23202results about "Gas treatment" patented technology

The invention relates to the technical field of thermal power plant flue gas denitration, in particular to a thermal power plant APC advanced process control system and a denitration optimization method.The system comprises a data acquisition module for acquiring boiler combustion parameters, flue gas emission data and the operation state of a denitration system in real time; the multivariable predictive control module is used for optimizing the combustion efficiency and the NOx generation amount based on a dynamic matrix control algorithm; the denitration optimization decision module is used for dynamically adjusting the ammonia spraying amount through an ammonia escape feedback model; the intelligent coordination module integrates a unit load instruction and an environmental protection constraint condition and is used for cooperative control of combustion-denitration; according to the system, boiler combustion parameters, flue gas emission data and the operation state of the denitration system are obtained in real time through the data acquisition module, a dynamic matrix control algorithm of the multivariable prediction control module is combined, the NOx generation trend can be predicted in advance, the combustion efficiency can be optimized, and therefore the problem that adjustment is lagged when loads fluctuate in traditional PID control is effectively solved.

A shoe care device includes an inner cabinet that has an accommodation space configured to accommodate shoes therein, an inlet defined at a first portion of the accommodation space and configured to supply air to the accommodation space, and an outlet defined at a second portion of the accommodation space and configured to suction air from the accommodation space. The shoe care device further includes a connection path configured to circulate air between the inlet and the outlet, a blowing fan disposed at the connection path and configured to blow air from the outlet toward the inlet, a dehumidifying material disposed at the connection path and configured to dehumidify the air blown by the blowing fan, a heater configured to heat the dehumidifying material, and a regeneration path configured to guide, to a location other than the inlet, the air having passed through the dehumidifying material heated by the heater.

A material removal system includes a collection conduit having a distal end that is positionable adjacent particulate material. A primary particle separator system connected to the collection conduit separates quantities of particulate material entrained in an air stream. A secondary particle separator system connected to an outlet of the primary particle separator system separates additional quantities of particulate material entrained in an air stream exiting the primary particle separator system. An air pump connected to an outlet of the secondary particle separator system creates an airflow through the collection conduit and the primary and secondary particle separator systems. A conveyor system operatively associated with material discharge ports of the primary and secondary particle separator systems collects separated particulate material from the material discharge ports of the primary and secondary particle separator systems and transports the separated particulate material to a material discharge end of the conveyor system.

Described are storage and dispensing systems and related methods, for the storage and selective dispensing germane a reagent gas from a vessel in which the reagent gas is held in sorptive relationship to a solid adsorbent medium at an interior of a storage vessel and wherein the methods and dispensing systems provide dispensing of the reagent gas from the storage vessel with a reduced level of atmospheric impurities contained in the dispensed reagent gas.

Disclosed herein are methods and systems for producing a liquefied methane product from a methane- and carbon dioxide-containing feed stream, in which a plurality of membrane stages comprising gas separation membranes that are more permeable to carbon dioxide than methane are used to remove carbon dioxide from the feed and form a retentate stream that is enriched in methane, said retentate stream being then cooled and liquefied to provide the liquefied methane product. In particular, the disclosed methods and systems may be used for producing liquefied biomethane from a biogas feed.

A system for capturing carbon dioxide from flue gas produced by a coke oven includes a coke oven system and a capture system. The coke oven is configured to process coal to produce coke and a flue gas comprising carbon dioxide. The coke oven includes an induced draft fan positioned downstream of the coke oven. The induced draft fan is configured to provide a vacuum to the coke oven and move the flue gas away from the coke oven. The coke oven system also includes a stack open to atmosphere and downstream of the induced draft fan. The capture system is fluidically coupled to the coke oven system at a point between the coke oven and the stack. The capture system is configured to remove carbon dioxide from the flue gas.

Described herein are sorbents functionalized with polyamines having oxygen-containing units selected from carbonyl units, hydroxyl units, and combinations thereof, methods of making same, and methods of using same.

A pair of waveform disks for use in a disk-pack turbine used, for example, in systems and methods in at least one embodiment for separating fluids including liquids and gases into subcomponents by passing the fluid into an expansion chamber and then through at least a portion of a waveform pattern present between at least two disks. The disks having waveform patterns on at least one side.

A disk-pack turbine for use, for example, in systems and methods in at least one embodiment for separating fluids including liquids and gases into subcomponents by passing the fluid through a fluid intake chamber into an expansion chamber and then through at least a portion of a waveform pattern present between at least two rotors and / or disks. The rotors and / or disks having waveform patterns on at least one side.

The invention relates to the technical field of industrial flue gas purification, and discloses a flue gas denitration pollution reduction and carbon reduction method and system based on model prediction control. The method comprises the following steps: collecting flue gas data through a sensor to obtain a flue gas distribution state; the state is processed through a preset model, and a nitrogen oxide concentration predicted value is determined; judging a regulation and control demand based on the predicted value and generating an adjustment coefficient sequence; calculating an opening value of an ammonia spraying distributor by adopting a particle swarm optimization algorithm, and determining ammonia spraying amount distribution; a control instruction is sent according to ammonia spraying amount distribution, and a temperature uniformity index is evaluated based on temperature feedback data; adjusting optimization algorithm parameters according to the indexes, and generating an optimized ammonia spraying strategy; updating the predicted value and determining the stable range of the denitration efficiency; verifying the ammonia escape concentration in the stable range to obtain a system performance index; and forming a continuous regulation and control sequence according to cyclic feedback of the indexes. According to the invention, accurate dynamic regulation and control of ammonia spraying amount are realized, denitration efficiency and system stability are effectively improved, and the risk of ammonia escape is significantly reduced.

The invention discloses a big data prediction model intelligent ammonia spraying control method and system suitable for kiln flue gas denitration. According to the ammonia spraying control method, historical and real-time data of multiple parameters such as the fuel gas flow of the glass kiln are collected firstly, the NOx amount is predicted through modeling of the LSTM-GRU hybrid neural network, the ammonia spraying amount is calculated through self-adaptive control, and the accuracy is ensured through two-stage correction. And the calculated ammonia spraying amount is transmitted to a production master control system to adjust an ammonia supply valve, and automatic alarm and manual control are switched in case of failure. The system comprises a data acquisition module, an intelligent prediction module, a self-adaptive control module and the like, and further comprises a dynamic catalytic reaction simulation test platform for optimization. According to the invention, intelligent automatic control of the big data model is realized, the ammonia spraying amount is accurately adjusted, the denitration efficiency and the ammonia utilization rate are improved, the operation cost is reduced, and the system reliability and stability are enhanced.

Device for dehumidifying a closed casing.The device for dehumidifying comprises a box comprising an inlet communicating with the interior of the closed casing and an outlet, a heating module able to be controlled to generate heat, a desiccant configured to adsorb moisture when it is not heated by the heating module and to return adsorbed moisture by desorption when it is heated by the heating module, a mobile plug able to be moved to alternately open and close the inlet and the outlet, a bias spring configured to move the mobile plug when the heating module does not heat the desiccant and a shape memory alloy spring configured to move the mobile plug when the heating module heats the desiccant, said shape memory alloy spring being able to be heated by the heating module at the same time as the desiccant. The device for dehumidifying is suited for dehumidifying any type of closed casing, it is cost efficient both in design and in power consumption, and it is easy to implement thanks to its small size and its simple design.

The invention provides a flexible preparation system and method for sustainable aviation fuel, and the system comprises a green power supply module which is used for outputting fluctuating green electric energy; the process execution device is connected with the green power supply module and comprises five process modules, namely an air carbon capture module, a co-electrolysis module, a Fischer-Tropsch synthesis module, a hydrogen production module and a hydrogenation refining module; the data acquisition module is used for acquiring the temperature, the pressure, the liquid level, the raw material input flow and / or the product output flow of each process module in the process execution device; and the decision control module is used for predicting the future power supply condition of the green electricity based on the historical weather data of the green electricity location, adjusting the distribution of the power in each process module according to the future power supply condition, and adjusting the temperature, pressure and / or raw material input flow in each process module. According to the invention, the cost, the reliability, the operation and maintenance performance, the product quality and the green power utilization rate can be substantially improved at the same time, and the flexible and stable operation of the system under the green power condition is realized.

A gas-liquid contactor for capturing carbon dioxide (CO2) from atmospheric air includes an inlet; an outlet; a gas-sorbent interface disposed between the inlet and the outlet; a liquid distribution system configured to flow a CO2 capture solution along the gas-sorbent interface; a fan configured to flow the atmospheric air along a flow path from: the inlet, along the gas-sorbent interface, and to the outlet, to contact the atmospheric air with the CO2 capture solution and absorb CO2 from the atmospheric air into the CO2 capture solution to form a CO2-lean gas stream; and an electrostatic drift eliminator within the flow path downstream of the gas-sorbent interface and upstream of the outlet. The CO2-lean gas stream includes aerosols of the CO2 capture solution. The electrostatic drift eliminator is configured to ionize at least some of the aerosols of the CO2 capture solution to form ionized aerosols and collect the ionized aerosols.

The invention provides a heteroatom-doped porous carbon material for carbon dioxide adsorption as well as a preparation method and application thereof. The preparation method comprises the following steps: S1, drying and crushing waste biomass to obtain raw material powder; s2, mixing the raw material powder with an activating agent, and fully grinding to obtain a mixture of the raw material powder and the activating agent powder; s3, dissolving one or more heteroatom sources in hot deionized water to obtain a hot solution, pouring the mixture of the raw materials and the activator powder in the step S2 into the hot solution, and heating and stirring until water is evaporated; s4, performing high-temperature carbonization on the mixture finally obtained in the step S3 in an anoxic environment; and S5, cleaning and drying the product in the step S4 to obtain the heteroatom-doped porous carbon material. The heteroatom-doped porous carbon material disclosed by the invention has a highly developed pore structure, and the porous carbon prepared by taking the waste biomass as a precursor is used as a carbon dioxide adsorbent, so that high-value utilization of waste biomass resources is realized.

The invention discloses a coal-fired unit SCR denitration system ammonia injection prediction control method based on data driving, which is used for realizing better SCR denitration system ammonia injection control based on a data driving model in combination with an implicit generalized prediction control algorithm. The SCR inlet NOx concentration and the flue gas temperature serve as feedforward of an ammonia spraying amount instruction, the initial control instruction increment of the ammonia spraying amount is calculated through the SCR outlet NOx concentration, the SCR outlet NOx concentration set value and the ammonia spraying amount instruction at the previous moment through an implicit generalized predictive control algorithm, and the final ammonia spraying amount instruction is obtained through summation and amplitude limiting of the last three instructions. Wherein the feedforward instruction of the NOx concentration of the SCR inlet is obtained by a BP neural network prediction model, and the feedforward instruction of the SCR inlet is obtained by a long-short term memory network prediction model fused with an attention mechanism. According to the method, the problem that the concentration of NOx at an SCR outlet fluctuates severely in the frequent load changing process can be effectively solved, meanwhile, transient overshoot of NOx in tail flue gas of a coal-fired unit is restrained, and the SCR denitration control effect is improved.

The present disclosure provides a carbon dioxide absorption composition, which includes a solution of an amino compound in a solvent comprising water and a glycol, as well as a method of using such composition to capture CO2. The present composition can be particularly advantageous for indoor use, with additional benefit for managing total volatile organic compounds and humidity to enhance overall indoor air quality.

A direct air capture (DAC) system for capturing carbon dioxide (CO2) from a dilute gas source includes a gas-liquid contactor subsystem and a wash water regeneration subsystem. The gas-liquid contactor subsystem includes a capture section, a wash section, and at least one fan to produce a CO2-rich capture solution in the capture section and a used wash water stream in the wash section. The wash water regeneration subsystem is in fluid communication with the at least one gas-liquid contactor subsystem. The wash water regeneration subsystem receives at least a portion of the used wash water stream, regenerates the wash water stream, and flows the regenerated wash water stream to the wash section. The DAC system can include a capture solution regeneration subsystem receiving at least a portion of the CO2-rich capture solution, regenerate the CO2-rich capture solution, and flow the regenerated CO2 capture solution to the capture section.

The invention relates to a flue gas desulfurization device, and relates to the technical field of flue gas treatment.The flue gas desulfurization device comprises a barrel, the outer side of the barrel communicates with a flue gas inlet pipe, the top of the barrel communicates with a flue gas outlet pipe, and a filtering mechanism and a spraying mechanism are arranged in the barrel; the filtering mechanism comprises a mounting circular frame and a plurality of filtering units, the mounting circular frame is coaxially arranged in the cylinder body, a plurality of mounting sockets are formed in the outer side of the mounting circular frame, the filtering units correspond to the mounting sockets one to one, and the filtering units are matched with the corresponding mounting sockets in an inserted mode; a plurality of filter hole groups are formed in the upper side of the mounting circular frame in a penetrating manner, are in one-to-one correspondence with the mounting sockets and are communicated with the corresponding mounting sockets; a plurality of replacement ports are formed in the outer side of the barrel, correspond to the mounting insertion ports one to one and are communicated with the corresponding mounting insertion ports in an opposite manner, and the filter units are matched with the corresponding replacement ports in an insertion manner. The shutdown time of the flue gas desulfurization device can be shortened, and the flue gas desulfurization efficiency is guaranteed.

The embodiment of the invention discloses a waste incineration SNCR precise control method based on a mechanism model and dynamic prediction, and relates to the technical field of waste incineration power plant flue gas denitration. The method comprises the steps that operation parameters of the garbage incinerator are obtained; constructing a mechanism model, namely a thermodynamic-combustion coupling model, and realizing three-dimensional flow field reconstruction and axial temperature field estimation by utilizing a virtual sensing technology and based on an energy conservation equation, a radiation transfer equation and CFD reverse solution and inversion of a flue gas temperature and a flow field velocity vector; combining the mechanism model and actually measured data, optimizing spray gun parameters by using a particle swarm optimization algorithm, and realizing multi-target balance of denitration efficiency and ammonia escape; and the flow, angle and layout of the spray gun are dynamically adjusted according to the optimized parameters. The method is high in denitration efficiency and low in reducing agent consumption.

A direct air capture (DAC) of CO2 system includes a reaction reactor having a solid, amine-functionalized sorbent configured to sequester CO2 from air; an in-situ dual-function device configured as a CO2 conversion reactor and an exchange fluid regeneration device; and the exchange fluid, recirculating between the reaction reactor and the dual-function device, configured to capture the sequestered CO2 from the solid sorbent in the reaction reactor and release the captured CO2 in the conversion reactor, the exchange fluid including one or more amino acids.

Systems and methods for generating nitric oxide are disclosed. A nitric oxide (NO) generation system includes at least one pair of electrodes configured to generate a product gas containing NO from a flow of a reactant gas; and a controller configured to regulate the amount of nitric oxide in the product gas produced by the at least one pair of electrodes by utilizing duty cycle values of plasma pulses selected from a plurality of discrete duty cycles to produce a target rate of NO production based on an average of discrete production rates associated with each of the plurality of discrete duty cycles.

The invention belongs to the technical field of CO catalytic oxidation, and particularly discloses a method for synthesizing a CuO / CeO2 catalyst through a rapid fluid mixing method and application thereof.The method comprises the steps that a copper salt solution A and a cerium salt solution B are put into a rapid fluid turbulence mixing reactor, the flow speed is controlled, a catalyst precursor is prepared after product treatment, the catalyst precursor is put into a muffle furnace, air is introduced for calcination, and the catalyst is prepared; and high selectivity and high conversion rate in CO oxidation reaction in a hydrogen-rich environment are realized. The method provided by the invention also improves the traditional MOF synthesis method, adopts water as a solvent, and reduces the synthesis conditions. The prepared catalyst has high conversion rate and selectivity, the CO conversion rate at 90 DEG C reaches 100%, and the corresponding selectivity is 100%.

An atmospheric CO2 capture system includes a compartment housing a solid CO2 sorbent, an exchange fluid including a chemical component with selectivity towards CO2, and an electrochemical cell or mineralization reactor in fluid communication with the compartment, the system having a cycle including a first state of sorbing CO2 from incoming air onto the solid CO2 sorbent until a saturation point is reached; a second state of regenerating the sorbent by flooding the compartment with the exchange fluid to detach CO2 from the saturated sorbent and bind the detached CO2 to the chemical component; and a third state of regenerating the chemical component and utilizing the CO2 in the electrochemical cell or mineralization reactor.

The embodiment of the invention provides a method for directly trapping carbon dioxide from air. The method comprises the following steps: capturing carbon dioxide in air through an adsorber; after the carbon dioxide is captured, the interior of the adsorber is vacuumized for the first time; introducing water vapor into the adsorber to increase the pressure in the adsorber and increase the temperature of an adsorbent in the adsorber so as to desorb the carbon dioxide; the adsorber is vacuumized for the second time, and mixed gas formed by water vapor and carbon dioxide is obtained; and carrying out gas-liquid separation on the mixed gas to obtain carbon dioxide. The regeneration energy consumption of the adsorbent is reduced, and the concentration of the carbon dioxide product gas is improved.

In a general aspect, a carbon dioxide removal system is presented. In some cases, a gas-liquid contactor is wetted with an alkaline capture solution. A first flow from a first gaseous feed including CO2 from a first source is directed to interact with the alkaline capture solution in the gas-liquid contactor, which forms a first CO2-rich alkaline capture solution. A second flow from a second gaseous feed including CO2 from a second, distinct source is directed to interact with the first CO2-rich alkaline capture solution, which forms a second CO2-rich alkaline capture solution. In some cases, the second flow is independent of the first gaseous feed, and a concentration of CO2 in the second CO2-rich alkaline capture solution is higher than a concentration of CO2 in the first CO2-rich alkaline capture solution. CO2 can be separated from the second CO2-rich alkaline capture solution.

A dehumidifier according to an embodiment may include a housing including a suction grill formed on a rear surface thereof, and a discharge port formed on an upper surface thereof; a dehumidification module provided inside of the housing; a water tank detachably provided on one side of the housing and that stores condensate generated during a dehumidification process; a discharge cover that opens and closes the discharge port; a tilting module connected to a bottom of the discharge cover inside of the housing to tilt the discharge cover; and a shielding cover that accommodates the tilting module. The dehumidification module may include at least a compressor, a condenser, an evaporator, and a fan module. The tilting module may include a tilting motor fixed to the shielding cover; a tilting gear connected to a shaft of the tilting motor; and a tilting neck curved at a predetermined curvature and having on one surface thereof a tilting rack that engages with the tilting gear.

The invention discloses an intelligent dehumidification and heat dissipation type high-low voltage switch cabinet, and belongs to the technical field of switch cabinets, the intelligent dehumidification and heat dissipation type high-low voltage switch cabinet comprises a cabinet body, a sealing strip is fixedly installed on the front side of the cabinet body, a sealing cabinet door is hinged to the front side of the cabinet body, and a temperature sensor, a humidity sensor, a controller and a control assembly are arranged in the cabinet body; a ventilation assembly, a condensation mechanism, a water collection mechanism and a heat exchange mechanism are sequentially arranged on one side of the cabinet body from top to bottom, and a ventilation assembly is arranged at the bottom of the other side of the cabinet body. Forced ventilation can be achieved through the arranged ventilation mechanism, the ventilation speed can be adjusted according to the temperature, the flow direction of air in the switch cabinet can be changed according to needs, uniform and controllable heat dissipation is achieved, heat dissipation is achieved while dehumidification is achieved through the arranged condensation mechanism, heat dissipation work is further conducted through condensate water, and the dehumidification and heat dissipation effect is improved.

A carbon dioxide (CO2) stream reacts with an amine-modified magnetic nanoparticle in solution to form an amine-CO2 adduct. The solution that includes the amine-modified magnetic nanoparticle is heated by an external alternating magnetic field. The heat provided by the external alternating magnetic field is localized such that only the amine-CO2 adduct is heated to release the CO2, without heating the entire solution. This process helps with the capture and release of CO2 with a significantly reduced energy during the CO2 release step.

Integrated processes and facilities for providing recycled content hydrocarbon products (r-products) from mixed waste plastic are provided. Carbon dioxide capture and energy recovery from one or more process streams described herein increase energy efficiency and help reduce overall environmental impact while producing valuable final products from chemically recycled waste plastic.