共查询到15条相似文献,搜索用时 106 毫秒
1.
2.
3.
4.
5.
6.
7.
8.
本主要介绍了小孔喷注消声器在余热发电热发电蒸汽放空过程中的应用,降噪效果显,收到了良好的环境效益和社会效益。 相似文献
9.
10.
通过在炼油厂放空系统上加装三组调节阀,将加热炉燃油喷嘴改为燃气喷嘴,使以前废弃烧掉的火炬气克分回收利用,即保护了环境,节约了能源,又提高了经济效益。 相似文献
11.
12.
13.
14.
Fugitive methane emissions account for about 50% of the greenhouse gas (GHG) emissions from the Canadian conventional oil and gas sector. Sources include leaks in natural gas transmission facilities such as pipelines and compressor stations. There are three sources of methane emissions in a compressor station. The first is emissions resulting from incomplete combustion in the engine; the second is leaks in valves, flanges and other equipment in the building; and the third results from instrument venting. Fugitive methane emissions may be in low concentration relative to air, and thus cannot be destroyed by conventional combustion (below flammability limits of about 5-16%). The present study investigates the feasibility of capturing methane emissions from a compressor station. Computer modelling of the flow patterns of lean methane emissions inside the building is used to show the influence of doors, vents and leak location. Simulations show that for a typical building most fugitive methane exits through the ridge vent provided that the main doors remain closed. When the extraction rate through the ridge vent is controlled, the methane concentration is at acceptable levels for destruction in a catalytic flow reverse reactor, that is, in the range of 0.1-1% by volume. 相似文献
15.
《International Journal of Greenhouse Gas Control》2008,2(1):95-104
The behavior of natural carbon dioxide (CO2) droplets (8–10 mm in diameter) were observed in a seafloor hydrothermal system at the Okinawa Trough. The natural CO2 droplet contain 95–98% of CO2, 2–3% of H2S, and other gas species. The ascending CO2 droplets were tracked by a remotely operated vehicle (ROV), and depth, temperature, salinity, pH and partial pressure of CO2 (pCO2) in seawater near the CO2 droplets were measured during droplet ascent by a conductivity-temperature-depth sensor (CTD) and in situ pH/pCO2 sensor. The visual images of the rising CO2 droplets were recorded with a high definition television camera on the ROV. A mapping survey (400 m × 400 m; 4 horizontal layers) revealed a dominant distribution of low pH area over the natural CO2 venting site. The size and rise rate of CO2 droplets decreased during their ascent in the water column from depths of 1424 to 679 m (a tracking interval of 745 m). The CO2 droplets dissolved gradually to become small flakes of CO2 hydrate while rising, and these ascending flakes were found to disappear at 679 m depth. Although a pH as low as 5 was detected just above the liquid CO2 venting site on the seafloor, no detectable pH depression in the water column ambient to the rising CO2 droplets was observed. The results of the pH mapping survey showed only localized pH depression over the CO2 venting site. 相似文献