46results about How to "No spontaneous combustion" patented technology

The invention provides a step-by-step quality-improving processing technique for low-level coal. The processing technique includes the following steps: (1) the step of drying: raw coal particles are fed into a drying reactor to carry out anoxic hot gas drying under normal pressure, and moisture in the raw coal particles is physically removed; (2) the step of low-temperature dry distillation (thermal decomposition): the dry coal particles which are processed by the step (1) are fed into the dry distillation (thermal decomposition) reactor, anoxic gas is filled under normal pressure to carry out heating and dry distilling, and volatile matters in raw coal overflow in gaseous state through chemical changing. The invention further provides a step-by-step quality-improving processing system for the low-level coal, which comprises the drying reactor and the dry distillation reactor. The dry distillation reactor is arranged at the lower part of the drying reactor. By adopting the step-by-step processing method of drying and low-temperature dry distilling, the invention overcomes the singleness of the domestic quality-improving technology for the low-level coal in the treatment of coal varieties, thereby realizing the diversity of the quality-improving coal varieties.

The invention relates to a coal gangue hill control technology, in particular to a heap storage method for preventing spontaneous combustion of a coal gangue hill, thereby solving the problems that the existing heap storage way is easy to cause the spontaneous combustion of the free surface and the edge of a hill body, and once one place occurs the spontaneous combustion, a plurality of places are burnt. The heap storage method comprises the steps of carrying out transverse layered soil coverage grinding treatment in each layer of the coal gangue hill body; setting a soil isolation chamber atthe free place of a slope at the middle and lower part of the coal gangue hill body and the plane place of a top layer along the longitudinal direction; and adopting three layers of soil coverage layers of a grinding loess layer, a loosening loess layer and a fine particle gangue layer at the outmost layer of the coal gangue hill body. The heap storage method can not only effectively prevent the spontaneous combustion of coal gangue, but also prevent water and soil loss caused by rainwater brushing and dust flying with wind and provide a beneficial growth environment for plants; furthermore, the heap storage method adopts the transverse layered soil coverage grinding treatment way and sets the soil isolation chamber at the free place of the slope at the middle and lower part of the hill body and the plane place at the top, thereby being capable of controlling the spontaneous combustion of the coal gangue caused by manual disturbance or other factors in the local region and not causingthe impacts on the whole hill body.

The invention provides a high-temperature-resistant solid propellant for a deep oil-gas well. The solid propellant is prepared from the following raw materials in percentage by weight: 55.00-73.00% of potassium perchlorate, 10.00-43.37% of high-temperature-resistant epoxy resin, 0-11.40% of bisphenol A epoxy resin, 0-12.77% of epoxy-resin reactive diluent, 0.03% of defoamer and 0.98-1.60% of 2-ethyl-4-methylimidazole, wherein the sum of the weight percent of the raw materials is 100%; and the raw materials of the propellant are subjected to premixing and remixing and are finally poured into a mold for molding so as to prepare a finished product. The solid propellant has excellent hydrolysis resistance; when the solid propellant is soaked in clean water and 3.5% brine for 24-48 hours, the loss of weight is lower than 3%, and the volume change is lower than 2%; and the temperature resistance is better, the temperature resisting level reaches 180 DEG C in 48 hours, and the spontaneous combustion does not occur, thus the solid propellant can be used in high-temperature watery environment.

The invention provides a high-temperature-resistant propellant for an oil / gas deep well. The high-temperature-resistant propellant is prepared from the following raw materials by weight percent: 30 to 58 percent of potassium perchlorate, 2 to 30 percent of 1,1'-dihydroxyl-5,5'-bistetrazole dihydroxylamine salt, 10 to 20.90 percent of high-temperature-resistant epoxy resin, 0 to 16.58 percent of bisphenol A epoxy resin, 4.75 to 13.03 percent of epoxy resin active diluting agent, 0.5 percent of accelerant boron trifluoride-amine complex, 0.03 percent of a defoaming agent, 6.57 to 8.14 percent of diaminodiphenyl sulfone, and the sum of the weight percentage of the raw materials is 100 percent. The raw materials of the propellant are mixed after being pre-mixed, and then the mixed materials are formed by virtue of a mold to produce a finished product. After the solid propellant is immersed in clean water and 3.5% saline water for 24 to 48 hours, the weight loss of the solid propellant is less than 3 percent, and the volume variation is less than 2 percent; the temperature-resistant grade can reach 200 DEG C for 48 hours, the spontaneous combustion of the propellant can be avoided, and the high-temperature-resistant propellant can be used in a high-temperature watery environment.

The invention discloses a heat-resistant solid propellant for an oil-gas deep well. The heat-resistant solid propellant is prepared from the following components in percentage by weight: 45%-65% of potassium perchlorate, 0-10% of N-guanylurea dinitramide, 5.59%-26.79% of heat-resistant epoxy resin, 1.77%-10.38% of bisphenol A epoxy resin, 6.04%-13.7% of an epoxy resin reactive diluent, 0.5% of an accelerant, 0.03% of an antifoaming agent and 4.80%-9.87% of diamino diphenyl sulfone, wherein the sum of the raw materials in percentage by weight is 100%. The raw materials for the propellant are premixed, then are mixed, and finally are cast into a mold tobe molded, so as to prepare the finished product. The heat-resistant solid propellant is excellent in hydrolysis resistance. The heat-resistant solid propellant is soaked in clean water and 3.5% saline water for 24-48 hours; the weight loss is smaller than 3%; the volume change is smaller than 2%; the heat resistance is relatively good; the heat-resistant level reaches the condition that the solid propellant does not spontaneously combust or explode when being at 200 DEG C for 48 hours; and the heat-resistant solid propellant can be used in a high-temperature washy environment.