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Reverse immersion method atmospheric pressure hot stuffy steel slag and waste heat recovery system and method

A technology of waste heat recovery system and water immersion method, which is applied in the steam generation method using heat carrier and the improvement of process efficiency, etc., can solve the problems of uneven slag effect, difficulty in collection and utilization, and high temperature of steel slag, so as to eliminate hidden dangers of explosion, The effect of reducing the amount of flue gas and increasing the heat recovery rate

Active Publication Date: 2022-07-15
河北安泰工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] 2. Tank type pressure hot stuffy
Second, the temperature of the steel slag loaded into the slag tank is too high, and the CO and H produced by the water in the water injection process 2 Combustible gases such as flammable gases are easy to gather to a certain concentration in a closed container, and the temperature reaches the ignition point of flammable gases and produces an explosion.
At the same time, the water temperature in the autoclave has a temperature difference from top to bottom, and the slag stuffing effect is uneven, especially in large-volume slag tanks.
[0016] (v) The steam generated by the slag contains a large amount of combustible gases such as hydrogen and carbon monoxide and particulate matter, which is difficult to collect and utilize

Method used

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  • Reverse immersion method atmospheric pressure hot stuffy steel slag and waste heat recovery system and method
  • Reverse immersion method atmospheric pressure hot stuffy steel slag and waste heat recovery system and method
  • Reverse immersion method atmospheric pressure hot stuffy steel slag and waste heat recovery system and method

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Embodiment 1

[0049] like Figure 1~Figure 2As shown, a reverse immersion method atmospheric hot slag and waste heat recovery system, which includes a slag slag device and a waste heat recovery device connected with the slag slag device; The water supply and drainage device at the bottom of the tank and the water-cooled dust collection hood 1 arranged above the solid slag tank; the waste heat recovery device includes a waste heat boiler 3 connected to the water-cooled dust collection hood 1 through a water-cooled flue 2, and the waste heat boiler 3 The low-temperature flue gas pipeline 4 is connected to the spray tower 5, the dehydrator 6, the wet electronic dust removal tower 7, the dust removal fan 8 and the clean gas discharge tower 9, which are connected in sequence. The dust removal fan 8 is driven by the steam turbine 10, and the waste heat The saturated steam piping 11 of the boiler 3 is connected to the steam turbine 10 . The water-cooled flue is provided with a fume collecting pum...

Embodiment 2

[0056] like image 3 As shown, utilize the system described in embodiment 1 to carry out the method for reverse immersion method atmospheric hot stuffy steel slag and waste heat recovery, and it comprises the following steps:

[0057] (a) Load the crushed steel slag above 800°C into a solid slag tank.

[0058] Under the premise that the molten steel slag forms a solid state, the higher the temperature, the better the effect of slag slag and waste heat recovery; the bottom of the solid slag tank is equipped with an anti-blocking and leak-proof water supply and drainage device, which can ensure that the cooling water enters and discharges the solid slag tank. Not blocked.

[0059] (b) Use the crane to place the solid slag tank on the workstation, connect the water supply pipe with a quick-connect hose, and use the water supply and drainage device to supply water from the bottom of the solid slag tank to the interior of the solid slag tank according to the water supply flow curv...

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Abstract

The invention relates to a reverse immersion method for atmospheric hot stuffy steel slag and a waste heat recovery system, which comprises a stuffy slag device and a residual heat recovery device connected with the stuffy slag device; A water supply and drainage device at the bottom of the tank and a water-cooled dust collecting hood arranged above the solid slag tank; the waste heat recovery device includes a waste heat boiler connected to the water-cooled dust collecting hood through a water-cooled flue, and a low-temperature flue gas pipe of the waste heat boiler The road is connected to the spray tower, the dehydrator, the wet electronic dust removal tower, the dust removal fan and the clean air discharge tower connected in sequence. The dust removal fan is driven by the steam turbine, and the saturated steam pipeline of the waste heat boiler is connected to the steam turbine. The present invention also relates to a method for slag and waste heat recovery using the above system. The invention can increase the temperature of the steel slag entering the tank, make full use of the residual heat of the hot steel slag, and at the same time effectively treat and recycle the combustible gas produced in the slag slag process, thereby achieving safety and energy saving.

Description

technical field [0001] The invention relates to a system and method for recovering hot stuffy steel slag at atmospheric pressure and waste heat by a reverse immersion method. Background technique [0002] Steel slag is a by-product in the steel smelting process, and its output is about 12% to 14% of crude steel output. At present, the annual output of steel slag in my country has reached about 150 million tons. Steel slag contains a certain amount of iron metal elements, and the recovery of metal iron has huge economic value for metallurgical enterprises. Steel slag also contains a lot of unstable substances such as free magnesium oxide (f-MgO) and free calcium oxide (f-CaO). The temperature of liquid steel slag is as high as 1400~1600℃, which has a relatively high value of waste heat recovery. [0003] Hot stuffy steel slag is the main method of steel slag pretreatment, that is, pouring water into the high-temperature steel slag in the container to pulverize the steel sla...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B3/08F22B1/18
CPCC21B3/08F22B1/18C21B2400/08C21B2400/024C21B2400/072Y02P10/20
Inventor 凌友锋王忠治霍朋亮王新凤赵刚刘雅超白占宾陈禹尹红伟陈少卿于源浩王辉
Owner 河北安泰工程技术有限公司