23 results about "Emission limit" patented technology

The invention discloses a vehicle emission conformity online evaluation method and device, a storage medium, equipment and an evaluation method, and the method comprises the following steps: obtaining a remote monitoring data flow of a to-be-evaluated vehicle in a preset time period, carrying out the preprocessing of the remote monitoring data flow, and generating a valid data set; identifying and segmenting a plurality of independent driving cycles from the effective data set, and screening out the independent driving cycles with cold start characteristics and engine accumulated work not smaller than a preset cycle work threshold value as effective driving cycles; dividing the data of each effective driving cycle into a plurality of preset working condition partitions according to the operating characteristics; aiming at each preset working condition subarea, adopting a corresponding calculation model, and calculating a pollutant emission result of the target pollutant; and comparing the pollutant discharge result of the target pollutant in each subarea with a corresponding preset discharge limit value for judgment. By using the scheme of the invention, low-cost, large-scale and high-frequency emission supervision is realized.

The invention provides a stationary source multistage emission limit value determination method and system based on statistical characteristics, and relates to the technical field of environment monitoring and management. According to the method, the concentration of historical emission monitoring data of a point pollution source is obtained and subjected to quality control, a long-term average value is calculated to serve as a statistical baseline, then a variable coefficient is calculated, and a difference state coefficient across time scales is established; on the basis, the daily maximum concentration limit value, the weekly average concentration limit value and the monthly average concentration limit value are determined in combination with the statistical guarantee rate and logarithmic normal distribution deviation correction; a standardized fluctuation coefficient is further introduced to realize unified expression of a limit value, and the unified expression is multiplied by an average displacement of a corresponding statistical period to obtain a multi-stage load limit value, so that concentration and total quantity collaborative control is realized under a unified statistical framework, and short-term risk suppression and long-term risk constraint are considered; the method has scientificity, fairness and management operability.

The application discloses a kind of control enterprise fuel end carbon emission factor dynamic calibration method and system, by establishing different coal classification identification model, the prediction model of coal combustion carbon emission factor CEF, element carbon content C, low calorific value NCV is established, according to the error absolute value of prediction result further analysis the prediction model, the calibration threshold of three is determined respectively, and the rationality of coal-fired carbon emission factor data of enterprise is carried out automatic calibration using three-level data calibration rule, can identify abnormal data in time, effectively assist third party verification organization to calibrate the accuracy and rationality of enterprise fuel end carbon emission factor result, to effectively guarantee carbon emission accounting data quality.In addition, it also provides basic data support and guidance for the design and operation of carbon market, which helps market managers to master the carbon emission factor trend of different activities and industries, so as to set reasonable carbon emission limit and pricing, effectively guide and promote emission reduction action.

This invention discloses an online evaluation method, apparatus, storage medium, and device for vehicle emission compliance. The evaluation method includes the following steps: acquiring remote monitoring data streams of the vehicle to be evaluated within a preset time period; preprocessing the remote monitoring data streams to generate a valid dataset; identifying and segmenting multiple independent driving cycles from the valid dataset, and selecting independent driving cycles with cold start characteristics and engine cumulative power not less than a preset cycle power threshold as valid driving cycles; dividing the data of each valid driving cycle into multiple preset operating condition zones according to operating characteristics; using a corresponding calculation model for each preset operating condition zone to calculate the pollutant emission results of the target pollutant; and comparing the pollutant emission results of the target pollutant in each zone with the corresponding preset emission limits for determination. This invention achieves low-cost, large-scale, and high-frequency emission supervision.

Method for operating an internal combustion engine (1), in particular a marine diesel engine powered by heavy fuel oil, wherein the internal combustion engine (1) comprises an internal combustion engine (2) for combustion of fuel and an exhaust aftertreatment system (3) downstream of the internal combustion engine (2) for cleaning exhaust gas produced during the combustion of the fuel using a reducing agent and / or an absorbing agent, wherein, depending on the cost of the fuel to be burned in the internal combustion engine (2) and depending on the cost of the reducing agent and / or absorbing agent to be used in the exhaust aftertreatment system (3) for exhaust gas aftertreatment, the internal combustion engine (1) is operated at an operating point in which minimal operating costs for fuel and reducing agent and / or absorbing agent are incurred, characterized in that, based on the engine and exhaust aftertreatment parameters, at least one characteristic value,The so-called identifier is generated, from which all emission-relevant settings can be derived and which indicates compliance with the emission limits and / or the use of the respective characteristic map.

The invention relates to the field of intelligent energy control systems (IES), in particular to a multi-energy complementary low-carbon operation control method based on a Swanger optimization algorithm, which comprises the following steps: constructing a comprehensive energy system mathematical model; a stepped carbon transaction mechanism is introduced and used for setting carbon quotas and carbon emissions in different steps according to the carbon emissions of the system; a South goose optimization algorithm is introduced, and two modes of an exploration stage and a utilization stage in the algorithm are alternately carried out, so that efficient search of a solution space is realized; a system optimization control model is constructed by setting a model objective function, a model balance constraint condition and model equipment power and climbing rate constraints; and testing, evaluating and verifying the model, and comparing operation indexes of the system. The operation cost and carbon emission of the system in a complex environment are remarkably reduced, a more intelligent and more efficient optimization solution is provided for the field of energy management, and the method has remarkable application advantages and wide popularization value.

The present disclosure discloses a synergistic control method and device for emissions, electronic equipment and storage medium. According to the present application, the precise prediction and uncertainty quantification of nitrogen oxide emission concentration are realized through a probability prediction model, and the interpretable emission control rules are extracted and synergistically fused with the preset traditional control strategy to optimize the control logic, thereby improving the control response efficiency under transient operating conditions. Therefore, the technical problem of control instruction lag caused by insufficient calculation efficiency and excessively high load change rate when using model predictive control for transient operating condition control in the prior art can be solved, and the peak breakthrough of nitrogen oxide emission limit value is further triggered. The technical effects of improving the timeliness and accuracy of nitrogen oxide emission control of coal-fired boilers, avoiding emission exceeding the standard, ensuring environmental protection compliance of the unit, and optimizing economic operation indicators are achieved.

The application discloses a full-temperature emission prediction method and device, relates to the technical field of automobile emission, and comprises the following steps: obtaining each pollutant emission test data of each vehicle of the same family as a test vehicle under different environmental temperatures, so as to generate full-temperature emission curves of each pollutant of each vehicle; after normalization processing of the full-temperature emission curves of each vehicle under each pollutant at a preselected environmental temperature, the full-temperature emission curves are collected to construct a full-temperature emission prediction model of each pollutant; inputting the pollutant emission test data of the test vehicle at the preselected environmental temperature into the full-temperature emission prediction model of the pollutant, and outputting the maximum emission value and the minimum emission value of the pollutant under other environmental temperatures; when the maximum emission value under any environmental temperature is less than or equal to an emission limit value, it is judged that the emission is qualified; and when the minimum emission value under any environmental temperature is greater than the emission limit value, it is judged that the emission is unqualified. According to the application, the test frequency can be reduced, and the test cost can be reduced.

The application discloses a control strategy optimization method for balancing the economy and emission of a hydrogen internal combustion engine, and belongs to the field of hydrogen internal combustion engines. x Step 1, determining the BTE target value and NOx emission limit value; step 2, performing single-factor climbing test on injection control parameters and ignition parameters; step 3, reading the BTE value and NOx concentration value obtained through the test to obtain an optimization interval; step 4, designing a test working condition; step 5, carrying out a hydrogen internal combustion engine test to obtain the BTE and NOx data under different injection control parameters and ignition parameters; step 6, establishing a complete second-order response surface optimization equation; step 7, judging the P-value of the BTE and NOx to perform fitting precision inspection; step 8, obtaining a new response surface optimization equation, setting the weights of the BTE and NOx in a response optimizer, and obtaining new injection control parameters and ignition parameters; step 9, based on the new injection control parameters and ignition parameters, carrying out a verification test; and step 10, obtaining calibration parameters for balancing the economy and emission of the hydrogen internal combustion engine. x x x x ​​​​

The application discloses a diesel engine control method, device, equipment and storage medium. The method comprises the following steps: establishing a maximum nitrogen oxide original emission allowance predictor according to the actual efficiency of a preset selective catalytic reduction device (SCR), the current temperature of the SCR, the current exhaust volume, the expected ammonia nitrogen ratio and the downstream emission limit value, so as to determine the maximum original emission value allowed by the diesel engine; determining the emission volume deviation and the fuel consumption proportion coefficient according to the engine speed, the fuel injection volume and the emission proportion coefficient of the diesel engine; determining the candidate proportion coefficient corresponding to the maximum original emission value, and determining the target fuel injection time and the target rail pressure according to the candidate proportion coefficient, the emission proportion coefficient and the fuel consumption proportion coefficient, as well as the candidate fuel injection time and the candidate rail pressure; and performing adaptive control on the ammonia nitrogen ratio of the diesel engine, and performing fuel injection control on the diesel engine in combination with the target fuel injection time and the target rail pressure. The optimal emission control of the diesel engine can be realized, and the diesel engine is helped to save fuel.

The invention discloses an efficient hydrogen internal combustion engine post-treatment method, relates to the field of hydrogen internal combustion engine post-treatment, and solves the technical problems that an existing hydrogen internal combustion engine post-treatment system is high in complexity and poor in low-temperature performance, and the treatment effect is affected by water vapor interference. The method comprises the steps that part of water vapor in exhaust gas of the hydrogen internal combustion engine is converted into condensate water, the inlet NOx concentration is obtained, the inlet NOx concentration is compared with a preset NOx target emission limit value, and when the inlet NOx concentration is larger than the NOx target emission limit value, the needed NH3 synthesis amount is calculated according to the inlet NOx concentration and the preset NOx target emission limit value; and according to the required NH3 synthesis amount, the injection rate and the plasma power are calculated, the flow of condensate water is controlled according to the injection rate, and the plasma power serves as the output power of the PSCR reactor. The invention further discloses a high-efficiency hydrogen internal combustion engine aftertreatment system. The method does not depend on urea, and the installation cost of a urea-related treatment device is reduced.

The application provides a thermal power unit intelligent combustion adjustment method and system based on multi-objective optimization, relates to the technical field of multi-objective optimization, and comprises the following steps: acquiring working condition parameters, predicting a load demand trajectory and an emission limit value change curve, constructing a time sequence associated multi-stage optimization target, and coupling combustion efficiency, pollutant emission and equipment load into a multi-objective function through time attenuation weight; a Pareto frontier solution set is obtained by solving, and a combustion adjustment parameter is selected and issued; feedback data is collected, and a dynamic weight adjustment mechanism is used to adaptively update weight configuration. The application realizes intelligent regulation and control of combustion parameters, improves unit operation efficiency, and reduces pollutant emission.

The invention discloses a gasoline engine tail gas purification three-way catalyst, which comprises a carrier and a coating coated on the carrier, the coating comprises a lower coating and an upper coating which are arranged in sequence, and the upper coating comprises alumina, a Ce-Zr composite oxide, an Mg-Co-Ni-Fe active component compound and a salt auxiliary agent. The Mg-Co-Ni-Fe active component composed of base metal is introduced into the coating of the catalyst, the emission concentration value of NH3 in waste gas can be greatly reduced under the condition that precious metal Ru is not used, the catalyst can more easily meet the emission limit value of NH3 in laws and regulations, the good ammonia treatment effect on internal combustion engines such as gasoline engines is achieved, and the service life of the catalyst is prolonged. Meanwhile, the cost of the catalyst is reduced.

This application discloses a diagnostic method, device, and computer storage medium for an engine, belonging to the field of fault diagnosis technology. The method includes: acquiring multiple actual fuel injection factors that adjust the actual fuel injection quantity of a vehicle engine in real time at preset time intervals within a preset time period; determining whether an engine fault exists by judging whether the multiple actual fuel injection factors exist under different engine operating conditions, and whether the multiple actual fuel injection factors under different engine operating conditions fall within a first fuel injection factor range corresponding to the engine operating condition and whether they fall within a preset second fuel injection factor range where the vehicle's exhaust emissions do not exceed emission limits. In this application embodiment, determining whether an engine fault exists by performing multiple conditional judgments on the actual fuel injection factors under different engine operating conditions makes engine fault diagnosis more accurate.

The invention relates to a method, in particular a computer-supported method, for operating a gas turbine system, the method comprising the following steps: - detecting the nitrogen oxide emissions of the gas turbine system over a respective observation period; - determining the average nitrogen oxide emissions over a plurality of successive observation periods; - comparing the average nitrogen oxide emissions with an emission limit value; - adapting operating parameters in order to reduce the nitrogen oxide emissions if the average nitrogen oxide emissions exceed the emission limit value.

The invention discloses an activated carbon adsorption saturation judgment and waste gas emission detection method for tire vulcanization VOCs (Volatile Organic Compounds). The method comprises the following steps: detecting the concentration of target pollutants at an inlet and an outlet of an adsorption bed for adsorbing the tire vulcanization VOCs by adopting a cobalt-doped zinc oxide semiconductor gas sensitive sensor; when the concentration of the target pollutant is increased to the preset concentration, the VOCs outlet concentration does not meet the emission limit value; when the adsorption efficiency of the activated carbon to the target pollutants is lower than a preset value, the adsorption capacity of the activated carbon for adsorbing the tire vulcanization VOCs reaches a saturated state, and the activated carbon needs to be replaced or regenerated; wherein the target pollutants comprise at least one of acetone, cyclohexane and methyl cyclohexane. Before the VOCs are discharged, the concentration of the target pollutants at the outlet of the purification equipment is detected to judge whether the VOCs produced by tire vulcanization really reach the standard or not and judge the adsorption saturation degree of the activated carbon.

Various aspects of the present disclosure generally relate to configurations to satisfy band-specific power emission requirements. For example, a user equipment (UE) may obtain an indication of a power emission requirement applicable to a frequency band configured for the UE, and may transmit such that a power of any emission by the UE in a protected frequency range satisfy the applicable power emission requirement. In some aspects, the indication may be a network signaling (NS) value that indicates a frequency range protected from unwanted emissions in another frequency band, and a maximum power emission limit for emissions in the protected frequency range. Additionally or alternatively, the indication to implement the power emission requirement may be that the UE is in a location or area where the power emission requirement is enforced.

The invention discloses a total nitrogen emission limit value determination method and system based on multi-source data, and relates to the technical field of data analysis. The method comprises the following steps: firstly, collecting multi-source historical deviation data of a target emission source, carrying out offset analysis on the multi-source historical deviation data to obtain a historical deviation characterization index value of the target emission source, then obtaining operation data of the target emission source, carrying out working condition association processing on the operation data to obtain a working condition stability evaluation value of the target emission source, deviation risk analysis is carried out based on the historical deviation characterization index value and the working condition stability evaluation value, a deviation amplification risk evaluation result of the target emission source is obtained, finally, according to the deviation amplification risk evaluation result, verification correction processing is carried out on the initial total nitrogen emission limit value, and the corrected total nitrogen emission limit value of the target emission source is obtained. And the corrected total nitrogen emission limit value is issued to an emission regulation and control unit for emission configuration, so that the accuracy and reliability of emission control can be improved while safe operation of an emission control system is ensured.

The application creatively applies source strength estimation error analysis to the emergency sampling position optimization problem of the walk-by monitoring vehicle, and proposes an emergency sampling position optimization method for the walk-by monitoring vehicle in a chemical industry park. The method can optimize the optimal emergency sampling position of the walk-by monitoring vehicle under the condition that the walk-by monitoring vehicle has measurement errors and the sampling position is limited, so as to complete the positioning of the over-standard emission source in the chemical industry park together with the fixed monitoring station. For the sampling point distributed in the upwind direction of the pollution source, the source strength estimation error of the sampling position set containing the sampling point and the sampling position set not containing the sampling point can be compared to exclude the sampling position. For the sampling position set distributed in the downwind direction of all pollution sources, the optimal emergency sampling position of the walk-by monitoring vehicle is optimized based on the Gaussian plume diffusion model. The source strength of each emission source is obtained by back calculation from the sampling data and the monitoring data of the fixed monitoring station. The over-standard emission source is positioned by comparing the emission limits of each emission source.

Method for operating a system (1; 21) consisting of several internal combustion engines (2, 3; 22, 23), wherein the internal combustion engines (2, 3; 22, 23) are coupled such that partial drive powers provided by running internal combustion engines (2, 3; 22, 23) are taken off by at least one common consumer (4; 24), wherein the internal combustion engines (2, 3; 22, 23) are operated such that the total drive power provided by the running internal combustion engines (2, 3; 22, 23), which corresponds to the sum of the partial drive powers, corresponds at least to the power required for the common consumer(s) (4; 24), and wherein, with the required power being provided, an individual operating point is determined for each running internal combustion engine (2, 3; 22, 23) and the respective internal combustion engine (2, 3; 22, 23) is operated at this individual operating point. namely such that for the system (1;21) while complying with emission limits, minimal operating costs are incurred, for each internal combustion engine (2, 3; 22, 23) an individual operating point is determined such that the system (1; 21) incurs minimal operating costs from operating costs and maintenance costs.;

The present application relates to a kind of hydrogen internal combustion engine near zero emission control method and system based on oxygen medium regulation, and multiple operating parameters including intake oxygen concentration are collected by engine control unit, and engine load is determined according to speed and torque and the pre-calibrated nitrogen oxide emission mapping is inquired.According to the preset emission limit, the maximum intake oxygen concentration that meets the limit value is obtained as the target value by the mapping backtracking, and the measured value is tracked by adjusting the low-pressure exhaust gas recirculation valve to directly inhibit the generation of nitrogen oxides.At the same time, based on the target torque and the target intake oxygen concentration, the target available oxygen proxy amount is calculated, the target intake volume is backtracked and converted into the target intake manifold pressure, and finally the measured pressure is tracked by adjusting the turbocharger to track the target.Compared with the prior art, the present application meets the strict emission requirements while ensuring the engine torque output, achieving the coordinated optimization of emission and power.

The application discloses a coal gas blending method and system meeting SO2 standard emission and calorific value requirements, relates to the technical field of SO2 standard emission, and aims at solving the problem of insufficient economy of the existing SO2 standard emission method of the heating furnace coal gas; the application comprises the following steps: according to the composition of the to-be-burned gas, the actual value and the theoretical emission limit of the SO2 in the flue gas after burning, the actual total sulfur content and the maximum allowable value of the to-be-burned gas are calculated; the to-be-burned gas is divided into two types, i.e., sulfur-exceeding gas and low-sulfur gas; at least one of the two types of gas is mixed; the SO2 in the flue gas after mixing does not exceed the theoretical emission limit, and a plurality of mixed gas proportions are obtained; the mixed gas is classified into a calorific value standard group and a non-standard group; at least one mixed gas in each group is mixed and blended to meet the calorific value requirement; and according to the blending result, each to-be-burned gas is supplied to the heating furnace in proportion; the application has the advantages of simple steps, convenient operation, low cost, good economy and easy realization.

The application provides an ammonia fuel ship engine system and a tail gas aftertreatment system thereof, which comprises: a nitrous oxide reactor, a denitrogenated oxide reactor, an ammonia oxidation catalyst reactor and an exhaust system arranged in sequence; a first communication bypass is connected between an inlet end and an outlet end of the nitrous oxide reactor; a second communication bypass is connected between an inlet end and an outlet end of the ammonia oxidation catalyst reactor; according to processing control logic and emission control logic, corresponding passages are controlled by corresponding different valves. The application cooperatively processes main nitrogen-containing pollutants of the ammonia fuel ship engine, arranges different paths according to different combustion modes and different possibilities of exhaust components, can significantly reduce the emission level of the ammonia fuel ship, and meets the emission limit of the main nitrogen-containing pollutants of the ammonia fuel ship engine at present and in the future.