87results about How to "Avoid Excessive Emissions" patented technology

The invention discloses a method for controlling the oil injection of a diesel engine, which is used for reducing tail-gas pollution. The method comprises the following steps: calculating a demanded injected oil amount by a control unit according to an air inflow measured by an air inlet sensor, calculating actual air inflow according to the engine displacement, the cylinder number of the engine,the volumetric efficiency of engine, the information of engine speed and the actual intake pressure which is measured by a boost pressure sensor in a pressurization system, obtaining calibration values by looking up a gauge according to the engine speed information and the engine gear information, and finally obtaining a maximum injected oil amount according to the actual air inflow and the calibration values, wherein the calibration values refer to a specific value of air inflow and injected oil amount of maximum torque (obtained through a pretest) of the engine under the condition that the engine is at a special gear and a special speed, and the tail gas is up to the standard; when the demanded injected oil amount is greater than the maximum injected oil amount, the control unit controls the actual injected oil amount according to the maximum injected oil amount, and when the demanded injected oil amount is less than or equal to the maximum injected oil amount, the control unit controls the actual injected oil amount according to the demanded injected oil amount.

The invention discloses a low-nitrogen condensation wall-mounted furnace and an application method thereof. The low-nitrogen condensation wall-mounted furnace comprises a draught fan, a fume collecting hood, a gas valve and a water-cooling combustor. An inner cavity of a gas distributing pipe of the water-cooling combustor is divided into two independent sections through a block plate, and each section is connected with a gas inlet joint. The gas valve is composed of a main on-off valve, a proportion regulating valve and two on-off valves, the main on-off valve is connected with a main gas inlet pipe, and outlets of the two on-off valves communicate with the two sections of the gas distributing pipe separately. The gas distributing pipe is sectioned, all fire rows or a part of fire rows on the gas distributing pipe are controlled to combust, small duty ratio is reduced, and the problems of flameout and too hot water temperature in summer can be solved. In addition, the constant-speed draught fan is adopted for the wall-mounted furnace, so the problem of corrosion of condensate water to a main heat exchanger can be solved. A ventilation baffle is further arranged at the bottom of the fume collecting hood to solve the problem of excessive CO emission under limit gas test conditions. Through experimental verification, when the small load regulation ratio of the wall-mounted furnace is between 0.35-0.5, the problems of flameout and too hot water temperature in summer can be solved.

The invention provides a vehicle control method, device and system and a vehicle. According to the vehicle control method and device, firstly, a working state signal of an engine is firstly received, and whether the engine is in a working state or not is judged; if the engine is in the working state, a control signal for detecting the state of a vehicle door is transmitted; a state signal of the vehicle door is received, and whether the vehicle door is opened or not is judged; if the vehicle door is opened, a control signal for detecting the position of an electronic key is transmitted; a position detection result signal of the electronic key is received, and the distance between the electronic key and the vehicle is obtained; when the distance between the electronic key and the vehicle exceeds a preset distance, a control signal for controlling the engine to stop working is transmitted. Even when a driver forgets to shut down the vehicle when leaving the vehicle, the engine can automatically stop working after the driver is away from the vehicle, the threat of toxic gas such as carbon monoxide generated by running of the engine to health is avoided, and potential safety hazards are eliminated.

The embodiment of the invention provides an abnormity positioning method and device and an electronic control unit. The method comprises the following steps that conversion efficiency of a selective catalytic reduction system is acquired after detecting that the electronic control unit is electrified and starts an engine; if the conversion efficiency is less than preset conversion efficiency, theconversion efficiency is determined to be abnormal, and a pressure value of a urea pump in the selective catalytic reduction system is acquired; reasons that the conversion efficiency is abnormal aredetermined according to the pressure value of the urea pump, wherein the reasons that the conversion efficiency is abnormal comprise the blockage of a urea nozzle in the selective catalytic reductionsystem, the aging of a catalyst in the selective catalytic reduction system or the insufficient amount of urea sprayed through the urea nozzle; and the reasons that the conversion efficiency is abnormal are sent to an alarm device. According to the method, the accuracy of positioning the reasons of the abnormal conversion efficiency can be improved, and after the reasons that the conversion efficiency is abnormal are accurately positioned, the reasons are sent to the alarm device, so that the related personnel can directly solve the problem that the conversion efficiency is abnormal successfully according to the reasons.

The invention discloses an online broken bag blocking device for a pulse jet bag type dust collector. The device comprises a closing plate, a spacer and a screw rod. The closing plate and the spacer are superposed on each other and are provided with corresponding installing holes; the lower end of the screw rod is provided with a hook; the top end of the screw rod is inserted into the installing hole from the lower side of the spacer and extends out of the closing plate; and a nut is screwed at the extension end of the screw rod. A broken bag of the dust collector is rapidly blocked by using the closing plate, so online maintenance time of equipment is shortened; the equipment can run normally as soon as possible; and the accident risk of online maintenance of the dust collector is reduced. Simultaneously, the device reduces possibilities of causing fluctuation on a working condition of a dust-collecting system, affecting the running of an entire production line and causing an equipment failure due to a large amount of intake air into the dust collector after a top door is opened in an online maintenance process of the dust collector, and provides an emergency measure for the situation that no new filter bag is available for replacement on field when the bag of the dust collector is broken.

The invention discloses an electric precipitation energy-saving control method based on the coal quantity and the air quantity of a boiler. The method comprises the steps: obtaining current total coalquantity and current total air quantity of the boiler and electric precipitator outlet dust content; and calculating an electric field secondary current target value according to a formula II2=[(T-Ttarget)/(Tmax-Tmin)]*(II2max-II2min)+IIcoal+IIw, and adjusting the current electric field secondary current value of the electric precipitator to an electric field secondary current target value. Therefore, the total coal quantity of the boiler is used to replace the unit load to control the electric precipitation parameters, the control deviation caused by coal quality change can be overcome, andthe real-time performance is better than that of the unit load; meanwhile, the total air quantity of the boiler serves as a feedforward signal, and a dynamic control effect of dust in the unit load dynamic change process can be improved; and therefore, the automatic control effect of the electric precipitator can be improved, excessive dust emission of a power plant is prevented, the environment-friendly purpose is achieved, the power utilization rate of the power plant is reduced, and the energy-saving purpose is achieved. The invention further discloses an electric precipitation energy-saving control system based on the coal quantity and the air quantity of the boiler, and the beneficial effects are as mentioned above.

The invention relates to a novel sulfur tail gas hydrogenation catalyst and a preparation method thereof. Active components in a form of sulfides of the catalyst are supported on a catalyst carrier. The active components are sulfides of cobalt, molybdenum and nickel. The catalyst has the characteristics of no pre-vulcanization, high initial activity and good stability. The catalyst is in a vulcanized state and does not need to be vulcanized in use. Through use of the catalyst, sulfur device problems of environmental protection and safety during pre-vulcanization are avoided, excessive emission of SO2 during sulfur device operation is avoided, green operation is realized and significant economic and social benefits are obtained.

The invention provides an intelligent alarm bag type dust removing device, which device comprises an upper box body, a pattern plate, a middle box body, a cloth bag, a bag cage, a lower box body, a signal line, a PLC control cabinet and a DCS system, wherein a bag cage cap is arranged at the top of the bag cage, the bag cage is longitudinally provided with longitudinal ribs and is transversely provided with reinforcing rings, and a blowing protection device and a cloth bag performance monitoring system are arranged at the upper portion of the bag cage. According to the invention, by arrangingthe blowing protection device, the cloth bag can be protected from being damaged due to the improper installation of the blowing device; by arranging the cloth bag performance monitoring system in thecavity of the double-layer blowing protection device, laser with a certain intensity is emitted through the laser emitting device, if the cloth bag is damaged, dust penetrates through the cloth bag to cause the dust concentration in the cloth bag to exceed the standard, the intensity of the laser reaching the receiver is weakened due to the scattering effect of the dust, and the signal is transmitted to the PLC control cabinet and the DCS system after being processed by the signal processor; and if the cloth bag is damaged in the operation process of the dust removing device, the damaged cloth bag can be directly positioned, the alarm is given out, and the operator can immediately determine the position of the damaged cloth bag in the DCS system and replace the damaged cloth bag.

The invention provides a spraying nozzle blocking diagnostic system and method for a urea water solution spraying system. The urea water solution spraying system comprises a liquid storing tank, a spraying nozzle, and a pump connected between the liquid storing tank and the spraying nozzle through a fluid pipeline. The spraying nozzle blocking diagnostic system comprises a sensor module used for detecting fluid pressure in the fluid pipeline, and a control module used for receiving and analyzing a pressure detecting value of the sensor module and controlling the pump. The control module can control the pump to be started n times so that the spraying nozzle can pump back, wherein n is an integer and is larger than or equal to 1. For each time of pumping back process of the spraying nozzle,within a certain preset time interval, the sensor module detects the pressure value in the fluid pipeline, the detected pressure value is integrated through the control module, thus an integration value is obtained, and the control module judges whether the spraying nozzle is blocked or not and/or judges the blocking degree of the spraying nozzle according to n integration values obtained on the such basis.

The invention provides a motor vehicle intelligent maintenance guidance system based on OBD. The system comprises a data collection device and an intelligent maintenance guidance platform which are connected, the data collection device comprises a data collection module and a data transmission module, and the intelligent maintenance guidance cloud platform comprises a fault code maintenance dictionary module, an accessory management module and a maintenance guidance module. According to the invention, accurate positioning of vehicle faults is realized, the problems of over-standard emission, incomplete maintenance and the like of vehicles are solved, the quality of maintenance personnel is improved, thorough maintenance of vehicles is ensured, and emission of automobile exhaust pollutantsis reduced.

The invention discloses a method for selecting a model of an electrostatic dust collector for deeply cooling flue gas. The method comprises the following steps: calculating an ash sulfur ratio, takingan apparent migration velocity of a coal, calculating an effect-raising influence factor, calculating the effect-raising influence factor of the apparent migration velocity and calculating the effect-raising influence factor of the apparent migration velocity of a rotary electrode pair, according to a present coal model and design parameter requirements; calculating a dust-collecting area acquired by the electrostatic dust collector according to a calculation mode for the dust collecting efficiency of the electrostatic dust collector; selecting a suitable electrostatic dust collector model. The invention has the advantages that main influence factors and rule of the dust collecting efficiency of the electrostatic dust collector for deeply cooling flue gas are excavated; a specific calculation formula is provided for accurately calculating the dust collecting efficiency and specific model of the electrostatic dust collector for deeply cooling flue gas; the dust emission at an outlet exceeding standard caused by smaller model selection design and the waste problems of materials, sites, running power consumption and the like, caused by oversize model selection design can be avoided.

The invention discloses a self-regulation cut-in air inlet type efficient composite dust removal device, which comprises a device body, wherein a plurality of separation cones are arranged in a cyclone sedimentation region; fine holes are formed in the bottom of a gravity sedimentation region; an opening is formed in the top in the gravity sedimentation region; the surface of the opening is abutted against a magnetic plate; an electromagnet is arranged right under the magnetic plate and is positioned at the bottom of the gravity sedimentation region; fine holes are formed in the bottom of an electrostatic adsorption region; guide posts are arranged at two sides in the electrostatic adsorption region; a moving element sleeves each guide post; a moving plate is fixedly connected onto each moving element; micropores are uniformly distributed in the moving plate; a power supply plug is fixed on the surface of the moving plate; a socket is fixed on the inner wall of the top of the device body. The device has the advantages that dust in smoke gas can be effectively removed through cyclone and cloth bag filtering effects; the dust removal efficiency is high; the dust removal effect is good; after a cloth bag assembly is burnt, the device can be switched to an electrostatic adsorption dust removal mode for dust removal; the condition that the smoke gas dust discharged in a standard exceeding way due to the cloth bag burning is avoided.

The invention relates to the technical field of waste gas detection and discloses an industrial waste gas detection system. The system comprises a flue, a gas sampling probe, an electromagnetic valve, a wattmeter, an air compression pump, an electric ball valve, a filter, a condenser, a sucking pump and an analysis cabinet, wherein the gas sampling probe is installed on the flue, the electromagnetic valve is communicated with the gas sampling probe through a pipeline, the wattmeter is communicated with the electromagnetic valve through a pipeline, and the air compression pump is communicated with the wattmeter through a pipeline. According to the industrial waste gas detection system, under the operation of a sucking pump, waste gas in a flue passes through a filter and a condenser under the collection of a gas sampling head, the waste gas is cooled, and particles in the waste gas are removed, so that the waste gas is guided into an analysis cabinet for detection, and ultra-clean, constant-temperature and constant-flow stable gas is obtained; therefore, accuracy and reliability of the analyzer are ensured.

The invention discloses a method for low-temperature catalytic ozone treatment of high-humidity organic waste gas, and belongs to the field of waste gas treatment. According to the method, firstly, high-humidity organic waste gas is dehumidified by a water absorbent, the dehumidified organic waste gas is properly heated by a heating device and then is mixed with ozone, and a degradation reaction is carried out in a catalyst bed layer, so that direct contact between a large amount of water and a catalyst is avoided, and the degradation efficiency of the organic waste gas, the stability of the catalyst are improved, and the long-term stable operation of the device is ensured; and meanwhile, the reaction tail gas with a certain temperature is used for regenerating the water absorbent, so that the heat is fully utilized, and the energy consumption is reduced.

The invention discloses a microorganism power generating method by utilizing carbon source in a recycling way, comprising the following steps: a) nutritional type microorganisms of light are placed in an illumination bioreactor, liquid nutrient solution is added, carbon dioxide gas is introduced, the microorganism enrichment products at the upper part of the floating illumination bioreactor are output; b) the microorganism enrichment products are input in a methane generator, the generated methane liquid is input in the illumination bioreactor, and the generated methane is input in a combustion motor in a generator set for burning; c) the output carbon dioxide gas is input to the illumination bioreactor. In the method, the luminous energy nutritional type microorganisms are used as primary material for marsh gas power generation, non-renewable resources are not consumed, and harmful gas is not exhausted. By adopting the way of circulating utilization, all products in the process flow can be used.

The invention provides an early warning method and an early warning system for preventing SO2 standard-exceeding emission of desulfurized flue gas and application of the early warning method and the early warning system. The early warning method comprises the steps that S1 the coal feeding amount is detected in real time, and the current coal feeding amount is obtained; S2 the difference value ofthe previous coal feeding amount before the current coal feeding amount exceeds the preset time is obtained; S3 an alarm is given when the difference value is greater than a preset value, wherein theearly warning system comprises a coal feeding amount real-time detection module, a data processing module and an alarm module. The coal feeding amount real-time detection module detects the coal feeding amount in real time and sends an obtained coal feeding amount signal to the data processing module. The data processing module obtains the difference value of the previous coal feeding amount before the current coal feeding amount exceeds the preset time and sends an early warning signal to the alarm module when the difference value is larger than the preset value. The alarm module gives an alarm when receiving the early warning signal. According to the early warning method and system, the problems of operation adjustment lag and the like of a desulfurization system are solved, excessive emission of sulfur dioxide is effectively avoided, and the operation economy is improved.

The invention discloses a high-concentration tetrahydrofuran organic waste gas treatment process and device, and belongs to the technical field of waste gas treatment. The device comprises a gas conveying device, an adsorption device, an LEL online monitoring device, a desorption device, a vacuum pump and a condensation recovery device, a nitrogen generator is arranged on the gas inlet pipeline; the adsorption device comprises at least two adsorption tanks which are arranged in parallel and have the same structure, and the adsorption material is a resin and activated carbon fiber composite layer; the LEL online monitoring device is connected with the gas conveying device, the adsorption device, the desorption device and the vacuum pump; the vacuum pump is connected with the adsorption tank; and the adsorption device and the desorption device are connected with the condensation recovery device. When the device is used for waste gas treatment, the LEL online monitoring device detects the concentration of waste gas in real time, the whole process is adjusted and controlled by the controller, and residual high-concentration waste gas in the valve switching process is rapidly adsorbed through activated carbon fibers. The whole treatment process system is in a low-oxygen state, the safety is improved, and the treatment efficiency and the solvent recovery rate are high.

The invention provides an on-line detection method and device for the sulfur content of automobile oil, and the method comprises the steps: firstly, controlling separation equipment to separate to-be-detected automobile oil into a plurality of pieces of prepared automobile oil, the sulfur components of the plurality of pieces of prepared automobile oil being different; then, the multiple working electrodes are controlled to test the corresponding prepared automobile oil, the prepared sulfur content is calculated according to the test result, the prepared sulfur content is the sulfur content of each prepared automobile oil, and the multiple working electrodes correspondingly test the prepared automobile oil with different sulfur components; and finally, determining the sulfur content of the to-be-detected automobile oil according to the plurality of prepared sulfur contents. A plurality of working electrodes ensure that the accuracy of sulfur content detection is high, the sulfur content of the automobile oil can be quickly detected on line, and the defect that the quality of the automobile oil cannot be monitored in real time by an existing off-line detection method is overcome; the problems that emission exceeds the standard, engine parts are corroded and the oil change period is shortened due to the fact that monitoring is not in time are solved.

The invention discloses a method for diagnosing whether regeneration of a diesel particle filter of a diesel vehicle is frequent or not. Scheduled work condition parameters and a scheduled recording period set in advance in the S10 and S20 and the maximum allowed frequency, pre-determined on the basis of the waste gas exhaust requirement of the diesel vehicle in the S30, of regeneration of the diesel particle filter within the recording period are stored in a diesel vehicle. The method comprises the steps that the completing frequency of regeneration of the diesel particle filter is recorded in the recording period; in the S40, the recorded completing frequency is compared with the maximum allowed frequency, and in the S52, if the recorded completing frequency is larger than the maximum allowed frequency, frequent generation happens to the diesel particle filter; and in the S 51, if the recorded completing frequency is not larger than the maximum allowed frequency, it is confirmed that the regeneration frequency of the diesel particle filter is normal, meanwhile, the recording period is reset, and the completing frequency of generation of the diesel particle filter is recorded again.

The invention provides a system for controlling dioxin emission in flue gas in real time and a working method of the system. The system comprises a pre-treating device, a switching part and at least two dioxin removing devices, wherein the pre-treating device is used for removing dust, and acidy and smelly gases in the flue gas; the switching part is used for selectively communicating the outlet of the pre-treating device with one of the at least two dioxin removing devices; each dioxin removing device comprises a reactor, a valve, a first detector, a second detector and a judging module, wherein the reactor is used for removing dioxin in the flue gas; the valve is arranged at the downstream of the reactor; the first detector and the second detector are respectively used for detecting concentration of a dioxin precursor in the flue gas at the upstream and the downstream of the reactor, and outputting the value to the judging module; and the judging module is used for judging that whether switching is needed or not according to the received concentration value, and transmitting the result to the switching part and the valve. The system disclosed by the invention has the advantages of detecting in real time, continuously treating, preventing standard-exceeding emission, and the like.

The multi-section AO enhanced denitrification sewage treatment system comprises a front-end anoxic section, a first aerobic section, a middle anoxic section and a second aerobic section which are sequentially arranged in the sewage flowing direction. Meanwhile, the invention further discloses an application method of the sewage treatment system based on multi-stage AO enhanced denitrification. Compared with the traditional AAO treatment process, the method has the advantages of 1) an anaerobic section being canceled, and adopting an anoxic-aerobic (AO) enhanced denitrification process; 2) adjusting the hydraulic retention time ratio of the anoxic zone to the aerobic zone, increasing the hydraulic retention time of the anoxic zone, and reducing the hydraulic retention time of the aerobic zone, and 3) adding a multi-point carbon source, through a series of measures, improving to a multi-stage AO enhanced denitrification process so as to enhance the denitrification capability and improvethe denitrification efficiency.