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Briquette and preparation method thereof

A technology of briquette and pulverized coal, which is applied in the field of briquette and its preparation, can solve the problems that it is difficult to meet the mechanical strength of cold state and hot state at the same time, increase the gas production cost of the gas generator, thermal stability, and poor water resistance. Achieve high thermal strength, less ash content, and improve demolition strength

Active Publication Date: 2013-11-13
XINXING DUCTILE IRON PIPES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The fuel used in the gasifier is lump coal, and the purchased lump coal is partly broken during transportation and dumping, so the pulverized coal produced cannot be directly used in the gasifier, resulting in waste of energy and increasing the cost of the gasifier. Therefore, how to make reasonable and effective use of this part of pulverized coal resources has become the key to reducing the gas production cost of the gas generator
[0003] So far, there are many types of coal briquettes that have been developed, but no matter which one, it is difficult to meet the cold and hot mechanical strength, thermal stability, water resistance and other indicators at the same time, and it will also increase the ash content of the briquette, Reduce calorific value, produce secondary pollution, and have great limitations in use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A kind of briquette, which is composed of the following materials according to mass percentage: 85% pulverized coal, 8% modified water glass, 7% water-based epoxy resin, and the particle size of pulverized coal is less than 3mm;

[0025] Modified water glass is ethylene glycol diethyl ester modified water glass;

[0026] The water-based epoxy resin is bisphenol A type water-based epoxy resin.

[0027] The preparation method includes the following steps: (1) After mixing 85kg of pulverized coal, 8kg of modified water glass and 7kg of water-based epoxy resin in proportion with a twin-shaft mixer, add 7.5kg of water and mix evenly, and use a double-roller rolling machine Press molding to make semi-finished coal briquettes;

[0028] (2) Place the semi-finished coal briquettes produced in step (1) for 1 hour, then put it into the steam curing kettle, heat it up to 90°C in 2 hours, keep it for 6 hours, stop heating, and leave the kettle after 2 hours.

Embodiment 2

[0030] A kind of briquette, which is composed of the following materials according to mass percentage: 89% pulverized coal, 6% modified water glass, 5% water-based epoxy resin, and the particle size of pulverized coal is less than 3mm;

[0031] Modified water glass is glycerol acetate modified water glass;

[0032] The water-based epoxy resin is bisphenol F type water-based epoxy resin.

[0033] The preparation method includes the following steps: (1) After mixing 89kg of pulverized coal, 6kg of modified water glass and 5kg of water-based epoxy resin in proportion with a twin-shaft mixer, add 7kg of water and mix evenly, and press it with a double-roller rolling machine Forming to make semi-finished coal briquettes;

[0034] (2) Place the semi-finished coal briquettes produced in step (1) for 2 hours, then put them into the steam curing kettle, heat up to 100°C in 3 hours, stop heating after 8 hours, and leave the kettle after 2 hours.

Embodiment 3

[0036] A kind of briquette, which is composed of the following materials according to mass percentage: 87% of pulverized coal, 7% of modified water glass, 6% of water-based epoxy resin, and the particle size of pulverized coal is less than 3mm;

[0037] Modified water glass is glycerol acetate modified water glass;

[0038] The water-based epoxy resin is a phenolic water-based epoxy resin.

[0039] The preparation method includes the following steps: (1) After mixing 87kg of pulverized coal, 7kg of modified water glass and 6kg of water-based epoxy resin in proportion with a twin-shaft mixer, add 6kg of water and mix evenly, and press it with a double-roller rolling machine Forming to make semi-finished coal briquettes;

[0040] (2) Place the briquette semi-finished product made in step (1) for 1.5 hours, then put it into the steam curing kettle, heat it up to 95°C in 2.5 hours, keep it for 7 hours, stop heating, and leave the kettle after 2 hours.

[0041] The cold-state str...

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Abstract

The invention discloses a briquette and a preparation method thereof and belongs to the field of making of the briquettes. The briquette consists of the following substances in percentage by mass: 85 to 89 percent of pulverized coal, 6 to 8 percent of modified sodium silicate and 5 to 7 percent of waterborne epoxy resin. The briquette is prepared by steam curing. The preparation method comprises the following steps of: (1) after uniformly mixing the pulverized coal, the modified sodium silicate and the waterborne epoxy resin according to a certain ratio, adding water to be uniformly mixed and carrying out compression moulding to form a briquette semi-finished product; and (2) after standing the briquette semi-finished product for 1 to 2 hours, feeding the briquette semi-finishing product into a steam curing kettle, heating to the temperature of 90 to 100 DEG C, stopping heating after keeping for 6 to 8 hours and discharging the obtained product out of the kettle after stopping heating for 2 hours. The briquette disclosed by the invention has excellent cold-state and hot-state mechanical strengths and low breakage rate. In the gas production process, the briquette is not defeated or dispersed, is not cracked, does not influence the gas stream distribution and has good gas permeability when reacting in a gas producer.

Description

technical field [0001] The invention relates to a molded coal and a preparation method thereof, belonging to the field of molded coal manufacturing. Background technique [0002] The fuel used in the gasifier is lump coal, and the purchased lump coal is partly broken during transportation and dumping, so the pulverized coal produced cannot be directly used in the gasifier, resulting in waste of energy and increasing the cost of the gasifier. Therefore, how to make reasonable and effective use of this part of pulverized coal resources has become the key to reducing the gas production cost of the gas generator. [0003] So far, there are many types of coal briquettes that have been developed, but no matter which one, it is difficult to meet the cold and hot mechanical strength, thermal stability, water resistance and other indicators at the same time, and it will also increase the ash content of the briquette, It reduces the calorific value, produces secondary pollution, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L5/12C10L5/28
Inventor 朱伟信绍广宋延琦
Owner XINXING DUCTILE IRON PIPES CO LTD
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