79results about How to "Protection from pollution" patented technology

The invention discloses an intelligent monitoring and early-warning system for settlement in subway operation on the basis of a PSD (Position Sensitive Detector) sensor. The intelligent monitoring and early-warning system comprises an industrial control machine, a process control interface card PCI, a PLC (Programmable Logic Controller), a PSD photoelectric position sensor, an automatic shrinkage and protection device, a high-quality laser transmitter, data acquisition hardware, a signal conditioner, wireless transmission equipment and a comprehensive evaluation and early-warning device. The method comprises the following steps that (1) a computer-control main platform in the industrial control machine sends the instructions to the PLC to control the working of the laser transmitter, the PSD sensor and the data acquisition hardware; (2) the data acquisition hardware transmits acquired data to the computer-control main platform by the wireless transmission equipment; (3) the industrial control machine analyzes data results by a real-time data analysis module; and (4) the data analysis results are transmitted to the comprehensive evaluation and early-warning device and early warning is sent out by comparison and analysis of actual measurement values and normative standard values. The intelligent monitoring and early-warning system disclosed by the invention can consider the actual condition of the operating subway, is high in measurement accuracy and less in disturbance of the environment, and has the advantages of being dynamic, real-time, scientific and convenient.

The invention discloses a laser cleaning mechanism used for the pipeline inner wall. The mechanism comprises a base, a focusing device, a rotating device and a reflection lens set; an inner cavity ofthe base is coupled with an optical fiber isolation device connected with a laser source, the focusing device is arranged at the front end of the base, the rotating device is arranged on the front endof the focusing device through a motor base, and the reflection lens set is fixedly connected with the rotating device. The focusing device comprises a focusing lens, the rotating device comprises adrive device and a rotating base, and the reflection lens set is arranged on the rotating base. According to the laser cleaning mechanism, a high-power pulse laser device transmits laser to the optical fiber isolation head through the transmission optical fibers, the pulse laser path passes through a hollow shaft of a stepping motor, the laser path is directly transmitted to the reflection lens placed at an angle of 55 degrees, the pulse laser path is changed, the high-power pulse laser is reflected and is incident to the pipeline inner wall required to be cleaned through a protection lens, amotor rotates to drive the laser path to rotate to finish the cleaning of the pipeline inner wall, and the mechanism is simple in structure, flexible and convenient to operate, and capable of effectively achieving the laser cleaning work of the pipeline inner wall.

The invention discloses a composition containing inonotus obliquus extract and application of composition, and aims to provide a composition which can form a layer of air breathable film on the surface of skin, effectively reducing the pollutant adhering, enhancing the natural barrier function of skin, effectively resisting irritation, allergy and other problems of outside pollutants to skin; the composition is mainly prepared from, by weight, 10-25 parts of inonotus obliquus extract, 8-20 parts of moringa pterygosperma seed extract, 5-15 parts of Bordeaux leaf extract, 3-10 parts of undaria pinnatifida extract. The composition belongs to the field of cosmetics.

The invention relates to a natural gas recycling method for compressed natural gas stations, and mainly solves the problems that in the prior art, natural gas is wasted and environmental pollution is caused. The natural gas recycling method well solves the problems by adopting the technical scheme that natural gas from a recycling pipeline is divided into at least two paths after passing through a gas collecting main pipe, one path is emptied through an emptying pipeline, the other path enters a buffer tank, the natural gas from the buffer tank is fed into a compressor, and when the pressure of the recycling pipeline is reduced to be consistent with that of a gas pipeline in front of the compressor, a control valve of the emptying pipeline is opened to empty the natural gas. The method can be applied to compressed natural gas stations.

The invention discloses an anti-bacteria mite-repelling clothes washing slice which comprises a clothes washing slice body; a cavity which is of a hollow structure is formed in the center position of the clothes washing slice body; the cavity is divided into a first cavity and a second cavity; a transverse partition is arranged between the first cavity and the second cavity; perforated holes for increasing a dissolution contact area are formed in the clothes washing slice body; the perforated holes are regularly and uniformly distributed; a plurality of invaginated round slots are formed in the inner walls of the perforated holes. A preparation method of the anti-bacteria mite-repelling clothes washing slice comprises: (1) weighing; (2) batching and mixing; (3) baking; (4) forming. The anti-bacteria mite-repelling clothes washing slice disclosed by the invention is a clothes washing slice which is super-concentrated, has a small volume, is easy to store and convenient to carry, has a high dissolving speed and has anti-bacteria and mite-repelling functions.

The invention discloses a fireproof and waterproof composite floor and a fireproof and waterproof composite decoration board. Both the fireproof and waterproof composite floor and the fireproof and waterproof composite decoration board are made of a composite board, and the composite board comprises a fireproof and waterproof core material and a decoration surface layer pressed on or bonded on thefireproof and waterproof core material, wherein the fireproof and waterproof core material is selected from a core material synthesized from powder and plastic through an internal mixer or an extruder, a core material synthesized from the powder and an adhesive by a hot press, and a core material synthesized from the powder and magnesium oxysulfate by a pressing machine; the powder is one of or amixture of recycled PCB powder and bakelite powder. The composite floor and the composite decoration board are made of the recycled PCB powder, the plastic, the magnesium oxysulfate, the adhesive andthe like, have fireproof, waterproof and heat-conducting properties, and are low in price and attractive in appearance. Recycling of plastic and main industrial waste of the electronic industry is realized, the enterprise cost is more effectively saved, and remarkable social benefits and economic benefits are realized.

The invention discloses an environment-friendly waste water purification palm waste thermal power generation boiler. A palm feeding opening is formed in the side surface of the bottom of the boiler body, a palm smashing device is arranged on the surface of the outer side of the boiler body, a heat transferring barrel is sleeved with the boiler body, and a waste gas recovering and purifying mechanism is connected to the waste gas outlet end; a waste water tiny metal sorting and collecting mechanism is arranged at a port of a liquid outlet, a steam water pipe is coiled between the heat transferring barrel and the boiler body, and a variable speed turbo charger air outlet mechanism is arranged at the air outlet end of the steam water pipe; and a controller is arranged outside the boiler body and is electrically connected with an air blower, the variable speed turbo charger air outlet mechanism and the waste gas recovering and purifying mechanism. The environment-friendly waste water purification palm waste thermal power generation boiler has the beneficial effects of being simple in structure and high in practicability.

The invention discloses precision filtering device and method for finely processing condensation water from a nuclear power station, relating to the field of nuclear power stations, wherein the precision filtering device is arranged between a condensation water pump and a condensation water booster pump; the precision filtering device comprises a precision filter and a valve; when the nuclear power station runs, water from the condensation water pump passes through a condensation water fine processing system and the precision filter in sequence and finally goes to the condensation water booster pump; and when the nuclear power station is started, water from the condensation water pump passes through the precision filter and the condensation water fine processing system in sequence and finally goes to the condensation water booster pump. A rear precision filter and a front precision filter in the embodiment are the same equipment and are switched by the valve to achieve use in front during starting or use at rear during the normal running, the steam-water quality of the secondary circuit of the nuclear power station is not only improved, the safe and high-level running of the nuclear power station is effectively ensured, but also the start time of the unit is greatly shortened, and the washing water amount at the starting of the unit is reduced.

The invention discloses a curtain wall with a solar air and hot water heat collector. The curtain wall comprises a solar heat collector and a curtain wall plate which are in sequential arrangement in a direction leaving far away from the outer surface of a wall body of a building, wherein the curtain wall plate is made of light transmission materials; the solar heat collector comprises a heat absorption film and a heat absorption structure; the heat absorption film and the outer surface of the wall body of the building are defined into a sealed air circulation passage; the top of the heat absorption film is provided with a first ventilation device; a ventilation opening is formed in the upper part of the wall body of the building; an air circulation device is arranged at the ventilation opening formed in the upper part of the wall body of the building; the bottom of the wall body of the building is provided with a ventilation opening; and a second ventilation device is arranged at the ventilation opening formed in the bottom of the wall body of the building. The curtain wall has the beneficial effects that the solar air and hot water collector function is integrated in the curtain wall; the problem that the solar heat collector needs to be processed in a factory is solved; the effect of beatifying the building is achieved; the air and hot water function of a conventional solar heat collector is achieved; and the curtain wall can achieve a temperature reduction effect on the building in summer and can provide heating and fresh air preheating for the building in winter.

The invention discloses a packaging structure and packaging method of a module comprising bare chips of a thin-film bulk acoustic wave device. The packaging structure of the multi-chip module comprises a substrate and bare chips, wherein the bare chips include the bare chips of the thin-film bulk acoustic wave device and other functional bare chips; electrodes of all bare chips are correspondingly connected with electrodes of the substrate through golden balls in a flip-chip manner; a film is bonded and fixed on the surface of the substrate; the film is clung to the surface of the substrate and coats all bare chips; and vacuum chambers are formed between all bare chips and the substrate. The electrodes of the bare chips on the to-be-packaged multi-chip module are welded on the corresponding electrodes in corresponding packaging areas on the substrate through a flip-chip technology during packaging; the protective film is laminated on the substrate through a vacuum laminating technology and coats all chips; and heating and solidifying are carried out and the substrate is finally cut according to the packaging areas. According to the packaging structure and the packaging method, the bare chips are directly adopted for packaging, so that the volume is greatly reduced in comparison with that of original secondary packaging, and meanwhile, the packaging efficiency is improved.

The invention provides a saliva preservation solution, and a preparation method and application thereof. The saliva preservation solution comprises a DNA stabilizer including disodium edentate, tartaric acid and at least one selected from a group consisting of nitrilotriacetic acid and dihydroxyethylglycine; a microbial inhibitor including penicillin, streptomycin, geneticin and at least one selected from a group consisting of potassium sorbate, sodium benzoate, ethylparaben sodium, ketoconazole and puromycin; and a buffer solution including a TE buffer solution and at least one selected from a group consisting of a PBS buffer solution and a sodium chloride glucose buffer solution. According to the invention, through preparation of the saliva preservation solution, the morphology of cells in a saliva swab is maintained and prevented from disruption, and the growth of microorganisms in the saliva swab and the saliva preservation solution is inhibited.

The invention discloses a packaging structure for a film volume acoustic wave filter and a packaging method. The packaging structure comprises a substrate and a chip, wherein a chip electrode is correspondingly connected with a substrate electrode through flip chip; a film layer is fixedly spliced on the surface of the substrate; the film layer is clung to the surface of the substrate and is wrapped on the chip. The packaging method comprises the following steps: 1) dividing a chip packaging area on the substrate; 2) respectively welding the electrode on the to-be-packaged substrate with the corresponding electrode in the corresponding area through a flip-chip bonding technique; 3) pasting a protecting film on the substrate and wrapping all the chips; 4) raising temperature, splicing and curing the protecting film; 5) cutting the substrate, thereby acquiring the film volume acoustic wave filter. According to the invention, the chips are prevented from being polluted, the microminiaturization is realized and the processing efficiency is increased.

The invention provides an outdoor lighting device. The outdoor lighting device includes: a light source driving circuit board, on which a light source driving circuit is arranged; a light source board, on which a light emitting diode light source electrically connected to the light source driving circuit is installed, and the light emitting diode light source A plurality of light-emitting diodes are included, and the plurality of light-emitting diodes include small light-incidence-angle light-emitting diodes. The outdoor lighting device has the advantages of simple structure, low micro-current power consumption, no heat generation, strong anti-interference ability to power supply, explosion-proof function, long life without maintenance, good versatility, low cost, long-term lighting does not affect eye health, etc., mainly The performance parameters meet the requirements of relevant national standards, and the produced light-emitting diodes with small beam angles can be used in the lighting system, which greatly reduces the production cost and does not need to discard the light-emitting diodes with small beam angles.

A pattern electroplating production method for a printed circuit board needed to be nickel-gold plated on the whole board comprises the following steps of (1) providing an electrolytic gold plate, wherein the electrolytic gold plate is a printed circuit board needed to be nickel-gold plated on the whole board; (2) forming an outer-layer dry film; (3) electroplating a pattern, in the pattern electroplating process, the electrolytic gold plate is sequentially subjected to the following steps of plate loading, oil removal, washing with three-level water, slight etching, washing with second-level water, plated copper pre-impregnation, copper plating, washing with second-level water, anti-oxidant processing, washing with one-level water and plate discharging, and in the anti-oxidant processing, the electrolytic gold plate is placed in an anti-oxidant pot loaded with an anti-oxidant agent and is immersed in a watermill loaded with a micro acid solution after discharging; (4) carrying out horizontal anti-oxidant processing; (5) plating nickel and gold; (6) etching an outer layer; and (7) carrying out outer-layer AOI. By the method, a copper surface is protected to be clean and is prevented from oxidized and polluted by watermark, and scrap caused by unfavorable gold after nickel-gold plated on the whole board is further prevented.

The invention discloses a jeans multi-pattern hole breaking device for garment processing, and relates to the technical field of jeans multi-pattern hole breaking. The jeans multi-pattern hole breaking device for garment processing comprises a supporting platform, wherein a hole breaking box is arranged on the outer surface of the top of the supporting platform; a partition plate is mounted on theinner wall of the hole breaking box in a welding mode; a hole breaking mechanism is arranged on the outer surface of the top of the partition plate; two sets of second connecting blocks which are symmetrically designed are mounted on the outer surface of the bottom of the partition plate in the welding mode; a dust collection mechanism is arranged on the outer surface of the bottom of the partition plate; and a mounting plate is mounted on the outer surface of the top of the supporting platform in the welding mode. According to the jeans multi-pattern hole breaking device for garment processing, hole breaking treatment can be carried out on jeans more effectively, hole breaking grinding wheels can be replaced more effectively, multi-pattern hole breaking treatment can be carried out on the jeans, the working efficiency is improved, the environment is further protected against dust pollution, and the cleanness of air in an operation space is protected.

The invention discloses an easily-dispersible aluminum pigment used for ink. The pigment comprises the following raw materials by weight: 80 to 90% of modified aluminum powder, 8 to 18% of aldehyde ketone resin, 1 to 2% of a wetting dispersant and 1 to 2% of an antioxidant. The invention also discloses a preparation method for the easily-dispersible aluminum pigment used for the ink. The easily-dispersible aluminum pigment used for the ink and the preparation method thereof provided by the invention have the following advantages: the preparation method is simple; the raw materials are easily available; and the obtained easily-dispersible aluminum pigment used for the ink has good dispersing property, is free of influence on adhesive force of the ink and is pollution-free, non-toxic and environment-friendly.

The invention relates to a medical treatment instrument and discloses a colonic lumen series isolating membrane. The isolating membrane is tubular; a first annular airbag integrally connected with the isolatingmembrane is arranged at the lower end of the isolating membrane; a second annular airbag and a longitudinal airbag are arranged on the isolating membrane; the longitudinal airbag is communicated with the first annular airbag and the second annular airbag; a connecting part is arranged at the upper end of the isolating membrane. The tubular isolating membrane has isolation and protection effects on colonic anastomotic stoma in the colonic lumen; the contents (excrements) of the colonic lumen after operation move through an isolating membrane cavity, so that the excrements are prevented from being in contact with anastomotic stoma tissues, the anastomotic stoma is effectively protected from being polluted, the tension of the excrements in the colonic lumen on the anastomotic stoma is reduced, the healing of the anastomotic stoma is facilitated, and the occurrence of anastomotic fistula is reduced; the purpose of carrying out focal excision and anastomosisin the stage I under the circumstance that the bowel preparationis in no condition to be effectively performed for complete intestinal obstruction and the like caused by emergency treatment of left colon rupture or colon tumor due to war injury is achieved.

The invention relates to a loss-control controlled-release fertilizer which is composed of urea, monoammonium phosphate, ammonium chloride, potassium chloride and ammonium bicarbonate. When the fertilizer is in use, an auxiliary material attapulgite is needed. The ratio of the attapulgite, urea, monoammonium phosphate, ammonium chloride, potassium chloride and ammonium bicarbonate is 6:34.15:31.71:19.51:4.88:9.76. The fertilizer is reasonable in preparation, can supply sufficient nutritive elements to soil in time, enhances the utilization ratio of the fertilizer on crops, reduces the fertilizer loss in the use process, and has higher actions on social permanent and steady development in the aspects of environment protection and energy saving.

The invention discloses novel palm electric spark environment-friendly power generation equipment capable of detecting waste gas concentration in a timing and quantitative manner. The novel palm electric spark environment-friendly power generation equipment comprises a boiler body which is fixedly arranged on the ground, wherein a palm inlet is arranged on the side surface of the bottom of the boiler body; a palm crushing device and a conveying device are arranged on the outer side surface of the boiler body; a heat transmission barrel is arranged in the boiler body in a sleeved manner; a combustion tank corresponding to the palm inlet is arranged at the bottom of the heat transmission barrel; air blowers are uniformly fixedly arranged on the inner side surface of the combustion tank; a waste gas outlet end is arranged on the side surface of the bottom end of the boiler body; the waste gas outlet end is connected with a waste gas recycling and purifying mechanism; a steam water pipe is coiled between the heat transmission barrel and the boiler body; a variable-speed turbocharging gas outlet mechanism is arranged at a gas outlet end of the steam water pipe; and a controller is arranged on the outer part of the boiler body. The novel palm electric spark environment-friendly power generation equipment has the beneficial effects that structure is simple, and practicability is high.

The invention discloses ramsbottom carbon powder molding adhesive. The ramsbottom carbon powder molding adhesive is prepared by mixing 20 to 30 percent of caustic soda sodium hydroxide solution, 20 to 30 percent of urea solution and 40 to 60 percent of corn starch and adding hot water at the temperature of between 60 and 80 DEG C into the mixture with mixing, wherein the concentration of the sodium hydroxide solution is 0.1 to 5 percent and the concentration of the urea solution is 0.1 to 5 percent. The formula is simple and practical; the materials are easy to obtain; and after the adhesive is used, the ramsbottom carbon powder has good molding, low ash content, good adhesive performance and good chemical activity, has consistent using effect of ramsbottom carbon, reduces the energy waste, avoids environment pollution and provides a guarantee for reducing production cost and promoting benefit.

The invention discloses an environment-friendly steam turbine. The environment-friendly steam turbine comprises a boiler body. A palm feeding opening is formed in the surface of the bottom side of the boiler body. A palm crushing device and a transmission device are arranged on the surface of the outer side of the boiler body. A heat transfer barrel body is mounted in the boiler body in a sleeved manner. A combustion groove corresponding to the palm feeding opening is formed in the bottom inside the heat transfer barrel body. Air blowers which are distributed uniformly are fixedly mounted on the surface of the inner side of the combustion groove. An exhaust gas outlet end is arranged on the surface of the bottom end of the boiler body and connected with an exhaust gas recycling and purifying mechanism. A steam water pipe is arranged between the heat transfer barrel body and the boiler body in a coiled manner. A variable speed turbocharging gas outlet mechanism is arranged at the gas outlet end of the steam water pipe. Sampling detection mechanisms different in height are arranged on the outer surface of the boiler body. A controller is arranged outside the boiler body. The environment-friendly steam turbine has the beneficial effects of being simple in structure and great in practicability.

The invention discloses a protective mask for isolating droplet propagation of a patient during oral treatment; the mask comprises a mask body, and the mask body is provided with an eye shielding part, a nose bridge fixing part and an oral cavity shielding part; a transparent film for shielding eyes is arranged in the middle of the eye shielding part, and metal wires are arranged on the two side edges of the eye shielding part; a nose bridge strip is arranged in the nose bridge fixing part; the oral cavity shielding part is provided with dental rubber barrier cloth covering the oral cavity, and a pair of hanging lugs are arranged on the two side edges between the nose bridge fixing part and the oral cavity shielding part. According to the protective mask, water vapor generated in the dental treatment process is prevented from being combined with saliva of a patient from the source, the eyes, the mouth and the nose of the face of the patient are effectively shielded, and the face and the eyes of the patient are protected against chemical injuries caused by splashing of the water vapor and treatment medicines. Therefore, the protective mask can effectively improve the protective effect in dental treatment, protects the body health of doctors and patients, and is suitable for clinical general popularization and application.

The invention discloses permanent magnet rotation type environment-friendly quantitative-detection palm waste combustion turbine electricity generating equipment for a power plant. The permanent magnet rotation type environment-friendly quantitative-detection palm waste combustion turbine electricity generating equipment for the power plant comprises a boiler body. A palm feeding port is formed in the side surface of the bottom of the boiler body. A palm smashing device is arranged on the outer side surface of the boiler body. A heat transfer barrel is arranged inside the boiler body in a sleeved mode. An exhaust gas outlet end is connected with an exhaust gas recycling and purifying mechanism. Sampling and detecting mechanisms at different heights are arranged on the outer surface of the boiler body. A waste water tiny metal sorting and collecting mechanism is arranged at the port of a liquid outlet. A steam water pipe is wound between the heat transfer barrel and the boiler body. The air outlet end of the steam water pipe is provided with a variable-speed turbocharging air outlet mechanism. A controller is arranged outside the boiler body. The controller is electrically connected with air blowers, the variable-speed turbocharging air outlet mechanism, the sampling and detecting mechanisms and the exhaust gas recycling and purifying mechanism. The permanent magnet rotation type environment-friendly quantitative-detection palm waste combustion turbine electricity generating equipment for the power plant has the beneficial effects of simple structure and high practicality.

The invention discloses a pesticide mixing and spraying device for agriculture. The device comprises a spraying device body and shoulder straps, wherein a mixing and stirring tank is arranged inside the spraying device body, a measuring scale is arranged on the sidewall of the mixing and stirring tank, a buoy is arranged on the measuring scale, a stirring rod is arranged on the other sidewall of the mixing and stirring tank, a spraying agent outlet is formed in the bottom of the mixing and stirring tank and is connected with a spraying pipe, a high-pressure hydraulic pump is arranged at the bottom of the spraying pipe, a hand-operated shower head is arranged at the top end of the spraying pipe, a pesticide spraying arm is arranged in the middle of the exterior of the spraying device body, a pesticide sprayer is arranged on the pesticide spraying arm, liquid atomization holes are formed in the pesticide sprayer, and the shoulder straps are arranged on one side face of the spraying device body. According to the pesticide mixing and spraying device for agriculture, the structure is simple, omnidirectional and flexible spraying can be achieved, the working time of manual spraying can be shortened, and the working efficiency is increased.

The invention discloses an anti-dazzle LED directional lamp based on photo-thermal integrated design. The anti-dazzle LED directional lamp comprises a PCB, wherein the PCB is arranged in a shell; a reflection cup is connected with the PCB; an LED base plate is arranged in the reflection cup and is connected with a Fresnel lens; a fly's-eye lens is connected with the top of the reflection cup. The invention further discloses an implementation method of the anti-dazzle LED directional lamp based on photo-thermal integrated design. The anti-dazzle LED directional lamp based on photo-thermal integrated design has the characteristics of simple structure, low cost, excellent uniformity, low energy consumption, less luminous decay, excellent heat dissipation and the like.

This invention has publicized one kind of oil pocket water type diesel oil emulsifier and the preparation method, it by the diesel oil, helps the emulsifier, the water-soluble emulsifier three kind of fabrics to mix the agitation after the mechanical power to become successively, the diesel oil includes: 0#, - 35#, -10#, - 20# and so on; Helps the emulsifier by the tribute phosphate 5-9%, normal butyl alcohol 35-45%, ethyl alcohol 48-55%, two cyclic diolefine bases to gather the iron 2-5%; The water-soluble emulsifier by polyethyleneoxide octyl phenol ether - 10 20-25%, diethanolamine 5-8%, ethylene diamine four ethanoic acid two sodium 0.3-0.7%, sodium hexametaphosphate 7.5-8%, ethyl alcohol 45-50%, water 14-18% is composed; The above three material's proportion is: 68:31.5:0.5; The preparation method is: First and helps the water-soluble emulsifier the emulsifier mix to stir with the mechanization 5-8 minutes, the engine off 5-8 minutes; Joins the water-soluble emulsifier to join the mix again to stir 10-20 minutes, the engine off 5-10 minutes, starting stirs 20-25 minutes again, the engine off latter 30 minutes carries on the quality detection, after qualified is ready to be used, sale.

The invention provides a buried double-layer petroleum product storage tank. The buried double-layer petroleum product storage tank is corrosion-resistant, electrolysis-resistant and leakage-proof and comprises an outer case, an interlayer and an inner case. The upper portion of the storage tank is provided with a tank hole which is communicated with the inner case through the outer case and the interlayer. The buried double-layer petroleum product storage tank further comprises a remote monitoring leakage detecting system, the remote monitoring leakage detecting system is inserted to the bottom of a storage tank leakage detecting pipe from the top of the storage tank leakage detecting pipe and communicated with the interlayer, and the detection sensor of the remote monitoring leakage detecting system is mounted at the bottom of the leakage detecting pipe and communicated with the interlayer. The outer case is made of FRP (fiber reinforced plastics) materials and has a width of 3-4 mm, thereby having high acid and alkali resistance and high electrolysis resistance, further when serving as a buried storage tank, the double-layer petroleum product storage tank can avoid acid and alkali corrosion and electrolytic corrosion of underground water and saline-alkali soil production in coastal areas, improve the usage quality and prolong the service life.

The present invention discloses a feed for eels. The feed for the eels is prepared from the following raw materials in parts by weight: 100-150 parts of tea seed meal, 50-80 parts of sorghum flour, 20-40 parts of fish meal, 22-32 parts of bean curd residues, 3-8 parts of cerealose, 1-2 parts of trace elements, 0.5-1.5 parts of amino acids, 1-3 parts of vitamin C, 1-3 parts of vitamin E, 5-15 parts of a Chinese herbal medicinal extract, 5-10 parts of tea seed oil, 3-8 parts of bran, 4-12 parts of vinegar residues, 10-30 parts of bone meal, 5-15 parts of sodium chloride, 3-10 parts of fish oil, 2-6 parts of dietary fibers, 15-25 parts of pre-gelatinized starch, 0.1-0.5 part of compound micro-organism liquid, 0.1-0.3 part of a compound enzyme preparation, 0.1-0.3 part of probiotics and an appropriate amount of pure water. The feed is scientific and reasonable in formula and rich in nutrition, contains rich proteins, vitamins, amino acids and trace elements, meets requirements of the eels for various nutritional components in different stages, is high in feed conversion rate, can improve food intake amount of the eels, accelerates growth speed of the eels, contains the Chinese herbal medicinal extract, has functions of promoting digestion and reducing food stagnation, preventing micro-organisms and enhancing immunity, and is more easy for digestion, absorption and utilization of the eels.

The invention belongs to the field of synthetic leather, and particularly relates to low-VOC (volatile organic compounds) artificial leather and a preparation method thereof. The low-VOC artificial leather contains a first resin layer, a second resin layer and a base cloth layer from top to bottom sequentially, wherein the resin layer is prepared from the following components in parts by mass: 85-92 parts of polyurethane, 0.2-0.8 parts of a thickener, 0.1-0.6 parts of a defoamer and 3-8 parts of nano-zinc oxide; the first resin layer and the second resin layer are adhered by an adhesive layer,and the second resin layer and the base cloth layer are adhered by an adhesive layer. The low-VOC artificial leather is obtained by steps as follows: preparation of the resin layers from polyurethane, adhering, separating and winding, a product is environmentally friendly, low in energy consumption and excellent in performance and batch production is facilitated.