Gas production strategy of underground coal gasification based on multiple gas sources.

To lower stability requirement of gas production in UCG (underground coal gasification), create better space and opportunities of development for UCG, an emerging sunrise industry, in its initial stage, and reduce the emission of blast furnace gas, converter gas, and coke oven gas, this paper, for the first time, puts forward a new mode of utilization of multiple gas sources mainly including ground gasifier gas, UCG gas, blast furnace gas, converter gas, and coke oven gas and the new mode was demonstrated by field tests. According to the field tests, the existing power generation technology can fully adapt to situation of high hydrogen, low calorific value, and gas output fluctuation in the gas production in UCG in multiple-gas-sources power generation; there are large fluctuations and air can serve as a gasifying agent; the gas production of UCG in the mode of both power and methanol based on multiple gas sources has a strict requirement for stability. It was demonstrated by the field tests that the fluctuations in gas production in UCG can be well monitored through a quality control chart method.

Curative effect of transcatheter uterine artery embolization in the treatment of fibromyoma(a report of 21 cases) / 中华放射学杂志

Objective To evaluate the clinical effect of transcatheter ethanol embolization of bilateral uterine artery as a treatment for fibromyoma. Methods Twenty one women with uterine fibromyoma underwent femoral artery puncture and transcatheter uterine artery embolization. Free flow bilateral artery embolization with ethanol were performed on 16 cases, three women undergoing unilateral embolization, and gelatin sponge were used in 2 cases. Results All cases were observed with a follow up of 3 to 64 months (mean 25 months) after the treatment. Nineteen women infused with ethanol were reported noticeable symptomatic improvement, including fifteen women with complete resolution of symptoms. Two women embolized with sponge exhibited clinical response at 2 and 5 months after the procedure, respectively. The marked diminution of tumor size (40%-90%) was sonographically demonstrated. No severe complications were discovered in all 21 cases. Conclusion Uterine artery embolization represented a promising new method of treating fibroids. It had safe and good clinical results. Further investigation would be required to assess its long term effect.