CN108332509A - 一种开车时节省氮气用量的HyCO冷箱系统 - Google Patents

一种开车时节省氮气用量的HyCO冷箱系统 Download PDF

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CN108332509A
CN108332509A CN201810241236.2A CN201810241236A CN108332509A CN 108332509 A CN108332509 A CN 108332509A CN 201810241236 A CN201810241236 A CN 201810241236A CN 108332509 A CN108332509 A CN 108332509A
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pipeline
nitrogen
newly
high pressure
pressure
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徐晶
吉荣
李现民
钟华
庒浩杰
陆连根
张国英
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Shanghai Hualin Industrial Gas Co Ltd
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Shanghai Hualin Industrial Gas Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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Abstract

本发明涉及一种开车时节省氮气用量的HyCO冷箱系统，本发明在原有低压CO管线与粗H2管线之间设有新增低压氮气开工管线，在原有高压CO管线与H2产品管线上设有新增高压氮气开工管线，高压CO管线与低低压CO管线之间连接有膨胀机，高压CO管线与膨胀机之间还引出第三条管线，该第三条管线连接至H2气提塔。HyCO冷箱开车的时候建立起氮气的循环，减少氮气的放空，从而减少了氮气进口补给量。与现有技术相比，本发明的系统与方法降低了开车时候的氮气的消耗，减少了开车的成本。

Description

一种开车时节省氮气用量的HyCO冷箱系统
技术领域
本发明涉及HyCO冷箱装置，尤其是涉及一种开车时节省氮气用量的HyCO冷箱系统。
背景技术
目前大多数冷箱开车都是气体经过压缩机加压以后经过膨胀机节流产生冷量对冷箱进行逐步预冷的。空气分离的冷箱开车主要是通过空气进入压缩机加压以后经过膨胀机节流产生冷量，因为空气分离工艺的原料为空气，而产品为氮气、氧气、氩气为主。
HyCO装置主要是将原料(54％左右的CO、45％左右的H2以及微量的N2、CH4、H2O、CO2)逐步分离的过程，提纯以后最终产品为H2和CO，目前HyCO冷箱开车主要是根据汤－焦效应由于氮气经过冷箱控制阀时膨胀，系统内温度开始下降。调节相关控制阀来分配冷箱中冷量，使冷箱内的所有线路和换热器均衡的冷却。显然如果用空气开车会导致冷箱内部氧气和氩气超标，会损坏HyCO冷箱设备。所以HyCO开车只能使用氮气来开车，氮气经过冷箱进行换热以后放空，从而纯氮气开车对HyCO的开车成本有很大影响。尽量减少开车氮气的使用量就成为必须要克服的问题。
发明内容
本发明的目的就是为了克服上述现有技术存在的缺陷而提供一种开车时节省氮气用量的HyCO冷箱系统。
本发明的目的可以通过以下技术方案来实现：
一种开车时节省氮气用量的HyCO冷箱系统，包括：通过管路顺序相连的气液分离罐、H2气提塔、N2/CO分离塔、CO/CH4分离塔，所述气液分离罐入口连接合成气原料管线，所述气液分离罐还通过粗H2管线连接变压吸附塔，所述变压吸附塔连接H2产品管线，所述N2/CO分离塔还与N2/CO再沸器连接，所述CO/CH4分离塔还与CO/CH4再沸器连接，所述CO/CH4分离塔外接低压CO管线，CO压缩机设置有串联的三个，所述低压CO管线连接至第二个CO压缩机，第二个CO压缩机引出CO产品管线，第三个CO压缩机连接高压CO管线，高压CO管线引出两条管线，第一条管线穿过CO/CH4再沸器后进入CO/CH4分离塔，第二条管线经过N2/CO再沸器后与低低压CO管线接通，所述低低压CO管线进入第一个CO压缩机，所述第一个CO压缩机前还连接开车用N2管线，
所述低压CO管线与粗H2管线之间设有新增低压氮气开工管线，所述高压CO管线与H2产品管线上设有新增高压氮气开工管线，所述高压CO管线与低低压CO管线之间连接有膨胀机，所述高压CO管线与膨胀机之间还引出第三条管线，该第三条管线连接至H2气提塔。
所述低低压CO管线先后穿过2#板翅换热器与1#板翅换热器换热。
所述合成气原料管线先后穿过1#板翅换热器与2#板翅换热器换热。
所述高压CO管线穿过1#板翅换热器换热。
在新增低压氮气开工管线上设有新增1号调节阀。
所述新增高压氮气开工管线上设有新增2号调节阀。
一种进行HyCO冷箱开车时节省氮气用量的方法，在所述高压CO管线与H2产品管线上设有新增高压氮气开工管线，所述新增高压氮气开工管线上设有新增2号调节阀与两个截止阀，在所述低压CO管线与粗H2管线之间设有新增低压氮气开工管线，在新增低压氮气开工管线上设有新增1号调节阀与两个截止阀，HyCO冷箱开车的时候建立起氮气的循环，减少氮气的放空，从而减少了氮气进口补给量，具体方法为：
1、CO压缩机正产运行以后，第一个CO压缩机前开车用N2管线上氮气调节阀开度增加，氮气补入量为1000Nm3/h，第三个CO压缩机出口压力达到10.9barg以后，将膨胀机启动；
2、膨胀机启动以后，渐渐打开1号调节阀与2号调节阀；
3、1号调节阀与2号调节阀开至55％以后，第一个CO压缩机前开车用N2管线上氮气调节阀开度减小至2％，氮气补入量下降至200Nm3/h。
与现有技术相比，本发明具有以下优点：
(1)本发明的系统与方法降低了开车时候的氮气的消耗。
(2)本发明的系统与方法减少了开车的成本。
附图说明
图1为实施例1中开车时节省氮气用量的HyCO冷箱系统结构示意图。
图中标号：1为开车用N2管线，2为CO压缩机，3为新增1号调节阀，4为新增低压氮气开工管线，5为新增2号调节阀，6为新增高压氮气开工管线，7为1#板翅换热器，8为膨胀机，9为2#板翅换热器，10为高压CO管线，11为低低压CO管线，12为低压CO管线，13为粗H2管线，14为H2产品管线，15为变压吸附塔，16为合成气原料管线，17为气液分离罐，18为CO/CH4再沸器，19为N2/CO再沸器，20为N2/CO分离塔，21为CO/CH4分离塔，22为H2气提塔，23为CO产品管线。
具体实施方式
下面结合附图和具体实施例对本发明进行详细说明。
实施例
参考图1，一种开车时节省氮气用量的HyCO冷箱系统，包括：通过管路顺序相连的气液分离罐17、H2气提塔22、N2/CO分离塔20、CO/CH4分离塔21，气液分离罐17入口连接合成气原料管线16，气液分离罐17还通过粗H2管线13连接变压吸附塔15，变压吸附塔15连接H2产品管线14，N2/CO分离塔20还与N2/CO再沸器19连接，CO/CH4分离塔21还与CO/CH4再沸器18连接，CO/CH4分离塔21外接低压CO管线12，CO压缩机2设置有串联的三个，低压CO管线12连接至第二个CO压缩机2，第二个CO压缩机2引出CO产品管线23，第三个CO压缩机2连接高压CO管线10，高压CO管线10引出两条管线，第一条管线穿过CO/CH4再沸器18后进入CO/CH4分离塔21，第二条管线经过N2/CO再沸器19后与低低压CO管线11接通，低低压CO管线11进入第一个CO压缩机2，第一个CO压缩机2前还连接开车用N2管线1，低压CO管线12与粗H2管线13之间设有新增低压氮气开工管线4，高压CO管线10与H2产品管线14上设有新增高压氮气开工管线6，高压CO管线10与低低压CO管线11之间连接有膨胀机8，高压CO管线10与膨胀机8之间还引出第三条管线，该第三条管线连接至H2气提塔22。
低低压CO管线11先后穿过2#板翅换热器9与1#板翅换热器7换热。合成气原料管线16先后穿过1#板翅换热器7与2#板翅换热器9换热。高压CO管线10穿过1#板翅换热器7换热。
在新增低压氮气开工管线4上设有新增1号调节阀3。新增高压氮气开工管线6上设有新增2号调节阀5。
一种进行HyCO冷箱开车时节省氮气用量的方法，在高压CO管线10与H2产品管线14上设有新增高压氮气开工管线6，新增高压氮气开工管线6上设有新增2号调节阀5与两个截止阀，在低压CO管线12与粗H2管线13之间设有新增低压氮气开工管线4，在新增低压氮气开工管线4上设有新增1号调节阀3与两个截止阀，HyCO冷箱开车的时候建立起氮气的循环，减少氮气的放空，从而减少了氮气进口补给量，具体方法为：
1、CO压缩机2正产运行以后，第一个CO压缩机2前开车用N2管线1上氮气调节阀开度增加，氮气补入量为1000Nm3/h，第三个CO压缩机2出口压力达到10.9barg以后，将膨胀机8启动；
2、膨胀机8启动以后，渐渐打开1号调节阀3与2号调节阀5；
3、1号调节阀3与2号调节阀5开至55％以后，第一个CO压缩机2前开车用N2管线1上氮气调节阀开度减小至2％，氮气补入量下降至200Nm3/h。
上述的对实施例的描述是为便于该技术领域的普通技术人员能理解和使用发明。熟悉本领域技术的人员显然可以容易地对这些实施例做出各种修改，并把在此说明的一般原理应用到其他实施例中而不必经过创造性的劳动。因此，本发明不限于上述实施例，本领域技术人员根据本发明的揭示，不脱离本发明范畴所做出的改进和修改都应该在本发明的保护范围之内。

Claims (7)

1.一种开车时节省氮气用量的HyCO冷箱系统，包括：通过管路顺序相连的气液分离罐(17)、H2气提塔(22)、N2/CO分离塔(20)、CO/CH4分离塔(21)，所述气液分离罐(17)入口连接合成气原料管线(16)，所述气液分离罐(17)还通过粗H2管线(13)连接变压吸附塔(15)，所述变压吸附塔(15)连接H2产品管线(14)，所述N2/CO分离塔(20)还与N2/CO再沸器(19)连接，所述CO/CH4分离塔(21)还与CO/CH4再沸器(18)连接，
所述CO/CH4分离塔(21)外接低压CO管线(12)，CO压缩机(2)设置有串联的三个，所述低压CO管线(12)连接至第二个CO压缩机(2)，第二个CO压缩机(2)引出CO产品管线(23)，第三个CO压缩机(2)连接高压CO管线(10)，高压CO管线(10)引出两条管线，第一条管线穿过CO/CH4再沸器(18)后进入CO/CH4分离塔(21)，第二条管线经过N2/CO再沸器(19)后与低低压CO管线(11)接通，所述低低压CO管线(11)进入第一个CO压缩机(2)，所述第一个CO压缩机(2)前还连接开车用N2管线(1)，
其特征在于，所述低压CO管线(12)与粗H2管线(13)之间设有新增低压氮气开工管线(4)，所述高压CO管线(10)与H2产品管线(14)上设有新增高压氮气开工管线(6)，所述高压CO管线(10)与低低压CO管线(11)之间连接有膨胀机(8)，所述高压CO管线(10)与膨胀机(8)之间还引出第三条管线，该第三条管线连接至H2气提塔(22)。
2.根据权利要求1所述的一种开车时节省氮气用量的HyCO冷箱系统，其特征在于，所述低低压CO管线(11)先后穿过2#板翅换热器(9)与1#板翅换热器(7)换热。
3.根据权利要求1所述的一种开车时节省氮气用量的HyCO冷箱系统，其特征在于，所述合成气原料管线(16)先后穿过1#板翅换热器(7)与2#板翅换热器(9)换热。
4.根据权利要求1所述的一种开车时节省氮气用量的HyCO冷箱系统，其特征在于，所述高压CO管线(10)穿过1#板翅换热器(7)换热。
5.根据权利要求1所述的一种开车时节省氮气用量的HyCO冷箱系统，其特征在于，在新增低压氮气开工管线(4)上设有新增1号调节阀(3)。
6.根据权利要求1所述的一种开车时节省氮气用量的HyCO冷箱系统，其特征在于，所述新增高压氮气开工管线(6)上设有新增2号调节阀(5)。
7.一种采用权利要求1-6中任一项所述系统进行HyCO冷箱开车时节省氮气用量的方法，其特征在于，在所述高压CO管线(10)与H2产品管线(14)上设有新增高压氮气开工管线(6)，所述新增高压氮气开工管线(6)上设有新增2号调节阀(5)与两个截止阀，在所述低压CO管线(12)与粗H2管线(13)之间设有新增低压氮气开工管线(4)，在新增低压氮气开工管线(4)上设有新增1号调节阀(3)与两个截止阀，
HyCO冷箱开车的时候建立起氮气的循环，减少氮气的放空，从而减少了氮气进口补给量，具体方法为：
1、CO压缩机(2)正产运行以后，第一个CO压缩机(2)前开车用N2管线(1)上氮气调节阀开度增加，氮气补入量为1000Nm3/h，第三个CO压缩机(2)出口压力达到10.9barg以后，将膨胀机(8)启动；
2、膨胀机(8)启动以后，渐渐打开1号调节阀(3)与2号调节阀(5)；
3、1号调节阀(3)与2号调节阀(5)开至55％以后，第一个CO压缩机(2)前开车用N2管线(1)上氮气调节阀开度减小至2％，氮气补入量下降至200Nm3/h。
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