阅读说明：本技术 一种型煤免烘干成型方法 (Drying-free forming method for molded coal ) 是由 孟爱国 孟爱虎 孟诗怡 于 2019-09-11 设计创作，主要内容包括：一种型煤免烘干成型方法,包括如下步骤：a、配煤后,将煤打碎为煤粉；b、加入脱硫固硫剂、熔结剂,搅拌均匀；c、热压成型；d、在高温无氧环境下脱水,使内部水分气化；e、置于常温下冷却成型。本发明打破了现有型煤加工中在高含水量情况下才能成型,然后再加热烘干的加工步骤,利用无氧高温烟气对型煤加热,使其内部水分迅速气化向外溢出,当脱水至型煤含水量2.3-4%时,将型煤置于常温条件下迅速冷却成型,成型后的型煤无论在硬度,防水性和韧性上都较现有的型煤有了极大提高。(a drying-free forming method of molded coal comprises the following steps: a. after blending, crushing the coal into coal powder; b. adding a desulfurization sulfur-fixing agent and a sintering agent, and uniformly stirring; c. hot-press forming; d. dehydrating in high-temperature oxygen-free environment to gasify the internal water; e. and cooling and forming at normal temperature. The invention breaks the processing steps that the molded coal can be molded under the condition of high water content in the existing molded coal processing, and then is heated and dried, oxygen-free high-temperature flue gas is utilized to heat the molded coal, so that the water in the molded coal is rapidly gasified and overflows outwards, when the water content of the molded coal is dehydrated to 2.3-4%, the molded coal is rapidly cooled and molded under the normal temperature condition, and the molded coal has greatly improved hardness, waterproofness and toughness compared with the existing molded coal.)

1. A drying-free forming method of molded coal is characterized in that: the method comprises the following steps:

a. After blending, crushing the coal into coal powder;

b. Adding a desulfurization sulfur-fixing agent and a sintering agent, and uniformly stirring;

c. hot-press forming;

d. Dehydrating in high-temperature oxygen-free environment to gasify the internal water;

e. And cooling and forming at normal temperature.

2. The drying-free forming method of the molded coal as claimed in claim 1, which is characterized in that: in step c, the hot pressing temperature is 140-.

3. The drying-free forming method of the molded coal as claimed in claim 1, which is characterized in that: in the step d, the internal water of the briquette is dehydrated to be 2.3-4% of the mass of the briquette.

4. the drying-free forming method of the molded coal as claimed in claim 1, which is characterized in that: in the step d, the dehydration temperature is 270-350 ℃.

5. the drying-free forming method of the molded coal as claimed in claim 2, which is characterized in that: in the step c, the coal powder is hot-pressed and formed in a high-temperature oxygen-free environment.

6. The drying-free forming method of briquette coal as claimed in any one of claims 1 to 5, which is characterized in that: in the step d, the heat source required for dehydration is from oxygen-free combustion flue gas.

Technical Field

The invention relates to a processing method of briquette, in particular to a drying-free forming method of briquette.

Background

Coal is the main energy in China, the coal consumption in China is the first in the world, in modern industrial production, raw coal can be processed into molded coal and then used, in the molded coal processing, 11% of water by mass of the molded coal is needed for molding, and drying is carried out after molding is finished, wherein the drying time is about 2.5h, the time consumption is long, the energy is wasted, the dehydration effect is poor, and the dehydrated molded coal is poor in hardness and easy to break.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a drying-free forming method of molded coal.

the technical scheme adopted by the invention is as follows: a drying-free forming method of molded coal comprises the following steps: a. after blending, crushing the coal into coal powder; b. adding a desulfurization sulfur-fixing agent and a sintering agent, and uniformly stirring; c. hot-press forming; d. dehydrating in high-temperature oxygen-free environment to gasify the internal water; e. and cooling and forming at normal temperature.

The drying-free forming method of the molded coal is characterized by comprising the following steps: in step c, the hot pressing temperature is 140-.

The drying-free forming method of the molded coal is characterized by comprising the following steps: in the step d, the internal water of the briquette is dehydrated to be 2.3-4% of the mass of the briquette.

The drying-free forming method of the molded coal is characterized by comprising the following steps: in the step d, the dehydration temperature is 270-350 ℃.

The drying-free forming method of the molded coal is characterized by comprising the following steps: in the step c, the coal powder is hot-pressed and formed in a high-temperature oxygen-free environment.

The drying-free forming method of the molded coal is characterized by comprising the following steps: in the step d, the heat source required for dehydration is from oxygen-free combustion flue gas.

The invention adopts oxygen-free combustion flue gas to heat and dehydrate the molded coal, the oxygen-free flue gas can be from other combustion equipment in the same factory, and compared with the prior method of burning and drying by using coal gas, the invention greatly saves energy; the invention breaks the processing steps that the molded coal can be molded under the condition of high water content in the existing molded coal processing, and then is heated and dried, oxygen-free high-temperature flue gas is utilized to heat the molded coal, so that the water in the molded coal is quickly gasified and overflows outwards, and when the molded coal is dehydrated to the water content of 2.3-4%, the molded coal is quickly cooled and molded under the normal temperature condition, and the invention is specifically based on the following principle: the existing molded coal is molded under the condition of low temperature (the temperature is lower than the boiling point of water), the internal water is liquid water, the molded coal can be effectively molded when the content of the liquid water reaches a certain amount, and experiments prove that the molded coal can be effectively molded as long as the volume of the water contained in the molded coal reaches a certain proportion even when the part of the water is gaseous, and the molded coal is greatly improved in hardness, waterproofness and toughness compared with the existing molded coal. As is known, after liquid water is gasified, the volume is expanded by more than 1000 times, so that repeated production practice verifies that the molded coal completely has bonding conditions when the mass proportion of water in the molded coal is 2.3-4% under the anaerobic condition of high temperature (270 plus 350 ℃), can be cooled and molded, and the molded coal does not need to be dehydrated, thereby greatly saving energy consumption, improving the production efficiency and reducing the production cost.

The hardness, the water resistance and the toughness of the molded coal are greatly improved between the collection and the release of the water content.

Detailed Description