87results about How to "Improve denitrification efficiency" patented technology

The invention belongs to the field of wastewater treatment. The invention provides a manganese-carbon composite controlled-release material as well as a preparation method and application thereof. The manganese-carbon composite controlled-release material comprises the following components: a manganese-rich mineral, a natural plant carbon source, a cementing material, aggregate, an additive and a foaming agent. The manganese-carbon composite controlled-release material disclosed by the invention can regulate and control the carbon release and manganese circulation process by virtue of the interaction between manganese and carbon, so that the electron transfer and mass transfer efficiency is remarkably improved, synergistic denitrification is realized, the overall denitrification efficiency is remarkably improved, and synchronous nitrogen and phosphorus removal and self-adaptive continuous denitrification are realized. The raw materials required for preparing the manganese-carbon composite controlled-release material are environment-friendly and low in price, the preparation process is simple, the preparation cost is low, and the manganese-carbon composite controlled-release material can be applied to filler in a submerged area of an artificial wetland, a biological filter and a biological retention system, and can be widely applied to application scenes such as tail water advanced treatment of a sewage treatment plant, rural agricultural sewage treatment and initial rainwater purification.

The invention discloses a preparation method and application of a composite nitrogen, phosphorus and sulfur removal autotrophic filter material, and relates to the technical field of sulfur autotrophic filter materials, and the preparation method comprises the following steps: stacking and combining a basic filter material, a catalyst loaded filter material, a strain-heterojunction loaded filter material and a magnesium oxide microsphere filter material from top to bottom, the composite nitrogen, phosphorus and sulfur removal autotrophic filter material is obtained; in the stacking combination process of the composite nitrogen, phosphorus and sulfur removal autotrophic filter material, the stacking thickness ratio of the basic filter material to the catalyst loaded filter material to the strain-heterojunction loaded filter material to the magnesium oxide microsphere filter material is 10: (3-5): (2-4): (4-5). The efficient and low-cost composite nitrogen, phosphorus and sulfur removal autotrophic filter material is developed according to the synergistic treatment requirements of nitrogen and phosphorus pollution and PNP pollution.

The present invention relates to a furnace outlet NOx prediction system based on numerical simulation, including a prediction model establishment part and a real-time prediction part; and also relates to a prediction method, including: processing DCS data, obtaining boundary conditions required for numerical simulation calculation, establishing a three-dimensional geometric model of the furnace, calculating the furnace outlet NOx concentration data under different working conditions, and determining a database; according to the database, using the support vector method to establish a furnace outlet NOx prediction model; finally, according to the real-time furnace inlet parameters under actual working conditions, the furnace outlet NOx concentration is predicted in real time. The method of the present invention can predict the change of NOx at the furnace outlet and the NOx distribution in the furnace when the combustion working conditions change, that is, when the operating parameters such as wind / powder are adjusted, and provide advance guidance for SCR ammonia injection, which is of great significance to improving the denitration efficiency of coal-fired power plants, the safety of air preheater operation, and improving the economy.

The invention provides a synergistic accelerant suitable for SNCR (selective non-catalytic reduction) denitration and application of the synergistic accelerant. The synergistic accelerant comprises the following components in parts by weight: 2-80 parts of an activating agent, the activating agent is selected from at least one of sodium glycinate, sodium glutamate, sodium iminodiacetate, sodium aspartate, sodium aminopropionate, sodium aspartate and potassium aspartate; 3-12 parts of a catalyst, wherein the catalyst is selected from soluble heteropolyacid; 1-10 parts of a catalytic promoter; the catalytic promoter is selected from at least one of soluble tungstate and molybdate. A trace amount of synergistic accelerant is added into a common SNCR denitration solution, so that the reaction speed of NOx and reducing agents such as ammonia or urea can be increased, a temperature window of SNCR reaction moves downwards, the application range of the traditional SNCR technology is expanded, the removal efficiency of NOx is improved, and a low-cost and high-efficiency method is provided for pollution abatement of nitric oxide in waste gas.

The invention relates to the technical field of flue gas denitration, in particular to an ammonia water injection quantity accurate regulation and control method for a flue gas denitration system. Comprising the following steps: S1, constructing a function relational expression between the ammonia water injection amount and the denitration efficiency; s2, constructing a comprehensive objective function based on the ammonia water injection amount and the denitration efficiency; s3, collecting historical operation data of the flue gas denitration system, constructing a reinforcement learning model, and iteratively training the reinforcement learning model by using the historical operation data to minimize the comprehensive objective function; s4, acquiring the real-time operation state data of the current flue gas denitration system, and predicting the ammonia water injection amount by using the reinforcement learning model output model; and S5, constructing a correction relational expression, and obtaining the optimal ammonia water injection amount based on the correction relational expression. By constructing the reinforcement learning model and the correction relational expression and combining the real-time working condition data and the historical operation data, the system can dynamically adjust the ammonia water injection amount, the denitration efficiency is ensured to be maximized, and meanwhile ammonia escape is effectively controlled.

The utility model discloses a waste incineration boiler SNCR (selective non-catalytic reduction) denitration spraying system which comprises a first spray gun, a second spray gun and a K-type thermocouple, and the first spray gun and the second spray gun are connected to a urea solution supply system and a compressed air supply system through pipelines; the multiple first spray guns are arranged on the upper portions of the two side walls of a second channel of the incineration boiler respectively, the multiple second spray guns are arranged on the upper portion of the rear wall of the second channel, and the multiple first spray guns and the multiple second spray guns are located on the same horizontal plane so as to form a spraying curtain wall covering the cross section of the second channel; the multiple K-type thermocouples are arranged on the upper portion of the rear wall and the upper portions of the two side walls correspondingly and used for monitoring the temperature nearby the first spray gun and the temperature nearby the second spray gun in real time. The device has the characteristics of convenience in operation, high denitration efficiency, convenience in reducing urea consumption and the like, and solves the problem that as the temperature of the first channel of the hearth often exceeds the optimal denitration reaction temperature, the denitration requirement cannot be met by purely arranging the spray gun in the first channel.

The utility model relates to a dust removal and denitration integrated device for a cement kiln. The dust removal and denitration integrated device comprises an integrated bin, and a rectifying device, a dust removal area and a denitration area which are arranged in the integrated bin, the integrated bin extends in the vertical direction and is sequentially provided with a flue gas outlet, a flue gas inlet and an ash discharging opening from top to bottom, and the rectifying device is close to the flue gas inlet. The dust removal area is arranged above the dust discharge port and provided with a dust collection electrode and a corona electrode, the dust collection electrode comprises an anode frame and an anode plate, and the anode plate is in a long-strip-shaped plate shape and can shake under the action of airflow to conduct self-dust removal. The corona electrode comprises a cathode frame and a cathode wire. The denitration area is arranged above the dust removal area, the denitration area is provided with a plurality of catalyst layers and an ash removal device, the catalyst layers are arranged up and down at intervals, and the ash removal device is used for removing ash on the bottom surface of a denitration catalyst. The dust removal and denitration functions of flue gas are integrated in the integrated bin, the needed occupied area is small, the dust removal area and the denitration area do not need to be connected through an elbow, the internal flow field is smoother, and the system operation resistance is smaller.

The invention relates to the technical field of flue denitration, in particular to a urea spray gun system and a control method thereof. Comprising a central control unit used for setting a plurality of equipment points and a plurality of monitoring points according to flue parameters; the spray gun unit is used for spraying urea to flue gas in the flue; the atomization unit is used for generating atomization air; the monitoring unit is used for collecting flue gas parameters in the flue; the central control unit is further used for setting working parameters of the spray gun unit and the atomization unit according to the flue gas parameters collected by the monitoring unit. By additionally arranging the spraying unit, when the urea spray gun works, atomized air is generated to cover the periphery of the urea spray gun, the urea spray gun is prevented from being abraded by flue gas, meanwhile, solid particles in the flue gas are prevented from entering the urea spray gun to cause blockage, the atomized air is at normal temperature and can effectively cool the spray gun, and therefore the spray gun is prevented from being damaged by high temperature; and meanwhile, the sprayed urea can be further atomized by the atomizing air, so that the overall denitration efficiency in the flue is improved.

The invention discloses an efficient SCR (Selective Catalytic Reduction) denitration device of a gas turbine unit and a denitration method. The device comprises a flow velocity measuring device, an ammonia water spraying device, a flue gas rectifying device and a catalyst layer, the flow velocity measuring device and the ammonia water spraying device are sequentially arranged at the upstream of the flue gas pipeline, probes of the flow velocity measuring device and nozzles of the ammonia water spraying device are uniformly distributed on different cross sections in the flue gas pipeline, and the probes and the nozzles are matched in number and position; the flue gas rectifying device is arranged in the middle and downstream of the flue gas pipeline and in front of the multi-stage heat exchanger, and the spiral flow of flue gas is converted into linear uniform flow along the flue gas channel; the catalyst layer is arranged in the flue gas pipeline and located between the multiple stages of heat exchangers. According to the characteristic that flue gas discharged by the gas turbine spirally flows, the ammonia water injection amount is adjusted through multi-point flow velocity measurement, spiral flowing is converted into linear flowing through the flue gas rectifying device, the uniformity degree of mixed gas is improved, full catalysis is achieved, and then efficient denitration is achieved.

This invention discloses a flue gas denitrification device and method for thermal power plants. The flue gas denitrification device includes: a primary cyclone separator, a secondary electrostatic precipitator, a denitrification tower, a steam heating assembly, and a control module. The secondary electrostatic precipitator is located downstream of the primary cyclone separator in the flue gas flow direction. The denitrification tower is connected to the secondary electrostatic precipitator via a conveying pipe. One end of the conveying pipe is connected to the outlet of the secondary electrostatic precipitator, and the other end is connected to the inlet of the denitrification tower. A temperature sensor is installed on the conveying pipe. The steam heating assembly is used to introduce steam into the conveying pipe. According to this invention, the flue gas denitrification device for thermal power plants effectively removes large and fine dust particles, eliminates the risk of dust clogging and poisoning of the denitrification catalyst, improves the uniformity and efficiency of the denitrification reaction, and avoids dust clogging of the atomizing nozzles, thereby improving denitrification efficiency.

The invention discloses an anaerobic denitrifying bacterial agent as well as a preparation method and application thereof, and belongs to the technical field of water environment treatment. The anaerobic denitrifying bacterium agent is prepared from the following components in parts by weight: 15 to 30 parts of sterile water, 15 to 60 parts of normal saline, 5 to 10 parts of micro-capsule embedded anaerobic denitrifying bacteria, 5 to 20 parts of a porous composite modified carrier, 10 to 30 parts of a carbon source, 4 to 7 parts of nutrient elements, 2.5 to 4 parts of a buffering agent and 1 to 5 parts of a stabilizer, the micro-capsule embedded anaerobic denitrifying bacteria are obtained by embedding anaerobic denitrifying bacteria with an alginic acid gel solution and a calcium chloride solution; the porous composite modified carrier is obtained by crosslinking modified nano iron oxide, modified nano titanium dioxide, a functional polymer solution and glutaraldehyde. The anaerobic denitrifying bacterial agent provided by the invention can effectively improve the efficiency of treating nitrogen pollution of a water body.

The invention provides a method for reducing carbon footprints in a cremation process, which comprises the following steps: according to an internal structure and temperature distribution characteristics of an incinerator, obtaining turbulence intensity, turbulence scale and turbulence parameters, simulating an internal flow field and a temperature field of the incinerator, and obtaining internal three-dimensional temperature distribution data of the incinerator; according to the three-dimensional temperature distribution data in the incinerator, a temperature threshold method is adopted for carrying out regional division on a temperature field, and the space ranges and the volume ratios of a high-temperature region, a medium-temperature region and a low-temperature region are obtained; acquiring activation energy and frequency factors of chemical reaction in the incinerator, judging ammonia decomposition rates at different temperatures, fitting to generate a relation curve of the temperatures and the ammonia decomposition rates, and determining an optimal ammonia concentration threshold value of each temperature region; and according to real-time operation monitoring data of the incinerator, the denitration efficiency is predicted through the correlation model, if a predicted value is lower than a set threshold value, dynamic optimization of an ammonia gas injection scheme is triggered, and the dynamic optimization comprises adjustment of the injection position and the injection amount.

The application discloses a kind of suitable for SCR denitration ammonia injection device and device, including ammonia injection pipe and the ammonia injection port of setting at ammonia injection pipe end, ammonia injection pipe includes ammonia main pipeline, branch pipeline and branch pipeline;Along ammonia main pipeline circumferential direction, equidistantly there are several branch pipelines;In branch pipeline, equidistantly and parallelly there are several vertical branch pipeline branch pipelines;Several branch pipelines are in the same plane, plane vertical branch pipeline;In branch pipeline, there is vertical plane ammonia injection port;Ammonia injection port gas outlet direction is same with ammonia main pipeline inner gas flow direction.The ammonia injection device suitable for SCR denitration designed in the application, including branch pipeline and branch pipeline, ammonia injection pipeline because each part branch pipe length is small, and the difference of branch pipeline diameter is not big, so it can reduce the flow resistance of ammonia in pipeline.

The present invention provides a gas furnace ammonia-free low-temperature denitrification device and method. The hot air after flue gas heat exchange is divided into two paths, one is sent to the gas furnace set up once, and the other is sent to the flue gas conditioning smoke box pipeline system; the present invention organically combines the pretreatment of flue gas, the conditioning of flue gas, the catalytic oxidation of nitrogen oxides in the flue gas, and the reaction and absorption of nitrogen oxides in the flue gas, and realizes the implementation steps of distributed dust removal and desulfurization pretreatment of flue gas, catalytic oxidation of nitrogen oxides, and denitrification, and has high denitrification efficiency under low temperature conditions. Since the present invention does not involve ammonia, and pre-treats dust and sulfur oxides in flue gas, it can be applied to the desulfurization and denitrification treatment of flue gas with high sulfur content and nitrogen oxide content in areas such as small gas furnaces in the petrochemical industry, and has a wide range of applications.

The present invention discloses a double delta wing static mixer, comprising at least one group of static mixing devices, the static mixing device comprising at least one double delta wing mixing unit, the double delta wing mixing unit comprising two horizontally arranged mixing monomers and two vertically arranged mixing monomers, the two horizontally arranged mixing monomers are symmetrically arranged with a first diagonal line, the two vertically arranged mixing monomers are symmetrically arranged with a second diagonal line, and the tips of the two horizontally arranged mixing monomers and the two vertically arranged mixing monomers are all intersected at one point. A method for mixing gas is also disclosed. The double delta wing static mixer of the present invention has a simple structure, is easy to arrange, has a good gas mixing effect, has a small resistance, has a small impact on the original flow field in the flue, and is suitable for project transformation.

The utility model belongs to the field of flue gas denitration, especially is involved in a kind of denitration system for adding pure ammonia gas to high nitrogen oxide concentration flue gas. In order to realize emission reduction, the utility model provides a kind of denitration system for adding pure ammonia gas to high nitrogen oxide concentration flue gas, the denitration system includes flue, denitration reactor, flue gas on-line monitor, pure ammonia gas adding system for adding pure ammonia gas to flue and automatic control system;Pure ammonia gas adding system includes the ammonia supply line for conveying pure ammonia gas, flow regulating valve and ammonia gas flowmeter are equipped on ammonia supply line, the downstream end of ammonia supply line is equipped with pure ammonia nozzle located in flue and located in the downstream of flue gas on-line monitor;Automatic control system is used to control the opening of flow regulating valve according to the flow and nitrogen oxide concentration of original flue gas. Directly add pure ammonia gas to original flue gas, and dilute pure ammonia gas using original flue gas, thereby saving the energy consumed by dilution fan and reducing the amount of flue gas finally discharged.

This utility model relates to the field of wastewater treatment technology and discloses a denitrification deep bed filter, including a filter structure. A diversion component and a water storage tank are installed at the top of the tank's interior. An inlet pipe is installed on the outer surface of the tank and on one side of the water storage tank. A drive component is installed on the outer surface of the tank and at the lower end of the inlet pipe. The cleaning component includes a rotating shaft and an external rod installed on the outer surface of the rotating shaft. The outer surface of the external rod is equipped with a carbon fiber brush. When cleaning the filter media, a motor operates, and the rotating shaft installed at one end of the connecting shaft also rotates, driving the external rod to rotate. This facilitates the rotation of the external rod within the filter media, expanding the cleaning range of the filter media. The carbon fiber brush contacts the filter media, and the rotating carbon fiber brush facilitates cleaning of the filter media, preventing impurities from adhering to the surface of the filter media and affecting the water treatment effect.

This utility model relates to an ammonia fuel regenerative combustion device, belonging to the field of energy conservation and emission reduction. It includes an ammonia fuel regenerative chamber and a combustion-supporting chamber, both connected to the furnace via connecting ports. The ammonia fuel regenerative chamber is equipped with a three-way reversing valve for introducing ammonia fuel and discharging flue gas. The ammonia fuel regenerative chamber contains an ammonia cracking regenerative body, a denitrification reducing agent injector, and a denitrification regenerative body. The porosity of both the ammonia cracking and denitrification regenerative bodies gradually decreases along the flue gas outflow (ammonia inflow) direction. The combustion-supporting chamber has a combustion-supporting gas inlet. The angle of the denitrification reducing agent injector is adjustable. An ammonia cracking catalyst is mounted on the ceramic skeleton of the ammonia cracking regenerative body. An SCR reduction catalyst is mounted on the ceramic skeleton of the denitrification regenerative body. This utility model can improve flame stability, increase ammonia cracking efficiency and denitrification efficiency, and reduce NO₂ levels in the combustion device. x Emissions will be reduced to achieve zero carbon emissions from the heating furnace.

The invention relates to an ammonia spraying grid with spraying and mixing functions, which is mounted in a flue and consists of a plurality of partition plates which are transversely arranged at equal intervals along the section of the flue, and a plurality of spraying units which are longitudinally arranged at equal intervals along the section of the flue are arranged between the adjacent partition plates; venturi channels are formed between the adjacent spraying units, and each Venturi channel is provided with a convergent section, a throat part and a divergent section; each spraying unit comprises an upper conical section and a lower conical section which are oppositely arranged, the upper conical section and the lower conical section are connected through a straight section located at the throat part of the Venturi channel, and an ammonia spraying opening is formed in the straight section. According to the ammonia spraying grating with the spraying and mixing functions, the venturi channels are constructed between the adjacent spraying units, and the straight sections and the ammonia spraying openings are arranged at the throat parts, so that integration of ammonia spraying and mixing is realized, the mixing distance is greatly shortened, the equipment space is saved, and the system cost is reduced.

This utility model relates to the field of wastewater treatment technology and discloses a biochemical treatment device for high COD and high ammonia nitrogen wastewater. It includes an anaerobic tank, a primary A tank, a primary O tank, a secondary A tank, a secondary O tank, and a UF device connected in sequence. A water seal trough is installed at the outlet of the anaerobic tank, and the water seal trough is connected to the primary A tank via a pipe. A gas stirring device is installed at the bottom of the sealed primary A tank, and the gas stirring device is connected to the outlet of a stirring blower. The top of the primary A tank is sealed, and the top of the sealed primary A tank is connected to the inlet of the stirring blower via a pipe. In this utility model, biogas generated by anaerobic digestion is introduced as the carbon source for denitrification in the sealed secondary A tank, improving the utilization rate of carbon sources within the wastewater and saving the cost of external carbon source supplementation. The large amount of heat generated by aerobic biochemical treatment is used to heat the anaerobic circulating influent through a heat exchanger, increasing the temperature of the anaerobic tank while simultaneously decreasing the temperature of the aerobic tank, achieving energy reuse and enabling the system to achieve a "cost reduction and efficiency improvement" effect.

The invention discloses a thermal power generating unit SCR denitration optimization control system, and the system comprises a current operation state parameter obtaining unit which is used for obtaining a plurality of current operation state parameters of a thermal power generating unit; the vector standardization unit is used for obtaining a current state vector of the thermal power generating unit after the plurality of operation state parameters are subjected to standardization processing; the model input and output unit is used for receiving the current state vector as the input of a denitration optimization model and executing the trained optimal control strategy so as to select the optimal control action of the thermal power generating unit; wherein the denitration optimization model is obtained after a time sequence sub-model and a reinforcement learning sub-model are subjected to stage training; according to the method, the denitration optimization control model is constructed, and the second training data after data enhancement is learned, so that the denitration optimization system can fully consider the historical operation state and trend when executing operation control, and the operation stability and long-term efficiency of the denitration system are improved.

The present invention discloses a high-efficiency flue gas denitrifier and a denitrification treatment process thereof. The denitrifier comprises 85-90 parts by mass of an organic amine reducing agent, 5-8 parts by mass of a polyol polymer, 4-5 parts by mass of a simple organic matter of ketone / benzene, and 1-2 parts by mass of a sodium / potassium metal salt. The treatment process using the above denitrifier comprises atomizing a 25-40°C solution containing 20-40wt% of the denitrifier, and then quantitatively spraying it countercurrently into a 750-1100°C boiler high temperature zone, and then dispersing it into the boiler flue gas, reacting with nitrogen oxides in the boiler flue gas, and reducing the content of nitrogen oxides. The denitrifier provided by the present invention has the advantages of a wide reaction temperature window, high denitrification efficiency, a wide range of adaptability, and economic rationality, and has good application prospects.

The invention discloses a catalyst for low-temperature direct catalytic decomposition denitration as well as a preparation method and application thereof, and belongs to the technical field of direct catalytic decomposition denitration. The preparation method comprises the following steps: by taking potassium ferricyanide, manganese nitrate and polyvinylpyrrolidone as raw materials, preparing a ferromanganese oxide carrier with a hollow structure by adopting a coprecipitation method and high-temperature annealing, and then loading noble metal rhodium on the ferromanganese oxide carrier by adopting an impregnation method, thereby obtaining the denitration catalyst for low-temperature direct catalytic decomposition. When the low-temperature direct catalytic decomposition denitration catalyst is prepared, the reduction-state nano hollow ferromanganese oxide carrier with the hollow structure is adopted, oxidation inactivation of rhodium can be effectively inhibited, and the low-temperature direct denitration activity of the catalyst is greatly improved. The operation process is simple, a reducing agent is not needed, and secondary pollution is avoided; meanwhile, the reaction temperature is low, the denitration efficiency is high, and the direct emission standard of nitric oxide can be met.

The present invention discloses an SCR denitration process applied to the treatment of phenylenediamine waste gas, which belongs to the technical field of industrial waste gas treatment and comprises the following steps: injecting a reducing agent into the flue gas upstream of the catalyst, and performing SCR denitration using a modified kaolin-supported vanadium-titanium catalyst. The present invention provides an SCR denitration process applied to the treatment of phenylenediamine waste gas, which can significantly improve the denitration efficiency in the treatment of phenylenediamine waste gas by introducing a modified kaolin-supported vanadium-titanium catalyst prepared by a specific method into the SCR denitration process, and the denitration efficiency can reach 98.3%, which greatly reduces the emission of NOx in the production of phenylenediamine, and effectively improves the quality of the surrounding environment. The catalyst introduced by the present invention not only has good water resistance and sulfur resistance, but also presents good low-temperature catalytic activity and a wide temperature window, and at the same time well avoids the situation where other particulate matter and other sulfides cause catalyst deactivation and poisoning.

This invention relates to the field of flue gas purification technology, and discloses a denitrification system and method. The system includes a flue gas duct, a recovery device, a temperature control device, and a denitrification device, with the flue gas duct connected sequentially to each device. The flue gas duct is used to introduce the flue gas to be denitrated; the recovery device is used to recover moisture from the flue gas; the temperature control device is used to regulate the temperature of the flue gas; and the denitrification device is used to separate nitrogen oxides from the flue gas. This invention removes moisture from the flue gas beforehand through the recovery device, avoiding the adverse effects of moisture on the denitrification catalyst; the temperature control device regulates the flue gas to a suitable reaction temperature, improving denitrification efficiency; and the denitrification device catalytically reduces nitrogen oxides, achieving efficient and stable denitrification treatment. The entire system has a compact structure and a reasonable process, effectively avoiding ammonia escape and equipment blockage problems in traditional ammonia-based denitrification methods while achieving efficient denitrification, offering advantages such as energy saving, environmental protection, and stable operation.

The present invention discloses a method for preparing a composite catalyst for low-temperature synergistic denitration and dioxin removal. The method comprises adding a molecular sieve modified with metal oxides of cobalt, nickel, palladium, and platinum as a single or combined component to a vanadium-based denitration catalyst to obtain a modified denitration catalyst, and mixing and pasting the activated carbon powder modified with an organic alkali solution with the modified denitration catalyst, and then preparing the composite catalyst through extrusion, drying, and calcination processes. The composite catalyst of the present invention reduces the catalytic temperature of the denitration catalyst and improves the denitration efficiency of flue gas; the activity of the hydroxyl and carboxyl groups of the modified activated carbon is enhanced, and the removal efficiency of dioxins is improved; the modified activated carbon and the modified denitration catalyst are physically combined to achieve synergistic effects on NO in flue gas. X , and efficiently remove dioxins, thereby increasing the service life of the composite catalyst.

The invention is applicable to the technical field of flue gas treatment, and provides a denitration system for a 100MW-grade combined cycle unit, which comprises a mixed conveying part connected with a smoke exhaust pipe of the combined cycle unit, a plurality of denitration assemblies are uniformly and fixedly mounted on the mixing and conveying part; the denitration assembly comprises a fixing frame, a swinging part rotationally arranged on the fixing frame and a rotating part rotationally arranged in the swinging part; a plate-type denitration catalyst is arranged in the rotating part in a sliding manner; the plate-type denitration catalyst comprises three groups of denitration catalyst blocks which are coaxially arranged; according to the device, the positions of the three groups of denitration catalyst blocks are sequentially changed through linkage matching of all the parts, so that full contact between the denitration catalyst blocks at the front end and the rear end of the plate-type denitration catalyst and flue gas is ensured, and meanwhile, full contact between the denitration catalyst block in the middle and the flue gas is ensured; and the utilization rate of the plate-type denitration catalyst is improved, so that waste is reduced.

The present invention relates to a tailwater artificial wetland treatment system and method for enhanced denitrification and phosphorus removal, which comprises a pre-pond, a micron aerated vertical submerged flow wetland, a vertical submerged flow wetland, a horizontal submerged flow wetland and a stabilization pond arranged in sequence; an immersion bioreactor is arranged in the pre-pond, an integrated air / water distributor is arranged at the bottom of the micron aerated vertical submerged flow wetland, a calcareous centimeter stone and a slow-release carbon source composite functional filler are arranged in the vertical submerged flow wetland, and a slow-release carbon source composite functional filler and a sulfur iron functional filler are arranged in the horizontal direction in the horizontal submerged flow wetland. The system first performs preliminary purification, and then performs heteroaerobic denitrification and autoaerobic denitrification in deep purification, and simultaneously enhances phosphorus removal. It has the advantages of reasonable structural design, uniform water distribution and water collection, strong synchronous denitrification and phosphorus removal capabilities, and good winter operation effects, and significantly improves the denitrification and phosphorus removal capabilities and self-repair capabilities of the tailwater artificial wetland system, and has the advantages of ecological naturalness, high efficiency and stability, simple maintenance, and economical and practical.

The invention provides an SNCR device and method, and belongs to the technical field of waste gas treatment.The SNCR device comprises an ammonia gas detector, a nitrogen oxide concentration analyzer and an ammonia water vaporizer, the ammonia water vaporizer comprises a straight pipe section, a top inlet is formed in the top of the straight pipe section, the top inlet is connected with an ammonia water liquid inlet device, and a middle inlet is formed in the middle of the straight pipe section; the middle inlet is connected with a steam inlet device, the bottom of the straight pipe section is provided with a necking section, the bottom of the necking section is provided with a throat part, the bottom of the throat part is provided with a flaring section, the bottom of the flaring section is provided with a bottom outlet, and the bottom outlet is connected with a steam outlet device; according to the invention, the concentration of nitrogen oxide and the concentration of ammonia escape can be adjusted in real time, steam and ammonia water are fully atomized and gasified, and then are rotationally sprayed into flue gas, so that the denitration efficiency is greatly improved, the denitration ammonia consumption and the ammonia escape are reduced, and the denitration reaction temperature interval can be reduced to 750-1100 DEG C.

The application discloses a selective catalytic reduction flue gas heating device, which comprises a flue gas transmission main line and a combustion furnace chamber, the output end of the combustion furnace chamber is inserted into the flue gas transmission main line, a furnace chamber collector and a burner are arranged in the combustion furnace chamber, a control valve is arranged at the input end of the flue gas transmission main line, a main line collector is arranged in the flue gas transmission main line, and the heating device further comprises a collection system, a data analysis system, a control module and a heater. The selective catalytic reduction injection pipe is directly connected to the obliquely-inserted combustion furnace chamber, is used for direct combustion of the burner, the high-temperature flue gas generated by combustion is mixed with the flue gas of the main line of the internal combustion engine to improve the flue gas temperature of the internal combustion engine, the prepared flue gas heating device is compact in structure, convenient to arrange, simple in preparation process, low in cost, convenient to maintain, can adjust the power of the burner according to different exhaust pipe diameters, and is high in thermal efficiency and economic benefits.