and organic acid in a weight ratio of CaCO3 to organic acid being 100:(10 to 30). According to the invention, the problemsof low strength and low sulfur fixation rate of the CaCO3 sulfur fixation briquette are solved; the additive and the method can be well applied to the field of production of industrial and civil sulfur-fixing coal briquettes.

Description

technical field [0001] The invention relates to an environment-friendly sulfur-fixing briquette additive, a preparation method and a use method thereof, and belongs to the field of sulfur-fixing briquette processing. Background technique [0002] my country is rich in coal and lacks oil and gas, and coal is the main energy source. For a long period of time, the pattern of using coal as the main source will not change. Most of the rural areas in northern my country are limited by factors such as remote location, scattered living, and underdeveloped economy. Centralized heating cannot be realized. They mainly use scattered coal for cooking and heating. This kind of civil scattered coal burns a large amount and a wide area, and the heating period in winter is highly concentrated, resulting in frequent occurrence of haze weather in the north, especially in the Beijing-Tianjin-Hebei region during the heating period, with respirable particulate matter (PM10) and fine particulate m...

Claims

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Application Information

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IPC IPC(8): C10L9/10C10L5/02C10L5/14C10L10/00
CPCC10L5/02C10L5/14C10L9/10C10L10/00
Inventor 黄戒介刘哲语程中虎王志青房倚天宋双双李勇博王鸿瑜
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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