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基于变压吸附制氮系统的BOG再冷凝工艺
BOG再冷凝工艺 变压吸附制氮
2018/12/25
为了解决LNG接收站在低输量工况下闪蒸气（Boil-Off Gas，以下简称BOG）回收不完全的问题，在不增加冷凝工艺复杂性的前提下，基于现有设备的实际工况及工艺流程，以热力学原理、静态仿真计算结果为依据，在传统的蓄冷式BOG冷凝方案的基础上，结合LNG冷能利用方式，提出了一种基于LNG接收站制氮系统的蓄冷回收BOG新工艺，并进行了BOG温度、冷凝器入口压力、LNG组分等参数的敏感性分析，明确了新...
BOG压缩机处理能力偏差分析与处理
LNG接收站 BOG压缩机 余隙阀 负荷
2016/12/27
某LNG接收站在生产运营期间，发现A、B2台BOG压缩机组在满负荷运转条件下处理能力有较大的差异，最大偏差为1.1t/h。为了解决该问题，从设备结构原理上进行了详细分析，推断可能是由压缩机余隙阀漏气引起。压缩机经解体检查，发现B压缩机一、二级气缸余隙阀漏气以及一级缸余隙阀执行机构压力销过长。经车削加工处理后，2台机组在入口温度为-127℃条件下满负荷运行时，处理能力分别为6.1、5.92t/h，基...
一般LNG接收站产生的BOG中含有大量的氮气，热值低，若直接压缩成CNG则严重影响汽车的动力性能；若利用再冷凝工艺采用低温BOG压缩机，因低温BOG压缩机太昂贵，对于小型LNG接收站来说不经济。为此提出一种常温压缩再冷凝的BOG回收工艺，即先将BOG加热到常温再增压，自身预冷回收冷量后再和增压后的过冷LNG混合液化，即可得到合格的LNG，其氮气、甲烷含量和热值均满足要求。通过HYSYS软件模拟，证...
Shoot organogenesis induction from genetically verified individuals of endangered bog pine (Pinus uncinata subsp. uliginosa)
DNA extraction in vitro regeneration leaves plastid DNA seedling shoot apices
2015/3/19
The objective of this work was to apply selected genetic markers to verify the genetic purity of bog pine (Pinus uncinata subsp. uliginosa) individuals from the Borkovicka blata population in order to...
由于LNG的低温特性，在其首次进入接收站工艺系统前，需要先对LNG卸料管线采用低温LNG蒸气（BOG）预冷至-120 ℃，然后再引入LNG将卸料管线冷却至-150 ℃。卸料管线预冷是确保LNG接收站顺利投产试运行的重点工作。为此，以浙江LNG接收站为例，采用自编程序建模，针对管径为1 000 mm长距离LNG卸料管线的BOG预冷过程，建立了一维流动传热模型，借助MATLAB工具模拟了BOG预冷LN...
Hydrochemical Peculiarities of Bog Ecosystems in the North-Siberian Lowland
Bogs Hydrochemical Characteristics Heavy Metals Pollution
2013/3/20
Surface waters of eutrophic bogs (fens) in the North-Siberian (Taimyr) lowland are characterized by hydrocarbonate, sulfate as well as hydro carbonate-sulfate calcium-magnesium composition. They relat...
Stable isotope fractionation during the methanogenic degradation of organic matter in the sediment of an acidic bog lake, Lake Grosse Fuchskuhle
Stable isotope fractionation during the methanogenic degradation of organic matter in the sediment an acidic bog lake Lake Grosse Fuchskuhle
2014/4/16
Lake Grosse Fuchskuhle is an acidic bog lake, which develops an anoxic hypolimnion during the summer season, so that sediment organic matter is degraded anaerobically to CH4and CO2. The d13 C values o...
Hydrology of a Patterned Bog-Fen Complex in Southeastern Labrador,Canada
Patterned Bog-Fen Complex Southeastern Labrador
2009/10/26
A 0.05 km2 patterned bog and a 0.29 km2 ribbed fen were compared to determine
the influence of their morphometry on runoff and evapotranspiration.
The bog hydrology was dominated by irregularly loca...
Energy and Water Balances of a Bog in Central Sweden
Energy and Water Balances Bog Central Sweden
2009/10/23
Fens and bogs represent a considerable part of the boreal forest area of Scandinavia,
but have not received much attention. To understand their role in the water
and energy balances an investigation...
Distribution of bog and heath in a Newfoundland blanket bog complex：topographic limits on the hydrological processes governing blanket bog development
derived from digital elevation models bog development multinomial logit
2009/5/26
This research quantified the role of topography and hydrological processes within and, hence, the development of, blanket bogs. Topographic characteristics were derived from digital elevation models (...
Increased aeolian activity during humidity shifts as recorded in a raised bog in south-west Sweden during the past 1700 years
Increased aeolian activity during humidity shifts as recorded in a raised bog in south-west Sweden during the past 1700 years
2008/11/5
Analyses of testate amoebae and aeolian sediment influx (ASI) were used to reconstruct effective humidity changes and aeolian activity in the coastal zone of south-west Sweden. Cores were taken from a...
Stable isotope studies of moss sulfur and sulfate from bog surface waters
sulfur stable isotope peat bog Sphagnum Polytrichum
2017/8/10
Two moss genera (Sphagnum and Polytrichum) were collected seasonally in two close (~0.45 km distance) but environmentally different locations, an Open bog and a Spruce forest at Hala Izerska (the Izer...
Small scale controls of greenhouse gas release under elevated N deposition rates in a restoring peat bog in NW Germany
Small scale controls greenhouse gas release N deposition rates
2010/1/15
In Central Europe, most bogs have a history of drainage and many of them are currently being restored. Success of restoration as well as greenhouse gas exchange of these bogs is influenced by environm...
Content of plant nutrients in vegetables depending on various lime materials used for neutralising bog peat
peat substrate limestone dolomite oil shale ash cement clinker dust tomato cucumber lettuce pepper mineral content in leaves nitrate carotene
2010/1/13
The trials were performed in the years 1998–2000 in Saku (59°18’N, 24º39’E) in greenhouse conditions. The aim was to establish how lime materials used for the neutralisation of bog peat acidity (...
Available plant nutrients in growth substrate depending on various lime materials used for neutralising bog peat
peat substrate limestone dolomite oil shale ash cement clinker dust content and ratios of available Ca, Mg, and K
2010/1/13
In 1998–2000, the effect of local Estonian lime materials (oil shale ash, cement clinker dust, limestone meal, dolomite meal and their mixtures) used for neutralising acid bog peat on the contents of ...