Control method for getting wind process for kiln hood waste heat boiler in dry cement residual heat utilization and apparatus thereof

Abstract

The invention relates to the fields of the recycle and application to electricity generation of waste gas and residual heat of a kiln head clinker cooler of a novel dry method cement production line. On the basis that at the kiln head cooler, the temperature of the cooled clinker is 600-200 DEG C of a cooling grate bed area and the discharging temperature of the cooler is ensured to meet the requirement, the invention controls and improves the temperature of hot air at the upper part of a clinker layer after heat exchange with the clinker, through utilizing first-discharging waste gas discharged to air and with temperature of 80-120 DEG C as cooling air which is corresponding to the area and used for cooling the clinker, effectively controlling the thickness of the clinker layer in the cooler and improving the temperature of the cooling air which is corresponding to the area and used for cooling the clinker. According to the temperature of hot air at the upper part of the corresponding clinker layer, the thickness of the clinker layer in the cooler and the temperature of the cooling air can be regulated in real time. The invention has the advantages of further stabilizing and improving the temperature of inlet air and steam production of residual heat boilers, stabilizing and improving generated energy of residual heat generation, and simultaneously improving the rate of multipurpose utilization of cement kiln residual heat resources.

Description

technical field [0001] The invention relates to recovery and utilization of exhaust gas waste heat of a new dry process cement production line, in particular to the field of recovering waste gas waste heat of a kiln head clinker cooler of a new dry process cement production line and using it for power generation. technical background [0002] In the existing technology of pure low-temperature waste heat power generation in new dry-process cement kilns, the heat source of the kiln head waste heat boiler mainly comes from the two coolers with the temperature of the cooled clinker of the kiln head cooler at 600°C-400°C and 400°C-200°C. Waste heat waste gas taken from the upper part of the material layer in the grate bed area. In the actual application process, affected by various factors such as clinker flow rate, material layer thickness, blast volume under the grate, clinker particle size, etc., the temperature of the exhaust gas at the upper part of the material layer often ...

AI Technical Summary

Problems solved by technology

In the actual application process, affected by various factors such as clinker flow rate, material layer thickness, blast volume under the grate, clinker particle size, etc., the temperature of the exhaust gas at the upper part of the material layer often fluctuates greatly, which seriously affects the waste heat of the kiln head. The steam output of the boiler seriously affects the stability and long-term stability of the power generation system

From the actual situation, the operating speed of the cooler and the blast volume under the grate are all operated by the operator based on experience. It is difficult to ensure the stability of the cooling effect of cement clinker under the condition of frequent fluctuations in the cement production line. Difficult to ensure the stability of the hot air temperature on the grate

At the same time, after the construction of the corresponding waste heat power generation device according to the pure low-temperature waste heat power generation technology of the existing new dry-process cement production line, there is still a large amount of low-temperature waste heat at about 100-150°C, accounting for about 20% of the total waste heat resources of the kiln head, which has not been utilized.

Images