9 results about "Chemical equation" patented technology

The invention relates to the technical field of biological fermentation, in particular to a method for identifying a dominant metabolic pathway of VFA degradation in AD based on an energy efficiency ratio. The method comprises the following steps: determining boundary conditions of a VFA metabolic pathway; and acquiring data in the operation process of the AD reactor. According to the method for identifying the dominant metabolic pathway of VFA degradation in AD based on the energy efficiency ratio, process parameters such as gas components, VFA concentration, pH value, bicarbonate ion concentration and the like in AD (anaerobic digestion) are regularly detected, a thermodynamic function in a reaction system is corrected according to a metabolic chemical equation of VFA in combination with phase state, temperature and substrate and product concentration factors, and the dominant metabolic pathway of VFA degradation in AD is identified. Calculating a delta G value corresponding to each metabolic pathway; the electron transfer mole number (Ne) involved in each metabolic reaction is calculated, and delta G is normalized into a form (delta G / Ne) of electron transfer per mole; preliminary identification of the dominant metabolic pathway can be realized through the physicochemical parameters easy to obtain in the AD system, and the method has the remarkable advantages of high efficiency, convenience and high universality.

The invention discloses a method and system for estimating the concentration of radioactive iodine species in a containment after an accident, and the method comprises the steps: inputting the content of gaseous iodine in the atmosphere of the containment, and calculating the acid content in the wall surface of the containment and the liquid phase of a pit; on the basis of the content of acid in the pit liquid phase and the content of a medicine added into the pit in advance, the pH value in the pit liquid phase is calculated through a pH model; determining the content of iodine which enters the liquid phase of the pit and does not participate in the chemical reaction of the liquid phase; on the basis of the content and the pH value of iodine which can be subjected to chemical reaction in the pool, combining an iodine water chemical equation, and calculating through a liquid phase chemical reaction model to obtain the concentrations of different iodine species in a liquid phase; calculating the mass transfer amount of gaseous iodine in the gas phase between the containment atmosphere and the pit water based on a pool mass transfer model; the content of gaseous iodine in the containment atmosphere is calculated through a gaseous iodine radiolysis and ionization model; determining the content of iodine deposited on the dry wall surface of the containment based on a gaseous iodine deposition model; and finally outputting the concentration of each iodine species in the gas liquid.

The invention belongs to the technical field, and particularly relates to a nitriding furnace control system and method based on gas flow integral differential information, and the system comprises a hardware layer, a data layer, and a control layer. The hardware layer comprises a furnace body system, a sensor group and an execution mechanism and is used for detecting signals in the furnace body and transmitting the signal data to the data layer; and the data layer comprises a data acquisition system and an analysis system. According to the method, the instantaneous volume flow is monitored, and a'flow-reaction process' quantitative relation is established; according to integral analysis on the total gas consumption amount according to actual production requirements, the material reaction progress is reversely deduced through a chemical equation, the reaction progress is accurately controlled, and theoretical support and data support are provided for manual refined reaction control; a data model is established, an integral information graph and a differential information graph of the gas flow are recorded in real time, and the process is conveniently modified after production is finished.

The invention relates to the technical field of chemical analysis and detection, and discloses a method for detecting the content of calcium hydroxide in calcium-based desulfurized fly ash. The method comprises the following steps: S1, drying and grinding a calcium-based desulfurization ash sample, and sieving with a 200-mesh sieve to obtain a pretreated sample; s2, the pretreated sample with the mass being W0 is placed in a thermogravimetric analyzer and heated to T at the heating rate of 5-15 DEG C / min in the nitrogen atmosphere, W0 is larger than or equal to 30 mg, and T is larger than or equal to 550 DEG C; s3, the weight loss ratio delta W1 in the interval of 400-550 DEG C is obtained, and the content W1 of calcium hydroxide in the calcium-based desulfurized fly ash is calculated according to a formula. According to the method, the calcium-based desulfurized fly ash is heated to 550 DEG C by utilizing a thermogravimetric analysis method, the weight loss at the interval of 400-550 DEG C is the weight of water lost when calcium hydroxide is decomposed into calcium oxide and water, and the content of the calcium hydroxide can be calculated according to a chemical equation for decomposing the calcium hydroxide and the weight of the lost water. The method is simple to operate and high in accuracy.

The application discloses an optimization method for improving P2G heat utilization rate and heat coupling of carbon capture equipment, and comprises the following steps: deducing reaction heat of an electric-to-gas process according to a chemical reaction equation, and optimizing and improving a traditional P2G model; delivering the reaction heat of the P2G deduced in step 1 to a carbon capture equipment, and using the heat to supply the carbon capture, so as to strengthen heat coupling of the P2G and the carbon capture equipment; applying the IP2G model and the carbon capture device to a comprehensive energy system; taking annual operation cost saving rate, primary energy saving amount and carbon dioxide emission reduction as objective functions, taking device configuration of the comprehensive energy system as variables, setting constraint conditions, and adopting a meerkat algorithm as a solving algorithm to perform optimization configuration solving. The application deduces the heat by studying a chemical equation in a reaction process of the P2G, and the application is applied to the comprehensive energy system, so that the energy storage cost performance of the P2G equipment can be improved, the primary energy consumption amount can be reduced, and the annual operation cost can be effectively reduced.

The Handheld Chemical Equation Balancing Device is a utility model designed to address students' difficulty in balancing chemical equations; a key competency aligned with the Law of Conservation of Mass. Challenges often include assigning correct coefficients, identifying relationships between reactants and products, and applying multiplicative reasoning. The device is a foldable apparatus with two hinged divisions, each containing a writing panel and manipulatives. It uses colorcoded movable beads to represent atoms and rotatable hexagonal nuts with numerical multipliers to assist in determining coefficients. The method of use involves unfolding the device, writing the equation, representing elements with beads, identifying imbalances, and adjusting coefficients through nut rotation and bead repositioning until both sides are equal. Compact and non-electronic, the device promotes active, visual, and kinesthetic learning.

The invention provides a high-voltage cable arc fault risk assessment method and device constructed based on a dynamic fire source and a cable pyrolysis combustion model, and the method comprises the steps: firstly constructing an electric characteristic calculation model of an overhead line-cable mixed line arc fault; acquiring voltage and current characteristic data of the cable arc fault under different relay protection strategies; secondly, constructing a cable arc fault model, obtaining a change relation of arc temperature along with time based on characteristic data simulation, and constructing a time-varying arc fire source; then testing thermal and chemical parameters of the cable material sample to obtain material test data; building a pyrolysis model of the cable material based on material test data, and balancing a combustion chemical equation; integrating the obtained model and data, and constructing a fault risk assessment model; and finally, calculating characteristic parameters representing the combustion intensity of the cable by using the model, and judging the risk level of the cable ignited by the electric arc. According to the invention, the electric arc fault ignition risk of the cable can be accurately determined.

The present invention provides a method for calculating the interfacial Gibbs free energy in a microinterface system, comprising the following steps: (A) establishing a Gibbs free energy equation for gas dissolution in a solution; (B) establishing a chemical equation for gas dissolution in a solution; (C) obtaining the Henry coefficient based on the equivalence principle between the equilibrium constant and the Henry coefficient; and (D) establishing a relationship between the interfacial Gibbs free energy and the thickness of the mass transfer boundary layer in the microinterface system. The calculation method of the present invention is dedicated to exploring interfacial effects and establishing a related control model. By fitting experimental data, a model of interfacial Gibbs free energy and mass transfer membrane thickness based on different operating conditions and liquid properties is established. The model provides a quantitative contribution of interface and size effects to optimize the design and operation of microinterface enhanced reactors.