17results about How to "Achieve emission reduction" patented technology

The invention discloses a method for preparing nano vaterite calcium carbonate from carbonized carbide slag. The method comprises the following steps: 1) pretreatment of raw materials: drying the carbide slag, and grinding the carbide slag into powder for later use; 2) leaching: mixing the carbide slag, ammonium chloride and deionized water, stirring at normal temperature, reacting, and filtering to obtain filter residue and calcium-containing filtrate; and 3) carbonization reaction: introducing the calcium-containing filtrate obtained in the step 2) into an external circulation supergravity reactor, introducing CO2 gas at the same time, carbonizing at normal temperature, and filtering, washing and drying to obtain the nano vaterite type calcium carbonate. The method aims at the problems that in an existing process for preparing vaterite calcium carbonate from carbide slag, product particle size distribution is large, production efficiency is low, and additives are needed, and nano vaterite type calcium carbonate with the small particle size (50-80 nm) and uniform distribution can be efficiently prepared.

The invention belongs to the technical field of wastewater and waste gas treatment, and discloses a method and a device for resource preparation of a sulfur autotrophic denitrification filler, and a nitrate-nitrogen-containing wastewater treatment method, the method comprises the following steps: S1, coal gas purification: preparing red mud slag into red mud slurry, and inputting the red mud slurry into a desulfurization and decarbonization unit to desulfurize and decarbonize coal gas; s2, material separation: carrying out solid-liquid separation on the used red mud slurry, drying the obtained solid, enabling the liquid to enter a freezing crystallization unit to obtain a crystallized solid phase and a concentrated liquid phase, and mixing the concentrated liquid phase with the used red mud slurry; and S3, filler preparation: preparing the dried solid into a carrier, and then mixing and loading the carrier with the crystallized solid phase to prepare the sulfur autotrophic denitrification filler. According to the method, resource utilization of hazardous waste can be achieved, the wastewater treatment cost is reduced, and the obtained filler can stably treat wastewater.

This invention provides a waste heat utilization device and process for the production of long-chain nylon resin. The waste heat utilization device includes a polymerization reactor, an evaporator, a steam manifold, and a hot water circulation system. The hot water circulation system includes a hot water storage tank and a hot water circulation pump. The polymerization reactor is connected to the inlet of the hot water storage tank via an exhaust pipe to the hot water storage tank and to the inlet of the evaporator via an exhaust pipe to the evaporator. The outlet of the evaporator is connected to the steam manifold via an inlet pipe. The steam manifold is connected to the steam user end via a steam pipeline to the steam network. The outlet of the hot water storage tank is connected to the hot water user end via the hot water circulation pump and a hot water pipeline. This invention uses the steam discharged during the polymerization process as a heat medium to heat deionized water to obtain saturated steam and hot water, which are then supplied to the factory's steam and hot water users. This fully utilizes the waste heat from the polymerization process, reduces the factory's steam consumption, and lowers production energy consumption.

The utility model discloses a toothed ring pickling device based on acid waste gas emission reduction, and relates to the technical field of toothed ring processing, the toothed ring pickling device comprises a treatment tank, a sealing cover and a spraying assembly, the inner side of the treatment tank is provided with a storage frame, and the side surface of the storage frame is provided with a lifting assembly; the lifting assembly comprises a driving motor, a rotating rod, a rotating rod, a rotating gear, a transmission chain wheel, a transmission chain, an electric push rod, a limiting roller and a limiting rod. According to the toothed ring pickling device based on the acid waste gas emission reduction, the lifting assembly and the spraying assembly are arranged, in the process that the pickling device is used for conducting pickling treatment on a toothed ring during toothed ring machining, the acid waste gas generated during toothed ring workpiece pickling is conveniently collected, and follow-up centralized treatment on the acid waste gas is facilitated; and meanwhile, the alkaline solution and the acid waste gas are subjected to neutralization reaction, so that air pollution caused by direct discharge of untreated acid waste gas is avoided, and workers can conveniently use the gear ring pickling device.

This invention relates to the field of flue gas pollution control technology in coal-fired power plants, and discloses a method for total pollutant emission reduction in an environmental protection island based on morphological transformation and residual compensation. The method includes: acquiring real-time operating data of a smart environmental protection island in a coal-fired power plant, generating a time-series feature vector, and setting inlet boundary conditions; constructing a pollutant morphological transformation mechanism model for each environmental protection subsystem, inputting relevant data and inlet boundary conditions, and calculating the theoretical baseline concentration of pollutants; using an LSTM as an error-compensated prediction model, after training with historical data, inputting the current operating condition time-series feature vector to obtain the concentration prediction residual value, obtaining the deviation between the historical training conditions and the current operating conditions, calculating the confidence factor, and generating a mixed pollutant prediction concentration; finally, using ammonia injection flow rate and other factors as optimization variables, setting constraints, and constructing an objective function with the lowest total cost to obtain the optimal control parameter set, thereby achieving optimized control and pollutant emission reduction of the environmental protection subsystem. This invention significantly improves the pollutant emission reduction effect.

The application discloses a workshop constant temperature and humidity control method and system based on ultrasonic cold atomization, and belongs to the technical field of industrial environment control. In view of the defects of high energy consumption, heat interference, control lag and too tight coupling with a production system of a steam humidification mode in the prior art, the method comprises the following steps: obtaining real-time humidity of a workshop, and generating a standard industrial simulation control signal by an air conditioner main control unit; the signal is converted into a driving signal through an independently arranged signal conversion control module, and normal-temperature atomized water vapor output by an ultrasonic cold atomization humidification device is controlled, so that the original steam humidification device is completely replaced. The system also has a manual control mode and a state display function, and can realize decoupling of humidification and a boiler, so that the boiler is completely stopped when a production line is shut down. The application replaces fossil fuels with electric energy, saves energy and reduces cost, eliminates heat interference and improves temperature control accuracy, and can be seamlessly integrated without modifying the original PLC program, thereby supporting lean energy management.

The carbon dioxide conversion system comprises a first mixing chamber, an electrochemical reactor, a first conversion unit and a second conversion unit, the feeding end of the first mixing chamber is suitable for introducing a to-be-reacted object and water; the discharge end of the first mixing chamber is communicated with the feed end of the electrochemical reactor, and the electrochemical reactor is configured to perform a water half-splitting reaction on water to generate hydroxyl ions and hydrogen ions, and respectively react with a to-be-reacted object based on the generated hydroxyl ions and hydrogen ions to generate a first product and a second product; the feeding end of the first conversion unit is communicated with the first discharging end of the electrochemical reactor, and the first conversion unit is configured to convert a first product generated by the electrochemical reactor; the feeding end of the second conversion unit is communicated with the second discharging end of the electrochemical reactor, and the second conversion unit is configured to capture carbon dioxide by using a second product generated by the electrochemical reactor and convert the carbon dioxide into a third product.

A method and a reaction system for converting waste plastics into chemical raw materials belong to the field of petroleum chemical industry, comprising: after being crushed, the waste plastics are mixed with part of the circulating liquid hydrocarbon in the product, extruded into a microwave device through a feeder for pretreatment; entering a moving bed reaction-regeneration device, and contacting with a spherical catalyst with a low silicon aluminum ratio and containing phosphorus ZSM-5 zeolite on a silicon aluminum active carrier with a particle size of 1-5 mm, and performing thermal cracking-catalytic cracking reaction at 400-540 DEG C; the product enters a later process to separate ethylene, propylene, butene, aromatic hydrocarbon production raw materials and liquid hydrocarbon for circulation; the deactivated catalyst enters a regenerator for coking and then is recycled; the application improves the reaction rate and conversion efficiency of the waste plastic conversion process, the stability of material conveying and operation, produces high value-added products while eliminating white pollution, reduces oil and gas resource consumption and realizes carbon emission reduction, and has good economic and environmental benefits.

The present application relates to a kind of sintering method for reducing the CO content of sintering flue gas, by the reasonable cooperation of measures such as layer thickness, material distribution mode, flue gas reuse composite oxygen-enriched sintering and flue gas carbon monoxide catalytic oxidation in each step, the content of carbon monoxide in the emission flue gas is greatly reduced, so that the environmental friendliness of flue gas emission is greatly improved.

The invention relates to a low-temperature flue gas purification system which comprises a heat exchanger, a flue gas heating device and a reactor, a flue gas outlet in the raw flue gas side of the heat exchanger is connected with a flue gas inlet of the flue gas heating device, and a flue gas outlet of the flue gas heating device is connected with a flue gas inlet of the reactor through a reactor inlet flue. The flue gas outlet of the flue gas heating device is further connected with a flue gas inlet of the clean flue gas side of the heat exchanger through a bypass flue, the flue gas outlet of the reactor is connected with the flue gas inlet of the clean flue gas side of the heat exchanger, and the flue gas outlet of the clean flue gas side of the heat exchanger is used for discharging clean flue gas outwards. The flue gas outlet of the clean flue gas side of the heat exchanger is further connected with the flue gas inlet of the original flue gas side of the heat exchanger through the circulating flue, the reactor inlet flue, the bypass flue and the circulating flue are all provided with windshields, and the influence of liquid water and high-concentration sulfur oxide in low-temperature flue gas on a catalyst can be avoided through the bypass flue and the circulating flue.

The present invention provides a metal-free catalyst for acetylene hydrochlorination reaction, and a preparation method and application thereof, which belongs to the technical field of catalyst preparation. The catalyst is a composite carbon-based catalyst of porous carbon-nitrogen-coated silicon oxide. The preparation method of the catalyst is as follows: magnesium powder and silicon-containing oxide are fully mixed and placed in a tubular furnace, the tubular furnace is heated to a specified temperature under an inert gas, and then a mixture of carbon dioxide and nitrogen is introduced for reaction, and after a certain period of time, the inert gas is switched and the temperature is lowered to obtain a black powder; the black powder is soaked in an acidic solution, and then washed with deionized water to neutrality, and then dried to obtain the metal-free catalyst. The metal-free catalyst of the present invention has a high specific surface area, rich pore structure and strong mechanical strength, and uses carbon dioxide as a carbon source, thereby achieving carbon emission reduction and high-value utilization of carbon dioxide.

An abatement apparatus for treating an exhaust gas stream from a manufacturing treatment tool is provided. The abatement apparatus includes: a process chamber at least partially defined by a first porous wall and including an inlet configured to enable an exhaust stream from the manufacturing process tool to enter the process chamber; a second porous wall substantially surrounding the first porous wall and defining therebetween a second chamber, the second chamber being porous to allow a flow of gas therethrough; one or more heating elements disposed within the second chamber and configured to heat gas flowing through the second chamber during use; a third porous wall substantially surrounding the second chamber and defining therebetween a third chamber comprising a relatively insulating material, the third chamber being porous to allow gas flow; and a gas inlet. Wherein the apparatus is configured such that, in use, a gas stream is delivered from the gas inlet through the third chamber and the second chamber to the process chamber, where the gas stream reacts with the exhaust gas stream.

The application relates to the technical field of energy storage, and discloses a thermal-chemical storage coupling oxygen-enriched combustion utilization system and method for waste heat of a thermal power plant, wherein a heat energy output end of high-temperature flue gas or steam bypass of the thermal power plant is connected to a heat energy input end of a thermal-chemical energy storage and release reaction unit, necessary heat energy is provided for an energy storage reactor, heat carried by flue gas of the thermal power plant and heat carried by steam which is easily wasted during low-load operation are fully utilized, the utilization efficiency of heat energy of the thermal power plant is improved, energy waste is reduced or avoided, the thermal-chemical energy storage and release reaction unit and an energy storage reaction material storage container are sequentially and circularly connected to form a loop, a thermal-chemical reaction product can be simply regenerated through an oxidation reaction, heat is released and recycled, and the waste heat of the thermal power plant is effectively stored and utilized, energy consumption is reduced, and energy is saved.

The invention provides a method for treating acidic wastewater by using a double-membrane method, which comprises the following steps: sequentially pre-treating acidic wastewater generated in an electrode foil formation process through a microfiltration unit and an activated carbon adsorption unit to obtain a pre-treatment solution; the pretreatment liquid is introduced into a nanofiltration unit for separation, and nanofiltration concentrated liquid and nanofiltration produced water are obtained; the nanofiltration produced water is introduced into a reverse osmosis unit for deep desalination, and reverse osmosis produced water is obtained; and returning the nanofiltration concentrated liquor to an electrode foil formation tank for recycling, and recycling the reverse osmosis produced water to a production line.

The invention particularly relates to a nuclear reactor radioactive airborne effluent decrement emission device, which belongs to the field of radioactive waste gas treatment, and comprises each process unit and a process control module matched with each process unit, and each process unit adopts a modular design; each process unit realizes process operation control through a matched process control module; each process unit comprises a pretreatment unit used for removing moisture, particles and short-life nuclides in airflow; the pressurizing unit is used for increasing airflow pressure; the rapid dehydrogenation unit is used for separating light components in the gas flow; the nuclide trapping unit is used for trapping hydrocarbon and krypton-85 in the airflow; and the tail gas emission unit is used for tail gas detection and atmosphere emission of the nuclide trapping unit. According to the method, the long-service-life gaseous nuclide reduction emission requirement of an existing nuclear reactor is met, and recycling and resource utilization of related nuclides are achieved.

This invention provides a negative carbon thermal circulation upgrading furnace and its application, relating to the field of industrial solid waste treatment technology. The upgrading furnace includes at least three assemblable unit modules, each comprising a furnace body, multiple horizontally inserted U-shaped pipes, an air inlet main pipe, and an exhaust main pipe. The furnace body has a rectangular cross-section, with opposing through holes on the front and rear walls. The U-shaped pipes, including U-shaped air inlet pipes and U-shaped air outlet pipes, are inserted into these through holes. The U-shaped air inlet pipes are connected to the air inlet main pipe, and the U-shaped air outlet pipes are connected to the exhaust main pipe. Based on this main body, flue gas is introduced or discharged through the horizontally inserted U-shaped pipes, enabling flexible control of material drying, internal combustion, reheating, and cooling within the furnace. This invention also provides applications of the upgrading furnace. Through modular furnace design and a high-efficiency flue gas circulation system, this invention achieves low-energy, high-value treatment of various solid wastes, ultimately achieving a negative carbon target.