44results about How to "Improve coal efficiency" patented technology

The invention discloses a double-flue direct burning type heating furnace, and belongs to heating furnaces. The double-flue direct burning type heating furnace structurally comprises a furnace body, a hearth and a feeding opening. A box is arranged on the outer side of the furnace body, and comprises an outer-layer box body, an inner-layer box body and an interlayer, and a smoke outlet and a hot water outlet pipe are arranged at the top of the box. An upper smoke outlet channel is arranged at the position, between an upper furnace ring and the hearth, of the furnace body, a lower smoke outlet channel is arranged between one side of the upper portion of the hearth and the furnace body, a plurality of vertical hot water circulating pipes are arranged in the lower smoke outlet channel, an upper separation plate and a lower separation plate are arranged on the upper portion and the lower portion of the lower smoke outlet channel respectively, a water inlet cavity of the furnace body is communicated with a water return pipe, a lower furnace ring hot water circulating channel is arranged in a lower furnace ring, an upper furnace ring hot water circulating channel is arranged in the upper furnace ring, a connecting pipe is arranged between the upper furnace ring and the lower furnace ring, and a plurality of horizontally-arranged horizontal hot water circulating pipes are arranged in the inner-layer box body. The double-flue direct burning type heating furnace has the advantages of being capable of improving coal-fired heating efficiency and saving fire coal, being compact and reasonable in structure and the like.

The invention provides a heavy medium continuous coal washing unit and a continuous raw coal crushing method. The heavy medium continuous coal washing unit comprises a cyclic coal crusher; a vibrating guiding device is disposed below the cyclic coal crusher; a belt conveyor is disposed between the vibrating guiding device and a raw material storage tank; the raw material storage tank is communicated with a raw coal entry of a tri-product heavy medium cyclone through a spiral conveyor; a suspension inlet of the tri-product heavy medium cyclone is communicated with a medium storage tank through a medium pump; a washed coal exit, a middling exit and a gangue exit of the tri-product heavy medium cyclone are respectively communicated with a medium removal device and a dewatering device; the medium removal device is communicated with the medium storage tank through a medium recovery pump. The heavy medium continuous coal washing unit and the continuous raw coal crushing method are available for continuous coal washing, labor cost and transport equipment cost for coal washing can be greatly reduced for enterprises, raw coal handling time is shortened, product structure optimization is facilitated for coal manufacturers, market competitiveness is improved, selling profit in products is increased, and washing rate of raw coal is increased for the whole coal industry.

The invention relates to a hot water sterilizing machine applied to agriculture by burning coal, belonging to the field of agriculture equipment. A furnace of the sterilizing machine of the invention is divided into a coal furnace and a fire furnace by a fire grate, the top of the coal furnace is connected with an air inlet pipe, a boiler barrel comprises water space in the lower part and negative pressure vacuum space in the upper part, the negative pressure vacuum space is internally provided with a recuperator tube connected with the outside, the water space is internally provided with heat pipe bundles to form a gas duct. The hot water sterilizing machine applied to agriculture by burning coal can combine a vacuum boiler, gasification wraparound burning and a membrane wall heat transmission structure and continuously provide hot water with the temperature of 90-95 DEG C, has high thermal utilization factor and generates little pollution to the environment, in addition, optimal combination is carried out on the structure of the invention, so that the sterilizing machine has small volume, high thermal efficiency and good mobility. With a membrane-beneath irrigation system adopted, the high temperature hot water obtained in the invention is irrigated in soil or ground substances to heat the soil or ground substances to 50-60 DEG C which lasts for 1-2 hours, thus killing a large amount of mixed fungus in the soil and restoring land capability of the soil.