1results about How to "Reduce outside temperature" patented technology

This invention provides a heat exchange device for waste heat utilization and cold-end corrosion prevention, comprising an air inlet box, a heat exchange box, a negative pressure device, an air outlet main pipe, a hot air return pipe, and several heat exchange units. The heat exchange box has a waste heat channel. Each heat exchange unit has two ends connected to the air inlet box and the input end of the negative pressure device, respectively, and each heat exchange unit extends through the waste heat channel. The negative pressure device is connected to the air outlet main pipe. The air outlet main pipe is also connected to one end of the hot air return pipe. The other end of the hot air return pipe extends into the waste heat channel, then extends out from the waste heat channel and connects to the air inlet box, thereby returning a portion of the high-temperature air after heat exchange to the air inlet box. This heat exchange device can increase the air temperature drawn into the heat exchange units, preventing the formation of a corrosive ash layer at the cold end of the heat exchange units due to excessively low temperatures, completely solving the technical problem of corrosive ash accumulation inside the device, extending the service life of the heat exchange device, and saving maintenance and repair costs.