1782 results about "Coal slurry" patented technology

In a coal-water slurry producing system, low grade coal is wet-ground to not greater than 3 mm in particle size to produce a ground coal slurry. An upgrading treatment is applied to the ground coal slurry under a pressurized hydrothermal atmosphere not less than 300 DEG C. to produce an upgraded coal slurry. The upgraded coal slurry is subjected to a dehydration treatment to produce an upgraded coal cake and a filtrate. A final coal-water slurry is produced from the upgraded coal cake. The filtrate is recycled for producing the ground coal slurry. A slurry transfer mechanism is provided in the coal-water slurry producing system for ensuring a stable transfer of the upgraded coal slurry from a high-pressure slurry vessel to a low-pressure slurry vessel.

The invention makes burnable renewal fuel (RF) briquettes from recovered coal from coal slurry ponds, biomass, and a binder. The briquettes may be augmented with one or more of recovered environmental burnable fraction from municipal solid waste (MSW), agricultural livestock waste, lumber processing residue, solid wood waste material, agricultural by-products and crops, and like burnable waste material. Accordingly, the method for making burnable renewal fuel (RF) briquettes includes the steps of recovering coal from coal slurry ponds; recovering biomass; adding a binder to said recovered coal and said biomass; and forming solid burnable RF fuel briquettes therefrom.

The invention provides a raw coal washing process capable of realizing non-polar ash conditioning. The process comprises the following steps: a, desliming and screening the part of raw coal with granularity less than 50 to 100mm; b, carrying out single stage jigging separation on screen products on a desliming screen; c, crushing lump coal obtained from the step b, namely screen products on an oscillating screen, by a crushing machine; d, feeding the crushed products from the step c into a three-product heavy medium cyclone for separation; e, respectively treating underflows and overflows obtained from a hydroclone in the step c; f, carrying out TBS separation or centrifugal dehydration treatment on the underflows of the hydroclone from the step e; g, respectively carrying out primary medium removal on clean coal, middlings coal and gangue obtained from the step d; h, respectively carrying out secondary medium removal and dehydration on the three products from the step g; and i, carrying out magnetic separation on undersize dilute medium obtained by secondary medium removal on the coal gangue in the clean coal in the step h, feeding the separated magnetite powder into a qualified medium tank, collecting residues, and carrying out coal slurry concentration.

The invention discloses a plural muzzles coal water slurry or fine coal gasification furnace used for gasifying coal water slurry or fine coal. The gasification room is made up of case, process muzzle room, process muzzle, preheating muzzle room, and preheating muzzle. The case has firebricks in it and washing cooling room is made up of chilling circle, down take, vesicle breaking stick and roughing slag outlet. The transforming ratio of the furnace is over 98%, and is especially suited for large scale gasification produce technology that produces 3000-5000T/day.

The invention discloses a water coal slurry preparing method and particularly discloses a method for preparing high-concentration water coal slurry by using low-rank coal, such as brown coal. The water coal slurry is especially suitable as water coal slurry for gasification. The water coal slurry preparing method sequentially comprises the following steps of 1 smashing and drying coal, 2 extruding smashed and dried coal so as to destroy and/or seal at least one part of a pore structure of the coal and reduce water absorption of pores formed in the coal, 3 adopting a wet method or a dry method to grind the extruded coal and preparing the extruded coal into the water coal slurry, wherein a dispersing agent is added into the coal or the water coal slurry at a grinding stage or a water coal slurry preparing stage.

The invention relates to a coal direct liquefaction method. It includes the following steps: mixing coal slurry which is made up of coal dust, hydrogenation cycle solvent, and iron catalyst with freshness or cycle hydrogen; reacting by the first and second reactor; sending the product from the second reactor to high temperature separator to separate; the weight flow ratio of the recycle and freshness materials is 2-20. The method can reduce hydrogen consumption and gas yield.

The invention discloses high-density sludge slurry and preparing method, which comprises the following parts: 100-200wt% coal powder, 10-50wt% sludge with water, 10-100wt% water, 1-5wt% water, 1-5wt% addictive and 1-5wt% sludge modifying agent.

A combined cycle system based on coal gasification and methanation gas-steam and a technique thereof, wherein, the method comprises the following steps: oxygen produced by an air separation unit and coal powder or water-coal-slurry are sent into coal gasification equipment, the produced crude gasification gas is sent to a carbon monoxide sulfur-tolerant shift reactor to adjust the ratio of hydrogen and carbon after the sensible heat recollecting, and is then sent into sulfur-tolerant methanation reactor to produce methane and carbon dioxide, then the reaction product is sent into desulfurization and decarbonization equipment so that element sulfur can be recovered and carbon dioxide can be separated so as to obtain substitute natural gas with high content of methane, part of which is sent to the gas-steam combined cycle equipment while the other part is sent to a urban gas system. The enriched CO2 density of the system can reach 50 to 60 percent, technical probability is provided for reasonably realizing low-energy-consumption reduced exhaust of CO2, no change needs to be done with gas turbines, each chemical unit operates according to established rated condition and needs not to change load owing to power conditioning so as to improve the economy of the operation of power plants; compared with the prior art, the energy utilization efficiency of the whole system is improved so as to realize the efficient clean utilization of coal.

The invention relates to a method for directly liquefying coals with a function of maximizing utilization of liquefied residues. The method comprises the following technical steps: preparing coal paste; carrying out hydrotreating and liquefaction on the coal paste; carrying out oil separation treatment on the obtained oil product; carrying out upgrading and hydrotreating on the obtained product; carrying out hot extraction on the residues and then carrying out solid-liquid separation on the residues; and recovering the solvent; and carrying out hydrotreating treatment on the mixture of heavy oils and asphalt materials so as to obtain the final product, then taking the heavy oils as recycled solvent to prepare the coal paste, and the like. The method provided by the invention has the advantages that because of organically combining the liquefaction process and the residue extraction, the utilization of liquefied residues is maximized, the conversion rate of coal is improved, the yieldsof light and middle oils subjected to coal liquefaction are improved by 10 to 60 percent, and the quality of oil is improved, thereby greatly enhancing the economic benefits of direct coal liquefaction plants and improving environment protection; and the method provided by the invention has important economic and social significances, and can widely be applied to the field of coal direct liquefaction.

The invention provides a water-coal-slurry additive and a preparation method thereof. The additive is compounded by anionic surfactant naphthalene sulfonic acid formaldehyde condensation product sodium salt, lignosulphonate and non-ionic surfactant alkylphenol polyethenoxy ether (methyl) acrylic ester according to mass ratio of 8:1:1 to 1:8:1. The invention uses the naphthalene sulfonic acid formaldehyde condensation product sodium salt, lignosulphonate and alkylphenol polyethenoxy ether (methyl) acrylic ester in the preparation technology of water-coal-slurry, and the additive has wide adaptability to coal, in particular to coal with low degree of metamorphism. When ternary compound additive reaches 0.1-1wt percent of the weight (dry basis) of the coal, the water-coal-slurry with the content of coal dust being 62-70wt percent can be prepared. The slurry has good fluidity, lower apparent viscosity and favorable steady state stability. The ternary compound additive is simple in production process, excellent in performance and wide in the range of applicable coal.

The invention provides a preparation method of a high-chrome brick, belonging to the field of fireproof material. The high-chrome brick is a key lining material of a water-coal-slurry gasification furnace. Compared with the prior high-chrome brick product, the invention does not influence the apparent porosity, the breaking strength and the thermal shock resistance of the prior high-chrome brick and can obviously enhance the coal cinder permeability resistance.

The invention discloses a coal water slurry additive and a preparation method and application thereof. The method is characterized in that the coal tar fraction wash oil is taken as the starting material, carries out sulfonation reaction with a sulfonating agent and then carries out polycondensation reaction with aminobenzene sulfonate, phenols and formaldehyde; and neutralization is carried out after reaction is completed. The method can greatly lower the production cost, and the obtained additive has the advantages of small mixing amount, excellent dispersibility, good slurry forming ability and stability and reduction of the stabilizing agent in the coal water slurry. The additive can not only be independently used for preparing the coal water slurry, but also be used by being compounded with other types of additives, such as naphthalene sulfonate-formaldehyde condensates, polycarboxylic acid additives or lignosulfonate and other anionic surfactants and synthesize the coal water slurry suitable for different types of coal by adjusting the production conditions. The coal water slurry prepared by the additive has the solid content between 63% and 70% and is easy to flow and clean. The viscosity of the coal water slurry is controlled below 1200mPa.s at the shearing rate of 100s<-1>.

The invention relates to a method for processing coal and petroleum together and comprises the following steps: (1) coal power and solvent oil are prepared into coal slurry; (2) the coal slurry is done with hydrogenation reaction and lytic reaction; (3) petroleum products are done with the hydrogenation reaction after the products in the step (2) are done with solid-removing; (4) fraction with the temperature of 350-520 DEG C in the fraction of the step (3) products is taken as the solvent oil circularly; wherein, the solvent oil of the step (1) further comprises residual oil from the petroleum and the naphthenic base residual oil is the best. By adopting the method of the invention, the residual oil can be transformed fully, the density of the coal slurry keeps high and the fuel production rate of high quality engines can be improved.

The invention provides a process nozzle and a system for gasifying water coal slurry. The process nozzle comprises a first oxygen channel, a water coal slurry channel, a second oxygen channel, a first cooling water jacket and a cooling water coil, wherein the first oxygen channel comprises a first oxygen channel inlet and a first oxygen channel outlet; the water coal slurry channel comprises at least one water coal slurry channel inlet and a water coal slurry channel outlet; the second oxygen channel comprises a second oxygen channel inlet and a second oxygen channel outlet; the first cooling water jacket comprises a first cooling water jacket inlet and a first cooling water jacket outlet; and the cooling water coil comprises a cooling water coil inlet and a cooling water coil outlet. The process nozzle is characterized in that: the first oxygen channel is positioned at the central position of the process nozzle; the water coal slurry channel is positioned between the first oxygen channel and the second oxygen channel and surrounds the periphery of the first oxygen channel; and the second oxygen channel surrounds the periphery of the water coal slurry channel. The process nozzle reduces the length of combustion flame more effectively, reduces the ablation of flame on a refractory brick, promotes the mixing and atomization of water coal slurry and oxygen and improves gasification efficiency.

The invention relates to process and equipment for improving the quality of coal slurry and lignite through drying the same. The process comprises the following steps: (1) the coal slurry and the lignite are predried and then quantitatively fed to a drying system; (2) the coal slurry and the lignite are dried to be improved in quality by a material drying system; and (3) products are produced from the dried coal slurry and lignite of improved quality. The coal slurry and the lignite are dried and dewatered according to the physical and chemical properties of the same and the coal slurry and the lignite can not adhered to the wall of a cylinder of the equipment and can be cleaned automatically; the equipment is arranged integrally lineally on a plane so that the height of a factory building is lowered and the investment on the equipment is reduced by half compared with investment on the equipment arranged in a laminated mode; in addition, the equipment integrates feeing equipment, drying equipment and discharging equipment, has good sealing performance and high thermal efficiency which is increased to over 70 percent from the original 30-40 percent, saves energy to be consumed by one third, is environmentally friendly, can efficiently dewater the coal slurry and the lignite to improve the quality thereof and can be used safely and reliably so as to obtain obvious economic benefits.

The invention relates to a method for modifying lignite, belonging to the technical field of coal processing. In the method, the lignite is broken, sent into a coal mill, and is ground into coal pulp after water is added. Due to high content of internal water of the lignite, the concentration of the water-coal-slurry is relatively low, generally 30-55%. Modified water-coal-slurry is obtained after treatment under high temperature and pressure, wherein the internal water of lignite particles in the modified water-coal-slurry is reduced, and the water used for lubrication among the particles is more than needed water content of the water-coal-slurry. Measure of settlement or/and other specific measure, is/are needed to separate the excess water, and the concentration of the water-coal-slurry is increased from 30-50% to 50-70%, thereby increasing the calorific value of the lignite.

The invention discloses a straw pulp papermaking black liquor water-coal slurry dispersant and a preparation method thereof. The prescription of the water-coal slurry dispersant is counted by mass portion and includes 20 portions of condensed straw pulp papermaking black liquor of 50 to 60 percent; 25 to 50 portions of aldehydes, 20 to 60 portions of carbonyl compounds and 25 to 50 portions of sulfonating agents. The preparation method thereof is to prepare the water-coal slurry dispersant by carrying out graft sulfonation and polycondensation on the condensed straw pulp papermaking black liquor, the aldehydes, the carbonyl compounds and a sulfonating agent. The materials of the invention have abundant sources and low cost; the production cost is low; the water-coal slurry dispersant prepared by the invention has excellent water solubility and surface activity as well as excellent slurry preparing performance to the water-coal slurry under a lower addition; the dispersing viscosity reduction performance of the water-coal slurry dispersant is far superior to lignin sulfonate; aiming at different coal varieties, the water-coal slurry dispersant achieves or exceeds the efficiency of naphthyl sulfonate formaldehyde condensate; besides, the anti-shearing performance of a slurry body is excellent; the application range to the coal varieties is broad; the water-coal slurry dispersant is novel, effective and environment-friendly.

The invention relates to a preparation method of an alkali lignin modified polycarboxylic acid-type high-efficiency coal water slurry dispersant. The method comprises the steps: at the temperature of 50-80 DEG C, carrying out a copolymerization reaction of a polyoxyethylene ether macromonomer, an unsaturated carboxylic acid monomer, an unsaturated sulfonate monomer and an initiator for 2-3 h in an aqueous solution, adjusting the temperature to 30-50 DEG C, adding epoxy chloropropane, carrying out a reaction for 0.5-1 h, adding an alkaline regulator, adjusting the pH value to 10-12, adding an alkali lignin solution with the mass concentration of 20-50%, adjusting the reaction temperature to 60-80 DEG C, dropwise adding a composite initiator aqueous solution with the mass concentration of 2%, carrying out a reaction for 1-3 h, and thus obtaining a liquid product. The product has the dispersion viscosity reduction performance on coal water slurry superior to that of a naphthalenesulfonate formaldehyde condensation compound, and has good dispersion stability on coal slurry; and while original dispersive ability and other characteristics of the polycarboxylic acid-type dispersant are maintained, the production cost is reduced, and the usage amount of non-renewable resources and toxic materials is lowered.