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11 results about "Refined coal" patented technology
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Refined coal is the product of the application of a coal-upgrading technology that removes moisture and certain pollutants from lower-rank coals such as sub-bituminous and lignite (brown) coals and raising their calorific values. Coal refining or upgrading technologies are typically pre-combustion treatments and/or processes that alter the characteristics of a coal before it is burned. The goals of pre-combustion coal-upgrading technologies are to increase efficiency and reduce emissions when coal is burned. Depending on the situation, pre-combustion technology can be used in place of or as a supplement to post-combustion technologies to control emissions from coal-fueled boilers. A primary benefit of refined coal is the capacity to reduce the net volume of carbon emissions that is currently emitted from power generators and would reduce the amount of emissions that is proposed to be managed via emerging carbon sequestration methodologies. Refined coal technologies have primarily been developed in the United States, several similar technologies have been researched, developed and tested in Victoria, Australia, including the Densified coal technology (Coldry Process) developed to alter the chemical bonds of brown coal to create a product that is cleaner, stable (not prone to spontaneous combustion), exportable and of sufficiently high calorific value to be a black coal equivalent.
Coal pitch-based supercapacitor carbon and preparation method and application thereof
The invention discloses coal pitch-based super capacitor carbon and a preparation method and application thereof, and the preparation method of the super capacitor carbon comprises the steps: dissolving coal liquefaction refined pitch in an organic solvent, and adding ZnCl2, KCl and potassium citrate to obtain a pitch solution containing an ionic hot molten salt activator; the preparation method comprises the following steps: soaking a biomass template in a dopamine aqueous solution, and then mixing with an asphalt solution to obtain a biomass template-asphalt compound; and oxidizing, carbonizing, activating, washing and drying the compound to obtain the capacitor carbon. And mixing and heating the capacitor carbon, a nitrogen source and a phosphorus source, and carrying out graphitization doping. The pitch-based super capacitor carbon with high specific surface area, excellent electrochemical performance and environmental protection advantages is prepared through a biomass template method, and the preparation process has great potential in the field of energy storage.
Owner:CCTEG CHINA COAL RES INST
Coal mine gas refined extraction system and using method
The invention provides a coal mine gas fine extraction system and a using method, and relates to the technical field of gas extraction treatment. The problems that the extraction rate of low-concentration gas is low, the impurity content is high, and the mixing precision is poor are solved. The system comprises a tree-shaped extraction pipe network, a spiral separation pipe, a washing device, a condenser, an adsorption tower, a membrane separation device and a dynamic and static coupling mixing system which are communicated in sequence. Directional drilling-hydraulic fracturing permeability increasing is adopted, and the low-concentration gas recovery rate is larger than or equal to 70%; multistage centrifugation, water washing, adsorption and membrane separation are combined, the removal rate of dust, H2S and CO2 is larger than or equal to 90%, and methane is purified to be larger than or equal to 95%; the static and dynamic mixing cavity is controlled by fuzzy PID closed loop, and the mixing proportion error is less than or equal to + / -1.5%. The system is modularized, explosion-proof, low in consumption and intelligent, and safe and efficient extraction and high-quality utilization of coal mine gas are achieved.
Owner:SHANDONG UNIV OF SCI & TECH
Pulverized coal refining device
The utility model discloses a pulverized coal refining device which comprises a machine body and a rotary screen drum installed in the machine body in a rotary mode, grinding balls are filled in the rotary screen drum, a discharging device is installed at the bottom of the machine body, a feeding device is installed on the left side of the machine body, the feeding device is inserted into the rotary screen drum in a penetrating mode, and the grinding balls are arranged on the rotary screen drum. A bottom plate is welded to the bottom of the machine body, and a driving device for driving the rotary screen drum to rotate is mounted at the top of the bottom plate; a cleaning device for cleaning the rotary screen drum is mounted at the top of the machine body; according to the device, by means of rotation of the rotary screen drum, the rotary screen drum is in active contact with the cleaning device, cleaning of the rotary screen drum is achieved, dredging of screen holes is guaranteed, refined pulverized coal particles can be smoothly leaked out of the screen holes, and the material stacking condition is avoided.
Owner:ZHEJIANG ANJI TIANZIHU COGENERATION CO LTD
Coal-based mesophase pitch and method for producing the same
PendingCN122104264AWorking-up pitch/asphalt/bitumen by distillationWorking-up pitch/asphalt/bitumen by selective extractionCoal measuresQuinoline
The present application provides a kind of coal-based mesophase pitch and its preparation method, belong to pitch preparation technical field.The preparation method includes the following steps: coal-based raw pitch is pretreated, and refined coal pitch is obtained;Distillation is carried out on refined coal pitch, and distillation coal pitch is obtained;Heat polycondensation reaction is carried out on distillation coal pitch, and coal-based mesophase pitch is obtained.The present application uses single coal-based raw pitch as raw material, with the help of the combination of pure physical purification of refining-distillation, cooperatively removes impurities and controls material composition, reduces the quinoline insoluble content of coal pitch to below 0.1wt%.On this basis, through non-catalytic heat polycondensation reaction, the mesophase conversion rate is significantly improved, and the performance consistency of the obtained product as carbon material precursor is improved.The process is simple, controllable, energy-saving and cost-effective, which provides a reliable technical path for the high-value utilization of coal tar pitch and the large-scale stable production of high-end carbon materials.
Owner:CHINA COAL NORTHWEST ENERGY CO LTD +2
A process for the purification of a fischer-tropsch synthesis oil
This disclosure relates to a method for refining Fischer-Tropsch synthetic oil. A mixed feedstock, consisting of coal-based Fischer-Tropsch mixed olefins, coal-based Fischer-Tropsch mixed heavy hydrocarbons, and coal-based Fischer-Tropsch wax from the Fischer-Tropsch synthesis reaction, is fed into a reaction unit for hydrogenation to obtain reaction products. These products are then fed into a hot high-pressure separator, a cold high-pressure separator, a hot low-pressure separator, and a cold low-pressure separator for gas-liquid two-phase separation. The resulting third and fourth liquid phases are fed into a fractionation unit for fractionation to obtain coal-based synthetic liquid wax, heavy hydrocarbons, and light hydrocarbons. The heavy hydrocarbons are then sent to a vacuum unit for separation to obtain heavy liquid paraffin, coal-based Fischer-Tropsch soft wax, and refined coal-based Fischer-Tropsch wax. The light hydrocarbons are then sent to a stabilization unit for pressure stabilization. This method removes oxygen-containing compounds and saturates olefins, thereby improving product stability and achieving separation and purification of the Fischer-Tropsch synthetic oil, resulting in a high-quality product.
Owner:INNER MONGOLIA YITAI CHEM CO LTD
High-chlorine coal washing heavy medium cyclone
The present application relates to high-chlorine coal washing technology field, a kind of high-chlorine coal washing and heavy medium cyclone is provided, with feed inlet, underflow port and overflow port, feed inlet is used to pass into high-chlorine coal and heavy medium, and heavy medium includes calcium hydroxide, cyclone includes: the hollow inside of refined coal baffle shell, it is arranged in cyclone interior, located at underflow port, the upper end surface of refined coal baffle shell has recess one;Cover lifting is arranged in recess one, cover has a plurality of through holes one on it, through hole one is configured to block heavy object and pass refined coal particles, cover sidewall also has a plurality of through holes two, through hole two is configured to allow heavy object to enter but not to pass through. Through the above technical scheme, the problem that the processing efficiency is not high and part of refined coal particles is mixed with heavy object and taken out underflow port, causing waste, is solved in the prior art that high-chlorine coal is gradually selected and dechlorinated.
Owner:HUANENG COAL TECH RES CO LTD +1
A fine coal blending device for gasification
This invention belongs to the technical field of coal blending equipment, specifically relating to a refined coal blending device for gasification, comprising: a raw coal precision feeding system, including multiple corresponding raw coal silos and a quantitative feeding component for quantitatively blending and outputting various raw coals; a coal conveying system, including a conveyor belt and a leveling unit, wherein the conveyor belt is horizontally positioned between the quantitative feeding component and the mixing system, and the leveling unit is positioned on the upper side of the conveyor belt for leveling the raw coal on the conveyor belt; an online detection system for acquiring coal quality data of the industrial composition, elemental composition, and ash chemical composition of each type of raw coal in the mixed raw coal on the conveyor belt; and a central control system for comparing the coal quality data acquired by the online detection system with a preset coal quality data range to control the coal output flow of each raw coal silo in the raw coal precision feeding system, thereby improving the coal blending accuracy and obtaining coal quality that meets the requirements for gasification.
Owner:ANHUI UNIV OF SCI & TECH
Distributed cache storage management system for coal transportation and washing data
PendingCN122132490AResource allocationDatabase distribution/replicationParallel computingData aggregator
This invention relates to the field of data management and distributed caching technology in the coal industry, particularly a distributed cache storage management system for coal transportation and washing data. The system executes the following steps: S1, binding production data to a unique batch identifier of incoming raw coal and a coal flow characteristic tag; S2, constructing a spatiotemporally coupled cache index to complete cache data addressing mapping; S3, aggregating and storing data to corresponding cache nodes to complete differentiated cache partition deployment; S4, outputting a priority scheduling strategy; S5, outputting a cross-network synchronization control strategy; S6, dynamically adjusting the lifecycle of corresponding batch cache data and outputting lifecycle configuration rules; S7, iteratively updating to adapt to on-site production needs. When quality problems such as excessive ash content in refined coal occur, the entire process data can be traced back through batch identifiers to quickly locate abnormal links. Simultaneously, it provides a precise data foundation for subsequent cache aggregation and hierarchical scheduling, significantly improving the refined management level of coal washing production.
Owner:SHANDONG ZHENGGUAN LOGISTICS SUPPLY CHAIN CO LTD
Coal-tar pitch-based supercapacitor carbon and preparation method and application thereof
This invention discloses a coal tar pitch-based supercapacitor carbon, its preparation method, and its application. The preparation method of the supercapacitor carbon includes: dissolving refined coal liquefaction pitch in an organic solvent, and adding ZnCl2, KCl, and potassium citrate to obtain a pitch solution containing an ionic molten salt activator; immersing a biomass template in a dopamine aqueous solution, and then mixing it with the pitch solution to obtain a biomass template-pitch composite; subjecting the composite to oxidation, carbonization, activation, washing, and drying to obtain the supercapacitor carbon; and then mixing the supercapacitor carbon with a nitrogen source and a phosphorus source and heating to perform graphitization doping, thus obtaining the final product. This invention prepares pitch pitch-based supercapacitor carbon with high specific surface area, excellent electrochemical performance, and environmental advantages through a biomass template method, demonstrating the great potential of this preparation process in the field of energy storage.
Owner:CCTEG CHINA COAL RES INST
Coal ash content alternating detection pretreatment device and method
The application discloses a kind of ash content of refined coal alternate detection pretreatment device and pretreatment method, it is related to ash content detection pretreatment technical field of refined coal.The ash content of refined coal alternate detection pretreatment device includes two-division classifier of division;Further include vertical feeding mechanism;The vertical feeding mechanism includes vertical screw conveyor and transition material guiding mechanism, vertical screw conveyor is used to the reserved coal material that two-division classifier bottom side discharges is transported to two-division classifier top.The application is formed by oblique material guiding box and electric control gate cooperation temporary storage reserved coal sample container, it is convenient to stir shaft to the reserved coal sample that two-division classifier bottom discharges needs to be mixed as a whole automatically, and cooperate vertical screw conveyor to transport again and automatically put into two-division classifier to the coal sample that remains to be reserved and carry out division, so repeatedly, can realize the automatic mixing division processing of each reserved sample, without manual repeated operation, improve processing efficiency and convenience.
Owner:YULIN SHENHUA ENERGY CO LTD
A method for preparing spinnable mesophase pitch by double thermal polycondensation-solvent extraction of coal pitch based on pyrolytic pitch evaluation
This invention belongs to the field of coal chemical technology and discloses a method for preparing spinnable mesophase pitch using a dual thermal polycondensation-solvent extraction process based on pyrolytic pitch evaluation. Coal tar pitch and other raw materials are subjected to solvent extraction to remove primary insolubles and ash, yielding a soluble solution. This solution is then subjected to atmospheric distillation to remove the solvent, resulting in refined coal tar pitch. The refined coal tar pitch is then subjected to heat treatment in a high-temperature, high-pressure reactor to obtain pyrolytic pitch. After property analysis of the pyrolytic pitch, a second thermal polycondensation is adaptively set and adjusted. The pyrolytic pitch is then separated by solvent extraction to obtain insolubles. These insolubles are then vacuum dried and subjected to a second heat treatment to obtain spinnable mesophase pitch. The dual thermal polycondensation-solvent extraction process based on pyrolytic pitch evaluation employed in this invention can significantly improve the anisotropy content of the mesophase pitch and result in a wide-area streamlined optical texture.
Owner:DALIAN UNIV OF TECH