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Combustion catalyst for low-heat value coal

A combustion catalyst and catalyst technology, applied in the fuel, solid fuel, petroleum industry and other directions, can solve the problems of difficult to promote the combustion process of mixed coal, low decomposition temperature of strong oxidants, unstable combustion process, etc., and achieve large-scale production. , the effect of reducing land occupation and reducing air pollution

Inactive Publication Date: 2013-09-18
河北博昶商贸股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The combustion characteristics of low-value coal are different from those of high-quality coal. The occurrence characteristics of low volatile matter and high ash content in low-value coal often lead to difficult ignition, unstable combustion process, and severe slag.
The strong oxidant used in existing coal combustion catalysts has a low decomposition temperature, even lower than the ignition temperature of coal powder, and it is difficult to promote the combustion process of mixed coal

Method used

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  • Combustion catalyst for low-heat value coal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] In weight percentage, the Ca 3 co 4 o 9 70%, Fe 3 o 4 25%, K 2 O 5% is ground and mixed, and crosses 100 mesh sieves to make the main active ingredient, and then gets the aforementioned main active ingredient 80% and sodium humate 20% to grind and mix, and crosses 100 mesh sieves to obtain the catalyst.

[0037] The low-value raw coal from Suntuan Coal Mine of Huainan Mining Group was naturally air-dried, ground, and passed through a 100-mesh sieve. Take 10g of coal sample, add 0.1g of catalyst powder according to 1% of the coal amount, grind and mix. The mixture sample was placed in a corundum crucible, and thermogravimetric analysis was carried out in an air atmosphere on a synchronous thermal analyzer (NETZSCH STA 409 PC). The results are compared in figure 1 .

[0038] Depend on figure 1 It can be seen that the upper line is the combustion curve of low-value raw coal, and the lower line is the combustion curve after adding the catalyst of the present i...

Embodiment 2

[0041] In weight percentage, the Ca 3 co 4 o 9 80%, Fe 3 o 4 15%, CeO 25% was ground and mixed, and passed through a 100 mesh sieve to make the main active ingredient, and then 70% of the previously prepared main active ingredient was ground and mixed with 30% potassium fulvic acid, and passed through a 100 mesh sieve to obtain the catalyst.

[0042] The washed medium coal, coal slime and coal gangue from a coal washing and preparation plant of Huainan Mining Group were naturally air-dried, ground, and passed through a 100-mesh sieve. According to the weight ratio, the washed medium coal, coal slime and coal gangue were mixed in a ratio of 4:3:3 respectively, and the mixed coal samples were obtained by using the heap cone quartering method. Take 10 g of coal sample, add 0.2 g of catalyst powder according to 2% of the coal amount, grind and mix. The mixture sample was placed in a corundum crucible, and thermogravimetric analysis was carried out in an air atmosphere ...

Embodiment 3

[0045] In weight percentage, the Ca 3 co 4 o 9 60%, CeO 2 20%, K 2 O 20%, grind and mix, and pass through a 100-mesh sieve to obtain a catalyst.

[0046] Sun Tuan low-value raw coal from Huainan Mining Group was naturally air-dried, ground, and passed through a 100-mesh sieve. Take 10 g of coal sample, add 0.15 g of catalyst powder according to 1.5% of the coal amount, grind and mix. The mixture sample was placed in a corundum crucible, and thermogravimetric analysis was carried out in an air atmosphere on a synchronous thermal analyzer (NETZSCH STA 409 PC), and carried out in an automatic calorimeter (ZDHW-6) according to the national standard GB / T213-2003 method Cartridge heat measurement. The results show that after adding the catalyst, the light-off temperature of low-value raw coal decreases by 12 ℃, and the low-value calorific value increases by 3.4%.

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Abstract

The invention provides a combustion catalyst for low-heat value coal. The catalyst comprises 20-100% of main active ingredients and the balance of binder, wherein the main active ingredients comprise Ca3Co4O9, Fe304, CeO2, and K2O in percentage by weight. The catalyst provided by the invention can be used for effectively reducing the initiation temperature of the low-heat value coal, the initiation temperature of the low-heat value coal can be reduced by 3-15 DEG C when the catalyst which accounts for 1-2% of the low-heat value coal is added, stable initiation of the low-heat value coal is achieved, the continuous and complete combustion of the low-heat value coal is promoted, the combustion efficiency and burning clarity of the low-heat value coal are improved, the utilization ratio of the coal is improved, and resource waste and air pollution are reduced.

Description

[0001] technical field [0002] The invention relates to a catalyst for burning coal, in particular to a combustion catalyst for low-value coal or mixed coal. Background technique [0003] Coal is the main energy source in my country, accounting for about 70% of the national energy. A large number of low-value coals produced in the coal production process, such as medium coal, coal slime and coal gangue. These low-value coals have problems such as low calorific value and serious slagging, and are difficult to be fully utilized, resulting in the formation of slag stockpiles, resulting in huge waste of resources and environmental damage. In order to make full use of these resources, the method of blending these low-value coals with high-quality coals is generally used, such as coal combustion in power plant boilers. However, due to the large difference in combustion chemical characteristics between low-value coal and high-quality coal, the combustion process is unstable. In ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L9/10
CPCY02A50/20
Inventor 冯绍杰章祥林宋箭
Owner 河北博昶商贸股份有限公司
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