Direct reduction iron shaft furnace raw material tower harmful gas discharging and diffusing method

A technology of harmful gas and raw material tower, applied in shaft furnaces, furnaces, furnace types, etc., can solve problems such as fire, explosion, operator personal injury, etc., and achieve the effect of reducing work energy consumption, ensuring personal safety, and high degree of automation

Active Publication Date: 2017-12-01
ACRE COKING & REFRACTORY ENG CONSULTING CORP DALIAN MCC
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AI Technical Summary

Problems solved by technology

Considering that CO is a highly toxic gas, if the toxic gas accumulated on the top of the furnace enters the top raw material tower through the charging chute and escapes from the top feed port, it may cause personal injury to the on-site operators at the top of the raw material tower , and even cause explosions, fires and other accidents

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  • Direct reduction iron shaft furnace raw material tower harmful gas discharging and diffusing method
  • Direct reduction iron shaft furnace raw material tower harmful gas discharging and diffusing method

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Embodiment Construction

[0017] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0018] Such as figure 1 , figure 2 Shown, a kind of direct reduction iron shaft furnace raw material tower harmful gas release method described in the present invention comprises the following steps:

[0019] 1) When the direct reduction iron shaft furnace is in normal production, the CO gas detector 7 is used to detect the CO gas concentration inside the raw material tower 4, and the gas in the raw material tower 4 and the distribution device 5 at the top of the raw material tower is released through the harmful gas release pipe 2, which is harmful A variable-speed axial flow fan 1 is installed at the gas outlet of the upper part of the gas release pipeline 2, and the lower part is respectively connected to the ventilation hood 6 in the raw material tower 4 and on the top distribution device 5;

[0020] 2) When the monitored CO gas concentrati...

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Abstract

The invention relates to a direct reduction iron shaft furnace raw material tower harmful gas discharging and diffusing method. When a CO gas detector detects that the CO gas concentration in a raw material tower is higher than a warning concentration, an audible warning device is started and simultaneously sends a warning signal to a control system; the control system controls a variable speed axial flow fan to switch from low-speed operation to high-speed operation, an electrically operated valve connected into a harmful gas discharging and diffusing pipeline in the raw material tower is changed from a closed state during normal working to a full open state, and an electrically operated valve connected into a harmful gas discharging and diffusing pipeline of a tower top material distribution device is changed from a full open state during normal working to a closed state; and harmful gas in the raw material tower is led to the harmful gas discharging and diffusing pipelines to be discharged and diffused. On the premise that the normal operation of a coal-based vertical retort and the raw material tower is not influenced, the harmful gas plunged into the raw material tower can be discharged and diffused through the high-altitude discharging and diffusing pipelines, personal safety of site operators at the top of the raw material tower is ensured, and the accidents such as explosions and fires are avoided.

Description

technical field [0001] The invention relates to the technical field of coal-based direct reduced iron production, in particular to a method for releasing harmful gas from a raw material tower of a direct reduced iron shaft furnace. Background technique [0002] In the production of direct reduced iron by coal-based vertical furnace, after the reduction reaction in the furnace, the tail gas discharged from the top gas collection system of the vertical furnace contains a large amount of CO. Considering that CO is a highly toxic gas, if the toxic gas accumulated on the top of the furnace enters the top raw material tower through the charging chute and escapes from the top feed port, it may cause personal injury to the on-site operators at the top of the raw material tower , and even cause explosions, fires and other accidents. Contents of the invention [0003] The invention provides a method for releasing harmful gas from the raw material tower of a direct reduction iron sh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B13/02
CPCC21B13/02
Inventor 范程李振国杨俊峰袁朝晖杜光晨郑卫军
Owner ACRE COKING & REFRACTORY ENG CONSULTING CORP DALIAN MCC
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