Air gas primary heater unit of hot-air stove

A gas preheating and hot blast stove technology, applied in air heaters, fluid heaters, lighting and heating equipment, etc., can solve the problems of not meeting the high air temperature of 1200°C and the flue exhaust gas temperature is not too high, so as to overcome the damage , improve the service life, the effect of low operating costs

Inactive Publication Date: 2008-05-21
袁长胜
View PDF0 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the general lack of coke oven gas with high calorific value in iron and steel enterprises, and the temperature of the flue gas is not too high, the use of separate heat pipe technology can only preheat the air and gas to about 140°C, which can increase the air temperature by about 80-90°C , still can not meet the needs of high wind temperature of 1200 ℃

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
  • Air gas primary heater unit of hot-air stove
  • Air gas primary heater unit of hot-air stove

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1: As shown in Figure 1, the preheating system is a one-time preheating device, wherein 1 is a combustion mixing furnace, 2 is a gas heat exchanger, 3 is an air heat exchanger, 4 is an induced draft fan, and 5 is a valve , 6 is a regulating valve, 7 is a hot blast stove, and 8 is a chimney. The air heat exchanger and gas heat exchanger of the preheating device are tube-type, and the flue gas of the hot blast stove is introduced into the mixing chamber on the upper part of the combustion mixing furnace by a high-temperature induced draft fan (see Figure 3), and the high-temperature flue gas produced by the combustion mixing furnace Mixing, so that the temperature of the mixed flue gas reaches 500-600°C, the mixed high-temperature flue gas enters the air heat exchanger and the gas heat exchanger respectively, and after heat exchange, the air and gas entering the hot blast stove are heated to 300°C, and the remaining exhaust into the chimney.

[0012] The combu...

Embodiment 2

[0014] Embodiment 2: As shown in Figure 2, the preheating system is a secondary preheating device, or a segmented preheating device, wherein 9 is a high-temperature air heat exchanger, and the rest of the labels are the same as in Embodiment 1.

[0015] The segmented preheating device also adopts tube and tube type (the tube bundle is bare tube, after high temperature immersion aluminum, high temperature resistance, corrosion resistance) air heat exchanger and gas heat exchanger, first use the flue gas of the hot blast stove to preheat the air and gas to 200°C; then use the flue gas induced draft fan to introduce the flue gas of the hot blast stove into the mixing chamber on the upper part of the combustion mixing furnace (see Figure 3), and mix it with the high-temperature flue gas generated by the combustion mixing furnace, so that the temperature of the mixed flue gas reaches 550-700 ℃, use this flue gas to preheat the combustion air that has been preheated to 200 ℃ to 450 ℃...

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

No PUM Login to view more

Abstract

The invention provides an air and coal gas preheating device of an air heating furnace and comprises a combustion mixing furnace, an air heat interchanger, a coal gas heat interchanger and an assorted blower as well as a valve. A draft fan is adopted to lead waste gas in a flue of the air heating furnace into a mixing chamber of the combustion furnace and then waste gas is mixed with high temperature flue gas generated by the combustion furnace so that air and coal gas can be heated while mixed flue gas conducts heat exchanging. A high temperature air heat interchanger is added on the basis of the preheating device so that the preheating device can become a second preheating device; the second preheating device preheats air and coal gas with flue in the air heating furnace and then leads waste gas in the flue of the air heating furnace into the mixing chamber of the combustion furnace with the high temperature draft fan, moreover, waste gas is mixed with high temperature flue gas and combustion-supporting air is preheated secondly. The invention not only takes use of afterheat of large amount of low temperature waste gas, but also transforms coal gas with low thermal valve into wind temperature with high value, meanwhile, the invention preheats combustion-supporting air and has the advantages of compact structure, reasonable arrangement, low investment, low operation cost, etc.

Description

technical field [0001] The invention relates to an accessory equipment of a hot blast stove, in particular to an air and gas preheating device for a hot blast stove with an additional combustion mixing stove. Background technique [0002] With the advancement of ironmaking technology, the coke ratio of blast furnaces has decreased year by year, resulting in a decrease in the calorific value of blast furnace gas. Generally, the calorific value of blast furnace gas is only 3000KJ / m 3 For example, the air temperature of the single-fired blast furnace gas in the hot blast stove can only reach about 1000-1050 °C, which cannot meet the needs of high air temperature at all. Therefore, domestic ironworks have taken many measures to increase the air temperature, such as co-firing coke oven gas with high calorific value, using waste heat of hot blast stove flue gas to preheat air and gas, etc. Due to the general lack of coke oven gas with high calorific value in iron and steel enterp...

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): F24H3/12F24H9/18F23L15/00F23K5/20
CPCY02E20/34
Inventor 袁长胜
Owner 袁长胜
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap