6 results about "Tar yield" patented technology

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 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 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.