47results about How to "No secondary waste" patented technology

The invention relates to the technical field of turning, in particular to a dry cutting method for dry ice cooling. The dry cutting method is characterized in that dry ice is smashed into powder, the powder and compressed air are mixed, and the powder is sprayed on a cutting machining portion of a cutting tool at the same time in the machining process. According to the dry cutting method, the problems of waste of cutting liquid and environmental pollution caused by the cutting liquid in the existing turning process are solved, the temperature of a cutting area is obviously reduced, precision of a machining surface is improved, the service life of a tool is prolonged, and economic benefits in the cutting machining process are improved.

The invention discloses a underground oil tank lining structure of a gas station and a construction method, and solves the problem of influence on environmental protection by the corrosion leakage of a traditional underground oil steel tank. The structure comprises a double-layer lining structure design; according to the load borne by an oil tank, the stress strength of the double-layer lining structure independent from the traditional underground oil steel tank is calculated, and the thicknesses of an outer layer, a middle gap layer and an inner-layer glass fiber reinforced composite material are determined; the dry ice derusting cleaning and the resin bottom brushing are performed on the inner surface of the oil tank; the outer layer, the middle gap layer and the inner-layer glass fiber reinforced composite material are constructed in sequence; photocuring unsaturated resins and a photocuring agent are uniformly mixed according to 100: (0.2-0.6); a ultraviolet curing lamp is used for curing; and anti-thunder and anti-static grouding leakage detecting signal outgoing lines are leaded out from an inlet hole of the oil tank by the middle gap layer. The structure has such advantages as no need of field excavation, short construction period and low comprehensive cost; and the improved oil tank has complete double-layer structure to accord with national standards.

The invention provides a method for recycling uranium in uranium-contained waste water. The method is characterized by recycling and enriching the uranium in the waste water through the steps of ammonia removal of the waste water as well as pretreatment of organisms, uranium adsorption by chromatographic columns, scouring by acid solution and deposition. The method is high in recycling efficiency, low in cost, free from producing secondary waste liquid, compact in technological flow, applicable to the treatment of different uranium-contained waste liquid and high in practicability.

The invention relates to a urine sample detection and post-detection treatment system which comprises a urine detection system and a post-detection treatment system, the urine detection system comprises test strip sorting equipment, sample pretreatment equipment and urine sample detection equipment which are connected in sequence; the after-test treatment system comprises a liquid waste treatment system and a solid waste treatment system, the liquid waste treatment system comprises urine sample after-test treatment equipment, and the solid waste treatment system comprises test strip after-test treatment equipment and test tube after-test treatment equipment; the automatic urine monitoring system and the after-detection treatment system are organically combined together, so that various solid and liquid wastes generated in urine detection can be treated in time while urine sample detection can be efficiently treated in batches, and the leakage risk caused by untimely treatment or improper treatment of harmful substances is avoided; and the detection environment and detection personnel are protected.

The invention relates to the field of electrochromic materials, in particular to a method for preparing a novel electrochromic double-layer fabric. The polyaniline / polyvinyl alcohol electrochromic fiber is made by spinning method; then the polyaniline / polyvinyl alcohol electrochromic fiber and the conductive fiber are woven into an electrochromic double-layer fabric, in which the surface layer is polyaniline / polyethylene Alcohol electrochromic layer, the inner layer is a conductive base cloth; finally, the electrochromic double-layer fabric is pretreated, and then the polyaniline / polyvinyl alcohol emulsion is evenly applied to the surface of the conductive base cloth layer of the double-layer fabric, and dried ; Continue to apply polyaniline / polyvinyl alcohol emulsion on the surface of the conductive base cloth layer, seal and dry. The preparation method provided by the invention has strong operability and simple process, and the reversible color change and color change sensitivity of the double-layer fabric are high, the chemical stability is good, the softness is good, and the conductivity is high.

Disclosed is a comprehensive recycling method for non-ferrous metal metallurgy acidic wastewater and zinc-containing residues. The zinc-containing residues generated in the zinc smelting production process serve as an acidic wastewater neutralizer. Liquid obtained after neutralization is subjected to fluorine and chlorine removal and concentrated to meet the requirements for a zinc sulfate solution of a zinc system, and then directly enters the electrolytic zinc system. Valuable metal such as arsenic, cadmium and copper in the acidic wastewater is recycled through an impurity purification procedure of the zinc system. The zinc-containing residues are subjected to a neutralization step to be recycled and fed into a lead extraction procedure after being enriched with lead, silver and other metal. The filter residues with fluorine and chlorine removed are regenerated with a sodium hydroxide solution, the residues obtained after regeneration can be used for the fluorine and chlorine removal procedure repeatedly, and sodium fluoride, sodium chloride and sodium hydroxide in the liquid obtained after regeneration are separated and recycled through efficient evaporative crystallization. The comprehensive recycling method for non-ferrous metal metallurgy acidic wastewater and zinc-containing residues is based on an existing zinc hydrometallurgy system, the balance of original materials in the system is maintained, and an additional heavy metal impurity purification procedure is not added. The comprehensive recycling method for non-ferrous metal metallurgy acidic wastewater and zinc-containing residues is short in process, low in cost, high in valuable metal recycling rate, free of discharging of secondary waste residues and waste water and good in comprehensive economical benefit.

The invention discloses a manganese slag and calcium chloride waste slag recycling treatment method. The manganese slag and calcium chloride waste slag are roasted in two stages to realize the synergistic recycling method. Calcium chloride, silicon dioxide and water vapor in the air are utilized. The reaction characteristics of calcium silicate and hydrogen chloride are formed at high temperature. The manganese slag containing the low-valent manganese phase formed by reduction roasting is mixed with the above materials to carry out high-temperature chlorination roasting, and the roasted product is separated by water leaching to obtain manganese chloride, and obtain The water leaching residue composed of calcium silicate, calcium sulfate and silica mixture realizes the synergistic utilization of manganese residue and calcium chloride waste residue, improves the resource value of the above solid waste, has high economic benefits, and reduces the For the environmental pollution caused by the separate treatment of the corresponding solid waste, the entire treatment process is simple and easy to implement, and the energy consumption is low, which can be widely used in the electrolytic manganese industry.

The invention discloses an efficient biochemical nitrogen and phosphorus removal method for waste water. Ammonia nitrogen and phosphorus in waste water are efficiently removed by combining a modified A2 / O biological nitrogen and phosphorus removal technology and a chemical method, namely, zeolite adsorbing ammonia nitrogen method; the denitrification liquid flowing out from an anoxic denitrification tank enters an aerobic nitration tank to form internal circulation; the residual denitrification liquid directly enters a sedimentation tank for solid-liquid separation; phosphorus-accumulating bacteria directly flows back to an anaerobic tank from the sludge of a sedimentation tank, and then enters the anoxic nitration tank. Ion adsorption and biological regeneration treatment are combined; water outlet total nitrogen is less than or equal to 5 mg / L; the removal ratio of total nitrogen and total phosphorus is more than 90%; requirements that water outlet total nitrogen in Taihu basin chemical engineering zone is superior to the primary standard, namely, the A standard, of the urban sewage treatment plant pollutant discharge standard (GB18918-2002) are met stably.

The invention provides an electroplating product separation device. The device comprises a material cylinder, a heating mechanism, an extruding mechanism, a temperature sensor and a control unit; a feeding port and a discharging port are formed in the material cylinder, and the feeding port and the discharging port are oppositely arranged; the heating mechanism, the extruding mechanism and the temperature sensor are connected to the control unit correspondingly, the heating mechanism is arranged on the cylinder wall of the material cylinder, and the heating mechanism is used for heating materials to be separated in the material cylinder; the extruding mechanism is arranged at one end of the feeding port of the material cylinder, and the extruding mechanism is used for applying pressure tothe melted material to be separated and extruding melt from the discharging port; and the temperature sensor is arranged in the material cylinder, the control unit is used for receiving a signal of the temperature sensor, and the heating temperature of the heating mechanism and the movement of the extruding mechanism are controlled. According to the electroplating product separation device, plastic is recycled by adopting a mechanical method, so that the performance of the recycled plastic is improved, and secondary waste is not generated.

The invention discloses a method for producing multielement nitro-compound fertilizer. Wet-process phosphoric acid concentrated slag, chemical slag and extracted residual acid are mixed with potassium sulphate and microelements, nitric acid is then added for treatment, and the mixture is granulated and dried after the ammonia neutral reaction, so that the multielement nitro-compound fertilizer is produced. The multielement nitro-compound fertilizer has the characteristics of rich nutritional ingredients, easiness in absorption by plants, low cost, simplicity in technology, no generated waste and the like.