31results about How to "Reduce evaporation efficiency" patented technology

Disclosed is a method for control of dosage of a reducing agent into an exhaust stream, which includes: determining at least one sensor signal SNOx from at least one nitrogen oxides NOx sensor arranged downstream of at least one of the one or more reduction catalysts as at least one sensor correction value SNOx_corr, respectively, if: 1) the engine rotates without fuel supply; 2) an exhaust mass flow M′exh is greater than an exhaust mass flow threshold M′exh_th; M′exh>M′exh_th; and 3) the sensor signal SNOx has had a value smaller than a sensor signal threshold SNOx_th; SNOx<SNOx_th; during at least a predetermined time period Tcon; determining at least one adjusted sensor signal SNOx_adj based on the at least one sensor signal SNOx and the at least one sensor correction value SNOx_corr, respectively; and controlling the dosage of the reducing agent based on the at least one adjusted sensor signal SNOx_adj.

The invention discloses a humidification and dehumidification type water purification device for evaporation enhancement of a fluidized bed. The humidification and dehumidification type water purification device comprises a condensation chamber, a condenser, an evaporation chamber, an upper partition board, a lower partition board, a spraying device, a heating device and a drive device, wherein an evaporation cavity is limited in the evaporation chamber, a second gas inlet, a second gas outlet and a sewage outlet are formed in the evaporation chamber, and the second gas outlet is communicated with a first gas inlet; the upper partition board and the lower partition board are arranged in the evaporation cavity in a spaced mode so as to divide the evaporation cavity into an upper cavity, a middle cavity and a lower cavity, suspended solid particles are arranged in the middle cavity, the second gas inlet is communicated with the lower cavity, and the second gas outlet is communicated with the upper cavity. The spraying device is provided with a spraying nozzle in the upper cavity. The heating device is connected between the spraying device and a water outlet pipe. The drive device is connected between a first gas outlet and the second gas inlet. By means of the humidification and dehumidification type water purification device, water purification efficiency can be improved, the structure is simple, and cost is low.

The invention discloses a high-efficiency heat exchanger for a freon low-temperature unit. The freon low-temperature unit comprises a compressor. The high-efficiency heat exchanger for the freon low-temperature unit comprises a gas-liquid separation device, an evaporator, a gas pipe and a liquid pipe, wherein the gas-liquid separation device is arranged above the evaporator, and on one side of the gas-liquid separation device, the upper end of the liquid pipe is communicated with the gas-liquid separation device and the lower end of the liquid pipe is communicated with an inlet of the evaporator; on the other side of the gas-liquid separation device, the upper end of the gas pipe is communicated with the gas-liquid separation device and the lower end of the gas pipe is communicated with an outlet of the evaporator. After optimization, potential difference determined by the height difference between the gas-liquid separation device and the evaporator is bigger than the flowing resistance of a refrigerant evaporation loop; the gas-liquid separation device comprises a liquid level meter and an oil return device; one end of the oil return device stretches to a position below the liquid level of the gas-liquid separation device and the other end of the oil return device is connected with the compressor. The high-efficiency heat exchanger for the freon low-temperature unit has the advantages that the consumption is lower, the heat exchange efficiency is high and the refrigerating capacity can be improved.