Large boiler low-temperature flue gas purification waste heat drying bed
A low-temperature flue gas, large boiler technology, applied in heating to dry solid materials, hearth furnaces, drying solid materials, etc., can solve the problems of increased exhaust gas temperature, low utilization rate of flue gas waste heat, and high cost
Inactive Publication Date: 2012-04-04
张咸民 +1
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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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[0013] The working process of the large-scale boiler flue gas purification low-temperature waste heat drying bed of the present invention will be further explained below according to the accompanying drawings. The waste heat is transferred to the hopper through the flue fins, and the dried material gradually reaches the drying standard by absorbing heat and raising the temperature to evaporate water vapor. Then in the unloading area, the unloading is completed by the ring self-unloading device and enters the next process. The disc harrow installed above the frame can stir and stir the materials, prevent viscous materials from agglomerating during the drying process and expand the area of dried materials. The evaporative exhaust pipe and the subsidized cold wind form a convective flow, which not only accelerates the heat release speed of the low-temperature flue gas, but also accelerates the evaporation of material moisture. The sulfur dioxide in the flue gas is deposited in...
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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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IPC IPC(8): F26B3/24F26B21/14F26B25/00F26B25/02B01D53/06
Inventor 张咸民张会芹
Owner 张咸民
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