16 results about "CARBON DIOXIDE/NITROGEN" patented technology

The invention relates to the technical field of greenhouse gas emission reduction, and discloses a gas injection method for improving coal seam carbon dioxide sequestration efficiency, which comprises the following steps: S1, reservoir evaluation and well pattern deployment; s2, multi-slug alternate injection is carried out; s3, intermittent injection-production operation is carried out; s4, long-term storage monitoring; and S5, stability maintenance measures are taken. According to the method, through an innovative'carbon dioxide-nitrogen-carbon dioxide 'multi-slug alternate injection process and an optimized well pattern deployment strategy, the problems of gas fingering and fluid channeling caused by strong heterogeneity of the coal seam are effectively solved, and particularly, by means of the low viscosity and weak adsorption characteristics of the nitrogen buffer slug, the coal seam gas density is improved, and the coal seam gas density is improved. The carbon dioxide preferentially enters a high-permeability channel and forms a mobility control barrier, so that the subsequently injected carbon dioxide is forced to turn to a medium-low-permeability area, and the swept volume and the contact area of the carbon dioxide in the coal seam are obviously enlarged.

The utility model discloses a biomass combustion boiler, which relates to the technical field of agricultural machinery and comprises a boiler body, and a bag breaking chamber and a hearth are arranged in the boiler body. A plurality of horizontally-arranged branch pipes are arranged in the bag breaking chamber and arranged around straw bags, the ends of the branch pipes are fixed to a main pipe, the main pipe penetrates through the bag breaking chamber and extends outwards, the extending end of the main pipe is provided with a connector, the connector is connected with a hearth or a heat exchanger, and the heat exchanger is connected with the hearth. By means of the arrangement, the main pipe discharges smoke generated by materials in the hearth to the surfaces of straw bags through the branch pipes; smoke contains gas components such as carbon dioxide and nitrogen which do not support combustion, and when the smoke surrounds the straw bags, air (oxygen) can be isolated to a certain degree, so that combustion of the straw bags is inhibited, and the flame-retardant effect is achieved.

A method for synthesizing high-value products from refinery furnace gas is provided. Crude furnace gas from a refinery is purified, and then clean furnace gas is delivered to a three-stage normal pressure reactor in a chemical looping, where nearly pure carbon dioxide, nitrogen, and hydrogen products are obtained in each stage of the process. Nearly pure hydrogen reformed from coke oven gas is used for hydrogen replenishment to adjust a gas structure. Mixed raw materials that meet standards are pressurized and delivered to a synthesizer, and methanol or ammonia products are obtained after gas-liquid separation.

To provide an in-duct fire extinguishing device that can simplify fire extinguishing facilities and reduce costs. [Solution] The duct fire extinguishing device 1 of the present invention is a device installed inside a duct 101, and includes a tank 10 filled with an inert gas (carbon dioxide gas, nitrogen gas, etc.) and a fire extinguishing liquid (potassium carbonate liquid, purified water, etc.), a nozzle 20 equipped with an outlet 51 for spraying the inert gas and fire extinguishing liquid filled in the tank 10 into the duct 101, and a heat-sensitive valve 30 that closes the outlet 51 of the nozzle 20 when the temperature inside the duct 101 is below a set value and opens the outlet 51 of the nozzle 20 when the temperature inside the duct 101 exceeds the set value.

This application relates to a carbon fixation planting and filtration system. The system includes a planting chamber with a receiving trough. From the bottom to the opening of the receiving trough, an air inlet pipe, a plant fiber and carbon-based carbon fixation layer, and a planting layer are sequentially arranged. The air inlet pipe is connected to the plant fiber and carbon-based carbon fixation layer, allowing air entering through the air inlet pipe to reach the plant fiber and carbon-based carbon fixation layer. The planting layer is used for planting plants. Through this carbon fixation planting and filtration system, the air inlet pipe ensures smooth airflow into the plant fiber and carbon-based carbon fixation layer. In the plant fiber and carbon-based carbon fixation layer, trace elements such as carbon dioxide, nitrogen, argon, phosphorus, and potassium, as well as harmful substances in the air, are condensed and solidified. Planting through the planting layer integrates planting, carbon dioxide fixation, and air filtration, achieving multiple objectives: environmental purification, mitigating global warming, and promoting plant growth.

The invention discloses a method for preparing urea through electrochemical catalysis of carbon dioxide and nitrogen, and belongs to the technical field of value-added chemicals constructed through an electrochemical method.The method comprises the steps that S1, a copper dimer is synthesized; s2, synthesizing graphite phase carbon nitride; s3, synthesizing copper diatoms loaded on the surface of the graphite phase carbon nitride; s4, taking silver / silver chloride as a reference electrode, taking a platinum net as a counter electrode, taking the copper diatomic catalyst as a working electrode, and carrying out electrochemical reaction in an H-type electrolytic tank to obtain a urea product; rich and cheap carbon dioxide and nitrogen in nature are used as reaction raw materials, water is used as a proton source, and green, clean and mild synthesis of urea under room-temperature room pressure is realized. More importantly, the catalyst shows good activity, selectivity and stability in a urea electrochemical synthesis reaction; the catalyst can become a low-cost and high-efficiency catalyst applied to urea electrosynthesis.

The patent application relates to a paper-based packaging material with a carrier paper and a first coating arranged indirectly on at least one side of the carrier paper, wherein the first coating is a barrier layer and has an increased diffusion resistance to at least one substance selected from a group comprising fluid, gas, air, oxygen, carbon dioxide, nitrogen, inert gas, odorant, aromatic substance, water vapor, liquid, water, water-fat emulsion, fat, oil, mineral oil, and edible oil, odorant, flavorant, water vapor, liquid, water, water-fat emulsion, grease, oil, mineral oil, and edible oil individually or in combination, wherein the first coating is disposed between the carrier paper and a visually perceptible surface coating and directly contacts the surface coating. Furthermore, the invention relates to a package made of such a paper-based packaging material and a method of manufacturing the same.

A kind of hydrogen bond organic framework material for flue gas desulfurization and its preparation method and application, it relates to flue gas desulfurization technical field, it is to place the activated crystal powder in carbon dioxide atmosphere under the condition of minus 87 ℃ to minus 20 ℃, 6-12 hours are stationary. 1-2 hours are extracted by vacuum pump, carbon dioxide molecule is removed, and the hydrogen bond organic framework material is obtained. Technical effect is, the obtained hydrogen bond organic framework material shows specific adsorption to sulfur dioxide, and hardly adsorbs other components such as carbon dioxide, nitrogen, methane and the like in flue gas. The material itself has good hydrophobicity, the adsorption amount of water is extremely low, greatly reduces the influence of water vapor in real flue gas environment on the adsorption capacity of material, and shows high water stability and acid-base stability, which is beneficial to the application in real flue gas environment. And the material has high cycle stability.

The invention discloses a can sealing purging control method and system based on a production line station and the residual oxygen amount and application, and belongs to the field of food packaging mechanical automation control. The method comprises the steps that historical data on the production line station under the purging conditions of the set can body type, the set material type, the set purging gas and the set purging time are collected; constructing a training sample set based on the historical data on the production line station, and constructing a production line station tank purging prediction model based on the training sample set; the input of the production line station tank purging prediction model comprises tank sealing purging task information and a purging curve, and the output of the production line station tank purging prediction model comprises a residual oxygen amount curve and a final residual oxygen amount; precise control over the amount of the purge gas for the tank body is achieved, waste of the purge gas is reduced while the purge effect is effectively guaranteed, the method is particularly suitable for intelligent replacement purge of inert gas such as carbon dioxide and nitrogen, energy is saved, and consumption is reduced.

The application provides a method for preparing an NH2-UiO-66 membrane on a PES carrier and application. The preparation method comprises the following steps: firstly, pre-modifying the PES carrier; then, placing the PES carrier in a reaction precursor solution to perform multiple solvothermal reactions; after the reaction is completed, washing and drying the prepared membrane to obtain a dense NH2-UiO-66 / PES composite membrane, wherein the reaction precursor solution comprises a metal source, an adjusting agent, a metal source and an organic ligand. The prepared NH2-UiO-66 / PES composite membrane has high connectivity, small intercrystalline defect density, controllable membrane layer thickness and can efficiently separate industrial flue gas such as a carbon dioxide / nitrogen gas mixture. The preparation of the membrane material adopts a solvothermal room-temperature synthesis process, which is simple, and the use of PES instead of porous aluminum oxide (alpha-Al2O3) is conducive to reducing the preparation cost of the membrane, while ensuring high separation performance, and also ensuring that the membrane has an ultra-large flux, so that the NH2-UiO-66 membrane can be scaled up and applied in industrialization.

The present invention provides a 13X molecular sieve and a synthesis method thereof, and relates to the technical field of molecular sieve catalyst preparation, the synthesis method comprises: mixing a sodium aluminate solution, a sodium hydroxide solution and a sodium metasilicate nonahydrate solution, uniformly stirring, stirring for a first time at a first temperature, carrying out a hydrothermal reaction for a second time at a second temperature, and finally filtering, drying and calcining to obtain the 13X molecular sieve. The 13X molecular sieve is obtained. The synthesized 13X molecular sieve has good CO2 adsorption performance, and the CO2 adsorption capacity can reach 6.23 mmol / g. The selectivity ratio of carbon dioxide to nitrogen reaches 57, and the obvious selectivity on carbon dioxide is superior to that of nitrogen, so that the catalyst has good selectivity. In an adsorption-regeneration cycle test, a sample shows stable adsorption-regeneration performance, the adsorption capacity is not obviously reduced, and the sample has good stability under static and dynamic adsorption conditions.

The embodiment of the invention discloses a preparation system and method of high-temperature co-electrolysis synthesis gas. The system comprises a plurality of galvanic pile-hot box modules which are integrated in a skid-mounted assembly and have the same structure, a gas supply system, a quantitative evaporation device, an air supply system and a tail gas treatment system. The gas supply system independently supplies carbon dioxide, nitrogen and hydrogen to each module through a high-pressure gas tank and a gas inlet main pipe; the quantitative evaporation device provides water vapor for each module through an electronic water pump, a high-pressure common rail and an evaporator; the air supply system supplies air to the electric pile cabin and the hot box airflow gap through an air main pipe and an oxygen-enriched air main pipe respectively; the tail gas treatment system treats produced gas through a condenser, a low-pressure tank, a carbon removal device and a compression loop, and cyclic utilization of unreacted gas is achieved. Through the isomorphic modular design and the public main pipeline system, the system can be flexibly expanded from the hundred-kilowatt level to the megawatt level, and the high efficiency and stability of the synthesis gas preparation process are ensured.

The utility model discloses a kind of kiln waste heat refrigeration and flue gas emission reduction integrated equipment, including refrigeration device, purification device and back to furnace pipe, refrigeration device includes flue gas heat exchanger, lithium bromide water chiller and cold taking device, several flue gas passages and several hot water passages are equipped in the inside of flue gas heat exchanger, several flue gas passages are respectively adjacent with several hot water passages Setting, one end of several flue gas passages is communicated with kiln, another end is communicated with exhaust pipe, the heating side of lithium bromide water chiller is communicated with several hot water passages, the cold water side of lithium bromide water chiller is communicated with cold taking device;The purification device includes dust collector and carbon dioxide recovery device, the two sides of dust collector are respectively communicated with exhaust pipe and carbon dioxide recovery device, back to furnace pipe is communicated with exhaust pipe and kiln.The kiln waste heat refrigeration and flue gas emission reduction integrated equipment can recover the waste heat in flue gas discharged by kiln for refrigeration, and can reduce dust, carbon dioxide, nitrogen oxides emission.

The utility model discloses an automatic purification type moxibustion instrument, and relates to the technical field of moxibustion instruments. The multifunctional moxibustion machine comprises a machine box body, a lifting box body is installed in a cavity in one side of the machine box body in a sliding mode, a folding box body is horizontally installed at the top of the lifting box body, a control panel is installed at the top of the machine box body, and a moxibustion box is installed at the top of the folding box body. A smoke purification assembly is arranged between the case main body and the lifting box body, and a locking assembly is arranged between the lifting box body and the folding box body. The control panel controls the combustion bin in the case body to conduct preheating, moxa cone ignition and combustion, gas and particulate matter which are not completely combusted exist, the gas and the particulate matter are sucked into the combustion bin through the centrifugal fan in the lifting box body to be subjected to secondary sufficient combustion, and the combusted gas passes through the filter box to be subjected to secondary sufficient combustion. Harmful gases in the moxa smoke are catalyzed into odorless and non-toxic gases such as carbon dioxide, nitrogen and oxygen to be discharged, so that automatic purification and clean discharge of the moxa smoke are realized.

The invention relates to a zeolite molecular sieve adsorbent and a preparation method and application thereof, and belongs to the technical field of molecular sieves. The preparation method of the zeolite molecular sieve adsorbent comprises the following steps: (1) preparing a solution A containing a silicon source, an acid source and rare earth metal salt, and preparing a solution B containing an aluminum source and an alkali source; (2) mixing the solution A and the solution B obtained in the step (1), and performing ultrasonic aging to obtain aged slurry; and (3) carrying out microwave crystallization, washing and drying on the aged slurry obtained in the step (2) to obtain the zeolite molecular sieve adsorbent. According to the preparation method, rare earth elements are adopted for doping, the rare earth element-doped zeolite molecular sieve is obtained, the pore diameter of the zeolite molecular sieve can be accurately regulated and controlled through introduction of the rare earth elements, and therefore accurate and efficient screening of difficult-to-group components such as carbon dioxide / acetylene, carbon dioxide / nitrogen, carbon dioxide / methane and methane / nitrogen is achieved.

This invention provides a method for the adsorption and replacement of methane in shale using a carbon dioxide / nitrogen mixed gas. The method includes: injecting a first preset amount of methane into a reference cell to obtain first pressure change data; injecting a second preset amount of carbon dioxide / nitrogen mixed gas into the reference cell in stages to obtain second pressure change data; and determining the adsorption amounts of carbon dioxide, nitrogen, and methane by the shale at each pressure point, as well as the desorption amounts of methane in the shale at each pressure point, based on the first and second pressure change data, the volume of the reference cell, and the residual volume of the sample cell. This method fully considers the potential impact of bidirectional gas diffusion on the competitive adsorption of the mixed gas during the adsorption and replacement of methane in shale, providing a solid foundation for improving the recovery efficiency of the adsorbed gas and thus effectively improving shale gas recovery.