Regulation method for low-nitrogen emission of reheating coke oven

An adjustment method and a reheating technology, which are applied in the heating of coke ovens, combustible gas heating coke ovens, coke ovens, etc., can solve the problems of complex coke oven structure, time-consuming and laborious, etc., to reduce the area of ​​high temperature area and improve heating The effect of uniformity and reduction of the formation of nitrogen oxides

Active Publication Date: 2021-07-16
ACRE COKING & REFRACTORY ENG CONSULTING CORP DALIAN MCC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these technical solutions are all realized by changing the structure of the coke oven, and some coke oven structures are very complicated, and the implementation is not only time-consuming and laborious, but also has certain risks

Method used

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  • Regulation method for low-nitrogen emission of reheating coke oven
  • Regulation method for low-nitrogen emission of reheating coke oven
  • Regulation method for low-nitrogen emission of reheating coke oven

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Such as Figure 1 ~ Figure 3 As shown, it is a structural schematic diagram of a common domestic reheating coke oven heating system in which both air and gas are segmented. The reheating coke oven includes a small flue 1, a regenerator 2, The chute 3, the combustion chamber 4, the carbonization chamber 5 and the furnace roof 6, and the entrance of the small flue 1 are provided with a small flue connecting pipe 22, which can adjust the air volume and gas volume entering the regenerator. Combustion chamber 4 is made up of 34 standing fire passages 9, adopts the form of double-connected fire passages, waste gas circulation, poor coal gas and air, and 9 standing fire passages are divided into three sections for heating. The bottom of the fire passage is respectively provided with an air outlet 11 at the bottom of the fire passage and a lean gas outlet 12 at the bottom of the fire passage, and two air outlets 13 and 2 for the partition wall of the fire passage are respective...

Embodiment 2

[0062] Such as Figure 7 ~ Figure 9 As shown, it is a structural schematic diagram of a common domestic air-segmented, lean-gas non-segmented reheating coke oven heating system. The reheating coke oven includes a small flue 1 and a regenerator from bottom to top 2. The chute 3, the combustion chamber 4, the carbonization chamber 5, and the furnace roof 6. A small flue connecting pipe 22 is provided at the entrance of the small flue 1, which can adjust the amount of air and gas entering the regenerator. Combustion chamber 4 is made up of 36 vertical fire passages 9, adopts the form of double fire passage, waste gas circulation, air segmentation, lean coal gas non-segmentation, and vertical fire passage 9 is divided into three stages of heating. The bottom of the fire passage 9 is respectively provided with an air outlet 11 at the bottom of the fire passage and a lean gas outlet 12 at the bottom of the fire passage. The reheating coke oven can be heated with lean gas or rich ga...

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Abstract

The invention relates to a method for adjusting low-nitrogen emission of a reheating coke oven. The method comprises the following steps: (1) adjusting bricks are arranged according to a lean gas heating mode; (2) when rich gas is adopted for heating, the air outlets and / or lean gas outlets of one or more sections in a vertical flame path are blocked by the adjusting bricks, so the amount of combustion-supporting air entering the bottom, the middle and the upper part of the vertical flame path can be independently and quantitatively adjusted, and low-nitrogen emission during rich gas heating is realized; and (3) when lean gas is adopted for heating, the adjusting bricks used for blocking the air outlets or the lean gas outlets in the step (2) are moved away, the initial state that the adjusting bricks are arranged according to the lean gas heating mode is recovered, and low-nitrogen emission during lean gas heating is achieved. According to the invention, one or more segmented outlets of air or lean gas in the vertical flame path are opened or closed, so the reheating coke oven which conducts segmented heating can realize low-nitrogen combustion no matter lean gas heating or rich gas heating is adopted.

Description

technical field [0001] The invention relates to the technical field of coking oven coking, in particular to a method for adjusting low nitrogen emission of a reheating coke oven. Background technique [0002] With the country's emphasis on environmental protection, iron and steel joint enterprises and independent coking enterprises have higher and higher requirements for energy saving and emission reduction of coke ovens. In the existing large-scale coke ovens in my country, in order to control the combustion temperature in the vertical flue and improve the uniformity of heating in the vertical direction in the vertical flue, methods such as high and low lamp caps, exhaust gas circulation and segmental heating are adopted. The coke ovens of iron and steel complexes are mainly heated by lean gas, but they are heated by rich gas in the early stage of production or when the lean gas system is overhauled. Therefore, reheating coke ovens that can be heated by lean gas or rich gas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B21/10C10B21/16
CPCC10B21/10C10B21/16Y02P20/129
Inventor 陈伟杨俊峰韩龙赵殿辉肖长志
Owner ACRE COKING & REFRACTORY ENG CONSULTING CORP DALIAN MCC
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