CN109652119B - 污油/老化油处理设备 - Google Patents

污油/老化油处理设备 Download PDF

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CN109652119B
CN109652119B CN201910075633.1A CN201910075633A CN109652119B CN 109652119 B CN109652119 B CN 109652119B CN 201910075633 A CN201910075633 A CN 201910075633A CN 109652119 B CN109652119 B CN 109652119B
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李斐
王平
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Xinchang Technology Co ltd
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Abstract

本发明公开了一种污油/老化油处理设备,包括预处理器、固液分离器、破乳增核处理器、挤滤机、三相分离器、缓冲罐、送料泵、循环泵、输送泵、外输泵,预处理器将污油/老化油的预加热的温度设置为90‑92℃,输送到固液分离器中进行分离,一级分离后的固渣进入到挤滤机中进行固液挤压,挤滤机将挤压过的固渣外排,将挤压过的污水输送到破乳增核处理器中;一级分离后的油水进入到三相分离器中进行二级高速离心分离,三相分离器分离出来的油输送到缓冲罐中,并经过外输泵输送至回储罐,三相分离器分离出来的水输送到污水处理车间中进行处理,三相分离器分离出来的乳化物输送到破乳增核处理器中通过增核预处理,然后再返回到预处理器和固液分离器中。

Description

污油/老化油处理设备
技术领域
本发明涉及污油处理技术领域,尤其涉及一种污油/老化油处理设备。
背景技术
污油在石化行业也称之为老化油,就是一种稳定性非常高的油水乳化混合物。通常含水率(BS&W)在15%-80%。这种强乳化物对化学药剂不敏感,长期静置基本上也没有油水分离现象。
实验室研究表明,油水乳化,无论是油包水或水包油,都有一个称之为乳核的固体悬浮物存在,乳核直径分布在0.05μm-1200μm之间,比重为1.2-2.8g/cm3之间。固体悬浮物的直径、比重、油品的物理化学特性以及水的物理化学特性,对乳化物的稳定性之间的关系非常复杂。利用表面活性剂为基础的破乳剂对老化油的处理难度极高,而且针对性强、极不稳定。采用强酸、强碱预处理后,可以适当提高特定破乳剂的功效,但产生的二次污染以及废水的处理又会形成新的技术难题。
老化油的综合比重大于油小于水,在三相分离器中位于油水界面处,在油水分离过程中,如果总固体悬浮物的比例在一定范围以下(取决于油品),破乳剂才有功效。破乳剂破乳后,一般是乳核进入油相,粒径较大的有可能进入水相,但这就会影响水相含油率(OIW)。总之,只要能有效的去除乳化物中的作为乳核的固体悬浮物,油水乳化问题就会顺利解决,目前的处理设备及工艺有待进一步的完善。
发明内容
本发明的目的是为了克服现有技术的不足,提供了污油/老化油处理设备。
本发明是通过以下技术方案实现:
一种污油/老化油处理设备,包括预处理器、固液分离器、破乳增核处理器、挤滤机、三相分离器、缓冲罐、送料泵、循环泵、输送泵、外输泵,油罐中的污油/老化油通过所述送料泵输送到所述预处理器中进行预处理,所述预处理器将污油/老化油的预加热的温度设置为90-92℃,输送到固液分离器中进行分离,一级分离后的固渣进入到所述挤滤机中进行固液挤压,所述挤滤机将挤压过的固渣外排,将挤压过的污水输送到所述破乳增核处理器中,经过所述循环泵输送到预处理器中;一级分离后的油水进入到三相分离器中进行二级高速离心分离,三相分离器分离出来的油输送到所述缓冲罐中,并经过所述外输泵输送至回储罐,三相分离器分离出来的水输送到污水处理车间中进行处理,三相分离器分离出来的乳化物输送到破乳增核处理器中通过增核预处理,然后再返回到预处理器和固液分离器中。
进一步地,在污油/老化油输送管上安装有调节阀A,所述调节阀A用于调节通过送料泵的流量。
进一步地,在蒸汽输送管上安装有调节阀B,所述调节阀B用于调节输送到预处理器中蒸汽的流量。
进一步地,在所述预处理器与污油/老化油输送管之间并联安装有闸阀。
进一步地,经过所述挤滤机挤压后,外排固渣含水量小于65%,含油量小于2-3%。
进一步地,经过所述三相分离器分离后,油中含水BS&W为0.6-1.5%、水中含油OIW为55-150ppm。
经过固液分离器处理后,能够去除污油/老化油中96-99%以上的固体杂质,固渣进入到挤滤机中,挤滤机先是正压强压脱水,也称进浆脱水,即一定数量的滤板在强机械力的作用下被紧密排成一列,滤板面和滤板面之间形成滤室,过滤物料在强大的正压下被送入滤室,进入滤室的过滤物料其固体部分被过滤介质截留形成滤饼,液体部分透过过滤介质而排出滤室,从而达到固液分离的目的,随着正压压强的增大,固液分离则更彻底。
三相分离器属于二级分离,三相分离器分离为油水高速离心分离,二级分离有三个产品:油、水、乳化物。
经过一级处理后的污油,静置后也能实现初步油水分离,分离出的水中含油可以达到250PPM以下,油相含水在7%-15%之间。一级分离出的固体杂质的成份和污油的特性有关,游离状态的原油含量不超过1.2-2.5%(重量),含水:75-85%(重量比),固体中的有机物含量在25-35%之间。经过挤滤处理固渣含水率可以达到65%以下,和部分处理后的油混合可以进入焦化生产线作为原料,避免危废处理。二级处理后的油相出口含水率为0.6-1.5%随油品变化,油品无机固含量(不含焦粉)<0.8%,水相的含油率(OIW)80-500PPM也和油品有关系。
与现有的技术相比,本发明的有益效果是:本发明是结合生产现场现有工艺条件设计的,不同的油品和现场工艺条件的不同,要做相应的改变,运行参数也要在现场针对不同的油品做相应的调整。污油的预加热的最佳温度为90-92℃,油相、水相的接收端背压要小于0.2MPa(30PSI),污油进口压力为0.2-0.4MPa(30-60psi),单套设备的处理量可以达到8-12m3/h。
附图说明
图1为本发明的结构示意图。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白,以下结合附图及实施例,对本发明进行进一步详细说明。应当理解,此处所描述的具体实施例仅仅用以解释本发明,并不用于限定本发明。
在石油、石化行业出现的污油/老化油都有一个共同的特征:油水混合物中含有大量的污泥和固体杂质,这也从一个方面证实了实验室有关乳化机理的研究。污油中的污泥等固体杂质来源比较多,目前在国内石油石化行业污染源主要有:一是产油地层中的泥砂,这与地层特性和完井防砂的成败有直接关系;二是油田聚驱采油工艺,致使高分子聚合物残留进入生产液;三是油田的完井液、压井液,新开油井产出液等混入生产液。由于环保要求和监督水平的提高,油田的这些含油污泥水混入生产液,最终的处理压力转移到了炼油环节。前两个来源会在炼油工厂产生持续的污油/老化油,一般出现在污水处理车间的撇油工艺罐,或存储于原油储罐的底部。第三种原因的老化油/污油,在炼厂会产生不规律的电脱事故污油。
请参阅图1,图1为本发明的结构示意图。
所述的一种污油/老化油处理设备,包括预处理器1、固液分离器2、破乳增核处理器3、挤滤机4、三相分离器5、缓冲罐6、送料泵71、循环泵72、输送泵73、外输泵74,油罐中的污油/老化油通过所述送料泵71输送到所述预处理器1中进行预处理,所述预处理器1将污油/老化油的预加热的温度设置为90-92℃,输送到固液分离器2中进行分离,一级分离后的固渣进入到所述挤滤机4中进行固液挤压,所述挤滤机4将挤压过的固渣外排,将挤压过的污水输送到所述破乳增核处理器3中,经过所述循环泵72输送到预处理器1中;一级分离后的油水进入到三相分离器5中进行二级高速离心分离,三相分离器5分离出来的油输送到所述缓冲罐6中,并经过所述外输泵74输送至回储罐,三相分离器5分离出来的水输送到污水处理车间中进行处理,三相分离器5分离出来的乳化物输送到破乳增核处理器3中通过增核预处理,然后再返回到预处理器1和固液分离器2中。
在污油/老化油输送管101上安装有调节阀A102,所述调节阀A102用于调节通过送料泵71的流量,在蒸汽输送管103上安装有调节阀B104,所述调节阀B104用于调节输送到预处理器1中蒸汽的流量,在所述预处理器1与污油/老化油输送管101之间并联安装有闸阀105。
经过所述挤滤机4挤压后,外排固渣含水量小于65%,含油量小于2-3%,经过所述三相分离器5分离后,油中含水BS&W为0.6-1.5%、水中含油OIW为55-150ppm。
经过固液分离器2处理后,能够去除污油/老化油中96-99%以上的固体杂质,固渣进入到挤滤机4中,挤滤机4先是正压强压脱水,也称进浆脱水,即一定数量的滤板在强机械力的作用下被紧密排成一列,滤板面和滤板面之间形成滤室,过滤物料在强大的正压下被送入滤室,进入滤室的过滤物料其固体部分被过滤介质截留形成滤饼,液体部分透过过滤介质而排出滤室,从而达到固液分离的目的,随着正压压强的增大,固液分离则更彻底。
三相分离器5属于二级分离,三相分离器5分离为油水高速离心分离,二级分离有三个产品:油BS&W:0.6-1.5%、水OIW:55-150ppm、乳化物BS&W:5-12%,出现的量和油品有关。
经过一级处理后的污油,静置后也能实现初步油水分离,分离出的水中含油可以达到250PPM以下,油相含水在7%-15%之间。一级分离出的固体杂质的成份和污油的特性有关,游离状态的原油含量不超过1.2-2.5%(重量),含水:75-85%(重量比),固体中的有机物含量在25-35%之间。经过挤滤处理固渣含水率可以达到65%以下,和部分处理后的油混合可以进入焦化生产线作为原料,避免危废处理。二级处理后的油相出口含水率为0.6-1.5%随油品变化,油品无机固含量不含焦粉<0.8%,水相的含油率OIW80-500PPM也和油品有关系。
本发明是结合生产现场现有工艺条件设计的,不同的油品和现场工艺条件的不同,要做相应的改变,运行参数也要在现场针对不同的油品做相应的调整。污油的预加热的最佳温度为90-92℃,油相、水相的接收端背压要小于0.2MPa(30PSI),污油进口压力为0.2-0.4MPa(30-60psi)。单套设备的处理量可以达到8-12m3/h。
以上所述仅为本发明的较佳实施例而已,并不用以限制本发明,凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等,均应包含在本发明的保护范围之内。

Claims (1)

1.一种污油/老化油处理方法,其特征在于:包括预处理器(1)、固液分离器(2)、破乳增核处理器(3)、挤滤机(4)、三相分离器(5)、缓冲罐(6)、送料泵(71)、循环泵(72)、输送泵(73)、外输泵(74),油罐中的污油/老化油通过所述送料泵(71)输送到所述预处理器(1)中进行预处理,所述预处理器(1)将污油/老化油的预加热的温度设置为90-92℃,输送到固液分离器(2)中进行分离,一级分离后的固渣进入到所述挤滤机(4)中进行固液挤压,所述挤滤机(4)将挤压过的固渣外排,将挤压过的污水输送到所述破乳增核处理器(3)中,经过所述循环泵(72)输送到预处理器(1)中;一级分离后的油水进入到三相分离器(5)中进行二级高速离心分离,三相分离器(5)分离出来的油输送到所述缓冲罐(6)中,并经过所述外输泵(74)输送至回储罐,三相分离器(5)分离出来的水输送到污水处理车间中进行处理,三相分离器(5)分离出来的乳化物输送到破乳增核处理器(3)中通过增核预处理,然后再返回到预处理器(1)和固液分离器(2)中,在污油/老化油输送管(101)上安装有调节阀A(102),所述调节阀A(102)用于调节通过送料泵(71)的流量,在蒸汽输送管(103)上安装有调节阀B(104),所述调节阀B(104)用于调节输送到预处理器(1)中蒸汽的流量,在所述预处理器(1)与污油/老化油输送管(101)之间并联安装有闸阀(105),经过所述挤滤机(4)挤压后,外排固渣含水量小于65%,含油量小于2-3%,经过所述三相分离器(5)分离后,油中含水率为0.6-1.5%、水中含油率为55-150ppm,污油的预加热的温度为90-92℃,油相、水相的接收端背压要小于0.2MPa,污油进口压力为0.2-0.4MPa,单套设备的处理量可达到8-12m3/h。
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