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Moulded coal used for decoupling burning and method of producing the same

A technology for briquetting and burning coal, applied in the field of briquette and its preparation, can solve the problems of poor thermal stability in the high-temperature combustion area of ​​semi-coke, affecting the environmental protection effect, and incapable of adding a sufficient amount, so as to alleviate the shortage of fuel oil supply and achieve outstanding environmental protection effects. , the effect of low production cost

Inactive Publication Date: 2008-02-27
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when desulfurizers and combustion accelerants are added to the briquettes used in the prior art, due to the limitation of the strength and calorific value reduction of the briquettes, there is a problem that a sufficient amount cannot be added, which affects the environmental protection effect.
In addition, due to the sequence of low-temperature anoxic combustion in the decoupling combustion process, followed by high-temperature semi-coke combustion, when several types of briquettes are used in decoupled combustion furnaces, they are prone to low-temperature anoxic combustion in the gasification chamber. Coking, poor thermal stability (easy to break prematurely) and serious slagging in the semi-coke high-temperature combustion zone

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Use method of the present invention to prepare the briquette for decoupling combustion of the present invention, concrete operation is as follows:

[0032] 1. Prepare raw materials:

[0033] Bituminous coal (low calorific value Q y DW≮5500Kcal / Kg, volatile content V y ≮25%), anthracite (low calorific value Q y DW≮5500Kcal / Kg), sulfur fixative, combustion improver, stabilizer, water glass (sodium silicate Na 2 Sio 3 Below 40 Baume degrees).

[0034] 2. Prepare production equipment: pulverizer, mixer, molding machine, weighing equipment, auxiliary equipment, etc.

[0035] 3. Prepare the mixture:

[0036] Get the hydroxypropyl methylcellulose stabilizer solid particle and pour it into clean tap water, stir it evenly with a stick to make an aqueous solution of the stabilizer, and the concentration by weight of the stabilizer contained in the aqueous solution of the stabilizer is 0.08%; After hours, it is ready to use.

[0037] The above-mentioned stabilizer aqueous ...

Embodiment 2

[0051] Use method of the present invention to prepare the briquette for decoupling combustion of the present invention, concrete operation is as follows:

[0052] Step 1 and 2 are the same as embodiment 1

[0053] Step 3, prepare the mixture:

[0054] Get the hydroxypropyl methylcellulose stabilizer solid particle and pour it into clean tap water, stir it evenly with a stick to make an aqueous solution of the stabilizer, and the concentration by weight of the stabilizer contained in the aqueous solution of the stabilizer is 0.12%; After hours, it is ready to use.

[0055] The above-mentioned stabilizer aqueous solution and water glass are prepared in a ratio of 17:83 by weight. When preparing, the water glass is slowly poured into the stabilizer aqueous solution and stirred evenly; the mixed solution is sealed and stored for 72 hours. Valid for use within;

[0056] Step 4, proportioning raw coal:

[0057] Take the above-mentioned bituminous coal and anthracite according to...

Embodiment 3

[0069] Using the method of the present invention to prepare the briquette for decoupling combustion of the present invention, the specific operations are as follows:

[0070] Steps 1 and 2 are the same as in Example 1;

[0071] Step 3. Prepare the mixture:

[0072] Pour the hydroxypropyl methylcellulose stabilizer solid particles into clean tap water, stir evenly with a stick, and prepare an aqueous stabilizer solution. The weight percentage concentration of the stabilizer contained in the stabilizer aqueous solution is 0.10%; Hours later, it can be used.

[0073] The above-mentioned stabilizer aqueous solution and water glass are prepared in a proportion of 23:77 by weight, and the water glass is slowly poured into the stabilizer aqueous solution during preparation, and stirred evenly; the mixed solution is sealed and stored for 72 hours after preparation. Effective for internal use;

[0074] Step 4. Proportion of raw coal:

[0075] The above-mentioned bituminous coal and...

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Abstract

The invention discloses a combustion decoupling coal and preparing method, which comprises the following parts: fire coal made of bituminite and anthracite with weight rate at 70-80: 30-20, stable composite liquid composed of stabilizer solution and soluble glass with weight rate at 17-23: 83-77 and the weight percentage density of the stabilizer at 0. 08%-0. 12%, methyl hydroxypropylcellulose as the stabilizer; using calcium lime as sulfur fixing agent with content as 1. 4-1. 8 times as fire coal, 1%-2% potassium nitrate combustion adjuvant. The invention has stable source for raw material of molded coal, good using and storing property, low preparing cost, which realizes desulfurizing, denitrating, dedusting and environment protection, which can replace fuel to reduce combusting cost greatly and release insufficiency of the fuel.

Description

technical field [0001] The invention belongs to the field of shaped coal and its preparation method, in particular to a shaped coal used for decoupling combustion and its preparation method. Background technique [0002] In order to realize large-scale commercial application of briquette coal for combustion, the briquette coal must have the characteristics of low cost per unit heat value, high cold strength, and good water resistance. The briquettes used in the prior art are divided into 10% to 20% bentonite, clay, 3% to 6% sodium humate and cement as binders. The former two are low in cost, but not waterproof and low in cold strength; the latter two are good in water resistance and high in cold strength, and can be used normally in most boilers. However, when desulfurizers and combustion accelerants are added to the briquettes used in the prior art, there is a problem that a sufficient amount cannot be added due to restrictions such as the strength of the briquettes and th...

Claims

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Application Information

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IPC IPC(8): C10L5/04
Inventor 郝江平高士秋宋文立李俊峰董利
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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