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A method and system for generating a drying medium

A drying medium and flue gas furnace technology, which is applied in the direction of combustion methods, block/powder fuel preparation, combustion equipment, etc., can solve the problems of high fuel cost generated by dry medium, high oxygen content in the system, and existing safety problems, and achieve reduction Fuel cost, low system oxygen content, low cost effect

Active Publication Date: 2015-11-18
WISDRI ENG & RES INC LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these industries do not have blast furnace gas and hot blast stove exhaust gas available, and the drying medium generally uses a mixture of high-temperature flue gas and air from the flue gas furnace; flue gas furnaces generally use natural gas, liquefied gas or fuel oil as fuel, and the drying medium of the pulverizing process in these industries The cost of generating fuel is high, the oxygen content of the system is high, and there are potential safety hazards in the process of preparing bituminous coal powder

Method used

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  • A method and system for generating a drying medium

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Experimental program
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Effect test

Embodiment 1

[0024] Embodiment 1: as figure 1 As shown, at the initial stage of operation of the pulverizing unit 13, the flue gas furnace unit 1 is started, and the flue gas furnace unit 1 uses the fuel oil provided by the oil supply station 5 to the fuel burner 3 as fuel, and combusts with the air blown by the combustion-supporting fan 4 to generate high-temperature smoke. The high-temperature flue gas is mixed with air to form a drying medium to prepare anthracite powder; after the anthracite powder is prepared, it enters the coal powder bin 14 for storage. The pulverized coal delivery unit 11 transports part of the pulverized coal to the pulverized coal collection unit 7 through the pulverized coal delivery unit 12 (most of the pulverized coal is delivered to the industrial furnace 15 in production through the pulverized coal delivery unit 11, and the bag powder collector 8 is a back-blowing collector. Pulverizer, used for pulverized coal conveying gas (nitrogen, pulverized coal convey...

Embodiment 2

[0025] Embodiment 2: as figure 1 As shown, a system for generating a drying medium includes: a flue gas furnace unit 1, a pulverized coal collection unit 7, a tail gas circulation unit 10, a pulverized coal conveying unit 11, and a pulverizing unit 13; the outlet of the flue gas furnace unit 1 Connected to the entrance of the pulverizing unit 13; the flue gas furnace unit 1 is provided with a pulverized coal burner 2 and a fuel burner 3, and is equipped with an oil supply station 5 and a combustion-supporting fan 4; the combustion-supporting fan 4 The outlet pipeline is divided into two, which are respectively connected with the pulverized coal burner 2 and the fuel burner 3, and the fuel burner 3 is used for mixed combustion of fuel and air; the top of the pulverized coal collection unit 7 is provided with a cloth bag Pulverizer 8, bag pulverizer 8 is back-blowing type pulverizer, is used for the discharge of pulverized coal conveying gas (nitrogen, coal pulverized conveying ...

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Abstract

The invention relates to a method and a system thereof for generating a drying medium. The method comprises the steps that a fume furnace unit is started, the fume furnace unit generates the drying medium by mixing the high-temperature fume generated by combusting of fuel oil and air, and the smoke-free coal powder is prepared; the coal power enters a coal powder bin for storing, a coal powder conveying unit conveys part of the coal powder to a coal powder collecting unit by a powder returning unit; the coal powder of the coal powder collecting unit enters the fume furnace unit for combusting by a feeding unit and generates high-temperature fume; meanwhile, an adjusting valve on a tail gas circulation unit is started to introduce the tail gas generated by a powder preparing unit to a wind mixing chamber of a fume furnace, and the tail gas is mixed with the high-temperature fume generated by combusting of the coal powder to generate the drying medium. The system comprises the fume furnace unit, the coal powder collecting unit, the tail gas circulating unit, the coal powder conveying unit, the powder preparing unit and the like. According to the method and the system thereof for generating the drying medium, the coal powder is used as the fuel for the fume furnace, so the fuel cost is reduced compared with that of fuel oil combusting; the safety of powder preparing unit is improved and the tail gas emission is reduced.

Description

technical field [0001] The invention relates to a method for generating a drying medium and a system thereof, in particular to a method for generating a drying medium and a system for reducing fuel costs and oxygen content of a pulverized coal preparation device. Background technique [0002] In the iron and steel industry, during the preparation of pulverized coal for blast furnace coal injection, a drying medium is required to dry the raw coal, carry the pulverized coal for transfer and separation, and inert the system. The drying medium generally uses the exhaust gas of the hot blast furnace and the high-temperature smoke generated by the combustion of the flue gas furnace. Blast furnace gas is generally used as the fuel for the flue gas furnace. The cost of the fuel generated by the drying medium is low. The oxygen content of the pulverizing system is easy to control and has a high safety factor. [0003] In industries such as non-ferrous metallurgy, coal chemical indust...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23K1/00
Inventor 周少丰汤楚雄周强闫朝付司敬芝李啸磊
Owner WISDRI ENG & RES INC LTD