14 results about "Tar yield" patented technology

The present application belongs to the technical field of lignite treatment, and particularly relates to a method for improving lignite thermal conversion to produce high-value chemicals. In the present application, in the process of gasification, the catalytic active components in the carbide slag can have synergistic and catalytic effects with the minerals in the lignite. The treatment method provided by the present application can overcome the problems of low energy density, poor gasification efficiency, high tar yield and the like existing in the lignite gasification alone, effectively improves the carbon conversion rate per unit of coal, and greatly advances the reaction temperature zone. In the aspect of coal pyrolysis, the carbide slag can intervene in the pyrolysis reaction path, promote the cracking and conversion of macromolecular organic matter, and be helpful to the production of high-quality tar. The present application fully utilizes the catalysis of the carbide slag on the lignite for gasification or pyrolysis, effectively improves the carbon conversion rate per unit of coal, greatly advances the reaction temperature zone, and simultaneously can directionally regulate and control the production of high-value chemicals in the pyrolysis process, and produce high-quality tar.

The invention belongs to the technical field of lignite treatment, and particularly relates to a method for improving lignite thermal conversion to produce high-value chemicals. According to the invention, in the gasification process, catalytic active components in the carbide slag and mineral substances in the lignite can generate synergism and catalysis effects. The treatment method provided by the invention can overcome the problems of low energy density, poor gasification efficiency, high tar yield and the like existing in independent gasification of lignite, effectively improves the carbon conversion rate of unit coal, and greatly advances the reaction temperature zone. In the aspect of coal pyrolysis, the carbide slag can intervene in a pyrolysis reaction path, so that the cracking and conversion of macromolecular organic matters are promoted, and the production of high-quality tar is facilitated. According to the method, the carbide slag is fully utilized to catalyze the lignite for gasification or pyrolysis, the carbon conversion rate of unit coal is effectively improved, the reaction temperature zone is greatly advanced, and meanwhile, high-value chemicals and high-quality tar can be directionally regulated and produced in the pyrolysis process.

The invention discloses an oil-rich coal in-situ pyrolysis system and method for multi-fluid synergistic heat supply and coke suppression and oil increase. The system adopts an orthohexagonal underground pyrolysis network comprising a combustion input / output well, a heat injection well and a production well, in-situ controllable combustion is utilized to release heat, and high-temperature supercritical CO2 is coupled to perform convection heating on a coal seam; low-temperature supercritical CO2 is sprayed in an independent fluid channel of a production well and is in direct contact with a pyrolysis product for heat exchange, and a liquid collecting and heating pumping device at the bottom of the well is matched, so that secondary reaction of tar is effectively inhibited, and the flowability is improved; superheated steam pulse type injection is adopted, carbon deposition is removed under the action of a catalyst bed layer, coking is blocked, pores are dredged, and after pyrolysis is finished, steam is continuously injected to achieve gasification exploitation of residual semicoke. The system integrates the functions of combustion heat supply, supercritical CO2 heat carrying / shock cooling, steam gasification coke suppression, multi-stage waste heat recovery and the like, and the tar yield, quality and energy utilization efficiency of oil-rich coal in-situ mining are remarkably improved.

The present invention relates to the field of iron and steel metallurgy, and in particular to a method for improving the quality of sintered ore in the sintering production of large-proportion limonite. The method screens raw coal based on tar yield, carbon-oxygen ratio, oxygen-hydrogen ratio, thermal stability index, calorific value and mechanical strength as indicators; the screened raw coal is sent into a dry distillation furnace to be isolated from air and heated to cause a pyrolysis reaction of the coal, and the remaining solid produced during the dry distillation process is lignite; the obtained lignite is used as a raw material to sinter large-proportion limonite. The present invention comprehensively solves the problem of poor sintered ore quality in the existing large-proportion limonite sintering through innovative lignite directional control steps, as well as in-depth analysis and effective application of the heat transfer-reaction-mass transfer multi-process coupled sintering mechanism of lignite in the sintering process.

The invention provides a system and a method for coupling metal magnesium fuel energy storage with oil-rich coal in-situ pyrolysis. The system comprises an MgO electrolysis device, a magnesium powder storage device, an O2 storage tank, a first mixer, a gas burner, an Mg-H2O generator, an H2 storage tank, a steam injection boiler device, an injection well, an extraction well, an oil-gas separator, a tar storage tank and a combustible gas storage tank. The first output end of the MgO electrolysis device is connected with the magnesium powder storage device; the output end of the O2 storage tank is connected with the first mixer; the input end of the steam injection boiler device is connected with the gas burner, and the first output end of the steam injection boiler device is connected with the injection well; the input end of the oil-gas separator is connected with the extraction well; and the first output end of the oil-gas separator is connected with the tar storage tank. The method has the technical effects that the design is reasonable, the external source energy consumption and the carbon footprint of the pyrolysis of the oil-rich coal can be obviously reduced, and the yield and the quality of tar are synchronously improved.

The invention relates to a method for improving tar yield and quality by pyrolyzing lump coal through high-temperature hydrogen-rich flue gas and application. The process system comprises a coal pyrolysis unit (1), a gas-solid separation unit (2), an oil gas cooling unit (3), a gas combustion unit (4), a pyrolysis recycle gas compression unit (5) and a pyrolysis oil gas flow control unit (6). The method is characterized in that the flow of pyrolysis circulating gas is regulated and controlled through a pyrolysis circulating gas compression unit, the pyrolysis circulating gas is combusted with oxygen-enriched air in a gas combustion unit to generate high-temperature hydrogen-enriched flue gas, and the high-temperature hydrogen-enriched flue gas enters the bottom of a coal pyrolysis unit and is in reverse contact with lump coal in the coal pyrolysis unit for heat transfer, so that heat and hydrogen required by pyrolysis of the lump coal are provided; the proportion of pyrolysis oil gas 2 in total pyrolysis oil gas of the coal pyrolysis unit is regulated and controlled through a pyrolysis oil gas flow control unit at an outlet of the pyrolysis oil gas 2, so that the temperature of the upper part of the coal pyrolysis unit is controlled, and the retention time of tar in the reactor is reduced.

The invention relates to the technical field of petroleum geology application geophysical logging methods, in particular to a method for determining coal rock tar yield by using logging information, which comprises the following steps of: acquiring experimental measurement data such as coal core tar yield and the like and a logging curve value of a corresponding coal seam depth section; analyzing the correlation between the tar yield and the logging curve, and preferably selecting a sensitive logging curve reflecting the tar yield of the coal core; and performing multiple regression analysis on each tar yield of the coal core and the sensitive logging curve, and establishing a multiple linear regression model of the tar yield. According to the method for determining the tar yield of the coal seam by using the logging information, the tar yield of the coal cores in the same block only needs to be measured, the relational expression of the two data with strong correlation is solved by using the logging information, and the tar yield can be solved by substituting the logging curve value of the coal seam to be measured into the relational expression; the method can realize the capability of continuously evaluating different tar yields of the coal seam, makes up for insufficient coring, reduces the analysis cost, and improves the analysis efficiency.

The present invention relates to a coal and solid waste co-pyrolysis and gasification reaction device, method, and application. The device comprises a pyrolysis furnace, a stripping furnace, and a gasifier connected in sequence. Raw materials containing coal and solid waste enter the pyrolysis furnace to produce products including crude pyrolysis gas and crude semi-coke. The crude semi-coke enters the stripping furnace to produce replacement gas and activated semi-coke. The activated semi-coke enters the gasifier to produce synthesis gas, high-temperature semi-coke, and crude slag. Part of the high-temperature semi-coke is returned to the bottom of the pyrolysis furnace, and part of the synthesis gas is returned to the pyrolysis furnace as circulating synthesis gas. The reaction device and method of the present invention can be applied to the field of co-utilization of coal and solid waste, improving the carbon conversion rate and effective gas content. The carbon conversion rate reaches over 98%, effectively improving the tar yield and quality.

The present invention relates to the technical field of biomass gasification hydrogen production, and particularly relates to a process system for producing hydrogen by means of the segmented pyrolysis and catalytic gasification of biomass waste. The hydrogen production rate of a biomass gasification hydrogen production technology is low and makes it difficult to reach 700 mL / g of biomass or above. In order to solve the technical problem, the present invention provides the process system for producing hydrogen by means of the segmented pyrolysis and catalytic gasification of biomass waste. By means of graded and stepwise thermochemical conversion, using cheap aluminum smelting waste residue, pyrolysis semicoke and a carbon molecular sieve as catalysts, and catalyzing tar steam with the pyrolysis residue, the tar yield during the pyrolysis process is significantly reduced, and the hydrogen yield is improved. Catalyzing tar cracking with the aluminum smelting waste residue coupled with the molecular sieve improves the effect of catalyzing tar cracking hydrogen production by means of a cheap nickel-based catalyst. By means of the catalytic reforming of hydrocarbon gases with nickel loaded on the carbon molecular sieve, the hydrogen proportion reaches 70% or above, thereby achieving the purposes of energy conservation and reduction of biomass waste and the harmless resource utilization of aluminum smelting waste residue and pyrolysis residue.

This invention discloses a model verification system and method for catalytic removal of naphthalene from biomass tar during co-firing, relating to the field of coupled co-firing technology in thermal power plants. The system includes a feedstock supply unit, a reaction simulation unit, a product separation and detection unit, a parameter control unit, and a data processing unit. The feedstock supply unit precisely delivers biomass feedstock, catalyst, and carrier gas; the reaction simulation unit employs a three-stage heating structure and a detachable catalytic bed to simulate operating conditions under different reaction temperatures and catalyst types; the product separation and detection unit acquires key data such as tar yield, naphthalene content, and catalyst coking characteristics through multi-stage separation and precise detection; the parameter control unit automatically adjusts and stabilizes experimental parameters; and the data processing unit performs comparative analysis of experimental data and numerical simulation results. This invention also provides a corresponding model verification method, which achieves systematic verification of the catalytic removal model through steps such as setting operating conditions, data acquisition, simulation modeling, and comparative verification. This invention can simulate multi-variable coupled operating conditions, achieve precise multi-dimensional data acquisition and in-depth comparative analysis, significantly improving the accuracy and reliability of model verification, and is suitable for laboratory research and engineering technology verification.

The invention relates to the field of ferrous metallurgy, in particular to a method for improving the quality of sintered ore in large-proportion limonite sintering production. The method comprises the following steps: screening feed coal according to tar yield, carbon-oxygen ratio, oxygen-hydrogen ratio, thermal stability index, calorific value and mechanical strength as indexes; feeding the screened raw material coal into a dry distillation furnace, heating in an air-isolated manner, and carrying out pyrolytic reaction on the coal, wherein the residual solid generated in the dry distillation process is semi-coke; and sintering the large-proportion limonite by using the obtained semi-coke as a raw material. According to the method, through the innovative semi-coke directional regulation and control step and the deep analysis and effective application of a heat transfer-reaction-mass transfer multi-process coupling sintering mechanism of the semi-coke in the sintering process, the problem that the sinter quality is poor in existing large-proportion limonite sintering is comprehensively solved.

The invention relates to the field of coal processing and utilization, and discloses a coal pyrolysis tar yield measuring device and method.The measuring device comprises a reactor, a feeding assembly, a purging gas pipeline, a fluidizing gas pipeline, a gas-solid separator and a condensation filtering assembly, the fluidized gas pipeline is arranged to provide fluidized gas to the reactor to form a constant-temperature reaction area, the height of the constant-temperature reaction area is 10-20 cm, the feeding assembly is arranged to convey pulverized coal to the reactor through the feeding pipeline, the purging gas pipeline is arranged to provide purging gas to the feeding pipeline, and the purging gas pipeline is arranged to supply purging gas to the reactor. The gas-solid separator is configured to separate a gaseous product from a solid product. According to the technical scheme, the height of the constant-temperature reaction area formed by the fluidized heat carrier particles is reasonably designed, so that pulverized coal can be subjected to pyrolytic reaction more quickly, secondary cracking or condensation polymerization of tar is avoided or reduced, and the yield of the tar is increased.

The invention discloses a low-NOx-emission combustion device suitable for a boiler. The low-NOx-emission combustion device comprises a boiler hearth. The boiler furnace comprises a main combustion area, a reduction area and a burnout area which are sequentially arranged from bottom to top. A plurality of tar atomizing spray guns for spraying atomized tar are arranged on the furnace wall of the main combustion area / reduction area, and a plurality of pyrolysis gas nozzles for spraying pyrolysis gas are arranged on the furnace wall of the reduction area, or a plurality of tar pyrolysis gas nozzles for spraying tar-containing pyrolysis gas are arranged on the furnace wall of the main combustion area / reduction area. The tar is sprayed into the high-temperature and low-oxygen main combustion area, the tar and cracking components of the tar efficiently participate in the NOx conversion process, in-situ removal of NOx in the combustion process can be achieved, flue gas is used as fluidization and heat source gas of the pyrolyzing furnace, large-scale pyrolysis can be economically achieved, and the high tar yield is guaranteed.

The present invention relates to an oxygen carrier, and a preparation method therefor and the use thereof. The oxygen carrier of the present invention comprises a composite oxide of iron and strontium, wherein the molar ratio of strontium to iron in the oxygen carrier is (1.1-5):1. The oxygen carrier of the present invention has the advantages of a high carbon conversion rate, a high synthesis gas yield, a high CO selectivity and a low tar yield in the process of biomass gasification, and can be prepared by means of a high-temperature solid phase method; and the preparation method is simple, and can easily realize large-scale production.