168results about How to "Significant social benefits" patented technology

The automatic control method for steel ball coal mill in thermal power plant adopts a double-layer control structure, including an upper layer of self optimizing algorithm and a lower layer of multidimensional fuzzy control algorithm. The self optimizing algorithm finds out the optimal inside coal storage quantity inside the coal mill, the optimal outlet temperature of the coal mill and the optimal inlet negative pressure value of the coal mill as the controlling set values; and the multidimensional fuzzy control algorithm realizes the automatic regulation of the coal feed quantity, the hot air valve opening, and the recirculating air valve opening or the cold air valve opening, so as to ensure the safe and reliable running of the steel ball coal mill system in optimal mode.

The invention belongs to the technical field of environmental engineering, and particularly relates to a process for preparing a sludge autoclaved aerated concrete building block. The process mainly comprises the following steps of: (1) quickly stirring and mixing spare dried sludge, water and lime, coal ash, cement, gypsum and aluminum powder with physical and chemical properties meeting the brick making requirements in a certain ratio and in turn; (2) feeding the mixture obtained in the step (1) into a die, and putting the die into a thermostatic curing box of 40 DEG C or 60 DEG C to perform foaming and curing for 4 hours; (3) putting the blank foamed and cured in the step (2) into an autoclave, and curing the blank for over 8 hours by adopting a stepwise buck-boost curing mode; and (4) piling the product discharged from the autoclave outdoors for over 2 days. The process can reach hazard-free and recycling treatment of urban sludge, save clay resources and save the brick making cost, and has remarkable economic, social and environmental benefits.

A method for manually-cultivating three-stage Rhizoma Paridis belonging to the technical field of agriculture includes primary seedling planting and raising, secondary seedling planting and raising, Rhizoma Paridis cultivation and field management, wherein, the primary seedling planting and raising includes the steps of presprouting of seeds and seed seedling raising, when tubers weigh 2g after 3 years, transplantation can be carried out. The secondary seedling planting and raising includes the steps that: the primary seedlings with 2g of tubers are transplanted in October and last third of November and transplantation can be carried out when the tubers are 15g after 3 years. The steps of Rhizoma Paridis cultivation and field management are that: the secondary seedlings are transplanted according to the proportion of 21,000 seedlings in per acre in October and last third of November, and mature Rhizoma Paridis can be dug after 3 years; farmyard manure is fertilized once or twice every May and last third of August with the amount of 3000kg per acre every time, or carbamide is fertilized or foliar fertilizer is sprayed for three times in the vigorous growth period; in the non-seed-collecting filed, ovaries are picked off after sepals unfold; commercial pesticide is used for preventing plant diseases and insect pests in the growth period of the Rhizoma Paridis. The method for manually-cultivating Rhizoma Paridis is characterized by less investment, early effect, good harvest, high efficient, etc., which can realize major production.

The invention belongs to protective fishery field, which in detail relates to two-cycle water treating system for industrialized fish culturing, with main characteristics being: internal recycle pool structure of various shape taking square outside and round inside as representation, cultivating fish in circular pool, the quadrangle outside pool is biological filter; water and pollution discharging pipe are equipped in bottom of pool; the mating outside circular system comprises drainage ditch, out biological filter and artificial wet land, feed ditch, pollution collecting tank; special air raising pump of U shape, high effective aeration, water raising cycle; the artificial wet land and out biological filter are combined together, depositing, filtering, adsorption, bacteria degradation, adsorption by aquatic plant and animal and cleaning water body high effectively; constructing open water inlet and outlet pitch which also used as biological filter by using fish pond to realize omni-bearing restore of cultivating wastewater. The invention is characterized by less equipment investment, low energy consumption, safe and reliable operation, convenient management and maintenance, outstanding ecological, economical and social benefit, low production cost and increased quantity and quality.

The invention relates to a method to make electrolysis manganese metal by titan white spent acid and manganese dioxide mine. The feature is that it uses the H2SO4 and Fe2+ in the titan white spent acid as assistant material, adds manganese dioxide mine and sulfur iron ore to make electrolysis manganese metal. The invention solves the environment pollution problem caused by titan white spent acid. The electrolysis manganese metal has high quality and reaches the YB / T051-2003DJMnA high purity production standard.

A kind of traffic control method that guarantees viaduct is unimpeded, comprises the following steps: (1) establishes viaduct main line real-time traffic state model: install signal light, traffic flow detector at each ramp entrance and ramp exit, and described signal light and traffic flow detector are all Connect with the signal control server; a viaduct is divided into N controllable units by the ramp, N is a natural number, and the main line section of the viaduct between two adjacent ramps is determined as a controllable unit; (2) Based on traffic capacity-saturation (3) On-ramp control process: The cycle of the on-ramp regulation signal of the controllable unit i has two phases, that is, there are green lights and red lights for allowing vehicles to enter the viaduct and forbidding vehicles to enter the viaduct respectively Indicates that the base determines the green light time tg and the red light time in the time period [KT, (K+1)t]. The invention has good real-time performance, good control effect and good adaptability.

The invention pertains to the technical field of composite material science and environmental protection and relates to opening coal dust polluting inhibitor and the preparation method thereof. The inhibitor is the hydrophilic material compounded by a plurality of compounds, and every compound and the weight percentage thereof is that: 15-20 percent main film forming resin, 25-30 percent auxiliary film forming resin,1-2 percent thickening agent, 15-20 percent dispersant, 2-3 percent mould inhibiting antiseptic agent, 1-2 percent anti-sedimentation agent, 2 percent defoamer, 15-20 percent powder and 3-5 percent color paste. The invention adopts the theory of gravity flow mat gloss solidification, which effectively overcomes the disadvantages of uneven film forming thickness, long film forming time, poor stability of film layer, etc of original self-solidification inhibition materials. The invention has low price, and production thereof is simple and practical; in addition, the invention has remarkable economic, environmental and social benefits, and is applicable to treat raised dust pollution in the fields of shipping, power, mine, road, metallurgy, etc.

The invention belongs to the field of nutrient medium for soilless culture and a method for making the nutrient medium. The medium comprises a solid part and a nutrient solution. The making method comprises the steps of: pulverizing cotton seed shells and coal cinders, placing into two fermenting tanks, adding the nutrient solution until the materials absorb saturatedly, coating and fermenting for 8-14m; adding 2-4kg of 70% dexon raw powder into the decomposed cotton seed shells and the coal cinders per ton, uniformly stirring and airing; mixing the decomposed cotton seed shells and the coal cinders according to the volume ratio of 3:1-12:1; mixing 25-35kg of cake fertilizer to the mixed medium per ton, adding urine until the saturate state, re-coating and re-fermenting for 5-7m to enable the pH of the nutrient medium to be 7.0-7.5 when the fermentation is stopped, finally, adding a proper amount of sulfur powder to adjust the pH of the nutrient medium to be 6.0-7.5 so as to adapt the requirements of different plants. The nutrient medium has rich nutrient, favorable permeability, water retention, fertilizer retention, convenient making and wide raw material sources, and is suitable for various flowers and vegetables growing.

The invention relates to a preparation method and use of an aqueous polymer / isocyanate adhesive, which belong to the technical field of chemical adhesives. In the invention, recycled polyethylene terephthalate (PET), diethanol amine, caprolactam and aqueous solution of glacial acetic acid are used to prepare a PET water-based polymer; toluene diisocynate and castor oil are used to prepare an isocyanate-terminated polyurethane prepolymer; and when used, PET aqueous polymer emulsion and the isocyanate-terminated polyurethane prepolymer are mixed at room temperature to obtain the aqueous polymer / isocyanate adhesive. The aqueous polymer / isocyanate adhesive is used for adhering wood.

The invention discloses a method for producing black tea through artificial intelligence enzymatic fermentation. The method has the advantages as follows: (1) the preparation process for producing high-quality black tea is a mechanical, intelligent and biological fermentation preparation process; (2) mechanical equipment configured for the process is energy-saving and environment-friendly, so that the economic, social and ecological benefits are significant; (3) the process integrates a computer intellectual technology to the field of black tea processing, so that a new high-tech process technology is initiated for black tea processing in China; (4) a glucoamylase enzymatic biological fermentation technology in the method disclosed by the invention optimizes the quality of the black tea and increases the nutritional function of the black tea; (5) a microwave sterilization process of the method discloses by the invention thoroughly kills all harmful organisms to ensure the quality safety of a product.

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 an abrasion-resistant recycled asphalt concrete and a preparation process thereof, relates to the technical field of asphalt concrete processing, and solves the problem that asphalt concrete pavement is prone to ageing due to frequent temperature changes and is prone to large abrasion during use. The abrasion-resistant recycled asphalt concrete comprises the following components in parts by weight: 75 to 80 parts of new aggregate, 5 to 8 parts of SBS modified asphalt, 0.5 to 0.7 part of mineral powder, 20 to 35 parts of a recycled asphalt mix old material, 0.2 to 0.4 part of a regenerating agent, 6 to 10 parts of steel slag, 0.4 to 0.8 part of hydrated lime powder, 1.8 to 2.6 parts of fiber filler, 0.5 to 1.5 part of abrasion-resistant filler, 0.4 to 0.8 part of carbon black, 4.5 to 7.5 parts of sericite particles. The abrasion-resistant recycled asphalt concrete in the invention has good stability in the use process, is not easy to age due to intermittent friction heat generated between the abrasion-resistant recycled asphalt concrete and a wheel, and is not easy to greatly wear.

The invention discloses a method for treating high-concentrated non-degradable wastewater by using wastewater containing hydrogen peroxide, which comprises: (1) uniformly mixing the wastewater containing the hydrogen peroxide and the high-concentrated non-degradable wastewater in an oxidation pond, adding acid to adjust the pH value of the wastewater, and adding a catalyst to perform Fenton oxidation reaction; (2) adding an alkali in wastewater obtained after the completion of the oxidation to adjust the pH value of the wastewater, and performing flocculating setting in a settling basin; and (3) treating supernatant and settled sludge respectively after the completion of the settlement. The method treats the high-concentrated non-degradable wastewater by using the wastewater containing thehydrogen peroxide, thereby saving the treatment cost of both the wastewater containing the hydrogen peroxide and the high-concentrated non-degradable wastewater. The method has obvious social benefits and environment protection benefits while creating excellent economic social benefits.

The invention relates to a new process for treating coal gasification wastewater with active coke, which comprises the following steps: first-stage absorption is carried out on coal gasification wastewater by directly using active coke to remove most of COD, suspended matters and chroma; after the absorption treatment, the outlet water enters an immobilized microbe-anaerobe filter chamber (hereinafter referred to as I-AF) and immobilized microbe-aerobe aeration biological filter (hereinafter referred to as I-BAF) system to be biologically treated, thereby removing most of ammonia nitrogen and COD in the wastewater; second-stage deep absorption is carried out on the outlet water performed by I-AF+I-BAF processing by using active coke; and the outlet water satisfies Grade 1 in Sewage Comprehensive Emission Standard GB8978-96. Compared with the traditional treatment process, the invention has the advantages of simple technical process, low treatment cost, favorable COD and ammonia nitrogen removal effect, small occupation area of facilities, and convenient operational management. In addition, the saturated active coke can be recycled by heating in the anaerobic atmosphere, and the phenols in the saturated active coke can be recycled or the saturated active coke can be directly used as fuel. The invention can be used for treating coal gasification wastewater, coked wastewater and the like at low cost, and has unique effects for treating various high-concentration industrial wastewaters and modifying the prior processes.

The invention discloses a slow sinking type puffing aquatic product matched pellet feed. The pellet feed contains 9-15% of carbohydrate and 8-22% of grease. The puffing degree of the pellet feed is 1.1-1.25, and the volume mass is 380-420kg / m<3>. The pellet feed is a special feed with low sugar and high grease for artificial carnivorous fish culture. The invention also provides producing equipment and method of the pellet feed. The producing equipment comprises a crusher, a mixer, a quality controlling machine, a dual-screw puffing machine, a granulating machine, a dryer and the like which are sequentially connected. A screw assembly in the dual-screw puffing machine consists of a delivering area screw, a kneading area screw and a forming area screw. The invention can obviously enhance the quality of the fish, greatly reduce the generation of fatty liver in the fishes, and ensure the uniform size of the finished fishes.

The invention discloses a method for improving the ability of paddy parasitoids to control rice hoppers and rice leaf tiers, which pertains to a technical filed of agricultural biological control of insect pests. The method comprises the following steps: (1) a bund is consolidated 30 days before seedling transplanting of single cropping rice or double-cropping late rice; (2) sesame seed is sowed in the bund 30 days before seedling transplanting, and urea is applied after sesame is in bloom and potassium dihydrogen phosphate is applied on leaf area; (3) pesticide is not allowed to use within 40 days after seedling transplanting and steps such as spraying pesticide under the condition of no wind 40 days after seedling transplanting are carried out. The method of the invention is characterized by labor saving, time saving, simple operation, etc. and can not only improve the ability of paddy parasitoids to control rice hoppers and rice leaf roller but also reduce the application of pesticide with obvious economic, ecological and social benefits. The method can be widely applied in rice cultivation areas.

The invention provides a comprehensive utilizing method for agricultural wastes and plastic wastes, which belongs to the waste treatment and utilization field. The comprehensive utilizing method for agricultural wastes and plastic wastes of the invention comprises the following steps that: firstly, the agricultural wastes and the plastic wastes are classified for sorting, wherein, the agricultural wastes adopt crop straws or edible mushroom sticks; secondly, the agricultural wastes are processed to form flammable gas; thirdly, the plastic wastes are processed to form flammable gas; fourthly, the flammable gas obtained through the second and the third steps is stored in a mixed way. The agricultural wastes and the plastic wastes are transformed from wastes into treasure through harmless treatment performed on the agricultural wastes and the urban plastic wastes, and the whole process is safe and reliable without secondary pollution.

The invention relates to a method for innocent treatment of low-concentration arsenic-containing waste residue and recovery of arsenic. Aiming at low-concentration arsenic-containing waste residue, according to the invention, a multistage alkaline leaching method is adopted, wherein mechanical stirring is performed for 10-12h in the environment of 60-80 DEG C, three-stage successive leaching is adopted, the arsenic leaching rate reaches more than 80%, the arsenic content of waste residue after treatment is less than 0.05%, which is lower than the hazardous waste identification limiting value, and therefore, the waste residue can be used as making material of building materials. As2O3 in an arsenic-containing alkaline leaching solution can be recovered by acid neutralization and sedimentation, and ferric sulfate is added to a leaching solution after filtering and sedimentation so as to produce FeAsO4.2H2O sedimentation, the comprehensive arsenic removing rate of the arsenic-containing alkaline leaching solution can reach 99%, and filter liquor can be recycled. Compared with the prior art, according to the invention, no wastewater discharge is caused in the whole process, the technology is simple, and the material is easily available, and the method can be widely popularized and applied to treatment and resource utilization of low-concentration arsenic-containing solid waste.

The invention relates to a burner for external spiral intake volatization and atomization type parking heater with a flat cap and necking, which belongs to the field of burners. The technical scheme provided by the invention mainly adopts a compressed air chamber of an external spiral intake structure, an afterflaming barrel and a flat end cap, wherein an S-shaped diversion rib which corresponds to a compressed air outlet is fixedly arranged at the inner wall of the compressed air chamber; the afterflaming barrel is formed by stamping and drawing metal, and one end of the afterflaming barrel is contracted toward an inner plane; and one side of the flat end cap is provided with 3-5 long slant air inlets, and 5-15 auxiliary air inlets are uniformly arranged in the middle of the flat end cap. The burner has the advantages that the burner has a simple structure, a small volume and small noise, is easy to start and clean to burn, has high power density, and particularly saves the electricity quantity of an automobile storage battery; the burner stably burns and has high burning efficiency, the service life of a motor is greatly prolonged, and requirements on the automobile storage battery and the motor of a compressor are lowered; the burner can realize the common use of diesel, gasoline and kerosene, and can also be used on other heating devices except a fuel heater; and the burner has strong practicability.

The invention discloses a vegetable oil based insecticidal acaricide, which comprises (by weight percent) gum spirit of turpentine 5-75%, wintergreen oil 0-55%, elliptone 0.01-5%, and balancing adjuvant.

The invention relates to a reamed carrier and stiffness core multi-component composite pile and a soft soil foundation strengthening construction method. The reamed carrier and stiffness core multi-component composite pile comprises a discrete pile, a stiffness core pile is inserted into the discrete pile vertically and penetratingly, the bottom end of the stiffness core pile is flush with the bottom end of the discrete pile, and the bottom ends of the stiffness core pile and the discrete pile are jointly connected with a spherical carried reamed head to form the reamed carrier and stiffness core multi-component composite pile. The soft soil foundation strengthening construction method by the reamed carrier and stiffness core multi-component composite piles includes driving a plurality of the discrete piles, the reamed carrier and stiffness core composite piles and / or stiffness core composite piles into a soft soil foundation; the construction steps of the discrete piles, the reamed carrier and stiffness core composite piles and the stiffness core composite piles include (1) discrete pile construction, (2) reamed carrier and stiffness core composite pile construction and (3) stiffness core composite pile construction. The composite pile has the advantages of good drainage effect and high bearing capacity, and the method has the advantages of simple and mature technology, remarkable strengthening superiority and high benefit.

The invention discloses a numerical control band sawing machine with a vibration attenuation and deviation rectification control device. An existing band sawing machine tool has the problems that a saw band vibrates, deviates and deforms, and consequently the workpiece saw cutting quality is lowered. A clamping mechanism clamps a workpiece to a workbench of a machine body. A saw band is tightened through a tightening mechanism. A main movement servo motor drives a drive saw band wheel. A feeding servo motor drives a feeding mechanism so as to drive a saw frame. Two deviation rectification devices are provided with eddy current displacement sensors for detecting displacement of the two ends of the saw cutting part of the saw band and inputting the detection result into a control module for calculating the vibration value and the saw cutting error of the saw band. The tightening mechanism, the deviation rectification devices and a vibration attenuation device are all controlled by the control module. By the adoption of the numerical control band sawing machine with the vibration attenuation and deviation rectification control device, according to the detection result of saw band vibration, the vibration attenuation device and the tightening mechanism are jointly controlled, and vibration is eliminated; and according to the detection result of the saw band movement error, automatic adjustment is achieved through the deviation rectification devices, so that the saw cutting accuracy and surface quality are improved greatly.

The invention discloses a circulating fluidized bed boiler system for incinerating waste blades and a working method thereof, and belongs to the technical field of fluidized bed boilers. A secondary air port of a circulating fluidized bed boiler is connected with a secondary fan through a secondary air pipeline; a crushing device is connected with an iron removing device, the iron removing deviceis connected with a conveying device, the conveying device is connected with a crushing device, the crushing device is connected with the secondary air pipeline through a conveying pipeline, and a first induced draft fan is arranged on the conveying pipeline; a flue gas outlet of the circulating fluidized bed boiler is connected with an inlet of a cyclone separator through a horizontal flue, and an upper end outlet of the cyclone separator is connected with a flue gas tail gas treatment system; and a bottom outlet of the cyclone separator is connected with a material returning system through avertical pipe, and the material returning system is connected with a material returning inlet of the circulating fluidized bed boiler. The system is reasonable in structure, the change of an originalCFB boiler system is small, the heat value of the waste blades is fully utilized, and centralized, harmless and resource treatment of the waste blades is realized.

The invention relates to a light-emitting diode (LED) tunnel lamp, which comprises LED lamp caps, a front cover, a radiator and a tail cover. The LED lamp caps respectively consist of a substrate, a plurality of single chip LEDs, a lamp cap seat and a lens. The radiator consists of two eudipleural lambdoidal hollow cylindrical objects and fins respectively arranged on convex surfaces of the hollow cylindrical objects; the LED lamp caps are respectively arranged on lambdoidal angular surfaces of nearly symmetric axis on concave surfaces of the hollow cylindrical objects of the radiator; and the front cover and the tail cover are fixedly arranged on the radiator through screws. The LED tunnel lamp has the following advantages: 1, under the action of an open illumination chamber, light distribution of the LED lamp caps is even, and the light intensity is enhanced; 2, natural ventilation channels are additionally arranged on the radiator, and therefore, power consumption-free heat dissipation is realized, the junction temperature of the LED tunnel lamp is reduced, and the light decay speed of the LED tunnel lamp is reduced; and 3, a shell-type structure of the front cover and a shell-type structure of the tail cover are communicated with the outside through an upper space and a lower space, and therefore, the LED tunnel lamp is ventilated without accumulated water, the working environment of the LED tunnel lamp is improved, and the service life of the LED tunnel lamp is greatly prolonged.

The present invention discloses an organic liquid fertilizer and its preparation method. It utilizes the molasses produced in production process of white granulated sugar as main raw material, and makes it undergo a series of steps of dilution, filtration, pH value regulation, fermentation and pasteurization to obtain the invented final product richly containing the elements of nitrogen, phosphorus and potassium, etc.

The invention relates to a natural repairing and recovering method of deteriorated grassland in the loess plateau, and belongs to the technical field of recovering methods of the deteriorated grassland. The method is based on forbidden recovering and supplemented by the manual control and manual interference measures, namely cement stand columns, chain line fences and other forbidden facilities are arranged to completely forbid the original areas where grassland vegetation is destroyed and degraded seriously or agriculture and forestry can not be operated and forage grass can grow, human and animal interference can be controlled strictly, and chance and time for living and multiplying of grassland are given. The method can improve the converge degree of deteriorated grassland vegetation by 50-75% and the biomass of the grassland vegetation by 50-80%, the diversity of species is richer and richer, the number of grassland vegetation and species is increased to 313 from 68 before the forbidding, the grassland quality is improved, and in the plant structure of the recovered grassland community, the grass family and feverfew plants account for 26.8%, the beam or pea family plants account for 8.3%, and the other plants accounting for 64.9% are included in the 33 families. The ecological economy and social benefits of the grassland are significant, and the grassland becomes the demonstration model of the loess plateau.

The invention relates to a seed coating agent, in particular to a seed ginger seed coating agent for preventing ginger wilt. The seed ginger seed coating agent provided by the invention adopts active ingredients of low-toxicity reagents, which are safe to non-target organisms and environment, do not have adverse harm to human bodies and are suitable for the seed ginger treatment. Particularly, a compound recipe used by the seed coating agent can effectively utilize the efficient sterilizing effect of bromothalonil, meanwhile, a good protection effect of pyrimidine nucleoside antibiotics is utilized, and the medicine effect is enhanced, so the seed ginger seed coating agent has good effects of preventing and treating the ginger wilt. Meanwhile, the sterilization mechanisms of bromothalonil, pyrimidine nucleoside antibiotics and the zhongshengmycin are diverse from each other, and the generation of medicine resistance of ginger wilt germs can be effectively relieved.

The invention provides a method for treating coking biochemical effluent by microwave-oxidation-coagulation technology, which comprises the following steps of: A, adding a mixed reagent consisting of H2O2 and Fe2+ into the coking biochemical effluent until the mass concentration of hydrogen peroxide in water is between 0.01 and 1 percent, and controlling the pH to between 2.0 to 6.0; B, delivering the mixed liquid into an industrial microwave oven for processing for 5 to 60s; C, regulating the pH value of the mixed liquid to between 6.0 and 6.5 or 7.5 and 8.5, and carrying out oxidation treatment for 1 to 4 hours under an aeration condition that the aeration rate is 10 to 40m<3> / h; D, adding a coagulant into the liquid until the mass concentration of the coagulant in the liquid is betweenone millionth and one hundred thousandth; E, precipitating and separating; F, filtrating the liquid to obtain process effluent for recycling; and G, collecting sludge, separating the liquid from the sludge; and returning the liquid to the step D, and filter-pressing the sludge to obtain sludge cakes. The method realizes recycling, does not discharge sewage, and effectively solves the problem thatpresent coking sewage is difficult to treat and to recycle.

The invention provides a method for respectively extracting and using inorganic matters in sludge, and belongs to the technical field of sludge treatment. The method comprises the following steps: (1) pretreating the sludge; (2) extracting inorganic salt from a sludge solution subjected to pretreatment; (3) adding a precipitant a1 into the inorganic salt extracting solution obtained in the step (2) till precipitates are separated, and forming inorganic salt A1 for recycling; (4) adding a precipitant a2 into precipitate-removed supernate in the step (3) till precipitates are separated, and forming inorganic salt A2 for recycling; (5) by parity of reasoning, adding a precipitant an into the precipitate-removed supernate in the former step till precipitates are separated, forming inorganic salt An for recycling. According to the method, the inorganic matters in the sludge are respectively recycled, so that weight reduction for the sludge is realized, and resource utilization of the sludge is also realized; the method is simple in process, high in applicability, simple and convenient to operate, easy to control, low in operating cost, good in treatment effect, wide in application range and easy to popularize and use.

The invention discloses a method for recovering rare / inert metals from a bottom electroplating copper / nickel material, which comprises the following steps: (1) pretreatment; (2) preparation of rare / inert metal removal liquid: adding a complexing agent and an oxidizer into an inorganic acid water solution to prepare the rare / inert metal removal solution, and heating the rare / inert metal removal solution to 50-70 DEG C; (3) oxidation and complexing of copper / nickel coating: immersing a dried electroplating material in the rare / inert metal removal solution, and standing until the rare / inert metal foil is thoroughly removed from the surface of the electroplating material base; (4) filtration and filter residue drying: taking out the electroplating material subjected to rare / inert metal removal, filtering the copper / nickel-containing solution with the rare / inert metal foil to obtain a filtration residue containing the rare / inert metal foil and / or a nickel ion filtrate, and washing and drying the filtration residue to obtain the rare / inert metal foil. The gold recovery rate of the method can reach 98% above.