38results about How to "Avoid coke clogging" patented technology

The invention discloses a liquid addition and atomization device for a mine nitrogen-filling process. A flow-guide atomization device is arranged at the front end of a barrel body of the liquid addition and atomization device. A reducing gas-guide channel is reserved in the interior of the flow-guide atomization device. A bypass channel is arranged between the exterior of the flow-guide atomization device and the barrel body. A flow inlet channel is arranged on a lateral side of the flow-guide atomization device, and is communicated with a liquid-guide groove. A Venturi mixer is arranged at the rear end of the barrel body; and an injection orifice of the flow-guide atomization device is opposite to a mixture channel of the Venturi mixer. The liquid addition and atomization device is simple in structure, large in atomization amount, small in occupied space, flexible in movement, convenient to assemble, capable of effectively preventing blocking and working continuously, suitable for viscous liquid, free of electric elements, safe, reliable, and wide in practicability, is applicable to fire preventing and suppression in gob area of a mine or a closed space, and especially is applicable to adding fire-proof inhibitor solution in a mine nitrogen-filling process for fire preventing and suppression.

The invention provides a scraper rectifying column and process for refining adiponitrile. The scraper rectifying column comprises a column body and a liquid blanking pipe, as well as a scraper evaporator, a material circulating hole, a liquid phase outlet and a circulating pump, wherein the tower body internally comprises a filler layer and a plate type layer; the scraper evaporator is mounted at the outer part of the column body in a sealing manner and below the last column plate of the plate type layer; the material circulating hole is formed in the plate type layer and outside the column body; the liquid phase outlet connected with the material circulating hole through the circulating pump is formed in the bottom part of the tower body. The scraper rectifying column and process for refining adiponitrile have the beneficial effects that a special column structure is adopted, adiponitrile is separated from other dissolved foreign matters by adopting a crystal separation method, and thus the adiponitrile product can be recovered to the maximum while high-purity adiponitrile products are obtained, the problem of coking and blocking at the bottom part of a traditional rectifying column can be effectively solved, the purity of the product is improved, and the adiponitrile products can be recovered to the maximum.

The prevent invention discloses a combustion chamber thermal protection wall structure utilizing fuel automatic suction transpiration cooling. The combustion chamber thermal protection wall structurecomprises a high-temperature resistant outer wall layer, a foam layer and a porous layer which are sequentially arranged from outside to inside, wherein one side of the foam layer is provided with a fuel inlet that is connected to an external oil tank through a fuel pipeline. According to the invention, capillary force of the fuel in a porous structure is used as the driving force to realize fuelautomatic suction transpiration cooling; liquid fuel is used as a coolant, and the boiling point of the fuel is higher than that of water and lower than a coking temperature, thus avoiding coking blockage in the porous layer; the fuel performs convection heat exchange and is vaporized in the porous layer, thus a large amount of heat is absorbed, and the temperature of the wall of a combustion chamber is reduced; and the fuel after heat exchange can penetrate into the interior of the combustion chamber from the porous layer to participate in combustion and provide power, and after phase changevaporization, fuel oil vapor can form a film boundary layer on the inner surface of the thermal protection wall structure to block the heat transfer from a high-speed and high-temperature mainstream to the wall of the combustion chamber, so that the cooling effect is efficient and stable, and the applicability is high.

The invention relates to a high-efficiency cyclone type biomass powder combustor used for a boiler and a kiln. The combustor is composed of a water cooling sleeve, an end cover and the like. No hole that disturbs rotational flow is arranged between two ends of a cyclone combusting chamber. Biomass powder is put into the combustion chamber through a feeding hole and dispersed and pushed by cyclone of a cyclone hole so that wall-attached combustion and floating combustion are achieved. Raging fire erupts out of a fire and air hole. Ash is pulled out from an ash outlet hole. Coal particles are carbonized to be ash in a carbonization pool. A water exiting pipe, an air exhausting pipe, a water entering pipe, a sewage draining pipe and a water temperature sensor penetrate into the water cooling sleeve. The water cooling sleeve is used for regulating furnace temperature, recycling heat and safety protection. An igniter starts a combustion process. Combustion situations are observed from a fire observation hole. A safety valve ensures safety. A furnace temperature sensor detects furnace temperature. The problems that a rotation flow field is disturbed due to blowing-in from multiple air holes, bunkers are not fully combusted; slag short out and escaping happen, residues are condensed and formed at the air holes and the problems of coal particle coking, insufficient combustion and dust pollution caused by material particles, furnace temperature, flow speed, communication of the feeding hole and the fire and air hole and the like are basically solved.

Biomass combustion device for docking boilers, heat exchangers, and heating systems, including the burner body, the carbonization machine used to generate the fuel required for combustion of the burner body, and the steam generator. The steam output pipe of the steam generator is connected to the combustion The furnace of the machine body is connected. After the biomass raw material is initially cracked by the carbonization machine, tar is precipitated, and the resulting biomass fuel has a low tar content, which effectively avoids coking in the furnace during the combustion process. At the same time, the use of steam to support combustion can not only help to eliminate coking, but also improve the fire temperature of the combustion flame, the biomass fuel rate and the calorific value. The present invention organically combines the carbonization machine, the steam generator and the burner itself to improve Traditional biomass burners have problems such as low combustion rate, easy coking, low work efficiency and unstable operation. In addition to being used for docking boilers, heat exchangers, and heating systems, the present invention can also be applied to other equipment or systems that use open flame heating, such as large thermal motors.

The invention discloses a device and method for large-scale low-temperature pyrolysis of low-rank coal powder. A discharge opening of a vertical preheater is connected with a feed screw; the feed screw is connected with a pyrolysis kiln; a pyrolysis gas outlet of the pyrolysis kiln is connected with a settling connection box; the settling connection box is connected with a high-temperature filter device; a semicoke outlet of the pyrolysis kiln is connected with a semicoke cooling and waste heat recovering device; a steam outlet of the semicoke cooling and waste heat recovering device is connected with a steam pocket; an air outlet of a hot air heating furnace is connected with an air inlet of the pyrolysis kiln; and an exhaust outlet of the pyrolysis kiln is connected with an air inlet of the vertical preheater and an air inlet of the hot air heating furnace. The device is simple in system constitution, reasonable in technological structure, suitable for construction of a large-scale pyrolysis and deep processing production line and high in economic efficiency and environmental protection property.

A horizontal type circulating fluidized bed boiler with a horizontal cyclone separator comprises a main combustion chamber, a secondary combustion chamber (6), a burnout chamber (7) and a tail gas flue (11). A horizontal cyclone separator (25) is provided in the burnout chamber (7). An outer cylinder of the horizontal cyclone separator (25) is defined by a separator spacer (8), a burnout chamber rear water-cooled wall (23) and a burnout chamber side water-cooled wall (24). The separator spacer (8) is formed by a separator upper circular-arc section (81), a separator spacer lower vertical section (26) and a separator spacer inclined section (28). A middle cylinder (9) of the horizontal cyclone separator is inserted into the burnout chamber (7) from two sides or one side of the burnout chamber side water-cooled wall (24). The separator spacer lower vertical section (26), the burnout chamber rear water-cooled wall (23) and the burnout chamber side water-cooled wall (24) define a material returning channel (27). An aeration air nozzle (17) is provided at a lower part of the burnout chamber rear water-cooled wall (23). A V-shaped ash hopper wall (32), a material chute baffle plate (29), the separator spacer inclined section (28) and the burnout chamber side water-cooled wall (24) define a material chute (18). The aeration air nozzle (17) and the material chute (18) face each other in line arrangement. The horizontal type circulating fluidized bed boiler is particularly suitable for fluidized combustion of fuels like biomass with low ash content and coal gangue with high ash content.

An industrial production method for separating boron isotope products based on a methyl ether-boron trifluoride complex belongs to the technical field of isotope separation. It is mainly invented to solve the problems of serious vacuum belting in the chemical reaction exchange distillation method of methyl ether-boron trifluoride complex. Firstly, the methyl ether-boron trifluoride complex is stripped and dried, and the methyl ether-boron trifluoride complex from the stripping column is continuously added to the first exchange distillation column, and continuously extracted The liquid in the tank of the previous exchange distillation column is added to the top of the next column, and the steam at the top of the latter column continuously enters the tank of the previous column after being condensed; under reduced pressure heating and rectification, the boron trifluoride gas And the methyl ether gas enters the shell side of the condenser and the trap, the coolant goes through the tube side of the condenser and the trap, and the -60°C methyl ether solution is pumped to the sprayer, and the boron trifluoride gas Spraying is performed to convert boron trifluoride gas and methyl ether gas into methyl ether-boron trifluoride complex. The advantage is that it can solve the problem of vacuum belting.