Zero-pressure-level drifting dynamic control sealing system for annular cooler or belt cooler

Abstract

The invention discloses a zero-pressure-level drifting dynamic control sealing system for an annular cooler or a belt cooler. The system comprises zero-pressure balance sealing devices, a pressure monitoring control device, electric adjusting air doors, a hot air pipeline, a high-temperature pressure balancing fan and hot air inlet valves. The zero-pressure balance sealing devices and the pressure monitoring control device are arranged in an air leakage area. The hot air inlet valves are connected with an outlet of a waste heat boiler circulating fan or connected with a waste gas outlet of a low-temperature section and connected with the high-temperature pressure balancing fan through the hot air pipeline. The high-temperature pressure balancing fan is connected with the n zero-pressure balance sealing devices through the electric adjusting air doors. The system is used for achieving effective sealing between a smoke hood of the annular cooler or the belt cooler and a trolley, and the inner side and the outer side of the smoke hood of the annular cooler or the smoke hood of the belt cooler can be sealed without the pressure differential, namely, complete sealing can be achieved. The utilizing smoke waste heat utilization quality can be improved, accordingly, the power generation amount is increased, and stable and efficient operation of a sintering annular cooler waste heat power generation system is guaranteed.

Description

technical field [0001] The invention relates to the sealing technology of an annular cooler or a belt cooler, in particular to a sealing system for dynamically controlling the zero-pressure surface drift of an annular cooler or a belt cooler. Background technique [0002] In the process of iron and steel production, the utilization of sintering waste heat has been widely promoted. The most critical core issue of sintering waste heat power generation is whether the waste heat of ring cooler or belt cooler can be collected and utilized. The key technology of high temperature flue gas collection is Taiwan Car and hood sealing technology. According to the requirements of the production process and it is not a finishing equipment, there is movement and smoke between the upper part of the trolley and the fume hood during the operation of the ring cooler or belt cooler. Due to the thermal deformation of the hood and other problems, the dynamic sealing between the hood and the trol...

AI Technical Summary

Problems solved by technology

According to the requirements of the production process and it is not a finishing equipment, there is movement and smoke between the upper part of the trolley and the fume hood during the operation of the ring cooler or belt cooler. Due to the thermal deformation of the hood and other problems, the dynamic sealing between the hood and the trolley has become a technical problem. Due to the large gap between the hood and the trolley, a large amount of cold air from the outside leaks in, resulting in a decrease in the temperature of the flue gas and reducing waste heat. The steam quality of the boiler affects the entire power generation system. Similarly, high-temperature flue gas leaks from the gap between the hood and the trolley, which will also cause heat loss and affect power generation.

At present, high-temperature rubber seals, flexible seals and water seals are mostly used at home and abroad. The main disadvantage of using high-temperature rubber seals is that high-temperature rubber works at a temperature of about 400°C for a long time. sealing effect

The disadvantage of using flexible seals is that there is a pressure difference between the inside and outside of the hood of the ring cooler or the refrigerated machine, and the pressure inside the hood is unstable, which makes the flexible seal unable to fit on the outer surface of the trolley, resulting in a tight seal. The effect becomes worse

The cost of water sealing is very high, and the water tank will be seriously silted during operation, so the current technology has not been promoted

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