Waste heat recycling device with flue gas purification mechanism

Abstract

The invention relates to a waste heat recovery technology which is used for solving the problems that in the flue gas transmission process, heat loss is much, the service life of heat exchange equipment is shortened due to the influence of high temperature, more substances harmful to the environment exist in discharged smoke dust, the smoke discharging speed in a smoke discharging pipe is limited, and a catalyst is inactivated, so that harmful substances are discharged to pollute the environment. The waste heat recycling device comprises a smoke exhaust pipe, a longitudinal recycling pipe, an outer frame and a transverse recycling pipe. According to the invention, through rotation of the rotating pipe connected with the longitudinal recovery pipe and the transverse recovery pipe, each area of the outer wall of the rotating pipe can be in direct contact with discharged high-temperature flue gas, the service life is prolonged, and removed flue dust is compacted under the action of an extrusion sleeve and then discharged, so that the dust removal efficiency is improved. Nitrogen and sulfur oxides harmful to the environment in discharged smoke dust are reduced, denitration operation is carried out in sequence through the multiple catalytic beds, and the situation that the environment is polluted due to the fact that smoke discharging is blocked and a catalyst is inactivated in the smoke discharging pipe is avoided.

Description

technical field [0001] The invention relates to waste heat recovery technology, in particular to a waste heat recovery and utilization device with a flue gas purification mechanism. Background technique [0002] Waste heat refers to the limitations of history, technology, concept and other factors. Among the energy-consuming devices of industrial enterprises that have been put into operation, the original design has not been rationally utilized. The comprehensive utilization of waste heat is based on the quality of waste heat, according to The sequence of high and low temperature is used step by step, and the high-quality ones can be used in production processes or waste heat power generation. [0003] In the prior art, in order to ensure the improvement of the waste heat recovery rate, the waste heat is mostly recovered and utilized at the position where the flue gas is directly discharged. Due to the influence of smoke and dust attached to the outside of the pipe wall, th...

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Problems solved by technology

[0003] In the prior art, in order to ensure the improvement of the waste heat recovery rate, the waste heat is mostly recovered and utilized at the position where the flue gas is directly discharged. Due to the influence of smoke and dust attached to the outside of the pipe wall, the heat exchange efficiency and waste heat recovery efficiency are reduced, and one side of the waste heat recovery pipe is in direct contact with the flue gas at a higher temperature for a long time, which affects the service life of the waste heat recovery pipe; When removing the dust in the flue gas, bag dust removal and electrostatic dust removal are often used. The equipment required for bag dust removal and electrostatic dust removal takes up a lot of space, and the dust removed by the bag dust removal is in a fluffy state, which makes the fluffy dust contain More nitrogen and sulfur oxides, nitrogen and sulfur oxides are directly discharged into the external environment with the smoke, which is easy to pollute the environment; flue gas purification mostly uses catalytic reduction of nitrogen oxides in the flue gas under the action of a catalyst In this reaction process, in order to ensure that the nitrogen oxides in the flue gas are fully catalytically reduced, the reaction time is long, which limits the transmission of flue gas inside the exhaust pipe, and when the catalyst is deactivated, It is difficult for the staff to find out in time, so that the smoke discharged from the external environment will pollute the environment

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