81results about How to "Improve secondary pollution" patented technology

The invention relates to a method for removing cyanogen-containing waste gas. A catalytic removal reaction is carried out on cyanogen-containing waste gas by using a transition metal supported mesoporous molecular sieve catalyst, wherein a mesoporous molecular sieve carrier is MCM-41, MCM-48, SBA-15, SBA-16, KIT-5 or KIT-6; a transition metal active component is one or more of Cu, Co, Cr, Mn, Ag or V; and the mass ratio of the carrier to the transition metal component is 1;(0.02-0.07). The method comprises the following steps: placing the molecular sieve catalyst in a fixed bed quartz reactor; introducing a mixed gas of the cyanogens-containing waste gas, oxygen and nitrogen into a reaction furnace at the space speed of 17000-24000h<-1> at normal pressure under the condition that the temperature of the reaction furnace is raised to 350-650 DEG; and removing the waste gas through catalytic combustion. The prepared catalyst is used for inspecting the selective catalytic combustion of the cyanogens-containing waste gas, has the characteristics of low combustion starting temperature and high N2 selectivity, and is suitable for efficient purification of the cyanogen-containing waste gas.

The invention discloses a microbial bacterium agent for degrading Chinese kitchen refuses, which contains the components by mass ratio: protein degrading bacteria: starch degrading bacteria: fat degrading bacteria: cellulose degrading bacteria= (1-2):(1-2): (1-2):(2-3). Simultaneously, the invention further discloses a preparing method of the microbial bacterium agent. Aiming at components of refuses in domestic kitchens, the corresponding microbial bacteria are adopted for gradual degrading, finally the purpose of completely degrading the refuses is achieved, not thorough degrading and long time consumption of the traditional land filling mode and large secondary pollution and high energy consumption of the burning mode are avoided, and the microbial bacterium agent for degrading Chinese kitchen refuses and the preparing method of the microbial bacterium agent can meet the present low carbon, environmental protection and energy saving requirements.

A purifying system for multi-phase photocatalysis treatment of waste gases relates to a purifying system for titanium dioxide photocatalysis degradation treatment of the waste gases. The purifying system can be a filling type waste gas purifying system and a spraying type waste gas purifying system and mainly comprises a blower, a waste gas disperser, a reaction chamber, an ultraviolet light tube, a nano titanium dioxide suspension and the like. The purifying system provided by the invention has the advantages as follows: the structure is simple, the use is flexible and convenient, various organic waste gases or reducing waste gases can be treated, and suitability for treatment of various industrial waste gases is achieved; the waste gas treatment is complete, the purifying rate is high, the secondary pollution problem is avoided, and environmental protection is facilitated; and the applicability is high, and the popularization and the application are convenient. The purifying system provided by the invention can be extensively applied to treatment of various industrial waste gases in large, medium-size and small-sized factories and is an ideal purifying system for gas-liquid-solid multi-phase photocatalysis treatment of the waste gases.

The invention relates to a method for transplanting and maintaining a finished printed circuit board product with multiple types mainly for a multi-type finished printed circuit board product with a bad printed circuit board slice which can be recovered into a good product through a serial processing and maintenance method. The method comprises the following steps: removing the bad printed circuit board slice so as to form a through space joined with a side board and milling combination parts containing a first combination part and a second combination part on the side board; cutting a good printed circuit board slice which can be accommodated in the through space of the finished printed circuit board product and reserving a joint pin which is closely connected with the first combination part and corresponds to the second combination part at intervals on the periphery; sticking an adhesive tape at the bottom of the joint part of the finished printed circuit product; transplanting the cut good printed circuit board slice in the through space of the finished printed circuit board product and closely connecting the joint pin with the first combination part of the side board; filling glue in an adhesive groove formed between the joint pin and the second combination part of the side board of the transplanted good printed circuit board slice and solidifying the filled glue. A good product can be recovered by the method so as to achieve the purposes of improving the utilization rate, reducing material waste, reducing the production cost and meeting the requirement of environmental protection.

The invention relates to a poultry waste deodorization method and the application thereof. The invention is characterized in that: firstly, peroxidase solution of 0.5U/mL to 1.5U/mL and hydrogen peroxide solution of 1 to 4 percent is made up, and the peroxidase solution is sprayed on the poultry waste (spraying 3mL for each liter of waste), and then the hydrogen peroxide solution with the same volume is sprayed, or calcium superoxide powder of 75 percent (spraying 0.3 to 0.5 g for each liter) is sprayed. Using the principle that the peroxidase ensures that the aromaticity compound is catalyzed and oxidized to free radical to be decomposed and eliminated by using peroxide or calcium superoxide as an electron acceptor in the range of having wider temperature, PH value, pollutant concentration and salinity, the bad smelly produced by poultry waste in a poultry cultivation farm is eliminated. The deodorization method is simple without any complex facility, and any staff and device are not needed to be increased having no investment cost and having low running cost. The deodorization effect is obvious and can last for a long time, and secondary pollution can not be caused. The invention has application prospect in the meager profit industry of livestock breeding.

The invention discloses a heavy metal contaminated soil degradation harmless treatment method which comprises the following steps: S1, detecting and analyzing heavy metal contaminated soil, and determining the dosage of a heavy metal contaminated soil degradation repairing agent; S2, preparing the heavy metal contaminated soil degradation repairing agent; S3, leaching; S4, applying the heavy metal contaminated soil degradation repairing agent, and performing ploughing and mixing; S5, planting plants which are suitable for local growth and have enrichment capacity; and S6, detecting until the heavy metal content in the soil reaches the safety standard. Harmless treatment of the heavy metal contaminated soil is achieved, and the requirements of resource utilization, soil replacement and landfill are met; the technology application range is wide, and the method is suitable for remediation of various soils contaminated byheavy metals,including chromium, hexavalent chromium, lead, zinc, copper, chromium, nickel, mercury, arsenic and the like; the technical operation is simple and convenient, the repairing time is short, the capacity increase is less, secondary pollution is avoided, and the cost is lower; and the resource utilization of the polluted soil can be realized, and the repaired soil is suitable for various purposes.

The invention provides multiple-effect compound fertilizer for repairing cadmium soil pollution. The multiple-effect compound fertilizer comprises nitrogen, phosphorus and kalium nutritious components, rare earth element nitrate for agricultural use, waste catalyst agents, Chinese herbal medicine, humic acid mineral powder, sepiolite, plant ash, kaolin and zeolite components, wherein the rare earth element nitrate for agricultural use, the waste catalyst agents, the Chinese herbal medicine, the humic acid mineral powder, the sepiolite, the plant ash, the kaolin and the zeolite components are used according to a proper ratio. After the compound fertilizer is applied to soil polluted by cadmium, the cadmium in the soil is effectively passivated and fixed through the synergistic effect of the components while the polluted soil is effectively repaired, the activity of cadmium in the soil is remarkably lowered, absorption of cadmium by crops is lowered, and thus the content of cadmium in the crops is lowered remarkably. Complex improver has good stability and environment-friendly performance and is free of secondary pollution and low in cost, and large-area popularization is easily implemented; when the fertilizer is applied to soil polluted by cadmium, the application amount is only 10-200 kg/hm<2>, and the content of cadmium in the crops can be lowered remarkably and meets the national food safety standard.

The invention discloses a Pr<3+>:Y2SiO5-TiO2-ACF visible-light response type photocatalytic composite membrane and a preparation method thereof. The composite membrane is prepared by loading nano-TiO2 doped with Pr<3+>:Y2SiO5 to the surface of an activated carbon fiber. The composite membrane can solve the separating and recycling problems of a catalyst obtained after pollutant treatment and also can reuse the catalyst, and meanwhile a substrate enrichment environment can be generated on the surface of TiO2 through the high adsorption property of the activated carbon fiber, so that the contact chance of the catalyst and the pollutants is increased; accordingly, the prepared Pr<3+>:Y2SiO5-TiO2 composite material based on the activated carbon fiber carrier can achieve a synergistic effect of adsorption and photocatalysis, improve the pollutant removing efficiency and particularly achieves a good effect when the composite material is used for visible-light catalytic degradation on methylene blue.

The invention discloses a pretreatment device and a soil in-situ remediation system, relates to the technical field of soil remediation and is designed for solving the problems of secondary pollutionand non-ideal remediation effect in the existing soil remediation process. The pretreatment device comprises a closed chamber, a crushing and screening device which is arranged in the closed chamber and a waste gas treatment device; the crushing and screening device is fixedly provided with a first blower; and the waste gas treatment device is used for treating gas in the closed chamber and exhausting the gas out of the closed chamber. The soil in-situ remediation system comprises the pretreatment device, a conveying device, a stirring device and a medicament storage device which provides a medicament for remediating soils into the stirring device, wherein the conveying device, the stirring device and the medicament storage device are arranged in the closed chamber. The pretreatment deviceand the soil system thereof provided by the invention are used for remediating the soils and exhausting the waste gas produced in the remediating process after treating the waste gas.

The invention belongs to the field of environmental protection, and relates to an integrated multifunctional smoke purifying filter element. The integrated multifunctional smoke purifying filter element comprises a component A and a component B, wherein the component A comprises 30 to 55 parts of diatomite, 5 to 8 parts of aluminum powder, 10 to 25 parts of clay, 10 to 18 parts of calcium carbonate, 10 to 30 parts of manganolite, 13 to 33 parts of bitumite, 12 to 16 parts of iron ore, 5 to 11 parts of titanium ore, 1 to 5 parts of nickel powder and palladium powder, and 10 to 2 parts of silica sol; the component B comprises 20 to 30 parts of active carbon, 20 to 30 parts of manganese dioxide, 2 to 6 parts of pore-forming agent, 1 to 2 parts of curing agent, 10 to 20 parts of No. 500 cement, 1 to 2 parts of water impregnating agent and 10 to 18 parts of water. By adopting the integrated multifunctional smoke purifying filter element, different contaminants in the smoke are concentrated in a same container to be crossly treated. By adopting the integrated multifunctional smoke purifying filter element, not only is less investment needed, but also the process is simple; a selective catalytic oxidation neutralization absorption method (SCN method) is used for treating the smoke so as to purify the smoke, and the method also can be named as low-temperature treatment method. A product treated by adopting the method is convenient to recycle, secondary pollution and waste can be avoided, income benefit can be created, and the invested capital can be recovered.

The invention discloses a high temperature-resistant micro-expansive caulking mud and a preparation method thereof. The preparation method comprises the following steps: step 1, dissolving sodium bicarbonate powder in water and taking a saturated solution of the dissolved sodium bicarbonate as an expanding agent; step 2, separately grinding 50 to 60% of bauxitic clay clinker, 20 to 30% of clay, 10 to 20% of fine slag powder and 2 to 6% of alum to respective standard particle size ranges; and step 3, adding the expanding agent solution containing 1 to 3% of sodium bicarbonate into bauxitic clay clinker, clay, fine slag powder and alum and carrying out stirring. With such a technical scheme, defects of secondary pollution, easy falling and high cost of conventional stemming caulking technology are overcome, and the caulking mud provided by the invention has high strength and can meet requirements on caulking of joints of cover plates. The production cost of the caulking mud provided by the invention is 1/3 of the production cost of the stemming, so blast furnace production cost is reduced; moreover, the caulking mud does not cause secondary pollution, thereby substantially promoting environmental protection.

The invention discloses an unloading device matched with a rotary excavating machine. A funnel-shaped body, a vibrating mechanism, a spraying mechanism, a warning mechanism, a first support, a secondsupport and a controller are included; the bottom side of the funnel-shaped body is in contact with or is connected with the first support, and is suspended on the ground under supporting by the firstsupport; pad feet are installed on the bottom side of the first support; the funnel-shaped body is provided with a feeding port or a discharging port; the second support is installed on the inner side of the feeding port; the vibrating mechanism is installed on the outer side of the funnel-shaped body so as to assist waste in a funnel in breaking away from the funnel-shaped body; the spraying mechanism is installed in the feeding port of the funnel-shaped body; and the vibrating mechanism and the warning mechanism are electrically connected with the controller. The unloading device matched with the rotary excavating machine can be used for conveniently achieving recycling of solid waste in a mine.

The invention discloses a comprehensive treatment system for dicamba high-salt-content wastewater. The system comprises a coagulation reaction unit, an air flotation sedimentation unit, a composite filtration unit, a pH adjustment unit, an evaporation crystallization unit, a neutralization unit, a micro-electrolysis unit, and a Fenton reaction unit and a membrane separation unit which communicatethrough a pipeline in sequence. According to the system provided by the invention, a micro-electrolysis reaction device, an MVR evaporator and a Fenton reaction device are adopted together, so that the problem that the dicamba wastewater has a high salt content, thereby having secondary pollution to the receiving environment is improved, and the system not only has the effects of making the wastewater degraded more fully and thoroughly and recovering useful matter, but also has the effects of being capable of reducing energy consumption and reducing operating costs and wastewater treating time.

The invention belongs to the field of catalysts, and relates to preparation and application of a catalyst suitable for treating organic waste gas through low-temperature plasmas. The catalyst is prepared through an impregnation method; and transition metal silver and manganese are mixed, stirred, ultrasonically vibrated, subjected to still standing, dried, roasted and cooled together with an SBA-15 molecular sieve according to a certain proportion, and then the catalyst is prepared. According to the prepared catalyst, the VOC degrading efficiency can be improved greatly, generation of harmfulby-products is restrained, the disadvantages that as for treating of the organic waste gas through the low-temperature plasmas, the energy utilization rate is low, and the treating effect is poor canfurther be overcome, meanwhile, energy consumption is lowered, and secondary pollution is reduced.