12 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.

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.

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 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 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.

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.

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 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.