30 results about "Coal-water slurry fuel" patented technology

A water-coal slurry boost feeding system consists of a feeding unit, an outputting the slurry to the nozzle, a boosting device between them. The boosting device consists of a boost-feeding tank, a high pressure compressed gas cylinder connected with the boost feeding tank and an air compressor. Furthermore, two or more boost feeding tanks are connected in parallel with their outlets connected with the nozzle in parallel either. A low-pressure slurry-feeding pump can be used to replace the high pressure one and to have multiple boost-feeding tanks in parallel to boost in turn, so that it prevents the high pressure slurry-feeding pump from wear-out easily, lower cost and works normally long and continuously.

The invention discloses a coal-water slurry fuel and a preparation method thereof. The coal-water slurry fuel includes components of charcoal, water and additives, wherein the additives comprise a dispersant and a stabilizing agent. The preparation method for the coal-water slurry fuel comprises a first step of performing hydro-thermal charing to the raw material biomass to get a mixture of the charcoal and water, and a second step of adding the additives to the mixture of the charcoal and water to obtain a crude product of the coal-water slurry fuel. According to the invention, the biomass, especially the agriculture residue, is used as a raw material to preparing the novel coal-water fuel which has the properties of environmental protection, high caloric value, and large caloric power. The preparation method for the fuel is low in energy consumption, economical and cheap, and easy for operation. The coal-water slurry product has low sulfur content, and has the advantages of few black smoke, big fire, full burning, no flying ash, clean burning, etc. in use.

The invention relates to a pressure gasification process for simultaneously gasifying powdered coal and coal water slurry. The pressure gasification process is characterized in that a purpose-made gasification furnace is used, the gasification furnace is provided with a purpose-made powdered coal burner and a start-up burner and capable of simultaneously processing the coal water slurry and the powdered coal; gasification comprises the following steps of carrying out ignition start-up, igniting the powdered coal burner, increasing the temperature and pressure of the gasification furnace and a carbon washing tower, igniting a coal water slurry burner, increasing the pressure inside a gasification chamber, and controlling continuous gasification under a specific reaction condition. The pressure gasification process disclosed by the invention can be used for solving the problems of low effective component, high requirement on the quality of coal fed into the furnace, short life of the coal water slurry burner, short operation time of a single furnace, short life of a refractory brick, low coal slurry concentration and the like of a synthetic gas obtained through the traditional coal water slurry and solving the problems of large investment, complex equipment, high comprehensive energy consumption and the like of the traditional powdered coal gasification process.

The invention discloses an in-furnace denitrification coal water slurry making and combusting system integrated method and equipment. The method comprises the following steps: on the basis of the traditional slurry making process, adding a denitrification reducing agent, and preparing coal water slurry fuel containing the denitrification reducing agent; spraying the coal water slurry fuel into a boiler for burning, controlling the combustion temperature of the hearth to be stabilized in an optima reduction reaction temperature range and controlling the oxygen content of the flue gas, so that high-efficiency low-cost in-furnace SNCR denitrification of the coal water slurry is realized. The whole device comprises a coal water slurry combustion boiler, wherein the coal water slurry combustion boiler adopts the design of a primary combustion chamber and a secondary combustion chamber and is respectively provided with an axial cyclone primary combustor and a secondary combustor; a fire barrier is arranged at the tail of the primary combustion chamber, an air door is arranged below the primary combustion chamber, the rear upper part of the primary combustion chamber is connected with a dust remover through a pipeline, and the combusted smoke dust is discharged through an induced draft fan connected with the dust remover; and the axial cyclone primary combustor and the secondary combustor are respectively connected with a coal water slurry tank through a screw pump via pipelines, and are also respectively connected with an air compressor at the coal water slurry inlet through pipelines.

The invention discloses a coal water slurry flame-free oxygen-enriched combustion system. The system comprises a hearth, a high-speed atomization combustor, a slurry supply system, an oxygen supply system, a flue gas circulating system and a flue gas discharging and recycling system. The high-speed atomization combustor comprises a primary air nozzle, a secondary air nozzle and a coal water slurry atomization nozzle; the slurry supply system comprises a slurry storage tank, a slurry conveying pump, a stirring filter and a slurry supply pump; the oxygen supply system comprises an oxygen tank, a gas heater and a gas pressurizing pump; the flue gas circulating system comprises a flue gas heat exchanger, a dust remover, a circulating draught fan and a condenser; and the flue gas discharging and recycling system comprises a CO2 compression and storage device and a chimney. According to a coal water slurry flame-free oxygen-enriched combustion technology provided by the invention, oxygen is pressurized and heated and is mixed with circulating flue gas, and mixed gas is sprayed into a furnace to form volume combustion; coal water slurry is subjected to heat exchange through the flue gas heat exchanger, so that the initial temperature is improved and ignition heat is reduced; and the problems of a current coal water slurry boiler that the combustion efficiency is relatively low, the emission of NOx is high and the capturing cost of CO2 is high and the like can be solved.

The invention discloses pressurization slurry supply system and method for coal-water slurry fuel. The pressurization slurry supply system for coal-water slurry fuel comprises an air compressor, a balance tank, a slurry supply tank connected in turn, the slurry supply tank is provided with a pressure meter, also an electric control box and a frequency convertor, signal of the pressure meter is inputted into the electrical control box which outputs frequency signal to the frequency convertor, the frequency signal controls rotation speed of the air compressor. The pressurization slurry supply method for coal-water slurry fuel comprises: driving the slurry tank to transfer high-pressure water-coal slurry by pressurizing air, altering frequency of the input apparatus of pressurizing the air to adjust the pressure of inputted pressurized air. Because the supplied slurry is determined by the pressurized air in the slurry supply tank, the pressure of the pressurized air is controlled by the frequency convertor, such that the slurry supply amount is adjusted by controlling the frequency convertor with the electrical control box, thus the equipment abrasion is reduce because screw pumps are unnecessary, slurry supply is stable, energy consumption cost is reduced thereby being convenient for chief stoker worker to operate.

The invention relates to the technical field of steam injection boilers for heavy oil wells in oilfields, in particular to a water-coal-slurry steam injection boiler in oilfields. The water-coal-slurry steam injection boiler comprises a boiler body, an upper water cooling wall, a lower water cooling wall, a superheater and an air preheater, an inverted-U-shaped flue is arranged in the boiler body and comprises a left vertical flue body, an upper horizontal flue body and a right vertical flue body, and a left flue slag-drip opening is formed in the bottom of the boiler body at the lower end of the left vertical flue body. The water-coal-slurry steam injection boiler has the advantages that the water-coal-slurry steam injection boiler is reasonable and compact in structure and convenient to use; a combustor in the steam injection boiler takes water coal slurry as fuel, and air is preheated by the air preheater and then is delivered to the water-coal-slurry combustor, so that flame extinguishing caused by low air temperatures is avoided, and reliability and stability in combustion are improved; combustion wastes can be discharged via the slag-drip opening, long-term continuous running and substituting the water coal slurry fuel for natural gas fuel can be achieved, and accordingly clean combustion, energy saving and emission reduction are achieved; the steam injection boiler is high in heat utilization ratio and convenient to move and transport.

The invention discloses coal water slurry fuel cleaning warm air furnace. It includes furnace body. The furnace body includes furnace chamber, dust guide plate, furnace mantle, dust collecting bucket, and air blower. The bottom end of the furnace chamber has many coal water slurry jets. The invention also has ash settler. The furnace chamber is cone. And its bottom end is connected to ash collecting bucket. Its top end is connected to ash guide plate. The ash guide plate is connected to the furnace mantle. It is connected to the ash setter. The air blower is connected to the cone furnace chamber. Because of adopting cone furnace body, ash guide plate, and ash setter, the invention can make the fuel burn more completely, dust much less. And its reliability is high. It can be used in the place which needs cleaning warm air.

The present invention is coal water mixture layer combustion method and apparatus. The coal water mixture layer combustion process includes evaporating partial water in coal water mixture by using the heat of combusting apparatus to form coal in hard colloid state, forming, and layer combustion in movable combustion bed inside combustor. The coal in hard colloid state may have its water further evaporated in the movable combustion bed to form puffed briquette for full combustion. The layer combustion apparatus includes coal water mixture supplying unit connected to the coal water mixture pipe, coal water mixture throwing unit including motor and drying and forming pusher, ignitor, and hearth with chain grating and air distributing below it. The present invention can realize high temperature combustion, and has simple structure, high heat efficiency, convenient output regulation, low cost and other advantages.

The invention discloses waste metal processing liquid coal water slurry fuel which comprises a waste metal processing liquid, coal water slurry as well as a dispersing agent and a coupling agent, wherein the waste metal processing liquid, the coal water slurry, the dispersing agent and the coupling agent are mixed up to prepare a coal water slurry mixture applicable to combustion. Therefore, the waste metal processing liquid can be effectively treated, the heat amount of the coal water slurry is improved, a good combustion property is achieved, the energy waste is effectively avoided, the problem about stability of a conventional organic waste liquid coal water slurry product is substantially solved, good flowbility is achieved, and the waste metal processing liquid coal water slurry fuel is easy to load, unload, store, convey in pipelines, combust in atomization spaces and the like.

The invention discloses a low-energy coal water slurry gasification system. The system comprises a coal storage bucket, the discharge port of the coal storage bucket is connected with a coal weighingfeeder, the coal weighing feeder is connected with the inlet of a coal mill, the coal mill is connected with a mill discharge tank, the outlet of the mill discharge tank is connected with a mill discharge tank pump, the mill discharge tank pump is connected with a coal slurry tank, the coal slurry tank is connected with a coal slurry feeding pump, the coal slurry feeding pump is connected with a gasification furnace through a coal slurry conveying tube, the coal slurry conveying tube is provided with a heating device, and the coal slurry conveying tube is further provided with a temperature detecting device. The invention also discloses a coal water slurry heating method. A coal water slurry in the coal slurry conveying tube can be heated, and the temperature of the coal water slurry in the conveying tube can be kept within a certain temperature range, so the coal consumption and the oxygen consumption are reduced, and the discharge amount of carbon dioxide is reduced.

The invention provides a coal water slurry gasification furnace for gasifying coal water slurry, which comprises a combustion chamber and a chilling chamber, and is characterized in that: the combustion chamber further comprises a quasi-elliptic large-diameter combustion chamber shell, at least two coal water slurry and oxygen three-channel process nozzle chambers which are symmetrically arrangedat the large diameter of the combustion chamber shell and slightly incline downwards, at least two coal water slurry and oxygen three-channel nozzles which slightly incline downwards and are detachably arranged in each coal water slurry and oxygen three-channel process nozzle chamber and of which the openings face the inside of the combustion chamber, a fireproof brick which is lined in the combustion shell, at least two oxygen nozzle chambers which are positioned at the periphery below each coal water slurry and oxygen three-channel process nozzle chamber and incline upwards, at least two oxygen nozzles which incline upwards and are detachably arranged in each oxygen nozzle chamber and of which the openings face the inside of the combustion chamber, and a combustion chamber slag hole which is formed at the bottom of the combustion chamber, wherein the chilling chamber is arranged on the lower part of the combustion chamber and below the combustion chamber slag hole.

The invention relates to a coal water slurry low-concentration oxygen enrichment fluidization suspension combustion method and boiler device. Zeolite molecular sieve oxygen enrichment devices are adopted to manufacture 24 to 30 percent of low-concentration oxygen enrichment air, the air is heated through an air preheater, primary air, secondary air and graining air pass through a fluidized bed, a secondary air opening and a coal water slurry granulator respectively to enter a combustion chamber, fluidization suspension combustion is achieved, the ignition and combustion condition of the coal water slurry boiler is improved, the ignition temperature of fuel is reduced, the combustion temperature, the combustion rate and the combustion-off rate are improved, the ignition and combustion stability of the fuel is improved, the adaption range of the coal water slurry boiler to the coal water slurry fuel is widened, and the boiler can be suitable for combusting coal water slurry made of inferior coal and also suitable for combusting sludge-coal blending coal water slurry fuel and sludge-coal slurry mixing coal water slurry fuel. The fuel cost and the production cost are reduced, the significant economic value is achieved, and the great social significance in improving the environment is achieved.