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483results about How to "Protect environment" patented technology

Method for recovering rare earth from waste rare earth luminescent material

InactiveCN102660688AHigh recovery rateProtect environmentGlass recyclingCerium oxides/hydroxidesRare-earth elementGlass matrix
The invention relates to a method for recovering rare earth from waste rare earth luminescent material, comprising the following steps: collection of waste rare earth luminescent material, including quick identification on rare earth fluorescent lamp and dismantling and breaking of the rare earth fluorescent lamp, breaking of a CRT display, and peeling and collection of the waste rare earth luminescent material and a glass matrix; pretreatment on the waste rare earth luminescent material, including demercuration oxidation precipitation, alkali fusion and acidolysis; extraction separation of rare earth elements to obtain rare earth chloride enrichment; extraction purification of the rare earth elements to obtain high-purity rare earth chloride; precipitation separation of the rare earth elements to obtain oxalate rare earth or carbonic acid rare earth precipitates; and sintering of the oxalate rare earth or carbonic acid rare earth precipitates to obtain high-purity-level rare earth oxide. The method realizes separation of rare earth elements including Ce, Eu, Tb and Y from impurity elements including Mg, Ba, Ca and the like and complete separation and recovery of light, mediate and heavy rare earth elements, and purification is carried out to obtain the high-purity rare earth oxide, so that the resources are comprehensively recycled, the process flow is reasonable, economic and practical, the rare earth recovery rate is high and the added value of the product is high.
Owner:UNIV OF SCI & TECH BEIJING

Method for preparing high purity iron ore by reducing and magnetizing red mud in rotary kiln

The invention discloses a method for preparing high purity iron ore by reducing and magnetizing red mud in a rotary kiln. The method comprises the following steps of: performing filter pressing and dehydration on red mud to obtain a filter-pressed cake; feeding the filter-pressed cake into a drying drum for drying; smashing into small blocks of less than or equal to 10 millimeters; adding red mud blocks of less than or equal to 10 millimeters into the rotary kiln through a charging machine; heating red mud in the rotary kiln to 700-850 DEG C; introducing coal gas into the kiln head of the rotary kiln to reduce over 95 percent of Fe2O3 in the red mud into Fe3O4; after 75 percent of reduced coal gas passes through the length direction of the rotary kiln, introducing air from the tail of the kiln for burning in the rotary kiln; and continuously heating red mud blocks newly-added into the rotary kiln by using combustion heat. Specific to the aim of preventing oxidation, reduced and magnetized red mud leaving the rotary kiln is directly cooled through water quenching, and is subjected to magnetic separating after cooling, so that high purity iron ore of which the grade is higher than or equal to 63 percent can be obtained. In the method for preparing high purity iron ore from red mud through a Bayer process, the recovering rate of iron elements is over 90 percent, and the high purity iron ore Al2O3 is less than 2.5 percent; and according to the flow, continuous production can be realized, high purity iron ore is produced by treating red mud, and the environment is protected.
Owner:UNIV OF SCI & TECH BEIJING

Free piston linear generator based on waste heat utilization

The invention relates to a free piston linear generator based on waste heat utilization and belongs to the technical field of energy power. The free piston linear generator specifically comprises a free piston combustion engine, the linear generator and a waste gas expansion cylinder. The free piston combustion engine comprises an oil atomizer, a gas inlet, a gas outlet, a piston and a combustion engine cylinder. The linear generator comprises a motor stator and a motor rotor. A waste gas utilizing assembly comprises a gas guiding pipe, a gas inlet door, a gas outlet door, a reset piston, a reset cylinder and a water sprayer. A working process includes a starting process and a steady operation process. In a cold start-up process, a linear engine works in a motor mode and drives a device to be started and work. In the steady operation process, the linear generator works in a generator mode, the combustion engine works to drive the linear generator to do work and generate power, then a moving assembly returns to a top dead center through a waste gas waste heat utilization method, and next circulation movement is conducted. The free piston linear generator has the advantages of being capable of protecting environment and saving energy.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY

Chromic slag aerated brick and preparation method thereof

The invention provides a chromic slag aerated brick. The chromic slag aerated brick is prepared from the following raw materials: 20 to 30 weight parts of chromic slag, 25 to 30 weight parts of coal ash, 5 to 10 weight parts of cement, 4 to 6 weight parts of modified attapulgite, 5 to 10 weight parts of barium carbonate slag, 5 to 10 weight parts of ceramics factory waste, 5 to 10 weight parts of calcium carbonate powder, 10 to 15 weight parts of lime, 0.1 to 0.3 weight percent of triethanolamine lime, 4 to 5 weight parts of gypsum, 0.02 to 0.08 weight part of aluminum powder, oxyparaffin soap which is 3 to 5 percent based on the weight of the aluminum powder, 0.01 to 0.02 weight part of calcium bicarbonate, 2 to 3 weight parts of volcanic rock, 1 to 2 weight parts of lignocellulose, 0.3 to 0.5 weight part of sodium silicate, 0.03 to 0.05 weight part of borax, 1 to 2 weight parts of sodium hexametaphosphate, 1 to 2 weight parts of hydroxypropyl methyl cellulose sodium and 1 to 2 weight parts of superfine polyvinyl alcohol. Chromic slag is added into the raw materials of the aerated brick, other conventional aids and modified nano aids are added, and the aerated brick processed by an appropriate process is low in cost and high in performance, achieves the cyclic economy effect of changing waste into wealth, and reduces pollution; and the processed aerated brick has the characteristics of light volume weight, high thermal insulation performance, good sound insulation effect and high intensity and can be used for a non-load bearing wall body or a load bearing wall body.
Owner:山东金杰利材料科技有限公司

Assembled type moveable plank house

The invention relates to a building, in particular to a temporary building namely an assembled type movable plank house capable of being used repeatedly, which belongs to the technical field of construction engineering. The plank house consists of a foundation, wall bodies, a roof, a door and a window, wherein all the components are prefabricated by a factory and are assembled together by using prestressed reinforcing bars and bolts on the spot. The foundation is fabricated by using reinforced concrete and comprises an L-type basic unit, a T-type basic unit and an I-type basic unit, single-bay or multi-bay strip foundations with different sizes can be assembled by using the prestressed reinforcing bars as required, the cross section of the foundations is U-shaped, and the middle parts of the foundations are provided with grooves for embedding and fixing the wall bodies on the upper parts. The wall bodies consist of wall boards and end posts and are assembled into a whole body by using the prestressed reinforcing bars, holes are formed on walls in the front and back longitudinal directions for embedding the door and the window, and the lower parts of the wall bodies are inserted into the grooves of the foundations and are fixed by using wedge-shaped sealing strips. The roof consists of roof boards which are assembled into a whole body by using the prestressed reinforcing bars, and is connected with the wall bodies through bolts which are used for connecting channel steel and roof battens.
Owner:XUZHOU JIUDING CONSTR GROUP

Active calcium oxide with calcium carbide dreg as raw material, desulfurizing agent, calcium carbide raw material and preparation method of active calcium oxide

ActiveCN105948091AProtect environmentReduce usageCalcium/strontium/barium oxides/hydroxidesMaterials scienceCalcium carbide
The invention relates to the technical field of active calcium oxide, desulfurizing agents, calcium carbide raw materials and preparation methods of active calcium oxide, in particular to active calcium oxide with calcium carbide dreg as a raw material, a desulfurizing agent, a calcium carbide raw material and a preparation method of active calcium oxide. The active calcium oxide with the calcium carbide dreg as the raw material is obtained through the following steps: firstly, the calcium carbide dreg is subjected to filter pressing, and primary wet dreg is obtained. According to the active calcium oxide with the calcium carbide dreg as the raw material, the desulfurizing agent, the calcium carbide raw material and the preparation method of active calcium oxide, the calcium carbide dreg is turned into wealth, accordingly, the problem of adverse influence on the environment due to stacking of a large amount of calcium carbide dreg is solved, and the environment is effectively protected; besides, utilization of mineral resources such as limestone is reduced, the mineral resources such as the limestone are saved, and the idea of harmonious development of economic development and environment protection is realized; meanwhile, according to the active calcium oxide with the calcium carbide dreg as the raw material, the desulfurizing agent, the calcium carbide raw material and the preparation method of active calcium oxide, the purity of the desulfurizing agent can be improved; moreover, the cost of the calcium carbide raw material for producing calcium carbide is lower, and industrial application prospect is realized.
Owner:新疆中泰创安环境科技股份有限公司

Street lamp device with photovoltaic power generation as power supply source and used for collecting fine particles in air

The invention relates to a street lamp device with photovoltaic power generation as a power supply source and used for collecting fine particles in air, and belongs to the technical field of environment protection application. A solar cell generates currents under irradiation of sunshine, and the currents are input into a photovoltaic controller through a conductive line for adjustment and then input into an energy storage battery for storing. When particle collection is needed, the currents output from the energy storage battery are input into an absorption control device through a power distribution device, and the absorption control device supplies power to an air pump and a current control device. When the air pump starts to work, external air is absorbed into an electrostatic adsorption device, meanwhile, the current control device changes voltage of the input currents according to set requirements and then the currents are transmitted to the electrostatic adsorption device, air entering the electrostatic adsorption is ionized in an ionization chamber, the particles in the air are charged, the charged particles move to an absorption chamber under the action of electric field force and air flow formed in the electrostatic adsorption device and are attached to absorption poles in the absorption chamber due to discharging, and the purified air is exhausted from an air outlet of a street lamp rod along with the air flow.
Owner:WUXI TONGCHUN NEW ENERGY TECH

Manufacturing method of once-formed graphite crucible

The invention relates to a manufacturing method of a once-formed graphite crucible. The manufacturing method is characterized by comprising the following steps: (1) batching: preparing the following components in percentage by mass: 70%-90% grinding powder prepared by grinding graphite scrap and 10%-30% of medium temperature coal pitch; (2) mixing kneading; (3) compression; (4) roasting; and (5) processing. The major material adopted in the manufacturing method is the graphite scrap which is waste obtained during the production of an electrode, so that the waste reutilization is realized, the average cost of each same-scale product is lowered by 800-1000 yuan, the energy source is saved, the environment is protected, and meanwhile, the manufacturing cost of the graphite crucible is lowered. Compared with a graphite crucible produced from a traditional graphite electrode, two procedures of impregnation and graphitization in which the environmental pollution may be caused and the energy sources are greatly consumed are reduced; and compared with a graphite electrode crucible, the average production cycle is shortened by 30-40 days, the energy conservation and emission reduction are achieved, and the production efficiency is greatly improved. According to the graphite crucible produced by virtue of the technical scheme, the longitudinal layout of aggregate particles is avoided, the structure of a product is isotropic, an anti-seepage effect is achieved, and the smelting use requirements of heavy and noble metals are well met.
Owner:吉林科工碳业有限公司

Intelligent rainwater car washing system

The invention provides an intelligent rainwater car washing system which is characterized by comprising a rainwater collection unit (1), a rainwater purification unit (2), a clean water pond unit (3), a car washing room unit (4), a waste water reusing processing unit (5) and an intelligent control unit (6), wherein a water outlet pipe (1-3) of the rainwater collection unit (1) is connected with a water inlet pipe (2-1) of the rainwater purification unit (2), a water inlet pipe (2-5) of the rainwater purification unit (2) is connected with a water inlet pipe (3-1) of the clean water pond unit (3), a water supplying pipe (3-3) of the clean water pond unit (3) is connected with a water inlet pipe (4-4) of the car washing room unit (4), and car-washing waste water of the car washing room unit (4) flows into a waste water collection pipe (5-1) of the waste water reusing processing unit (5). On-line motoring data and sending instructions of other units are collected by the intelligent control unit (6) to control operation of all unit equipment. The intelligent rainwater car washing system has the advantages of opening up new water resources, saving fresh water resources, and being environment-friendly, and has good society benefits and environment benefits.
Owner:朱加林
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