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159results about How to "Realize resource utilization" patented technology

Method and equipment for collecting carbon dioxide from fuel gas by using ammonia water fine spraying

The invention provides a method for collecting carbon dioxide from fuel gas by using ammonia water fine spraying. The method comprises the following steps that: step A, flue gas passes through an absorbing tower from bottom to top, and CO2 within the fuel gas is absorbed by sprayed ammonia water; step B, carbon-containing pregnant solution is processed through thermal desorbing in a desorbing tower; step C, NH3 is removed from the desorbed gas in a washing tower, and the resulting gas is processed through a dewatering procedure by a condenser, such that carbon dioxide gas with high density isobtained; step D, weak ammonia water obtained from the above steps is pumped into an ammonia distilling tower to be concentrated; step E, concentrated ammonia water is diluted with water in an ammonia absorbing tower, such that the concentration of the ammonia water for spraying is adjusted. Correspondingly, the invention provides equipment for collecting carbon dioxide from fuel gas by using ammonia water fine spraying. The method and the equipment provided by the present invention are suitable for power stations with conditions of large flue gas flux and low carbon dioxide concentration, and assists in removing carbon dioxide effectively. According to the present invention, ammonia and water are used circularly, such that energy is saved, and cost for operation and maintenance are substantially reduced. Preferably, CO2 gas separated by the equipment is prepared into industrial grade liquid carbon dioxide.
Owner:TSINGHUA UNIV

Preparation method and application of sludge carbonization and modification magnetic nanometer material capable of activating persulfate to realize printing and dyeing wastewater treatment

The invention provides a preparation method of a sludge carbonization and modification magnetic nanometer material, comprising the following steps: drying, smashing and sieving excess sludge from a wastewater treatment plant, adding activating agent for activating treatment, performing pyrolyzation to obtain sludge activated carbon, loading nanometer MnFe2O4 onto the sludge activated carbon by means of a solvothermal method, so as to obtain the sludge carbonization and modification magnetic nanometer material. The invention also relates to application of the sludge carbonization and modification magnetic nanometer material prepared from the method disclosed by the invention capable of activating persulfate to realize printing and dyeing wastewater treatment. According to the invention, as the excess sludge is taken as primary raw material, resource utilization of the sludge is realized, the preparation method is simple and easy to operate, the cost is low, the sludge-based magnetic material has a stable structure and a small metal leaching rate, high magnetic stability enables the easiness for recycling and circulation, the activation effect remains very good after repeated utilization for many times, and the sludge carbonization and modification magnetic nanometer material is an environment-friendly material, and has a wide application prospect in degradation of organic pollutant.
Owner:SOUTH CHINA UNIV OF TECH

Technological method for degrading feces from livestock and poultry by using complex microbial communities

InactiveCN107090417AImprove deodorization efficiencyRealize resource utilizationBacteriaSpecific water treatment objectivesWater contentHeterotrophic bacteria
The invention discloses a technological method for degrading feces from livestock and poultry by using complex microbial communities, and relates to the technical field of environment-friendly biological treatment. The technological method comprises the steps that 1, the complex communities are put on stacked materials formed through the combination of sawdust, straw, rice husk and other agricultural wastes for even mixing, wherein the moisture is controlled to 30-35%, and the standing time is 12-24 hours; 2, the well-stirred feces from livestock and poultry are sprayed on the stacked materials in the first step, the mixture is fully and uniformly stirred, the water content is adjusted to 55-65%, and stacking fermentation is conducted for 24-48 hours, wherein the complex microbial communities include fecal alkali-producing bacteria, nitrification and denitrification bacteria, autotrophy sulfuration and deodorization bacteria, low-temperature heterotrophic bacteria, actinomycetes, thermophilic bacteria, cellulose decomposition bacteria and bacillus subtilis. By means of the technological method, the hazards of foul gas, sewage and excrement in the feces from livestock and poultry to the environment are solved fundamentally, zero release and zero pollution are achieved, no bad smell, no waste residue and no waste water are discharged, meanwhile, the residual stacked materials can be prepared into organic fertilizers, and waste materials are turned into wealth and recycled.
Owner:湖南明镜生物科技有限公司

A composite cement curing agent used for filling with waste slag obtained after subjecting gold ore tailings to iron separation

The invention relates to the field of tailing resource comprehensive utilization and waste innocent treatment, and provides a composite cement curing agent used for rapidly curing waste slag (gold slag for short) obtained after subjecting gold ore tailings to iron separation. A cured gold slag product is prepared by fully mixing 85 wt% of gold tailing gold slag and 15 wt% of the composite cement curing agent (comprising an alkaline activator, a sulfate activator, and the like) according to a certain ratio through a material mixer, adding water having a certain mass, fully stirring, adding the mixture after fully stirring into a mold, molding, and curing a molded sample in air for 1 d. The unconfined compression strength when a curing period is 1 d of the cured gold slag prepared by using the curing agent is 1.0 MPa or above, unconfined compression strength when a curing period is 3 d of the cured gold slag is 2.0 MPa or above, and unconfined compression strength when a curing period is 7 d of the cured gold slag is 2.5 MPa or above. The curing agent is simple in formula, low in using amount, good in catalytic effects, and rapid in curing, and the early strength of a cured product is high. Unification of tailing treatment and comprehensive utilization is achieved.
Owner:UNIV OF JINAN

Novel garbage sorting, grinding and collecting device

The invention discloses a novel garbage sorting, grinding and collecting device which comprises a first sorting opening, a second sorting opening, a first garbage grinder, a first garbage compressor and a second garbage compressor. The second sorting opening is arranged on one side of the first sorting opening, the first garbage grinder is arranged at the bottom of the first sorting opening, the first garbage compressor is arranged at the bottom of the first garbage grinder, a first storage area is arranged at the bottom of the first garbage compressor, the second garbage compressor is arranged at the bottom of the second sorting opening, and a second storage area is arranged at the bottom of the second garbage compressor. The novel garbage sorting, grinding and collecting device has the advantages that garbage can be divided into a garbage part capable of being ground and another garbage part, the garbage part capable of being ground is manufactured into finished fertilizers, the other garbage part is directly compressed to save space and then is conveyed to a garbage recycling station, accordingly, garbage resources are utilized to the greatest extent, the garbage disposal quantity is reduced, the quality of a living environment is improved, and the novel garbage sorting, grinding and collecting device is environment-friendly.
Owner:SUZHOU GREEN BUILDING TECH RES CENT

Coupling process for producing ethyl alcohol with fibre and generating power with biomass combustion

The invention discloses a coupling technology of cellulosic ethanol production and biomass combustion power generation, which belongs to the renewable energy technology field. The coupling technology takes lignocellulose as raw material for carrying out the cellulosic ethanol production and the biomass direct combustion or the mixed combustion power generation, the lignocellulose raw material separately passes through a lignocellulose feeding device to enter a biomass combustion power generation device for realizing the direct combustion power generation; or the lignocellulose raw material is mixed with coal for combustion, thus realizing the mixed combustion power generation and further realizing the combustion power generation of the lignocellulose; hot steam which is generated by the power generation technology is recovered through a waste heat recovery device and used for heating of the cellulosic ethanol production technology; the generated power enters a national power grid through a transformer or is supplied to the cellulosic ethanol production. Therefore, the coupling technology realizes the cellulosic ethanol production and the biomass combustion power generation. The biomass power generation efficiency achieves 28-32 percent and can provide the power.
Owner:STATE GRID ENERGY CONSERVATION SERVICE

Advanced treatment and reuse method of pre-coated membrane of tail water of sewage plant

The invention discloses an advanced treatment and reuse method of a pre-coated membrane of tail water of a sewage plant. The method comprises the following steps: firstly, feeding tail water into an adjusting pool so as to be homogenized, and then passing through a sand filter; passing through an ultrafiltration membrane by a solution containing a pre-coated membrane material and sand filtered effluent and effectively forming a dynamic membrane on the surface of the ultrafiltration membrane, wherein concentrated water of the ultrafiltration membrane returns to the adjusting pool while the effluent enters into a middle water tank; backwashing the ultrafiltration membrane through a pump by part of water in the middle water tank periodically, wherein the pre-coated membrane automatically falls and the sediment of the coating material is recycled to a pre-coated membrane material dosing device repeatedly, so that the operating cost is lowered; entering into reverse osmosis membrane treatment by water in the middle water tank, fresh reverse osmosis membrane is used as industrial water in the park to be returned, and the concentrated water is treated by an electrochemical reactor, and the effluent reaches the standard to be discharged. By adopting the pre-coated membrane method, the ultrafiltration backwashing frequency is low, and the water yield of the ultrafiltration membrane is improved. Loose filter cake layers with great holes can be formed to effectively relieve the rate of descent of membrane flux, improve the anti-pollution capacity of the membrane and improve the removal effect of the membrane on the water quality index at the same time.
Owner:JIANGSU PROVINCIAL ACAD OF ENVIRONMENTAL SCI

Cyclone flashing-speed reduction direct steelmaking system and process

The invention relates to cyclone flashing-speed reduction direct steelmaking system and process. The system comprises a carbon monoxide preparation device, a cyclone flashing-speed reduction furnace,an electric heating smelting separation furnace and a tail gas aftertreatment device. The tail gas aftertreatment device comprises a preheating/pre-reduction device, a tail gas dedusting and purifyingdevice, a heat exchanger and a tail gas separating device. The process comprises the steps of carrying out electrochemical reduction on carbon dioxide to prepare carbon monoxide and oxygen; sprayingthe carbon monoxide, the oxygen, iron ore powder and a flux into the cyclone flashing-speed reduction furnace, carrying out reduction at 900 to 1500 DEG C, and obtaining pre-reduced iron powder/iron drops with the metallization ratio being larger than 70 percent; entering the electric heating smelting separation furnace so as to carry out smelting separation and final reduction; sequentially preheating/pre-reducing the iron ore powder and the flux through reduced and smelted tail gas, dedusting, preheating the oxygen, and separating to obtain carbon monoxide and carbon dioxide; and returning to a cyclone furnace and a carbon dioxide reduction device for recycling. According to the process, electric energy is utilized for smelting, the process does not rely on fossil fuels, the carbon monoxide is recycled, no pollutant and carbon dioxide is discharged in the process, and clean smelting is realized.
Owner:NORTHEASTERN UNIV

System and process for comprehensively using coking low-quality sulfur and desulfurized solution secondary salt

The invention provides a system and a process for comprehensively using coking low-quality sulfur and desulfurized solution secondary salt. The system comprises a centrifugal spray dryer, a heat pipe heat exchanger, a sulfur burning furnace, a waste heat boiler, a converter and an absorber, wherein the centrifugal spray dryer is used for drying sulfur foam containing elemental sulfur and the desulfurized solution secondary salt into mixed particles containing elemental sulfur and secondary salt crystals; the heat pipe heat exchanger recovers waste heat in flue gas to produce hot air required by the centrifugal spray dryer during drying; the sulfur burning furnace is connected with the centrifugal spray dryer and burns the mixed particles to generate high-temperature gas with the main ingredient being SO2; the waste heat boiler is connected with the sulfur burning furnace and comprises a heat pipe evaporation pipe and used for recovering heat of the high-temperature gas, so that the high-temperature gas is cooled to low-temperature gas with the main ingredient being SO2; the converter is connected with the waste heat boiler and used for converting SO2 in the low-temperature gas into SO3; the absorber is connected with the converter and used for absorbing SO3 and producing concentrated sulfuric acid.
Owner:SHANDONG TIEXIONG METALLURGICAL TECH CO LTD

Sludge resource utilization device and method thereof

The invention relates to a sludge resource utilization device and method. The sludge resource utilization device comprises a sludge storage and delivery unit, a pyrolysis reaction unit, a dust removalunit, a pyrolysis gas injection unit, an industrial boiler or an industrial kiln furnace, a sludge coke collection and feeding unit, and an automatic control unit, wherein the automatic control unitcontrols the above-mentioned units to work. As for the device and method, according to the characteristics of high volatile matter and nitrogen content in sludge, the high-temperature flue gas produced in the industrial boiler or kiln furnace is used as a heat source and carrier gas, the sludge is pyrolyzed at a certain temperature to produce pyrolysis gas and sludge coke, subsequently, the flue gas mixed with the pyrolysis gas is reintroduced into the combustion zone of the industrial boiler or kiln furnace, the pyrolysis gas is used as a reburning fuel and a gas denitration agent to remove the NOx in the flue gas while achieving energy utilization, and the produced sludge coke can be used as a reburning fuel and a solid denitrition agent for flue gas denitrition of the industrial boileror kiln furnace to play a role in removing the NOx while replacing part of coal.
Owner:SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP

Coal water slurry gasification process method suitable for treating waste water containing high-concentration ammonia and nitrogen and COD

The invention discloses a coal water slurry gasification process method suitable for treating waste water containing high-concentration ammonia and nitrogen and COD. The method includes the following steps that 1, coal water slurry is prepared; 2, the coal water slurry is combusted in a gasification furnace; 3, washing and cooling are carried out in a quenching chamber; 4, ash is collected and discharged; 5, crude gas is purified; 6, carbon black water is purified. By utilizing the production characteristic that it is needed to add part of water in coal water slurry preparation and adopting the process of preparing the coal water slurry by replacing clean river water with the waste water, problems existing in slurrying characteristics are effectively solved, the waste water is utilized without the limitation of the concentration of ammonia and nitrogen and COD, and industrialized continuous production is achieved; according to the coal water slurry prepared from the waste water containing high-concentration ammonia and nitrogen and COD, in the environment where the gasification combustion temperature is 1400 DEG C and the operation pressure is larger than 2 MPa, the waste water containing high-concentration ammonia and nitrogen and COD is subjected to pyrolysis, thoroughly treated and converted into useful synthesis ammonia and urea raw materials, and therefore the effect of making waste profitable is achieved.
Owner:ZHEJIANG JINJU CHEM

Spherical nano-porous hydroxylapatite prepared through shells and preparation method thereof

The invention discloses spherical nano-porous hydroxylapatite prepared through shells and a preparation method thereof, and belongs to the technical field of material preparation. According to the hydroxylapatite prepared through the method, the hydroxylapatite is in a spherical shape, the diameter is 4-5 micrometers, the dispersity is good, the specific surface area is 270 cm<2>/g, the average pore diameter is 18 nm, carbonate radicals are contained, the components are similar to those of hydroxylapatite in the bones, and the biocompatibility is good. The preparation method comprises the following steps that the shells are washed, dried and ground, acetic acid with the concentration of 0.1 g/mL is added to fully react with the ground shells, an H3PO4 solution is dropwise added into a prepared calcium acetate solution, trisodium citrate is added, urea is added after reacting under stirring are performed, a prepared solution is stirred to be subjected to a reaction for 5 min in a water bath at the temperature of 80 DEG C-90 DEG C, standing is performed until precipitates occur, and the obtained precipitates are filtered, washed, dried and then collected. According to the method, shell powder does not need to be calcined, the reaction time is short, the pH does not need to be adjusted, operation is easy, the repeatability is good, the raw materials are easy to obtain, and not only is waste utilization achieved, but also energy conservation and emission reduction are facilitated.
Owner:ZHEJIANG SCI-TECH UNIV

Sludge drying method and system

The invention discloses a sludge drying method and system. The sludge drying method comprises the following steps: pre-drying wet sewage sludge with the moisture content of above 80% by adopting a mechanical filter pressing method so as to reduce the moisture content of the sludge to about 65%; crushing the pre-dried sludge into sludge powder, dispersing and flatly paving the sludge powder on baffle plates with fine meshes, piling up multiple layers of baffle plates, leaving voids among the sludge powder, and air-drying the sludge powder by using normal temperature air so as to reduce the moisture content of the sludge to about 45%; and feeding the piled and air-dried sludge powder into a drying groove, turning and throwing by using a turning and throwing device, and meanwhile air-drying the sludge powder by using the normal temperature air so as to reduce the moisture content of the sludge to below 30%. Dry air absorbing moisture in the sludge is discharged, subjected to purification treatment and emitted after meeting the environmental protection requirements, and the dried sludge is discharged from the drying groove and is further treated. According to the sludge drying method, external heat sources are not needed, and the rapid drying of sludge is realized at relatively low operating cost.
Owner:联智同达(苏州)环境科技有限公司

Wastewater zero-discharge system for acid regeneration system and process of wastewater zero-emission system

The invention provides a wastewater zero-discharge system for an acid regeneration system and a process of the wastewater zero-discharge system. The wastewater zero-discharge system comprises a wastewater collecting pool, wherein the wastewater collecting pool is provided with a sedimentation area and a clarified solution area; the sedimentation area and the clarified solution area are separated by a separation wall; a filter screen is arranged above the separation wall; the sedimentation area is used for collecting wastewater discharged by the acid regeneration system; the clarified solution area is connected with a lifting pump; the lifting pump is connected with a filter; when the acid regeneration system normally operates, the generated wastewater passes through the filter, then is collected in a rinse water collecting tank and is used for the acid regeneration system; when the acid regeneration system abnormally operates or fails, the generated wastewater passes through the filter, is collected in an acid storage tank and then is used for the acid regeneration system. Therefore, according to the wastewater zero-discharge system for the acid regeneration system and the process of the wastewater zero-discharge system, the wastewater can be recycled, and the production cost is reduced.
Owner:WISDRI ENG & RES INC LTD
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