11 results about "Coal conversion" patented technology

The present invention relates to the technical field of coal conversion, and discloses a coal quality-divided conversion co-production system and method, the system comprises: a pyrolysis unit for performing a pyrolysis reaction on coal and hydrogen; the purification and separation unit is used for purifying and separating the oil gas from the pyrolysis unit; the special oil product production unit is used for carrying out hydrofining reaction on the coal tar from the dust removal and separation unit and hydrogen to obtain a special oil product; a gasifying agent preheating unit; the gasification unit is used for carrying out gasification reaction on the gasification agent from the gasification agent preheating unit, the semicoke from the pyrolysis unit and the oil residue from the dust removal and separation unit to obtain synthesis gas; the synthesis gas sensible heat recovery unit is used for recovering sensible heat of synthesis gas and providing heat for the pyrolysis unit and / or the gasifying agent preheating unit; a water vapor shift unit; and a carbon capture unit. The system and the method can realize clean conversion of poly-generation coal with high efficiency and low carbon emission.

The invention discloses a vertical furnace system for pyrolysis of a pulverized coal rotary kiln, which belongs to the technical field of coal conversion and is characterized in that the tail end of the rotary kiln is sequentially connected with a vertical furnace, a cyclone dust collector, a high-temperature filter element dust collector and a hot blast stove; wherein the hot blast stove is connected with the vertical furnace, and the top of the vertical furnace is connected with the rotary kiln through a flue gas loop, so that a connecting loop of the vertical furnace and the rotary kiln is formed; according to the pulverized coal pyrolysis system and method, pulverized coal can be pyrolyzed efficiently, and the pulverized coal pyrolysis system and method have the beneficial effects that the process is simple and efficient, and the system is reliable and safe.

The application provides a coal chemical wastewater treatment system and a treatment method. The coal chemical wastewater treatment system comprises a pretreatment module, a first electrochemical precipitator, a hydrolysis acidification reactor, a nitrification-denitrification integrated reactor and a desalination module connected in sequence; the pretreatment module is used for removing oil impurities and solid impurities in wastewater; the hydrolysis acidification reactor is used for hydrolyzing first type molecular organic matters in wastewater into second type molecular organic matters, the diameter of the first type molecular organic matters being larger than that of the second type molecular organic matters; the nitrification-denitrification integrated reactor is used for removing part of COD in wastewater and performing denitrification treatment on the wastewater; and the desalination module is used for performing desalination treatment on the wastewater. The coal chemical wastewater treatment system can improve controllability and pertinence in the wastewater treatment process, greatly improve the volume load, reduce energy consumption, save land occupation, and has superior effluent indexes.

The invention relates to the technical field of energy chemical industry and coal conversion, and discloses a multi-nozzle opposed coal gasification and isothermal transformation coupling method which comprises the following steps: step 1, firstly, executing a multi-nozzle opposed coal gasification process, and mixing pulverized coal with the particle size of less than or equal to 0.1 mm with water according to a mass ratio of 1: (1.8-2.2) to prepare coal water slurry; through the coupling design of hedging impinging stream gasification and U-shaped pipe isothermal transformation, the carbon conversion rate and the CO conversion stability are greatly improved, and the service life of core equipment is prolonged. In the gasification stage, 4-6 opposed burners inject coal water slurry and oxygen into the gasification furnace to form a hedging impinging stream reaction zone, the mixing uniformity is improved to 95% or above, the high temperature of 1400-1600 DEG C and the high pressure of 6.0-7.5 MPa are matched, the carbon conversion rate breaks through 98%, and the residual carbon loss is reduced by 60%; meanwhile, the cooling water amount is adjusted through CO content feedback at an outlet, the CO conversion rate is stabilized at 98.5% or above, the service life of the catalyst is prolonged to 3-4 years, and the replacement frequency is reduced by 60%.

The present invention provides high-quality humic acid extracted from weathered coal, a preparation method thereof, and a method for co-producing high-humic acid organic fertilizer. The method comprises physical treatment of weathered coal, stacking, activation, dissolution, filtration, precipitation of humic acid from the extract, and production of high-humic acid organic fertilizer from the extraction residue. The present invention overcomes the technical difficulties in the prior art of humic acid extraction from weathered coal, such as the complex, time-consuming process with low yield, and the low comprehensive benefit of a single product. According to the characteristics of the weathered coal raw material, the yield of humic acid is improved through physical-chemical coupling reaction conversion, and a high-yield extraction of humic acid from weathered coal is achieved through a solid-phase reaction of stacking thermochemical reaction and oxidative activation to obtain humic acid. The residual humic acid that has been activated but not extracted is then compounded with aquaculture waste to achieve the combination of the residual humic acid from the weathered coal and the organic matter in the aquaculture waste, and the coupling of humic acid and organic matter, to obtain high-humic acid organic fertilizer, with diversified products, thereby maximizing the comprehensive economic benefits of weathered coal conversion.

This invention belongs to the field of efficient coal conversion and utilization technology, specifically a method for modifying coal using a solvothermal method and the modified coal. Coal is mixed with an organic solvent in a sealed container for heat treatment, followed by vacuum distillation to remove the solvent. After cooling, modified coal is obtained. During the heat treatment, solvent molecules penetrate and act on the macromolecular network of the coal, selectively breaking weak chemical bonds such as aliphatic side chains and ether bonds. This moderately dissociates and activates the inherent three- to five-ring aromatic clusters in the coal, forming a colloidal precursor rich in active small molecules. Then, direct vacuum distillation occurs, resulting in mild structural rearrangement and physical cross-linking, ultimately forming a uniform, dense, and highly adhesive solid modified coal product.

The application discloses a method for extracting germanium and rhenium from coal conversion ash. The method first separates the coal conversion ash by flotation to obtain carbon and tail ash; the tail ash is mixed with an auxiliary agent and subjected to thermal activation treatment within a set temperature range; after cooling, the mixture is subjected to water leaching and filtration to obtain a leaching solution containing germanium and rhenium; through extraction, evaporation and chemical treatment steps, germanium and rhenium are separated and purified, and finally high-purity germanium and rhenium products are obtained. The method improves the extraction efficiency of germanium and rhenium, the recovery rate of the germanium product reaches 88%, the purity is 96%, the recovery rate of the rhenium product reaches 92%, the purity is 98%, the process is environmentally friendly, the economic benefit is remarkable, and the comprehensive utilization of coal-based solid waste is realized.

The present invention provides a method and system for preparing a high-efficiency circulating hydrogen supply solvent for direct coal liquefaction. The circulating solvent prepared by the method of the present invention has high hydrogen supply performance, can significantly improve the coal conversion rate and oil yield in the direct coal liquefaction process, and reduce hydrogen consumption and gas yield. The preparation method comprises the following steps: (1) fractionating the direct coal liquefaction oil in a first fractionation tower; (2) subjecting the mixture obtained by mixing heavy distillate oil and a starting solvent to a first hydrogenation reaction in a first hydrogenation reactor, and sending the resulting product to a first separation unit for separation to obtain a first light distillate oil, a first middle distillate oil, and a first heavy distillate oil; (3) subjecting the mixture obtained by mixing the first heavy distillate oil and the middle distillate oil to a second hydrogenation reaction in a second hydrogenation reactor, and sending the resulting product to a second separation unit for separation to obtain a second heavy oil; (4) mixing the second heavy oil with the first middle distillate oil to obtain a circulating hydrogen supply solvent.

The invention belongs to the technical field of flotation impurity removal equipment, and discloses a flotation impurity removal device for converting power coal into coking coal, which is technically characterized by comprising an impurity removal box, a top plate is fixedly mounted at the top of the impurity removal box through a bracket, and a vertical cylinder is rotatably mounted between the top plate and the inner bottom wall of the impurity removal box; a plurality of groups of annularly distributed stirring rods are fixedly mounted on the surface of the vertical cylinder along different heights, a rotating assembly matched with the vertical cylinder is arranged on the surface of the top plate, a bubble generating mechanism is arranged on the surface of the vertical cylinder, and the bubble generating mechanism comprises an air guide assembly and a layering generating assembly; the layering generation assembly comprises a sealing part and a driving part, the layering generation assembly is matched with the air guide assembly, bubbles can be controlled to be sequentially generated on the surfaces of the stirring rods at different depths, the bubbles at the different depths move upwards in pulverized coal slurry, the bubbles can be in full contact with pulverized coal particles in the slurry, and the stirring efficiency is improved. And the adhesion effect of the bubbles on the pulverized coal particles is effectively improved.

The invention discloses a gasified slurry preheating device, and relates to the technical field of coal water slurry gasification, the gasified slurry preheating device comprises a preheating furnace, the bottom of the preheating furnace is provided with a coal slurry inlet and a coal slurry outlet, a plurality of preheating pipes are connected between the coal slurry inlet and the coal slurry outlet, the outer diameter of the contour of each preheating pipe is gradually reduced in the direction close to the axis of the preheating furnace, and the preheating pipes are coaxially embedded in a sleeving manner; a steam inlet and a condensate outlet are formed in the side wall of the preheating furnace, the steam inlet is used for conveying preheated steam to the preheating furnace, and the condensate outlet is used for discharging condensate water. And energy for producing fuel gas is additionally consumed, so that the water-coal conversion rate is reduced.

Hydrogen production methods combining an iodine looping cycle with a coal conversion process are described. A coal conversion process can include, but is not limited to, coal gasification, underground coal gasification, coal pyrolysis, coal liquification and coal coking.