Large boiler low-temperature flue gas purification waste heat drying bed

Abstract

The invention relates to a large boiler low-temperature flue gas purification waste heat drying bed, and belongs to the technical field of boiler low-temperature flue gas waste heat deep utilization. The drying bed is characterized by comprising a framework crossbeam positioned at the middle position of an annular bed body, wherein the upper part of the framework crossbeam bears a ceramic flue; two sides of the framework crossbeam are provided with riding wheels; two ends of the framework crossbeam are connected with framework upright posts, the framework crossbeam and longitudinal and horizontal struts form unit frames, and the unit frames are connected through connecting plates to form a steel structure framework; the flue has a ceramic combination mode, and the traditional desulfurization and dedusting processes are carried out in the ceramic flue; through the corrosion resistance of ceramics, the corrosion of the dew point of the low-temperature flue gas on main parts of a boiler is avoided; and the flue gas can be well cleaned, equipment investment and operating cost are saved, and the low-temperature flue gas waste heat can be deeply utilized. The drying bed has the characteristics that: an annular self-discharging device is utilized; the drying bed is concise in structure, reasonable in design, economic in operation and convenient to maintain and saves land; and a key technology for realizing low-grade flue gas waste heat utilization and developing power station boiler flue gas waste heat integrated utilization is provided.

Description

1. Technical field [0001] The invention relates to a large-scale boiler low-temperature flue gas purification waste heat drying bed, and belongs to the technical field of boiler low-temperature flue gas deep utilization. 2. Background technology [0002] At present, there is a huge waste of industrial waste heat resources in my country, the utilization rate of waste heat in flue gas is low, and the cost is high. Due to the dew point corrosion of low-temperature flue gas, industrial boilers and power plant boilers have to raise the exhaust gas temperature above the smoke dew point. Despite the adoption of various recycling measures, the low-temperature flue gas between 40-50 degrees is still unusable. 3. Contents of the invention [0003] The present invention: the purpose is to solve the above-mentioned existing problems. In order to realize the deep utilization of low-grade flue gas waste heat, the integrated utilization technology of power plant boiler flue gas waste he...

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Problems solved by technology

[0002] At present, there is a huge waste of industrial waste heat resources in my country, the utilization rate of flue gas waste heat is low, and the cost is high. Due to the dew point corrosion of low-temperature flue gas, industrial boilers and power plant boilers have to raise the exhaust gas temperature above the smoke dew point.

Although a variety of recycling measures are adopted, the low-temperature flue gas between 40-50 degrees is still unusable

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