Smoke waste heat exchanger and recovery device

Abstract

The invention relates to a smoke waste heat exchanger and recovery device for recovering kiln discharge smoke waste heat. The smoke waste heat exchanger comprises a shell body, a plurality of heat exchanging modules and a water supply-returning system. The shell body is arranged horizontally, openings in the two sides of the shell body are in a square cylinder shape, a plurality of vertically-arranged first sliding tracks are arranged at equal distance in the longitudinal direction on the inner wall of a side plate, and a plurality of vertically-arranged second sliding tracks are arranged at equal distance in the longitudinal direction between the middle line of the bottom plate and the middle line of the top plate. Each heat exchanging module comprises two pipe plates which are arranged vertically arranged at intervals and a module cover plate, the outer sides of the two pipe plates and groove type carbon steel are installed and welded to form water sleeves, the lower ends of the two water sleeves are sealed, the upper ends of the two water sleeves are openings, an opening of one water sleeve is a water inlet, an opening of the other water sleeve is a water outlet, a plurality of polished pipes which are arranged in parallel and are communicated with the water sleeves are connected between the two water sleeves, a plurality of sliding blocks are arranged on the outer sides of the two water sleeves at equal distance respectively, the heat exchanging modules are connected between the first sliding track and the second siding track collinear with the first sliding track through the sliding blocks on the two sides of the heat exchanging modules, water inlets of the heat exchanging modules are close to one side of the first sliding track, and water outlets of the heat exchanging modules are close to one side of the second sliding track.

Description

technical field [0001] The invention relates to a heat recovery device, in particular to a flue gas waste heat heat exchanger and a recovery device for recovering waste heat from exhaust gas of a kiln. Background technique [0002] Energy and environmental issues are important issues restricting social development and progress. Limited by the economic and technical level, my country's energy utilization rate is low. Coal, oil, natural gas and other energy sources are mainly consumed in the kilns of industrial enterprises. However, the exhaust gas temperature of industrial kilns is high, and a large amount of waste heat taken away by the flue gas cannot be effectively utilized. This part of waste heat is as high as 30-30% of the fuel consumption of the kiln itself. 60%, these heat energy are discharged into the atmosphere without utilization, which not only causes a great waste of heat, but also causes the temperature of the surrounding environment to become higher, forming ...

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Problems solved by technology

[0003] There are the following problems in the actual application of waste heat recovery from industrial kiln exhaust: (1) It is difficult to make deep use of the waste heat of flue gas. It cannot be used in depth; some flue gas waste heat exchangers use enamel or fluoroplastic materials as heat exchanger materials in order to enhance their corrosion resistance. (2) The smoke exhaust from industrial brick kilns contains a certain amount of dust, which leads to dust accumulation or blockage of the flue gas heat exchanger, which affects the heat exchange effect, especially the smoke dust in some brick kiln exhaust is relatively viscous, such as coal gangue sintered bricks Brick kiln smoke exhaust, the installation of dust removal device can not achieve a good dust removal effect, and cause heat loss; (3) The flue gas heat exchanger is inconvenient to repair and maintain, one place is corroded or leaked, the whole heat exchanger needs to be replaced, the cost is high and causes Flue gas waste heat recovery stops running, affecting heating

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