Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for coal combustion

A coal and roasting technology, applied in the energy field, can solve the problems of difficulty in meeting the requirements of flue gas desulfurization efficiency and economy, low sulfur capacity and desulfurization accuracy, and flue contamination, etc., to improve efficiency, economy, and desulfurization accuracy. High, reducing the effect of flue dust accumulation

Inactive Publication Date: 2016-12-07
WENZHOU LEXIANG TECH INFORMATION CO LTD
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After years of research, although the types of desulfurizers have become more and more abundant, and the desulfurization performance has also been greatly improved, the sulfur capacity and desulfurization accuracy of the existing desulfurizers are still low, and it is difficult to meet the requirements of flue gas desulfurization for efficiency and economy.
[0004] At present, there is still a need for an economical and efficient coal-burning method to solve the problems of flue contamination and a large amount of ash accumulation in the coal-burning process, and to meet the urgent needs of flue gas desulfurization in industrial and civil fields.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for coal combustion
  • Method for coal combustion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Embodiment 1 prepares desulfurizer 1

[0052] Mix 400g of iron oxide, 200g of ferrous sulfate, 150g of fluorite and 80g of magnesium chloride evenly, the particle size of magnesium chloride and ferrous sulfate is 200-400μm, and the particle size of fluorite and iron oxide is 600-800μm. Add 50g of sodium borate and 70g of polybutylene succinate to the resulting mixture, mix well at 90°C-100°C, the particle size of polybutylene succinate is 300-500μm, and then mix it at 80-100°C Curing at 90°C for 20 hours, drying at 120°C to obtain mixture A, and then firing mixture A at 200°C for 2 hours to obtain roasted product A. The obtained calcined product was immersed in 200 g of polybutylene succinate at 120° C. for 8 hours at a constant temperature, then dried and cooled at 140° C. to obtain desulfurizing agent 1 . The number average molecular weight Mn of the polybutylene succinate used is 1.5×10 5 -2×10 5 .

Embodiment 2

[0053] Embodiment 2 prepares desulfurizer 2

[0054] Mix 500g of iron oxide, 280g of ferrous sulfate, 180g of fluorite and 120g of magnesium chloride evenly, the particle size of magnesium chloride and ferrous sulfate is 300-400μm, and the particle size of fluorite and iron oxide is 700-900μm. Add 90g of sodium borate and 100g of polybutylene succinate to the obtained mixture, mix uniformly at 110°C-120°C, the particle size of polybutylene succinate is 400-600μm, and then Cure at 23 hours for 23 hours, dry at 140°C, and then bake at 230°C for 1 hour. The obtained calcined product was immersed in 300 g of polybutylene succinate at 130° C. for 12 hours at a constant temperature, then dried and cooled at 150° C. to obtain desulfurizing agent 2 . The number average molecular weight Mn of the polybutylene succinate used is 1×10 5 -1.5×10 5 .

Embodiment 3

[0055] Embodiment 3 prepares desulfurizer 3

[0056] Mix 530g of iron oxide, 350g of ferrous sulfate, 200g of fluorite and 140g of magnesium chloride evenly, the particle size of magnesium chloride and ferrous sulfate is 400-500μm, and the particle size of fluorite and iron oxide is 900-1000μm. Add 130g of sodium borate and 150g of polybutylene succinate to the resulting mixture, mix uniformly at 110°C-120°C, the particle size of polybutylene succinate is 700-800μm, and then Cure for 25 hours at ℃, dry at 150℃, and then bake at 250℃ for 0.5 hours. The obtained calcined product was immersed in 450 g of polybutylene succinate at 140° C. for 10 hours at a constant temperature, then dried and cooled at 150° C. to obtain desulfurizer 3 . The number average molecular weight Mn of the polybutylene succinate used is 1×10 5 -1.5×10 5 .

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention belongs to the field of energy resources, and relates to a method for coal combustion. The method comprises the following steps: (1) mixing coal, water glass and calcium oxide, and performing combustion; (2) mixing oxygen-containing gas and a desulfurizer to obtain a mixture; (3) enabling flue gas generated in step (1) to contact with the mixture obtained in step (2) at 100 to 220 DEG C, and performing dust removal on the flue gas. A preparation method for the desulfurizer comprises the following steps: (1) mixing iron oxide, ferrous sulfate, fluorite and magnesium chloride; (2) adding sodium borate and poly(butylene succinate) into a mixture obtained in step (1), performing mixing at 90 to 120 DEG C, performing curing for 20 to 25 hours, and performing drying and roasting; (3) impregnating a roasting product obtained in step (2) in 120 to 200 DEG C poly(butylene succinate) at constant temperature, and performing drying and cooling. According to the method, the pollution degree of a flue is effectively reduced, the amount of deposited ash is reduced, and the desulfurization of the flue gas is higher.

Description

technical field [0001] The invention belongs to the field of energy, and in particular relates to a method for burning coal. Background technique [0002] The coal combustion process is often accompanied by serious contamination of the flue heating surface and a large amount of ash accumulation in the flue, which brings difficulties to the cleaning and maintenance of boilers and other combustion equipment. Moreover, the flue gas produced by coal combustion often contains sulfides. Sulphides are mainly derived from sulfur substances contained in coal or industrial raw materials. Sulfur substances react in the combustion process or industrial manufacturing process and are converted into sulfides and released. Sulfides, especially hydrogen sulfide and sulfur dioxide, often lead to poisoning and deactivation of catalysts in the production process, and the exhaust gas containing sulfides is directly discharged, which is easy to pollute the environment and cause air problems such...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C10L9/10B01D53/83B01D53/48
Inventor 林发绍
Owner WENZHOU LEXIANG TECH INFORMATION CO LTD