摘要
脱硫塔拦液问题是造成天然气净化厂产品气不合格的原因之一,也是长期困扰天然气净化装置平稳运行的生产难题。中国石油长庆油田公司第二净化厂引进天津创举科技有限公司生产的CJST塔盘,对1号净化装置脱硫塔进行了技术改造,有效解决了脱硫塔拦液问题。为此,结合脱硫塔改造后CJST塔盘的运行状况,分析评价了CJST塔盘对脱硫塔稳定性、产品气气质和酸气量的影响,并根据进厂原料气组分特点和CJST塔盘的不足之处,提出了3点改进建议:①在1号脱硫塔安装数层浮阀塔盘,增强溶液对CO2的吸收,减少湿净化气分离器携液量;②利用CO2与胺液反应慢的特点,将固定溢流堰改为可调堰,并适当提高溢流堰高度,增加胺溶液在塔盘上的停留时间;③对CJST塔盘布局、结构重新调整,使CJST塔盘在装置高负荷、原料气高CO2的工况下,CO2脱除率稳定在49%～52%,确保产品气全部达标。CJST塔盘投运后,1号净化装置生产蒸汽消耗较以前明显减少,有效降低了天然气处理成本,节能降耗效果明显。
The puking condition of the desulfurizing tower is one of the reasons leading to the unqualified gas produced from a gas purification plant, and is also one of the problems confronting the steady operation of the plant for a long time. The No. 2 Gas Purification Plant of PetroChina Changqing Gas Field bought the CJST tray made by the Tianjin Chuangju Scientific & Technological Co., Ltd., then made technical innovation on the No. 1 desulfurizing tower, thus to successfully solve the puking condition there. In view of this, an in-depth analysis and assessment, in combination with the smooth working status of the CJST tray after technical innovation, were made of the influence of the CJST tray on the stability operation of the desulfurizing tower, the quality of gas product, and the volume of acid gas. Then, according to the characteristic of the feed gas composition and the disadvantages of the CJST tray, three proposals for technical innovation have been adopted as follows: a. Several layers of float valve trays were added to increase the adsorption of CO2 of the solution and reduce the liquid carrying capacity of the wet gas separator. b. In light of the low reaction of CO2 mixed with the amine solution, the fixed overflow weir could be altered to the adjustable one, the height of which could be raised, thus to propone the contact time of the amine solution on the tray. c. The layout and structure of the CJST was readjusted to meet the high requirement of different working status, thus even under the condition of a high load and high-CO2 feed gas, the CO2 removal rate was always kept at 49 - 52% and the gas product is all up to the standard. Since the CJST was put into operation after some innovation, the energy consumption of producing the steam in the No. 1 desulfurizing tower has been significantly reduced and thus, the cost of natural gas treatment has been effectively cut down, so this proves that the reformed CJST tray helps achieve obviously good results in energy saving and consumption reducing.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2010年第3期106-110,共5页
Natural Gas Industry
关键词
长庆气田
天然气
净化
H2S
CO2
拦液
CJST塔盘
节能降耗
Changqing gas field, natural gas, purification, H2S, CO2, puking condition, CJST tray, float valve tower
