55results about How to "There is no problem of secondary pollution" patented technology

The invention discloses a novel energy-saving elevator using a super capacitor. The novel energy-saving elevator comprises a cage, a traction device, an electric motor, and a control system; the control system comprises a direct current bus, a brake unit, an electric motor driving circuit, a charging circuit, a discharging circuit, and at least one super capacitor assembly; the charging circuit and the discharging circuit are connected with the super capacitor assembly through a direct current (DC) / DC bidirectional voltage converter; a sampling control driving module is used, and after operation, the voltage of the bus and the super capacitor are detected by using a pulse width modulation conversion control circuit, and voltage reduction charging and voltage raising discharging pulse-width modulation (PWM) control signals are output to the charging circuit and the discharging circuit; when the elevator reduces speed, ascends in an underloading way and descends in an overloading way, the electricity energy is stored by using the super capacitor assembly during electricity generation; and when the elevator runs, the super capacitor assembly release electricity energy to the motor, and by using direct current electricity energy stored on the super capacitor assembly, an emergency power supply is provided for the elevator through a DC / alternated current (AC) module.

The invention discloses an environment-friendly comprehensive treatment method for household garbage and waste oil and fat. The method comprises the following steps of: (1) sorting the household garbage, breaking the household garbage into garbage particles through a breaking machine, and conveying the garbage particles to a feeding hopper through a spiral transmitting machine; (2) carrying out the procedures of pre-heating, drying and dry distillation on the garbage particles to obtain charcoal through a sealed spiral conveying machine; (3) separating part of waste oil and fat into two parts through an oil and water separating system, and burning one part of waste oil and fat as fuel through a hot blast stove so as to perform drying and dry distillation on the garbage and convert the garbage into charcoal; and (4) treating the other part of wastewater through a biochemical wastewater treatment system, and discharging the processed wastewater reaching the standard. The comprehensive treatment method disclosed by the invention is a hazard-free, reducing and recycling technology for the household garbage, is free from pollution in processing, low in cost, good in practicability and high in operability, and has remarkable social and economic benefits.