Waste heat recycling type deduster

Abstract

The invention provides a waste heat recycling type deduster which is used for recycling waste heat of high-temperature flue gases. The waste heatrecycling type deduster comprises a plurality of box bodies connected in sequence, high-temperature flue gas flow channels are formed in the box bodies, and a plurality of filter devices for filtering flue gases are vertically arranged in each high-temperature flue gas flow channel; water cooling devices are respectively arranged on the outer walls of the box bodies, and the water cooling devices on the outer walls of the box bodies exchange heat with high-temperature flue gases flowing in the box bodies, and heat recycling devices are respectively connected to the water cooling devices so as to recycle the heat generated after the heat is exchanged between the water cooling devices and the high-temperature flue gases. The waste heatrecycling type deduster not only can remove dust, but also can recycle heat in the high-temperature flue gases at the same time.

Description

technical field [0001] The invention relates to a dust collector, in particular to a waste heat recovery type dust collector capable of recovering high-temperature flue gas. Background technique [0002] The process of traditional high-temperature dusty flue gas purification and waste heat recovery system is generally: flue gas from the furnace → waste heat boiler → low-pressure pulse bag filter → dust removal fan → chimney. In the traditional high-temperature dusty flue gas purification and waste heat recovery system, the high-temperature filter material used in the low-pressure pulse bag filter is generally P84 high-temperature-resistant needle-punched felt filter material or high-temperature resistant filter material such as Fluomes. The filter materials are all fiber filter materials, and the maximum operating temperature cannot exceed 240°C. Long-term over-temperature operation will drastically shorten the service life of the filter bag, and the flue gas must not have s...

AI Technical Summary

Problems solved by technology

In the traditional high-temperature dusty flue gas purification and waste heat recovery system, the high-temperature filter material used in the low-pressure pulse bag filter is generally P84 high-temperature-resistant needle-punched felt filter material or high-temperature resistant filter material such as Fluomes. The filter materials are all fiber filter materials, and the maximum operating temperature cannot exceed 240°C. Long-term over-temperature operation will drastically shorten the service life of the filter bag, and the flue gas must not have sparks and unburned gas after entering the dust collector. Solid particles such as carbon particles still have a relatively high temperature, otherwise it will cause the bag to burn through, or even cause a bag burning accident. It must be installed in front of the dust collector, and the flue gas can enter the dust collector for purification after cooling down through the waste heat boiler

[0003] In the traditional high-temperature dusty flue gas purification and waste heat recovery system, the conditions of the flue gas participating in the heat exchange in the waste heat boiler are extremely poor, and the high-temperature flue gas containing a large amount of dust will have 30 to 40% of the dust while participating in the heat exchange. Deposition, on the one hand, dust deposition will cover the heat transfer surface and reduce the heat transfer efficiency; on the other hand, it is extremely difficult to clean the deposited dust

The currently used dust cleaning method mainly adopts the form of vibration. No matter what the principle of vibration is, it will not form a thorough dust cleaning effect, and high-frequency vibration will cause damage to the equipment, increase maintenance workload and maintenance costs. Reduce equipment life

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