91results about How to "Reduce air pollution" patented technology

A hydrogen hybrid locomotive driven by a set of electric traction motors powered by at least one hydrogen fuel cell power module and plurality of batteries includes a chassis, an isolation structure disposed on the chassis for isolating the at least one hydrogen fuel cell power module from shock and vibration and a battery rack disposed on the chassis for supporting the plurality of batteries. A hydrogen containment module is disposed above the battery rack and includes a support rack supporting a plurality of hydrogen tanks and a manifold coupled to each of the plurality of hydrogen tanks for allowing charging and discharging of the hydrogen tanks.

A highway vehicle towing system includes a light railroad track embedded in a highway and capable of transmitting electricity from a power supply plant, and a towing tractor movable along the light railroad track to tow a car. The owing tractor has multiple pairs of metal wheels movably supported on the light railroad track, a motor, electrical wires connecting the metal wheels to the motor for transmitting electricity from the light railroad track to the motor, a transmission shaft coupled to and rotatable by the motor, and a differential mechanism coupled between the transmission shaft and the metal wheels for enabling the metal wheels to be rotated along the light railroad track by the motor.

The invention discloses an intelligent automatic grinding and polishing unit based on a digital bus and a usage method thereof. The intelligent automatic grinding and polishing unit comprises a grinding and polishing device (2), a control valve bank (3) and the like. A body (21) of the grinding and polishing device is at least provided with two inner channels (211) and outer channels (212) which are identical to the inner channels in number and are communicated with the inner channels respectively. The body is further provided with a pattern recognition sensor, a position sensor and a range sensor. A working device (23) is internally provided with spraying orifices (231) communicated with the inner channels. The intelligent automatic grinding and polishing unit further comprises a grinding head drive mechanism (232) and a grinding head (234). The control valve bank comprises a positive-pressure gas control solenoid valve, a negative-pressure gas control solenoid valve and a brightener control solenoid valve which are connected with the inner channels and the outer channels. The intelligent automatic grinding and polishing unit can decrease the air pollution degree of a working site, lower the probability of secondary pollution and achieve intelligent grinding and polishing, thereby being suitable for grinding and polishing procedures in digital bus factories.

The invention discloses an unfired cigarette heating device which comprises a hollow heating casing with one end opening and further comprises a circuit control carrier. A vent hole is molded in the heating casing; a piercing internal-heating structure and an annular external-heating structure are arranged in an inner cavity of the heating casing, the piercing internal-heating structure is arranged at the bottom of the heating casing, and the annular external-heating structure is arranged on the annular cavity wall of the heating casing. A cigarette clamp part is arranged at one end of the circuit control carrier, a smoking part which is in gas-flow circulation with the cigarette clamp art is arranged at the other end of the circuit control carrier, the cigarette clamp part is inserted in the inner cavity of the heating casing and is in sealed connection with the same; an airflow actuator used for starting the piercing internal-heating structure and the annular external-heating structure to heat cigarettes is also arranged in the circuit control carrier. During smoking by the smoking part of the circuit control carrier, the piercing internal-heating structure and the annular external-heating structure are started to simultaneously heat the cigarettes. The cigarettes are heated from all sides by means of combination of the piercing internal-heating structure and the annular external-heating structure; meanwhile, air pollution caused by leaked smoke can be reduced in use of the unfired cigarette heating device; and by the unfired cigarette heating device, the whole cigarettes can be heated uniformly with low requirement for heating temperature.

The invention discloses an anti-condensation control method and an anti-condensation control device for a combined air conditioner, and the combined air conditioner. The method comprises the following steps: acquiring the wet-bulb temperature of an environment where the combined air conditioner is located under a refrigeration mode of the combined air conditioner; determining whether the wet-bulb temperature is lower than or equal to a preset dew-point temperature; and adjusting the opening degrees of an air valve and/or a water valve of the combined air conditioner when the wet-bulb temperature is lower than or equal to the dew-point temperature, so as to enable the current wet-bulb temperature of the environment after the adjustment to be higher than the dew-point temperature, and realize anti-condensation control for the combined air conditioner. The scheme of the invention is capable of overcoming the defects of high energy consumption, small application range, high possibility of environment pollution, and the like in the prior art, and realizing the beneficial effects of low energy consumption, large application range and low possibility of environment pollution.

The invention discloses a waste gas recovery disposal method of dry synthetic leather DMF, which comprises the following steps: sending the DMF waste gas in the feeding tower with at least one grade of counter current absorption structure and one grade of fog-receiving structure through variable-frequency energy-saving fan; draining the qualified waste gas from one side of feeding tower and DMF solution from the other side. The feeding tower is composed of two-grade water counter current absorption structure and two-grade fog-receiving structure. The DMF waste gas is absorbed by one-grade spray and sent to two-grade water counter current absorption after cooling, which is drained when the gas reaches the standard. The invention displays simple technological flow path, convenient usage and stable operation, which can realize complete-automatic artificial intelligent control to improve the economical benefit.

The invention discloses a method for recovering chloromethane from chloromethane-containing waste gas in the maltol production and relates to the method for recovering chloromethane, and the method can be used for obtaining finished high-purity chloromethane and is simpler in process route and easy to realize. The method comprises the steps as follows: allowing the waste gas generated in the process of recovering a methanol solvent after chlorination reaction to pass through a hydrolysis kettle, and introducing the waste gas into an alkaline washing tower through a pipeline for alkaline washing; collecting the waste gas subjected to primary alkaline washing by a buffer tank; introducing the waste gas in the buffer tank into a water washing tower for water washing through a roots machine, and removing water-soluble substances; carrying out two-stage acid washing on the waste gas subjected to water washing; carrying out two-stage alkaline washing on the waste gas subjected to two-stage acid washing; and drying the waste gas subjected to two-stage alkaline washing, compressing by a compressor, cooling into a liquid phase by a condenser, and feeding into a finished product storage tank.

The invention relates to a setting method for organic fertilizer production workshops and a production method for organic fertilizer through the workshops. The setting method comprises the steps of the setting of a raw material pretreatment workshop, the setting of a fermentation workshop, the setting of a decomposing workshop, the setting of a production and packaging and the like, so that reasonable production workshops are set, and the production workshops have the advantages that the operation is convenient, the processing cost is low, poultry excrement can be processed on a large scale, and secondary pollution can be prevented. The production method comprises the steps of raw material pretreatment, fermentation, stacking, impurity removal, packaging and the like to produce the organic fertilizer and to improve the utilization rate of poultry excrement, and the organic fertilizer produced is convenient to store and transport.

A hybrid lead acid electric storage battery uses conventional lead-acid secondary battery chemistry. The battery is a sealed battery or an unsealed battery. The battery has a set of positive battery grids (plates) having cores of thin titanium expanded metal with a thickness, if flattened, preferably in the range 0.2 mm to 0.7 mm and most preferably 0.3 mm to 0.4 mm. The grid cores are of a titanium alloy containing a platinum group metal. The cores are coated with hot dip lead and are not lead electroplated.

The negative plates are carbon based assemblies. Each such assembly has a metal core, preferably a sheet of expanded copper, a corrosion shield sealing the metal core, and an outer layer primarily of activated carbon covering the shield.

The invention discloses a uniform paint spraying device for a chassis of a new energy automobile. The uniform paint spraying device comprises a supporting table. A processing box is fixedly connectedto the top of the supporting table. A feeding tank is fixedly connected to the top of the processing box. A feeding opening is formed in the left side of the top of the feeding tank. A driving motor is movably connected to the inner cavity of the supporting table. An output end of the driving motor is movably connected with a rotating rod. The top of the rotating rod penetrates through the supporting table and the processing box and extends into the inner cavity of the processing box. Through the cooperation of the supporting table, the processing box, the feeding tank, the feeding opening, the driving motor, the rotating rod, a processing disk, a first guide pipe, a first transfer pump, a second guide pipe, a third guide pipe, a fourth guide pipe, a second transfer pump, a fifth guide pipe, oil paint spray nozzles, a control panel and a single chip microcomputer, the problems that the chassis of a traditional new energy automobile is manually sprayed with paint, the operation processis complicated and cumbersome, and paint is sprayed non-uniformly, so that the working efficiency of workers is reduced are solved.

Field mobile biomass granulator, energy saving and environmental protection equipment field, field mobile biomass granulator includes "said" shaped square frame, the upper, middle and lower beams are all flat. The three-axis reducer is installed on the bottom frame, the ring die granulation device is installed on the middle beam, and the 'Yue' frame is installed in the middle section of the tractor trailer. The front end of the traction beam is connected with the tractor traction plate with a plug hinge. The rear power output shaft of the tractor is connected with the medium speed reducer by the transmission shaft, and the power of the low speed shaft of the reducer is driven by the chain to the granulator. It can improve the water adaptation range of the pellet machine, and enable the pellet machine to granulate all straw and forest waste in the field. , Add finished product warehouse and water tank, you can work, and you can complete the two processes of grain harvesting and grass harvesting at one time.

The invention discloses a novel grinding machine and relates to the technical field of a grinding apparatus. The novel grinding machine comprises a grinding mechanism, a clamping mechanism and a rotating mechanism, wherein the grinding mechanism consists of a grinding head, a grinding head motor and a grinding head driving device; the grinding head driving device can enable the grinding head to move up and down and left and right; the rotating mechanism comprises a rotating motor and an extension shaft fixed on an output shaft of the rotating motor; the rotating motor is fixed on a rotating mechanism fixed seat; the clamping mechanism comprises a clamping cylinder and two clamping bases; one clamping base is arranged below the extension shaft and the other clamping base is arranged on a cylinder rod of the clamping cylinder. The novel grinding machine has the beneficial effects that due to adoption of a grinding mode, no matter what shape a product is of, the grinding head can be attached to the surface of the product to move; the products with any shapes can be ground; the novel grinding machine has a very wide application range.

A regional symmetric and interlocked traffic light control method includes: defining a first preferred point in a desired metropolitan area; determining a first axial average vehicle speed and a first axial preferred allowed travel time period for the first axial streets and a second axial average vehicle speed and a second axial preferred allowed travel time period for the second axial streets; obtaining a first vehicle travel distance and a second vehicle travel distance; determining a first control region according to the first preferred point, the first vehicle travel distance and the second vehicle travel distance; defining a second preferred point and a third preferred point adjacent to the first control region; controlling a plurality of traffic lights in the two adjacent control regions to respectively display green and red lights on the same axial streets in accordance with a preferred allowed travel time period and linking the traffic lights in said control regions by serializing. Therefore, a vehicle can pass through a plurality of adjacent control regions in accordance in its cruising speed and the traveling efficiency of the vehicle can be improved.

A hot mix asphalt (HMA) or warm mix asphalt (WMA) plant features material transfer by shear action of segmented screws and directional flights standing on an inner drum. Indirect convective material heating is initiated by a heating source located inside of the inner drum. Material mixing, heating, melting, and uniform coating, all take place as a single simultaneous process. As the result of processing, regular HMA (or WMA) or up to 100% RAP (or ARS) recycled HMA (or WMA) can be produced. Many heat sources, such as a conventional oil burner and the surface combustion burner, may also be utilized in the plant. The plant may be combined with paving units for an integrated, mobile paving system.

The invention discloses an energy-saving and environment-friendly horizontal leaf suction machine, which comprises a storage battery, an electric box, a solar power generation panel, a vehicle body, a vehicle door, a handle, a leaf storage tank, a blowing pipe, a rotating filter barrel, a suction leaf opening, a blower, a poly Wind swash plate, hand push rod, push rod retractable button, inverter and power display, the upper end of the car body is provided with a solar power generation panel, the lower end of the solar power generation board is provided with an electric box, and the electric box is provided with a storage battery, and the right side of the car body There is a door on the side, and a handle is arranged on the door. There is a leaf storage tank on the left side of the door. A rotating filter barrel is arranged on the left side of the leaf storage tank. There is a blower on the left side. The invention provides electric energy for the device through the solar power generation panel, thereby achieving the purpose of energy saving, and the device uses the blower to generate high-speed airflow, and then generates suction at the suction leaf opening, and then absorbs the leaves. This collection method Compared with fuel oil equipment, it greatly reduces the noise pollution and air pollution caused by the device.

The invention relates to a method of manufacturing bio-diesel by bio-catalysis grease and inter-esterification. The method of manufacturing bio-diesel by the waste grease biological method is that: pre-processed raw material grease is firstly added into a first stage fixed enzyme reactor, and methyl alcohol is also added into the enzyme reactor, the crude glycerin is separated from the post-reaction effluents and other reactants flow through enzyme reactors of different stages respectively. The operation is repeated. When the reaction finishes, all the reaction end products are separated, and the finished bio-diesel is obtained. 3-4 stages of fixed enzyme reactors are adopted for the continuous inter-esterification process, and the temperature of 25-50 DEG C is required for the whole reaction process. The raw material of the invention is cheap grease, and the waste materials are utilized and the production cost for bio-diesel is decreased.

The invention discloses slow-release compound fertilizer. The slow-release compound fertilizer comprises the following raw materials in parts by weight: 10-20 parts of waste glass, 15-25 parts of plant straw, 15-30 parts of animal waste, 10-20 parts of edible mushroom residue, 8-13 parts of urea, 4-6 parts of phosphorus pentoxide, 6-8 parts of potassium oxide, 10-15 parts of humic acid, 8-17 parts of lignin, 5-10 parts of bone meal, 0-0.5 part of starch or derivatives thereof, 0.4-0.7 part of cellulose or derivatives thereof and 6-12 parts of granulating adhesives. The slow-release compound fertilizer can be applied to all soil types and crops, is capable of improving the soil structure, improving water retention capacity and fertilizer retention capacity of the soil and preventing and treating soil hardening, and especially has a good effect on improving saline-alkali soil.

A method and apparatus for reducing air pollutants associated with dry process, precalciner cement manufacturing is shown. Raw feed meal used in cement production is heated in a special heating chamber to drive off volatile compounds, such as organic materials and salts of ammonia. Preferably, the feed meal is heated to a temperature of at least 350° F. The gases that are driven off flow to the precalciner where they are combusted and rendered harmless. Heat is provided by diverting at least a portion of the exhaust gases from the cement pyroprocessing kiln to the special heater. The raw feed meal is indirectly heated using a heat exchange wall between the feed meal and the kiln exhaust gas flow. In addition, abase-containing material such as lime or precalcined feed meal, may be added to the raw feed before treatment meal to promote the breakdown of inorganic ammonium compounds, thereby releasing gaseous ammonia which is also destroyed upon subsequent combustion. Hot precalcined meal may also be used to provide some of the heat required to heat the raw feed meal in the special heating chamber.

An intercity aerial rail transit stereo network system comprises transverse rail lines and longitudinal rail lines and is characterized in that the transverse rail lines and the longitudinal rail lines are staggered to form a stereo network, and stations are arranged at the staggered positions. A single transverse rail line and a single longitudinal rail line respectively consist of stations, columns, rails, rail cars, a power supply system, a control system and the like. The rails are erected in the air between every two adjacent stations by means of the columns, are wavy curve rails and are continuous rails seamless in the middles, the columns and the rails are connected in a fixing and/or sliding mode, and the rail cars run along the rails by relying on the power supply system and the control system. The intercity aerial rail transit stereo network system can be built in a low-cost, short-time and batched mode, the outgoing efficiency of residents can be greatly improved, the outgoing cost can be greatly reduced, and the problems of urban traffic jam and environmental pollution are solved.

The invention belongs to the field of mechanical equipment, and particularly relates to environment-friendly bed board machining equipment. The environment-friendly bed board machining equipment is characterized in that one end of a fixed frame is connected with a first rotating shaft, and the other end of the fixed frame is connected with a second rotating shaft, wherein the tail end of the first rotating shaft is arranged in a rotating shaft bearing; the tail end of the second rotating shaft is arranged in a second rotating shaft bearing; a worm gear is arranged on the first rotating shaft; one end of a worm is meshed with the worm gear, and the other end of the worm is in transmission connection with an output shaft of a motor through a conveyor belt; paint spraying gun cylinders are arranged on a sliding guide rail, and are connected with paint spraying guns; the paint spraying guns are positioned above the fixed frame; an air outlet of an air outlet fan is connected with a condenser through an air outlet pipeline; the condenser and a collection tank are connected through a recovery pipeline; an upper double acting door sliding way is arranged on the upper part of a rack; a lower double acting door sliding way is arranged on a base.

The invention relates to a calling system of a taxi, which consists of a taxi communication terminal (1) with a GPS positioning instrument, an information transceiver (2), a positioning system (4), a computer (5) and a GPS communication device (6). When a client telephones the information transceiver, the transceiver utilizes the positioning system to position the telephone of the client; and the computer searches a nearest idle load taxi close to the client, sends the azimuth information and telephone number of the client to the taxi communication terminal, and sends the license plate number of the taxi and the telephone number of a driver to the client. Therefore, the calling system of the taxi achieves information intercommunication between the taxi driver and the client, is convenient for the client, improves the working efficiency of the taxi, reduces the idle driving ratio of the taxi, and reduces energy consumption.

The invention relates to a method for clean production of bioorganic fertilizer by using attapulgite. The bioorganic fertilizer comprises, by mass, 10-20 parts of attapulgite, 40-60 parts of cow dung, 15-30 parts of chicken manure, 10-20 parts of crop straws, 5-10 parts of plant ash, and 0.05-0.5 parts of a bioactive inoculant. The production method of the bioorganic fertilizer comprises the following steps: uniformly mixing the bioactive inoculant with a small amount of attapulgite, chicken manure and cow dung, carrying out spreading cultivation on the above obtained mixture, stacking the spreading cultivated material and remaining raw materials, controlling the water content and the carbon-to-nitrogen ratio, and carrying out high temperature aerobic fermentation to obtain the bioorganic fertilizer. The method has the advantages of simple process, obvious reduction of discharge of stink in the composting process, increase of the activity and the quantity of microbes, promotion of the fermentation process, increase of the decomposition degree of compost, and improvement of the soil structure, so the yield increase and the quality improvement of agricultural products are promoted, and the economy income of peasants is increased.

The invention discloses a gas calibration device of an infrared gas detector. The device comprises a calibration cylinder body. A gas inlet, a gas outlet, a front calibration window and a back calibration window are all arranged on the calibration cylinder body. The device also includes a gas inlet rotating plug and a gas outlet rotating plug. The front calibration window and the back calibration window are respectively fixedly disposed on the two ends of the calibration cylinder body. The gas inlet and the gas outlet are disposed on the calibration cylinder body. When the calibration cylinder body is fully filled with a calibrated gas, the calibration cylinder body is sealed by the rotating plugs. When calibration is carried out through the infrared gas detector, the calibration cylinder body is fixed in a detection light path of the infrared gas detector when gas needs to be fed for simulating a feeding process of the calibrated gas to complete gas calibration. The gas calibration device can solve a problem that the gas is continuously fed into a calibration light path during the gas calibration with the infrared gas detector and the gas is diffused into air. The gas calibration device allows air pollution to be reduced and meanwhile can be used repeatedly so that cost of the gas calibration is effectively saved.

The invention discloses a low-concentration high-air-volume organic waste gas treatment system and a treatment process thereof, and belongs to the technical field of organic waste gas treatment. The treatment system comprises a fan, a pretreatment system, a concentrating rotary wheel, a heater, a cooler, a membrane separator, a vacuum pump, a condenser and a product tank; and a rotary wheel adsorption concentrating technique, a membrane separation technique and a condensation technique is combined into an integrated process, and low-concentration organic waste gases exhausted during the production of industries such as coating, printing, automobile spray-coating and furniture making are subjected to recovering treatment, so that air pollution is reduced, the energy utilization ratio is increased, and the enterprise cost is reduced.

The invention discloses a pumpkin greenhouse planting method and belongs to the technical field of agricultural planting. The method specifically includes the following steps that firstly, a greenhouse and a planting frame are erected; secondly, waste materials are laid on the ground in the greenhouse, and biogas slurry is splashed, so that the waste materials are fermented; thirdly, earthworms are bred on the fermented ground; fourthly, pumpkin seedlings are planted; fifthly, breeding management is carried out; sixthly, the earthworms are harvested, and earthworms are repeatedly bred. According to the method, pumpkins are planted and the earthworms are bred on same soil mass, so that land resources are fully used. Meanwhile, the waste materials are used for breeding the earthworms so that organic matter can be decomposed, soil fertility is improved, soil has air permeability and water permeability, and growth of green plants is facilitated. Carbon dioxide and heat generated by activities of the earthworms and fermentation of materials can promote growth of the pumpkins, ripening time of the pumpkins is shortened, the pumpkins appear on the market ahead of time, and the dual effects of increasing the yield and increasing income are achieved.

A process for preparing the desulfurizing agent of boiler fume from salty mud which contains calcium oxide, silicon oxide, magnesium oxide, sodium chloride and water includes such steps as adding calcium line to said salty mud, stirring, drying, proportionally mixing with hexamethylene tetraamine and sodium tetraborate, stirring and pulverizing. It can be mixed with coal to reduce sulfur by 55-66%.

The invention discloses a three-layer gas supply heating self-conversion tar gasifier. The gasifier is composed of a double bell coal feeder, a gasifier body, a three-layer of gas supply heating gasifier distributor, an ash residue discharging structure and a gas supply system; the three-layer of gas supply heating gasifier distributor is provided with a coal gas delivery line in the center in themiddle of the interlayer gasifier body, and the coal inlet at the bottom of the three-layer of gas supply heating gasifier distributor is arranged between a second gas supply heating gasifier distributor and a third gas supply heating gasifier distributor; a first gas supply heating gasifier distributor is located at the upper part of the gasifier body; the second gas supply heating gasifier distributor is located on the inner side of the middle gasifier wall and the outer side of the coal gas delivery line; and the third gas supply heating gasifier distributor is located in the center at thebottom of the gasifier body. Through the structural improvement of the gasifier, a high-temperature region can be formed, so that tar can be cracked and gasified in the high-temperature region, the performance of the gasifier can be greatly enhanced, efficient cleaning conversion of coal can be realized, and powerful support can be provided for development of coal gasification technologies.

The invention discloses a method for screening bacillus megatherium for desulfurizing of a petroleum product. The method comprises the following steps of 1, putting oil-containing soil into a triangular flask, uniformly shaking, and stilling until completely settling; 2, inoculating a supernatant into the triangular flask containing basic culture liquid, and performing enrichment culture; 3, inoculating enrichment culture liquid into the triangular flask containing the basic culture liquid, oscillating and culturing; 4, diluting diluting liquid in doubles, coating the culture liquid onto a solid flat plate containing a basic culture medium, putting the flat plate into a culture box, and culturing until a bacteria colony is grown; 5, scoring and purifying the single bacteria colony, and performing low-temperature ammonia and nitrogen degrading test, so as to obtain a desulfurizing strain of the petroleum product. The screened bacillus megatherium for desulfurizing of the petroleum product is used for widely degrading DBT (dibenzothiophene) in thepetroleum product, so that the significant meaning is realized for the decreasing of air pollution and acid rain and the restoration of ecological environment.

The invention provides a machine manufacturing process for a color masterbatch drying and impurity removal device, including a dryer, a temperature and humidity sensor, a control cabinet, a dust processing device, a stirring device, a feeding pipe, a drying and dust removal tank, a filter screen, a control valve, and sample taking Door, fine sieve separation device, sleeve, locking bolt, sleeve rod, shock absorbing pad and discharge pipe, and the dryer is bolted to the left and right sides of the lower part of the drying dust removal tank respectively. The setting of the fine sieve separation device of the present invention is beneficial to solve the problem of poor screening effect of the existing color masterbatch drying and impurity removal device, thereby speeding up the production efficiency, and the setting of the control cabinet is beneficial to solve the intelligence degree of the existing color masterbatch drying and impurity removal device Low, the setting of the dryer is conducive to quickly drying the masterbatch, improving efficiency, enabling the operator to quickly carry out the next step, more convenient to use, and easy to promote and use.

The present invention relates to a coal-fired boiler flue gas-catalytic regeneration flue gas combined discharging system, which comprises a catalytic regeneration flue gas unit, a coal-fired boiler flue gas unit and a flue gas desulfurization device, wherein the flue gas desulfurization device is provided with a chimney, the catalytic regeneration flue gas unit comprises a catalytic flue gas waste heat boiler, a catalytic flue gas dust collector and a catalytic economizer, the catalytic flue gas waste heat boiler is connected to the catalytic economizer through the catalytic flue gas dust collector, the coal-fired boiler flue gas unit comprises a steam boiler, a steam superheater, a high temperature economizer, a No.1 high temperature pre-heater, a No.2 high temperature pre-heater, a boiler flue gas low temperature economizer, a No.1 low temperature pre-heater, a denitrification device, No.2 low temperature pre-heater boiler, a boiler flue gas dust collector and an induced fan, the steam boiler, the steam superheater, the high temperature economizer, the No.1 high temperature pre-heater, the No.2 high temperature pre-heater, the boiler flue gas low temperature economizer, the No.1 low temperature pre-heater, the denitrification device, the No.2 low temperature pre-heater boiler, the boiler flue gas dust collector and the induced fan are sequentially connected, and the outlets of the catalytic economizer and the induced fan are connected to the flue gas desulfurization device. According to the present invention, the flue gas emission meets the emission standard so as to reduce the air pollution, protect the natural environment, beneficially optimize the resource allocation, reduce the production apparatus occupation area, and reduce the production cost of the enterprise.