908results about How to "Realize harmless treatment" patented technology

The invention relates to a centralized kitchen waste treatment method which comprises the following steps of: (A) sorting kitchen waste; (B) separating oil from water; (C) treating oil; (D) treating sewage; and (E) treating odor. Compared with a traditional kitchen waste burying method, by using the centralized kitchen waste treatment method, a great amount of soil is saved and an available methane resource is generated, kitchen waste reaches 100 percent of harmlessness, more than 95 percent of resource utilization and more than 95 percent of quantitative reduction, and the harmless treatmentof waste and the recycle of resources are truly realized.

The invention discloses a thermal desorption method for contaminated soil, which comprises the following steps of: performing thermal desorption on the contaminated soil at the temperature of between 400 and 650 DEG C; incinerating gaseous contaminant-containing flue gas which is discharged by the thermal desorption step at the temperature of between 750 and 1,200DEG C; and performing afterheat utilization and tail gas treatment on the incinerated flue gas. When the thermal desorption method is used for treating the contaminated soil, the destruction and removal efficiency for the organic contaminants in the contaminated soil is over 99 percent, the tail gas meets the emission standard, and the possible secondary pollution in the process of treating the contaminated soil is stopped, so that the effective innocent treatment is realized and the original reutilization property of the soil is maintained.

The invention provides a harmless and comprehensive utilization method of secondary aluminum dross and relates to a harmless and comprehensive utilization method of secondary aluminum dross produced in an aluminum dross treating process. The harmless and comprehensive utilization method is characterized in that slurry is prepared from the secondary aluminum dross produced in the aluminum dross treating process and water, a stirring deamination reaction is performed, and ammonia gas formed through the reaction is condensed or absorbed by water; slurry after the reaction is subjected to liquid-solid separation, separated liquid phase is subjected to evaporative crystallization, and a chlorate and fluoride salt mixture is obtained; separated solid phase is used for producing a calcium aluminate material. With adoption of the method, the aluminum dross can be treated harmlessly, useful components in the aluminum dross are recovered efficiently, the harmless secondary aluminum dross can replace high-alumina bauxite for preparing a calcium aluminate product, production cost is reduced greatly, zero-release utilization of the aluminum dross is realized, the process is simple, the operation is convenient, the cost is low, environmental protection is realized, and the method has wide applicability.

The invention provides a method for recycling and synchronous harmless treatment of gold, silver and iron in roasting-cyanidation tailings, and belongs to the technical field of metallurgical waste residue utilization. The method comprises the following steps: mixing dried roasting-cyanidation tailings with a fluxing agent and a reducing agent; carrying out roasting at 750 to 900 DEG C for 3 to 5 hours; conducting water quenching on hot roasted sand for cooling; carrying out ore grinding and flotation to remove residual carbon; leaching gold and silver with an environment-friendly gold leaching agent; and conducting magnetic separation on the leaching residue to obtain fine iron powder. Containing no highly toxic cyanide, the rejects belong to general industry solid waste. As the fluxing agent is added for magnetic roasting, not only can gold and silver coated with an iron mineral be exposed, but also the fluxing agent can perform a solid-phase reaction with a silicate mineral to generate a dissoluble silicate, and gold and silver coated with the dissoluble silicate can also be exposed after ore grinding. According to the method, gold, silver and iron in the roasting-cyanidation tailings are recycled, harmless treatment is realized synchronously, and the purpose of clean production is realized.

The method includes following steps: using manual work or dipping LCD faceplate in solvent to remove polarized light film; using cutting method or dipping faceplate in acid liquor to remove sealing epoxy resin to open up two pieces of base plate of LCD faceplate in glass; dipping faceplate in organic solvent to remove liquid crystal; after cleaning glass base plate, and dipping the base plate to acid leach liquor to remove metallized plating film so as to obtain clean glass base plate; picking up and refining indium from acid leach liquor. The invention carries out innocent treatment for worn-out LCD faceplates, and recovers resources.

The invention relates to a treatment method for electroplating sludge, especially to a method for recovering copper and nickel from electroplating sludge. The method comprises the following steps: (1) acid leaching; (2) separation of copper from nickel: a step of adding a sulfide into a leachate of acid leaching obtained in the previous step so as to obtain a copper sulphide precipitate; (3) filtration to separate copper sulphide and a precipitate mother liquor; (4) removal of impurities; (5) filtration to separate a filter residue containing iron, chromium, calcium and magnesium and mother liquor containing nickel; and (6) evaporation and crystallization of nickel sulfate: a step of adding a sodium carbonate solution while stirring the mother liquor containing nickel until a supernatant becomes clear, controlling the pH value of a solution to be 7.5 to 9.0, carrying out standing, filtering and washing, then dissolving a sediment with sulfuric acid, controlling the pH value at an end point to be 3 to 6 and carrying out evaporation and crystallization so as to obtain a nickel sulfate product. According to the invention, the recovery rate of copper is more than 90%, the recovery rate of nickel is more than 80%, and waste water produced in the method reaches an emission standard.

A treating method of waste cathode charcoal blocks is provided. The waste cathode charcoal blocks are from electrolytic tank heavy maintenance slag of an electrolytic aluminium factory. The method includes treating the electrolytic tank heavy maintenance slag to obtain powdered waste cathode charcoal blocks, subjecting the powdered waste cathode charcoal blocks to water leaching to obtain a leachate and cathode charcoal blocks after leaching, performing solid liquid separation after the leachate and a fluorine removal agent are subjected to a curing reaction, returning the filtrate to the leaching step for circulated use, and stacking filter cakes or adopting the filter cakes as a raw material for preparing calcium fluoride. The method adopts a manner of a plurality of times of leaching, thus achieving innocent treatment of the waste cathode charcoal blocks. The filtrate and the filter cakes after leachate treatment can be reused, and the cathode charcoal blocks after leaching can be adopted as fuel for producing alumina. The method overcomes a series of problems caused by stacking of a large amount of the waste cathode charcoal blocks, achieves efficient utilization of the waste cathode charcoal blocks, and is obvious in economic benefit and suitable for industrial production.

A new harmless comprehensive utilization technique for wet processing chromic slag comprises steps as follows: ball milling chromic slag to 80-200 meshes, adding water to prepare slurry, immersing the slurry in hydrochloric acid solution, regulating the pH to 5-6, performing solid-liquid separation with filter press, in the immersion liquid after separation, the hexavalent chrome is reduced to trivalent chromium, adding sodium hudroxide aqueous solution, regulating the pH to 4-6, roughly preparing chromic hydroxide, adding sulfuric acid into filtrate, regulating the pH to 5-6, removing the calcium coprecipitated with magnesium in the rest filtrate, preparing the 2-water calcium sulphate whisker, adding alkali to the filtrate after filter-pressing to regulate the pH to 9-12 to synthesize super-fine magnesium hydroxide powder; the solution after filter-pressing is concentrated to prepare sodium chloride. The main contents of extracts within the chromic slag treated by wet processing all can meet primary, secondary or even accredited national or ministerial standard. The technique can thoroughly detoxicate Cr<6+> in chromic slag and can prepare nine products, includiing chromic hydroxide, magnesium hydroxide, ammonium hydroxide, silicon dioxide, magnetic ferrous ferricoxide, 2-water calcium sulphate, corundum intermediate, sodium chloride, and tailings-chromite; and the extracts after processing chromic slag have high quality.

The invention provides a system and a method for gasification melting of household refuse and treatment of household refuse leachate. The system comprises a household refuse pretreatment system, a refuse energy recovering system and a refuse leachate concentration and flue gas treatment system, wherein the household refuse pretreatment system comprises a household refuse stock bin, a household refuse crusher, a household refuse sieving machine and a household refuse extrusion dehydrator which are sequentially connected; the refuse energy recovering system comprises a fluidized-bed gasifier, a cyclone melting furnace, a waste heat boiler and an air-supplying and oxygen-enriching system matched with the fluidized-bed gasifier, the cyclone melting furnace and the waste heat boiler; the refuse leachate concentration and flue gas treatment system comprises a leachate concentrating system, a flue gas purifying device and a wastewater treatment device. According to the system, the heat value of the refuge is increased by a pretreatment process; an oxygen-enriching gasifier and a high-temperature cyclone melting furnace technology are used as a recovering system of refuge energy; the refuge leachate is concentrated by using medium-temperature flue gas exhausted by the waste heat boiler; the concentrated leachate is sprayed into the high-temperature cyclone furnace for harmless treatment.

The invention discloses a method for harmless treatment of arsenic sulfide slag, which comprises the following steps: adding water to arsenic sulfide slag at room temperature, mixing to obtain mixture I, adding sodium sulfide to react to obtain mixture II, and then Add oxidant to carry out oxidation reaction to obtain mixture III, then add iron salt or aluminum salt for reaction to obtain mixture IV, and then add cement. The invention has the advantages of being able to effectively reduce the arsenic leaching concentration of the arsenic sulfide slag, the treated arsenic sulfide slag meets the requirements for hazardous waste landfill, simple process flow, small volume increase, strong operability, short stirring time, and low consumption.

The invention belongs to the technical field of metallurgy and environmental protection, and particularly relates to a comprehensive utilization method for aluminum oxide red mud. The comprehensive utilization method for the aluminum oxide red mud aims at solving the problem that the aluminum oxide red mud is difficult to treat and recycle effectively, the red mud is treated by adopting a vacuum thermal reduction method, carbon or aluminum serves as a reducing agent, iron oxide in the red mud is reduced into metal iron under a vacuum condition, then iron in reducing slag is separated out through magnetic separation to be used for producing reduced iron powder, combined-state sodium oxide is reduced into metallic sodium and is distilled out, and therefore, the purposes of dealkalization and alkali recovery from the red mud can be achieved; and meanwhile, other valuable substances (such as scandium, niobium, cesium) in the red mud are reduced to metallic states and form an alloy with aluminum so as to be separated from the slag with the main components being silicon oxide and aluminum oxide, and therefore the effects of harmless treatment of the aluminum oxide red mud and comprehensive recovery and utilization of the valuable elements can be achieved, and no waste gas, waste water, waste slag or other secondary pollution is generated in the treatment process.

The invention discloses a garbage incineration treatment device which belongs to the garbage harmless treatment field; the technical proposal includes that: according to the flow sequence of the flue gas generated in an incinerator body (1), a flow and flow velocity control component (3), a turbulent flow flue gas channel (4), a high pressure spraying dust removal pool (5), an active carbon absorption chamber (6), an induced draft fan (7) and a flue gas drying chamber (8) are arranged in the flue gas treatment facility; wherein, the flue gas drying chamber (8) is arranged on the upper part of the incinerator body (1) around the outer wall of the furnace body; the outlet of the flue gas drying chamber is connected with a chimney (10). Besides, the invention also discloses the corresponding treatment method adopted by the treatment device. The technical proposal is adopted to improve the efficiency of the garbage incineration; the insulation property of the furnace body is higher and the garbage incineration becomes more sufficient; the dust removal and drying effects of the flue gas are better; the finally exhausted flue gas is enabled to be purer, so as to realize the harmless treatment of the flue gas.

The invention belongs to the field of environmental protection, and particularly discloses a comprehensive recovery process for desulfurization waste liquid secondary salt in a coking plant. The comprehensive recovery process is characterized in that: the desulfurization waste liquid is decolorized, evaporated, and separated to obtain a solid mixture of ammonium thiosulfate and ammonium sulfate and a separation liquid, and the separation liquid is filtered, crystallized, washed, and dried to obtain ammonium thiocyanate finished product. The invention has a simple process and a clear process, and can simultaneously recycle three secondary salts of ammonium thiocyanate, ammonium thiosulfate and ammonium sulfate in the desulfurization waste liquid with less energy consumption. The whole process is a physical process, and no other chemicals are introduced to avoid It prevents secondary pollution and realizes the harmless treatment of wastewater.

The invention relates to a medical waste processing system based on the radio frequency identification device (RFID) technology. The medical waste processing system based on the RFID technology comprises a medical waste electronic receipt system, a collection and transportation vehicle RFID management system, a collection and transportation vehicle RFID electronic locking system, a video monitoring system, a global position system (GPS) vehicle collection and transportation route real-time tracking system, an RFID medical waste burning check system and a monitoring center visualization platform. The medical waste processing system based on the RFID technology is characterized in that medical waste processing vehicles with RFID chips are automatically distinguished by utilization of the technologies such as an RFID and a wireless fidelity (WIFI) of the internet of Things, a plurality of distinguishing devices are used for monitoring medical waste processing procedures and positioning a medical waste processing route, and whole-process electronic monitoring of medical waste processing is achieved.

The invention relates to an energy regeneration method for solid organic waste alkaline thermal hydrolysis supernate. Solid organic waste mainly comprises kitchen waste and sludge. The energy regeneration method for the solid organic waste alkaline thermal hydrolysis supernate comprises the following steps that (1) after the organic waste, water and alkali hydrolysis agents are proportioned and mixed in a proportioning and preheating tank, heating is conducted, so that the temperature of the materials in the tank is increased to 30-99 DEG C; (2) the materials in the proportioning and preheating tank are sent into a reaction kettle through a pump for the temperature rise reaction, and finally the temperature of the materials is controlled between 100 DEG C and 140 DEG C, and the reaction continues to be conducted for 90-120 minutes; (3) the materials after the hydrolysis reaction are conveyed into a flash evaporation tank for pressure relief and cooling, so that the temperature of the materials is decreased to 50-100 DEG C; (4) clarified liquid and solid are obtained after solid-liquid separation; and (5) the liquid obtained after solid-liquid separation is delivered into an anaerobic digestion system for anaerobic digestion treatment, and thus marsh gas is generated. By the adoption of the energy regeneration method for the solid organic waste alkaline thermal hydrolysis supernate, toxin removal, stabilization, minimization and energy regeneration of the organic waste can be achieved at a time.

This invention relates to a method to prepare a kind of bioorganic fertilizer and its application. The preparation method includes following steps: a) proliferation and cultivation of microorganism species; b) cultivation of microorganism species against stalk antibody; c) adsorption onto a carrier and drying into organic decomposers; d) preprocessing of organic waste; e) inoculation complex fermentation and f) continuous high-temperature fermentation and nontoxification. This invention has the advantages of advanced technique, low production cost, stable product quality and long fertility persistence and can be widely applied in the production of corns, vegetables, fruits and all kinds of economic crops. Besides, it is a green method makes considerable economic, social and environmental benefits.

The invention discloses a processing method for cephalosporin dreg. The processing method comprises the following process steps of: (A) thermal alkaline hydrolysis and separation treatment: uniformly mixing cephalosporin dreg, water and alkali, carrying out constant-temperature alkaline hydrolysis reaction, and carrying out solid-liquid separation at a certain temperature after the constant-temperature alkaline hydrolysis reaction, so as to obtain sediments to be standby; and (B) anaerobic digestion treatment: inoculating anaerobic activated sludge into an anaerobic fermentation tank, mixing the sediments obtained in the step (A) with excess sludge produced by utilizing wastewater biological treatment, injecting the mixture into the fermentation tank, carrying out constant-temperature stirring, and carrying out biogas residue discharging and feeding during fermentation. According to the processing method for the cephalosporin dreg, drug residues in the cephalosporin dreg can be completely removed, the problem that the anaerobic fermentation of single cephalosporin dreg cannot be effectively sustained is solved, and the reduction and innocent treatment to the cephalosporin dreg are realized; and biogas residues produced during the processing process can be used for preparing raw materials of organic fertilizers, the produced sewage gas can be used as clean fuels, and safe and effective disposition and resource utilization to the cephalosporin dreg are realized.

The invention discloses a coupling process method for high-concentration arsenic acidic wastewater. The coupling process method comprises the steps of (1) precipitating sulfate radical; (2) performing oxidation precipitation; (3) performing settling separation by a primary sloping panel; (4) performing oxidation and stirring; (5) performing settling separation by a secondary sloping panel; (6) coagulating an iron salt; and (7) performing air floating separation. The coupling process method has the advantages that yielding water is stable and easy to reach the standard, the agent dosage is small, the operation cost is low, the slag discharging amount is small, and arsenic slag can be cured effectively.

The invention discloses a vacuum heat pump type distilling apparatus which comprises a program controller, an evaporating tank assembly, a condensing tank assembly, a distilled water tank assembly, a vacuum buffer tank assembly, a vacuum pump, an air inlet pipe of the vacuum pump, an air exhaust hole of the vacuum pump, an electrical bar, a compressor, a high-temperature condenser, a low-temperature evaporator, a compressor outlet pipeline, a compressor inlet pipeline, a connecting pipe and a throttling valve. In the invention, first, the vacuum pump is used for pumping the device into a vacuum state so that the boiling temperature of the water is lowered and the heat pump can meet the temperature requirement; then, the low-temperature evaporating pipe of the heat pump is used for absorbing the energy of high-temperature steam to heat the water; and meanwhile, after the heat of the high-temperature steam is absorbed, the high-temperature steam is condensed into distilled water, the cooling process of the high-temperature steam can not consume any tap water, the power can be saved by more than 80%, and the water can be saved by more than 90%. In order to solve the problem that the heat source is insufficient when the heat pump is just started, the electrical bar is used for heating the water to the specified temperature in the starting process.