37results about How to "Achieve resource recycling" patented technology

A treating method of fluorine-containing waste water is disclosed. The fluorine-containing waste water comprises F-, SO4<2-> and Al<3+>. The method includes: adjusting the pH value of the fluorine-containing waste water to be not lower than 5 so as to subject the F- to neutralization and sedimentation reactions; bringing the fluorine-containing waste water after the neutralization and sedimentation reactions and coagulant aids into contact; separating solid and liquid to obtain first sludge and a first liquid phase; bringing the obtained first liquid phase and an aluminum-containing compound capable of adsorbing the F- in the waste water into contact to perform coagulating sedimentation; separating liquid and solid to obtain second sludge and a second liquid phase; bringing the obtained second liquid phase and coagulant aids into contact; and performing liquid-solid separation to obtain third sludge and discharged treated water. The method can perform effective fluorine removal treatment for the fluorine-containing waste water having high contents of the F-, the SO4<2-> and the Al<3+>.

The invention discloses a method for processing city household garbage leachate. Aiming at the garbage leachate's characteristics of high ammonia nitrogen content and difficult biodegradation, people develop the processing method by combining and optimizing the following technologies: lime pretreatment, gas-film acid absorption, high efficient multi-grade AO biochemical treatment, and modified carbon absorption. The processing method comprises the following steps: subjecting the garbage leachate to a foam separation process so as to reduce the grease and surfactant content in the garbage leachate; adding lime into the garbage leachate so as to adjust the pH value of the garbage leachate and convert the ammonia nitrogen into a free state; subjecting the garbage leachate to processes of micro-filtration and ultrafiltration so as to eliminate macromolecular organic substances, then subjecting the garbage leachate to a gas-film acid absorption treatment so as to effectively eliminate the nitrogen ammonia with a high concentration in the garbage leachate to meet the requirements of biochemical treatment, subjecting the garbage leachate to go through an AO biochemical treatment system so as to further eliminate the pollutants such as total nitrogen, ammonia nitrogen, COD, BOD, and the like in the garbage leachate, so that after the processes mentioned above, only organic matters that are difficult to degrade and soluble are left in the garbage leachate, adopting modified carbon as an absorbent and a counter-current multi-grade absorption technology to effectively eliminate the organic matters difficult to degrade in the garbage leachate to make the garbage leachate meet the national discharging standard, and finally discharging the qualified garbage leachate.

The invention discloses a high-quality pavement petroleum asphalt material and a preparation method thereof, belonging to the pavement engineering material technical field. The petroleum asphalt material is prepared from the raw materials according to the parts by weight: 80-95 parts of main asphalt, 5-20 parts of formulated asphalt, 0.01-2 parts of macromolecular crosslinking agent and 0.001-0.25 part of heat stabilizer. The invention adopts chemical crosslinking, heat stabilizer and the combination of cutting and milling to promote the matching of the four components of asphalt to be further optimized and develop in the direction of forming stable colloid structure, improving the pavement performance of the formulated asphalt material and increase the stability of the formulated asphalt product. The invention makes full use of the vacuum residue of residual oil and heavy crude which are treated through vacuum deep extraction and increases the use value so as to reach the effect of resource recycling and environmental protection.

The invention discloses a method for recycling industrial waste salt. The method comprises the following steps: taking waste salt containing relatively high ammonium chloride and organic waste salt for compatibility; heating and pyrolyzing the compatible waste salt to remove organic matters; cooling the pyrolyzed waste salt, and adding water for dissolving to prepare a solution; filtering the solution, and evaporating to obtain a mixed salt solid; preparing a plurality of tanks of saturated sodium chloride solutions, and performing salt washing on the mixed salt to obtain an industrial productsodium chloride; and adding sulfuric acid into the replaced saturated sodium chloride solution of sodium sulfate, absorbing hydrogen chloride gas in a reaction product by water to be converted into hydrochloric acid, filtering the sodium sulfate solution, and drying to prepare industrial sodium sulfate. The waste salt used in the method mainly contains ammonium chloride waste salt and organic waste salt, so that the problems that high-salt leachate is difficult to treat and the like after the waste salt is buried can be solved, meanwhile, sodium chloride and sodium sulfate are recycled, and resource recycling is achieved.

The invention discloses a set of concrete production environmental protection equipment and a concrete production process. The set of concrete production environmental protection equipment comprises a DCS central control system and a remote monitoring system, wherein the DCS central control system controls an aggregate production line, a cement and mineral powder production line, a cement kiln sludge processing equipment, raw material processing domestic garbage equipment and concrete mixing plant equipment to produce concrete through a control signal; and the remote monitoring system is connected with and monitors the aggregate production line, the cement and mineral powder production line, the cement kiln sludge processing equipment, the raw material processing domestic garbage equipment and the concrete mixing plant equipment through optical fibers. With adoption of the set of concrete production environmental protection equipment, the concrete production process can be carried out. The set of concrete production environmental protection equipment has the advantages that no dusts, not leakage and no secondary pollution and transportation are generated due to full-automation sealing production, the energy is saved, the environment is protected, environmental pollution of atmosphere and soils is reduced, toxic and harmful substances are prevented from damaging human health through processing, and the economic benefit in virtuous circle and the value-added effect of the building material industry are reached.

The invention relates to a defluorination and dephosphorization method of PSRY molecular sieve production wastewater. The method comprises the following steps: (1) solid waste residues generated during treatment process of PSRY molecular sieve production wastewater and other molecular sieve production wastewater are mixed, and aluminum in the solid waste residues is dissolved in the form of Al<3+> in the wastewater, wherein pH value of the mixed system during the dissolution process is less than 4.5; (2) pH value of the mixed system obtained from the step (1) is adjusted to more than 6 to make Al<3+> reacts with F<-> and PO4<3-> so as to fully precipitate F<-> and PO4<3->; and (3) a coagulant aid is added into the mixed system obtained from the step (2), and solid-liquid separation is carried out on the mixed system which has undergone coagulantion enhancement, wherein dosage and dissolution conditions of the solid waste residues in the step (1) enable Al<3+> in the step (2) to fully precipitate F<-> and PO4<3->. By the method, fluorine and phosphor in the PSRY molecular sieve production wastewater can be effectively removed.

The invention discloses a method for treating leachate from waste incineration plants. The method comprises the following steps: (1) anaerobic treatment: carrying out anaerobic treatment on the leachate from the waste incineration plants by means of an upflow anaerobic sludge blanket (UASB) so as to obtain treated liquid I; (2) softening treatment: adding a softening agent into the treated liquidI, carrying out chemical softening treatment, and then filtering by using a tubular micro-filtration membrane (TMF) so as to obtain treated liquid II; (3) deamination treatment: pumping the treated liquid II into a negative pressure ammonia distillation tower, and introducing steam into the tower for carrying out deamination treatment so as to obtain treated liquid III; (4) membrane advanced treatment: cooling the treated liquid III to 35 DEG C or below, then adjusting the pH value to 6-7, and filtering by means of a disk tubular reverse osmosis (DTRO) membrane so as to obtain produced water.According to the method, the leachate from the waste incineration plants is treated by using a combined process of pretreatment, anaerobic treatment, TMF softening, deamination treatment and membraneadvanced treatment, so that ammonia nitrogen, total nitrogen and organic matters in the leachate can be effectively removed, and the produced water is enabled to meet requirement of up-to-standard discharge or to be recycled.

The invention provides a large-scale livestock breeding sewage treatment method. The large-scale livestock breeding sewage treatment method comprises the following steps of: step a. carrying out physicochemical treatment on livestock breeding sewage by adopting a chemical agent, so that soluble ammonia nitrogen and phosphorus in the livestock breeding sewage form ammonium phosphate crystals, then removing the ammonium phosphate crystals formed in the sewage and suspended organic pollutants together through flocculation; step b. carrying out biochemical treatment on the sewage treated in the step a, and further removing soluble organic pollutants in the sewage; and step c. using a part of treating water treated in the step b as flushing water for colony houses of livestock, thus realizing the cyclic utilization of sewage. The invention also provides large-scale livestock breeding sewage treatment equipment. The large-scale livestock breeding sewage treatment equipment provided by the invention can be used for preventing pollution caused by livestock sewage breeding and realizing recycle processing and cyclic utilization of breeding sewage.

The invention relates to an intelligent oil-water separator, in particular to an intelligent oil-water separator for foodservice industry. The intelligent oil-water separator comprises a main box body, wherein a liquid inlet, a drain outlet and an oil outlet are formed in the main box body; an oil-water separating cavity is formed in the main box body, and the liquid inlet is communicated with the inside of the oil-water separating cavity; an oil-separating funnel is arranged in the oil-water separating cavity, and the oil-separating funnel is located at the upper end of the oil-water separating cavity; the upper end of the oil-separating funnel is an oil inlet of the funnel and the lower end is an oil outlet of the funnel; the oil inlet of the funnel is communicated with the inside of the oil-water separating cavity, and the oil outlet of the funnel is communicated with the oil outlet through an oil outlet pipe; and a driving device is also arranged on the oil-water separator to drive the oil-separating funnel to move up and down. The oil-water separating device provided by the invention is simple in structure, small in spatial volume and low in cost, and can be directly arranged in a kitchen of a restaurant or a dinning hall.

The invention relates to the technical field of papermaking, and provides a semi-transparent paper preparation method, solving the technical problem of how to use waste paper to replace a part of pulpto prepare semi-transparent paper. The semi-transparent paper preparation method includes the steps of (1), preparing pulp from waste paper; (2), removing sand and dregs; (3), preparing pulp from wood-pulp boards and deinked pulp; (4), blending the pulp and conditioning; (5), manufacturing paper with the pulp and calendering and shaping.

The invention relates to a method for recycling silver powder ammonia prepared by hydrazine hydrate reaction. The method comprises the following steps of: obtaining a mixed solution I of silver powder and ammonia-containing mother liquor after hydrazine hydrate reaction, and heating the mixed solution I to obtain mixed solution II of ammonia gas, silver powder and the ammonia-containing mother liquor; absorbing ammonia gas for recycling the mixed solution I by a silver nitrate solution, using the silver nitrate solution which absorbs the ammonia gas in next hydrazine hydrate circular reaction, and separating silver powder from ammonia-containing mother liquor for the mixed solution II to obtain silver powder IV and ammonia-containing residual liquor III; and carrying out steam stripping on silver powder IV to remove residual ammonia on the surface of silver powder to obtain sliver powder V, absorbing stripped ammonia gas by a silver nitrate solution, and using the silver nitrate solution which absorbs the stripped ammonia gas in next hydrazine hydrate circular reaction. According to the method, an environmental protection and control technology is combined with a chemical process technology, so that cyclic utilization of ammonia is directly realized, and reclamation, reduction and hazard-free treatment of ammonia in wastewater are achieved, and therefore, the environment is protected, and resources are saved.

The invention discloses a single-membrane and double-chamber electrolytic copper and chlorine regeneration system and process for an acidic chlorine salt waste etching solution and belongs to the technical field of recycling equipment for an acidic etching solution, a hardware etching acidic waste solution and a mine acidic chlorine salt copper-containing waste solution of a printed circuit board.The system comprises an online acidic etching machine, a single-membrane and double-chamber electrolyzing device, a regenerated liquid blending device, a regenerated liquid injecting and absorbing device, a chlorine recycling device, a low-temperature water curtain absorbing device, a power wave absorbing device and a rotational flow spraying device. By adopting a process of electrolyzing copperby the single-membrane and double-chamber electrolyzing device and recycling chlorine by the chlorine recycling device for the acidic etching waste solution generated by the acidic etching machine, problems in the processes such as a substitution method, an ion member electrolytic process, a sulfuric acid distillation method and a diaphragm electrolytic process in the prior art are improved, low cost acidic chlorine salt etching waste solution regeneration and circulation can be realized truly, and targets of clean production and improvement of economical benefits of a PCB enterprise are achieved.