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CN111852618A - 一种在线再生离线清灰船舶尾气处理系统及方法 - Google Patents

一种在线再生离线清灰船舶尾气处理系统及方法 Download PDF

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CN111852618A
CN111852618A CN202010689164.5A CN202010689164A CN111852618A CN 111852618 A CN111852618 A CN 111852618A CN 202010689164 A CN202010689164 A CN 202010689164A CN 111852618 A CN111852618 A CN 111852618A
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CN111852618B (zh
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葛春亮
戴豪波
刘寒梅
张力
丁得龙
方琳
刘璐
张威
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Zhejiang Tiandi Environmental Protection Technology Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/025—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust
    • F01N3/0253—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust adding fuel to exhaust gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/0232—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles removing incombustible material from a particle filter, e.g. ash
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/027—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using electric or magnetic heating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
    • F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2590/00—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines
    • F01N2590/02—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for marine vessels or naval applications

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Abstract

本发明涉及在线再生离线清灰船舶尾气处理系统，包括入口阀、节气阀、可燃气及颗粒物处理组合装置、出口阀、还原剂计量喷射装置、SCR装置、压缩空气阀和过滤器；可燃气及颗粒物处理组合装置入口总管和出口总管上分别设置入口阀和出口阀；可燃气及颗粒物处理组合装置由若干个组合装置单元组成，每个组合装置单元从下往上依次安装有电加热器、DOC催化剂和DPF催化剂，每个组合装置单元本体安装有差压变送器，每个组合装置单元出口安装有温度开关。本发明的有益效果是：本发明通过可燃气及颗粒物处理组合装置、压缩空气阀和颗粒物过滤器，实现在线再生和离线清灰的目的，去除尾气中的气态和固态污染物，且能耗低，再生方便。

Description

一种在线再生离线清灰船舶尾气处理系统及方法
技术领域
本专利涉及船舶尾气处理技术领域，具体涉及一种可再生船舶尾气处理系统。
背景技术
船舶尾气排放是港口城市和内陆河地区空气污染的主要来源之一，随着航运业的发展，船舶尾气排放严重影响空气质量，对环境和人体健康带来极大负面影响，因此控制船舶尾气污染物排放迫在眉睫。
DPF+SCR+DOC是目前较为常用的船舶尾气综合处理系统。但是船舶发动机燃烧的油品较差，尾气中颗粒物和二氧化硫较高，严重影响DOC催化剂、DPF催化剂的性能，需要定期进行再生，不可燃的颗粒物需要进行定期清理。常规的，通过外环境提高烟气温度使所收集颗粒燃烧的主动再生系统是目前较为主流的再生方法。普遍地，DPF采用喷油燃烧再生，这种方式系统复杂，需要不断的消耗燃油，而且对喷油的雾化效果和布置条件要求极高，对于大流量的尾气处理系统，很难均匀喷射。同时，不可燃颗粒物的清理需要拆除返厂清灰。严重影响船舶的连续运行。
发明内容
本发明的目的是克服现有技术中的不足，提供一种在线再生离线清灰船舶尾气处理系统及方法，该船舶尾气处理系统可以综合处理船舶发动机的尾气，并在系统运行过程中实现DPF装置的在线再生且不增加大量能耗，延长船舶尾气处理系统的使用寿命，同时可快速清理不可燃颗粒物，保证船舶的连续运行。
这种在线再生离线清灰船舶尾气处理系统，包括入口阀、节气阀、可燃气及颗粒物处理组合装置、出口阀、还原剂计量喷射装置、SCR装置、压缩空气阀和过滤器；可燃气及颗粒物处理组合装置入口总管和出口总管上分别设置入口阀和出口阀；可燃气及颗粒物处理组合装置由若干个组合装置单元组成，每个组合装置单元从下往上依次安装有电加热器、DOC催化剂和DPF催化剂，每个组合装置单元本体安装有差压变送器，每个组合装置单元出口安装有温度开关；每个组合装置单元入口处设置节气阀，当节气阀介入时，使得一定量的尾气进入组合装置单元，并在电加热器的作用下得到升温，升温温度在500℃-600℃；可燃气及颗粒物处理组合装置并联安装颗粒物过滤器；可燃气及颗粒物处理组合装置出口总管上安装有压缩空气阀，用于在清灰时，往组合装置单元输送压缩空气，保证清灰效果；出口阀出口连接SCR装置入口，SCR装置出口通向外排大气。
作为优选：节气阀的节气阀阀板根据相邻组合装置单元的差压进行开孔，开孔率保持在5％-25％。
作为优选：颗粒物过滤器入口和出口处分别设置过滤器入口阀和过滤器出口阀，在清灰工况下，开启过滤器入口阀和过滤器出口阀，使得被压缩空气清出的不可燃颗粒在颗粒物过滤器中得到清除。
作为优选：出口阀位于压缩空气阀后端。
这种在线再生离线清灰船舶尾气处理系统的处理方法，包括以下步骤：
S1、正常运行工况下，尾气经过可燃气及颗粒物处理组合装置，去除尾气中的可燃气和颗粒物，然后经原剂计量喷射装置喷射还原剂后进入SCR装置，去除尾气中的氮氧化物，最后排入大气；
S2、当可燃气及颗粒物处理组合装置的某一个组合装置单元差压上升到高值时，打开对应的节气阀，同时开启电加热器，使可燃气及颗粒物处理组合装置得到再生；
S3、当可燃气及颗粒物处理组合装置整体差压长期维持在高位时，关闭入口阀和出口阀，打开压缩空气阀，通入压缩空气以清理可燃气及颗粒物处理组合装置内的不可燃颗粒物，并在颗粒物过滤器中得到收集。
本发明的有益效果是：本发明通过可燃气及颗粒物处理组合装置、压缩空气阀和颗粒物过滤器，实现在线再生和离线清灰的目的，去除尾气中的气态和固态污染物，且能耗低，再生方便。
附图说明
图1为本专利的工艺系统及实现方法示意图；
图2为本专利的节气阀阀板结构开孔示意图；
图3为本专利的可燃气及颗粒物处理组合装置示意图。
附图标记说明：1-入口阀、2-节气阀、21-节气阀阀板、3-可燃气及颗粒物处理组合装置、31-电加热器、32-DOC催化剂、33-DPF催化剂、34-差压变送器、35-温度开关、4-出口阀、5-还原剂计量喷射装置、6-SCR装置、7-压缩空气阀、8-过滤器入口阀、9-颗粒物过滤器、10-过滤器出口阀。
具体实施方式
下面结合实施例对本发明做进一步描述。下述实施例的说明只是用于帮助理解本发明。应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以对本发明进行若干改进和修饰，这些改进和修饰也落入本发明权利要求的保护范围内。
作为一种实施例，本专利提供一种在线再生离线清灰船舶尾气处理系统，包括入口阀1、节气阀2、可燃气及颗粒物处理组合装置3、出口阀4、还原剂计量喷射装置5、SCR装置6、压缩空气阀7、过滤器入口阀8、颗粒物过滤器9、过滤器出口阀10等。
可燃气及颗粒物处理组合装置3由若干个组合装置单元组成，每个组合装置单元从下往上依次安装有电加热器31、DOC催化剂32、DPF催化剂33，每个组合装置单元本体安装差压变送器34，每个组合装置单元出口安装温度开关35。正常运行工况下，尾气从发动机出来后，经过入口阀1，被均匀引入可燃气及颗粒物处理组合装置3，去除烟气中的可燃气和颗粒物，然后经还原剂计量喷射装置5喷射还原剂后进入SCR装置6，去除尾气中的氮氧化物，最后排入大气。
每个组合装置单元入口处设置节气阀2。节气阀阀板21根据相邻组合装置单元的差压进行开孔，开孔率保持在5％-25％。当可燃气及颗粒物处理组合装置3的某一个组合装置单元差压上升到高值时，介入对应的节气阀2，使得一定量的尾气进入组合装置单元，同时开启电加热器31，尾气温度上升至500℃-600℃，使可燃气及颗粒物处理组合装置3得到再生。
可燃气及颗粒物处理组合装置3出口总管上安装压缩空气阀7。可燃气及颗粒物处理组合装置3并联安装颗粒物过滤器9，颗粒物过滤器9入口和出口处分别安装过滤器入口阀8和过滤器出口阀10。当可燃气及颗粒物处理组合装置3整体差压长期维持在高位时，关闭入口阀1和出口阀4，打开压缩空气阀7，开启，并维持1min-3min，然后快速开启过滤器出口阀10，使得系统内的压缩空气瞬间膨胀释放，并持续输入压缩空气，以清理可燃气及颗粒物处理组合装置3内的不可燃颗粒物，在颗粒物过滤器9中得到收集。从而实现清灰的目的。
该系统可以去除尾气中的气态和固态污染物，同时实现在线再生和离线清灰相耦合，且能耗低，再生方便。

Claims (5)

1.一种在线再生离线清灰船舶尾气处理系统，其特征在于：包括入口阀(1)、节气阀(2)、可燃气及颗粒物处理组合装置(3)、出口阀(4)、还原剂计量喷射装置(5)、SCR装置(6)、压缩空气阀(7)和过滤器(9)；可燃气及颗粒物处理组合装置(3)入口总管和出口总管上分别设置入口阀(1)和出口阀(4)；可燃气及颗粒物处理组合装置(3)由若干个组合装置单元组成，每个组合装置单元从下往上依次安装有电加热器(31)、DOC催化剂(32)和DPF催化剂(33)，每个组合装置单元本体安装有差压变送器(34)，每个组合装置单元出口安装有温度开关(35)；每个组合装置单元入口处设置节气阀(2)；可燃气及颗粒物处理组合装置(3)并联安装颗粒物过滤器(9)；可燃气及颗粒物处理组合装置(3)出口总管上安装有压缩空气阀(7)；出口阀(4)出口连接SCR装置(6)入口，SCR装置(6)出口通向外排大气。
2.根据权利要求1所述的在线再生离线清灰船舶尾气处理系统的处理方法，其特征在于：节气阀(2)的节气阀阀板(21)的开孔率为5％-25％。
3.根据权利要求1所述的在线再生离线清灰船舶尾气处理系统的处理方法，其特征在于：颗粒物过滤器(9)入口和出口处分别设置过滤器入口阀(8)和过滤器出口阀(10)。
4.根据权利要求1所述的在线再生离线清灰船舶尾气处理系统的处理方法，其特征在于：出口阀(4)位于压缩空气阀(7)后端。
5.一种如权利要求1所述的在线再生离线清灰船舶尾气处理系统的处理方法，其特征在于，包括以下步骤：
S1、正常运行工况下，尾气经过可燃气及颗粒物处理组合装置(3)，去除尾气中的可燃气和颗粒物，然后经原剂计量喷射装置(5)喷射还原剂后进入SCR装置(6)，去除尾气中的氮氧化物，最后排入大气；
S2、当可燃气及颗粒物处理组合装置(3)的某一个组合装置单元差压上升到高值时，打开对应的节气阀(2)，同时开启电加热器(31)，使可燃气及颗粒物处理组合装置(3)得到再生；
S3、当可燃气及颗粒物处理组合装置(3)整体差压长期维持在高位时，关闭入口阀(1)和出口阀(4)，打开压缩空气阀(7)，通入压缩空气以清理可燃气及颗粒物处理组合装置(3)内的不可燃颗粒物，并在颗粒物过滤器(9)中得到收集。
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