43results about How to "Realization of secondary pollution" patented technology

The invention discloses solid fuel which is mixed by organic waste and sludge and a process for preparation. The solid fuel comprises the organic waste: 25%-55%, the sludge: 20%-50%, coal powder: 20%-50%, combustion improver: 0.15%-0.25% and desulfurization dechlorinating agent 0.5%-2%. The process for preparation comprises three stages of raw material preparation, molding and consolidation. The invention is tested by the solid fuel mechanical strength, burning characteristics, pollution control and the like. The solid fuel which is mixed by the organic waste and the sludge and prepared by the manufacturing process of the invention is comparatively ideal clean fuel with higher mechanical strength and can satisfy long-distance transportation with the falling strength more than 99%, the invention is the solid fuel with strong mechanical strength, good water resistance, excellent combustion characteristics, strong thermal stability and non pollution and can be extended to be applied in civilian uses and industrial sectors. The invention can also save a great amount of non-renewable fossil fuels such as petroleum, coal and the like with good social and environmental benefits.

The invention provides a method for producing biogas by the anaerobic fermentation of mixed blue algae and sludge, which belongs to the technical field of environmental protection purification and waste resource treatment. In the method, the blue algae and the sludge are mixed for the anaerobic fermentation to produce the biogas, and the whole process is completed in an anaerobic reactor; the blue algae and the sludge are mixed in the rector, N2 is introduced to form the anaerobic state, and the blue algae and the sludge are fermented at a temperature of between 35 and 37 DEG C; and in the rector, the blue algae is discontinuously and periodically added, the degradation condition of the material is observed, at the same time, the organic matter concentration of the discharged material and the concentrations of CH4 and CO2 in gas generated from fermentation are measured until the reactor is stably operated. The biogas generated is subjected to desulphurization treatment and supplied to users for combustion or collected for power generation; and the dregs generated are used as a fertilizer for farmlands. The method for producing the biogas by the anaerobic fermentation of the mixed blue algae and the municipal sludge has the advantages of having the effect of answering multiple purposes, thoroughly eliminating algae toxins, combining the blue algae utilization and the treatment of the sludge from a municipal sewage plant, and solving organic pollution problems in both the rural and urban areas.

The invention discloses a method for harmless treatment of waste incineration fly ash through a hydrothermal technology. The method comprises the following steps of (1) adding a hydroxyapatite precursor liquid into fly ash, and then performing first-step hydrothermal reaction under normal pressure at 40 to 50 DEG C to stabilize heavy metals in the fly ash; and (2) adding magnetic hydroxyapatite powder and hydrogen peroxide into a mixture obtained by the reaction of the step (1), and then performing second-step microwave hydrothermal reaction under a high pressure at 20 to 150 DEG C to furtherstabilize the heavy metals in the fly ash and degrade polyaromatic hydrocarbons. According to the method, stabilization of the heavy metals and degradation and detoxification of the polyaromatic hydrocarbons in the waste incineration fly ash can be realized efficiently and synchronously; the leaching toxicity of the heavy metals is lower than identification standards for hazardous wastes and can meet domestic waste landfill pollution control standards; the heavy metals are actually stabilized in the fly ash rather than being transferred to a hydrothermal waste liquid on a large scale; the toxic equivalent degradation rate of sixteen polyaromatic hydrocarbons is up to 95.06 percent; and secondary pollution is prevented.

The invention relates to a water purification machine, comprising a machine base, and a coarse filtration system and a fine filtration system which are mounted on the machine base. The water purification machine is characterized in that a mounting base with a triangular cross section is arranged on the machine base; a pedestal is arranged at the bottom of the machine base; an electrical element for controlling the systems is mounted in an accommodating cavity between the pedestal and the mounting base; the coarse filtration system is provided with two groups of filter elements connected in parallel; the fine filtration system is provided with two groups of reverse osmosis (RO) membrane assemblies connected in parallel; and the two groups of filter elements and the two groups of RO membrane assemblies are mounted on the inclined surfaces at the two sides of the mounting base respectively. The water purification machine is reasonable and compact in structure, convenient to assemble and low in cost; the water output quantity is large; and the water quality is fresh.

The invention discloses an electroslag remelting solid slag arc striking agent and an arcing method thereof. The electroslag remelting solid slag arc striking agent consists of the following components in percentages by mass: 3-5% of pre-melted slag, 0.3-0.5% of aluminum particles and the balance of scrap iron. The scrap iron is used as the main raw material of the solid slag arc striking agent, the scrap iron which is machining waste is recycled, the cost is low, secondary pollution does not exist, and the waste is reused; and moreover, resources are saved, the cost is greatly saved, and possibility of environmental pollution is eliminated. The method has the characteristics of simplicity in operation, stable process, high success rate and the like.

The invention belongs to the technical field of supported catalyst preparation and wastewater treatment, and provides a preparation method of an alpha-FeOOH/GAC catalyst and an application thereof indegradation of nitrobenzene wastewater in a supergravity field, aiming at the problems of non-uniform particle size, wide particle size distribution, difficult morphology control, efficient and thorough degradation of nitrobenzene wastewater and the like of crystals prepared by an existing oxidation precipitation method. FeOOH is rapidly prepared in batches by a supergravity technology coupled with an oxidation precipitation method, is cured and is loaded on activated carbon. The obtained catalyst is uniform in morphology, rich in surface hydroxyl and narrow in particle size distribution, andcan be produced in batches. The supported heterogeneous catalyst is used as a filler, and the nitrobenzene wastewater is treated by a method coupling supergravity with heterogeneous ozone oxidation. Rich hydroxyl groups on the surface of the catalyst can participate in chain decomposition of ozone in water, so that the generation of more .OH is promoted, and the mineralization rate of degraded organic matters is improved. The degradation of target organic matters and the deepening of mineralization degree are realized, and the subsequent biodegradability is improved.

The invention provides a method for removing and recovering arsenic and antimony in a water body by replacement of copper powder. The method comprises the following steps: (1) adjusting the pH of arsenic and antimony-containing wastewater to 0-3 by using hydrochloric acid; under nitrogen protection, adding copper powder, closing a reactor and stirring at a speed of 100-600r/minute to react, wherein the reaction temperature is 10-80 DEG C and the replacement time is 10-120 minutes; in the arsenic and antimony-containing wastewater, the content of As(III) is 0.1-10g/L and the content of Sb(III) is 0.1-25g/L; the use level of the copper powder is 5-100g/L based on the volume of the wastewater by mass; and (2) after replacement, filtering the reaction system, recovering filter residues and crystals which are obtained by recrystallizing the filtrate quickly at a low temperature. The method provided by the invention is simple in process, free of secondary pollution and economical and environment-friendly, and reproducible utilization of resources is achieved.

The invention discloses a method for recovering graphite from waste cathode carbon blocks in electrolytic aluminium production, which mainly includes steps of breaking and grinding, water leaching, floatation and acid leaching. The carbon content of the finally obtained graphite powder is up to more than 80 percent, the recovery rate is up to more than 90 percent, and the graphite powder can be used as a material for the production of carbon material for aluminium electrolysis, alumina desulfurizer and the like; and the recovered graphite powder has high purity, high value in use and remarkable economic and social benefits. The purity of sodium fluoride as byproduct is up to more than 96 percent, and therefore the sodium fluoride can be sold as a product; and calcium sulfate as byproduct can replace natural gypsum to serve as retarder for the production of cement. The method has the advantages of simple technique, low production cost, no secondary pollution, stable and reliable product quality, high yield and continuous and mass production, and realizes the recycling of carbon and fluorin resources.

The invention relates to a preparation method of convenient and fast nanofiber-based wiping cloth for nuclear pollution equipment. According to the preparation method, water-soluble polymer is used asa raw material, nanofibers are prepared through an electrostatic spinning method, the wiping cloth is prepared on a base material, the wiping cloth can improve the adsorption amount of radioactive metal ions through surface modification, the regeneration performance of the wiping cloth is improved, and rapid and deep cleaning treatment of the surface of nuclear pollution or radioactive pollutionsolid is achieved. The specific preparation method of the wiping cloth comprises the following steps of dissolving the hydrophilic polymer serving as the raw material into a solution for later use; and the hydrophilic nanofibers are prepared in the solution through an electrostatic spinning technology and woven into the wiping cloth on the material with a non-woven fabric as a base. The surface ofthe wiping cloth is modified through functional groups, the adsorption amount of the radioactive metal ions of the wiping cloth is increased, the regeneration performance of the wiping cloth is improved, and the fast deep cleaning treatment on the nuclear pollution or radioactive pollution solid surface is realized.

The invention discloses a high-temperature plasma organism disposal shelter and a disposal method. The shelter comprises a shelter body and a disposal system, wherein a disposal area is arranged in the shelter body, and the disposal system is arranged in the disposal area of the shelter body; and the disposal system comprises a plasma gasification melting furnace, a slag fishing device, a secondary combustion chamber section, a quenching deacidification tower, a dust remover, a hydroxyl generator and a chimney, wherein the plasma gasification melting furnace is used for carrying out gasification decomposition treatment on organisms, the slag fishing device is arranged at a slag discharge port of the plasma gasification melting furnace, and a flue gas outlet of the plasma gasification melting furnace is connected with a flue gas inlet of the secondary combustion chamber section. According to the disposal shelter, gasification decomposition is carried out on the organisms in a high-temperature reducing atmosphere, and dioxin is not generated in the gasification decomposition process; and by arranging the secondary combustion chamber section, the quenching deacidification tower, the dust remover and the hydroxyl generator, deacidification, denitrification and salinity treatment on flue gas generated by gasification and decomposition are achieved, secondary pollution is avoided, complete harmless treatment of organisms is achieved, the volume reduction effect is remarkable, harmless treatment is thorough, and the organic matter burn-down rate is high.

The invention belongs to the technical field of the outdoor garbage can, and particularly relates to an underground living garbage can. The underground living garbage can comprises an outer barrel, a first inner barrel, a can cover, an intermediate barrel, a foot pedal and a baffle. The upper end of the outer barrel is connected with the can cover. The can cover is connected with the foot pedal. The bottom of the intermediate barrel contacts with the bottom face of the outer barrel. The upper part of the intermediate barrel is connected with the inner barrel by a hoop. The intermediate barrel is provided with the baffle. The barrel bottom of the first inner barrel is arranged on the baffle. The first inner barrel comprises a first inner barrel bottom and a first inner barrel body. One end of the first inner barrel bottom is connected with the first inner barrel body by a hinge, and the other end is connected with the first inner barrel body by a pin shaft. The upper part of the first inner barrel body is provided with lifting ears. The first inner barrel bottom is provided with through holes. The inner surface of the first inner barrel bottom is provided with pricking pins. The through holes and the pricking pins are alternately installed. The underground living garbage can has the characteristics of simple structure and convenient use, and is capable of realizing the separated treatment of the solid garbage and the liquid garbage, and reducing the environment pollution.

The invention discloses a well drilling waste mud recycling and reusing low-temperature treatment system which comprises a well drilling waste mud collecting and pumping system, a material distributor, a low-temperature drying mechanism, a steam generating and conveying system and a material post-treatment system. The steam generating and conveying system is connected with the low-temperature drying mechanism; the material post-processing system is arranged at a material outlet of the low-temperature drying mechanism; the well drilling waste mud collecting and pumping system comprises a well drilling waste mud collecting pool, a mud stirrer, a mud conveying pipeline and a single-screw pump, the mud stirrer is installed in the well drilling waste mud collecting pool, one end of the mud conveying pipeline is connected with an outlet of the well drilling waste mud collecting pool, and the single-screw pump is installed on the mud conveying pipeline. The device is simple in structure and convenient to use, the drilling waste mud can keep the original activity of the mud when treated in a low-temperature state, and the device can be reused without waste, has no pollution hidden danger and is low in treatment cost.

The invention provides a preparation method of a novel ecological slope protection material. The preparation method comprises the following steps that S1, sludge is pumped through an environment-friendly cutter suction type dredging pump, filtered through a primary filter screen technology and then enters a sludge storage pool; S2, a microbial deodorant is sprayed in the sludge storage pool for deodorization; S3, the deodorized sludge enters a sludge concentration tank through a pipeline to be pretreated, and the pretreated sludge is conveyed into a mixing tank; S4, crushed slag, fly ash and construction waste are added into the mixing tank to serve as brick making raw materials, the raw materials are mixed with supernate obtained by concentrating and digesting the sludge, meanwhile, a curing agent is supplemented to conduct curing treatment on the mixed materials, and the mixed materials do not form large bonding blocks after being mixed; and S5, static pressure molding is conducted on the mixed materials in the mixing tank through an automatic control brick press, and after molding, the mixed materials are transported into a curing room for curing. By the adoption of the above scheme, harmlessness and recycling of the sludge at the river bottom and the lake bottom can be achieved synchronously, the treatment cost is low, and economic benefits are good.

The invention discloses a low-temperature plasma-biological integrated reaction system for treating organic waste gas. The system comprises a gas circuit control unit, a low-temperature plasma reaction device, a process parameter monitoring auxiliary system and a biotrickling reaction device; the gas circuit control unit is connected with the low-temperature plasma reaction device, and the low-temperature plasma reaction device is connected with the biotrickling reaction device; the system integrates gas flow accurate control, low-temperature plasma efficient pretreatment and gas-liquid-solidthree-phase efficient reaction, and has the obvious advantages of controlling secondary pollution (O3), being high in control precision, excellent in safety performance, high in automation degree andthe like. According to the reaction system, the PLC is used for dynamically adjusting and automatically and accurately adjusting parameters such as discharge voltage and liquid-gas ratio according toreal-time data feedback, so that the pollutant treatment precision and efficiency can be effectively improved, the secondary pollution influence is solved, the operation cost and the system energy consumption are reduced, the automation of the system is realized, and the waste gas and pollutant treatment capacity is obviously improved.