11results about How to "Reduce environmental burden" patented technology

The invention relates to the technical field of enzyme engineering, in particular to a malic enzyme mutant and application thereof. Specifically, the malic enzyme derived from Escherichia coli is subjected to site mutation screening, and results show that after methionine at the 144th site is mutated into isoleucine (M144I), glutamine at the 253rd site is mutated into isoleucine (Q253I), and threonine at the 327th site is mutated into phenylalanine (T327F), the catalytic efficiency and the catalytic activity are obviously improved, which is of great significance to industrial application.

The invention discloses a process method for producing sodium sulfide from solid waste after waste lithium battery treatment. The process method comprises the following steps: step 01, material preparation section; 02, a preheating section; step 03, a calcining section; step 04, a heating section; step 05, evaporation section; step 06, a product packaging section; and pumping the sodium sulfide concentrated solution into a tabletting machine in a tabletting and packaging section, cooling and solidifying the sodium sulfide concentrated solution into a solid, blanking, slicing and packaging into a sodium sulfide product. According to the invention, resource utilization of the graphite slag as the solid waste is realized, and the economic benefit of the waste lithium battery product is improved. In the whole sodium sulfide production process method, a raw material preheating method and an indirect heating external heating type calcining rotary furnace are adopted, so that substances such as oxygen in water vapor and flue gas are not in contact with a reaction mixture, and side chemical reactions causing generation of impurities such as sodium carbonate, sodium thiosulfate or sodium polysulfide are avoided as far as possible from the source; therefore, the yield of the product is improved, the impurity content in the product is low, and the purity of the product is improved.

The invention belongs to the technical field of magnesium alloy processing, and relates to a circulating cryogenic-annealing treatment method for reducing anisotropy of a magnesium alloy profile. Providing an extruded magnesium alloy profile formed by extrusion; the extrusion-state magnesium alloy profile is subjected to at least three times of cryogenic-annealing treatment, and each cryogenic-annealing treatment process comprises the following steps: firstly, the extrusion-state magnesium alloy profile is placed in an environment with the temperature of-200 DEG C to-190 DEG C for cryogenic treatment; and then the magnesium alloy profile subjected to subzero treatment is heated to 400-450 DEG C for annealing treatment. According to the method provided by the invention, the magnesium alloy extruded profile tends to be isotropic, the room-temperature ductility of the magnesium alloy extruded profile is improved, and a solid foundation is laid for application of the magnesium alloy extruded profile in more fields with strict requirements on performance uniformity. According to the method, the stability of the process is easily realized, the treatment period is relatively short, and the requirements of the market on products can be met more quickly.

This invention provides a golf ball and a charging device for it. The golf ball includes a shell; a circuit module disposed within the shell, the circuit module including a battery and a component to be powered, the battery supplying power to the component; and a wireless receiving module disposed within the shell, the wireless receiving module including a receiving coil for receiving electrical energy from an external wireless charging pad, the wireless receiving module being electrically connected to the battery to transmit electrical energy to the battery. This invention solves the problem in the prior art where golf balls are difficult to wirelessly charge, thus hindering their reuse.

The invention relates to the technical field of fire fighting, and provides a durable anti-falling fire extinguisher. The fire extinguisher comprises an aerogel tank body, a spraying channel, a pressing nozzle and a durable anti-falling assembly. The durable anti-falling assembly comprises a rotating rod extending into the tank body, a stirring piece and a driving conversion mechanism for converting external impact into power of the rotating rod. Impact energy such as vibration and falling borne by the fire extinguisher in use and transportation is ingeniously converted into power for driving an internal stirring part to rotate through a mechanical structure, so that an aerogel fire extinguishing agent is continuously stirred, deposition failure of key components is prevented, and the storage life of the fire extinguishing agent is remarkably prolonged to more than 10 years. Meanwhile, impact energy is consumed in the energy conversion process, and the buffering and falling preventing performance is enhanced. Preferably, a self-adaptive buffer assembly based on magnetorheological fluid can be further arranged to cope with extreme impact. According to the invention, the unification of fire extinguishing efficiency persistence and physical durability is realized, and the method is particularly suitable for vehicle-mounted and other scenes with mobile and high-reliability requirements.

The invention relates to the technical field of environment-friendly coatings, in particular to a production process of an anti-rust primer, which comprises the following steps: preparing a main agent, adding bio-based epoxy resin, zinc-free anti-rust pigment, filler, dispersing agent and defoaming agent into a reaction kettle according to the mass ratio of (40-50%): (15-25%): (10-20%): (0.5-2%): (0.3-1%), stirring for 60-90 minutes at the temperature of 30-45 DEG C and the speed of 800-1200 rpm, adding a functional auxiliary agent, stirring for 20-30 minutes at the temperature of 30-45 DEG C, and cooling to room temperature. The production process comprises the following steps: S1, mixing a main agent and a curing agent, adding a flatting agent, an adhesion promoter and a hydrophobic modifier into a mixture in S1, continuously stirring for 20-30 minutes at 500-800rpm, preparing a finished product, mixing the main agent and the curing agent according to a mass ratio of (4: 1)-(5: 1), and stirring for 30 minutes at a constant speed at 25-35 DEG C to obtain the anti-corrosive primer. The raw materials are from renewable resources, the consumption of petroleum-based materials is reduced in the production process, and the concept of environmental protection and sustainable development is met; through the synergistic effect of the special zinc-free anti-rust pigment and the bio-based resin, the anti-rust performance of the coating is ensured while the risk of heavy metal pollution is eliminated.

The invention belongs to the technical field of mineral processing and beneficiation reagents, and particularly relates to a double-phenyl-bridged dihydroximic acid flotation collecting agent and a preparation method and application of the double-phenyl-bridged dihydroximic acid flotation collecting agent. The general chemical formula of the biphenyl bridged dihydroximic acid flotation collecting agent is HO-NHC (= O)-Ar-O-R-O-Ar-C (= O)-NHOH; wherein Ar is an aromatic ring group of which the ortho-position is provided with carboxyl or carboxylic ester group; and R is alkylene with 1-8 carbon atoms. The collecting agent with the double-benzene-ring double-hydroximic-acid structure is expected to have higher selectivity, more stable chelation capacity and higher hydrophobicity at the same time, so that the collecting agent shows excellent collecting effect and separation efficiency in the flotation process, and the defects that an existing hydroximic acid agent is insufficient in selectivity, poor in hydrophobicity and the like are effectively overcome.

Provided is an artificial meat food that uses a hemp protein source that has a small environmental burden and a high nutritional value, and that has a flavor and a texture close to natural meat when chewed. The artificial meat food of the present invention is an artificial meat food that uses a plant protein source as a main raw material, and the plant protein source includes a mixture of a hemp protein source composed of hemp seeds and / or hemp kernels and powdered quinoa mixed in a prescribed ratio relative to the hemp protein source.

This utility model relates to a stroller controller with a timed shutdown function, comprising a housing and a circuit board. The circuit board is installed inside the housing, and multiple buttons are located on the top of the housing. The circuit board includes a main control MCU module, a power supply module, a power switch and drive module, a button backlight display module, and a lighting control module. The main control MCU module is electrically connected to the power supply module, the power switch and drive module, the button backlight control module, and the lighting control module. The power supply module provides power to the circuit board. The power switch and drive module controls the stroller's power on / off and the stroller motor's movement. When the stroller remains inactive for the designated shutdown time, the main control MCU module sends a command to the power switch and drive module, which then shuts off the stroller. This effectively reduces the risk of spontaneous combustion, improves safety, significantly extends battery life, avoids damage from over-discharge, reduces the number of battery charging cycles, and improves energy efficiency.

This invention relates to an intelligent water purification system for goose farming ponds, belonging to the field of animal husbandry technology, and solves the problems of water quality deterioration and pathogen proliferation in goose farming ponds caused by excretion and activity. The system includes a pond, an adsorption system, a magnetization system, and an electrolytic disinfection system. The adsorption system consists of a detachable activated carbon tube on the inlet pipe and a submerged activated carbon filter at the bottom of the pond, used to adsorb harmful impurities. The magnetization system consists of multiple permanent magnets fixed in an array at 0.8 to 1.2 meters intervals at the bottom of the pond, used to magnetize the water. The electrolytic disinfection system includes electrodes at the bottom of the pond, a DC power supply providing 10 to 14V voltage and 0.1 to 0.3A current, and a turbidity sensor on the pond wall. When the turbidity exceeds a preset threshold, electrolysis is automatically initiated to generate atomic oxygen to degrade organic matter and sterilize; it automatically stops when the turbidity falls below the threshold. Through the synergistic effect of adsorption, magnetization, and on-demand electrolysis, intelligent water quality maintenance is achieved, primarily for water purification in goose farming ponds.

The application discloses an inlaid biodegradable polyurethane / lignin composite material and a preparation method and application thereof. The preparation method of the inlaid biodegradable polyurethane / lignin composite material comprises the following steps: (1) obtaining NCO-terminated polyurethane prepolymer by taking polycaprolactone, polycarbonate diol and polyisocyanate as raw materials; (2) mixing and stirring lignin with the NCO-terminated polyurethane prepolymer under a solvent-free condition; (3) adding glycerol or 1,4-butanediol into the system to perform a chain extension reaction, so as to obtain a chain-extended product; and (4) vulcanizing the chain-extended product to obtain the inlaid biodegradable polyurethane / lignin composite material. The application provides application of the composite material in preparation of an armored track shock-absorbing block. The polyurethane / lignin composite material prepared by the application has high strength, low compression permanent deformation and biodegradability and the like, and can improve the bearing capacity and durability of the armored track as a whole.