46results about How to "No secondary hazards" patented technology

The invention discloses an automatic electric switch cabinet fire extinguishing system and a fire recognition method, wherein the automatic electric switch cabinet fire extinguishing system comprises a fire extinguishing agent nozzle which is arranged in an electric switch cabinet; the fire extinguishing agent nozzle is connected with a storage device in which a non-conducting fire extinguishing agent is stored through a pipeline; an electromagnetic valve which is controlled by a central controller is arranged on a pipeline; a photoelectric sensor is also arranged in the electric switch cabinet; and the photoelectric sensor outputs a detection signal to the central controller and then the central controller judges whether to open the electromagnetic valve. The automatic electric switch cabinet fire extinguishing system is capable of responding sudden electric fire and reducing the loss caused thereby. Fire extinguishing agents such as heptafluoropropane and superfine dry powder are used and non-conducting, so that secondary danger caused by conduction of fire extinguishing agents does not occur; and the fire extinguishing agents are environmental-friendly, so that the damage to the environment caused by conduction of fire extinguishing agents also does not occur. The photoelectric sensor is used, so that the fire such as electric arc and the like in the switch cabinet can be rapidly and correctly detected.

The invention discloses a preparation method of super-hydrophobic self-cleaning glass based on a ZnO nano array coating. The preparation method comprises the following steps: preparing ZnO seed layer sol by a sol-gel method; plating ITO glass with a ZnO seed layer by a dipping-pulling method; performing heat treatment and paving a layer of polystyrene spheres; performing hydrothermal treatment on the prepared ZnO seed layer/PS material in a ZnO growth solution to obtain a ZnO/PS nano rod array; and treating the ZnO/PS nano rod array with toluene for a period of time to obtain the super-hydrophobic self-cleaning glass. According to the super-hydrophobic self-cleaning glass based on a ZnO nano array coating prepared by the method disclosed by the invention, the transmittance of visible light can reach 96.3%, and both of the ultraviolet absorption efficiency and shielding efficiency can reach 90%; and according to the test by a contact angle meter (DSA series), the contact angle to water exceeds 152 degrees. The preparation method disclosed by the invention has the advantages of no secondary harm, low cost, easiness in implementation and convenience in control.

The invention discloses a novel horizontal screw-extrusion solid-liquid separation machine. The novel horizontal screw-extrusion solid-liquid separation machine comprises a housing, a spoke support, a feeding dehydration mechanism and a pressure adjustment mechanism, wherein the housing comprises a main shell body and a conical shell body; the main shell body and the conical shell body are arranged at a front side and a rear side of the spoke support separately; a circular-barrel screen group is arranged in the main shell body; and a conical-barrel screen group matched with the conical shell body is arranged in the conical shell body. The feeding dehydration mechanism is arranged in the circular-barrel screen group, and comprises a hollow shaft and a front screw sheet; and the front screw sheet is arranged at an outer side of the hollow shaft. A conical press head is arranged at a rear end of the hollow shaft; and a rear screw sheet is arranged at an outer side of the conical press head. The pressure adjustment mechanism is arranged at a discharge port, and comprises a slide sleeve, a nut seat and a pressure adjustment cylinder group. According to the novel horizontal screw-extrusion solid-liquid separation machine disclosed by the invention, many dehydration structures are designed, classified dehydration is carried out on materials through the two screw sheets, and high dehydration capacity is achieved; a pressure on the materials can be adjusted in real time; and the novel horizontal screw-extrusion solid-liquid separation machine is small in size, high in efficiency, capable of avoiding material blockage, and high in automation degree.

The invention provides a high-efficiency sulfur-doped zinc oxide nano material preparation method, which comprises the following steps: S1, utilizing a precipitation method to prepare a nano zinc oxide precursor solution; S2, sequentially adding thioacetamide and ethylene diamine tetraacetic acid into the nano zinc oxide precursor solution to react; S3, separating precipitate out after reaction is finished and cleaning and drying to obtain white solid particles; S4, thermally treating the white solid particles. According to the preparation method disclosed by the invention, the ethylene diamine tetraacetic acid is utilized to enable the thioacetamide to be a lot doped into the nano zinc oxide precursor solution; thus, high-concentrate sulfur doping in ZnO is achieved, and a defect structure and surface free energy of a ZnO nano material are changed; furthermore, fluorescent performance of the zinc oxide nano material is greatly enhanced.

The invention relates to microbial fermentation, in particular to a preparation method of pleurotus ostreatus fermentation broth and application of the fermentation broth in degradation of aflatoxin B1. Pleurotus ostreatus CICC14012 is inoculated in an axenic culture medium containing carbon sources, nitrogen sources, inorganic salt and trace elements to conduct aerated fermentation cultivation to prepare the fermentation broth, and the fermentation broth can be used for degrading the virulence of the aflatoxin B1. By means of the method, the technical problems that an existing aflatoxin B1 removal method needs special conditions and special materials, is high in labor intensity and not complete in detoxification, has an effect on breaking nutritious components in processed fodder, and is severe in required condition, prone to producing chemical residuals and causing secondary pollution and the like are solved. The pleurotus ostreatus fermentation broth prepared through the method has the advantages of being easy and convenient in process, free of environment pollution and high in product safety, and has the advantages of being high in degradation speed, high in degradation rate, small in addition amount and the like when used for degrading the aflatoxin B1.

The invention relates to denitrifying low-NOx emission control process for a circulating fluidized bed boiler. The denitrifying low-NOx emission control process comprises the following steps that thearea of the evaporating heating surface in the boiler is increased, and the heat absorption capacity of the evaporating heating surface of a boiler furnace is changed; the size of hood small holes ofa wind-distribution plate is adjusted, and the size of slag discharging holes of the wind-distribution plate and the size of hood openings in the surrounding wall surfaces are increased; the inlet velocity and incident angle of an inlet flue of a cyclone separator are adjusted, the circulation area of a riser is adjusted according to the amount of fired coal of the boiler and the efficiency of thecyclone separator, the circulation area and the air volume of material-returning air of a material returning valve are adjusted, the flow rate of materials on the interface of a material returning system is controlled at 90-150kg/s through adjustment, the material circulation of the boiler is increased, and the burning temperature is reduced; and an appropriate amount of low-oxygen flue gas is extracted between a dust remover of the boiler and a draft fan and sent to a primary air inlet or a hot primary air outlet of an air pre-heater, the initial oxygen content of coal combustion is reduced,then the low-oxygen flue gas is fed into a primary air chamber at the bottom of the boiler, and the excess air coefficient of the primary air chamber at the bottom of the boiler is adjusted to be 0.4-0.8.

The invention discloses an aluminum ash-based porous ceramic material and a preparation method thereof, raw materials including secondary aluminum ash, incineration treatment fly ash, incineration treatment slag, electroplating sludge and silicon-containing solid waste are sequentially subjected to mixing ball milling, high-pressure dry forming and firing, and the aluminum ash-based porous ceramic material is obtained. The method is simple to operate, no water participates in the preparation process, harmful gas released by reaction of aluminum ash with water is avoided, all the raw materials adopt solid waste, no additional commercial chemical reagent is needed, the cost is low, and the prepared porous ceramic material is small in volume weight, high in strength, good in heavy metal curing effect and free of secondary pollution.

The invention relates to an environment-friendly recovery method for an ethyl chloride production by-product sulfur, comprising the following steps: step 1), placing small-particle sulfur of a by-product of ethyl chloride production in a high-shearing kettle, adding water, and conducting pulverizing to form a powder of 120 mesh or more; step 2), placing a pulverized sulfur suspension in a treatment kettle for water steam distillation; step 3), introducing a primary oxidant for primary oxidation reaction, wherein the primary oxidant is chlorine; step 4) after the primary oxidation reaction, introducing a secondary oxidant for a secondary oxidation reaction, and at the same time, adjusting the temperature in the treatment kettle to carry out a hydrolysis reaction, wherein the secondary oxidant is ozone; and step 5), after the secondary oxidation reaction and the hydrolysis reaction, cooling the temperature of the suspension, and conducting suction filtration, washing the obtained filtercake by clear water, conducting drying through baking or melting, and conducting slicing, so as to obtain a finished product sulfur. According to the present invention, the recovery method for the ethyl chloride production by-product sulfur is extremely friendly to environment.

The invention relates to a coupling agent, a porous carburizing coating fiber and a preparation method thereof, and belongs to the technical field of carbon fiber material preparation. The inherent low-strength problem of an existing activated carbon fiber is solved. The preparation method of the porous carburizing coating fiber comprises the following steps that 1, a basalt fiber is subjected tosurface acid and alkali etching treatment; 2, the surface modified basalt fiber is coated with a tetrahydrofuran solution of bis(2-furylmethoxy)dimethylsilane and a tetrahydrofuran solution of furaldehyde and furan methanol condensation resin, and the coating layer is further polymerized and solidified; and 3, the basalt fiber after coating is carbonized and activated to obtain the basalt fiber with a porous carburizing coating. According to the preparation method, the basalt fiber is adopted as a matrix fiber, a porous carbon layer is formed by surface carburizing treatment, thus the porous carburizing coating fiber has the pore characteristics of the activated carbon fiber, and meanwhile has good mechanical strength of the basalt fiber.

The invention provides a halogen-free flame-retardant glass fiber-reinforced polycarbonate alloy material, which belongs to the technical field of high polymer materials. The polycarbonate alloy material comprises the following raw materials by weight: 70 to 85 parts of a polycarbonate resin, 14 to 19 parts of a toughening agent, 7.5 to 10 parts of polyethylene terephthalate, 0.3 to 0.7 part of an antioxidant, 3 to 8 parts of light calcium carbonate, 27 to 36 parts of metal phosphate, 8 to 14 parts of glass fibers and 0.6 to 0.9 part of a lubricant. The provided halogen-free flame-retardant glass fiber-reinforced polycarbonate alloy material has high-modulus resistance and high rigidity, is applicable to production of automobile parts with high requirements on precision and has bending strength of 105 to 130 MPa, flexural modulus of 3400 to 4100 MPa, elongation at break of 15 to 20%, notched impact strength of 10 to 15 KJ/m2 (under the condition of -40 DEG C), heat distortion temperature of 110 to 130 DEG C and flame resistance of V-0 (UL-94-1.6 mm). Poisonous and harmful halogen is not released during combustion of the alloy material, thereby causing no secondary harm.

The invention discloses an odor monitoring and deodorization treatment system for garbage cans, which comprises a monitoring module, a deodorization module and a remote control module, the monitoring module is used for generating temperature and humidity information and odor information of garbage, the deodorization module is used for completing deodorization operation according to the monitoring information, and the remote control module is used for realizing automatic garbage classification. By the adoption of the odor monitoring and deodorization treatment system, deodorization operation and classification operation of garbage can be automatically achieved, and the garbage treatment effect is better.

The invention relates to a metal sheet electrochemical inner spray cutting forcible entry device and method. The device comprises an electrolysis device and an electrolyte supplying device, wherein the electrolysis device comprises an output power source and an electrode tube; two electrodes of the output power source are electrically connected with a metal sheet and the electrode tube correspondingly; the electrode tube is of a hollow structure; at least one spray hole is formed in the side portion of the electrode tube; and the electrolyte supplying device communicates with the electrode tube. The metal sheet electrochemical inner spray cutting forcible entry device and method are safe in use and do not bring secondary hazards.

The invention relates to the technical field of cables, in particular to a fireproof railway digital signal cable and a manufacturing method thereof. The fireproof railway digital signal cable comprises a twisted body and a pair of signal lines, wherein the twisted body comprises an insulation line core and a diversion line, the diversion line is twisted on the insulation line core, the insulationline core comprises an inner conductor and an inner insulation layer, the inner insulation layer wraps an outer side of the inner conductor, a shielding layer wraps a surface of the twisted body, anouter insulation layer wraps an outer side of the shielding layer, the pair of signal lines are two outer insulation layers pasted together, a tensile layer is inserted between the pair of signal lines in a penetrating way, an internal fireproof layer wraps outer sides of the pair of signal lines, an oxygen isolation layer is pressed at an outer side of the internal fireproof layer, and an external fireproof layer is pressed on a surface of the oxygen isolation layer. The fireproof railway digital signal cable has the characteristics of small transmission attenuation value in a high- and low-temperature environment, high transmission rate, stable and reliable transmission performance and the like, and the cost is reduced.

The invention discloses a method for reducing the content of sulfite ions in printing and dyeing decoloration wastewater, belonging to the field of industrial wastewater treatment. The method comprises the following specific steps: adjusting the pH value of a water sample to be about 7, sequentially adding calcium chloride, a PAC solution and a PAM solution, conducting stirring for a period of time, carrying out standing for precipitation, and taking a supernatant; and adjusting the pH value of the supernatant to about 6, adding an H2O2 solution, carrying out stirring and standing, and taking a supernatant water sample. According to the results of testing, the content of sulfite ions in the treated wastewater sample is obviously reduced, and the method has the advantages of low comprehensive cost, simplicity and convenience in operation and the like. The method provided by the invention is suitable for treating printing and dyeing decoloration wastewater with a very high sulfite ion content.

The invention discloses a bifunctional chemical warfare agent degradation material with a bionic enzyme structure and a preparation method of the bifunctional chemical warfare agent degradation material. The bifunctional chemical warfare agent degradation material disclosed by the invention is obtained by reacting polyaluminate cation clusters with a phosphotriesterase-imitating structure with polyacid anions with chemical warfare agent degradation function. The preparation method comprises the following steps: mixing an polyaluminate cation cluster solution with a polyoxometallate solution ofthe same concentrations at the volume ratio of 1:1, standing an obtained mixed solution for three days, and filtering and drying the product to obtain the bifunctional chemical warfare agent degradation material. The bifunctional chemical warfare agent degradation material disclosed by the invention can synergistically exert the effects of polyaluminate cation clusters and polyacids, realize degradation on mustard gas and soman through two mechanisms of hydrolysis and oxidation, and can degrade mustard gas and soman to generate non-toxic products without causing secondary harm; after the bifunctional chemical warfare agent degradation material is recycled for four times, good degradation performance of the bifunctional chemical warfare agent degradation material can still be maintained.

The invention discloses a method for recovering vanadium ferrochrome from vanadium-chromium tailings. The method comprises the following steps of grinding vanadium-chromium tailings, adding lime and water, uniformly mixing, and uniformly mixing at 80-100 DEG C for 5-15 min to obtain a digestive material; adding the digesting material into a puffing machine to be sealed, keeping the temperature for10-30 min at the temperature 150-230 DEG C and the pressure 0.5-3.0MPa, opening a discharging port of the puffing machine, and obtaining the puffing material at the discharging port; the puffing material shaking table is subjected to one-time reselection to separate the light phase and the heavy phase, the vanadium ferrochrome is rich in heavy phase, sodium is removed by about 60% and sulfur is removed by about 90%, the vanadium chromium above 80% in the vanadium-chromium tailings can be recovered, and the sulfur is removed by about 90%; the light phase is discarded slag, and the soluble chromium (1.5mg/L, consistent with HJ/T 301-2007 chromium slag pollution treatment environmental protection technical specification) is contained. The method is simple in process and low in cost.