116results about How to "Effective pollution control" patented technology

The invention discloses a technological method for producing inorganic fibers from red mud and belongs to the field of comprehensive utilization of the red mud. According to the technological method, a curing agent and an acidity coefficient modifier are added to the red mud, a mixture and coke are molten at the high temperature, element resources including Si, Ca, Fe, Al, Na and Mg in the red mud, the curing agent and the acidity coefficient modifier are sufficiently utilized, the red mud is taken as a main material for production of the inorganic fibers, the ratio of the dosage of the red mud can be higher than 70%, red mud pollution is effectively treated, the produced inorganic fibers reach the level of rock wool, and economic, social and environmental benefits are remarkable. The technology is simple, the production cost is low, and large-scale production of the red mud for comprehensive utilization can be realized.

The invention discloses a method and a device for using small-aperture spiral wound ultrafiltration membranes to treat papermaking wastewater. The main process includes coagulation efficient air floatation and small-aperture ultrafiltration system which comprises a water collection tank (1), an efficient air floating system (2), a small-aperture ultrafiltration system (3), a water recycling tank (4) and a concentrated water tank (5). The efficient air floating system comprises a coagulation portion and an air floatation portion. The method and the device for using small-aperture spiral wound ultrafiltration membranes to treat papermaking wastewater has the advantages that most CODCr (chemical oxygen demand), suspended matters and fibers can be removed by means of the coagulation efficient air floatation, the small-aperture spiral wound ultrafiltration membrane system using a linear water inlet runner net can effectively control membrane contamination, and the membrane molecular weight cutoff is 3000-10000Da. Quality of discharged water of the whole system is high and stable, turbidity of the discharged water is smaller than or equal to 3NTU (number of transfer units), the suspended matters can be removed completely, the discharged water is odorless in long-time standing, concentrated solution can be used as slurry to be reused after further treatment, and permeate liquid can be directly used as production circulating water for reuse. The method and the device for using small-aperture spiral wound ultrafiltration membranes to treat papermaking wastewater are used for treatment and recycling of papermaking wastewater, and worthy of wide popularization and application to the market.

The invention discloses double-layered coated water-retention slow-released fertilizer capable of releasing negative ions. The double-layered coated water-retention slow-released fertilizer is prepared from the following raw materials in parts by weight: 55 to 70 parts of urea, 20 to 30 parts of ammonium phosphate, 30 to 40 parts of acrylic acid, 14 to 25 parts of wheat straw, a proper amount of distilled water, 2 to 7 parts of potassium hydroxide, 0.5 to 2 parts of sodium borohydride, 12 to 16 parts of humic acid, 5 to 10 parts of anhydrous sodium sulfite, 5 to 10 parts of a formaldehyde solution, 3 to 7 parts of ammonium persulfate, 1 to 3 parts of N,N'-methylene-bisacrylamide, 10 to 16 parts of sodium alginate, a proper amount of a 5 percent calcium chloride water solution, 2 to 4 parts of paraffin wax, 4 to 8 parts of tourmaline powder, 2 to 5 parts of inorganic clay, 2 to 4 parts of nano negative ion powder, 1 to 3 parts of red pine polyphenol and a proper amount of a 10 percent sodium hydroxide solution. According to the double-layered coated water-retention slow-released fertilizer, the humic acid is subjected to modification treatment so that the water solubility is improved; the fertilizer effect of the urea and the utilization rate of nitrogen are improved; the water absorption and water retention properties, and salt resistance of the slow-released fertilizer are improved.

The invention discloses a comprehensive fresh keeping method of chilled chickens, and relates to the technical field of the food processing industry and food irradiation. The method sequentially comprises the following steps: quarantined living chicken bloodletting, disinfection flushing, hair scalding, hair picking, cleaning, eviscerating, chilled chicken pre-cooling disinfection, fresh keeping treatment, air cooling, anti-oxidation treatment, packaging, irradiation and constant temperature storage. The disinfection flushing step is carried out to prevent cross infection of microorganisms in a high-temperature immersion tank; foams in an immersion scalding tank are timely removed in the hair scalding step in order to effectively aggregation of bacteria; and air cooling timely carried out after the fresh keeping treatment is a key process for reducing the initial bacterium quantity of the chilled chickens.

The vibration bed membrane separator is fixed on the vibration bed to make the material implement vertical reciprocating movement passing through membrane direction with vibration bed, the invented advantage is lies in that the vibration bed can effectively control pollution of membrane surface of membrane separator, can make membrane separator high-effectively stable work for a long period. It is favorable for concentration of high concentration material, and can expand working range of membrane separator.

The invention discloses a method for preparing activated carbon by using a papermaking black liquor as an active agent. The method comprises the steps of black liquor acidification, caustization, carbonizing of wood chips and activization. According to the method, lignose in the papermaking black liquor is recycled; as the black liquor subjected to acidification and caustization is used as the active agent for preparing the activated carbon, the pollution of the black liquor is efficiently controlled; the method has remarkable economical and social benefits.

The invention discloses a method for removing lead in a water body by using magnetic pig manure biochar. The method comprises the steps as follows: magnetic pig manure biochar is added to the lead-containing water body, the pH value of the water body is controlled between 2 and 7, and constant-temperature vibrating treatment is performed to adsorb lead in the water body. The magnetic pig manure biochar is prepared in the following steps: (1) pretreated pig manure is subjected to high-temperature pyrolysis in nitrogen and pig manure biochar is obtained; (2) a pig manure biochar dispersion liquid is prepared, a ferric iron salt solution and a ferrous iron salt solution are mixed and stirred, and an iron salt mixed solution is prepared; (3) the pig manure biochar dispersion liquid and the iron salt mixed solution are mixed and stirred, the pH value is adjusted, boiling, filtration, washing and drying are performed, and the magnetic pig manure biochar is obtained. The method has the advantages of being simple to operate, low in cost, capable of quickly and efficiently adsorbing lead, easy in separation and recovery, reusable, environmentally friendly and the like.

The invention discloses a washing method for a reverse osmosis membrance. The method comprises the steps that the reverse osmosis membrance is placed in a washing box for standing, preimpregnation andcirculating pickling with an acid washing agent, and is subjected to circulating water washing, soaking, circular alkali washing, fungicide spraying and washing, and the method aims to solve the problems that sediments and the residual organic flocculant in liquid form an insoluble polymer so as to greatly affect the effect of reverse osmosis treatment.

The invention relates to a method for preventing and treating the regional area pollution of farmland farming ditch and pond regions, and belongs to the field of environmental governance. The method is characterized in that a plurality of farmland ditches directly discharging into the main water discharge ditch are selected to carry out farmland ecological ditch construction, wherein the construction is divided into ditch transformation and plant construction; a pond at any corner position in the same farmland region is selected and transformed into the ecological pond so as to make the water discharged from the farmland be directly discharged into the pond, and one side of the pond is provided with the water discharge port; and the heavy pollution section in the main water discharge ditch and the water discharge portion section for making the sub-water discharge ditch discharge into the main water discharge ditch are provided with filtration boxes for filtering the farmland wastewater, and the filtration boxes are fixed on the bottom of the ditch. According to the present invention, the existing farmland water discharge facilities and the ponds are utilized, the effective pollution preventing and reducing measures are transformed and constructed, the nitrogen content and the phosphorus content in the water discharged from the farmland are significantly reduced, the pollution of the farmland regional area pollution on the river channels and the lakes can be effectively controlled, the eutrophication risk can be reduced, the good ecological cycle system is formed while the regional water recycling is achieved, and the economic benefits of the farmland are improved.

The invention discloses a method for preventing and controlling agricultural non-point source pollution in hilly and mountainous areas by utilizing nitrogen and phosphorus intercepting ditches. This method is based on the distribution of farmland in hilly and mountainous areas, and according to the slope and elevation of the farmland area, build multi-level interception ditches. The horizontal distance between the two levels of interception ditches is 50 meters. The bottom of the interception ditch is a nitrogen and phosphorus interception layer with a thickness of 0.5 meters, and it is suppressed with a covering soil with a thickness of 0.2 meters. The nitrogen and phosphorus interception layer is formed by mixing straw, sawdust and soil with a mass ratio of 1:3:1. This method can Remove 30% of the nitrogen content and 25% of the phosphorus content in agricultural non-point source pollution in hilly and mountainous areas, effectively control the non-point source pollution of farmland in hilly areas, and can slow down the soil and water loss of farmland in hilly and mountainous areas. Years can be used as farmland fertilizer, which has good environmental and economic benefits.

A screening method for arid and semi-arid lead and zinc mining area remediation plants comprises the steps of conducting preliminary screening and determination of the remediation plants; conducting field planting and field potting of the remediation plants; rapidly detecting the content of heavy metal in soil through a portable instrument; collecting samples, preparing sample liquids and detecting the sample liquids through a traditional chemical method in a laboratory; and determining the screened remediation plants. By the adoption of the screening method for the arid and semi-arid lead and zinc mining area remediation plants, the field potting experiment and the field control experiment are combined to ensure that the growth environments of the plants in an experimental group and a control group are similar; and the plants which are high in drought resistance, exuberant in vitality and short in growth cycle, belong to the same family and genus with the existing remediation plants and are suitable for local plantation are selected, the content of heavy metal in surface soil is rapidly detected through the portable heavy metal content determining instrument, and therefore the screening period of the remediation plants is greatly shortened. The screening method for the arid and semi-arid lead and zinc mining area remediation plants has the beneficial effects of being high in controllability and comparability, short in screening period and high in practical application value. Through the screening method, the arid and semi-arid lead and zinc mining area heavy metal remediation plants can be efficiently screened out, so that soil heavy metal pollution in the area and similar areas is effectively controlled and soil purification is achieved.

The invention discloses a method for extracting pectin from tobacco waste by using ultrasonic and organic acid, which comprises the following steps: drying the tobacco waste, pulverizing into powder, and screening; preparing an organic acid solution from water and citric acid crystal, regulating the pH value of the solution to 0.5-2.5, and adding the tobacco waste powder; treating in an ultrasonic instrument with the ultrasonic power of 500-1000W for 30-60 minutes to obtain a turbid liquid, carrying out vacuum filtration, removing the filter residue to obtain a pectin crude extracting solution, adding activated carbon for decolorization, and cooling for later use; and washing with anhydrous ethanol to obtain white pectin, carrying out vacuum drying on the white pectin to obtain offwhite pectin, and pulverizing to obtain the product. The method has the advantages of higher pectin yield and controllable extraction process, and is milder and more effective than the traditional pectin extraction process by using inorganic acid.

The invention discloses a method for preparing single crystal perovskite type oxide and application thereof. The method comprises the following steps of: using NaOH as a mineralizer, slowly adding the NaOH solution into solution of metallic salt formed by MnO<4->, Mn<2+>, La<3+> and Sr<2>+ dropwise, and continuously mechanically stirring the mixed solution; placing the mixed solution in ultrasonic wave for ultrasonic dispersion, placing the mixed solution in a reaction kettle to perform a hydrothermal reaction at the temperature of between 220 and 270 DEG C, and naturally cooling the mixed solution to the room temperature; and centrifuging the obtained products by deionized water and absolute ethyl alcohol for three times respectively, drying the products at the temperature of 80 DEG C for 24 hours, and grinding the products to obtain the cube-shaped single crystal perovskite type oxide of La0.5Sr0.5MnO3-delta. The catalyst of the single crystal perovskite type oxide has the advantages of high low-temperature catalytic activity, stable structure, high thermal-shock resistance and no high-temperature roasting; and the single crystal perovskite type oxide is also suitable for the treatment of the low-concentration toluene and the effective treatment of environmental pollution, particularly the catalytic combustion of the toluene at a high space velocity.

The invention relates to an advanced treatment and reuse method of high-temperature nitrochlorobenzene wastewater, and concretely relates to a method for treating high-temperature nitrochlorobenzene wastewater by utilizing a membrane separation technology. The method comprises the following steps: 1, directly filtering water obtained after the oxidation-gravity settlement of nitrochlorobenzene wastewater by an ultrafilter membrane filtration system; 2, carrying out primary pressurization of water obtained after the ultrafilter membrane filtration in step 1, and directly conveying the pressurized water to a primary reverse osmosis membrane system for filtration; and 3, carrying out secondary pressurization of water filtered in step 2, and directly conveying the filtered water obtained in step 2 to a secondary reverse osmosis membrane system for filtration, wherein water obtained after the secondary reverse osmosis is process reuse water. The finally obtained treated nitrochlorobenzene wastewater can satisfy quality requirements of make-up water for middle and low pressure boilers.

The invention discloses a ventilating device. The ventilating device comprises an air supply fan, an air supply pipe, an exhaust fan and an exhaust pipe. The ventilating device is characterized by further comprising an air-supply static pressure box and an exhaust static pressure box, wherein an air outlet of the air supply fan is connected with an air inlet of the air-supply static pressure box by the air supply pipe; and an air outlet of the exhaust static pressure box is connected with an air inlet of the exhaust fan by the exhaust pipe. The ventilating device disclosed by the invention has the advantages that the structure is simple, the cost is low, the industrial pollution is controlled by utilizing air jetting, the control range of pollutants is large, the capture efficiency is high, the purposes of effectively controlling industrial pollution and protecting the occupational health are achieved, and simultaneously the energy is furthest saved.

The invention belongs to the field of environment-friendly equipment and in particular relates to an electrostatic dust collection system of a movable tripper car. The system comprises a power supply part, a movable tripper car (1), a head dust collection hood (2), a charging conduit (3), a silo seal hood (5) and a material conveying mechanism (4), wherein the material conveying mechanism (4) is arranged on the movable tripper car (1); the head dust collection hood (2) is fixedly connected with the charging conduit (3); the discharge end of the charging conduit (3) is communicated with the silo feeding end; a dust airflow return channel (6) is arranged between the silo seal hood (5) and the charging conduit (3); the port of the dust airflow return channel (6) is communicated with a silo and the charging conduit (3) respectively; an electrostatic dust collection terminal is arranged in the silo seal hood (5); and the signal output end of the power supply part is connected with the signal input end of the electrostatic dust collection terminal. The system can be configured in multiple points, has an ideal dust collection effect, and can be automatically controlled.

The invention discloses a method for planting gastrodia elata in a greenhouse. The method comprises the steps of mushroom stick making, site building, greenhouse building, gastrodia elata cultivation and planting management. The greenhouse and a cement pit are built on an open field for gastrodia elata cultivation, site selection flexibility is realized, and greenhouse building permanency and cement pit building practicality are realized. By the adoption of the method, standardized cultivation can be achieved, land resources can be effectively utilized, and manpower and materials are saved; by planting gastrodia elata in the cement pit, complete isolation of honey mushroom sticks and soil can be achieved, soil contamination is effectively controlled, influences of soil heavy metal and pesticide residues on mushroom sticks are avoided, and therefore the greenhouse can be used permanently. Gastrodia elata cultivated with the method is low in contamination rate, high in yield and low in cost. By adopting an anti-drop film and a heat insulation plastic film for covering, heat insulation can be achieved, uniform scattered light is available for the interior of the greenhouse, and gastrodia elata and mushroom sticks can grow well.

The invention relates to a lampblack depuration machine comprising a housing. A water container is arranged in the housing. The water container is connected to a blower through a pipe. The blower is connected to a lampblack hood through a pipe. The water container is connected to a water inlet pipe and a water overflow pipe which is positioned above the water inlet pipe. A waste discharge pipe is arranged on the bottom of the water container. An exhaust vent is arranged on the upper part of the water container. With the lampblack depuration machine provided by the invention, environment pollution caused by lampblack and dust is solved, and harmful gas zero discharge is realized. The lampblack depuration machine can be widely applied in domestic kitchens and catering operating rooms of restaurants, hotels, and canteens. The lampblack depuration machine can also be used in factories and hospital infectious disease areas.

The invention discloses an oil leakage protection device for a centrifugal machine. The oil leakage protection device comprises a water collection box, a liquid level controller, a control unit and an oil path cut-off component, wherein the water collection box is connected with a water outlet of the centrifugal machine; the liquid level controller is arranged in the water collection box; the control unit is provided with an oil leakage protection module; the liquid level controller is connected with the oil leakage protection module in the control unit; and on and off of the oil path cut-off component are controlled by the control unit. The oil leakage protection device has the beneficial effects that the economic loss and the environmental pollution caused by oil leakage of the centrifugal machine can be effectively controlled, operation personnel are timely reminded; and long-term high-efficiency operation of the centrifugal machine is guaranteed.