250results about How to "Reduce the content of harmful substances" patented technology

The invention relates to a method for tail gas recycling sulphur recovery. The method of the invention comprises the steps that external acidic gas is blended with inert gas to reduce the concentration to 2 to 5 percent; after being treated with condensate separation, the mixed gas is heated to 200 to 220 DEG C and blended with air, the oxygen content of which is calculated and which is heated to 200 to 220 DEG C, to react after entering a catalytic oxidation reactor; the gas after the reaction enters a condenser to condense the sulphur; the condensed gas-liquid mixture is treated with the separation of liquid sulfur and gas by a sulphur separator and the gas is then discharged after being washed in a washing tower. In addition, the method for tail gas recycling sulphur recovery also comprises the steps that: 1) when a car is previously run and re-run after the system shutdown, the anoxic gas which is blended with the external acidic gas and dilutes and reduces the concentration of the external acidic gas to 2 to 5 percent is nitrogen gas, and after the car is normally run, the anoxic gas is the discharged gas which is pre-calculated and washed in the washing tower. Meanwhile, the method for tail gas recycling sulphur recovery can greatly reduce the exhaust emission amount of the treated tail gas and also reduce the content of surphur in the emitted tail gas.

The invention discloses an environment friendly low-gas-content aluminum alloy ingot which comprises the following components in percentage by weight: 1.6-3.3 percent of Cu, 9.8-11.8 percent of Si, 0-0.29 percent of Mg, 0-0.08 percent of Zn, 0-0.8 percent of Fe, 0-0.48 percent of Mn, 0-0.48 percent of Ni, 0-0.1 percent of Ti, 0-0.1 percent of Pb, 0-0.2 percent of Sn, 0-0.25 percent of other trace elements and the balance of aluminum. Meanwhile, the invention also discloses a production method of the environment friendly low-gas-content aluminum alloy ingot. The environment friendly low-gas-content aluminum alloy ingot has the advantages of low gas and dreg content, high aluminum liquid cleanness and good mechanical and machining properties. The production method has the advantages of low production cost and high efficiency and effectively solves the pollution problem of the secondary aluminum industry.

The invention discloses a water quality improvement agent for aquaculture and a preparation method thereof. The water quality improvement agent is prepared from the following raw materials in percentage by weight: 5 percent to 10 percent of lactobacillus, 5 percent to 10 percent of photosynthetic bacteria, 5 percent to 10 percent of bacillus, 5 percent to 10 percent of brown sugar, 10 percent to 20 percent of activated carbon, 25 percent to 35 percent of zeolite powder, 3 percent to 5 percent of citric acid, 2 percent to 5 percent of sodium bicarbonate and 10 percent to 15 percent of calcium peroxide. According to the water quality improvement agent disclosed by the invention, organic matters in a water body of water for the aquaculture can be reduced, and the content of ammonia-nitrogen and nitrite is greatly reduced; the chemical oxygen consumption of pond bottom sludge is improved and oxygen debt of the pond bottom is alleviated; growth and proliferation of beneficial microorganismsand decomposition of organic pollutants are accelerated and the circulation of pond substances is accelerated; the proliferation of beneficial algae in a pond is accelerated so that the pond dissolved oxygen is increased; a culture water region environment is improved, healthy growth of aquatic animals is promoted, the feed coefficient is reduced and the economic benefits are increased.

The invention particularly provides a visible-light-quick-curing vinyl ester resin composite prepreg, and a preparation method and application method thereof, belonging to the field of repair of a fiber-reinforced resin-base structure with certain thickness. A special vinyl ester resin is used as a matrix; the proper visible light initiator, thermal initiator and other aids are selected to constitute the light-thermal composite initiation system; magnesium oxide is used as a thickener; different types of fabrics are selected as fiber-reinforcing materials according to performance requirements; and a proper composite technique is utilized to prepare the composite prepreg with certain thickness. The visible-light-curing prepreg material can be cured within 5 minutes under the single-side irradiation of visible light, and the once-time photocuring thickness can reach 10mm or above, thereby basically solving the problems of poor operability, poor safety and insufficient film thickness under ultraviolet light. The visible-light-curing prepreg can be subjected to mass application in the field of structure repair.

The invention discloses a production technology for smelting ferronickel from laterite-nickel ore, belongs to the technical field of ferronickel smelting, and solves problems that existing technologies for smelting the ferronickel from the laterite-nickel ore are low in nickel recovery rate and higher in energy consumption. The production technology comprises steps as follows: (1) drying, crushing, screening and then mixing the laterite-nickel ore, additives and a reducing agent in the mass ratio of 100:(13-25):(10-20) respectively to obtain spheres with the particle size ranging from 30-50 mm; (2) preheating and then sending the spheres into a rotary kiln at the temperature of 1150-1250 DEG C for high-temperature reducing roasting for 4-8 h to obtain reduced roasted ore; (3) sending the reduced roasted ore and a smelting aid into an electric furnace for smelting at the temperature of 1500-1650 DEG C for 2-3 h to obtain a finished product, that is, the ferronickel. According to the production technology, RKEF (rotary kiln-electric furnace) and direct reduction are combined, multiple additives are used, the recovery rate is high, and the energy consumption is low.

The invention relates to a polyvinyl chloride plastics specifically used for an environment-friendly household power wire, which contains components with the following weight contents: 50 percent of 1300-type polyvinyl chloride resin powder, 4 percent of plasticizer-epoxidized soybean oil (ESO), 30 percent of plasticizer-trioctyl trimellitate (TOTM), 4 percent of Ca-Zn complex stabilizer (Ca-Zn), 2 percent of flame retardant-diantimony trioxide (Sb2O3), 8 percent of filling agent-nanoscale calcium carbonate (CaCO3), 0.8 percent of lubricant-polyethylene wax, and 1.2 percent of processing modifier-methacrylic acid polyester (ACR-401). On the premise of guaranteeing the excellent physical performance of the existing polyvinyl chloride plastics, the content of harmful substances thereof is in accordance with the latest rule of EU ROHS instruction and special environmental protection requirements of part top-ranking home-appliance producers in the world on the household power wire.

The invention discloses a phosphoric acid production device by employing a hot method, and belongs to the technical field of energy-saving technologies of phosphoric acid production by employing a hot method. The device comprises a combustion tower, an absorption tower, a dynamic wave demister, a gas-liquid separator and an induced draft fan, wherein the combustion tower is communicated with the inlet in the top of the absorption tower; the absorption tower is connected with the dynamic wave demister; the dynamic wave demister is communicated with the induced draft fan through the gas-liquid separator; meanwhile, the absorption tower is connected with a heat exchanger through an absorption tower circulating pump; the heat exchanger is communicated with the absorption tower to form a loop through a pipeline; and the dynamic wave demister and a demister circulating pump form a loop through a pipeline. According to the device, the resistance of the system is reduced, the dosage of circulating acid and circulating water is lowered, the installed capacity of the system is greatly lowered, energy conservation and consumption reduction are achieved, the production capacity of the system is improved, and the device has the characteristics of low investment cost, small floor area, low power consumption, low production cost, and low coal resource and water resource consumption.

The invention relates to a novel method for rapid composting by combining sludge of different types. The method is realized by three main steps, namely mixed blending, aerobic fermentation and discharging and storing. According to the method, the aerobic composting is realized by combining sludge from urban sewage treatment plants, sludge from wastewater treatment plants of beer enterprises and furfural residue discharged by furfural enterprises and particularly parameters of initial composting are adjusted by using the characteristics of different sludge and acidic furfural residue. The novel method has the advantages of reducing the ecological environment risk, increasing nutritive substances of composting products, reducing the cost of the composting, realizing rapid composting without adding extra microbe consortium and the like.

The invention discloses a method for utilizing bamboo forest waste to product edible mushrooms. The method comprises the steps of choosing a strain mushroom, separating and purifying a strain, and conducting preparation to obtain a mother strain; preparing a mother strain culture medium, and inoculating the mother strain for culture without bacteria; conducting original strain culture; conducting cultivated strain culture; conducting spawn running period management; conducting mushroom producing period management; harvesting. The culture medium of the cultivated strain is obtained through preparation utilizing the bamboo forest waste. According to the method, the bamboo forest waste is utilized to produce the edible mushrooms, not only are bamboo forest resources fully utilized, but also the production cost of the edible mushrooms is lowered; meanwhile, edible mushroom cultivation waste materials can be converted into an organic fertilizer, the problem that the bamboo forest waste pollutes the environment is effectively solved, and circular and progressive development of bamboo industry economy is achieved.

The invention belongs to the technical field of a paddy planting fertilizer and specifically relates to a selenium-rich cadmium-reducing leaf fertilizer special for paddy. The selenium-rich cadmium-reducing leaf fertilizer special for paddy is composed of citric acid monohydrate, sodium selenite, urea, potassium chloride, monopotassium phosphate, soluble microelement compound, momordica grosvenori and herb of alligator alternanthera. The leaf fertilizer can increase the absorbing conversion rate of the paddy for selenium, has an excellent cadmium-impeding performance, is rich in nutrition and is easily absorbed. After the fertilizer is applied to the paddy, the selenium-rich cadmium-reducing efficiency of the leaf fertilizer is higher, the effect is stable and the yield of the paddy is high.

The invention discloses a rubber material for agriculture vehicle tires. The rubber material is prepared from the following raw materials in parts by weight: 40-50 parts of natural rubber, 10-14 parts of epoxy natural rubber, 15-20 parts of silicon dioxide, 2-4 parts of a silane coupling agent, 20-30 parts of brominated butyl rubber, 20-30 parts of superfine glass bead, 30-40 parts of carbon black N660, 20-30 parts of light calcium carbonate, 1-2 parts of tetramethyl thiuram disulfide, 1-2 parts of diisopropylbenzene peroxide, 2-3 parts of N-cyclohexyl-2-benzothiazole sulfonamide, 2-4 parts of zinc oxide, 1-2 parts of an accelerant DM, 0.5-1.0 part of an accelerant CZ, 1-2 parts of N-phenyl-N'-(1,3-dimethyl)-p-phenylenediamine, 1-2 parts of 2,2'-methylene-bi(4-methyl-6-tertiary butyl phenol), 1-2 parts of petroleum oil, 2-5 parts of stearic acid, 1-2 parts of protecting wax OK5194, 5-6 parts of rubber tackifying resin A-90, 5-8 parts of antimonous oxide, 5-10 parts of molybdenum trioxide and 20-30 parts of aluminium hydroxide.

The invention discloses a treating and recycling method of tail gas generating in sulfonated naphthaldehyde water reducing agent production and special equipment thereof. The method comprises the steps of: a, condensation; b, neutralization; c, distillation; and d, recovery of condensed and uncollected gas after spraying. The equipment comprises an intake pipe and an air outlet, both of which are connected with an outlet of tail gas generating in the sulfonated naphthaldehyde water reducing agent production, wherein a condensation kettle and a spray tower are sequentially connected between the intake pipe and the air outlet, the condensation kettle is sequentially connected with a recovery liquid bath and a distillation kettle through a pipeline, the spray tower is communicated with a first regulating tank by a pipeline, and the distillation kettle is communicated with a second regulating tank by a pipeline. The invention more completely processes harmful materials in the tail gas, basically eliminates naphthalene and acidic harmful gases, and reduces the environment pollution caused by the tail gas; the recycled liquid can be reused in the sulfonated naphthaldehyde water reducing agent production, the recovery rate of the tail gas is higher, and the cost of the sulfonated naphthaldehyde water reducing agent production is further reduced.

The invention relates to a health staple food capable of reducing postprandial blood sugar, and also relates to a preparation method of the health staple food and its application in reducing blood sugar. The health staple food with a low glycemic index comprises, by weight, 51-61% of rice, 16-26% of peanut kernel, and 18-28% of peeled mung bean. With organic food as the raw material, the health staple food of the invention is totally prepared with a physical processing method, without any harmful components added. No natural nutritious component in the raw material can be damaged. As a pollution-free green food, the health staple food of the invention integrates nutrition, diseases prevention and disease curing, thus ushering in the application prospect of coarse cereal food. And the application value of coarse cereals is enhanced, with remarkable economic benefit and social benefit. With a low glycemic index, the integrated staple food provided in the invention plays a role in reducing postprandial blood sugar, reducing glycated hemoglobin, and has certain effect on fat-reducing, thus being significant to diabetic patients.

The invention discloses an environmental-friendly waterborne coating for building inner wall decoration. The environmental-friendly waterborne coating is prepared from the raw materials in parts by weight: 20-40 parts of deionized water, 0.3-0.5 part of cellulose, 0.5-1.0 part of a wetting dispersant, 0.1-0.3 part of a defoamer, 0.1-0.2 part of a pH regulator, 2-8 parts of titanium dioxide, 5-8 parts of kaolin, 10-15 parts of light calcium carbonate, 5-10 parts of talc, 15-25 parts of heavy calcium carbonate, 8-12 parts of acrylic emulsion, 0.1-0.5 part of a fungicide, 1-2 parts of propanediol, 0.5-1.0 part of a film-forming additive and 0.3-0.5 part of a thickener. The environmental-friendly waterborne coating has the characteristics of good coating effect, low harmful matter content, soft smell, low production cost, good stability and long service life.

The invention relates to an efficient incinerator. A primary combustion chamber and a secondary combustion chamber are arranged at the back end of a furnace chamber; a check valve is arranged between the primary combustion chamber and the secondary combustion chamber; an air pipe is arranged in the center of an inner cavity of a furnace shell, enters the furnace chamber from the front end of the furnace shell and penetrates through the primary combustion chamber and the secondary combustion chamber; a first air inlet is formed in the pipe wall of the air pipe in the primary combustion chamber; a second air inlet is formed in the pipe wall of the air pipe in the secondary combustion chamber; the secondary combustion chamber is communicated with the furnace chamber through the check valve; a waste gas pipe enters the furnace chamber from the front end of the furnace shell, is communicated with the primary combustion chamber, is in a spiral shape and is arranged outsides the air pipe; and an exhaust hole is formed in the front end of the furnace shell. According to the efficient incinerator disclosed by the invention, with the arrangement of two combustion chambers, waste gas is fully combusted, so that content of harmful substances in the exhausted gas is lowered, and environmental pollution is reduced; and gas after being combusted flows through the exterior of the air pipe and the waste gas pipe, so that the waste gas and the air are preheated, the waste is avoided, and the cost is saved.

The invention relates to an organic and inorganic compound fertilizer applied to vegetable production, in particular to a quick-dissolving fertilizer and a preparation method thereof, wherein the quick-dissolving fertilizer comprises the following components in content by weight: 10-50 percent of ammonium nitro-humate, 0-40 percent of urea, 0-10 percent of ammonium nitrate or ammonium sulfate, 0-35 percent of monoammonium phosphate, 0-20 percent of potassium sulfate, 0-5 percent of magnesium sulfate, 0.5-1 percent of zinc sulfate and 0.3-0.8 percent of borax. The fertilizer disclosed by the invention has the effects of improving the structure and texture of soil, improving the soil fertility, improving the ventilation property and the water-retaining property, promoting the propagation and the growth of beneficial microorganisms, improving the stress resistance of crops and enhancing the drought-resisting (water-logging-resisting), cold-resisting and disease-resisting capabilities; and the quick-dissolving fertilizer is an ideal fertilizer for the production base of pollution-free foods.