10results about How to "Reduce emission intensity" patented technology

This invention discloses a method for coordinated optimization and low-carbon operation of a boiler-thermal power system in a thermal power plant, relating to the field of thermal power generation technology. The method includes: acquiring real-time fuel quality data, screening, drying, proportioning, and grinding the fuel to prepare qualified pulverized coal; dynamically adjusting the air-coal ratio based on unit load and combustion status, controlling furnace operating conditions and linking turbine parameters to maintain thermal system balance; collecting real-time equipment operating data, assessing remaining lifespan through a short-term memory network, and performing maintenance or parameter correction accordingly; recovering boiler and steam waste heat for plant heating, and coordinating the biomass co-firing ratio and pollutant capture parameters to achieve low-carbon emissions. This invention reduces coal consumption and heat loss by constructing a coordinated control system across the entire fuel-combustion-power chain; and achieves ultra-low emissions and a significant reduction in carbon emission intensity by combining equipment health management and waste heat low-carbon coupling technology.

The application provides a method and system for preparing low-carbon cement by using coal gasification ash in a graded manner, and the method comprises the following steps: dividing the coal gasification ash into carbon-rich ash, medium-carbon ash and carbon-poor ash according to the carbon content; feeding the carbon-rich ash and raw coal into a coal powder preparation workshop to prepare a first mixture as a clinker calcination fuel; feeding the medium-carbon ash into a raw material preparation workshop after metering to be ground and dried together with other raw material components; preparing clinker by decomposing and calcining the second mixture after mixing uniformly and cooling; feeding the mixture of the clinker and other cement components and the carbon-poor ash into a cement preparation workshop to prepare finished cement. The carbon content of the coal gasification ash is divided in a graded manner to obtain coal gasification ash materials with different characteristics, and the cement production process characteristics are combined to be used in three process sections of raw material grinding, clinker calcination and cement grinding, so that the coal gasification ash is used in a large amount and in a large scale in the building material resources, and the carbon emission in the cement clinker production process is reduced.

The invention relates to the technical field of building materials, and particularly discloses a light carbon sequestration type cement product and a preparation method thereof.The preparation method of the light carbon sequestration type cement product comprises the following steps that carbide slag and iron tailings are pretreated; mixing the pretreated carbide slag, iron tailings, cement clinker and calcined coal gangue powder at 140-240 rpm for 3-5 min to obtain a mixture; adding water and an additive into the mixture, injecting carbon dioxide foam at the same time, monitoring and controlling the pH value of the mixture in a range of 11-12, stirring and mixing, adding a calcium carbonate crystal form regulating agent, and continuously and uniformly mixing to obtain a mixture; and pouring the mixture into a mold for molding and curing. The light carbon sequestration type cement product can be used in the field of light high-strength building materials such as fabricated building components, partition boards and heat preservation building blocks, and has the advantages of being low in carbon, environmentally friendly and high in strength.

The invention relates to the technical field of intelligent traffic and health monitoring, and discloses a man-vehicle integrated dual-health management system and an operation method. In order to solve the problems that in the prior art, vehicle and driver data are independently processed, carbon emission accounting is not dynamic, and health early warning lags behind, the system comprises a multi-source data acquisition device, a data fusion processing system, a collaborative analysis engine and a two-way intervention execution module. Vehicle operation parameters and driver physiological indexes are synchronously collected through a multi-source sensor, fused through a space-time alignment algorithm and stored through a block chain technology; a dynamic carbon accounting model and a health risk assessment model are built in the collaborative analysis engine, and an analysis result is generated based on a driving behavior-carbon emission-health state mapping relation; and the two-way intervention execution module synchronously adjusts a vehicle power system and triggers personnel physiological feedback according to a grading early warning strategy. Closed-loop optimization of carbon emission reduction and health protection is achieved, the carbon accounting precision reaches 95.8%, the traffic accident rate is reduced by 41.2%, and the method is suitable for various motor vehicle driving scenes.

This invention provides a method and system for hydrothermal-roasting coupled cascade separation and full-component resource recovery of vanadium-phosphorus iron, belonging to the field of resource utilization technology. The invention includes raw material pretreatment, hydrothermal pre-dephosphorization, low-temperature composite salt roasting for vanadium extraction, water leaching and vanadium recovery, and molten reduction alloying. This invention pioneers a coupling mechanism between "hydrothermal pre-dephosphorization" and "low-temperature composite salt roasting for vanadium extraction," and connects it with "molten reduction alloying," forming an inseparable cascade separation and full-scale recovery closed-loop system. Under mild conditions, it achieves a phosphorus removal rate exceeding 92% and a vanadium conversion rate exceeding 99%, reducing energy consumption by approximately 30% and solid waste emissions by more than 85% compared to traditional processes. It simultaneously produces three high-value products: high-purity vanadium pentoxide, agricultural phosphate, and stainless steel master alloy, possessing multiple advantages such as high resource utilization, clean and low-carbon operation, and significant economic benefits.

The invention discloses an energy-saving and efficiency-improving urea production system. The system comprises a synthesis unit, a hydrolysis analysis unit, an evaporation granulation unit and a circulating absorption unit, the method has the advantages that through full-tower operation transformation of the synthetic tower and additional arrangement of the tower plates, idle space in the tower is fully utilized, the material reaction time is prolonged, the urea synthesis conversion rate is remarkably improved, the unreacted material amount is reduced, and the circulating load is reduced, so that the raw material feeding amount can be increased, the capacity of the device is greatly improved, and the problem that the capacity of a traditional process is limited is solved; and sufficient fertilizer guarantee is provided for grain production. The waste heat of 98 DEG C hydrolysis water purification of the hydrolysis system is used for preheating liquid ammonia, energy waste caused by the fact that waste heat is cooled through circulating water in a traditional process is avoided, consumption of extra energy for liquid ammonia preheating is reduced, gradient utilization of heat is achieved, steam consumption and circulating water consumption of the device are remarkably reduced, and the energy-saving effect is outstanding.

This invention discloses a slow-mixed fertilizer suitable for increasing yield and reducing emissions in machine-transplanted early rice in low-latitude regions. It consists of the following parts by weight: 4-6 parts sulfur-coated urea and 4-6 parts 2-month resin-coated urea. The invention also discloses the application of this slow-mixed fertilizer in early rice production, with fertilization carried out simultaneously with rice transplanting. The slow-mixed fertilizer is applied directly to the base of the seedlings at a depth of 5 cm and 3-5 cm in the soil. This invention's slow-mixed fertilizer can increase yield, nitrogen fertilizer use efficiency, and reduce greenhouse gas emissions. Compared with conventional high-yield, multi-stage fertilization, the application of this invention's slow-mixed fertilizer increases rice yield by 7.5%-7.8%, increases nitrogen fertilizer use efficiency by 30.5%-44.5%, reduces global warming potential by 12.8%-27.5%, and reduces greenhouse gas emission intensity by 19.3%-32.7%.

This invention relates to the field of microgrid technology, specifically providing a control method, device, and medium for a DC microgrid based on a dynamic carbon factor. The method includes: acquiring the current state information of the DC microgrid system; inputting the state information into an improved SAC controller capable of deep reinforcement learning; the improved SAC controller comprising a policy network, two evaluation networks, a dual-mode hybrid control module, an adaptive weighted reward module, and a hierarchical experience pool module; outputting the operating condition determination result through the dual-mode hybrid control module; adaptively outputting the droop coefficient of each node in the DC microgrid based on the operating condition determination result; calculating the control voltage and power allocation of each node in the DC microgrid at the next moment, and controlling the DC microgrid to allocate power according to the dynamic carbon factor. This addresses the problems of related technologies where DC microgrids only consider power balance, resulting in high carbon emissions and poor control accuracy.

This invention belongs to the field of iron and steel metallurgy and comprehensive energy utilization technology, specifically disclosing a method and system for upgrading low-carbon coal gas in integrated iron and steel production based on carbon dioxide recycling. This invention captures and purifies high-purity CO2 from blast furnace gas, completely replacing nitrogen used for converter slag splashing and bottom blowing. It utilizes the sensible heat of the high-temperature flue gas in the converter to drive a reduction reaction between pulverized coal and CO2, generating high-concentration CO, thus upgrading and improving the efficiency of converter gas. The upgraded gas is then recovered for power generation, industrial furnace fuel, or chemical raw materials. The CO2 produced during combustion is captured and recycled again, forming a closed-loop carbon cycle within the plant: capture-conversion-utilization-recapture. This invention can increase the CO volume fraction of converter gas to over 85%, increase the calorific value by 20%–50%, and reduce carbon emission intensity per ton of steel by 8%–10%, achieving carbon emission reduction, energy saving and cost reduction, and energy value-added effects. The process is compact, adaptable to existing production lines, and has strong industrial feasibility.

The application discloses a mutant of expansin protein from rumen anaerobic fungi, a coding gene and application thereof, and belongs to the technical field of biological genetic engineering. The wild-type expansin protein PFSWO2_1 is subjected to site-directed mutation, and mutants with higher expression, better thermal stability and stronger synergistic effect with cellulase, namely the mutants PFSWO2_1-N1, PFSWO2_1-N2 and PFSWO2_1-N3, are obtained. The mutants are successfully expressed in Pichia pastoris, the hydrogen bond network between cellulose molecules is destroyed, the mutants can significantly enhance the enzymolysis efficiency of cellulase on lignocellulose, the mutants can not only improve the utilization rate of agricultural wastes such as straws in feed, but also can inhibit the generation of methane by regulating the fermentation parameters and microbial community structure in the rumen in vitro fermentation process, and the mutants have important application value in reducing the greenhouse gas emission of the animal husbandry.