51results about How to "Less radiant heat" patented technology

The invention provides a desert control method. The desert control method comprises the following steps of: after flattening a sand land in a desert area to be treated, taking earthworks with the height of less than or equal to 3m and forming a square-structure basin; constructing windproof dams around the square-structure basin; paving anti-curing layers on the surfaces of the windproof dams and the square-structure basin, wherein the anti-curing layer comprises an ash-mixed sand layer, a first modified soil layer, a paper material layer and a second modified soil layer; and after paving, spraying nutritive water on the anti-curing layers, wherein the ash-mixed sand layer comprises the following components in parts by weight: 1-12 parts of plant ash and 100 parts of aeolian sandy soil; the first modified soil layer and the second modified soil layer and the second modified soil layer comprise the following components in parts by weight: 2-8 parts of cement, 100 parts of aeolian sandy soil and 3.1-13.2 parts of plant ash; and planting green plants on the anti-curing layers sprayed with the nutritive water. The desert control method provided by the invention is simple in process and good in practicability, can realize large-scale engineered and mechanized construction and is wide in application range.

The invention relates to a space division precooling system which comprises an air cooling tower and a water cooling tower; an air inlet pipe is connected to the lower part of the air cooling tower; the top of the air cooling tower is provided with an air outlet; and at least a part of tower section of the air cooling tower is arranged in a tower cavity of the water cooling tower. For the space division precooling system provided by the invention, the air cooling tower and the water cooling tower are combined into one, and one tower body can satisfy respective functions of the air cooling tower and the water cooling tower, so that the occupying area of the space division precooling system is obviously reduced, and the system building cost is reduced. As the water cooling tower encloses theouter part of the air cooling tower to exert the cooling effect to the whole body of the air cooling tower, the cooling efficiency and effect of the air cooling tower can be improved, and the cost ofarranging a heat insulation material at the outer part of the whole tower of the air cooling tower can be reduced; and radiation heats produced by illuminating two tower bodies with the sun are reduced in high-temperature summer, and the cooling efficiency of the precooling system is improved.

The invention relates to a high-power silicon nitride ceramic heating sheet and a fabrication method for a hard inner part and flexible outer part thereof. The fabrication method comprises the following steps of 1, granulating an insulation ceramic material; 2, fabricating cylindrical particles into insulation ceramic blanks, and drying the insulation ceramic blanks; 3, performing drying, granulation, formation, tabletting, degumming, sintering and cutting to the required heating ceramic sheet and a welding ceramic sheet; and 4, integratedly laminating the two insulation ceramic blanks which are formed already, the heating ceramic sheet and the welding ceramic sheet for hardening, degumming, sintering and cutting to a required shape. The fabrication method has the advantages that 1, rapid heating and accurate temperature control can be achieved; 2, the heating ceramic is very uniform in heat generation, and the thermal loss is very low; 3, the heating ceramic, the insulation ceramic and the welding ceramic are integratedly sintered, and no interface and good quality are achieved; and 4, the welding area is large, and the welding outgoing line is very firm.

The invention belongs to an energy-saving device and an energy-saving method for a polycrystalline silicon reduction furnace with a polycrystalline silicon insert heat insulation layer. A distance between a heat insulation layer consisting of stainless steel tubes and polycrystalline silicon inserts and an inner wall of a furnace body is 25 to 250mm; the heat insulation layer is connected with the inner wall of the furnace body, and the furnace body is fixed on a base through a flange; a base plate air inlet is formed in the base, hydrogen or hydrogen silicon tetrachloride gas enters an annular air inlet tube through the base plate air inlet, a square opening is formed in the annular air inlet tube, and the hydrogen or hydrogen silicon tetrachloride gas enters a gap between the furnace body and the heat insulation layer through the annular air inlet tube, and is filled in the gap; by adopting the heat insulation layer consisting of a stainless steel tube cylindrical frame and the polycrystalline silicon inserts, radiant heat-transfer loss of silicon rods in the furnace to a wall surface of the furnace body is reduced, and high-purity polycrystalline silicon products are deposited on the polycrystalline silicon inserts on the heat insulation layer; the polycrystalline silicon inserts on the heat insulation layer are not polluted by metals in the process of growing the polycrystalline silicon by employing a frame cooling system; and due to the adoption of a wall surface protection system, a mirror surface on the inner wall of the furnace body is not polluted.