Adjustable cement kiln grate cooler heat fetching mouth controlling system

Abstract

The invention discloses an adjustable cement kiln grate cooler heat fetching mouth controlling system which comprises a power generating heat fetching mouth. The adjustable cement kiln grate cooler heat fetching mouth controlling system is characterized in that a heat fetching pipeline is externally arranged on a power generating heat fetching mouth. A smoke temperature detector and a pressure detector are arranged in the heat fetching pipeline and connected with a programmable logic controller (PLC) of a waste heat power station. The PLC is connected with an alarm. When the smoke temperature exceeds a set value, a first valve plate is closed and a second valve plate is opened. When the smoke temperature is lower than the set value, the first valve plate is opened and the second valve plate is closed. When the quantity of smoke which flows into a kiln waste heat boiler is larger than a set value, the first valve plate and the second valve plate are closed at the same time. When the quantity of smoke which flows into a kiln waste heat boiler is less than the set value, the first valve plate and the second valve plate are opened at the same time. The adjustable cement kiln grate cooler heat fetching mouth controlling system has the advantages that a waste heat power generating system can be flexibly adjusted to fetch air and running rate of the waste heat power generating system is improved.

Description

technical field [0001] The invention belongs to the technical field of cement kiln waste heat power generation, and in particular relates to an adjustable heat intake control system of a cement kiln grate cooler. Background technique [0002] At present, the air intake of the grate cooler of the cement kiln waste heat power generation system is mainly divided into two ways: single-port air intake and double-port air intake: the single-port air intake is to extract hot air at about 360 ° C from the front of the second section of the grate cooler for power generation ; Double-port air intake is to take out two strands of hot air at about 500 °C and about 300 °C at the front of the first section and the second section of the grate cooler, respectively, and enter different types of heat exchangers to generate steam power generation. The common points of these two air intake methods are: the determination of the position of the air intake port is mostly based on experience and ca...

AI Technical Summary

Problems solved by technology

The common points of these two air intake methods are: the determination of the position of the air intake mostly depends on experience and cannot be calculated accurately, and once the grate cooler is opened, the size and position of the air intake cannot be adjusted

Therefore, when the production load of the cement kiln fluctuates, the air intake temperature will deviate from the design value. If the air intake temperature is too high, the heat consumption of cement production will increase; if the air intake temperature is low, the waste heat power generation efficiency will decrease; and whatever the result will be Resulting in a reduction in the comprehensive benefits of the entire cement plant

[0003] It is difficult to accurately calculate the opening position selection of the existing cement kiln waste heat power generation system on the grate cooler of the cement kiln, and once the opening is fixed, it cannot be adjusted. Therefore, in actual operation, improper opening positions often cause the air temperature to deviate from the design value. And it cannot adapt to the load fluctuation of the cement production line

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