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浅谈天然气脱硫设备的原理与技术特点

时间:2021-09-08
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一、天然气脱硫设备的工作原理:
1、 Working principle of natural gas desulfurization equipment:
原料天然气进入脱硫设备界区,先是经过一个原料气分离器,通过重力作用将原料气中携带的少量游离水清理掉,然后气体从脱硫塔顶部通过塔内脱硫剂床层,气体中的H2S被脱除。净化天然气从塔底出来,进入净化气过滤分离器,分离出气体中可能夹带的脱硫剂粉尘,出净化气过滤分离器的天然气直接汇入输气总管。至于再生操作,由于操作条件很难控制,且再利用成果不佳,故目前脱硫剂均一次性使用。
When the feed gas enters the battery limit of desulfurization equipment, it first passes through a feed gas separator to remove a small amount of free water carried in the feed gas by gravity, and then the gas passes through the desulfurizer bed in the tower from the top of the desulfurization tower, and the H2S in the gas is removed. The purified natural gas comes out from the tower bottom and enters the purified gas filter separator to separate the desulfurizer dust that may be entrained in the gas, and the natural gas from the purified gas filter separator directly flows into the gas transmission main pipe. As for the regeneration operation, since the operating conditions are difficult to control and the reuse results are poor, the desulfurizer is currently used once.
根据气质条件、处理量和场站规划建设方案等具体情况,可选择不同的干法脱硫工艺方案。当前方案有原料气分离器+双塔+净化气过滤分离器。除此外还有双塔+净化气过滤分离器、原料气分离器+四塔+净化气过滤分离器、四塔+净化气过滤分离器方案等等。
Different dry desulfurization process schemes can be selected according to the specific conditions such as gas quality conditions, treatment capacity and station planning and construction scheme. The current scheme includes feed gas separator + double tower + purified gas filter separator. In addition, there are schemes of double tower + purified gas filter separator, feed gas separator + four towers + purified gas filter separator, four towers + purified gas filter separator, etc.
二、天然气脱硫设备技术特点:
2、 Technical features of natural gas desulfurization equipment:
(1)脱硫剂,具有硫容高、强度大等优点,其实际硫容可达25%~30%(质量分数);
(1) Desulfurizer has the advantages of high sulfur capacity and high strength, and its actual sulfur capacity can reach 25% ~ 30% (mass fraction);
(2)脱硫剂可在0.1~8.0MPa压力范围内操作,且只脱除H,S不脱除CO2,净化气H,S含量可达一类天然气的要求;
(2) The desulfurizer can be operated within the pressure range of 0.1 ~ 8.0MPa, and only h and s are removed without CO2. The content of H and s in purified gas can meet the requirements of class I natural gas;
(3)设备的流程和设备都简单,操作方便,可实现无人值守;
(3) The process and equipment of the equipment are simple, easy to operate and unattended;
(4)设备投资和生产成本均较低,除装料时需少量耗能外,在运行条件下基本无能耗;
(4) The equipment investment and production cost are low. Except for a small amount of energy consumption during loading, there is basically no energy consumption under operating conditions;
(5)有废渣处理问题,但废渣对人、畜没损害,对环境不构成污染,对碱性土壤有一些改良作用;
(5) There is the problem of waste residue treatment, but the waste residue does not damage people and livestock, does not pollute the environment, and has some improvement effect on alkaline soil;
(6)使用固体脱硫剂的天然气脱硫设备,潜硫量越佳范围为H2S脱除量≤150kg/d,(按原料气含硫量不同),节约了操作成本。
(6) For the natural gas desulfurization equipment using solid desulfurizer, the better the sulfur potential is, the H2S removal amount is ≤ 150kg / D (according to the sulfur content of feed gas), which saves the operation cost.

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