System and method for preventing and controlling temperature of ash bin in sintering process

Abstract

The invention discloses a system and method for preventing and controlling the temperature of an ash bin in a sintering process, and the system comprises: a temperature measurement galvanic couple which is disposed in the ash bin and is used for detecting the temperature T real-time in the ash bin in real time; a nitrogen pipe which is arranged in the ash bin, wherein a nitrogen adjusting valve is arranged on the nitrogen pipe; an auger conveyor which is arranged below the ash bin and is used for discharging materials in the ash bin; a water pipe, wherein the water pipe is arranged at the outlet end of the auger conveyor, and a water regulating valve and a booster water pump are arranged on the water pipe; and a PLC control module which is used for receiving the temperature T real-time, comparing the temperature T real-time with a set normal temperature value of the ash bin, and controlling the opening degrees of the nitrogen regulating valve and the water regulating valve according to a comparison result. The temperature measuring galvanic couple is used for detecting the temperature in the ash bin in real time, and when it is found that the temperature in the ash bin is abnormal, nitrogen charging, frequency modulation discharging of the auger conveyor, water fetching cooling and other means are carried out according to different control interlocking conditions, and the combustion and caking phenomena in the ash bin are reduced.

Description

technical field [0001] The invention relates to the technical field of metallurgy, and more specifically relates to a system and method for controlling the temperature of an ash bin in a sintering process. Background technique [0002] Please combine figure 1 As shown, the sintering process is to cut out various raw materials such as iron ore, limestone, dolomite, and coke powder according to the corresponding ratio, mix and granulate them, and then add them to the mixing tank 1, and the mixing tank 1 After the mixed material inside and the auxiliary base material in the auxiliary base material tank 2 are cut out, they are sent to the trolley of the sintering machine 3 through the material distribution device, and the air passes through the material surface from top to bottom under the action of the exhaust fan to complete the draft sintering After the sintered cake is crushed by the crusher 5, it enters the next ring cooler 6 for cooling. The high-temperature flue gas gen...

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Problems solved by technology

[0004] 1) When the combustion phenomenon occurs in the ash bin, it cannot be found immediately. When the combustion in the ash bin causes a large amount of agglomeration to affect the normal ash discharge operation, and the production is forced to be interrupted, it is too late;

[0005] 2) After the high-temperature material is directly discharged through the star-shaped ash discharge valve 9, it is easy to burn and ignite the conveying belt 10 and other equipment, which may cause a major fire accident in serious cases and endanger the safety of people and property;

[0006] 3) There is serious agglomeration in the ash bin of ESCS electrostatic precipitator 8, and the star-shaped ash unloading valve is suitable for conveying powdery materials. Agglomeration may easily lead to faults such as overload of the star-shaped ash unloading valve 9 or the formation of bridges and other phenomena resulting in star-shaped ash discharge valves. Ash unloading valve 9 could not discharge the agglomerated material normally, which eventually led to the accumulation of agglomerates in the ash bin, the ESCS electrostatic precipitator was completely paralyzed, and the entire production process was forced to stop

When cleaning the agglomerates in these ash bins when the machine is shut down, it takes a lot of time, manpower and material resources because the agglomerates are hard

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