241 results about "Low carbon dioxide" patented technology

The invention discloses a multi-amino absorbent for carbon dioxide capture and a method for capturing carbon dioxide from a gas mixture, and belongs to the technical field of gas separation and carbon capture, utilization and storage. The multi-amino absorbent at least comprises a first component and a second component, wherein the first component is at least one N-hydroxyalkyl-N '-hydroxyalkyl-alkane diamine; the second component is at least one organic amine different from the first component, and the organic amine contains amino groups which are not primary amino groups and does not contain steric hindrance amino groups; and a solvent and optionally an additive. The method for capturing carbon dioxide from a gas mixture includes contacting the polyamino absorbent with a gas mixture containing carbon dioxide, thereby capturing carbon dioxide. The polyamino absorbent disclosed by the invention has the advantages of low carbon dioxide absorption reaction heat in normal-pressure flue gas, high circulating absorption amount, high absorption rate, high desorption rate, low volatility and the like.

Provided is a carbon dioxide capture system using heat pumps for waste heat recovery and utilization. In the system, waste heat recovery and upgrading are performed, by means of a first waste heat recovery heat pump, on a lean solution in a medium-temperature section that has been cooled by means of a lean-rich solution heat exchanger, and / or waste heat recovery and upgrading are performed, by means of a third waste heat recovery heat pump, on reaction waste heat of an absorption solution; and recovered waste heat is used for heating a medium-lean solution at the bottom of a desorption tower to perform carbon dioxide desorption, thereby realizing the recovery and full upgrading of low-grade waste heat, and thus achieving the aim of full utilization of low-grade waste heat. By means of a first coupled heat exchanger and / or a second coupled heat exchanger, the system further makes the working medium, which is obtained after recovered heat energy is reused for carbon dioxide desorption, further exchange heat with a split cold rich solution to preheat the cold rich solution, thereby realizing coupled utilization of energy inside the carbon dioxide capture system, and thus effectively reducing the heat consumption and operating costs of the carbon dioxide capture system.

The invention discloses application of a mineralized carbon sequestration strain, the mineralized carbon sequestration strain is classified and named as Halomonas sulfidaeresis. ZN2 #, the mineralized carbon sequestration strain is preserved in the China General Microbiological Culture Collection Center (CGMCC), and the preservation number is CGMCC No.32033. The invention further discloses a preparation method of the mineralized carbon sequestration strain. The mineralization carbon sequestration strain can metabolize to generate urease and carbonic anhydrase at the same time, the two enzymes are subjected to a dual mineralization reaction in combination with a microorganism-induced calcium carbonate precipitation technology, the crystal form of a mineralization product is improved, the mineralization strength is improved, meanwhile, carbonic anhydrase can absorb carbon dioxide in the environment, high-strength soil reinforcement is achieved, meanwhile, carbon dioxide emission is reduced, and the soil quality is improved. Therefore, the dual effects of biomineralization remediation and improvement and carbon sequestration and emission reduction of the soil are achieved, and sustainable development of a soil bioremediation and improvement technology is achieved.

The invention relates to the technical field of solid waste resource utilization, in particular to a large-volume solid waste sludge curing agent which comprises the following raw materials: granulated blast furnace slag, steel slag, sulfate, lithium slag, carbonized steel slag powder and P.O 425 cement. During preparation, the raw materials are uniformly mixed and put into a planetary ball mill to be mixed and ground, and then are uniformly mixed with water according to the mass ratio of 1: 1 to obtain the sludge curing agent with the large solid waste mixing amount. According to the invention, the sludge curing agent with large solid waste content is prepared from industrial solid wastes such as steel slag, mineral slag, lithium slag and sulfate and less or even no cement, and is used for curing sludge, so that the dependence on traditional high-carbon emission materials is greatly reduced, and the curing effect is enhanced. Compared with the prior art, a high-temperature calcination process is not adopted in the curing agent preparation process, the emission of carbon dioxide can be effectively reduced, and the current low-carbon and environment-friendly trend is met.

To provide a hydraulic composition having flowability, fluidity retention property, and strength development property, and capable of reducing a carbon dioxide balance.SOLUTION: A hydraulic composition containing water, at least one aggregate selected from a fine aggregate and a coarse aggregate, a powder containing a binding material, and a chemical admixture is such that: at least one condition selected from the conditions that the powder contains CO2 fixing fine powder, the fine aggregate contains CO2 fixing modified and recycled fine aggregate, and the coarse aggregate contains CO2 fixing modified and recycled coarse aggregate is satisfied; a mass ratio (water / binding material) of water to the binding material contained in the powder is 0.3-0.9; and a content of the chemical admixture is 0.02-1.0 pt.mass based on 100 pts.mass of the binding material.SELECTED DRAWING: None

The invention discloses a system and a method for preparing low-carbon olefin through carbon dioxide adsorption and in-situ oxidative dehydrogenation. The invention provides a system and a method for integrating carbon dioxide capture and in-situ oxidation low-carbon alkane (ethane / propane) dehydrogenation, a bifunctional material is composed of an adsorbent and a catalyst, and capture of carbon dioxide and in-situ oxidation low-carbon alkane dehydrogenation can be realized in the same reaction tower, so that the highest one-way carbon dioxide conversion rate can reach 100%, and the conversion rate of carbon dioxide can reach 100%. And meanwhile, the ethylene yield reaches 26%. According to the method, the problems of additional product separation and product gas recycling caused by low carbon dioxide conversion efficiency in the prior art are avoided, and effective heat management is realized, so that the process of integrating carbon dioxide capture and preparing low-carbon olefin by oxidizing low-carbon alkane has more economic advantages.

The invention provides a coal-based solid waste acid-activated cementing material and a preparation method thereof, and the preparation method comprises the following steps: fully crushing, calcining and ball-milling coal gangue, coal series kaolin and kaolin tailing slag to obtain a ball-milled material; grinding and sieving the sludge incineration ash to obtain screen underflow, and adding an extracting solution into the screen underflow to prepare an acid activator; mixing and stirring an acid activator and the ball-milled material to obtain neat paste; and carrying out pouring molding on the neat paste, and carrying out sealing maintenance to obtain the coal-based solid waste acid-activated gel material. The coal-based solid waste acid-activated cementing material prepared by the preparation method provided by the invention has good cementing property and mechanical property, and the preparation process is low in energy consumption, less in carbon dioxide emission, easily available in raw materials and low in price, so that the resource utilization of solid wastes is effectively realized; an engineering application foundation is laid for replacing cement on a large scale or preparing concrete for buildings, and the method can also be applied to soil remediation of contaminated sites.

The present invention provides a low shrinkage hybrid steel fiber recycled aggregate ultra-high performance concrete and a preparation method thereof, and belongs to the technical field of concrete. The low shrinkage hybrid steel fiber recycled aggregate ultra-high performance concrete of the present invention has high strength, good toughness, low shrinkage, and at the same time has the advantages of low cost and green environmental protection. By replacing part of the cement as a cementitious material with a large amount of fly ash, not only can its volcanic ash activity and particle filling effect be fully exerted, but also carbon dioxide emissions can be reduced. The present invention uses aeolian sand and recycled fine aggregate to replace traditional quartz sand through grading optimization, and then reduces the shrinkage of ultra-high performance concrete by adding recycled coarse aggregate and utilizing the volume stabilization effect of recycled aggregate. Finally, long steel fibers are added to cooperate with fine steel fibers to improve the flexural toughness of ultra-high performance concrete.

The invention provides a supercritical carbon dioxide pipeline and storage well linkage flow control method and device, and relates to the field of carbon dioxide geological storage, the method comprises the following steps: determining the pressure deviation between the reservoir pressure and the configured target pressure based on the obtained pipeline data, bottom hole pressure data and reservoir pressure data; based on the pressure deviation, the first opening degree of an injection control valve of supercritical carbon dioxide and the second opening degree of an injection control valve of a corresponding water injection opening in the water injection pipeline are determined. The pressure deviation can be accurately calculated by acquiring the pressure data of the pipeline, the well bottom and the reservoir and comprehensively considering the influence of the pipeline parameters on the pressure. Based on the deviation, the opening degrees of the carbon dioxide and water injection control valves are determined through scientific methods such as proportional control and flow and opening degree curves, and cooperative control over the carbon dioxide and the water injection control valves is achieved. According to the method, the problem that the reservoir pressure is too high or too low due to improper injection flow can be effectively avoided, the carbon dioxide leakage risk is reduced, and the sealing efficiency is improved.

The invention relates to the technical field of carbon dioxide capture, and discloses a carbon dioxide capture system and a method for reducing energy consumption in the carbon dioxide capture process. The system comprises an absorption tower, a rich and lean liquid heat exchanger, a regeneration tower, a waste heat recovery refrigeration device, a regeneration gas cooler, a regeneration gas separator and a compressor which are sequentially arranged in the circulation direction of raw material flue gas containing CO2, wherein the absorption tower is used for enabling raw material flue gas containing CO2 to be in contact with an absorbent to obtain a rich solution; the lean and rich solution heat exchanger is used for carrying out heat exchange on the rich solution and a lean solution obtained at the bottom of a regeneration tower; and the waste heat recovery refrigerating device is used for carrying out waste heat recovery on regenerated gas at the top of the regeneration tower and uncondensed gas at the outlet of the compressor. According to the system, the waste heat recovery refrigerating device is adopted, so that power consumption and absorbent loss of the carbon dioxide system are reduced.

Provided are a method for controlling the amount of scale formation of a metal material, an apparatus for controlling the amount of scale formation, and a method for operating a heating furnace, for controlling the amount of scale formation within an appropriate range when it is desired to reduce the amount of carbon dioxide emission by using hydrogen and ammonia as fuel gas for a heating furnace for heating a metal material. A method for controlling the scale generation amount of a metallic material in a heating furnace, in which a hydrogen-based gas having hydrogen and / or ammonia as the total amount is used as a fuel, the metallic material is heated by a burner, and the flow rate of the hydrogen-based gas used for the fuel heated by the burner is set as an operating parameter of the heating furnace. The amount of scale generated on the surface of the metal material is controlled on the basis of the set flow rate of the hydrogen-based gas. Furthermore, it is preferable that at least one of the heating time and the heating temperature of the metal material in the heating furnace be further set as the operating parameters of the heating furnace.

The invention provides a reverse mixed carbon dioxide pre-fracturing pump injection design method, which belongs to the technical field of horizontal well fracturing, and comprises the following steps: acquiring basic parameters of a target oil reservoir, and determining reservoir transformation requirements; according to the target oil reservoir transformation requirement, a reservoir transformation design scheme is determined through numerical simulation, and fracturing transformation parameters of the target area body are determined; according to the target oil reservoir transformation requirement, the reverse mixing pump injection technology is optimized; carbon dioxide pre-construction parameters are optimized according to indoor experiments and numerical simulation; and constructing a reverse mixed carbon dioxide pre-fracturing pump injection program by utilizing the fracturing transformation parameters, the reverse mixed pump injection process and the carbon dioxide pre-construction parameters. According to the method, the carbon dioxide pre-fracturing construction difficulty is reduced, and the carbon dioxide pre-fracturing yield increasing effect is improved.

The invention discloses a device and method for evaluating the sealing performance of a shaft under the geological storage in-situ condition of carbon dioxide, and the device comprises a corrosion shaft test module, a carbon dioxide displacement module, a gas channeling simulation module, a shaft temperature and pressure control module and a stratum temperature and pressure control module. The shaft assembly is arranged in the testing shell in a penetrating mode, closed cavities are formed between the top end of the shaft assembly and the top end of the testing shell and between the bottom end of the shaft assembly and the bottom end of the testing shell, and a gas flow meter is installed at the top end of the testing shell. And a confining pressure bin and a heating bin are sequentially arranged in the test shell in the radial direction away from the shaft assembly. The device can simulate the lithology-temperature-pressure-carbonic acid environment in the geological storage process of carbon dioxide, and the sealing capacity of a shaft under the in-situ service condition is evaluated; therefore, the purposes of optimizing the formula of the cement paste, optimizing the material of the sleeve and reducing the risk of carbon dioxide leakage are achieved.

The invention discloses application of a carbon dioxide adsorption catalytic material in capturing carbon dioxide in air and catalytically converting the carbon dioxide into synthesis gas, relates to a preparation method and application of a material for directly capturing and preparing green synthesis gas in situ, and belongs to the field of carbon dioxide adsorption catalytic bifunctional materials. The preparation method of the material comprises the following steps: manufacturing a large number of point defects on silver-loaded graphene aerogel through thermal reduction and plasma treatment, grafting an ionic liquid, synthesizing a novel bifunctional catalyst, and carrying out direct air trapping and catalysis in an adsorption column, so as to obtain the silver-loaded graphene aerogel. The synthesized novel catalyst can be used for capturing at low carbon dioxide concentration, and then catalyzing carbon dioxide into synthesis gas through electro-catalysis, so that a product with a high additional value is obtained.

A method comprising: reducing the pressure of a carbon dioxide injection stream using a first pressure reducer having a depth and producing a reduced-pressure carbon dioxide stream; reducing the pressure of the reduced-pressure carbon dioxide stream using a second pressure reducer located at a lower depth than the first pressure reducer to produce a further reduced-pressure carbon dioxide stream; and injecting the further reduced-pressure carbon dioxide stream into a reservoir having a depth; wherein the pressure of the carbon dioxide stream at the depth of the first pressure reducer is greater than the bubble point pressure of the carbon dioxide injection stream at the depth of the first pressure reducer; and wherein the pressure of the further reduced-pressure carbon dioxide stream at the depth of the reservoir is less than the minimum fracture pressure of the reservoir at the depth of the reservoir.

The invention discloses a catalyst for preparing low-carbon olefin by directly hydrogenating mixed gas of CO and CO2 as well as preparation and application of the catalyst. The catalyst comprises a metal oxide and a molecular sieve compound which have catalytic activity in preparation of low-carbon olefin by direct hydrogenation of CO and CO2 mixed gas, the molecular sieve compound is of an SAPO (at) MO core-shell structure with an SAPO molecular sieve as a core and an inert oxide MO as a shell. The catalyst is used for preparing low-carbon olefin through direct hydrogenation of CO and CO2 mixed gas, the conversion efficiency of carbon monoxide can be remarkably improved, the high selectivity of olefin is kept, and the selectivity of carbon dioxide is reduced.

The present invention discloses an adjustable endoscopic surgical mask, which relates to the technical field of endoscopic masks and comprises a mask body, wherein the mask body comprises an outer layer and an inner layer, wherein the inner layer connects an oxygen supply port to an interface of an oxygen cylinder through a pipeline, and a front throttle for controlling the gas flow is provided at the oxygen supply port, a carbon dioxide outlet is provided on a sealing member, the sealing member is connected to a negative pressure device through a pipeline, and a rear throttle for controlling the gas flow is installed at the carbon dioxide outlet; a baffle is provided, and an exhalation collection layer is semi-closed by the baffle, so that the gas passes through the baffle, the energy of the carbon dioxide gas flow is weakened, and the range of carbon dioxide gas diffusion is reduced, so as to improve the oxygen quality at the nasal inhalation; according to the angle of the exhaled gas of different users, the carbon dioxide is integrated into the directionally moving gas, so as to effectively prevent the gas from flowing back into the mask, and reduce the risk of cross infection.

The invention discloses an energy-saving environment control system for cultivating low-carbon-dioxide valuable and rare bacteria, and relates to the technical field of fungus cultivation equipment. A multi-gear frequency conversion fan is arranged in a power cabin, an HEPA filter screen and an activated carbon layer are sequentially arranged in a filter cabin, a spiral water-cooling coil pipe and a wet curtain device are arranged in a cooling cabin, an ultraviolet lamp and a photocatalyst coating are arranged in a disinfection cabin, and a fin type heat exchanger and a phase change energy storage module are arranged in a heat recovery cabin; the dynamic ventilation pipeline comprises a main air duct which is telescopic and heat-insulating, an electric air valve array is arranged at the tail end of the dynamic ventilation pipeline, a bypass mechanism is provided with a bypass pipeline and a switching valve, and air ports are formed in the tail ends of a plurality of branches; the monitoring and control unit comprises a PLC (Programmable Logic Controller) and is electrically connected with a temperature and humidity sensor, a CO / O concentration sensor, a wind speed sensor, an air quality sensor, a built-in timer and a logical operation module; precise control over the cultivation environment of the rare bacteria and efficient utilization of heat energy are achieved.

The present invention proposes a combined storage tank for ammonia fuel and cargo on a CO2 transport ship, which cleverly combines the fuel tank and cargo hold of an ammonia-powered CO2 transport ship, immersing the CO2 storage tank in liquid ammonia fuel, and using the cold energy of the liquid ammonia fuel to reduce the temperature difference between liquid carbon dioxide and the external environment, thereby reducing the evaporation rate of carbon dioxide BOG; and when the CO2 transport ship returns to the loading port, the temperature of the CO2 storage tank is relatively low, and the CO2 storage tank does not need to be pre-cooled when refilling carbon dioxide. In addition, the present invention utilizes a combined storage tank to store liquid ammonia fuel and liquid carbon dioxide at the same time, so the ship does not need to be equipped with a larger fuel tank separately, which improves the utilization rate of the ship's cargo hold space and solves the technical problem of storing liquid ammonia fuel on board the ship; at the same time, the cargo capacity of liquid carbon dioxide is greatly increased, the operating efficiency of the ship is improved, and it has good economy.

The present invention relates to the technical field of carbon dioxide capture, utilization and storage, and specifically to a carbon monoxide preparation system coupled with electrolytic water internal circulation. The specific technical scheme is: a carbon monoxide preparation device coupled with electrolytic water internal circulation, comprising an in-situ combustion reactor, the combustion reactor is sealed with a water storage pipe all around, coal is placed inside the combustion reactor, a carbon monoxide coarse screen pipe is arranged on the top of the coal, a flame nozzle is arranged at the bottom of the coal, the flame nozzle is connected to the hydrogen injection pipe, an oxygen nozzle is arranged on the side of the flame nozzle, and nozzles are respectively arranged on both sides of the coal, one end of the nozzle penetrates and extends out of the water storage pipe, and the end of the nozzle extending out of the water storage pipe is respectively located in the first mixing domain and the second mixing domain. The present invention solves the problems of low carbon dioxide conversion efficiency and storage difficulties.

The utility model provides a natural gas decarburization system, which comprises an absorption tower with a gas inlet at the lower part, a liquid inlet at the upper part, a gas outlet at the top and a liquid outlet at the bottom; the gas inlet is used for receiving raw material gas, the liquid inlet is used for receiving alcohol amine liquid, the raw material gas is arranged from bottom to top in the absorption tower, the alcohol amine liquid is arranged from top to bottom in the absorption tower, the liquid outlet is used for outputting rich liquid, and the gas outlet is used for outputting purified gas outwards; the cooler is arranged at the upper part in the absorption tower and is positioned below the gas outlet; the upper part of the regeneration tower is provided with a liquid inlet communicated with the liquid outlet to receive rich liquid, the bottom of the regeneration tower is communicated with the liquid inlet, and the top of the regeneration tower is provided with a gas output port for outputting carbon dioxide; the reboiler is arranged at the lower part in the regeneration tower and is used for heating liquid in the regeneration tower to release carbon dioxide and obtain barren liquor; and the condenser is arranged at the upper part in the regeneration tower and is positioned below the gas output port so as to reduce the temperature of the carbon dioxide gas.

The invention belongs to the technical field of natural gas treatment, and discloses a process and a system for recovering ethane and other light hydrocarbon components from oilfield associated gas. A washing tower is arranged before dehydration, heavy hydrocarbon components in the oilfield associated gas are removed, the influence of the heavy hydrocarbon components on a molecular sieve dehydration device is reduced, the service life of a molecular sieve is prolonged, and a liquid phase separated by a low-temperature separator is cooled by a cold box to be cooled and throttled to enter the top of a demethanizing tower; and the low-temperature freezing blockage influence of the carbon dioxide component on the demethanizer can be well reduced.

The utility model discloses a kind of ammonia mixed combustion's cyclone combustor. Among them, cyclone combustor includes: first shell, with combustion chamber intercommunication;Center primary air pipe, setting in first shell, center primary air pipe with combustion chamber intercommunication;First grade ammonia gas passage, setting in center primary air pipe;Secondary air duct, with first shell intercommunication, and secondary air duct with combustion chamber intercommunication;Second grade ammonia gas passage, with first shell intercommunication, and second grade ammonia gas passage outer sleeve in secondary air duct outside. Such setting can reduce the emission of carbon dioxide and other harmful substances, with lower carbon emission and higher combustion efficiency;While it can also reduce the emission of furnace outlet nitrogen oxides, protect environmental quality.

The present invention discloses a carbon dioxide capture system, comprising: a catalytic desorption reactor; a catalytic desorption unit disposed within the catalytic desorption reactor, the catalytic desorption unit comprising a plurality of trays and a liquid accumulation tray arranged sequentially along a first direction, the trays being loaded with a solid catalyst; hollow regions extending through the trays along the first direction, the orthographic projections of the hollow regions of the odd-numbered trays and the orthographic projections of the hollow regions of the even-numbered trays being at least partially non-overlapping along the first direction; the first direction being from the top of the catalytic desorption reactor toward the bottom of the catalytic desorption reactor. A rich liquid formed after an organic amine solution absorbs carbon dioxide enters the catalytic desorption reactor for desorption. The desorption reactor is equipped with a plurality of trays loaded with catalyst, thereby increasing the desorption rate of the rich liquid and reducing the desorption temperature, thereby reducing the energy consumption for regenerating the rich liquid in the carbon dioxide capture system.

The invention belongs to the technical field of solid oxide batteries and electrolytic cells, and relates to the field of carbon dioxide reduction and methane oxidative coupling, in particular to a solid oxide electrolytic cell anode material, a solid oxide electrolytic cell and a preparation method and application of the solid oxide electrolytic cell anode material. The general formula of the chemical formula of the anode material is Ln < 0.6 > Sr < 0.4 > Mn < 1 + x > O < 3-delta >, x is-0.05 to 0.05, and Ln is one of Pr and Sm; and delta represents the non-stoichiometric ratio of oxygen in the material. According to the solid oxide electrolytic cell anode material, the potential during preparation of ethylene and ethane through coupling of carbon dioxide and methane oxide can be reduced, the selectivity of ethane and ethylene in oxidative coupling of methane can be improved on the basis of stoichiometric regulation and control on Mn, and the economical efficiency of a product on one side of an anode is improved.

The present invention relates to a low-CO2 adsorption heat activated carbon and a preparation method thereof, and belongs to the field of activated carbon technology. In order to solve the problem that the existing activated carbon has a high CO2 adsorption heat, which leads to excessively high regeneration energy consumption, the present invention provides a low-CO2 adsorption heat activated carbon and a preparation method thereof. By subjecting the initial activated carbon to high-temperature pyrolysis or catalytic graphitization, pyrolysis activated carbon or catalytic graphitized activated carbon is obtained, thereby achieving effective removal of heteroatoms such as nitrogen and oxygen functional groups in the activated carbon, greatly reducing the CO2 adsorption heat of the activated carbon, thereby reducing regeneration energy consumption and improving the operating economy of the CO2 adsorption system. The activated carbon preparation method provided by the present invention can flexibly select experimental methods to obtain the required activated carbon according to the demand for CO2 adsorption capacity and the demand for reducing CO2 adsorption heat, and the activated carbon preparation process of this technical route is simple and low-cost, and has good application prospects and industrialization potential.

There is a problem that conventionally known carbon dioxide absorption liquids solutions of using aqueous N,N,N′,N″,N″-pentamethyldiethylenetriamine will have a low carbon dioxide emission rate.A composition for carbon dioxide separation use is used which includes: an amine compound (A) represented by General Formula (1) or (2) as described in the specification; an amine compound (B) represented by General Formula (3) as described in the specification; and water, in which the composition for carbon dioxide separation use may further contain an amine compound (C) represented by General Formula (4) as described in the specification, and the number of moles of nitrogen atoms (nitrogen atoms of tertiary amino groups) contained in the amine compounds (A) and (C) is within a range of 1.0 to 8.0 times the number of moles of nitrogen atoms (nitrogen atoms of secondary amino groups) contained in the amine compound (B).

The invention provides a gasification method and device for coking fly ash solid waste. According to the device, a multi-reaction-zone coupling principle is adopted, a local high-temperature zone (gt, 2500 DEG C) is created in a gasification furnace through material blending and reactor structure design, the gasification reaction rate is increased, and the adaptability of gasification raw materials is improved; through partitioned combination of high-temperature gasification, slag solidification and chilling deslagging, the requirement of a traditional gasification furnace for the viscosity-temperature characteristic of slag is met, the raw material fluctuation resistance of the gasification furnace is improved, the slag blocking risk of a deslagging opening is reduced, and efficient gasification of unconventional carbon-containing raw materials of coking fly ash is achieved; and the CO-rich gasified gas and the H2-rich coke oven gas are further co-supplied and co-produced, the carbon-hydrogen ratio of the synthesis gas is flexibly adjusted, and cross-system hydrogen-carbon complementation between coal coking and coal gasification is realized, so that the energy efficiency of the coupling system is improved, and the emission of carbon dioxide is reduced.

The invention discloses a rectification device and method for separating and purifying normal propyl alcohol-isopropyl alcohol-tetrahydrofuran-water azeotrope, relates to the field of separation and purification, and provides a novel rectification tower which is internally provided with two vertical partition plates, ethylene oxide is used as a reaction solvent, ethylene glycol is used as an extraction agent, and the normal propyl alcohol-isopropyl alcohol-tetrahydrofuran-water azeotrope is separated and purified. The separation and purification of the n-propanol-isopropanol-tetrahydrofuran-water azeotrope are realized in the rectifying tower, the process flow is short, the separation effect is good, the thermal efficiency is high, the energy consumption is low, the emission of carbon dioxide is less, the equipment investment is less, the occupied area is small, the obtained n-propanol, isopropanol and tetrahydrofuran are high in purity, the practicability is strong, and the sustainable development is favorably realized. Compared with the traditional multi-stage extractive distillation, the rectifying tower disclosed by the invention has the advantages that the heat utilization efficiency is improved, the equipment investment is reduced by about 40-50%, the occupied area is reduced by about 50-60%, and the construction cost is effectively saved.

The invention relates to a carbon dioxide reliquefaction method used in the storage and transportation process, which comprises the following steps: monitoring the pressure in a carbon dioxide storage tank in real time, and when the pressure is higher than a preset threshold value, enabling gaseous carbon dioxide to enter a refrigerating unit through a gas connecting pipeline; the liquefied carbon dioxide is stored in a low-temperature container through a pipeline; when the liquid level in the carbon dioxide storage tank reaches a set value, liquefied carbon dioxide is pumped back to the carbon dioxide storage tank through a liquid spraying system; the supercooled carbon dioxide is directly sprayed into the carbon dioxide storage tank, so that the temperature and the pressure in the carbon dioxide storage tank are reduced, the safety of the carbon dioxide storage tank in the transportation process can be guaranteed, meanwhile, high efficiency, energy conservation, labor conservation and environmental protection are achieved, and the transportation cost is reduced. According to the method for re-liquefying and recovering the carbon dioxide overflowed by flash evaporation, the loss of the carbon dioxide in the transportation process is reduced, the transportation cost is reduced, zero leakage is realized, carbon dioxide leakage is avoided, and ship safety and environmental protection are guaranteed.