20results about How to "Curb emissions" patented technology

The invention belongs to the field of engine aftertreatment systems, and provides a composite two-stage SCR system, a control method, an aftertreatment system.The system comprises a first SCR, a first ASC, a DOC, a DPF, a second SCR, a second ASC, a calculation control unit, an electric heating device, a gas concentration detection unit and an exhaust temperature unit; and the control unit is used for determining a urea injection control strategy of the first SCR and the second SCR and a working strategy of the electric heating device according to the nitrogen oxide concentration and the nitrogen dioxide proportion detected by the gas concentration detection unit and the temperature obtained by the exhaust temperature unit, and respectively controlling the first SCR, the second SCR and the electric heating device to work according to the determined strategies. According to the invention, the cooperative control requirement of ultralow nitrogen oxide emission and nitrous oxide gas emission limitation of the diesel engine can be met.

The invention provides a hydrogen fuel engine tail gas aftertreatment method and device.The method comprises the steps that when the original exhaust temperature of a hydrogen fuel engine is larger than a first temperature threshold value, tail gas is controlled to enter a first pipeline to participate in aftertreatment, and the first pipeline is provided with a hydrogen-oxygen catalyst and an ammonia selective catalytic reduction device; the hydrogen-oxygen catalyst is located at the upstream of the ammonia selective catalytic reduction device; and when the original exhaust temperature of the hydrogen fuel engine is smaller than or equal to a second temperature threshold value, the tail gas is controlled to enter a second pipeline to participate in aftertreatment, the second temperature threshold value is smaller than or equal to the first temperature threshold value, and the second pipeline is provided with a hydrogen selective catalytic reduction device. According to the tail gas aftertreatment method and device, the tail gas aftertreatment mode is reasonably selected on the basis of the original exhaust temperature of the hydrogen fuel engine, and therefore emission of nitrogen oxide and hydrogen under the full working condition is effectively restrained.

This invention discloses a self-cleaning radiative cooling coating based on biomass carbon quantum dots, its preparation method, and its application. The coating comprises a polymer film-forming resin, carbon quantum dots, and hollow glass microspheres; wherein the mass ratio of the polymer film-forming resin to the filler is 1:(0.1-0.5), and the mass ratio of the hollow glass microspheres to the carbon quantum dots is 1:(0.05-0.2). This invention synergistically enhances solar reflectivity through the photoluminescence properties of carbon quantum dots and the scattering properties of hollow glass microspheres, while simultaneously utilizing the synergistic effect of fluorinated resin and modified hollow glass microspheres to endow the coating with superhydrophobic self-cleaning function. A single layer of this coating can achieve a solar reflectivity >92%, mid-infrared emissivity >94%, and contact angle >150°, possessing both efficient daytime radiative cooling and long-lasting self-cleaning performance. It is particularly suitable for passive heat dissipation of outdoor equipment such as new energy vehicle charging piles, and features simple process, environmental friendliness, and excellent performance.

Provided is a ventilation structure that suppresses discharge of oil from a ventilation chamber to the atmosphere. The ventilation structure is provided in a housing having a first housing member and a second housing member that form a housing chamber in a state in which the first housing member and the second housing member abut against each other. The ventilation structure is provided with: a ventilation chamber in which a first inner wall part, which is an inner wall part of the first case member, and a second inner wall part, which is an inner wall part of the second case member, are brought into contact with each other to form an enclosed hollow chamber, and in which a first communication part that communicates with the housing chamber and a second communication part that communicates with the atmosphere are provided; and a front chamber which is adjacent to the ventilation chamber between the housing chamber and the ventilation chamber, and which forms an enclosed empty chamber by abutting the first inner wall portion and the second inner wall portion.

The present invention belongs to the field of engine aftertreatment system, and provides a composite two-stage SCR system, control method, aftertreatment system and vehicle, wherein the system includes a first SCR, a first ASC, a DOC, a DPF, a second SCR, a second ASC, a calculation control unit, an electric heating device, a gas concentration detection unit and an exhaust temperature unit, and determines the urea injection control strategy of the first SCR and the second SCR and the working strategy of the electric heating device according to the nitrogen oxide concentration and nitrogen dioxide ratio detected by the gas concentration detection unit and the temperature obtained by the exhaust temperature unit, and controls the first SCR, the second SCR and the electric heating device to work respectively according to the determined strategy. The present invention can meet the coordinated control requirements of ultra-low nitrogen oxide emissions and nitrous oxide gas emission restrictions of diesel engines.

The invention discloses a method for preparing a carbon material by using waste melamine resin, aiming at the defects of environmental pollution caused by landfill of the waste melamine resin, difficulty in separation of degradation products and release of toxic gas by pyrolysis, and the method comprises the following steps: dispersing the waste melamine resin in water, adding an acid or alkali catalyst, and fully reacting in a closed reactor at 120-280 DEG C to obtain the carbon material. Separating to obtain a solid-liquid two-phase product; wherein the solid-phase product is a hydrothermal carbon material with photocatalytic performance; and drying the liquid phase part, and roasting at 300-900 DEG C to obtain the heteroatom-doped carbon material with the electro-catalytic property. The method is simple to operate, the product is easy to separate and pollution-free, and the product can be used as a catalyst for photocatalysis and electro-catalysis reaction.

The invention relates to the technical field of sewage treatment, and discloses a microbial electricity generation and energy storage integrated buried sewage treatment device which comprises an oil separation tank, a septic tank, an anaerobic and aerobic zone and a settling zone which are arranged in sequence, the anaerobic and aerobic zone comprises a plurality of reactors which are sequentially communicated, sewage sequentially passes through an anode chamber and a cathode chamber of each reactor, the cathode chamber of the reactor located at the upstream is communicated with the anode chamber of the reactor located at the downstream, an anode plate attached with microorganisms is arranged in the anode chamber, and a cathode plate attached with microorganisms is arranged in the cathode chamber; and the anode plate and the cathode plate are electrically connected with the current collection and energy storage module. Through the current formed by the potential difference between the anode plate and the cathode plate, a part of electrons can be directly led out to the current collection and energy storage module for generating electricity, so that more substrates are used for generating energy, the residual sludge amount and the yield are reduced, the environmental protection principle of reduction is met, the environmental friendliness of the sewage treatment device is improved, and the sewage treatment efficiency is improved. The device is suitable for being used close to residential areas.

This invention provides an operating method and a furnace for a heating furnace that uses ammonia as the combustion fuel and reduces emissions of nitrogen oxides and unburned ammonia. The operating method involves heating the material to be heated while transporting it from a loading section to a discharge section. The method includes: dividing the furnace into a loading area on the loading section side, a discharge area on the discharge section side, and a central area sandwiched between the loading area and the discharge area; performing burner heating in the loading area, the central area, and the discharge area using fuel gas containing ammonia; and discharging exhaust gas from a flue located near the loading section within the furnace. The burner heating in the discharge area has an average air ratio relative to the theoretical air volume of the fuel gas that is greater than 1.0 and less than 1.1; the burner heating in the central area has an average air ratio relative to the theoretical air volume of the fuel gas that is less than the average air ratio relative to the theoretical air volume of the fuel gas in the discharge area.

The invention provides a method, device and equipment for controlling oil injection and a computer readable storage medium. The method comprises the steps that operation parameters of a vehicle are obtained; the Miller degree in a target air cylinder of the Miller cycle engine at the current moment is determined; the Miller degree is used for representing the intensity of the Miller cycle in the target air cylinder; based on the Miller degree and the operation parameters of the vehicle, oil injection parameters of the target air cylinder are determined through a preset oil injection control model; the oil injection parameters are used for compensating the change of the thermodynamic state in the target air cylinder caused by the Miller cycle; and a target fuel injector corresponding to the target air cylinder is controlled to execute fuel injection according to the fuel injection parameters.

A negative electrode for a secondary battery according to an exemplary embodiment may include: a negative electrode current collector; a first negative electrode active material layer that is provided on at least one surface of the negative electrode current collector and contains a first negative electrode active material containing a first silicon composite oxide; and a second negative electrode active material layer that is provided on the first negative electrode active material layer and contains a second negative electrode active material containing a second silicon composite oxide. The first silicon composite oxide and the second silicon composite oxide may each include a metal, and the BET specific surface area of the first silicon composite oxide and the second silicon composite oxide may be 2.0-6.5 m2 / g. Therefore, the charging / discharging capacity of the negative electrode can be increased while the stability of the negative electrode can be improved.

The application discloses a kind of potato green efficient fertilization methods, belong to agricultural planting technical field.The method includes: in sowing or land preparation, straw is promoted to rot microbial agent and antagonistic functional bacterium agent are mixed together with base fertilizer and are applied together;Before potato flowering period, antagonistic functional bacterium agent is mixed together with topdressing and is applied together.The straw is promoted to rot microbial agent and includes trichoderma and bacillus, and the antagonistic functional bacterium agent includes trichoderma, paenibacillus and streptomycete.The application can effectively improve potato yield and fertilizer utilization rate by the synergistic application of functional microorganism and fertilizer, while significantly reducing carbon footprint and nitrogen footprint in production process, solve the problem that high yield and environmental protection are difficult to consider in prior art, provide a popularized technical scheme for potato green efficient production.

Provided is a novel technical means capable of immobilizing CO2 in which a silicate mineral containing Mg, Ca and the like is reacted with CO2 and immobilized in the form of a carbonate in a manner that facilitates process management and has high treatment efficiency. A method for immobilizing carbon dioxide, said method comprising: an amorphous treatment (St1) in which an alkaline earth metal-containing ore is subjected to a mechanochemical treatment in which mechanical stress is applied, and an alkaline earth metal-containing mineral from among alkaline earth metals is amorphous; and a carbon dioxide immobilization treatment (St2) in which the alkaline earth metal-containing ore subjected to the amorphous treatment (St1) is placed in a solution to elute magnesium in the solution, and the magnesium elute in the solution is reacted with carbon dioxide, thereby immobilizing the carbon dioxide in the form of an alkaline earth metal carbonate.

The invention relates to the technical field of secondary aluminum processing equipment, and discloses an ash frying machine with a high-strength slag frying pan, and the ash frying machine comprises the high-strength slag frying pan, a gas collection sealing plate, a smoke pipe, a stirring module and a stirring speed self-adaptive regulation and control system. The stirring speed self-adaptive regulation and control system is used for regulating the stirring speed of the stirring main shaft in real time based on the instantaneous power and the torque change rate of the stirring main shaft, the temperature gradient, the standard deviation and the temperature rise rate in the pot, the flue gas oxygen and dust concentration, the accumulated specific energy consumption, the molten aluminum outflow rate and the flue gas carbon monoxide concentration; respectively calculating to obtain a force-resistance interaction coefficient, a thermal dynamic coefficient, a comprehensive working condition quality factor and a progress coefficient, and calculating a target stirring speed according to the parameters for adjustment. According to the invention, intelligent self-adaptive adjustment of the stirring speed is realized, and the treatment efficiency and the operation stability are obviously improved.

A positive electrode active material precursor for a lithium secondary battery according to an embodiment of the present invention may comprise: a first positive electrode active material precursor particle comprising a core part and a shell part, the core part and the shell part comprising a transition metal containing nickel; and a second positive electrode active material precursor particle containing a transition metal containing nickel. In the transition metal of the second positive electrode active material precursor particles, the molar fraction of nickel can be kept constant throughout the second positive electrode active material precursor particles. The average particle diameter (D50) of the core parts of the first positive electrode active material precursor particles may be larger than the average particle diameter (D50) of the second positive electrode active material precursor particles.

The invention provides a hydrogen fuel engine tail gas after-treatment system and method.The system comprises a tail gas pipeline, a first parallel pipeline, a second parallel pipeline and a gas outlet main pipeline, and a gas inlet of the gas inlet main pipeline communicates with a gas outlet of a hydrogen fuel engine; the temperature sensor is arranged on the air inlet main pipeline; an air inlet of the three-way valve is communicated with an air outlet of the air inlet main pipeline, a first air outlet of the three-way valve is communicated with an air inlet of the first parallel pipeline, and a second air outlet of the three-way valve is communicated with an air inlet of the second parallel pipeline; the hydrogen-oxygen catalyst is arranged on the first parallel pipeline; the ammonia selective catalytic reduction device is arranged on the first parallel pipeline and is positioned at the downstream of the hydrogen-oxygen catalyst; and the hydrogen selective catalytic reduction device is arranged on the second parallel pipeline. According to the tail gas aftertreatment method and device, the tail gas aftertreatment mode is reasonably selected on the basis of the original exhaust temperature of the hydrogen fuel engine, and therefore emission of nitrogen oxide and hydrogen under the full working condition is effectively restrained.

The invention discloses a cooling circulating water system agent adding device which comprises a cooling water pond and an air compressor connected with the cooling water pond through a circulating water main pipeline, the side wall face of the circulating water main pipeline is communicated with a recycled water inlet pipeline, and the recycled water inlet pipeline is connected with an agent adding device through an agent inlet pipeline branched from the surface of the recycled water inlet pipeline. The medicament adding device comprises a corrosion and scale inhibitor adding mechanism, a sterilization and algicide adding mechanism and a defoaming agent adding mechanism which are arranged side by side, and control loops of the corrosion and scale inhibitor adding mechanism, the sterilization and algicide adding mechanism and the defoaming agent adding mechanism are electrically connected with a time control switch arranged in the distribution box; and the operation time period of one medicament adding device can be independently preset through the time control switch. The device is matched with a cooling water system taking softened water and regenerated reclaimed water as water replenishing sources, and has the characteristics of reasonable structural design, accurate agent feeding, high automatic feeding degree and the like.

The invention relates to the technical field of solid waste resource recycling, and discloses a process for treating electrolytic aluminum waste residues through a staged roasting method.The step-by-step roasting method is adopted, magnesium hydroxide is used in the first step, fluorine can be effectively fixed, emission of harmful fluorine can be inhibited, the structure of electrolytic aluminum can be destroyed, carbon powder in the electrolytic aluminum waste residues can be removed, and the waste residues can be recycled; more lithium is released; in the second step, lithium hydroxide is used for roasting at low temperature, so that the sintering temperature and the energy consumption are reduced, the waste residues can be completely converted into LiF and other oxides by adding the lithium hydroxide, lithium and aluminum can be separated by using water leaching, and the lithium yield is prevented from being influenced due to the fact that lithium and aluminum are in the same system; no hydrogen fluoride is generated in the whole technological process, corrosion to equipment is small, the technological process is simple, a large amount of equipment does not need to be used, and the method is suitable for industrial production.

The invention provides an internal combustion engine control device and an internal combustion engine control method. An internal combustion engine control device according to one embodiment of the present invention controls an internal combustion engine provided with an oil pump for discharging a predetermined flow rate of lubricating oil, and an oil injection system for injecting the lubricating oil discharged from the oil pump to a portion to which a piston is supplied, the internal combustion engine control device being provided with a control unit, when the temperature of the piston crown surface is lower than a lower limit temperature of a temperature range in which the amount of deposits deposited on the piston crown surface is less than a threshold value, control is performed such that the injection of the lubricating oil from the oil injection system is stopped or the flow rate of the lubricating oil is reduced compared to the flow rate of the previous cycle.

An electrolyte for a lithium secondary battery and a lithium secondary battery are provided. The electrolyte for the lithium secondary battery comprises a butyrolactone compound containing at least one alkenyl group and a lithium salt. The lithium secondary battery includes: an electrode assembly containing a positive electrode and a negative electrode; and the electrolyte for the lithium secondary battery.

A positive electrode active material for a lithium secondary battery according to an embodiment of the present disclosure includes a lithium transition metal oxide containing nickel (Ni), cobalt (Co), manganese (Mn), strontium (Sr), and sulfur (S). The mole fraction of nickel in the total mole number of nickel, cobalt, and manganese in the lithium transition metal oxide is 0.8 or more. The molar ratio of cobalt to manganese in the lithium transition metal oxide is 0.9 to 1.5. The molar ratio of strontium (Sr) to sulfur (S) in the lithium transition metal oxide is greater than 0 and 4 or less. Provided is a lithium secondary battery including a positive electrode active material for a lithium secondary battery, providing improved life stability and high capacity / power.