A flue gas waste heat recovery device

Abstract

This application discloses a flue gas waste heat recovery device, which includes a box body with an inner cavity, a water inlet pipe, a water outlet pipe, and a heat conduction pipe. The box body is provided with a smoke exhaust hole that communicates with the boiler flue. The two ends of the heat pipe are respectively connected with the water inlet pipe and the water outlet pipe. The box is provided with an inspection port connected with the inner cavity of the box. The inspection port is used for the heat pipe to pass through. The box body is detachable. An inspection cover for covering the inspection opening is connected, and a smoke-blocking cover for covering the inspection opening is detachably connected to the heat-conducting pipe, and the smoke-blocking cover slides in the inner cavity of the box. A plurality of bent pipes are used to connect adjacent straight pipes, the inspection cover is provided with sliding holes for the straight pipes to slide, and the box body is connected with a fixing mechanism to limit the sliding of the straight pipes. The present application has the effect of being able to overhaul the heat transfer tube without shutting down the boiler.

Description

technical field [0001] The present application relates to the technical field of thermal power generation and energy saving, in particular to a flue gas waste heat recovery device. Background technique [0002] A thermal power plant is a factory that uses combustibles as fuel to produce electrical energy. In the process of thermal power generation, coal combustion produces a large amount of flue gas. By installing a flue gas waste heat recovery device at the boiler smoke port, the waste heat of the flue gas can be recovered to heat domestic water or boiler water, which improves the utilization rate of resources. [0003] related technologies, such as figure 1 A flue gas waste heat recovery device is shown, which includes a box body 1 provided with a smoke exhaust hole 11, a water inlet pipe 33, a water outlet pipe 34, and a heat transfer pipe 3 whose two ends are respectively connected to the water inlet pipe 33 and the water outlet pipe 34, The exhaust hole 11 is used to ...

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Problems solved by technology

[0004] In view of the above-mentioned related technologies, the inventor believes that there are the following defects: after the above-mentioned flue gas waste heat recovery device works for a long time, the flue gas will cause dust accumulation on the heat transfer tube, thereby affecting the thermal conductivity of the heat transfer tube

However, due to the high cost of shutting down the boiler, the boiler will only be shut down once after a long period of time, so that the heat transfer tube will need to be repaired once after a long period of time, which needs to be improved

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