915results about How to "Low running cost" patented technology

The invention relates to a device for removing several pollutants of boiler smoke. Wherein, it comprises (1), before or after the static deduster 5 of smoke channel 4, ejecting into ozone O3 at low temperature section as 110-150Deg. C, while the ratio between ejected amount and nitrogen oxide is 0.5-1.5, to oxidize the low-level nitrogen oxide insoluble into soluble high-level nitrogen oxide, and the sulfur oxide is transformed into sulfur trioxide, and the reaction time is more then 0.5s; (3), feeding treated smoke into alkali washing tower 7 to wash, and absorbing high-level nitrogen oxide and sulfur oxide.

The invention relates to an unmanned aerial vehicle-mounted laser radar system, which consists of an unmanned aerial vehicle flying platform subsystem, a laser radar subsystem and ground protection and communication subsystems, wherein the unmanned aerial vehicle flying platform subsystem takes an unmanned helicopter as a carrying platform, the laser radar subsystem is used for acquiring three-dimensional spatial information and digital image data and consists of a laser scanner, an IMU (Inertial Measurement Unit), and a high-resolution aerially-photographing digital camera, and the ground protection and communication subsystems are used for protecting flying safety and timely returning working state information of the system. With the adoption of the unmanned aerial vehicle-mounted laser radar system, the patrol efficiency can be increased, the patrolling means is scientific, intuitive and accurate, the potential problems can be timely discovered so as to ensure safe operation and reduce economic losses, and thus, the unmanned aerial vehicle-mounted laser radar system has the characteristics of low cost, simplicity for operating, high accuracy of data and the like.

The sterilizing method for medical equipment is to combine the sterilizing function of ozonized water and organic matter degrading function of enzyme. The equipment be used to sterilize endoscope andsurgical instruments, and the sterilizing includes the steps of: washing with enzyme solution, washing with water, sterilizing with high concentration ozonized water, stoving and no-harm treatment. The cleaning sterilizer for implementing the said method includes an enclosed sprayer, an ozone generator, a stove and a microcomputerized control system and includes a no-harm treater.

The invention discloses an electronic commerce logistics system comprising an irregular goods sorting system. The electronic commerce logistics system comprises a logistics platform, an information processing platform, a payment platform and an electronic commerce platform, wherein the logistics platform, the information processing platform and the payment platform are connected with the electronic commerce platform and exchange data with the electronic commerce platform through internet. The logistics platform comprises a goods identity marking system, a goods delivering system, a goods warehousing system, a goods sorting system and a goods distributing system. A goods identity recognition unit consisting of a plurality of card readers and code readers is hung on a cross beam of a goods carrying roller of the goods sorting system through a cable or hanging rope. The plurality of card readers and the code readers are distributed in a reticular shape. The electronic commerce logistics system comprising the irregular goods sorting system has the advantages that: the cost is low, different types of goods and goods with irregular shapes can be sorted, the integration of information flow, capital flow and material flow is realized, the sorting efficiency is high, and the like.

The invention discloses a method for recycling crystallized salt resources in high-salt-content wastewater zero discharge. Salt-containing wastewater is treated through one or more of a pretreatment system, a membrane concentration system, a nanofiltration membrane system and an evaporation crystallization system to obtain recycled water and solid salt. The invention further discloses a system for recycling crystallized salt resources in high-salt-content wastewater zero discharge. The system comprises the pretreatment system, the membrane concentration system, the nanofiltration membrane system and the evaporation crystallization system, wherein one or more of the systems is/are used for treatment; the evaporation crystallization system comprises one or more evaporation devices and one or more crystallization devices. The multiple evaporation devices are connected in parallel or in series or connected in a parallel connection and serial connection mixed mode, and the multiple crystallization devices are connected in parallel or in series or connected in a parallel connection and serial connection mixed mode. 15-25% of three-high wastewater treated by a traditional water treatment technology is further treated, the recovery rate of the wastewater reaches over 95%, meanwhile, salt is crystallized to be solid abraum salt, and then high-salt-content wastewater zero discharge is achieved.

The invention relates to a middle-low-temperature flue gas desulfurization, dedusting and denitration and denitration catalyst thermal-desorption integrated device. The integrated device comprises a desulfurization, dust-collection and purification section, an desorption, ammonia-spraying and mixing section and a denitration reaction section which are integrated in a tower body from bottom to top, wherein the desulfurization, dust-collection and purification section comprises an ash bin, a closed dust discharging valve, a flue gas inlet, an airflow uniform-distribution and flow-guiding plate, filter bags and a pulse-jet device; the desorption, ammonia-spraying and mixing section comprises an ammonia-spraying structural body, a thermal desorption gas conveying-jetting structural body and mixed flow-equalizing structural bodies; the denitration reaction section comprises a denitration catalyst and a purified flue gas outlet. Compared with the prior art, the integrated device has the beneficial effects that (1) the processes of desulfurization, dedusting and denitration of flue gas as well as the thermal desorption of the denitration catalyst are integrated; (2) the service life of the denitration catalyst is long; (3) the denitration efficiency is high; (4) ammonia gas and flue gas as well as high-temperature thermal desorption gas and flue gas are in full contact with each other; (5) the denitration catalyst can be regenerated through online thermal desorption; (6) a denitration catalyst dust-cleaning system can be omitted.

The invention discloses a satellite-image automatic, geometric and precise correction method. The method comprises the following steps: (1) a nominal picture of a satellite image is obtained; (2) thenominal picture is processed to obtain the satellite image, and the binarization processing is carried out on the satellite image; (3) the match operation is carried out on a landmark template database after the binarization processing and the satellite image to be matched after the binarization processing, so as to obtain the landmark offset; (4) the result in the step (3) is processed by adopting the quality control measure, so as to obtain a landmark pair that is successfully matched; and (5) the geometric and precise correction is carried out on the nominal picture by adopting the landmarkpair that is successfully matched, so as to obtain the revised locating result. With the adoption of the method, the geometric correction result with higher precision can also be obtained without thelarge amount of careful probing work for the terrain, thereby lowering the running cost of a satellite-image automatic landmark matching system greatly.

The invention discloses a multi-time-scale grid-source-load-storage coordinated control method comprising the following steps that (1) the adjustable resources existing in a power distribution network and the adjustment scope under different time scales are analyzed; (2) a day-ahead optimization model is established; (3) day-ahead optimization is performed on the distributed power supplies, energy storage and flexible load under the active power distribution network by using a particle swarm algorithm according to the day-ahead optimization model and day-ahead forecasting information so as to ensure the total operation cost to be minimal within the optimization period; (4) an intra-day optimization model is established; and (5) rolling correction is performed on the operation state of the distributed power supplies, energy storage and the flexible load and the operation mode of the power distribution network of the current period of time according to the power flow distribution situation of the current power distribution network, the node voltage situation, the operation state of the distributed energy and the charge and discharge situation of energy storage with combination of ultrashort-term load forecasting and power generation forecasting. The effect of multiple adjustable and controllable resources in operation of the active power distribution network can be fully exerted so as to guarantee effective consumption and efficient utilization of the distributed power supplies.

The invention discloses a rapid traffic lane line detection method based on GrowCut, which comprises the following steps of: acquiring surveillance video and choosing at least one frame of image as a key frame; demarcating an edge segmentation seed point in the key frame image; performing edge segmentation according to the GrowCut algorithm; performing smoothing filtering on the segmentation result by a median filter; performing edge extraction on the result of the smoothing filtering; performing bisection treatment on the edge extraction result; and fitting the traffic lane line through a polynomial curve fitting method according to the result of the bisection treatment to get the final traffic lane line. The invention further provides a system for rapid traffic lane line detection based on GrowCut. A traffic lance line detection system implemented through the method provided by the invention is high in reliability, low in operating cost and capable of being widely used in the fields of intelligent traffic and public security.

The invention relates to a method for processing sludge and kitchen wastes. The method comprises the following steps: by utilizing sludge and kitchen wastes as principal raw materials; separating waste oil from kitchen wastes to be taken as the raw material of fuel or bioplastics; taking biological fuel gas, which takes methane as main material and is generated through fermentation, as an external fuel supply; absorbing the nutrient in biogas slurry by the charcoal generated through pyrolysis and then taking the charcoal as a charcoal fertilizer. The method for processing sludge and kitchen wastes provided by the invention meets the increasingly urgent requirement of processing the sludge and kitchen wastes in China at present; the method can be used for efficiently solving the problems of separately processing sludge and kitchen wastes; the classification and valuable utilization of by-products are realized; various by-products are low-carbon high-efficient cleanly utilized; the purposes of best use, energy conservation, environment protection and cost lowering are achieved; the method has excellent economic benefit and environmental benefit.

The invention discloses an oily sludge treatment process and a device. The oily sludge treatment process includes the steps of watering and stirring for dilution, ultrasonic wave demulsification, solid-liquid separation and oil-water separation. The device comprises an oily sludge treatment system, an automatic control system and a power supply device, wherein the oily sludge treatment system comprises a stirrer, an ultrasonic wave demulsification device, a centrifugal machine, a ultra-filtration system, an oily sludge storage tank, a sludge tank, a centrifugation liquid storage tank, a concentration tank and a filtrate tank, the stirrer is used for adding water into oily sludge for diluting the oily sludge, the ultrasonic wave demulsification device is used for demulsifying the oily sludge, the centrifugal machine is used for performing solid-liquid separation to the oily sludge, the ultra-filtration system is used for performing oil-water separation to the oily sludge, the oily sludge storage tank is used for storing the oily sludge, the sludge tank is used for storing the sludge, the centrifugation liquid storage tank is used for storing oily sewage, the concentration tank is used for storing oil, and the filtrate tank is used for storing water. According to the oily sludge treatment process and the device, the design is novel and reasonable, achievement costs are low, the treatment speeds are fast, the separation of the oil, the sludge and the water is thorough, the resource utilization of the oily sludge is achieved, and environmental pollution and resource waste are reduced.

The invention discloses a compressed air energy storage-containing independent microgrid capacity optimal configuration method. The method includes the following steps that: a compressed air energy storage model is established, and a mathematical relationship between energy storage power and energy is obtained; a microgrid capacity optimization upper-level model is established according to the compressed air energy storage model and the mathematical models of other distributed power sources, and a microgrid optimal capacity configuration problem is solved; a microgrid operation optimization lower-level model is established, and relevant constraint conditions are set, and a microgrid optimal operation mode under constant capacity is determined; a genetic algorithm is adopted to solve an upper-level integer programming problem, and a mixed integer linear programming solver is adopted to solve a lower-level mixed integer linear programming problem, and iteration calculation is performed on the upper-level model and the lower-level model, and a microgrid optimal capacity configuration result which satisfies convergence conditions can be obtained. Compared with an established strategy-based configuration method, the integrated optimization model of the invention can fully count the influence of operation modes on capacity optimization so as to obtain more economical and environmentally friendly configuration schemes.

The invention relates to an air conditioning system for independently controlling temperature and humidity, belonging to the air conditioning system field, which comprises an evaporator, an expansion valve, a condenser, a compressor, a gas-liquid heat exchanger, a condensing heat exchanger, a solution regeneration device, a valve 1 to 5, a heat exchanger and a connecting pipeline. The system recovers heat dissipating capacity of the condenser of an air source heat pump unit, and the heat dissipating capacity is used as the heat of the solution regeneration in order to realize the regeneration of desiccant solution, which reduces the requirements of the solution regeneration on other waste heat. The invention saves energy in the regeneration process of the desiccant solution, improves the energy efficiency ratio of the air conditioning system, has the simple structure, and reduces the heat pollution of the environment.

An optical scan apparatus which deflects a plurality of light beams to scan a write region on a scan surface in a main scan direction is configured to include a light source which has a plurality of emission portions emitting the plurality of light beams arranged two-dimensionally on a plane in parallel to the main scan direction and a sub scan direction perpendicular to the main scan direction; a deflector which deflects the plurality of light beams from the plurality of emission portions; a light receiving element which receives the light beams and outputs a synchronous detection signal in accordance with the received light beams; and a control unit which selectively controls any one of the emission portions to emit a light beam upon each scanning and allows the light beam from the selected emission portion to be incident on the light receiving element via the deflector.

The invention discloses an urban sewage treatment system which is built on rivers and equipment thereof. A trash rack is arranged on the river; then the trash rack is provided with an anaerobic treatment section, an aerobic treatment section, a separation section and a slag discharge section in sequence; clear water is further purified and carried out reoxygenation by a constructed wetland before flowing into a lake or being discharged. The sewage treatment system established by the invention does not take up land and can be built at the end part of the unnavigable river (the inflow river channel of any lake dian can be suitable); the main equipment is arranged at the riverbanks of both sides or on a lifting platform which is set up on a channel and in the river (on the surface of the water and immersing into the water); the treatment technology is the combination of a biological method, a chemical method and the constructed wetland; the treated wastes can generate energy again. The system has the highly saving investment and the lowest operation cost.

The invention relates to a lift movable wind-proof net device, which comprises a wind-proof net, a movable device and a transmission lifter. Wherein, the wind-proof net and the transmission lifter are arranged on one platform; said platform is mounted with front and back rows of several support posts, while the top ends of each two front and back relative support posts are mounted with connecting support; said wind-proof net is fixed at the front row of support posts; two support posts of back row of support posts that near the platform are fixed with one end of incline support post; another end of incline support post is fixed at one end of platform; the middle of platform is arranged with transmission lifter, to control the wind-proof net. The invention has lower cost to control the powder pollution and save water, while it can be used for more than 20 years. The invention can effectively reduce the wind speed and reduce the wind impulse speed, to protect the environment.

The invention provides a yarn foam sizing process which is characterized in that: a sizing agent comprises polyvinyl alcohol, modified starch, acrylic acid, water and a foaming agent, wherein the ratio of the total mass of the polyvinyl alcohol, the modified starch and the acrylic acid to the mass of the water is 1:(3-20), and the ratio of the volume of the foaming agent to the total volume of the other four components is (1-3):100. The sizing agent is heated to 90-120 DEG C and then cooled to 40-60 DEG C and filled into a foam maker, then the foam is sprayed from top to bottom in a position between two sizing-agent pressing rollers which rotate oppositely, and the yarn penetrates through the position between the two sizing-agent pressing rollers from bottom, wherein the pressure between the two sizing-agent pressing rollers is 12,000-20,000N. According to the process, the yarn penetrates through the position between the two sizing-agent pressing rollers from bottom, then the form is attached to the warp yarn before being properly squeezed by the sizing-agent pressing rollers, and after the foam bursts, a proper amount of sizing agent is attached to the surface of the warp yarn to form a sizing-agent film. The sizing agent is saved, the strength of the yarn is increased, the sizing agent can be well attached to the hairness on the surface of the yarn, and the wear resistance of the yarn is improved.

The invention discloses a method for reproduction treatment and zero discharge and recirculation utilization of industrial wastewater, which contains pretreatment, membrane separation, condensation liquid treatment and reflux, and sludge treatment. The pollution index of high concentration industrial wastewater pretreated SDI is less than or equal to 5; according to the requirement of clear-water quality, being separated by nano filter membrane or reverse osmosis membrane, the water applies for industrial production after disinfection; condensation liquid flows back and circulates, and is used for inverse/ positive washing multiple-media filtrator, the washing condensation liquid flows back and circulates after flowing into A/ O pool and generating anaerobic-aerobic reaction; sludge is dewatered to mud cake and delivered out, while the water flows back and circulates. Compared with the prior art, with the invented process, after regenerating treatment to the high concentration industrial wastewater, the produced water comes up to the requirement for clear-water used for industrial production and can be applied for production directly, which realizes the zero discharge and recirculation utilization of the industrial wastewater, and the water cost of regenerating treatment is lower than the integrated cost prior industrial water.

The invention relates to an alcohol dual manufacturing technique with tuber as the main material in the alcohol fermentation industry technique, which comprises the following steps: mixing starch and the last anaerobic fermentation digestive liquid; heating, liquefying and reducing the temperature by adding maxilase and mixing homogeneously; adding the last distillery slop; saccharifying by adding glucoamylase; reducing the temperature; inoculating the extended culture distillery yeast; culturing in the constant temperature; acquiring the product alcohol by distilling; using distillery slop as the water for the next saccharifying and adjusting acid; cooling the rest slop and inoculating the last activated sludge in order to produce methane with anaerobic fermentation; recovering the activated sludge and digestive liquid by separating anaerobic fermentation liquid; making the digestive liquid back to the proportioning procedure as the technology water; circulating sequentially. The invention only needs a step anaerobic fermentation of distillery slop, which reduces investment of accommodation area and capital assets, can circulate anaerobic fermentation digestive liquid, achieves zero discharge of the wastewater from fermentation, achieves the circulation of the water resource and reduces the cost of alcohol.

The invention relates to ultra-low density ceramsite proppant and a preparation method thereof, and the proppant and the preparation method belong to the technical field of ceramsite proppant for fracturing an oilfield; the invention aims to solve the technical problems of providing the ultra-low density ceramsite proppant which can replace deep well fracturing proppant, is low in operation cost and has low volume density, and the preparation method thereof; the adopted technical scheme is as follows: raw materials are mixed in the following parts by weight: 80 to 85 parts of bauxite, 10 to 15 parts of quartz, 1 to 5 parts of dolomite, and 1 to 2 parts of clay; and the prepared ceramsite proppant replaces the deep well fracturing proppant and is applied to shallow-well fracturing, the volume density is less than 1.5g/cm<3>, so that the operation cost of the auxiliary equipment of the oilfield is effectively reduced, the use of fracturing fluid is reduced, the cost of the proppant is reduced, unnecessary waste is reduced, utilization value of the proppant, and huge economic benefits are brought to the oilfield.

The invention discloses a pump-free jet refrigerating machine. The pump-free jet refrigerating machine comprises a generator, a first ejector, a condenser, a throttling element, an evaporator, a three-way valve, a first liquid storage tank and a first one-way valve, wherein the first ejector is successively connected with the condenser, the throttling element and the evaporator in series so as to form a loop; the three-way valve is successively connected with the first liquid storage tank, the one-way valve and the generator in series so as to form a loop, and a communicated pipeline is arranged between the generator and the first ejector; and a communicated pipeline is arranged between the condenser and the three-way valve. According to the invention, the bondage of traditional thought is broken through, the switchover of the three-way valve is utilized to realize conveyance of a fluid from a low-pressure condenser to a high-pressure generator, and a circulating pump in traditional circulation is replaced, so as to provide the pump-free jet refrigerating machine; and in addition, the pump-free jet refrigerating machine provided by the invention is utilized to improve different existing jet refrigerating machines.

The invention discloses a fuel cell cold start anode purging device and a purging method, which solve the problem of hydrogen waste in fuel cell purging in the prior art, and have the beneficial effect of ensuring stable output of fuel cell stack performance. The fuel cell cold start anode purging device comprises a nitrogen purging system and a pressure release valve. The nitrogen purging systemcomprises a nitrogen container, wherein the nitrogen container can be connected with a fuel cell stack inlet; a fuel cell stack outlet can be connected to an inlet of a three-way valve, and an outletof the three-way valve is communicated with a gas-liquid separator and a liquid storage tank; the gas-liquid separator is connected with an ejector or a circulating pump; the pressure release valve isarranged in a gas circulation system; a pressure release valve inlet can be connected with the fuel cell stack inlet; and a fuel cell stack outlet is communicated with the external environment through a liquid storage tank.

The invention discloses a hydro-electric generator set, which comprises a fixation frame; a generator is arranged on the fixation frame; a plurality of set converters are arranged under the fixation frame in sequence; a water wheel component which can rotate after being driven by natural running water is arranged at the outlet end of each set converter; a transmission mechanism is arranged between the water wheel component and the generator; an adjusting device capable of adjusting water flux entering the water wheel component is arranged at the front end of the water wheel component under the fixation frame; the purpose of the invention lies in that shortcoming of current technology can be overcome; a hydro-electric generator set is provided with simple structure, capability of utilizing energy of natural current without a need of dam railing, and low power generation cost.

The invention relates to a conditioner and the application in sludge composting thereof, relating to a conditioner and the application thereof. The invention solves the problems that the existing conditioner is large in dosing quantity, easy to be decomposed, low in mass transfer efficiency, difficult to be recycled and easy to have anaerobic acidification. The conditioner is pumice with the grain diameter of 0.2 cm to 10 cm. The conditioner has the following applications: firstly, the conditioner is mixed with sludge so as to obtain a mixing material; secondly, the mixing material is put in a fermentation apparatus to carry out fermentation; thirdly, material is discharged after fermentation, then the conditioners is sieved out, namely, the application of the conditioner in sludge composting is finished. The dosing quantity of the conditioner is decreased by 30 percent, and the space structure thereof is stable, and the conditioner is not easy to be decomposed, high in mass transfer efficiency, able to be recycled and not easy to have anaerobic acidification.

The invention relates to a synchronous deep purification technology for various pollutants in industrial flue gas. The steps include enabling pure water to be subjected to electrolyzation and ultra-violet radiation to generate hydroxyl radicals to be fully mixed with flue gas through a gas mixing device, and oxidizing SO2 and NO which are difficultly soluble in water into S03, NO2, N2O3 and N2O5 which are easily soluble in water; oxidizing high-volatility HgO which is difficultly soluble in water into Hg2+ which is easily soluble in water and easy to be attached to particulate matters; performing oxygenolysis on VOC (volatile organic compounds) and Dioxin to form water and CO2, contacting the oxidation products with water sprays in flue gas to be subjected to dissolving and condensation to form liquid drops, removing micro particles and liquid drops in air flow through a demister, and exhausting purified flue gas into the air through a chimney; and taking collected liquid produced in flue gas demisting, precipitating and filtering, and reusing solid and liquid obtained by separation. The synchronous deep purification technology for various pollutants in industrial flue gas has the advantages that hazardous substances such as SO3, SO2, NOx, Hg, VOC, Dioxin and PM 2.5 in flue gas can be removed simultaneously, collected liquid can be reused, the investment and operation costs are low, and the environmental benefits are good.

The invention discloses a refrigeration and dehumidification control method for an air conditioner. The refrigeration and dehumidification control method for the air conditioner includes the steps that in the running process that the air conditioner performs refrigeration and dehumidification, when humidity is larger than a preset temperature threshold, whether the air conditioner enters an anti-condensation mode to run or not is judged according to the variable of the indoor environment temperature and/or the variable of the coiled pipe temperature of an indoor heat exchanger, and the air conditioner is controlled to run according to the judgment result. The invention further discloses an air conditioner system. By means of the refrigeration and dehumidification control method for the air conditioner, whether the air conditioner is needed to enter the anti-condensation mode or not can be accurately judged, and therefore the running cost of the air conditioner is reduced.

Disclosed is a method for directly starting a steam-driven feed water pump of a large-sized thermal power plant. Two steam inlet sources are designed for a steam turbine of the steam-driven feed water pump, and steam is supplied in a cold-section mode or a main steam mode and four-stage steam extraction mode. The method for directly starting the steam-driven feed water pump includes adding an auxiliary steam source; supplying steam to the steam-driven feed water pump by the auxiliary steam source in a starting phase; completing a water supply process for the boiler by the aid of the steam-driven water feed pump; gradually switching a small-machine steam inlet mode from an auxiliary supply mode into the cold-section mode or the main steam mode when parameters of cold-section steam or parameters of main steam meet requirements on inlet steam of the steam turbine of the water feed pump; and realizing a starting function of the steam-driven water feed pump. An electric starting water feed pump is omitted, the auxiliary steam source of the steam turbine of the steam-driven water feed pump is added, the steam-driven water feed pump is directly started, a bypass regulating valve system is disposed on a high-pressure water feed pipeline of a boiler, and the requirement on control of water feed flow of the boiler when load of the boiler is low is met.

The invention discloses a shared equipment dynamic coded lock system. The shared equipment dynamic coded lock system comprises a shared equipment dynamic coded lock, client equipment and a server; the shared equipment dynamic coded lock comprises a coded lock assembly and a coded lock unique identification make; the coded lock assembly comprises a processor, a real-time clock, a nonvolatile storage medium, a code input keyboard, a unlocking drive circuit, a locking system and a battery; a second encryption key is obtained by the server according to an equipment number, an encryption operation is carried out according to the second encryption key and the server clock to generate a lock code; the encryption operation which is similar to the server is carried out on the processor according to the first encryption key similar to the second secret key and the clock information to generate a dynamic code; the lock code and the dynamic code are compared, and then the unlocking operation is carried out on the shared equipment dynamic coded lock by depending on requirement. The shared equipment dynamic coded lock system has the advantages of low operation cost and random code.

The present invention uses two-stage absorption apparatus to absorb toluene, butanone, and dimethyl formamide separately from the waste gas. The first stage of the absorption apparatus has dimethyl formamide as absorbent to absorb toluene and butanone, and the second stage of the absorption apparatus has water as absorbent to absorb dimethyl formamide. Toluene, butanone and dimethyl formamide are recovered via the vacuum evaporating recovering system matched with the stages. The present invention realizes the separation, recovery and reuse of toluene, butanone and dimethyl formamide without introducing new organic component. The present invention has high efficiency, low power consumption and reliable running.

The invention discloses a method for flue gas demercuration by using desulfurization waste water of a coal-fired power plant. The method comprises the following steps: adding one or two of a halogen additive and a demercuration catalyst into desulfurization waste water produced in a wet flue gas desulphurization process of limestone-gypsum in the coal-fired power plant; after fully mixing, pumping to a flue between an air pre-heater and a dedustor; atomizing and spraying in the flue through an atomizing device; fully contacting with dust in the passing flue to remove mercury in the flue gas; capturing and removing solid state matters and flue gas dust in the desulfurization waste water, thus realizing zero-emission of the desulfurization waste water while carrying out flue gas demercuration. Meanwhile, the invention further discloses a system which uses the method. According to the invention, not only can flue gas and mercury emission of the coal-fired power plant be reduced, but also zero-emission of the desulfurization waste water is realized. Fuzzy conventional wastewater treatment processes are canceled, thereby realizing the effect of treatment of wastes with processes of wastes against one another.