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Boiler molded coal and preparation thereof

A boiler and pulverized coal technology, which is applied in the field of environment-friendly boiler briquettes and its preparation, can solve the problems of difficulty in making boiler briquettes with appropriate strength, low cold and hot strength, and low sulfur content, so as to increase the specific surface and oxygen Excellent diffusion ability, small exhaust heat loss, and low ignition temperature

Inactive Publication Date: 2009-01-21
天津环宇净能环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Datong pulverized coal has the characteristics of soft texture, high elasticity, and low hot and cold strength after forming, so it is difficult to make boiler briquettes with appropriate strength, and Datong briquetted coal generally has a low sulfur content, so it is generally not necessary to use the method disclosed in 97113356.5. Manufacture of boiler briquettes with high sulfur fixation rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The preparation of embodiment 1 binding agent

[0046] First, 50 parts of tap water are metered into the reaction kettle, and then 0.5 parts of the 40% caustic soda solution in the storage tank are pumped into the high-level metering tank with a pump, and metered into the reaction kettle with a steam heating jacket, and the reaction kettle is started to stir. After stirring for 5 minutes to make the mixture uniform, 8 parts of solid starch substances (starch factory leftovers) were added to the reactor by an electric hoist, and steam was introduced into the jacket of the reactor and heated to a temperature of 75° C. for 30 minutes to obtain Adhesive, which is pumped into the storage tank for use.

Embodiment 2

[0047] The preparation of embodiment 2 binding agent

[0048] First, 90 parts of tap water are metered into the reaction kettle, and then 3 parts of 40% caustic soda solution in the storage tank are pumped into the high-level metering tank with a pump, and metered into the reaction kettle with a steam heating jacket, and the reaction kettle is started to stir After stirring for 5 minutes to make the mixture uniform, 30 parts of solid starch (starch factory leftovers) were added to the reactor by an electric hoist, and steam was introduced into the jacket of the reactor and heated to a temperature of 80°C for 20 minutes. The binder is obtained, which is pumped into a storage tank for use.

Embodiment 3

[0049] The preparation of embodiment 3 binding agent

[0050] First, 70 parts of tap water are metered into the reaction kettle, and then 1.25 parts of 40% caustic soda solution in the storage tank are pumped into the high-level metering tank with a pump, and metered into the reaction kettle with a steam heating jacket, and the reaction kettle is started to stir. After stirring for 5 minutes to make the mixture uniform, 15 parts of solid starch substances (starch factory leftovers) were added to the reactor by an electric hoist, and steam was introduced into the jacket of the reactor and heated to a temperature of 70 ° C for 30 minutes to obtain Adhesive, which is pumped into the storage tank for use.

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Abstract

The invention discloses a boiler type coal and a method for preparing the same. The boiler type coal comprises the following compositions in portion by weight: 60 to 90 portions of Datong coal powder, 5 to 15 portions of caking agent (counted by dry matter), 1 to 20 portions of clinker, 1 to 10 portions of sulfur-fixing agent and 0.05 to 1.5 portion of combustion-supporting agent. The caking agent is formed by treating a starch material in inorganic dilute alkali solution at a temperature of between 50 and 85 DEG C. The preparation method comprises the following steps: the raw materials of the powdery coal, the caking agent, the clinker, the sulfur-fixing agent and the combustion-supporting agent are evenly mixed, molded and dried. The boiler type coal can be well molded, has good mechanical strength and waterproof performance and is suitable for a large-medium-scale boiler of over 20 tons / hour.

Description

technical field [0001] The invention relates to boiler molded coal, in particular to an environment-friendly boiler molded coal and a preparation method thereof. Background technique [0002] Coal is one of the main energy sources used in my country at this stage. However, at present, the coal directly used for combustion in my country accounts for more than 80% of the total coal consumption in the country, and more than half of it is supplied for direct combustion in the form of raw coal scattered combustion. This results in low coal utilization efficiency, serious pollutant emissions, and high-quality lump coal raw materials in short supply. [0003] From the perspective of coal production, with the continuous development of coal mining mechanization, the yield of pulverized coal has gradually increased. Therefore, due to the sharp decline in the production rate of lump coal, the situation that the supply of lump coal exceeds demand is becoming increasingly severe. At t...

Claims

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Application Information

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IPC IPC(8): C10L5/04C10L5/10
Inventor 葛苏宋永玮
Owner 天津环宇净能环保科技有限公司
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