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Coal burning method

A coal-burning and flue gas technology, applied in the energy field, can solve problems such as difficulty in meeting the requirements of flue gas desulfurization efficiency and economy, low sulfur capacity and desulfurization precision, and flue contamination, so as to improve efficiency and economy, High desulfurization precision and the effect of reducing dust accumulation in the flue

Inactive Publication Date: 2017-01-11
WENZHOU LEXIANG TECH INFORMATION CO LTD
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  • 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

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Embodiment 1 prepares desulfurizer 1

[0050] Mix 400g of magnesium oxide, 200g of manganese carbonate, 150g of calcium carbide and 80g of coke evenly, the particle size of magnesium oxide and manganese carbonate is 200-400μm, and the particle size of calcium carbide and coke 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. Then, the mixture A was calcined at 200° C. for 2 hours to obtain a calcined product A. The obtained calcined product A 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 desulfurizer 1 . The number average molecular weight Mn of the polybutylene succinate used is 1.5×10 5 -2×10 5 .

Embodiment 2

[0051] Embodiment 2 prepares desulfurizer 2

[0052] Mix 520g of magnesium oxide, 280g of manganese carbonate, 180g of calcium carbide and 120g of coke evenly, the particle size of magnesium oxide and manganese carbonate is 300-400μm, and the particle size of calcium carbide and coke 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

[0053] Embodiment 3 prepares desulfurizer 3

[0054] Mix 560g of magnesium oxide, 330g of manganese carbonate, 220g of calcium carbide and 170g of coke evenly, the particle size of magnesium oxide and manganese carbonate is 400-500μm, and the particle size of calcium carbide and coke 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 1.5×10 5 -2×10 5 .

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Abstract

The invention belongs to the field of energy and relates to a coal burning method. The method comprises steps as follows: 1) coal, water glass and calcium oxide are mixed and burnt; 2) smoke produced in burning makes contact with a desulfurizing agent at the normal temperature, and then dust removal is performed on the smoke; a preparation method of the desulfurizing agent comprises steps as follows: (1) magnesium oxide, manganese carbonate, calcium carbide and coke are mixed; (2) sodium borate and poly(butylene succinate) are added to the mixture obtained in the step (1), and the mixture is mixed at 90-120 DEG C, cured for 20-25 h, dried and roasted; (3) the roasted material obtained in the step (2) is placed in poly(butylene succinate) at 120-200 DEG C for constant-temperature impregnation and then is dried and cooled, and the desulfurizing agent is prepared. With the method, the flue contamination degree is effectively reduced, the dust deposition amount is reduced, and the desulfurizing efficiency is improved.

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

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23K1/00F23J15/02B01D53/50B01D53/81
CPCF23K1/00B01D53/50B01D53/81B01D2258/0283F23J15/02F23J2215/20F23K2201/505
Inventor 林发绍
Owner WENZHOU LEXIANG TECH INFORMATION CO LTD