59results about How to "No secondary pollution will be introduced" patented technology

The invention provides a high-efficiency environmental-friendly dust suppressant as well as a preparation method and application thereof. The high-efficiency environmental-friendly dust suppressant disclosed by the invention solves the problems that the conventional product is single in function, secondary pollution is introduced and the like, has wide application and is particularly applicable to roads with less dust particles, for example, the dust suppressant is used for capturing and adsorbing TSP (Total Suspended Particulates), PM10, PM2.5 and nitric oxides. The high-efficiency environmental-friendly dust suppressant disclosed by the invention is mainly prepared by mixing the following components by weight: 0.1-10% of polyvinyl alcohol, 0.1-5% of sodium silicate, 10-50% of glycerin, 0.01-5% of a surfactant, 0-5% of a preservative, and the balance of water.

The invention provides an inorganic-organic composite bentonite material, and a preparation method and an application of the inorganic-organic composite bentonite material. The inorganic-organic composite bentonite material is prepared through the following step: reacting Al-pillared bentonite with chitosan quaternary ammonium salt, the mass ratio of which is 1:0.1-0.5, at 50-90 DEG C for 3-8 h to prepare chitosan quaternary ammonium salt-Al-pillared bentonite. Through inorganic modification, the specific surface area, pore volume, and stability of bentonite are increased, and further through organic modification, the bentonite is provided with a relatively high organic carbon content, and the ability of adsorbing organic matters of the bentonite is increased. The inorganic-organic composite bentonite material provided in the invention can be used for water treatment, has characteristics of high efficiency and safety, and is a novel environment-friendly bentonite material free of secondary pollution.

The invention discloses a net membrane with oily sewage purification capability and a preparation method and application thereof. The oily sewage purification net membrane is an A / B double-layer composite net membrane, wherein the A layer of net membrane is formed by depositing a TiO2 coating on the net wire surface of a fabric net; and the B layer of net membrane is arranged on the surface of the A layer of net membrane and provided with a photodegradable hydrophobic modifier layer. The oily sewage purification net membrane can be used for simultaneously implementing oil-water separation of oily sewage and degradation of soluble pollutants. The net membrane has super-hydrophobic and super-oleophyllic properties in air, the contact angle between the net membrane and water in the air is more than 150 degrees, and the net membrane has good photo-catalytic property under ultraviolet. The net membrane can be applied to purification, chemical separation, environmental protection and the like of the oily sewage. The net membrane for sewage purification has the advantages of good separation effect, high purification efficiency, low cost, low energy consumption, convenience and the like.

The invention provides a device and a method for preparing high-purity chalcogenide glass. By means of the device and the method, the technical problem that the chalcogenide glass prepared in the prior art is high in purity content, large in absorbing consumption, complex in purification and the like. The device comprises a first vertical pipe, a second vertical pipe, a connection pipe and a third vertical pipe, wherein the upper end of the third vertical pipe is the only opening of the device, the lower ends of the first vertical pipe and the second vertical pipe are both enclosed, and the upper ends of the first vertical pipe and the second vertical pipe are communicated with each other through the connection pipe; the connection pipe is perpendicular to the first vertical pipe and the second vertical pipe, or an included angle formed by the connection pipe and the first vertical pipe is an obtuse angle; and the lower end of the third vertical pipe is communicated with the connection pipe. By means of a process for repeatedly distilling chalcogenide simple substance raw materials, water impurities containted in the chalcogenide simple substance raw materials is eliminated, and the method and the device are simple in process, no secondary pollution can be guided in during preparation, and impurity absorbing of the chalcogenide glass is remarkably eliminated.

The invention relates to a repairing method of chromium polluted soil. The repairing method is characterized by comprising the following steps: (1) smashing the chromium polluted soil to a granularity of 1-2 cm; (2) adding aluminum sulfate and ferric subsulfate into the chromium polluted soil, blending uniformly, wherein aluminum sulfate accounts for 14-18% by mass of the chromium polluted soil, and ferric subsulfate accounts for 6-10% by mass of the chromium polluted soil; (3) adding water, stirring the chromium polluted soil mixture, immersing for 2 days, filtering and collecting the filtrate, wherein the mass ratio of water to the chromium polluted soil mixture is 1.5:1-2:1, drying the obtained soil after filtration and getting repaired soil; (4) adding sodium hydroxide or potassium hydroxide into the collected filtrate, adjusting pH of the filtrate to 10-11, adding a flocculating agent to deposit chromium in the filtrate at the same time, standing and filtering out chromium in the filtrate, and the filtrated liquid is used as the water required in step (3). The beneficial effects of the repairing method comprise raising repair rate, preventing secondary pollution and maintaining soil matrix.

The invention discloses an immobilized method and application of petroleum degrading bacteria. The method includes the following steps: mixing and pretreating carrier materials of wheat straw, corn straw, wheat bran, leaves and walnut shell activated carbon; inoculating an activated petroleum degrading bacterium seed liquid, and carrying out adsorption culture; and filtering out an upper bacterial suspension under aseptic conditions, rinsing the carrier materials with sterile water, transferring the carrier materials adsorbed with bacteria to a new petroleum degrading bacterium seed liquid, repeating several times to reach saturation of the bacteria adsorbed by the carrier materials, so as to obtain the immobilized particles. The invention uses the natural organic materials and natural inorganic materials as carriers to overcome the defects of the individual usage of inorganic carrier or organic carrier; adsorption method is employed to realize immobilization of petroleum degrading bacteria; and the prepared immobilized petroleum degrading bacteria can be applied to in-situ remediation of petroleum contaminated soil to reach good effect, and is an environmentally friendly product which can be popularized and applied.

The invention discloses a porous cobalt / nickel nanometer granular catalyst and a preparation method thereof. The method comprises the following steps of: firstly reacting alloy nanometer grains containing an aluminum element with an alkali liquor to obtain porous metal nanometer grains; and then, separating the porous metal nanometer grains from a reaction solution, repeatedly cleaning until that the washing liquid PH value achieves neutrality, and finally storing the porous metal nanometer grains after cleaning in de-ionized water or an organic solution. By adopting the method for preparing the porous metal nanometer grains disclosed by the invention, the prepared nanometer grains are high in purity, large in specific surface area and uniform in grain fineness distribution; the preparation process is few in procedures and simple in required equipment; and hydrogenation reaction is carried out on the porous nanometer grains, so that the reaction temperature is reduced, the reaction yield is improved, the reaction rate is increased, and meanwhile, the secondary pollution is not inducted.

The invention discloses a method for processing of percolating liquid biochemical membrane for urban daily rubbish after filtering and concentration. The waste water is the concentration liquid trapped by the filtering membrane or reverse osmosis membrane in the rubbish percolating liquid processing. The processing steps contain: passing the pretreated concentrated percolating liquid through the apparatus filled with composite functional absorption resin in the 0.5-5BV / h flux at room temperature, which is followed by neutralization with alkali after water absorbed out and is then discharged, regenerating the above resin with NaOH solution with the desorption agent of 0.5-3.0BV / h. The volume of the concentrated desorption solution is around 1 / 100 of that of the original percolating liquid and the concentrated desorption solution is burnt, buried or comprehensively used while the diluted desorption solution can be circulated for preparing the next batch of desorption agent. The invention is capable of reducing the concentration of CODCr in the concentrated percolating liquid from 6000mg / L or so to 300mg / L or so and finally realizes amount-reduced and innocuous concentrated percolating liquid. The method is characterized in simple processing, big processing amount, and capable of compensating the shortcomings of the current processing techniques of the urban daily rubbish percolating liquid.

The invention discloses an advanced treatment method for biochemical tail water of leachate of municipal household waste. Tail water mainly comes from biochemical effluent from a treatment device of the leachate of the municipal household waste or effluent of simply chemical-physical treated biochemical effluent. The steps of the method are as follows: at normal temperature and under the condition of 0.5 BV / h to10BV / h of flow, pretreated tail water is absorbed by a device filled with adsorbent resins with complex functions or macroporous resin to yield water, so as to be discharged by reaching the mark; the resin is desorbed and regenerated by sodium hydroxide solution, the flow of desorbing agent is 0.5BV / h to 3.0BV / h, desorbing liquid with high concentration is burnt or disposed by other safe disposal methods, and desorbing liquid with low concentration can be used for preparing the next batch of desorbing agent for circular application. The method of the invention can reduce the COD of the tail water to below 100mg / L from about 150mg / L to 500mg / L and can reduce the ion concentration of ammonia nitrogen, total nitrogen and heavy metal to be below first-grade state emission standard. The method of the invention has the advantages of simple technique and large treatment amount, which can make up the shortcomings of the existing treatment technology of leachate of municipal household waste.

This invention discloses a high-efficiency method for adsorbing oil by resin. The method comprises: (1) passing crude oil-containing liquid at 10-40 deg.C and a flex of 2-15 BV / h through an adsorption column filled with oil-adsorbent resin to desorption agent, and condensing to obtain the oil product. The removal rate of the oil is higher than 98%, and the water after adsorption can be used in the next process. When resin NDA-18 is used, the oil-removing performance is stable, and desorption and regenearion are complete. The method has such advantages as simple process, large treatment quantity, high efficiency, high profit and no secondary pollution.

The invention belongs to the field of sewage treatment, in particular relates to a method for removing trace polycyclic aromatic hydrocarbon from water by utilizing the quick adsorption of a polylactic acid-caprolactone (P(LA / CL),7 / 3) electrospinning nanofiber membrane, which comprises the two steps of preparing the electrospinning nanofiber membrane and removing the trace polycyclic aromatic hydrocarbon from the water by utilizing the adsorption of the electrospinning nanofiber membrane, namely preparing the electrospinning nanofiber membrane with excellent adsorption performance from biodegradable polylactic acid-caprolactone (P(LA / CL),7 / 3) serving as a raw material by electrospinning technology, wherein the ratio of polylactic acid to the polycaprolactone during synthesis is 7:3; and reacting the electrospinning nanofiber membrane with mixed solution of polycyclic aromatic hydrocarbon at different concentrations to remove the polycyclic aromatic hydrocarbon from the water through adsorption. Through the method for removing the trace polycyclic aromatic hydrocarbon from the water through quick and efficient adsorption provided by the invention, over 80 percent of polycyclic aromatic hydrocarbon (the concentration range is between 1 and 10 micrograms / liter) can be removed from the water within 20 minutes through adsorption, an adsorbent has the advantages of simple preparation process and easy recycling; and the method has the advantages of easy operation, low cost, high efficiency and time conservation.

The invention discloses a method for preparing a supported type photocatalyst by an ionic imprinting method. The preparation process comprises the following steps: (1) preparing hydroxyapatite powder; (2) preparing TiO2 sol; (3) coating the hydroxyapatite powder with the TiO2 sol to obtain TiO2 / hydroxyapatite; and (4) adding heavy metal ion chitosan liquid to coat TiO2 / hydroxyapatite to obtain the chitosan / TiO2 / hydroxyapatite composite photocatalyst. Degradable chitosan and environment-friendly hydroxyapatite are selected in the aspect of application of raw materials, secondary pollution cannot be caused, and the environment-friendly effect is achieved; and certain heavy metal ions are introduced into the supported type photocatalyst by the ionic imprinting method, and therefore, the sewage treatment effect is improved obviously.

The invention discloses a single-carrier polycyclic aromatic hydrocarbon mixed bacterial agent with low temperature degradation-resistant effect and a preparation method and application thereof. The single-carrier polycyclic aromatic hydrocarbon mixed bacterial agent is prepared from a mixed bacterial agent and a corn cob which is used as a carrier, wherein the mixed bacterial agent is obtained bymixing pseudomonas SDR4 and mortierella alpine JDR4 which are screened from frozen and thawed soil according to a volume ratio of 1:1. The single-carrier polycyclic aromatic hydrocarbon mixed bacterial agent with low temperature degradation-resistant effect has the advantages that the biological activity is good, the cost is low, the preparation technology is simple, the secondary pollution is avoided, the recycling is not needed, the malicious competition, devouring and poisoning to microorganisms by indigenous flora, bacteriophage and toxic matters can be effectively shielded, and the highefficiency can be stably realized in the complicated environment; the effect of restoring the frozen and thawed soil which is polluted by polycyclic aromatic hydrocarbon in cold areas is obvious.

The invention discloses a treating method of tail water membrane filtering condensation fluid in chemical industry park, the steps of which are that the pre-treated membrane filtering condensation fluid goes through a device filled with resinous adsorbent under the common temperature and a flow quantity of 0.5-8BV / h, the absorbed water can be discharged after neutralizing with small capacity of alkali, desorbing and regenerating the resin by natrium hydroxydatum solution with the flow capacity of the desorbing agent is 0.5-3.0BV / h, the high concentration desorbing fluid disposes safely and the low concentration desorbing fluid can be periodically used to preparing next pluralities of desorbing agent. The invention can reduce the COD of the membrane filtering condensation fluid from about 600mg / L to about 80mg / L and finally realizes reducing and harmlessness of the polluted things of the membrane filtering condensation fluid. After desorbing of the resin, the desorbing rate is lager than 96%. The invention has the advantages of simple process, convenient operation, economy and high effective and good practicality without secondary pollution.

The invention discloses a pulped drink food processing machine and a pulped drink food processing method. The pulped drink food processing machine comprises a material supply device, a food processing device, a pulped drink outlet, a rack, a pneumatic device, a supplied material temporary storage device, a communication and control device and a human-machine interface, wherein the material supply device, the food processing device, the supplied material temporary storage device and the human-machine interface are all electrically connected with the communication and control device; the pneumatic device, the supplied material temporary storage device, the human-machine interface and the communication and control device are all mounted on the rack; the material supply device is connected with the supplied material temporary storage device; the supplied material temporary storage device is connected with the food processing device; the supplied material temporary storage device comprises a material storage container and a plurality of valve mechanisms; the valve mechanisms are electrically connected with the communication and control device; the valve mechanisms are fixedly connected to the material storage container and divide the material storage container into a plurality of small cavities. According to the pulped drink food processing machine and the processing method, the container for temporarily storing food materials is provided, so that automatic processing can be realized, and no secondary pollution is caused; pulped drink food can be discharged in delay or in advance, and the automation degree is high.

The invention provides a treatment method of wastewater containing rubber latex. The method comprises a step that the wastewater is frozen and is then thawed. With the method provided by the invention, emulsion breaking can be effectively realized out upon the rubber-latex-containing wastewater with relatively low rubber latex content. With the method, solid substances in opalescent wastewater can be flocculated, water quality can be clarified, and wastewater can be decolorized. Therefore, subsequent wastewater treatment can easily be carried out upon the clarified liquid. No agent is adopted according to the invention, such that no secondary pollution is caused. Therefore, the method is environment-friendly.

The invention discloses a method for the advanced treatment to chemical waste water biochemical tailwater. The method comprises the following steps: under the conditions of normal temperature and the flow quantity of 0.5 to 8BV / h, water is removed from the chemical waste water biochemical tailwater after being pretreated through a device filled with a resin adsorbent, and the water is added with alkali for neutralization and then can be discharged; the resin is desorbed and regenerated with an alkalic desorption agent and an acidic desorption agent, the flow quantity of the desorption agent is 0.5 to 3.0BV / h, advanced treatment is performed to desorption liquid with a high concentration, and desorption liquid with a lower concentration can be used for the preparation of the next batch of desorption agent for circulating and matching. Protocercal tail water COD is 120 to 250 mg / L, the COD can be reduced to below 75 mg / L through treatment, and after the COD adsorbs the resin after being saturated and regenerated through desorption, the desorption ratios are all more than 96 percent, and advanced treatment can be performed to the desorption liquid with the high concentration. With the advantages of simple process, and simple and convenient operation, the method is economic and highly efficient, and has better practicability without introducing secondary pollution.

The invention discloses a gelatin composite adsorbent based technology for high efficiently removing heavy metals in water. A gelatin composite is taken as the adsorbent. The desulfurization wastewater in multiple power plants can be processed efficiently without adding separation equipment. The heavy metal ions in desulfurization wastewater can be removed high efficiently. The adsorbent is simple to prepare, the raw materials are cheap and easily available, at the same time, the separation is simple, and heavy metals in wastewater can be easily separated. The technology has the advantages that various heavy metals can be fully separated, at the same time, the separation process becomes easy, and the heavy metal separation efficiency is improved.

The invention discloses a flow control method for a diversion shaft. A predetermined flow value is set, a flow value of a second water outlet pipe is measured as a real-time measured value, and the real-time measured value is compared with the predetermined flow value. When the real-time measured value is greater than the predetermined flow value, a controller issues a control signal to drive a control valve to actuate a pneumatic shut-off device to inflate, the second water outlet pipe tends to be closed until the measured value is equal to the predetermined flow value, and then the pneumaticshut-off device stops inflation. When the real-time measured value is smaller than the predetermined flow value, the controller issues a control signal to drive the control valve to actuate the pneumatic shut-off device to deflate, the second water outlet pipe tends to be opened until the measured value is equal to the predetermined flow value, and then the pneumatic shut-off device stops deflation.

The invention discloses a road rainwater pneumatic diversion treatment system. The system comprises a compressed air source, a gas delivery pipe, a diversion well arranged on a municipal rainwater pipe and a control valve; the diversion well comprises a well body structure, an inlet, a first water outlet pipe, a second water outlet pipe and a pneumatic cut-off device arranged on the second water outlet pipe, the well body structure is provided with the inlet, the first water outlet pipe and the second water outlet pipe, the pneumatic cut-off device is the second pneumatic cut-off device, the inlet is communicated with the municipal rainwater pipe on the upper stream of the diversion well, the first water outlet pipe is communicated with the municipal rainwater pipe on the lower stream of the diversion well or a natural water body, the second water outlet pipe is communicated with a municipal sewage pipe or sewage treatment facilities, and a third outlet is communicated with a first rain pipe or initial rainwater treatment facilities; the control valve comprises the second control valve which is arranged on the gas delivery pipe, and the second control valve controls charging and discharging of the second pneumatic cut-off device separately, and is used for controlling cut off and conducting of the corresponding second water outlet pipe.

The invention belongs to the field of sewage treatment, in particular relates to a method for removing trace polycyclic aromatic hydrocarbon from water by utilizing the quick adsorption of a polylactic acid-caprolactone (P(LA / CL),7 / 3) electrospinning nanofiber membrane, which comprises the two steps of preparing the electrospinning nanofiber membrane and removing the trace polycyclic aromatic hydrocarbon from the water by utilizing the adsorption of the electrospinning nanofiber membrane, namely preparing the electrospinning nanofiber membrane with excellent adsorption performance from biodegradable polylactic acid-caprolactone (P(LA / CL),7 / 3) serving as a raw material by electrospinning technology, wherein the ratio of polylactic acid to the polycaprolactone during synthesis is 7:3; and reacting the electrospinning nanofiber membrane with mixed solution of polycyclic aromatic hydrocarbon at different concentrations to remove the polycyclic aromatic hydrocarbon from the water through adsorption. Through the method for removing the trace polycyclic aromatic hydrocarbon from the water through quick and efficient adsorption provided by the invention, over 80 percent of polycyclic aromatic hydrocarbon (the concentration range is between 1 and 10 micrograms / liter) can be removed from the water within 20 minutes through adsorption, an adsorbent has the advantages of simple preparation process and easy recycling; and the method has the advantages of easy operation, low cost, high efficiency and time conservation.

The invention relates to a cerium-based ozone catalyst containing double active sites as well as a preparation method and application thereof, and belongs to the technical field of advanced wastewatertreatment and environmental catalysis. The preparation method of the cerium-based ozone catalyst comprises the following steps: 1) preparing a melamine solution; 2) adding cerium salt into the melamine solution in the step 1), then adding a polyhydroxyl carboxylic acid auxiliary agent and hydrochloric acid, and stirring to obtain a mixture; and 3) drying the mixture, and calcining to obtain a Ce-g-C3N4 catalyst, which is used for degrading organic pollutants in wastewater. Compared with the prior art, the Ce-g-C3N4 catalyst has the advantages that the preparation process is simple, the raw materials are cheap and easy to obtain, and the Ce-g-C3N4 catalyst is insoluble in acid, alkali and an organic solvent, has high catalytic activity and stability, low dosage, a wide pH application rangeand good reusability, has a good mineralization promotion effect on various refractory organic pollutants, and has a wide prospect in advanced treatment of industrial wastewater.

The invention discloses a plant enzyme odor-removing composite bio-enzyme formaldehyde-removing preparation and a preparation method thereof. The plant enzyme odor-removing composite bio-enzyme formaldehyde-removing preparation is prepared from plant enzyme fermentation liquor, a pure plant extracting solution, bio-protease, a fogging agent, a stabilizer, a humectant and deionized water. The preparation can be directly sprayed on base materials such as furniture, walls, wallpaper, curtains, carpets, floors and the like, volatilization, chelation, capture and catalytic decomposition of pollution sources in the base materials are accelerated, free formaldehyde, TVOC and other pollution gases in air can be decomposed, and particularly, peculiar smells in vehicles can be removed. The preparation disclosed by the invention is a pure plant component extract, is non-toxic and harmless to a human body, does not introduce secondary pollution, and is really environmentally friendly by an environmental protection method; and the storage amount of air pollution such as formaldehyde, benzene series and TVOC is greatly reduced, the effect is obvious, rebound is not likely to happen after treatment reaches the standard, and even rebound can be within the standard.

The invention discloses an anti-backward-flow method applied to a drainage port. The method comprises the steps that an in-well liquid meter and an out-wall liquid meter are used for transmitting collected in-well liquid level information H1 and out-well liquid meter liquid level information H2 to a controller, and the controller is used for controlling action of a control valve according to the relation between the in-well liquid level information H1 and the out-well liquid meter liquid level information H2; when the out-well liquid meter liquid level information H2 is larger than or equal tothe in-well liquid level information H1, an anti-backward-flow program is executed; the control valve operates, a first pneumatic cut-off device is subjected to air inflation, a first water outlet pipe is closed, and natural water connected with the first water outlet pipe or a fluid in a rainwater pipe is prevented from flowing backward into a drainage port well through the first water outlet pipe; when the out-well liquid meter liquid level information H2 is smaller than the in-well liquid level information H1, the anti-backward-flow program exits.

The invention provides a cut-off device. The device comprises a capsule and an outer cover, wherein the capsule forms a flow channel through which fluid is allowed to pass, a containing air cavity orwater cavity is formed inside the flow channel, and the capsule is provided with an inlet to be communicated with the air cavity or water cavity; the outer cover covers the capsule, the inner side ofthe outer cover is matched with the outer surface of the outer wall of the capsule, when pressure gas or pressure water is introduced into the air cavity or water cavity, the outer wall of the capsuleand the inner wall of the outer cover are attached so that the inner wall of the capsule deforms inwards and expands, and therefore the sectional area of the flow channel becomes smaller. Due to thefact that the capsule of dual layers is internally provided with the containing air cavity or water cavity, the capsule is provided with the inlet to be communicated with the air cavity or water cavity, in other words, the whole device can only adopt two components, no other fastener is adopted, replacement can be performed just by pulling out the capsule from the outer cover, and operation is convenient and rapid.

The invention provides a shunting system with pneumatic shunting well, which is used for shunting the fluid in a drainage pipe and comprises a compressed gas source, a gas conveying pipe and the pneumatic shunting well. The pneumatic shunting well comprises a well structure, at least an inlet, a first water outlet pipe and a second water outlet pipe arranged on this well structure, and a pneumaticcut-off device arranged on the second water outlet pipe as the second pneumatic cut-off device, wherein the inlet is communicated with a drain pipe at the upstream of the pneumatic shunting well, thefirst water outlet pipe is communicated with a rainwater pipe or a natural water body at the downstream of the pneumatic shunting well, and the second water outlet pipe is communicated with a sewagepipe or a sewage treatment facility or a detention tank or an initial rainwater pipe or a detention tank or an initial rainwater treatment facility. A control valve comprises a second control valve arranged on the gas conveying pipe, wherein the second control valve controls the charging and the discharging of the second pneumatic cut-off device and is used for controlling the turn-on and turn-offof the corresponding second water outlet pipe. The drain pipes are those in the areas of confluence, diversion or mixed flow or the pipelines in front of the outlet close to the natural water body.

The invention discloses a composite coating agent for aloe gel carried deep submicron Ag and a method of using the composite coating agent for keeping aloe fresh and belongs to the field of fresh-keeping of fruits and vegetables. A synthetic method of the composite coating agent comprises the steps of selecting sodium dodecyl sulfonate and the like as a modifier of Ag, assisting by hydrochloric acid to regulate a pH value, carrying out reaction under the condition of heating and mixing to obtain modified deep submicron Ag, putting the deep submicron Ag, the aloe gel, glycerel monostearte and acetic acid in a magnetic heating mixer, and carrying out mixing and ultrasonic degassing to obtain the aloe gel / deep submicron Ag composite coating agent. With the adoption of the composite coating agent, a composite film can be prepared; after fresh aloe stems and leaves are treated by methods of selection by classifying, impurity removal by cleaning, finishing, slitting, rapid sterilization, coating, packaging and warehousing, the initial colors, the surface elasticity, the moisture and the nutritional ingredients of the fresh aloe stems and leaves can be effectively kept. The composite coating agent, the composite film and the method of using the composite coating agent for keeping the aloe fresh are easy to operate, are high in high performance cost ratio and have a wide prospect.

The invention discloses an effective drainage method for a flow division well. The method comprises the steps that a first alarm liquid level H0 in the flow division well is set, the liquid level H inthe flow division well is continuously collected, and on sunny days, a first pneumatic flow cutting device conducts air inflation, and a first water outlet pipe is closed; after rainy days, when dirty rainwater is divided, H is smaller than H0, the first water outlet pipe keeps closed, when H is larger than or equal to H0, the first pneumatic flow cutting device is controlled to start air discharging, and as time lapses, the aperture of the first water outlet pipe is gradually increased; before the first water outlet pipe is completely opened, if the liquid level in the flow division well descends until H is smaller than H0, the first pneumatic flow cutting device is controlled to stop air discharging, the first water outlet pipe keeps the current aperture, when the clean rainwater afterflow division enters natural water or a rainwater pipe, the first pneumatic flow cutting device conducts air discharging, and the first water outlet pipe is completely opened.

The invention relates to a diversion well with a cut-off device installed on the inner side, which comprises a diversion well body, wherein the diversion well body is provided with a water inlet and two water outlets, the water inlet is used for communicating an upstream drainage pipeline, the first water outlet is used for communicating a downstream drainage pipeline or a natural water body, thesecond water outlet is used for communicating a sewage pipe or a primary rain pipe or a sewage treatment facility or a primary rainwater treatment facility or a regulating storage tank; a shut-off device is provided with a connecting seat assembly, an elastic sleeve and a sealing shell which forms a seal around the elastic sleeve, an air cavity or a water cavity is formed between the sealing shelland the outer wall of the elastic sleeve, the air cavity or the water cavity is provided with an inlet, the elastic sleeve is provided with a flow passage, one end of the sealing shell is provided with a connecting seat component; a second cut-off device is arranged at the second outlet, the second cut-off device is positioned in the diversion well, the connecting seat component of the second cut-off device is connected with the inner wall of the diversion well body, and the flow passage is docked with the second outlet.