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Method for obtaining high air temperature with low calorific value gas and high-temperature combustion air

A technology of combustion-supporting air and low calorific value, applied in blast furnaces, blast furnace details, blast furnace parts, etc., can solve the problems of poor combustion and energy storage effect of top-fired hot blast stoves, increased maintenance and operation costs, and high investment costs, and achieves the idea of Unique and practical, conducive to widespread promotion and application, and the effect of reducing investment costs

Inactive Publication Date: 2013-10-09
ZHENGZHOU ANNEC IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing known technology and the current situation have shortcomings, defects and disadvantages such as large floor area, high investment cost, cumbersome operation, increased maintenance and operation cost, laborious and laborious, and poor combustion and energy storage effect of the top-fired hot blast stove.

Method used

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  • Method for obtaining high air temperature with low calorific value gas and high-temperature combustion air

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Effect test

specific Embodiment approach 1

[0026] The present invention will be described in detail below in conjunction with the accompanying drawings. As shown in the accompanying drawings:

[0027] A method for obtaining high air temperature by using low-calorific-value gas and high-temperature combustion-supporting air, the method comprising the following steps:

[0028] ①. The air at normal temperature is sent through the heat exchanger 14 in the flue 4 to obtain low-temperature combustion-supporting air;

[0029] ②. Pass the low-temperature combustion-supporting air through the regenerator bed of the hot blast stove that has just sent the air to obtain high-temperature combustion-supporting air;

[0030] ③. Send the high-temperature combustion-supporting air and low calorific value gas into the hot blast stove burner to obtain the required high flame combustion temperature and required high top temperature, and then obtain the required high blast temperature.

[0031] In the method for obtaining high air temper...

specific Embodiment approach 2

[0032] The present invention will be described in detail below in conjunction with the accompanying drawings. As shown in the accompanying drawings:

[0033] A device for realizing the method of obtaining high wind temperature by using low-calorific-value gas and high-temperature combustion-supporting air, that is, a device for obtaining high-wind temperature by using low-calorific-value gas and high-temperature combustion-supporting air. A furnace 1, B furnace 2, The C furnace 3 and the chimney 5 are all arranged on the flue 4, and the side of the lower end of the A furnace 1, the A valve 6, and the flue 4 are fixedly connected by pipelines, and the side of the B furnace 2 lower end, the B valve 7, The flue 4 is fixedly connected through pipelines, the side of the lower end of the C furnace 3, the C valve 8, and the flue 4 are fixedly connected through pipelines, and its fan 12, D valve 13, heat exchanger 14, E valve 15 and A furnace 1 The other side of the lower end, and th...

specific Embodiment approach 3

[0034] The present invention will be described in detail below in conjunction with the accompanying drawings. As shown in the accompanying drawings:

[0035]In the method of obtaining high wind temperature with low-calorific-value gas and high-temperature combustion-supporting air, in order to make reasonable use of the flue gas temperature in the flue 4, the fan 12, the D valve 13, and the H valve 18 are always in the normally open state, so as to pass The heat exchanger 14 in the flue 4 makes the temperature of the exhausted flue gas effectively and fully utilized; at the same time, the wind coming out of the heat exchanger 14 passes through the heat storage body of the top-fired hot blast stove itself in series to realize Fully warm up again;

[0036] ①, A furnace process optimization:

[0037] First open the W valve 33, close the C valve 8, G valve 17, N valve 24, close the K valve 21, Q valve 27, T valve 30 so as to stop the work of the C burner 11, and the wind source ...

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Abstract

The invention relates to a method for obtaining high air temperature with low calorific value gas and high-temperature combustion air, and relates to the technical field of heat energy. The method comprises the following steps of: firstly, sending normal temperature air to a heat exchanger in a flue to obtain low-temperature combustion air; secondly, enabling the low-temperature combustion air to pass through a regenerator bed layer of a hot blast stove which just complete the air supply to obtain the high-temperature combustion air; thirdly, sending the high-temperature combustion air and the low calorific value gas to a burner of the hot blast stove to obtain a desired high flame burning temperature and a desired high top temperature, and then obtain a desired high air temperature. The method is used for supplying the air to a blast furnace, and has the advantages of energy conservation, emission reduction, and investment and occupied area saving.

Description

technical field [0001] The invention relates to a method for obtaining high wind temperature by using low-calorific-value gas and high-temperature combustion-supporting air, and relates to the technical field of thermal energy engineering; in particular, it relates to the technical field of a method for obtaining high-wind temperature by using low-calorific-value gas and high-temperature combustion-supporting air. Background technique [0002] At present, as far as the ironmaking industry is concerned, the hot air for ironmaking blast furnaces is supplied by top-fired hot blast stoves, which are composed of three top-fired hot blast stoves. In the process of cycle alternating working conditions, the so-called two burning and one sending: ①, two burning means: two top-fired hot blast stoves are in the combustion state to store heat for their own heat storage body (checker brick), and after the heat storage meets the requirements Just prepare for entering the air supply to the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B9/14
Inventor 张伯鹏李富朝李建涛陈泉锋王义平梁万盛
Owner ZHENGZHOU ANNEC IND
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