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.

The invention discloses a preparation method of high-purity FeCl2.4H2O. The preparation method comprises the following processes for preparing the high-purity FeCl2.4H2O: by taking hot galvanizing waste acid as a raw material, filtering, reducing, performing vacuum distillation, recycling mother liquor, and the like. According to the embodiment of the invention, the problem of influence of Zn<2+> on the FeCl2.4H2O purity and FeCl2 use scope can be solved, the comprehensive utilization rate of FeCl2 is increased and the problems of high cost, single product and secondary pollution of extraction of high purity FeCl2.4H2O from waste acid can be solved. The invention provides a new method for recycling hot galvanizing waste acid. The waste acid is subjected to simple and low-consumption process, so that the purpose of increasing the additional value of products is achieved, the environment pressure is effectively reduced and the economic benefit of the enterprise is increased.

The invention discloses application of a hollow glass bead biological membrane carrier in wastewater treatment, which includes that a hollow glass bead is added in a biological membrane reactor for inoculating active sludge, the biological membrane reactor is started to intake water and aerate so as to enable the hollow glass bead to contact with microorganisms in the biological membrane reactor fully, a biological membrane is generated on the surface of the hollow glass bead, and the biological membrane is used for perform wastewater treatment. The weight of a single hollow glass bead is less than 0.001g, grain size of the single hollow glass bead is 0.01-0.075mm, and density of the single hollow glass bead is 180-190Kg.m-3. The hollow glass bead biological membrane carrier is light in weight, small in grain size and density, stable in chemical property and high in mechanical strength, has good sealing performance, wind pressure resistance and corrosion resistance, is not easy to break and good in mobility, can form a turbulence state with the microorganisms, simultaneously can resist strong hydraulic shear action, facilitates the wastewater treatment, and accelerates forming speed of the biological membrane and starting time of the reactor.

The invention discloses a method for processing waste water containing phenol generated in the production process of metlbond resin; the method comprises the following steps: firstly the pH value of waste water is adjusted to 11.5 to 14 to enable the phenol in the waste water to exist in a phenol sodium type, and then the phenol in the waste water is separated by rectification. The content of phenol in the waste water containing phenol is from 20000 ppm to 50000 ppm, the pH equals to 4, and the COD equals to 140000ppm. The rectification technology of the waste water has stable production process, low energy consumption, compact equipment installation, simple operation and easy process control. The rectified waste water has strong biochemical performance, the difficulty of the biochemical treatment of the subsequent work procedures is lowered, and the capability of biochemical treatment is improved. Compared with the common method, the invention causes no secondary pollution. The wastewater processed by the method of the invention has the phenol removing rate of higher than 95 percent and the rectified outlet water BOD / COD equaling to 4, belongs to the easy biochemical treatment method of the waste water containing phenol, and changes the condition of the serious pollution caused by the waste water containing phenol of the metlbond resin industry.