263results about How to "Improve denitrification efficiency" patented technology

The invention discloses a precise ammonia spraying control method and system suitable for coke oven flue gas denitration, and the method comprises the steps: collecting historical data and real-time data of coke oven flue gas flow and NOx concentration, carrying out the modeling of the collected historical data of the flue gas flow and NOx concentration through a time series prediction algorithm, and carrying out the calculation of the model; the flue gas flow and the NOx emission value in a period of time in the future are predicted, the corresponding ammonia spraying amount is calculated based on the flue gas flow and the NOx emission value predicted by the model, the system monitors the actual NOx emission value in real time and compares the actual NOx emission value with the predicted value, and if obvious deviation exists, the ammonia spraying amount is determined. If yes, the prediction model is corrected in the next period, the calculated ammonia spraying amount data is transmitted to a denitration master control system, the denitration master control system automatically adjusts an ammonia supply valve, if the denitration precise ammonia spraying control system breaks down, an alarm is triggered immediately, the mode is automatically switched to a manual control mode, and the manual control mode is switched to a manual control mode. Accurate control and stability of total ammonia regulation of the denitration system are realized.

The invention discloses a refined ammonia injection control system for a coal-fired power plant, and relates to the technical field of ammonia injection control systems for power plants. The real-time monitoring module is used for monitoring NOx concentration, oxygen content and temperature parameters in flue gas in real time and transmitting data to the central processing unit; and the prediction model construction module is used for constructing an NOx generation prediction model by utilizing a machine learning algorithm according to the historical data and the real-time monitoring data. Through the real-time monitoring module, the system can continuously track key parameters such as NOx concentration, oxygen content and temperature in flue gas; the control decision is ensured to be based on the latest environmental condition, so that the response speed and accuracy of the ammonia spraying system are improved; the NOx generation prediction model constructed by using a machine learning algorithm not only considers historical data, but also integrates real-time monitoring data, so that the model can accurately predict the NOx concentration change trend in a period of time in the future; and the system can predict and adapt to the future emission condition.

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 invention relates to the technical field of environment-friendly equipment, in particular to an efficient energy-saving type waste gas treatment system and process for a biomass and garbage boiler, and the treatment system comprises an air preheater, a dry desulphurization device, a dust remover, a low-temperature denitration device, a heat exchanger and a chimney which are sequentially connected at an outlet of the boiler. An inlet and an outlet of a first heat exchange channel of the heat exchanger are connected with a low-temperature denitration device and a chimney respectively, and an inlet and an outlet of a second heat exchange channel of the heat exchanger are connected with air and an air preheater respectively. Therefore, the temperature of waste gas in desulfurization, dust removal and denitration links is increased, and finally heat energy is recycled by the heat exchanger. The process is free of additional energy supplement, the emission temperature is reduced, the heat energy loss is less, the advantages of energy conservation and emission reduction are achieved, the denitration reaction temperature is increased, and the denitration efficiency is improved.

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 utility model provides a grate-fired furnace SCR denitration catalytic device which comprises a vertical flue, an inclined flue, a transverse flue, an ammonia spraying grid, a static mixer, a guide plate and a catalyst layer, the vertical flue, the inclined flue and the transverse flue are sequentially communicated end to end, a flue gas inlet is formed in the side wall of the vertical flue, and an outlet of the transverse flue is a flue gas outlet; the ammonia spraying grid is fixed on the inner wall of the vertical flue and is connected with an ammonia source, and an air spraying opening of the ammonia spraying grid is arranged upwards; an input port of the static mixer corresponds to the upper part of the air nozzle and is fixed on the inner wall of the vertical flue; the plurality of flow guide plates are arc-shaped plates, are arranged in parallel and are fixed at the joint of the vertical flue and the inclined flue; the SCR denitration catalytic device of the grate-fired furnace belongs to the technical field of SCR denitration, enables flue gas and ammonia gas to be fully mixed, enables a flow field to be uniform, and improves the effect of reducing nitric oxide 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 invention relates to the technical field of flue gas purification, in particular to flue gas desulfurization, denitrification and dust removal separation equipment which comprises a separation mechanism, a laminar flow reactor, a mixed flow impeller and a desulfurization reactor. The separation mechanism is connected with the air inlet pipeline; the laminar flow reactor is connected with the separation mechanism; the mixed flow impeller is connected between the separation mechanism and the laminar flow reactor; the desulfurization reactor is connected with the laminar flow reactor; oily particles are preliminarily separated through centrifugal force, after flue gas internally rotates and ascends, a secondary filter screen is driven by the ascending force of the flue gas to shake at high frequency to secondarily filter the oily particles, meanwhile, the oily particles are separated again through the internal rotation force of the flue gas, and the flue gas and ammonia gas are fully mixed and pre-distributed through a mixed flow impeller, so that the denitration efficiency is improved; the problems that the catalyst is damaged due to the fact that oily particles in flue gas cannot be effectively filtered, and the denitration efficiency is reduced due to non-uniform distribution when the flue gas reaches a fluidized bed are solved.

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 invention relates to a high-temperature denitration method based on a RTO system under a complex working condition. The method comprises the following steps: feeding waste gas into a lower-layer heat accumulator of a heat accumulation chamber under a gas inlet working condition through a waste gas inlet valve for primary preheating; the waste gas subjected to primary preheating is fed into a denitration reducing agent dynamic mixing chamber, and is uniformly distributed and uniformly flows with a denitration agent in the mixing chamber; feeding the waste gas subjected to uniform distribution and flow of the denitration agent into an upper-layer heat accumulator for secondary preheating; the waste gas is subjected to oxygenolysis of VOCs in the combustion chamber and high-temperature denitration reaction of nitrogen oxides generated by oxidizing nitrogen-containing organic matters and a denitration agent. By arranging the denitration agent pre-gasification chamber and arranging the denitration reducing agent dynamic mixing chamber in the RTO furnace heat storage chamber, the reaction retention time of a reducing agent and waste gas in a high-temperature area is prolonged, the incomplete reaction of the reducing agent entering a smoke discharging and cooling stage along with smoke due to the fact that the reducing agent is directly added into a combustion chamber is solved, the denitration reaction efficiency is improved, and the energy consumption is reduced. The usage amount of a denitration reducing agent is reduced, and the problem that traditional SCR is high in energy consumption is solved.

The utility model relates to an SNCR (selective non-catalytic reduction) and SCR (selective catalytic reduction) collaborative denitration ultra-low emission system for a coal-fired boiler. The system comprises an SNCR denitration unit, a primary economizer, an airflow uniform distribution device, an SCR denitration unit and a secondary economizer, the SNCR denitration unit consists of an ammonia water / urea solution tank, a delivery pump and a spray gun; and the SCR denitration unit comprises an SCR layer. The system disclosed by the utility model is simple and reasonable in structure, reliable in operation, low in investment and operation cost, long in service life and free of secondary pollution, and the NOx-containing flue gas of the coal-fired boiler can be efficiently denitrated and purified.

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 discloses a preparation method of an SCR (Selective Catalytic Reduction) denitration catalyst, which belongs to the technical field of denitration catalysts and comprises the following steps: mixing and stirring composite gel, a metal nitrate compound and deionized water to obtain slurry; and dipping the pretreated foamed nickel into the slurry, stirring, calcining, and cooling to room temperature to obtain the medium and low temperature SCR denitration catalyst. The dispersity of the modified graphene oxide and the modified carbon fiber in the denitration catalyst is improved by the composite gel; the composite gel and the metal nitrate are compounded to form slurry to be adsorbed into a porous structure of the foamed nickel, a lignin cross-linked network mechanism in the composite gel contains a large number of hydroxyl sites, adsorption sites are provided for active components in the metal nitrate, the active components are evenly dispersed on the composite gel, and the adsorption efficiency is improved. The contact area of the catalyst and nitrogen oxide is increased.

The present invention discloses an integrated RTO device and process for treating VOCs and coordinating denitration. The device includes a connected combustion chamber and a plurality of heat storage chambers. The combustion chamber is located at the upper part of the heat storage chamber. A burner is arranged in the combustion chamber. Each heat storage chamber is provided with a first-stage heat storage body, a second-stage heat storage body loaded with an SCR catalyst, a third-stage heat storage body and a fourth-stage heat storage body from top to bottom. A first-stage reducing agent dispersion device is arranged above the second-stage heat storage body. Each heat storage chamber is independently provided with an inlet valve connected to an organic waste gas pipeline at the input end, an outlet valve connected to a purge air pipeline at the input end, and a purge valve. The process includes the steps: S1 exhaust gas enters the heat storage chamber in the intake working condition through the inlet valve, enters the combustion chamber after being heated by the heat storage chamber, and an oxidation reaction occurs to remove VOCs; S2 exhaust gas then enters the heat storage chamber in the outlet working condition, and is discharged through the outlet valve after denitration; S3 reciprocates to adjust each heat storage chamber to the corresponding required working condition to achieve the treatment and denitration of VOCs.

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 a nozzle arrangement design method for a urea direct injection pyrolysis technology in a transition flue of a gas turbine, comprising the following steps: 1) establishing a solid geometric model of a flue of equal dimensions; 2) determining the number of nozzles, and determining various arrangements of the nozzles under the number of nozzles; 3) simulating the ammonia distribution of an inlet cross section of an SCR system under various arrangements of the nozzles under the premise that the total urea flow rate, flue gas parameters and flue gas flow rate are the same, and adjusting the flow rate of each nozzle at the same time, so as to obtain the variation law of the ammonia distribution of the inlet cross section of the SCR system with the nozzle arrangement and the flow rate of each nozzle; 4) according to the variation law of the ammonia distribution of the inlet cross section of the SCR system with the nozzle arrangement and the flow rate of each nozzle, determining the optimal nozzle arrangement and the corresponding nozzle flow rate under the current number of nozzles, so as to make the ammonia distribution of the inlet cross section of the SCR system uniform. The method can design and determine the arrangement of the nozzles, the number of the nozzles and the flow rate of each nozzle.

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 discloses a harmless treatment process for flue gas generated after waste incineration. The harmless treatment process for the flue gas generated after waste incineration comprises the following steps that firstly, flue gas in an incinerator is introduced into a preheating pipeline preset in the furnace wall of a preheating furnace to heat to-be-treated waste in the preheating furnace; secondly, the flue gas led out of the preheating furnace is connected into a water-cooling cyclone separator to be subjected to gas-solid separation, and the separated flue gas continuously passes through a deacidification treatment section, an activated carbon adsorption treatment section and a filtering section on a flue and then is connected into an SCR treatment system; the deacidification treatment section comprises two volute type alkali powder mixers, the activated carbon adsorption section comprises an activated carbon spraying mechanism arranged along the circumferential section of the flue, and the filtering section is provided with a bag-type dust collector. By means of the mode, the temperature of inlet air entering the SCR system can be increased, the denitration efficiency is improved, waste water needing to be treated cannot be additionally generated, and the overall treatment cost is low.

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.

The invention provides a system for improving denitrification treatment efficiency of a sewage membrane concentrated solution. The system comprises a denitrification device which receives an upstream to-be-treated solution from a source of a membrane concentrated solution and denitrifies the upstream to-be-treated solution in a body of the denitrification device to form a denitrification solution; and the particulate matter suspension device is used for suspending endogenous particulate matters in the denitrification liquid in the denitrification device body so as to improve the denitrification efficiency. In addition, the system can further comprise a rotational flow device, a particulate matter shaping pore plate, a deposition bin and the like so as to further improve the denitrification treatment efficiency.

The present invention relates to a denitration automatic control process method under the urea ammonia production mode, which includes two methods: (1) obtaining the best ammonia injection flow rate in the reaction zone to keep the outlet NOx concentration stable and up to standard under severe working conditions; (2) adding judgment logic for the measured value of the NOx concentration at the outlet of the reaction zone. The present invention avoids the waste of working fluid and air preheater blockage caused by excessive ammonia injection of the regulator, or the environmental protection problem of not meeting the standard caused by insufficient ammonia injection, and can still maintain a high regulation quality and ideal denitration efficiency.

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.