Method for rapidly improving temperature of annular cold flue gas

Abstract

The invention relates to a method for rapidly improving the temperature of the annular cold flue gas, so that the flue gas temperature of the sintered annular cold in the short-time shutdown period ismaintained above 300 DEG c. The specific scheme is as follows, 1) before the sintering machine is stopped, the annular cold speed ratio is reduced by 6-7%, the machine speed of the sintering machineis increased by 5-7%, the thickness of the material layer of an annular cooler is improved by 30-40 mm, sintering end point positions move back 0.5 to 0. 6 windbox positions; the press-in amount of the machine head cloth is increased by 10-15 mm, after the part to be pressed is increased in amount reaches the tail of the machine tail, the structure is stopped; 2) after the sintering machine is shut down, the main suction frequency conversion number is immediately closed to 670-700 r / min, a main air draft door is closed immediately; the opening degree of the air door of the high-temperature section of the annular cooler is reduced to 40%-50%, all the air doors are opened when the air door is started again; 3 ) after being restarted, the speed ratio of the sintering machine is increased by 5%-10% before the speed ratio of the sintering machine is shut down, the temperature of the sintering large flue waste gas is controlled between 110 DEG c to 120 DEG c, the sintering main air draft door is gradually opened. According to the method for rapidly improving the temperature of the annular cold flue gas, the influence of short-time shutdown on the waste heat power generation system is relieved, and the power generation capacity of the sintering waste heat is improved.

Description

technical field [0001] The invention relates to the field of sintering, in particular to a method for rapidly raising the temperature of ring-cooled flue gas. Background technique [0002] Since the operation of waste heat recovery of sintering ring cooler (waste heat power generation project), there has been a phenomenon that after the sintering machine system shuts down for a short time (within 45 minutes), the flue gas temperature cannot meet the requirements of waste heat power generation, resulting in the disconnection of the generator and the interruption of power generation, while the power generation After the interruption, it takes at least 5 hours to resume power generation, resulting in waste of heat energy and a drop in power generation, which seriously affects heat energy recovery and increases the cost of self-generation. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for rapidly increasin...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for quickly increasing the temperature of the ring cooling flue gas, to solve the problem of the temperature drop of the ring cooler flue gas after the sintering system is shut down for a short time, and to avoid the disconnection of the sintering waste heat power generation system