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A method for recovery and utilization of waste heat in the process of light burning of magnesite

A waste heat recovery and magnesite technology, applied in the field of magnesite smelting, can solve the problems of not effectively utilizing light-burned magnesia products, not specifying the multi-stage preheating system process, heat loss, etc., so as to reduce heat energy and fuel. Consumption, the effect of reducing coal consumption

Active Publication Date: 2021-09-21
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention uses the waste heat of the flue gas to preheat the dried magnesite raw material through a multi-stage preheating system. However, this invention does not specify the process of the multi-stage preheating system, and does not effectively utilize the waste heat of the lightly burned magnesium product. caused a large loss of heat

Method used

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  • A method for recovery and utilization of waste heat in the process of light burning of magnesite
  • A method for recovery and utilization of waste heat in the process of light burning of magnesite
  • A method for recovery and utilization of waste heat in the process of light burning of magnesite

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Experimental program
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Effect test

Embodiment 1

[0020] like figure 1 As shown in the figure, firstly, the clean gas is passed into the burner of the magnesite calciner, and the hot flue gas generated by the combustion rapidly calcines the magnesite powder through the gas-solid action, and the product passes through the cyclone, and the obtained high-temperature light-burned powder is It is sent to the product cyclone heat exchanger, and the heat energy of the product is used to heat the air blown by the induced draft fan, and then the preheated air is passed to the burner of the magnesite calciner after filtering and dust removal to improve the combustion efficiency and the product cyclone heat exchange. The number of separators is 1, and the light-burned magnesium product after being filtered and dedusted and cooled by the product cyclone heat exchanger is transported to the storage tank; the high-temperature flue gas obtained by the cyclone separator is passed through the flue gas cyclone heat exchanger. The raw magnesite...

Embodiment 2

[0022] like figure 2 As shown in the figure, firstly, the clean gas is passed into the burner of the magnesite calciner, and the hot flue gas generated by the combustion rapidly calcines the magnesite powder through the gas-solid action, and the product passes through the cyclone, and the obtained high-temperature light-burned powder is It is sent to the product cyclone heat exchanger, and the heat energy of the product is used to heat the air blown by the induced draft fan, and then the preheated air is passed to the burner of the magnesite calciner after filtering and dust removal to improve the combustion efficiency and the product cyclone heat exchange. The number of separators is 1, and the light-burned magnesium product after being filtered and dedusted and cooled by the product cyclone heat exchanger is transported to the storage tank; the high-temperature flue gas obtained by the cyclone separator is passed through the flue gas cyclone heat exchanger. The raw magnesit...

Embodiment 3

[0024] like image 3 As shown in the figure, firstly, the clean gas is passed into the burner of the magnesite calciner, and the hot flue gas generated by the combustion rapidly calcines the magnesite powder through the gas-solid action, and the product passes through the cyclone, and the obtained high-temperature light-burned powder is It is sent to the product cyclone heat exchanger, and the heat energy of the product is used to heat the air blown by the induced draft fan, and then the preheated air is passed to the burner of the magnesite calciner after filtering and dust removal to improve the combustion efficiency and the product cyclone heat exchange. The number of separators is 2, and the light-burned magnesium product after being filtered and dedusted and cooled by the product cyclone heat exchanger is transported to the storage tank; the high-temperature flue gas obtained by the cyclone The raw magnesite powder is preheated, the number of flue gas cyclone heat exchang...

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Abstract

A method for recovering and utilizing waste heat in the process of light burning of magnesite, which relates to a method for smelting magnesite. First, the clean gas is passed into the burner of the magnesite calciner, and the hot flue gas produced by the combustion is rapidly absorbed by the gas-solid action. Calcined magnesite powder, the product passes through the cyclone separator, and the high-temperature lightly burned powder obtained is sent to the product cyclone heat exchanger, and the heat energy of the product is used to heat the air blown by the induced draft fan, and then the preheated The air is passed into the burner of the magnesite calciner to improve the combustion efficiency, and the light-burned magnesium product after being filtered and dusted and cooled by the product cyclone heat exchanger is transported to the storage tank; the high-temperature flue gas obtained by the cyclone separator , the preheated magnesite powder and the fine magnesite powder obtained by filtering and dedusting are transported to the calciner. The number of flue gas cyclone heat exchangers and product cyclone heat exchangers varies between 1-6 and can be matched arbitrarily. The invention improves the waste heat recovery of products and flue gas, and achieves the purpose of energy saving and emission reduction.

Description

technical field [0001] The invention relates to a magnesite smelting method, in particular to a method for recycling and utilizing waste heat in a magnesite light burning process. Background technique [0002] China is one of the countries with the richest magnesite resources in the world, with total reserves of about 3 billion tons of ore, accounting for 25% of the world's total reserves. Among them, Liaoning magnesite reserves are the most abundant, accounting for 85.6% of the national total reserves, mainly concentrated in Dashiqiao and Haicheng areas, with an annual mining volume of about 12-15 million tons. Magnesite is the main raw material for the preparation of magnesium compounds. Light-burned magnesium is obtained by calcining magnesite and is widely used in building materials, chemical industry, metallurgy, medicine and other fields. It is an ideal material for magnesium sulfate, papermaking, sulfur removal process, and slag splashing in steel plant protection fu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B2/10C04B2/00F27D15/02F27D17/00
CPCC04B2/00C04B2/102F27D15/02F27D17/004F27D17/008Y02P10/25
Inventor 许光文韩振南程继光何伟刘雪景安萍王永生于泮杰
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY