304results about How to "Solve the way out" patented technology

The invention relates to a method for synthesizing ultrafine calcium carbonate by utilizing carbide slag. The method comprises the following steps of: (1) dissolving carbide slag: uniformly mixing carbide slag with water in a ratio of (1:6)-(1:20) to ensure that the carbide slag is fully dissolved into a turbid liquid, wherein the water content of the carbide slag is 20-45%; (2) carrying out impregnation reaction: adding ammonium chloride into the turbid liquid of the carbide slag for uniformly mixing, wherein the mass ratio of carbide slag to ammonium chloride is (1:0.7)-(1:2.5), after the impregnation reaction is finished, filtering and removing the slag to obtain a clear calcium chloride solution; and (3) carrying out carbonization reaction: adding a crystal form control agent into a calcium chloride solution for fully dissolving, introducing CO2 into the solution to carry out carbonization reaction till the pH (potential of Hydrogen) value of the reaction solution is less than or equal to 7 to obtain ultrafine calcium carbonate slurry, wherein the crystal form control agent is one or more than two mixtures of sulfate, chloride, citrate, sodium dodecyl benzene sulfonate, pyrophosphate, oleic acid, ammonium citrate, N-methyl pyrrolidone and maleic acid.

The invention relates to a process for rare-earth smelting resource reclamation and cyclic production. The process has the main characteristic of comprehensively and systematically solving the problems of environmental protection and industrial promotion of the whole rare-earth industrial chain by adopting innovative integrated technical means. The process mainly comprises administration and comprehensive utilization of waste gas, waste water and waste slag, revolution of a rare-earth smelting process, and reclamation and repeated utilization of various important resources such as sulfur, fluorine, ammonium, thorium, phosphorus, calcium and the like so as to achieve smokeless and harmless treatment of the waste gas, full utilization of the resources and zero discharge of industrial waste water and fulfill the final goal of cyclic production. The process radically solves the maximum environment-friendly bottleneck problem in a sustainable development process of the Baotou rare-earth industry from resource advantage to industrial advantage, in particular the historical key environment-friendly technical problem, reduces energy consumption of a large amount of resources and pollutiondischarge, greatly reduces the production cost, upgrades the rare-earth industry, and extends the larger industrial chain at the same time.

A process for extracting edible fibres from kelp includes such steps as washing, drying and pulverizing raw kelp, enzymolyzing, treating with hydrochloric acid, extracting by sodium carbonate, filter, neutralizing the filtrate, adding calcium chloride to obtain gel, treating the dregs with sodium hydroxide and hdyrochloric acid, mixing the said gel with the treated dregs, bleaching with sodium hypochlorite, activating, dewatering, baking and pulverizing.

The invention discloses a sludge-based desulfurizer and a preparation method thereof. A sludge agent consists of 60 to 80 percent of active ingredient, 12 to 20 percent of binder and 8 to 20 percent of pore expanding agent. The preparation method comprises the following steps of: preparing activated sludge particles from sludge particles and an active agent in a mass ratio; performing thermal treatment on the activated sludge particles, cooling the activated sludge particles subjected to thermal treatment in nitrogen and treating the cooled activated sludge particles to obtain sludge active carbon; mixing the sludge active carbon, blast furnace iron slag, red mud, quicklime and copper ash to obtain the active ingredient; and mixing the active ingredient, the binder and the pore expanding agent, grinding the mixture, adding deionized water into the ground mixture, performing extrusion molding on the mixture, drying the molded mixture and baking the dried mixture to obtain the sludge-based desulfurizer. The sludge-based desulfurizer of the invention has the advantages of high degree of purification, high sulfur dioxide adsorption capacity, simple preparation and low cost.

The invention belongs to the field of antimony smelting arsenic alkali residue treatment and particularly discloses a wet-method recycling and harmless treatment process for antimony smelting arsenicalkali residue. The process adopts a whole-wet-method treatment process and mainly comprises the eight working procedures of breaking, dissolving for leaching, oxidation for antimony outlet, purification for impurity removing, transition for crystallizing, reduction for arsenic sinking, evaporative crystallization and secondary residue harmless treatment. Recycling and harmless treatment of the arsenic alkali residue, zero emission of waste residue and waste water and up-to-standard discharge of exhaust gas are thoroughly achieved, the long-term plagued arsenic alkali residue environmental pollution problem in the antimony smelting industry in China is thoroughly solved, and the environmental risk caused by stacking the arsenic alkali residue is eliminated; and meanwhile, separation, enrichment and effective recovering of valuable elements are achieved.

The present invention relates to propylene producing catalytically cracking process, and is especially propylene producing process with catalytically cracking aluminum silicophosphate. In fixed bed or fluidized bed reactor and at the conditions of temperature 350-550 deg.c, pressure 0.1-0.3 MPa and space velocity 0.1-300 /hr, dry gas, C4 component and other material are cracked in catalyst containing aluminum silicophosphate molecular sieve SAPO-34. The output hydrocarbon mixture is separated to obtain destination product propylene before the other components are returned to the reactor for circular use. The process of the present invention has low reaction temperature, pressure near normal pressure, simple technological process and high propylene selectivity. The present invention can utilizes dry gas and C4 component effectively.

The invention relates to a refining process for lepidolite in tantalum-niobium ore waste rocks. A combined method with magnetic separation, high gradient magnetic separation, dense medium separation and flotation is adopted. The flotation adopts the process of rough flotation, dual fine flotations and sweeping. The process for refining the lepidolite from the granite-type tantalum-niobium ore waste rocks is provided. The tantalum-niobium ore waste rocks are crushed, screened, ground and subjected to high-frequency screening, spiral grading, permanent magnet magnetic separation for iron removal, high gradient magnetic separation, dense medium separation and flotation, so that lepidolite concentrates are obtained. By means of the method, the lepidolite concentrates are separated from the tantalum-niobium ore waste rocks. The lepidolite concentrates contain at least 4.5% of Li2O, at least 8.0% of K2O and Na2O and at most 0.10% of TiO2 and Fe2O3, the recovery rate of the lepidolite concentrates is larger than 80%, the qualities of the lepidolite concentrates meet the requirement of national standards, and the recovery rate of the lepidolite concentrates exceeds the industry level.

The invention provides a method for treating specific pollutants through a high-temperature melting technology. The specific pollutants comprise electroplating sludge, sludge containing metal and/or incineration disposal residues. The method comprises the steps that pretreatment is carried out, wherein the specific pollutants are pretreated, the water content of the specific pollutants is reduced to be 10 wt% or lower, and dry specific pollutant materials are obtained; burdening, blending and granulating are carried out, wherein regulating components are added as needed, mixed and granulated, and a granulated mixture is obtained; melting is carried out, wherein the granulated mixture is melted at the melting temperature ranging from 1,200 DEG C to 1,800 DEG C; and products are obtained, wherein the melted metal is settled on the lower layer and is discharged to obtain a metal alloy, and slag and a small part of metal float above the melted metal and are discharged to obtain glassy-state slag. After the specific pollutants are treated through the method, harmless and pollution-free resource materials can be obtained, and the method can be used for resource recycling, and is good in economic benefit and beneficial to commercial popularization.

This invention relates to a method for solidification treatment of sludge discharged from urban sewage treatment plant. The method utilizes solidification and stabilization techniques to treat sludge discharged from urban sewage treatment plant, and improve its landfill physicochemical properties, thus can solve the problems related to sludge landfill. The method adopts cement as the solidification agent, and one or more of lime, aluminum salt, aluminum oxide and cinder as the coagulant aid. The method comprises: adding 3-8% solidification agent and 1-8% coagulant aid into sludge, mechanically stirring uniformly, spreading onto a landfill site, covering with a waterproof film, dry-maintaining for 3-15 days, and performing following landfill. The method has such advantages as low cost, easy operation and good effect. The treated sludge has such advantages as high compressive strength, high soaking resistance and low leaching toxicity.

The invention discloses a straw gypsum lightweight plate, which comprises the following materials in part by weight: 90 to 100 parts of calcined gypsum, 20 to 40 parts of pulverized straw, 0.2 to 0.4 part of redispersible powder, 0.5 to 0.7 part of gypsum retarder, 0.2 to 0.4 part of polyvinyl alcohol (PVA) powder, 5 to 15 parts of white cement and 0.1 to 0.2 part of defoaming agent. The invention also discloses a method for preparing the straw gypsum lightweight plate, which comprises the following steps: firstly, pulverizing and putting straw in a reaction kettle for pretreatment; secondly, performing enzymolysis on the straw by adopting cellulose and centrifugalizing the straw to remove moisture: and thirdly, uniformly mixing in a stirring machine in a proportion of the raw material and water, paving mixture in a paving machine into a plate blank, performing fastening and cold compression on the plate blank to form the plate, and performing subsequent treatment to obtain the straw gypsum lightweight plate. The straw gypsum lightweight plate prepared by the method has the advantages of light weight, fireproofing, waterproofing, good sound isolation effect and good durability, is particularly suitable for an inner wall partition, a non-bearing wall and other building parts, and has good market prospect.

The invention discloses a solidification/stabilization treatment method for papermaking sludge. The method comprises the following steps of: adding a solidifying agent into the papermaking sludge with water content of 70 to 80 percent according to a weight ratio of the sludge to the solidifying agent of 100:14-24, stirring the mixture to react for 10 to 15 minutes and uniformly mixing the mixture to form solidified block precursors; and laying solidified block precursors which are uniformly stirred in a sludge landfill site according to a thickness of 5 to 100cm, covering a water-proof membrane on the solidified blocks and curing the solidified blocks for 2 to 10 days by using a dry curing method to form sludge solidified blocks, wherein the compressive strength of the sludge solidified block is 160 to 320kPa, the COD concentration in solidified block leaching solution is 110 to 200mg/L, and the water content of the solidified block is 30 to 40 percent; and the solidifying agent comprises the following components in percentage by weight: 40 to 50 percent of aluminate cement, 15 to 25 percent of fly ash and 30 to 40 percent of cinder; toxic heavy metal ions are wrapped after the sludge solidification, so that the pollution of the sludge is reduced; the solidified sludge does not have foul smell of the original sludge and reduces the harm to an operator during the operation; and the method has the advantages of readily available raw material, low cost, stable effect and simple operation procedure.

The invention discloses a method for blending corrugating base paper by utilizing secondary fiber after anaerobic digestion of paper mill sludge, belonging to the fields of recyclable material and environmental protection. The method comprises the following steps of: by using the secondary fiber obtained after anaerobic digestion of paper mill sludge, waste paper pulp and softwood pulp as raw materials, separating and brooming the fiber through defibering and beating treatment, then dewatering, mixing, and then adding a reinforcing agent and a sizing agent to defiber; and adding paper pulp after defibering in a sheet machine so as to form uniform pages, and then pressing and drying to form corrugating base paper. The method is simple in process and high in operability, and the secondary fiber after anaerobic digestion of paper mill sludge is utilized for mixing with the waste paper pulp for papermaking, so that the energy of papermaking enterprises is saved, simultaneously efficient resource utilization of remaining secondary fiber after anaerobic digestion of paper mill sludge is realized, a new raw material source is created for papermaking factories, the cleaner production level of papermaking enterprises is improved, the resource utilization ratio of paper mill sludge is realized to the maximum, and the method has important engineering application value.

The invention discloses a soil conditioner. The soil conditioner comprises the following components calculated by dry weight, in percentage by weight: 80%-85% of sludge and 15%-20% of flyash. The soil conditioner is environmental-friendly and suitable for soil remediation in desolated mountains and mine areas, can effectively prevent harmful gases released by the sludge from dispersing into the atmosphere, and at the same time has the effects that the soil fertility is prominently improved and the site condition for a plant is improved as well. The soil conditioner provided by the invention is easy and practicable, enables waste to be profitable, and can quicken soil remediation and land reclamation.

A soft wheat straw board without aldehyde is prepared through breaking by 10-15 mm, drying, fine breaking by 3-8 mm, sorting, mixing with glue, mechanical spreading, pre-pressing, hot pressing, intermittent pressing, cutting for removing edges, and cooling.

The invention discloses a dynamic gasification furnace and a waste heat boiler formed by the dynamic gasification furnace and relates to gasification equipment using solid fuel to produce synthesis gas. The invention has wide raw material suitability, and the raw materials comprise original msw, biomass, bio-coal briquette, coal-based briquettes, raw coal and loose coal. Through applying the invention, garbage and biomass gasification equipment with low investment, simple operation and easy popularization can be designed, can be operated as conventional boilers and can realize continuous raw material input, continuous deslagging and continuous synthesis gas output. The invention contributes to the active utilization of renewable energy, solves the problem of the treatment of domestic garbage and agricultural and agricultural and forest residues, ensures that the domestic garbage and agricultural and forest residues are transformed into clean energy, on one hand, the problem of environmental protection is solved, on the other hand, the situation of energy crisis is alleviated, creates conditions for promoting the overall coordinated and sustainable development of the economic society, and creates good development chance for rural areas which provide biological resources.

The invention discloses a waste oil-based environment-friendly mold separating agent and a preparation method thereof. The technical scheme provided by the invention adopts key points that the waste oil-based environment-friendly mold separating agent is mainly prepared from the following raw materials by weight percent: 20 to 40 percent of waste oil, 5 to 10 percent of emulsifier, 1 to 5 percent of wetting agent, 0.1 to 2 percent of sliding component and the balance of water. The invention further discloses the preparation method of the waste oil-based environment-friendly mold separating agent and the using method thereof. The waste oil-based environment-friendly mold separating agent provided by the invention is high in temperature resistance, has a good demolding effect, has strong rust preventing performance and is high in water scouring resisting performance, and the preparation method takes waste oil as raw material, gets rid of the dependence of a traditional mold separating agent on mineral oil, not only achieves waste comprehensive utilization, but also lowers the cost, and reduces environment pollutions and harm to human bodies.

The invention relates to a grouting material for an impervious curtain of a refuse landfill and a preparation method of the grouting material. The grouting material comprises the following components in percentage by mass: 40 to 50 percent of MSWI (Municipal Solid Waste Incineration) fly ash, 0.5 to 1 percent of organic sulfur, 3 to 6 percent of cement, 45 to 55 percent of water, and 1.5 to 2 percent of calcium hydroxide. The method for preparing the grouting material comprises the following steps of: (1) weighing raw materials; (2) mixing the MSWI fly ash, the water and the organic sulfur, and uniformly stirring for 5 to 10 minutes; and (3) interfusing the cement and the calcium hydroxide, and uniformly stirring for 3 to 5 minutes. According to the grouting material, the problems of material selection difficulty, high cost, poor fluidity, low stability and poor impermeability of a conventional grouting material can be solved. The preparation method has the advantages of short processroute, simple operation, time saving and the like.