Water vapor recovery sludge heat pump drying device and energy-saving sludge water vapor recovery method

Abstract

The invention discloses a steam recovery sludge heat pump dryer and an energy-saving sludge steam recovery method.According to the method, first wet return air formed after a sludge drying process enters a water tank to be washed, dust in the first wet return air is removed, meanwhile, water is used for cooling the first wet return air and reducing the flow rate, second wet return air obtained after cooling is dispersed and enters an evaporator, the water is removed by means of condensation through the evaporator, and obtained dry return air is sent back to an air supply chamber; a heat exchange pipe is arranged in the water tank to recover waste heat in the water tank, the heat exchange pipe is connected with a compressor, gas continuously passes through the heat exchange pipe, and the heated gas is sent back to the air supply chamber to preheat the air in the air supply chamber.In this way, on the one hand, the dust in the return air obtained after sludge drying is effectively removed, and it is avoided that dust blockage affects the ventilation quantity; on the other hand, the water tank achieves a cooling effect and a flow rate reducing effect on the return air obtained after sludge drying, and therefore the dehumidifying effect of the condenser can be improved; the waste heat in the water tank is reused ingeniously, so that running energy consumption is reduced.

Description

technical field [0001] The invention relates to the technology in the field of sludge drying, in particular to a water vapor recovery sludge heat pump drying device and an energy-saving sludge water vapor recovery method. Background technique [0002] In the prior art, the sludge is dried using a heat pump dryer, which uses high-temperature dry air supply to apply to the sludge drying process, and the return air after the sludge drying process usually contains some dust. , Dust will often cause blockage of the bag filter, resulting in reduced ventilation of the bag filter, thus affecting the drying efficiency of the entire sludge heat pump drying system. And, because the temperature of the aforementioned return air is still high, it takes a long time for the return air to drop to the dew point, so the dehumidification effect on the return air is not ideal. In addition, the operation of the entire heat pump drying treatment system requires a lot of energy consumption, result...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, the sludge is dried using a heat pump dryer, which uses high-temperature dry air supply to apply to the sludge drying process, and the return air after the sludge drying process usually contains some dust. , Dust will often cause blockage of the bag filter, resulting in reduced ventilation of the bag filter, thereby affecting the drying efficiency of the entire sludge heat pump drying system

And, because the temperature of the aforementioned return air is still high, it takes a long time for the return air to drop to the dew point, so the dehumidification effect on the return air is not ideal

In addition, the operation of the entire heat pump drying treatment system requires a lot of energy consumption, resulting in high cost of sludge drying treatment, which is not conducive to the promotion and application of environmental protection projects

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