CN103253839B - 石油开采污泥回注无害化处理方法 - Google Patents
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Abstract
一种石油开采污泥回注无害化处理方法,涉及石油开采污泥无害化处理技术领域,通过由若干台并联的液压注入泵组成的泵站,将石油开采产生的污泥送至油田的废弃层中。本发明方法采用冲程长、冲次低、压力高的液压注入泵,将污泥注入油田废弃层,不但解决了油田开采污泥的处理难题,同时将污泥打回地下,从而将污泥中石油资源回收利用,提高了油田的石油采收率,将石油开采污泥变废为宝。
Description
技术领域
本发明涉及石油开采污泥无害化处理技术领域,具体涉及一种石油开采污泥回注无害化处理方法。
背景技术
油田开采的石油经油水分离,会产生大量的污泥,石油开采污泥成分极其复杂,主要由乳化油、水、固体悬浮物等混合组成,其成分与地质条件、生产技术、污水处理工艺、污水水质、加药种类、排污方式以及管理操作水平有关,石油开采污泥的比阻比一般污泥大40倍,其可压缩性系数大20倍,属难过滤性污泥,又由于其颗粒细小,呈絮凝体状,含水量高,体积庞大,因此不易实现油-水-泥的三相分离。石油开采污泥直接外排会占用大量土地,其含有的有毒物质会污染水、土壤和空气,污染生态环境;若将开采污泥直接在污水处理系统循环时,会造成污水处理系统的运行条件恶化,对生产造成不可预计的损失。因此,无论是从环境保护、维护正常生产还是从回收能源的角度出发,都必须对石油开采污泥进行无害化、资源化处理。
目前大多通过两种方式对石油开采污泥进行无害化处理,一是在开采污泥中加入一定组分的固化剂,使其发生一些稳定的、不可逆的物理化学反应,固化其中的部分水分和有毒物质,并使其有一定强度,以便堆放、储存和后续处理;二是采用焚烧技术处理开采污泥。但是固化处理后的污泥堆放占用了大面积土地,造成了资金的浪费,且加入有机固化剂可能带来二次污染;而焚烧方法成本和操作费用较高,污泥中的大量石油资源被浪费,焚烧产生的热量不能充分利用,且焚烧产生的SO2、CO及粉尘会对空气造成严重污染。
发明内容
本发明的目的是提供一种石油开采污泥回注无害化处理方法,以解决现有技术存在的处理成本高、对环境不利以及浪费石油开采污泥中的石油资源的问题。
本发明的目的是通过以下技术方案实现的:
一种石油开采污泥回注无害化处理方法,通过由若干台并联的液压注入泵组成的泵站,将石油开采产生的污泥送至油田的废弃层中,具体处理步骤如下:
(1)对石油开采污泥进行取样,分析污泥成分和粒度,确定污泥的适合回注的地层深度;
(2)根据污泥成分分析结果,按照一定比例添加悬浮剂或固化剂;
(3)根据污泥粒度分析结果,确定污泥回注地层深度,通过并联的液压注入泵将污泥送至油田的废弃层中。
上述悬浮剂的添加量为石油开采污泥质量的0.05%~0.2%。
上述固化剂的添加量为石油开采污泥质量的0.1%~0.25%。
上述液压注入泵中部设置双作用式液压缸,液压缸两端各有一个污泥缸,液压缸内设置液压活塞杆,液压活塞杆两端各安装一个活塞,两个污泥缸外侧各安装一个阀箱,每个阀箱内有两个阀,上端为排液阀,下端为进液阀。
本发明方法的有益效果是:
本发明方法根据石油开采污泥产于底层,与有层具有良好配伍性的原理,采用冲程长、冲次低、压力高的液压注入泵,将污泥打回油田废弃层,不但解决了油田开采污泥的处理难题,同时将污泥打回地下,从而将污泥中石油资源回收利用,提高油田的石油开采率,将石油开采污泥变废为宝。
附图说明:
下面结合附图和实施例对发明方法进一步说明。
图1是本发明方法的工作原理示意图;
图2是本发明采用的液压注入泵的结构示意图。
图中1阀箱、2排液阀、3进液阀、4污泥缸、5活塞、6出浆管线、7液压缸、8液压活塞杆、9进浆管线。
具体实施方式:
如图1和图2所示,一种石油开采污泥回注无害化处理方法,开采污泥为胜利油田开采的原油,经油水分离后,产生的油田开采污泥,经取样分析,污泥成分为泥质约为35%,原油约为29%,水约为35%,泥质成分主要为粗-细粉砂岩,其中粒径小于30微米的占83%,经脱油、脱水后过标准筛,75%以上可通过200目筛,100%可通过100目筛;向开采污泥中加入石油开采污泥质量0.1%的悬浮剂,向开采污泥中加入石油开采污泥质量0.14%的固化剂;通过由并联的液压注入泵组成的泵站将石油开采污泥送至油田的废弃层,液压注入泵采用35KW电动机,斜轴恒功率变量柱塞泵,定量泵或手调变量或恒功率自动变量方式。
本发明方法可及时的将石油开采产生的含油污泥送回油田内部,既解决了油田开采污泥的处理难题,又将油田开采污泥变废为宝。
本发明方法所用液压注入泵中部设置双作用式液压缸7,液压缸7两端各有一个污泥缸4,液压缸内设置液压活塞杆8,液压活塞杆8两端各安装一个活塞5,两个污泥缸4外侧各安装一个阀箱1,每个阀箱1内有两个阀,上端为排液阀2,下端为进液阀3。
工作时,当液压活塞杆8从左侧移动向右侧时,左侧阀箱1进液阀3打开,排液阀2关闭,左侧污泥缸4通过进浆管线9吸入污泥;右侧阀箱1内进液阀3关闭,排液阀2打开,右侧污泥缸4通过出浆管线6排出污泥,当液压活塞杆8从右侧移动向左侧时,右侧阀箱1进液阀3打开,排液阀2关闭,右侧污泥缸4通过进浆管线9吸入污泥;左侧阀箱1内进液阀3关闭,排液阀2打开,左侧污泥缸4通过出浆管线6排出污泥。液压活塞杆如此往复运动实现了石油开采污泥回注入废弃层。
Claims (4)
1.一种石油开采污泥回注无害化处理方法,其特征是通过由若干台并联的液压注入泵组成的泵站,将石油开采产生的污泥注入油田的废弃层中,具体处理步骤如下:
(1)对石油开采污泥进行取样,分析污泥成分和粒度,确定污泥的适合回注的地层深度;
(2)根据污泥成分分析结果,按照一定比例添加悬浮剂或固化剂;
(3)根据污泥粒度分析结果,确定污泥回注地层深度,通过泵站将污泥送至油田的废弃层中。
2.根据权利要求1所述的石油开采污泥回注无害化处理方法,其特征是悬浮剂的添加量为石油开采污泥质量的0.05%~0.2%。
3.根据权利要求1所述的石油开采污泥回注无害化处理方法,其特征是固化剂的添加量为石油开采污泥质量的0.1%~0.25%。
4.根据权利要求1所述的石油开采污泥回注无害化处理方法,其特征是液压注入泵中部设置双作用式液压缸,液压缸两端各有一个污泥缸,液压活塞杆在液压缸内,两端各安装一个污泥活塞,两个污泥缸外侧各安装一个阀箱,每个阀箱内有两个阀,上端为出液阀,下端为进液阀。
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