46results about How to "Handling process safety" patented technology

The invention discloses a treatment process of waste water polluted by the pesticide of Dursban, and the process includes the procedures of acid eduction, complexation and extraction, Fenton oxidation and catalytic oxidation. The invention is characterized in that Dursban waste water and herbicide Pendimethalin waste water are comprehensively treated, thereby achieving the proposal of waste controlled by the waste, decreasing the load of organic pollutant being hard to be graded in the waste water, improving the biological degradability of the waste water, removing the pollutant from the waste water, and increasing the biochemical performance of the waste water. Besides, the invention has the advantages of safe and advanced technique, clean operation and low waste water treatment cost.

The related recovery and process method for waste secondary Li-ion cell comprises: separating cell shell, circuit board and cell core by mechanical means; discharging the core; then separating to obtain the shell and coiling material of cell core; putting the last one into some organic solvent to separate the cell polar material from collector foil, filtering to obtain the foil and active material for recovery by chemical way. With small investment, this invention is simple and safe and high yield.

The invention discloses a method for preparing a silk-fibroin-based water-absorbing material by grafting a vinyl monomer. Vinyl-containing carboxylic acid is grafted on the silk fibroin surface by the aid of EDC/NHS (1-ethyl-3-(3-dimethylaminopropyl)carbodiimide/N-hydroxysuccinimide), acrylamide (AM) and acrylic acid (AA) monomers are added, and a horseradish peroxidase/oxydol/acetylacetonate system is utilized to catalyze the silk fibroin-vinyl monomer graft copolymerization, thereby preparing the silk-fibroin-based water-absorbing material by a bioenzyme process. The method comprises the following steps: (1) preparing a silk fibroin solution; (2) grafting vinyl onto the silk fibroin surface by an EDC/NHS process; (3) catalyzing the silk fibroin-AM-AA graft copolymerization by using the horseradish peroxidase; and (4) forming the silk-fibroin-based water-absorbing material. Compared with the traditional process, the method has the advantages of high graft copolymerization efficiency and mild enzyme treatment conditions. The silk-fibroin-based composite water-absorbing material has the advantages of favorable water absorptivity, favorable water retention property and favorable biodegradability.

The invention discloses a method for carrying out real silk fabric anti-crease and antibacterial finishing by virtue of a laccase-TEMPO process. Quinones active groups are generated through catalyzing tyrosine residual groups in real silks by laccase so that chitosan molecules are grafted on the real silks; then 2,2,6,6-tetramethylpiperidine-nitrogen oxide (TEMPO) is added and is used for catalyzing chitosan and tyrosine in the real silks to generate formyl groups, so that the grafting amount and bonding firmness of the chitosan on the real silks are increased, and the real silk fabric anti-crease and antibacterial finishing is realized. The method comprises the following specific steps of: (1) catalytically oxidizing the tyrosine residual groups in the real silks by the laccase; (2) taking the chitosan and the quinones active groups in the real silks to react; (3) catalyzing the real silks by laccase-TEMPO to graft the chitosan; and (4) washing the real silks with water and then treating. Compared with traditional chemical cross-linking-process vacuum fabric anti-crease and antibacterial finishing, the method has the advantages that the grafting efficiency of the chitosan is high, enzyme treatment conditions are moderate, the real silk fabric anti-crease and antibacterial effect is relatively good and the strength of the fabric is improved.

Belonging to the application technology field of yarn dyed fabric dyeing and finishing in the textile industry, the invention provides a dyeing and finishing method for a durable press bombasine yarn dyed fabric, and aims to solve the technical problems of easy fiber damage, undesirable antiwrinkling effect and poor washfastness, easy generation of formaldehyde residue and other ecological pollution. The method provided in the invention combines a chemical technique and a biological enzyme technique to carry out scouring and bleaching and dyeing on a bombazine fabric, that is to say, caustic soda, cellulose and catalase are taken for cotton fiber scouring and bleaching, soda ash, protease and lipase are taken for raw silk degumming and dyeing, and an active dye and laccase are employed to perform bombazine fiber dyeing and aftertreatment. Meanwhile, formaldehyde-free antiwrinkling resin is employed to perform liquid ammonia moist crosslinking on the fabric so as to improve the wrinkle resilience of the fabric. By applying the method provided in the invention to perform dyeing and finishing on the bombasine yarn dyed fabric, the fabric has a smooth surface and soft handfeel, also, the chroma of a dyeing waste liquid is reduced. When high antiwrinkling performance is acquired, the fabric strength is less reduced. The treatment process is safe and environment-friendly, thus being in line with the processing requirements of ecological textiles.

The invention relates to a method for treating coal chemical wastewater, which comprises the following steps in turn: pretreatment, biochemical treatment with a first biochemical unit, adsorption treatment with an adsorption unit, sedimentation treatment with a sedimentation tank, and advanced biochemical treatment. The method solves the technical problems of high ozone electric power consumption, high cost and influence on yielding water quality because ozone is used for performing advanced treatment in the method for treating the coal chemical wastewater in the prior art. In the method for treating the coal chemical wastewater, the ozone is not used, resources are saved, and the yielding water quality can be well guaranteed, so the method is particularly suitable for treating the coal chemical wastewater.

The invention discloses a sludge drying/pyrolysis/gasification/incineration integrated treatment system which comprises a burning system, a drying system, a pyrolysis and gasification system and a fume cleaning system, wherein the burning system comprises a gas generator and an incinerator; the drying system comprises a blower and Stage 1-5 drying machines; the pyrolysis and gasification system comprises a pyrolysis gasifier and a separator; and the fume cleaning system comprises a dedusting devulcanizer, a draught fan and a chimney which are respectively connected with each other through pipelines. The integrated treatment system disclosed by the invention has the characteristics of high safety and reliability, energy saving, emission reduction, low carbon, environment friendliness, low operating cost and the like, and realizes reduced, stabilized, harmless and recycling treatment.

The invention discloses a comprehensive harmless treatment and recycling method for chromium-containing wastewater on an electrolytic tinplate production line. The method comprises the following treatment steps: (1) inputting the chromium-containing wastewater into a filtering device for filtering; (2) inputting the filtered wastewater into an oxidization bed for treating; (3) inputting the wastewater treated by the oxidization bed into a dechromization bed for treating; (4) inputting the wastewater treated by the dechromization bed into a purification bed for treating; and (5) inputting the wastewater treated by the purification bed into a reduction bed for treating. The comprehensive harmless treatment and recycling method has the beneficial effects of safe and reliable treatment process, easiness in running and maintenance, reasonable equipment design, superior performance, high controllability, high automation degree, attractive and elegant layout of equipment, convenience in operation and management, reasonable investment and running cost and low treatment cost.

The invention discloses a cocoon cooking and silk opening processing method. The processing method comprises the following steps: firstly performing impregnation loosening treatment on mulberry silkworm cocoons in a low-concentration a soda ash solution; then performing enzyme treatment on the mulberry silkworm cocoons in a mixed solution of protease and lipase; secondly, after washing the mulberry silkworm cocoons with water, peeling the cocoons to obtain cocoon caps; then opening the cocoon caps and then processing the opened cocoon caps into silk pockets; and finally, performing drying. Themethod can realize cocoon cooking processing under mild conditions; a cocoon shell structure is loosened, and thus, the removal effect of sericin components in mulberry silkworm cocoons is enhanced,the chemical oxygen demand (COD) value of cocoon cooking waste liquid is reduced, and the processing of floss silk products based on energy saving and emission reduction is realized.

The invention discloses a sludge deep dehydration coupled biomass pyrolysis system and a method thereof. The sludge deep dehydration coupled biomass pyrolysis system comprises a sludge conditioning device, a filter pressing dehydration device, a sludge drying dehydration device, a pyrolysis device, a pyrolysis gas combustion device and a flue gas purification device, wherein the sludge conditioning device, the filter pressing dehydration device, the sludge drying dehydration device, the pyrolysis device and the pyrolysis gas combustion device are sequentially communicated, and the flue gas purification device is connected with the sludge drying dehydration device. The sludge deep dehydration coupled biomass pyrolysis system has the advantages of sludge dehydration reduction, full utilization of a heat value, few technological processes and low operation cost, can realize recycling of pyrolysis productivity, meets the national requirements of sludge reduction and harmless treatment, andachieves the goal of resource utilization.

The invention discloses an integrated control aquaculture wastewater combined treatment technology and device. The technology includes the following step of S1, pretreatment; S2, oxidation; S3, filtration; S4, adsorption. The device mainly comprises a filtering tank, an adjusting tank, a decomposition tank, a pulse electric floating tank, an adsorption tank, water suction pumps and a PLC; the adjusting tank is communicated with the filtering tank through a first water inlet pump, the pulse electric floating tank is communicated with the decomposition tank through the fourth water suction pump,and the adsorption tank is communicated with the PLC through the fifth water suction pump and the pulse electric floating tank and is electrically connected with the filtering tank, the adjusting tank, the decomposition tank, the pulse electric floating tank, the adsorption tank, the water suction pumps and the PLC. The treatment technology is safe, free of pollution, excellent in degradation effect and capable of meeting emission standards.

The invention discloses a wastewater treatment process which comprises the following steps: sampling 1000mL of water, adding lime milk liquid and stirring, then adding Dyl coagulant and stirring, thenadding 0.1 percent PAM solution, stirring and then settling and separating, taking 910mL of supernate, oxidizing, recording the time, the electric current and the voltage, then dosing for coagulation, and taking the supernate for sand filtration and carbon adsorption. The wastewater is treated by adopting the treatment methods of coagulating, oxidizing, coagulating again, sand-filtering and carbon-adsorbing, therefore, the removal rate of CODCr is higher, and all indexes reach national discharge standards; and the method has simple process and small coverage area of a device.

The invention discloses a fibroin based water absorbing material preparation method based on coupling and enzymatic graft copolymerization and belongs to the technical field of textile chemistry. According to the method disclosed by the invention, diazo salt is prepared by diazotization of arylamine containing vinyl, then the diazo salt generates coupling reaction with fibroin, and finally enzymatic fibroin and hydrophilic vinyl monomer generate graft copolymerization to improve hydrophilia of a fibroin material. The preparation method comprises the following specific technologies and steps: (1) fibroin solution preparation; (2) preparation of diazo salt containing vinyl; (3) fibroin coupling reaction; (4) graft copolymerization between the enzymatic fibroin and hydrophilic vinyl monomer;(5) fibroin based water absorbing material formation. Compared with introducing vinyl monomer on fibroin through a chemical crosslinking method and then utilizing persulfate or chemical methods of anultraviolet radiation method and the like to trigger the graft copolymerization between the fibroin and the hydrophilic vinyl monomer, the preparation method disclosed by the invention has the advantages of high graft copolymerization efficiency and moderate enzyme treatment conditions; furthermore, the fibroin based water absorbing material has the advantage of good water absorption.

The invention discloses a silk floss finishing method. The silk floss finishing method comprises the following steps of: A, preparing an amino-containing antibacterial agent finishing liquid, whereinthe amino-containing antibacterial agent comprises polylysine, chitosan with deacetylation exceeding 85% and chitosan quaternary ammonium salt with deacetylation exceeding 85% and substitution degreeof 60-90%, and dipping silk floss into the finishing liquid; B, adding laccase into the finishing liquid in the step A, and continuously dipping the silk floss subjected to dipping treatment in the step A; C, cleaning the silk floss treated in the step B in water; and D, drying the silk floss treated in the step C. The silk floss finishing method disclosed by the invention has the advantages thatby virtue of the laccase, the amino-containing antibacterial agent is grafted on the surface of silk floss fiber by catalysis, so that the silk floss product is endowed with antibacterial effect; andthe silk floss finishing method has the characteristics of safe treatment process and lower production energy consumption, and ecological functional processing of the silk floss product is realized.

The invention belongs to the technical field of steroid hormone preparation, and particularly relates to a preparation method of 19-nor-4-androstenedione, which comprises the following steps: mixing a compound A, ethanol and pyridine, adding palladium on carbon, introducing hydrogen, and reacting to obtain a compound B; the compound B and isopropanol are mixed, an acid solution is added, the acid solution is a hydrochloric acid solution or a salt solution of alkali metal which is dissolved to be acidic, reaction and treatment are conducted, and 19-nor-4-androstenedione is obtained, the reaction route is as follows: the yield and purity of the product can be effectively improved, and the product is white.