Heat supplying device for smoke purification and waste heat recovery

Abstract

The invention discloses a heat supplying device for smoke purification and waste heat recovery. The heat supplying device comprises a direct contact type waste heat recovery device and a circulating water system and is characterized in that the direct contact type waste heat recovery device comprises a bubbler, a smoke inlet pipe, an overflow pipe, a cylinder, a bubbling section, a spraying section, a sprayer, a water inlet pipe, a demister and a smoke exhaust pipe. The high temperature smoke enters cooling water in the bubble form through the bubbler and carries out direct contact type heat and mass transfer in the bubbling section; smoke discharged from the cooling water enters the spraying section and is in direct contact with the cooling water sprayed out of the sprayer again to transfer heat and mass; the cooling water absorbing heat enters the circulating water system, and a heat medium is heated through a heat exchanger in the circulating water system so as to supply heat outwards; the purified and cooled smoke is exhausted from a chimney at the upper portion of the cylinder. Two-section type direct contact of the smoke and the cooling water is adopted in the heat supplying device to transfer heat and mass, so that the smoke is fully cooled and completely purified, and the heat supplying device is suitable for smoke purification and waste heat recovery of all gas thermal engineering equipment.

Description

technical field [0001] The invention relates to a flue gas waste heat recovery device, in particular to a flue gas purification and waste heat recovery heating supply device for gas thermal equipment. technical background [0002] With the rapid development of my country's economy, the energy consumption is increasing day by day, and the air quality is also getting worse day by day. Today, as the requirements for energy conservation, emission reduction and environmental protection continue to increase, natural gas, as a clean energy source with high calorific value, continues to increase its proportion in my country's urban energy consumption structure. At present, most coal-fired boilers in large and medium-sized cities in my country have been changed to gas-fired boilers. For most gas-fired boilers, the exhaust gas temperature is still above 150°C, even as high as 250°C. The gas-fired boiler flue gas contains about 18% water vapor (volume percentage), and there is a larg...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of the above-mentioned prior art, provide a high-efficiency flue gas purification and waste heat recovery heating device, and solve the problems of low waste heat recovery efficiency, poor flue gas purification effect and large flow resistance in existing waste heat recovery devices and other technical issues

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