Method and device for recycling CO in sintering and pelletizing waste gas
A technology of waste gas and pellets, applied in the combustion method, waste heat treatment, combustion type, etc., can solve the problems of easy blockage, troublesome maintenance, high investment cost, and achieve the effect of reducing heating temperature, convenient use and maintenance, and low basic investment.
Inactive Publication Date: 2021-02-02
LIUZHOU IRON & STEEL
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Problems solved by technology
[0006] The purpose of the present invention is to solve the defects of the prior art that the treatment of CO in sintering (pellet) waste gas is easy to block, maintenance is troublesome, and investment cost is high.
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[0027] The present invention is specifically described below in conjunction with accompanying drawing, as figure 1 , figure 2 As shown, a method for reusing CO in the waste gas of sintering pellets is implemented through the SCR denitrification reactor. The SCR reactor includes a GGH, a burner, and the burner is arranged in the vertical flue of the original flue gas side outlet of the GGH , the burner includes a combustion head 8, the combustion head 8 includes a bell mouth, the orientation of the bell mouth is consistent with the airflow direction in the flue, and both are vertically upward, which can prevent the flame from being fluctuated by the airflow and affect the stability of the flame combustion .
[0028] More specifically, the combustion head 8 of the burner is located in the middle and lower section of the vertical section of the flue 4 at the side outlet of the GGH raw flue gas of the SCR reactor, with 1 / 3 of the length of the flue between the side outlet of the...
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The invention discloses a method and device for recycling CO in sintering and pelletizing waste gas. The method is implemented through an SCR reactor; the SCR reactor comprises a GGH and a combustor;the combustor is arranged in a flue perpendicular to an outlet in the original flue gas side of the GGH; the combustor performs igniting and combusting in the flue; the high temperature during pipeline coal gas combustion supplementarily combusts CO in sintering and pelletizing flue gas; CO is converted into CO2, the reacted CO2 passes through the SCR reactor along with flue gas and then is discharged out; and meanwhile, a large amount of heat released by CO re-combustion is utilized, so that the fuel gas consumption required by an SCR denitration reactor in sintering and pelletizing flue gastreatment can be saved by 10-50%; the device comprises an SCR reactor; the SCR reactor comprises a GGH and a combustor; the combustor is arranged in a flue perpendicular to an outlet in the original flue gas side of the GGH; the combustor comprises a combustion head; the combustion head comprises a horn mouth; and the orientation of the horn mouth is consistent with the direction of airflow in theflue.
Description
technical field [0001] The invention relates to the technical field of waste gas treatment from a sintering pellet machine, in particular to a method and a device for reusing CO in the waste gas of a sintering pellet machine. Background technique [0002] The CO in the waste gas of the sintering (pellet) machine in the iron and steel industry is mainly generated by the combustion of coal powder and coke powder. The entry of these CO into the ambient air not only causes environmental pollution, but also causes energy waste. [0003] Some steel mills sintering (pellet) machine exhaust gas contains 2000 ~ 30000mg / Nm 3 CO, CO is a toxic gas, and high-concentration CO gas can cause acute and severe poisoning to the human body. The waste gas of the sintering (pellet) machine is discharged directly through the chimney and diffuses naturally through the atmosphere. Under some special weather conditions, the flue gas sinks Cause personal harm to surrounding people. [0004] Judging...
Claims
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IPC IPC(8): F27D17/00F23G7/07F23G5/46F23G5/50
CPCF27D17/008F23G7/07F23G5/46F23G5/50Y02A50/20
Inventor 潘世庆甘贵平陈阳甘牧原吴文升黎柳升韦晋科杨鹏吴丹伟张艾红马承胜阮志勇刘丽芳莫龙桂吴建霖卢福德韦柳婵石楚刚周茂涛莫荔萍严武辉陈贵孟尹志群韦振宁孙继兴杨明江熊军陶诚张立清钟广宁郭凌华黄靖李婷
Owner LIUZHOU IRON & STEEL