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CN103432895B - Method and system for processing blockage of heat exchanger of desulfurization system - Google Patents

Method and system for processing blockage of heat exchanger of desulfurization system Download PDF

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CN103432895B
CN103432895B CN 201310429878 CN201310429878A CN103432895B CN 103432895 B CN103432895 B CN 103432895B CN 201310429878 CN201310429878 CN 201310429878 CN 201310429878 A CN201310429878 A CN 201310429878A CN 103432895 B CN103432895 B CN 103432895B
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system
method
processing
blockage
heat
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CN 201310429878
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CN103432895A (en )
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崔亚兵
王伟
任驰
金东春
邵炜
陈彪
李治国
曹志勇
乐园园
毛文利
周晓耘
陆建伟
王万林
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国家电网公司
国网浙江省电力公司电力科学研究院
国电浙江北仑第一发电有限公司
浙江浙能北仑发电有限公司
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Abstract

本发明公开了一种脱硫系统换热器堵塞的治理方法和系统,所述方法包括对脱硫系统中多个预设堵塞治理点进行检查,并判断多个预设堵塞治理点是否在预设治理范围内;若至少一个预设堵塞治理点在预设治理范围内,则对在预设治理范围内的预设堵塞治理点进行治理。 The present invention discloses a heat treatment method for desulfurization system clogging and system, the method comprising the desulfurization system a plurality of predetermined control points clogging check, and determines whether a plurality of predetermined points within a preset plugging Treatment Treatment the range; if at least one predetermined treatment site within a preset plugging control range, then the predetermined range within a predetermined control points control plugging treatment. 具体地,可将换热片、换热器冷端堵塞源即除雾器、换热器热端堵塞源即除尘器等设为堵塞治理点,并及时对所设堵塞治理点采取相应治理措施,如清除换热片堵塞物,清除除雾器堵塞物、调整除雾器负荷变化范围内烟气流速等,在彻底清洗换热片堵塞物的基础上,亦从堵塞物源头治理换热器堵塞。 Specifically, the heat transfer sheet, the heat exchanger cold end to clogging source demister i.e., the hot end of heat exchanger clogging dust from blocking the source control points i.e., plugging and timely control of the set point take control measures , heat exchange fins such as clearing the blockage, the blockage clears the defogger, the defogger load adjustment range of flue gas flow rate, etc., on the basis of thorough cleaning of the heat transfer sheet plug, also control the source of the heat exchanger from blockage blocked. 从而实现了提高治理效果,延长清洗周期、降低清洗费用的目的,同时提高了脱硫系统投运率及机组运行指标。 In order to achieve the purpose of improving treatment effect, extend the cleaning cycle, reduce cleaning costs, while improving the desulfurization system put into operation rate and performance indicators set.

Description

一种脱硫系统换热器堵塞的治理方法和系统 A desulfurization system heat exchanger fouling treatment method and system

技术领域 FIELD

[0001] 本发明属于燃煤机组脱硫系统中设备堵塞治理技术领域,尤其涉及一种脱硫系统换热器堵塞的治理方法和系统。 [0001] The present invention belongs to the technical field clogging fired units desulfurization system control devices, in particular, relates to a method and a system management desulfurization system heat exchanger clogging.

背景技术 Background technique

[0002] 在我国燃煤机组尾部烟气污染物502治理领域,为了抬升脱硫后的湿烟气高度,通常会在脱硫吸收塔后的烟道安装换热器,换热器可以把从脱硫吸收塔出来的烟气从50°C加热到70°C以上,从而达到了抬升烟气污染物排放高度、提高污染物的扩散度、减轻后续烟道腐蚀以及延长烟囱寿命的目的。 [0002] 502 in the area of ​​treatment of the flue gas of coal-fired units contaminants, to the lifting height of the wet flue gas desulfurization after, usually installed in the flue gas heat exchanger after desulfurization absorption tower, the heat exchanger can be absorbed from the desulfurization the tower is heated by flue gas from 50 ° C and above 70 ° C, so as to achieve the emission of pollutant fumes lifting height, increase the diffusion of pollutants, reduce subsequent chimney flue corrosion and extending the life of the object. 但在脱硫系统工作过程中,极易产生换热器的烟尘堵塞问题,从而对脱硫系统正常运行带来了不利影响。 But in the smoke desulfurization system working process, easy to produce heat exchanger clogging problems, so the normal operation of the desulfurization system had a negative impact.

[0003] 目前,换热器堵塞的治理方法主要有以下两种:(1)脱硫系统停运、换热器正常低速运转时,先用低压水不间断冲洗换热器的换热片,使堵塞物出现松动和软化,之后,再用高压水对换热片进行连续冲洗,从而把堵塞物冲洗掉,保证换热片间隙畅通。 [0003] Currently, the treatment methods of plugging the heat exchanger mainly the following two: (1) desulfurization system outage, when the heat exchanger is normally low speed, the first continuous sheet heat exchanger is rinsed with low-pressure water to make soften and loose plugs, after high pressure water to the heat exchanger and then continuously flushed sheet, thereby clog rinsed off, to ensure smooth flow of heat exchange fins gap. 但由于换热器堵塞物具有黏性强、硬度高等物理特性,导致使用低压水软化堵塞物的时间过长。 However, due to the heat exchanger plug sticky strong hardness higher physical properties, resulting in low pressure blockage of the water-softening time is too long. (2)用化学药水代替低压水,在换热器停止运行状态下,人工手持喷枪在换热片顶部喷洒化学药水,化学药水在重力作用下沿换热片流下,并达到换热片底部,一般需进行4次喷洒,每次间隔约4小时,当化学药水将堵塞物软化后再用高压冲洗水冲洗。 (2) instead of low-pressure water with a chemical solution, to stop the running state in the heat exchanger, artificial chemical solution spraying pistol at the top of the heat exchanger plate, the chemical solution flows down along the heat transfer sheet under gravity, and reach the bottom of the heat transfer sheet, spraying normally takes four times, at intervals of about 4 hours, when a chemical solution after the plug soften rinsed with high pressure water rinse.

[0004] 上述两种堵塞治理方法均采用只清除换热片堵塞物的手段,治理手段单一,即仅把换热片上的堵塞物清洗掉,未在其堵塞根源采取治理手段,治标不治本,清洗后不久还会堵塞,治理效果较差,冲洗周期较短,从而增加了堵塞治理费用,进而导致脱硫系统投运率较低,影响了机组的运行指标。 [0004] The above two methods are used to clear clogged control means only plug the heat exchange sheet, a single control means, i.e., only the heat exchange fins on the plug washed away, taken not clog the control means causes, palliative, shortly after cleaning will be blocked, poor treatment effect, shorter rinse cycles, thus increasing the congestion management costs, thus resulting in lower desulfurization system put into operation rate, affecting the performance indicators of the unit.

发明内容 SUMMARY

[0005] 有鉴于此,本发明的目的在于提供一种脱硫系统换热器堵塞的治理方法和系统,以克服上述问题,在彻底清洗掉换热片堵塞物的基础上,从堵塞物源头治理换热器堵塞,提高治理效果,实现延长清洗周期、降低清洗费用,进而提高脱硫系统投运率及提高机组运行指标的目的。 [0005] In view of this, an object of the present invention is to provide a desulfurization system heat exchanger fouling treatment method and system to overcome the above problems, the heat exchanger plate is completely cleaned on the basis of the blockage, the blockage from the control source heat exchanger blocked, the effect of improving governance, achieve extend the cleaning cycle, reduce cleaning costs, thereby increasing the purpose of desulfurization system put into operation rate and improve the operational indicators of the unit.

[0006] 为此,本发明采用如下技术方案: [0006] To this end, the present invention employs the following technical solutions:

[0007] 一种脱硫系统换热器堵塞的治理方法,包括: [0007] A heat treatment method for desulfurization system clogging, comprising:

[0008] 对脱硫系统中的多个预设堵塞治理点进行检查,并判断所述多个预设堵塞治理点是否在预设治理范围内; [0008] The desulfurization system of the plurality of control points in a predetermined clogging check and determine whether the plurality of predetermined management plugging point is within a predetermined control range;

[0009] 若判断结果为至少一个预设堵塞治理点在预设治理范围内,则对在预设治理范围内的预设堵塞治理点进行治理。 [0009] When the judgment result of at least one predetermined treatment site within a preset plugging control range, then the predetermined range within a predetermined control points control plugging treatment.

[0010] 优选的,所述多个预设堵塞治理点包括:高压水冲洗设备、压缩空气吹扫设备、除雾器、除尘器以及换热片。 [0010] Preferably, the plurality of predetermined control points plugging comprising: a high-pressure water washing equipment, air purge apparatus, a defogger, dust and heat transfer sheet.

[0011] 优选的,所述对脱硫系统中的多个预设堵塞治理点进行检查具体包括: [0011] Preferably, the plurality of preset plugging desulfurization system control check point comprises:

[0012] 检查高压水冲洗设备的行程以及所述高压水冲洗设备中高压水的压力,判断高压水冲洗设备的行程是否彻底、高压水的压力是否达到第一预设压力点; [0012] Check limit pressure water washing equipment and said high-pressure water in the high pressure water washing equipment pressure, high-pressure water washing device determines whether the stroke completely, a high-pressure water reaches a first predetermined set point pressure;

[0013] 检查压缩空气吹扫设备的行程以及所述压缩空气吹扫设备中压缩空气的压力,判断压缩空气吹扫设备的行程是否彻底、压缩空气的压力是否达到第二预设压力点; [0013] inspection apparatus blowing compressed air and the stroke of the compressed air pressure of compressed air in the purge apparatus, the compressed air purging device determines whether the stroke completely, the pressure of the compressed air pressure reaches a second predetermined point;

[0014] 检查除雾器堵塞情况及除雾器负荷变化范围内的烟气流速,判断除雾器是否堵塞、烟气流速是否在除雾器工作范围内; [0014] Check the defogger blockage and gas velocity within the load range of the defogger, the defogger is determined not blocked, the gas velocity in the operating range of the defogger;

[0015] 检查除尘器,判断除尘器的效率是否需要提高; [0015] Check the filter, determines the need to improve the efficiency of dust;

[0016] 检查换热片,判断换热片上的堵塞物是否需要清洗。 [0016] The heat transfer sheet inspection, determines whether the heat exchange fins on the plug needs cleaning.

[0017] 优选的,所述若判断结果为至少一个预设堵塞治理点在预设治理范围内,则对在预设治理范围内的预设堵塞治理点进行治理具体包括: [0017] Preferably, if the determination result of at least one predetermined treatment site within a preset plugging control range, the control of a preset range within a preset plugging point management control comprises:

[0018] 若判断结果为高压水冲洗设备的行程不彻底,则调整高压水冲洗设备的行程,使所述高压水冲洗设备的行程彻底;若判断结果为高压水的压力未达到第一预设压力点,则加大高压水的压力至第一预设压力点; [0018] If the determination result is high-pressure water washing equipment is not complete stroke, high-pressure water washing stroke adjusting device, the high-pressure water washing device complete stroke; if the judging result of the high-pressure water does not reach a first predetermined pressure pressure point, to increase the pressure of high-pressure water to a first predetermined set point pressure;

[0019] 若判断结果为压缩空气吹扫设备的行程不彻底,则调整压缩空气吹扫设备的行程,使所述压缩空气吹扫设备的行程彻底;若判断结果为压缩空气的压力未达到第二预设压力点,则加大压缩空气的压力至第二预设压力点; [0019] If the determination result is by blowing compressed air device is not complete stroke is adjusted by blowing compressed air devices stroke, so that the complete stroke of the compressed air purge device; if the judgment result of the compressed air pressure has not reached two predetermined set point pressure, then increase the pressure of the compressed air pressure to a second predetermined point;

[0020] 若判断结果为除雾器堵塞,则清洗除雾器;若判断结果为除雾器负荷变化范围内烟气流速不在除雾器工作范围内,则调整所述烟气流速,以使所述烟气流速在除雾器工作范围内; [0020] If the determination result of clogging the defogger, the defogger cleaning; if the judgment result of the load variation range demister gas velocity is not within the working range of the defogger, the gas velocity is adjusted, so that the flue gas velocity in the operating range of the defogger;

[0021] 若判断结果为需要提高除尘器的效率,则更换除尘器内部设备或增加电场数量,以提尚除尘器的效率; [0021] When the judgment result is the need to improve the efficiency of the precipitator, ESP replace or increased electric field within the device, to provide yet precipitator efficiency;

[0022] 若判断结果为换热片上的堵塞物需要清洗,则对换热片进行彻底清洗。 [0022] If the determination result of the heat exchange fins on the plug needs to be cleaned, the heat transfer sheet to be thoroughly cleaned.

[0023] 优选的,所述对换热片进行彻底清洗具体包括: [0023] Preferably, the thorough cleaning of the heat transfer sheet comprises:

[0024] 将换热片从换热器上取出; [0024] The sheet was removed from the heat exchanger;

[0025] 将换热片浸泡在化学清洗液中,浸泡至换热片上的堵塞物完全软化为止; [0025] The heat transfer sheet was immersed in a chemical cleaning solution, soak until completely softened heat exchange fins on the plug;

[0026] 用高压水对换热片的两面进行冲洗。 [0026] rinsing of the heat exchanger on both sides of the sheet with high pressure water.

[0027] 一种脱硫系统换热器堵塞的治理系统,包括:检查和判断模块、治理模块,其中: [0027] A heat exchanger is clogged desulfurization system management system, comprising: checking and determining module, control module, wherein:

[0028] 所述检查和判断模块,用于对脱硫系统中的多个预设堵塞治理点进行检查,并判断所述多个预设堵塞治理点是否在预设治理范围内; [0028] The inspection and determination module, a plurality of preset plugging desulfurization system management point check and determine whether the plurality of predetermined management plugging point is within a predetermined control range;

[0029] 所述治理模块,用于在判断结果为至少一个预设堵塞治理点在预设治理范围内时,对在预设治理范围内的预设堵塞治理点进行治理。 [0029] The control module for the at least one predetermined determination result is blocked when a preset control point management range of a preset range within a predetermined control points control plugging treatment.

[0030] 优选的,所述检查和判断模块包括: [0030] Preferably, the checking and determining module comprises:

[0031] 第一设备检查模块,用于检查高压水冲洗设备的行程以及所述高压水冲洗设备中高压水的压力,并判断高压水冲洗设备的行程是否彻底、高压水的压力是否达到第一预设压力点; [0031] a first device checking module for checking stroke high-pressure water washing equipment and said high-pressure water washing apparatus of high pressure water, high pressure water rinsing and determines whether the operation is complete the device, the high-pressure water reaches a first preset pressure points;

[0032] 第二设备检查模块,用于检查压缩空气吹扫设备的行程以及所述压缩空气吹扫设备中压缩空气的压力,并判断压缩空气吹扫设备的行程是否彻底、压缩空气的压力是否达到第二预设压力点; [0032] The second device checking module for checking the trip device and the air purge apparatus blowing compressed air pressure of compressed air, and compressed air purging device determines whether the operation is complete, if the pressure of compressed air pressure reaches a second predetermined point;

[0033] 除雾器检查模块,用于检查除雾器堵塞情况及除雾器负荷变化范围内的烟气流速,并判断除雾器是否堵塞、烟气流速是否在除雾器工作范围内; [0033] defogger checking module for checking the defogger blockage and gas velocity within the range of load change defogger, the defogger and determines not blocked, the gas velocity in the operating range of the defogger;

[0034] 除尘器检查模块,用于检查除尘器,并判断除尘器的效率是否需要提高; [0034] precipitator checking module for checking the efficiency of the precipitator, and determines whether it is necessary to improve the precipitator;

[0035] 换热片检查模块,用于检查换热片,并判断换热片上的堵塞物是否需要清洗。 [0035] The heat transfer sheet checking module for checking the heat transfer sheet, and the plug is determined on the heat exchange fins need for cleaning.

[0036] 优选的,所述治理模块包括: [0036] Preferably, the control module comprising:

[0037] 第一设备治理模块,用于在判断结果为高压水冲洗设备的行程不彻底时,调整高压水冲洗设备的行程,使所述高压水冲洗设备的行程彻底;及在判断结果为高压水的压力未达到第一预设压力点时,则加大高压水的压力至第一预设压力点; [0037] The first device management module, the flushing device for stroke determination result is not complete when the high-pressure water, high pressure water to adjust the stroke flushing device, the high-pressure water washing apparatus thoroughly stroke; and the judgment result is a high pressure when water pressure is less than a first predetermined set point pressure, the increased pressure of the high-pressure water to a first predetermined set point pressure;

[0038] 第二设备治理模块,用于在判断结果为压缩空气吹扫设备的行程不彻底时,调整压缩空气吹扫设备的行程,使所述压缩空气吹扫设备的行程彻底;及在判断结果为压缩空气的压力未达到第二预设压力点,则加大压缩空气的压力至第二预设压力点; [0038] The second device management module for stroke determination result is not complete air purging apparatus, purge air adjusting device stroke, the stroke of the compressed air purge apparatus thoroughly; and in determining the results for the pressure of compressed air does not reach the second predetermined pressure point, to increase the pressure of the compressed air pressure to a second predetermined point;

[0039] 除雾器治理模块,用于在判断结果为除雾器堵塞时,清洗除雾器;及在判断结果为除雾器负荷变化范围内烟气流速不在除雾器工作范围内时,调整烟气流速,以使烟气流速在除雾器工作范围内; [0039] defogger control module, configured to, when the judgment result is blocked demister cleaning demister; and when the result of judgment inner demister gas velocity range not load operating range defogger, adjusting the flow rate of the flue gas, so that the gas velocity in the operating range of the defogger;

[0040] 除尘器治理模块,用于在判断结果为需要提高除尘器的效率时,更换除尘器内部设备或增加电场数量,以提高除尘器的效率; [0040] Dust control module, configured to, when the judgment result is the need to improve the efficiency of the precipitator, dust replacement device or increase the number of internal electric field to improve the efficiency of the bag;

[0041] 换热片治理模块,用于在判断结果为换热片上堵塞物需要清洗时,对换热片进行彻底清洗。 [0041] The heat exchange fins management module, configured to, when the determination result is heat exchange fins on the plug needs to be cleaned, on the heat transfer sheet be thoroughly cleaned.

[0042] 本发明实施例提供的脱硫系统换热器堵塞的治理方法,包括对脱硫系统中的多个预设堵塞治理点进行检查,并判断多个预设堵塞治理点是否在预设治理范围内;若判断结果为至少一个预设堵塞治理点在预设治理范围内,则对在预设治理范围内的预设堵塞治理点进行治理。 The method of heat treatment desulfurization system provided by clogging embodiment [0042] of the present invention, the desulfurization system comprises a plurality of preset control point checks plugging and clogging determining a plurality of predetermined control points are preset control range inside; if the judging result of at least one predetermined treatment site within a preset plugging control range, then the predetermined range within a predetermined control points control plugging treatment. 具体实施时,可将换热器的换热片、换热器冷端堵塞源即除雾器、换热器热端堵塞源即除尘器等脱硫系统中可能导致堵塞或增大堵塞程度的设备处设为预设堵塞治理点,并及时对所设堵塞治理点采取相应的堵塞治理措施,例如清除换热片的堵塞物,清除除雾器堵塞物以减小除雾器出口处液滴颗粒物(换热片堵塞物的成分之一)的逃逸量、调整除雾器负荷变化范围内的烟气流速等,在彻底清洗掉换热片堵塞物的基础上,亦从堵塞物源头治理换热器堵塞。 In specific implementation, the heat exchanger may be sheet, the cold end of heat exchanger clogging source demister i.e., the hot end of heat exchanger clogging dust collector source i.e. the desulfurization system and may cause plugging or clogging degree increases at predetermined set points control plugging, blockage and timely control of the set point appropriate congestion control measures taken, for example, clear the blockage of heat exchange fins, clearing clog the demister outlet to reduce the droplet particle demister (one of the heat transfer sheet of the plug component) of the escapement, the defogger and the like to adjust the gas velocity range of load change, on the basis of heat transfer sheet is completely cleaned of the plug, also control the source heat exchanger from blockage clogging.

[0043] 综上,本发明针对不同堵塞因素采取不同的措施进行综合治理,提高了治理效果,延长了清洗周期、降低了清洗费用,同时提高了脱硫系统投运率及机组运行指标,保证了脱硫系统高效、稳定、经济的运行。 [0043] In summary, the present invention is taken for different blockage factors different measures comprehensive management to improve the treatment effect, extend the cleaning cycle, reduce cleaning costs, while improving the desulfurization system put into operation rate and performance indicators set, to ensure that the desulfurization system efficient, stable and economical operation.

附图说明 BRIEF DESCRIPTION

[0044] 为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。 [0044] In order to more clearly illustrate the technical solutions in the embodiments or the prior art embodiment of the present invention, briefly introduced hereinafter, embodiments are described below in the accompanying drawings or described in the prior art needed to be used in describing the embodiments figures some embodiments of the present invention, those of ordinary skill in the art is concerned, without creative efforts, can derive from these drawings other drawings.

[0045] 图1是本发明实施例提供的换热器工作原理示意图; [0045] FIG. 1 is a schematic view of the principle of a heat exchanger operating according to an embodiment of the present invention;

[0046] 图2是本发明实施例一提供的脱硫系统换热器堵塞的治理方法流程图; [0046] FIG 2 is a flowchart of a method of desulfurization control system of a heat exchanger according to a first embodiment of the present invention, the clogging;

[0047] 图3是本发明实施例一提供的脱硫系统换热器堵塞的治理方法中检查和判断过程不意图; [0047] FIG 3 is a heat treatment method for desulfurization system according to a first check of the clogging determination process and embodiment of the present invention is not intended;

[0048] 图4是本发明实施例一提供的脱硫系统换热器堵塞的治理方法中治理过程示意图; [0048] FIG. 4 is a schematic diagram of the process control system desulfurization treatment method of a heat exchanger according to a first embodiment of clogging of the present invention;

[0049] 图5是本发明实施例一提供的对换热器进行冲洗和吹扫的原理示意图; [0049] FIG. 5 is a schematic view of the principle of the flushing and purging the heat exchanger according to a first embodiment of the present invention;

[0050] 图6是本发明实施例一提供的对换热片进行清洗的流程示意图; [0050] FIG. 6 is a schematic flow sheet of cleaning the heat exchanger according to a first embodiment of the present invention;

[0051] 图7是本发明实施例二提供的脱硫系统换热器堵塞的治理系统结构图。 [0051] FIG. 7 is a system configuration diagram of a heat exchanger management desulfurization system according to a second embodiment of the present invention is clogged.

具体实施方式 detailed description

[0052] 为使本发明实施例的目的、技术方案和优点更加清楚,下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例是本发明一部分实施例,而不是全部的实施例。 [0052] In order that the invention object, technical solutions, and advantages of the embodiments more clearly, the following the present invention in the accompanying drawings, technical solutions of embodiments of the present invention are clearly and completely described, obviously, the described the embodiment is an embodiment of the present invention is a part, but not all embodiments. 基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。 Based on the embodiments of the present invention, all other embodiments of ordinary skill in the art without any creative effort shall fall within the scope of the present invention.

[0053] 本发明公开了一种脱硫系统换热器堵塞的治理方法和系统,以下将通过多个实施例对本发明的脱硫系统换热器堵塞的治理方法和系统进行详细说明。 [0053] The present invention discloses a method and system for management desulfurization system heat exchanger clogging, the following methods and system for the management of the desulfurization system of the present invention, clogging of the heat exchanger will be described in detail by means of a plurality of embodiments.

[0054] 在对本发明进行详细说明之前,首先介绍脱硫系统换热器的工作原理以及换热器堵塞的成因。 [0054] Prior to the present invention in detail, first of all describes the principles desulfurization system heat exchanger and the heat exchanger causes of clogging.

[0055] 请参见图1,脱硫系统换热器的工作原理为:从脱硫吸收塔110出来的净烟气(冷烟气)温度约50°C,净烟气从换热器120左半部分的上部(即换热器冷端)进入换热器120,并从其内部换热片间隙穿过,之后进入烟囱;来自锅炉的原烟气温度约130°C,原烟气从换热器120右半部分的下部(即换热器热端)进入换热器120,并从其内部换热片间隙穿过后进入脱硫吸收塔110内进行脱硫净化。 [0055] Referring to FIG. 1, the heat exchanger desulfurization system works as follows: out of the net flue gas desulfurization absorber 110 (cold flue gas) temperature of about 50 ° C, the net flue gas from the heat exchanger portion 120 left the upper portion (i.e. the cold end of the heat exchanger) enters the heat exchanger 120, and passes through the internal heat exchanger plate from the gap, then into the chimney; original boiler flue gas temperature from about 130 ° C, raw flue gas from the heat exchanger a lower portion (i.e., the warm end heat exchanger) 120 into the right half of the heat exchanger 120, and into the desulfurizing absorption tower 110 after desulfurization purge sheet through the gap from the internal heat exchanger. 换热器120左半部分的换热片被来自脱硫吸收塔110的净烟气冷却,而右半部分的换热片被来自锅炉的高温原烟气加热,当换热器120以每分钟约1.25圈的转速旋转时,净烟气不断被加热,而来自锅炉的原烟气不断被冷却,净烟气被加热后出口温度一般大于80°C,原烟气被冷却后出口温度一般小于110°C。 Heat exchange fins 120 of the heat exchanger is the left half of the net from the flue gas desulphurization absorber 110 is cooled, and the right half of the heat transfer sheet is heated by flue gas from a high temperature and the boiler, when the heat exchanger from about 120 per minute the rotational speed of the rotating ring 1.25, the net flue gas continue to be heated, and the original flue gas from a boiler is constantly cooled, the net flue gas exit temperature to be heated is generally greater than 80 ° C, the original flue gas is cooled outlet temperature is generally less than 110 ° C.

[0056] 循环泵130把石灰石浆液从脱硫吸收塔110的浆液池中打到脱硫吸收塔110上部,并通过喷淋层喷洒浆液,此时原烟气逆流而上,与浆液接触并发生化学反应,从而原烟气中的二氧化硫被去除掉成为净烟气。 [0056] The circulating pump 130 hit the limestone slurry from the desulfurization absorber slurry tank 110 of the desulfurization tower upper portion 110, and the slurry is sprayed through the spray level, flue gas upstream of the original at this time, and in contact with the slurry chemical reaction so that the original sulfur dioxide in the flue gas is removed a net flue gas. 净烟气穿过布置于脱硫吸收塔110顶部的除雾器时,其携带的大部分水分和浆液被除雾器分离,继而含少量水分和浆液的净烟气进入换热器120,此时净烟气中携带的水分和浆液中的颗粒物会落在换热器120中换热片的表面,其中,颗粒物包括CaSO4.2H20、CaSO3、烟气中的灰分等。 When the net desulfurization of flue gas through mist eliminator 110 is disposed on top of the absorption column, which carries most of the water and the slurry is separated demister, then the net flue gas containing a small amount of water and slurry entering heat exchanger 120, at this time the net and the flue gas carried in water slurry particles will fall on the surface of the heat exchanger 120 in heat transfer sheet, wherein the particulate matter comprises CaSO4.2H20, CaSO3, ash in the flue gas. 颗粒物粘在换热片的初期,通过布置在换热器120上部高压水冲洗设备中的高压水可以将颗粒物冲洗掉。 Initial particles adhered to the heat transfer sheet, the particles may be flushed through the heat exchanger 120 is disposed in the upper portion of the high-pressure water in the high pressure water washing equipment. 但若未及时冲洗,随着时间的推移,累积物会越来越多,甚至深入换热片内部,且累积物的物理特性也会发生变化,由最初的软、散特性颗粒物变成坚硬的堵塞物,将换热片的间隙堵掉。 But if not promptly wash, over time, the buildup will be more and more, even deep inside the heat exchanger plate, and the physical characteristics of the buildup will change, become soft from the initial, bulk properties of particulate matter hard plug, the heat transfer sheet of the gap blocking off. 换热器120的差压由最初的300Pa左右上升到700Pa,甚至更高。 Differential heat exchanger 120 is increased from the initial approximately 300Pa to 700Pa, or even higher. 换热器120差压高、堵塞严重时会引起脱硫系统增压风机喘振跳机,甚至影响锅炉主机的安全运行。 Heat exchanger 120 high differential pressure, can cause desulfurization system booster fan when congested surge tripping, and even affect the safe operation of the boiler host.

[0057] 从锅炉电除尘来的原烟气携带电除尘未除掉的灰分进入换热器120,而换热片从净烟气部分旋转过来时,温度低、湿度大,该情况下原烟气中的灰分极易黏附在换热器120下端,此时通过布置在换热器120下部的压缩空气吹扫设备比较容易将黏附在换热器120的灰分吹扫掉,但若未及时将将黏附在换热片上的灰分吹扫掉,随着时间的推移,灰分不断的积累,其物理特性会发生巨大变化,会结成类似水泥一样具有巨大黏性和硬度的硬块,将换热器120下部堵塞,从而造成换热器120差压急剧增加,给脱硫系统和主机系统运行造成安全隐患。 [0057] ESP carried from the boiler to the ESP does not remove original flue ash enters the heat exchanger 120, the heat transfer sheet during rotation of the flue gas up from the net portion, low temperature, high humidity, in this case raw tobacco ash gas easily adheres to the lower end of the heat exchanger 120, disposed in the case 120 by the lower portion of the heat exchanger by blowing compressed air to the device relatively easily adhered ash heat exchanger 120 is purged out, but if not promptly the adhesion of the heat transfer sheet ash was purged out, over time, the constant accumulation of ash, its physical properties vary great, will form a cement-like lumps as having great hardness and viscosity, the heat exchanger 120 the lower congestion, resulting in a sharp increase in differential pressure heat exchanger 120, pose a safety hazard desulfurization system and the host system to run.

[0058] 实施例一 [0058] Example a

[0059] 本发明实施例一公开了一种脱硫系统换热器堵塞的治理方法,如图2所示,该方法包括: [0059] Example embodiments of the present invention discloses a control method for a desulfurization system heat exchanger clogging, as shown in FIG. 2, the method comprising:

[0060] S1:对脱硫系统中的多个预设堵塞治理点进行检查,并判断所述多个预设堵塞治理点是否在预设治理范围内。 [0060] S1: a plurality of preset plugging desulfurization system management point check and determine whether the plurality of predetermined control points are blocked within a predetermined control range.

[0061] 本发明实施例中,基于针对不同堵塞因素采取不同措施进行综合治理的思想,对脱硫系统运行时原烟气以及净烟气的行程进行研宄,全面分析了脱硫系统中易导致堵塞或增大堵塞程度的设备,查找堵塞源。 [0061] Embodiments of the present invention, based on different measures to be taken for different blockage factors in the comprehensive management of thinking, the original flue and net flue gas desulfurization system run time travel study based on a comprehensive analysis of the desulfurization system easily lead to blockage or increasing the degree of clogging of the apparatus, clogging source lookup. 从而,本实施例除了将换热片设为堵塞治理点,还将高压水冲洗设备、压缩空气吹扫设备、除雾器以及除尘器等多处设为堵塞治理点。 Thus, the present embodiment except that the heat exchange fins to control plugging point, also high-pressure water washing equipment, by blowing compressed air equipment, dust and mist eliminators to plugging so many control points.

[0062] 其中,请参见图3,步骤SI具体包括: [0062] where, see Figure 3, SI step comprises:

[0063] Sll:检查高压水冲洗设备的行程以及所述高压水冲洗设备中高压水的压力,判断高压水冲洗设备的行程是否彻底、高压水的压力是否达到第一预设压力点。 [0063] Sll: Check stroke high pressure water washing apparatus and the high-pressure water in the high pressure water washing equipment pressure, high-pressure water washing device determines whether the stroke completely, a high-pressure water reaches a first predetermined set point pressure.

[0064] S12:检查压缩空气吹扫设备的行程以及所述压缩空气吹扫设备中压缩空气的压力,判断压缩空气吹扫设备的行程是否彻底、压缩空气的压力是否达到第二预设压力点。 [0064] S12: Check the travel device, and the air purge apparatus blowing compressed air pressure of compressed air, the compressed air purging device determines whether the stroke completely, a second compressed air pressure reaches a preset pressure point .

[0065] S13:检查除雾器堵塞情况及除雾器负荷变化范围内的烟气流速,判断除雾器是否堵塞、烟气流速是否在除雾器工作范围内。 [0065] S13: Check the flue gas velocity within the demister blockage and load range of the defogger, the defogger is determined not blocked, and gas velocity in the operating range of the defogger.

[0066] S14:检查除尘器,判断除尘器的效率是否需要提高。 [0066] S14: Check dust, precipitator efficiency is determined whether it is necessary to improve.

[0067] S15:检查换热片,判断换热片上堵塞物是否需要清洗。 [0067] S15: Check plate heat exchanger, the heat exchanger is determined whether the cleaning sheet blockage.

[0068] S2:若判断结果为至少一个预设堵塞治理点在预设治理范围内,则对在预设治理范围内的预设堵塞治理点进行治理。 [0068] S2: If the result of determination of at least one predetermined treatment site within a preset plugging control range, then the predetermined range within a predetermined control points control plugging treatment.

[0069] 当多个预设堵塞治理点中任意一个或多个在预设治理范围内时,对需进行治理的预设堵塞治理点进行相应治理,例如换热片堵塞物严重时需对换热片进行清洗,除雾器堵塞时清洗除雾器,除雾器负荷变化范围内的烟气流速不在除雾器工作范围内时调整烟气流速等等。 [0069] When a plurality of predetermined control points of any plugging one or more of the preset control range, the need for preset control points corresponding to control congestion control, for example when the need for changing heat transfer sheet was severely clogged thermal cleaning sheet, the cleaning mist eliminator demister when clogged, the flow rate of the flue gas demister load adjustment range is not within the demister gas velocity operating range and the like.

[0070] 基于此,请参见图4,步骤S2具体包括: [0070] Based on this, see Figure 4, step S2 comprises:

[0071] S21:若判断结果为高压水冲洗设备的行程不彻底,则调整高压水冲洗设备的行程,使所述高压水冲洗设备的行程彻底;若判断结果为高压水的压力未达到第一预设压力点,则加大高压水的压力至第一预设压力点。 [0071] S21: If the determination result is high-pressure water washing equipment is not complete stroke, the stroke adjusting device of high pressure water flushing, the high-pressure water washing device complete stroke; if the judging result of the pressure of high-pressure water does not reach the first predetermined set point pressure, the increased pressure of the high-pressure water to a first predetermined set point pressure.

[0072] S22:若判断结果为压缩空气吹扫设备的行程不彻底,则调整压缩空气吹扫设备的行程,使所述压缩空气吹扫设备的行程彻底;若判断结果为压缩空气的压力未达到第二预设压力点,则加大压缩空气的压力至第二预设压力点。 [0072] S22: If the judgment result is by blowing compressed air device is not complete stroke is adjusted by blowing compressed air stroke device, the stroke device thoroughly purged air; if the judgment result of the compressed air pressure is not reaches a second predetermined set point pressure, the increased pressure of the compressed air to a second predetermined set point pressure.

[0073] 如图5所示,由于换热器为匀速缓慢旋转装置,因此其换热片的堵塞情况在同一半径上基本相似,通过对众多机组脱硫换热器的堵塞情况进行调研发现,换热器中心地带和边缘地带堵塞比较严重,且较之于边缘地带,中心地带堵塞相对较轻。 [0073] As shown, since the heat exchanger is uniform slowly rotating means, thus clogging the heat transfer sheet 5 is substantially similar to the same radius, by a number of congestion desulfurization unit heat exchangers to conduct research found that, for heat central and edge of serious clogging, and compared to the edge zone, the heart is relatively light blockage. 高压水冲洗设备和压缩空气吹扫设备都是伸缩设备,当需要冲洗或吹扫时,其设备行程分别为a — b和d — C,即高压水冲洗设备在换热器上部沿a — b的方向伸缩,并向下对换热器反复冲洗;相应地,压缩空气吹扫设备在换热器下部沿d — c的方向伸缩,并向上对换热器反复吹扫。 High-pressure water washing equipment and compressed air purging device is telescopic device, when required flushing or purging device which travel respectively a - b and d - C, i.e., high pressure water washing apparatus along the heat exchanger in the upper portion of a - b stretching direction, and the repeated washing of the heat exchanger; accordingly, by blowing compressed air along the heat exchanger device in the lower portion d - c stretching direction, of the heat exchanger and the sweep repeated. 若高压水冲洗设备和压缩空气吹扫设备行程不彻底,会造成堵塞物较为严重的中心地带和边缘地带无法冲洗和吹扫到。 If the high-pressure water washing equipment and compressed air purging device stroke is not complete, blockage can cause serious heart and not the edge of the flushing and purging. 本实施例采取如下措施避免上述情况:在换热器停运时,启动高压水冲洗设备和压缩空气吹扫设备,无需冲洗介质,只检查设备行程是否到位,是否能够到达中心地带和边缘地带。 Take the following measures of the present embodiment to avoid the above situation: when the outage heat exchanger, high-pressure water washing equipment and start blowing compressed air devices without rinsing medium, only the travel inspection equipment is in place, and is able to reach the edge of the heart. 如果设备行程不彻底,则对设备进行检修,以保证冲洗和吹扫效果。 If the device does not complete the trip, the device inspected to ensure flushing and purging effect.

[0074] 换热器顶部高压水冲洗设备中的高压冲洗水是保证换热器有效运行的重要手段。 [0074] the top of the high pressure heat exchanger device in the high-pressure flushing water rinse water is an important means to ensure effective operation of the heat exchanger. 当现有的高压冲洗水压力无法有效冲洗掉换热片上的堵塞物时,本实施例增加高压冲洗水的压力,在更大的冲击力作用下,黏附在换热器上的堵塞物能够更大程度地被冲洗掉,同时在堵塞物黏附于换热片初期,其物理特性没有发生变化,即其具有软、散特性,此时冲洗效果比较好,可以加大高压冲洗水的冲洗频次,把尚未黏附结实的堵塞物及时冲洗掉。 When a conventional high-pressure washing water pressure can not be effectively rinsed off the plug on the heat transfer sheet, the present embodiment increases the high-pressure flushing water, at a larger impact force, adhesion plug on the heat exchanger can be more be washed away to a large extent, while the plug adheres to the initial heat exchange fins, does not change its physical properties, i.e., having a soft, dispersion characteristics, this time is better washing effect, high pressure may increase the frequency of flushing water flushing, yet strong adhesion to the obstruction promptly washed away.

[0075] 换热器底部压缩空气吹扫设备中的压缩空气是吹扫掉黏附在换热片上烟尘的重要手段。 [0075] the bottom of the heat exchanger by blowing compressed air purging apparatus is an important means of compressed air adhere to the heat transfer sheet off the soot. 烟气中灰分(烟尘)比较干燥、重量轻,对压缩空气的吹扫比较敏感。 Ash content in the flue gas (smoke) dry, lighter weight, more sensitive to the compressed air purge. 烟尘黏附在换热片初期,其黏性、硬度小,比较容易被吹扫掉,但随着时间的推移,其物理特性发生变化,结成的硬块物理特性与水泥极为相似,很难被吹扫和冲洗掉,针对此种情况,本实施例具体采用提高压缩空气压力的措施,同样也可以增加吹扫频次,有条件的机组甚至可以采用连续吹扫的方法,以保证吹扫效果,减轻烟尘对换热器的堵塞。 In the early heat transfer sheet dust adhesion, which viscosity, hardness is small, relatively easily purged out, but over time, a change in its physical properties, physical properties and form a lump of cement is very similar, is difficult to be blown sweep and wash off, in such cases, the present embodiment uses the specific measures to improve the compressed air pressure also can be increased blowing sweep times, even the method of conditional continuous purging unit may be employed to ensure that the purge effect, reduce soot clogging of the heat exchanger.

[0076] S23:若判断结果为除雾器堵塞,则清洗除雾器;若判断结果为除雾器负荷变化范围内的烟气流速不在除雾器工作范围内,则调整所述烟气流速,以使所述烟气流速在除雾器工作范围内。 [0076] S23: If the judgment result is blocked defogger, the defogger cleaning; if the judgment result of the load change demister gas velocity is not within the scope of the defogger operating range, adjusting the gas velocity , so that the gas velocity in the operating range of the defogger.

[0077] 进入换热器冷端的净烟气携带颗粒物是造成换热器上部堵塞的重要原因,其携带的颗粒物是从脱硫吸收塔中除雾器逃逸而来,因此可通过对换热器冷端堵塞源即除雾器进行治理以减轻换热片堵塞。 [0077] The cold end of the heat exchanger into the flue gas carrying particulate matter net is an important cause of upper heat exchanger clogging, carrying particulate matter from escaping from the desulfurization absorption tower demister, it is possible for the heat exchanger by cold i.e. source line blocking demister to reduce heat transfer sheet jam treatment. 显然,减小除雾器出口液滴颗粒物的逃逸量,是减轻换热器堵塞的重要手段。 Clearly, reducing the droplet demister outlet escapement particulate matter, it is an important means to reduce clogging of the heat exchanger.

[0078] 本实施例具体采用如下治理措施:检查除雾器是否堵塞,若除雾器堵塞,其性能会急剧下降、工作环境恶化,从而导致颗粒物逃逸量增加,大量的颗粒物被带入换热器中,故当除雾器堵塞时,及时清除除雾器的堵塞物,保证除雾器正常工作。 [0078] Specific embodiments according to the present embodiment using the following control measures: Check the defogger is blocked, clogged if demister, a sharp decline in its performance, the deterioration of the working environment, leading to an increased amount of particulate matter from escaping, a large amount of particulate matter is brought into heat vessel, so that when defogger blocked, timely removal of blockages defogger, the defogger ensure normal work. 另一方面本实施例核对脱硫吸收塔中除雾器负荷变化范围内逆流烟气流速是否在除雾器工作范围内,当烟气流速过大超过除雾器的最大工作流速时,烟气中被除雾器捕集到的液滴来不及落入脱硫吸收塔便被重新携带入烟气中,从而导致大量的液滴及颗粒物进入后续烟道及换热器中;当烟气流速过小时,烟气中携带的浆液颗粒物无法甩在除雾器上,导致除雾器无法有效捕集到烟气中携带的浆液颗粒物,从而使得烟气中携带的大量浆液颗粒物进入换热器中,导致换热器堵塞加剧。 Another aspect of this embodiment check the desulfurization absorption column countercurrent gas velocity within the range of load change demister defogger is within the operating range, when the gas velocity exceeds the maximum operating flow rate is too large defogger, smoke trapped mist eliminator droplet is too late to fall within the desulfurizing absorption tower will be carried back into the flue gas, resulting in large droplets and particles into the flue and the subsequent heat exchanger; when the gas velocity is too small, smoke particles carried in the slurry not thrown on the demister, mist eliminator leads into the flue gas can not effectively trap particulate matter carried in the slurry, the slurry so that a large amount of particulate matter carried in the flue gas enters the heat exchanger, resulting in change hot plugging intensified. 当然,也可以更换除雾器,用更加高效的除雾器替代原有除雾器,增加除雾器的效能,进一步减小除雾器出口烟气中浆液颗粒的逃逸量,从而降低进入换热器的颗粒物总量,减缓换热器堵塞。 Of course, the defogger can be replaced, replace the original defogger with the defogger more efficient, increasing the effectiveness of the defogger, to further reduce the amount of escaping flue gas particles in the slurry demister outlet, thereby reducing the change into the the total amount of heat of the particles, clogging of the heat exchanger slow.

[0079] S24:若判断结果为需要提高除尘器的效率,则更换除尘器内部设备或增加电场数量,以提尚除尘器的效率。 [0079] S24: If the judgment result is the need to improve the efficiency of dust, dust replace or increased electric field within the device, to provide yet precipitator efficiency.

[0080] 进入换热器热端的原烟气中携带烟尘是造成换热器下部堵塞的重要原因。 [0080] the original flue gas entering the heat exchanger warm end carries a lower soot is important cause clogging of the heat exchanger. 当原烟气中烟尘浓度较高时,从热端进入换热器的烟尘总量就增大,大量的烟尘短时间急剧聚集在换热器上,并且与换热片上的水发生物理和化学反应,即生成黏性大、硬度高似水泥一样的物质,该物质一经生成便很难被吹扫和清洗掉。 When the original high dust concentration in the flue gas, the total amount of dust entering the heat exchanger from the hot end is increased, a large amount of smoke sharply short gathered on the heat exchanger, and physical and chemical heat exchange with the water on the sheet the reaction, which generates a large viscosity, hardness of the same cement-like substance that has been created, it is difficult to be purged and cleansed. 由于原烟气中的烟尘来自锅炉除尘器,因此提高除尘器的效率,降低烟气中烟尘浓度是减小进入换热器热端烟尘量,缓解换热器堵塞的重要手段。 Since the original flue gas from the boiler precipitator dust, thereby improving the efficiency of the precipitator and reduce the dust concentration in flue gas entering the heat exchanger is to reduce the amount of soot hot end, an important means to alleviate clogging the heat exchanger.

[0081] 本实施例具体通过改造现有除尘器的运行方法、更换其内部设备、增加其电场数量来提高除尘器的除尘效率,以降低出口烟尘浓度。 [0081] Specific embodiments according to the present embodiment by a method of retrofitting existing precipitator operation, replacement of the internal equipment, increasing the number field to improve dust collection efficiency, in order to reduce the dust concentration in the outlet. 当然,不限于上述措施,在空间和资金允许的情况下,也可以在除尘器末端电场采用旋转电极或者增加一级湿式电除尘等新技术来提高除尘器总体除尘效率,以降低换热器入口烟尘浓度。 Of course, not limited to the above measures, and in the case where the space of funds, may be employed in the precipitator electrode tip rotating electric field or a new technology to increase wet electrostatic precipitator dust and the like to improve the overall collection efficiency, to reduce the heat exchanger inlet dust concentration.

[0082] S25:若判断结果为换热片上堵塞物需要清洗,则对换热片进行彻底清洗。 [0082] S25: If the determination result of the blockage on the heat exchanger needs cleaning sheet, the heat transfer sheet to be thoroughly cleaned.

[0083] 其中,如图6所示,对换热片进行彻底清洗具体包括: [0083] wherein, as shown in FIG. 6, the heat transfer sheet be thoroughly cleaned comprises:

[0084] S61:将换热片从换热器上取出。 [0084] S61: The sheet was removed from the heat exchanger.

[0085] S62:将换热片浸泡在化学清洗液中,浸泡至换热片上堵塞物完全软化为止。 [0085] S62: The heat transfer sheet was immersed in a chemical cleaning solution onto the heat soak until the sheet jam was completely softened.

[0086] S63:用高压水对换热片的两面进行冲洗。 [0086] S63: on the both surfaces of the heat exchanger with high pressure water rinsing sheet.

[0087] 当换热器堵塞严重导致脱硫系统无法正常运行时,需要停运脱硫系统,对换热器进行全面检查并对堵塞物进行彻底清洗。 [0087] When the heat exchanger is blocked because of serious desulfurization system can not function properly, you need outage desulfurization system, heat exchangers conduct a comprehensive inspection and obstruction thorough cleaning. 现有技术中化学药水清洗方式,首先,换热片未被取出,人工在换热器内部换热片上喷洒化学药水软化堵塞物,之后再用高压冲洗水清洗。 Chemical solution prior art cleaning method, first, the heat transfer sheet is not removed, an artificial chemical solution spraying softening a plug in the internal heat exchanger plate, then after high pressure washing water. 此种方式软化堵塞物时需要的喷洒次数较多,化学药水从换热片流下后直接进入集液池,经处理后被抛弃,从而造成了极大的浪费,没有对化学药水进行重复利用,且该清洗方式下换热器上半部分清洗的比较干净,中部和下部的清理受到了极大影响。 When such a large number of spraying plugs embodiment softening required chemical solution into the sump directly from the heat transfer sheet stream, after being processed by discarded, resulting in a great waste, no repeated use of chemical solution, the cleaning method and the lower half portion of the heat exchanger cleaned relatively clean, middle and lower cleaning heavily influenced.

[0088] 针对此种情况,本实施例在对换热器进行清洗时,将换热片从换热器中取出,并将换热片浸泡在化学清洗液(化学药水)中,当浸泡至堵塞物完全软化后,再用高压冲洗水对换热片的两面进行冲洗。 [0088], according to the present embodiment, the heat transfer sheet taken in such cases when the heat exchanger is cleaned from the heat exchanger, and the heat transfer sheet immersed in a chemical cleaning liquid (chemical solution), when immersed to after the blockage was completely softened, and then high-pressure washing water to wash both surfaces of the heat transfer sheet. 由于换热片被取出后可被完全浸泡至化学清洗液中,换热片上的全部堵塞物都能与化学清洗液中的药物接触并发生反应,从而可使堵塞物的软化效果更好,再辅以对换热片的两面进行高压水冲洗,即可以更为彻底的将被软化的堵塞物清洗掉,除此之外,采用本实施例的清洗方式,还可以对化学药水进行多次重复利用,降低了清洗费用。 Since the heat transfer sheet can be removed after being completely immersed into a chemical cleaning solution, all the heat exchange fins on the plug can be in contact with a chemical cleaning liquid medicament and reacts, thereby allowing occlusion of better softening effect, then both surfaces of heat transfer sheet combined with the high-pressure water flushing, which can be more thoroughly cleansed softened plug except using the cleaning method of the present embodiment can also be repeated that the chemistries use, reducing the cost of cleaning.

[0089] 需要说明的是,步骤Sll、S12、S13、S14和S15的执行顺序不受本实施例中的次序限制,具体实施时,各步骤执行的先后次序可视实际需求或个人习惯而定。 [0089] Incidentally, the order of performing the steps Sll, S12, S13, S14 and S15 are not limited in the present embodiment the order of embodiment, the specific embodiment, the order of steps performed to actual needs or personal habits may be . 相应地,步骤S21、S22、S23、S24和S25的执行次序同样不受本实施例的限制。 Accordingly, the order of execution of steps S21, S22, S23, S24 and S25 are also not limited by the embodiment.

[0090] 综上,本发明实施例提供的脱硫系统换热器堵塞的治理方法,包括对脱硫系统中的多个预设堵塞治理点进行检查,并判断多个预设堵塞治理点是否在预设治理范围内;若判断结果为至少一个预设堵塞治理点在预设治理范围内,则对在预设治理范围内的预设堵塞治理点进行治理。 [0090] In summary, heat treatment methods desulfurization system provided in an embodiment of the present invention, clogging, desulfurization system comprises a plurality of predetermined control points clogging check, and determines whether a plurality of predetermined points in the pre-plugging governance disposed within the control range; if the judging result of at least one predetermined treatment site within a preset plugging control range, then the predetermined range within a predetermined control points control plugging treatment. 具体实施时,可将换热器的换热片、换热器冷端堵塞源即除雾器、换热器热端堵塞源即除尘器等脱硫系统中可能导致堵塞或增大堵塞程度的设备处设为预设堵塞治理点,并及时对所设堵塞治理点采取相应的堵塞治理措施,例如清除换热片的堵塞物,清除除雾器堵塞物以减小除雾器出口处液滴颗粒物(换热片堵塞物的成分之一)的逃逸量、调整除雾器负荷变化范围内的烟气流速等,在彻底清洗掉换热片堵塞物的基础上,亦从堵塞物源头治理换热器堵塞。 In specific implementation, the heat exchanger may be sheet, the cold end of heat exchanger clogging source demister i.e., the hot end of heat exchanger clogging dust collector source i.e. the desulfurization system and may cause plugging or clogging degree increases at predetermined set points control plugging, blockage and timely control of the set point appropriate congestion control measures taken, for example, clear the blockage of heat exchange fins, clearing clog the demister outlet to reduce the droplet particle demister (one of the heat transfer sheet of the plug component) of the escapement, the defogger and the like to adjust the gas velocity range of load change, on the basis of heat transfer sheet is completely cleaned of the plug, also control the source heat exchanger from blockage clogging. 可见,本发明针对不同堵塞因素采取不同的措施进行综合治理,提高了治理效果,延长了清洗周期、降低了清洗费用,同时提高了脱硫系统投运率及机组运行指标。 Visible, the present invention take different factors for different blockage of comprehensive management measures to improve the treatment effect, extend the cleaning cycle, reduce cleaning costs, while improving the desulfurization system put into operation rate and performance indicators set.

[0091] 实施例二 [0091] Second Embodiment

[0092] 基于实施例一,本发明实施例二公开了一种脱硫系统换热器堵塞的治理系统,如图Ί所示,该脱硫系统换热器堵塞的治理系统包括:检查和判断模块710、治理模块720。 [0092] Based on an embodiment, two embodiments of the present invention discloses a control system for a heat exchanger clogging desulfurization system, as shown in FIG Ί, the clogging of the heat exchanger desulfurization system management system comprising: a determining module 710 checks and , control module 720.

[0093] 检查和判断模块710,用于对脱硫系统中的多个预设堵塞治理点进行检查,并判断所述多个预设堵塞治理点是否在预设治理范围内。 [0093] checking and determining module 710, a plurality of preset plugging desulfurization system control point checks and determines whether or not the plurality of control within a predetermined range preset plugging point control.

[0094] 其中,检查和判断模块710具体包括:第一设备检查模块、第二设备检查模块、除雾器检查模块、除尘器检查模块和换热片检查模块。 [0094] wherein, checking and determining module 710 comprises: a first inspection module device, the second device checking module checking module defogger, dust and heat exchange fins check module checking module.

[0095] 第一设备检查模块,用于检查高压水冲洗设备的行程以及所述高压水冲洗设备中高压水的压力,并判断高压水冲洗设备的行程是否彻底、高压水的压力是否达到第一预设压力点。 [0095] a first device checking module for checking stroke high-pressure water washing equipment and said high-pressure water washing apparatus of high pressure water, high pressure water rinsing and determines whether the operation is complete the device, the high-pressure water reaches a first pre-set pressure point.

[0096] 第二设备检查模块,用于检查压缩空气吹扫设备的行程以及所述压缩空气吹扫设备中压缩空气的压力,并判断压缩空气吹扫设备的行程是否彻底、压缩空气的压力是否达到第二预设压力点。 [0096] The second device checking module for checking the trip device and the air purge apparatus blowing compressed air pressure of compressed air, and compressed air purging device determines whether the operation is complete, if the pressure of compressed air reaches a second preset pressure points.

[0097] 除雾器检查模块,用于检查除雾器堵塞情况及除雾器负荷变化范围内的烟气流速,并判断除雾器是否堵塞、烟气流速是否在除雾器工作范围内。 [0097] defogger checking module for checking the defogger blockage and gas velocity within the range of load change defogger, the defogger and determines not blocked, and the gas velocity operating range defogger.

[0098] 除尘器检查模块,用于检查除尘器,并判断除尘器的效率是否需要提高。 [0098] precipitator checking module for checking the efficiency of dust, dust and determines whether it is necessary to improve.

[0099] 换热片检查模块,用于检查换热片,并判断换热片上堵塞物是否需要清洗。 [0099] heat exchange fins checking module for checking the heat transfer sheet, and heat exchange fins on the plug determines the need for cleaning.

[0100] 治理模块720,用于在判断结果为至少一个预设堵塞治理点在预设治理范围内时,对在预设治理范围内的预设堵塞治理点进行治理。 [0100] Control module 720, the determination result is used in at least one predetermined control point congestion control when a preset range of preset within a predetermined range of control point congestion control management.

[0101] 治理模块720具体包括:第一设备治理模块、第二设备治理模块、除雾器治理模块、除尘器治理模块和换热片治理模块。 [0101] Control module 720 comprises: a first device control module, the second device management module, a defogger control module, control module and the heat exchange fins dust control module.

[0102] 第一设备治理模块,用于在判断结果为高压水冲洗设备的行程不彻底时,调整高压水冲洗设备的行程,使所述高压水冲洗设备的行程彻底;及在判断结果为高压水的压力未达到第一预设压力点时,则加大高压水的压力至第一预设压力点。 [0102] The first device management module, the flushing device for stroke determination result is not complete when the high-pressure water, high pressure water to adjust the stroke flushing device, the high-pressure water washing apparatus thoroughly stroke; and the judgment result is a high pressure when water pressure is less than a first predetermined set point pressure, the increased pressure of the high-pressure water to a first predetermined set point pressure.

[0103] 第二设备治理模块,用于在判断结果为压缩空气吹扫设备的行程不彻底时,调整压缩空气吹扫设备的行程,使所述压缩空气吹扫设备的行程彻底;及在判断结果为压缩空气的压力未达到第二预设压力点,则加大压缩空气的压力至第二预设压力点。 [0103] The second device management module for stroke determination result is not complete air purging apparatus, purge air adjusting device stroke, the stroke of the compressed air purge apparatus thoroughly; and in determining the results for the pressure of compressed air does not reach the second predetermined pressure point, to increase the pressure of the compressed air to a second predetermined set point pressure.

[0104] 除雾器治理模块,用于在判断结果为除雾器堵塞时,清洗除雾器;及在判断结果为除雾器负荷变化范围内烟气流速不在除雾器工作范围内时,调整烟气流速,以使烟气流速在除雾器工作范围内。 [0104] defogger control module, configured to, when the judgment result is blocked demister cleaning demister; and when the result of judgment inner demister gas velocity range not load operating range defogger, adjusting the flow rate of the flue gas, so that the gas velocity in the operating range of the defogger.

[0105] 除尘器治理模块,用于在判断结果为需要提高除尘器的效率时,更换除尘器内部设备或增加电场数量,以提高除尘器的效率。 [0105] Dust control module, configured to, when the judgment result is the need to improve the efficiency of the precipitator, dust replacement device or increase the number of internal electric field to improve the efficiency of the bag.

[0106] 换热片治理模块,用于在判断结果为换热片上堵塞物需要清洗时,对换热片进行彻底清洗。 [0106] Control plate heat exchanger module, configured to, when the determination result is heat exchange fins on the plug needs to be cleaned, on the heat transfer sheet be thoroughly cleaned.

[0107] 对于本发明实施例二公开的脱硫系统换热器堵塞的治理系统而言,由于其与实施例一公开的脱硫系统换热器堵塞的治理方法相对应,所以描述的比较简单,相关相似之处请参见实施例一中脱硫系统换热器堵塞的治理方法部分的说明即可,此处不再详述。 [0107] For the embodiment of the present invention is disclosed in terms of the management system according to the second desulfurization system heat exchanger clogging, because treatment method with a disclosed embodiment of the desulfurization system corresponding to the heat exchanger clogging, the description is relatively simple, the relevant see the description of similar portions embodiment a method of treatment of the desulfurization system of the embodiment to the heat exchanger clogging, not described in detail herein.

[0108] 综上所述,基于单一的冲洗手段无法有效治理换热器堵塞这一情况,本发明全面分析了堵塞原因,查找各种堵塞因素,除了包括传统堵塞治理方法中对换热器的换热片进行清洗外,还从堵塞物源头治理换热器堵塞,同时加强吹扫、冲洗等辅助手段对换热器堵塞进行综合治理,从而较之于现有技术,本发明更为有效地治理了换热器堵塞,保证了脱硫系统高效、稳定、经济的运行。 [0108] In summary, based on a single flushing means can not effectively control heat exchanger blockage of this situation, a comprehensive analysis of the present invention is a blockage reason, look for a variety of blockage factors include, in addition to the traditional congestion management method in the heat exchanger heat cleaning sheet, but also clog the source plugs from heat treatment, while strengthening purging, flushing and other auxiliary means of heat exchanger clogging comprehensive management, so that compared to the prior art, the present invention is more effectively governance of the heat exchanger is clogged, the desulfurization system to ensure efficient, stable and economical operation.

[0109] 以上所述仅是本发明的优选实施方式,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,还可以做出若干改进和润饰,这些改进和润饰也应视为本发明的保护范围。 [0109] The above are only preferred embodiments of the present invention, it should be noted that those of ordinary skill in the art, in the present invention without departing from the principles of the premise, can make various improvements and modifications, such modifications and modifications should also be regarded as the protection scope of the present invention.

Claims (5)

1.一种脱硫系统换热器堵塞的治理方法,其特征在于,包括: 对脱硫系统中的多个预设堵塞治理点进行检查,并判断所述多个预设堵塞治理点是否在预设治理范围内; 若判断结果为至少一个预设堵塞治理点在预设治理范围内,则对在预设治理范围内的预设堵塞治理点进行治理; 其中, 所述多个预设堵塞治理点包括:高压水冲洗设备、压缩空气吹扫设备、除雾器、除尘器以及换热片; 其中, 所述对脱硫系统中的多个预设堵塞治理点进行检查具体包括: 检查高压水冲洗设备的行程以及所述高压水冲洗设备中高压水的压力,判断高压水冲洗设备的行程是否彻底、高压水的压力是否达到第一预设压力点; 检查压缩空气吹扫设备的行程以及所述压缩空气吹扫设备中压缩空气的压力,判断压缩空气吹扫设备的行程是否彻底、压缩空气的压力是否达到第二预设压 Control method for desulfurization system heat exchanger clogging, characterized by comprising: a plurality of preset plugging desulfurization system management point check and determine whether the plurality of predetermined control points are preset plugging the control range; if the judging result of at least one predetermined treatment site within a preset plugging control range, the control of a preset range within a preset plugging point management control; wherein said plurality of predetermined control points plugging comprising: a high-pressure water washing equipment, air purge apparatus, a defogger, dust and heat transfer sheet; wherein the predetermined control points to the plurality of plugging in a desulfurization system checks comprises: checking high-pressure water washing equipment the stroke of the high-pressure and high-pressure water washing apparatus in the water, high-pressure water washing device determines whether the stroke completely, a high-pressure water reaches a first predetermined set point pressure; stroke inspection device and said purge air compression the air pressure of compressed air in the purge apparatus, the compressed air purging device determines whether the stroke completely, the pressure of the compressed air reaches a second predetermined pressure 力点; 检查除雾器堵塞情况及除雾器负荷变化范围内的烟气流速,判断除雾器是否堵塞、烟气流速是否在除雾器工作范围内; 检查除尘器,判断除尘器的效率是否需要提高; 检查换热片,判断换热片上的堵塞物是否需要清洗。 Power point; flue gas velocity within the examination demister blockage and load range of the defogger, the defogger is determined not blocked, and gas velocity in the operating range demister; checking dust, precipitator efficiency is determined whether need to increase; heat transfer sheet to check, it is determined whether the heat exchange fins on the plug needs cleaning.
2.根据权利要求1所述的脱硫系统换热器堵塞的治理方法,其特征在于,所述若判断结果为至少一个预设堵塞治理点在预设治理范围内,则对在预设治理范围内的预设堵塞治理点进行治理具体包括: 若判断结果为高压水冲洗设备的行程不彻底,则调整高压水冲洗设备的行程,使所述高压水冲洗设备的行程彻底;若判断结果为高压水的压力未达到第一预设压力点,则加大高压水的压力至第一预设压力点; 若判断结果为压缩空气吹扫设备的行程不彻底,则调整压缩空气吹扫设备的行程,使所述压缩空气吹扫设备的行程彻底;若判断结果为压缩空气的压力未达到第二预设压力点,则加大压缩空气的压力至第二预设压力点; 若判断结果为除雾器堵塞,则清洗除雾器;若判断结果为除雾器负荷变化范围内烟气流速不在除雾器工作范围内,则调整所述烟气流速, The control method of the heat exchanger clogging desulfurization system as claimed in claim, wherein, if the determination result of at least one predetermined treatment site within a preset plugging control range, the control range of the preset treatment preset plugging point control comprises: determining if the result is high-pressure water washing equipment is not complete stroke, the stroke adjusting device of high pressure water flushing, the high-pressure water washing device complete stroke; if the judging result of the high pressure pressure of the water does not reach a first predetermined set point pressure, the increased pressure of the high-pressure water to a first predetermined set point pressure; air purge if the determination result is not completely trip device, adjusting the stroke of the compressed air purge apparatus , so that the complete stroke of the compressed air purge device; if the judgment result of the compressed air pressure does not reach the second predetermined pressure point, to increase the pressure of the compressed air to a second predetermined set point pressure; if the determination result is inter clogging mist, the mist eliminator clean; if the judging result of the demister load variation range is not within the demister gas velocity operating range, adjusting the flow rate of the flue gas, 以使所述烟气流速在除雾器工作范围内; 若判断结果为需要提高除尘器的效率,则更换除尘器内部设备或增加电场数量,以提高除尘器的效率; 若判断结果为换热片上的堵塞物需要清洗,则对换热片进行彻底清洗。 So that the demister in the flue gas velocity operating range; if the judging result of the need to improve the efficiency of the filter, replace the filter within the device or increase the number of electric field to increase the efficiency of the bag; if the judging result is a heat exchanger plug on the sheet to be cleaned, the heat transfer sheet to be thoroughly cleaned.
3.根据权利要求2所述的脱硫系统换热器堵塞的治理方法,其特征在于,所述对换热片进行彻底清洗具体包括: 将换热片从换热器上取出; 将换热片浸泡在化学清洗液中,浸泡至换热片上的堵塞物完全软化为止; 用高压水对换热片的两面进行冲洗。 The control method of claim 2 desulfurization system as claimed in claim clogging the heat exchanger, characterized in that said thorough cleaning performed on the heat transfer sheet comprises: a sheet removed from the heat exchanger; the heat transfer sheet immersed in a chemical cleaning solution, soak until completely softened heat exchange fins on the plug; flushing both surfaces of the heat transfer sheet with high pressure water.
4.一种脱硫系统换热器堵塞的治理系统,其特征在于,包括:检查和判断模块、治理模块,其中: 所述检查和判断模块,用于对脱硫系统中的多个预设堵塞治理点进行检查,并判断所述多个预设堵塞治理点是否在预设治理范围内; 所述治理模块,用于在判断结果为至少一个预设堵塞治理点在预设治理范围内时,对在预设治理范围内的预设堵塞治理点进行治理; 其中,所述多个预设堵塞治理点包括:高压水冲洗设备、压缩空气吹扫设备、除雾器、除尘器以及换热片; 其中,所述检查和判断模块包括: 第一设备检查模块,用于检查高压水冲洗设备的行程以及所述高压水冲洗设备中高压水的压力,并判断高压水冲洗设备的行程是否彻底、高压水的压力是否达到第一预设压力占.V , 第二设备检查模块,用于检查压缩空气吹扫设备的行程以及所述压缩空气吹扫 A heat exchanger is clogged desulfurization system management system, characterized by comprising: checking and determining module, control module, wherein: said determining and checking means for the desulfurization of a plurality of predetermined blockage management system point check and determine whether the plurality of predetermined control points within a preset plugging range control; the control module for the at least one predetermined determination result is blocked control point within a predetermined control range, for control within a preset range of preset plugging point management control; wherein said plurality of predetermined control points plugging comprising: a high-pressure water washing equipment, air purge apparatus, a defogger, dust and heat transfer sheet; wherein, the checking and determining module comprises: a first device checking module for checking stroke high-pressure water washing equipment and said high-pressure water washing apparatus in high-pressure water pressure and high-pressure water washing device determines whether the stroke completely, a high pressure pressure of the water reaches a first predetermined pressure .V account, the second device checking module for checking the trip device and said purge air blowing compressed air 备中压缩空气的压力,并判断压缩空气吹扫设备的行程是否彻底、压缩空气的压力是否达到第二预设压力点; 除雾器检查模块,用于检查除雾器堵塞情况及除雾器负荷变化范围内的烟气流速,并判断除雾器是否堵塞、烟气流速是否在除雾器工作范围内; 除尘器检查模块,用于检查除尘器,并判断除尘器的效率是否需要提高; 换热片检查模块,用于检查换热片,并判断换热片上的堵塞物是否需要清洗。 Preparation of the pressure of compressed air, and compressed air purging device determines whether the stroke completely, the pressure of the compressed air pressure reaches a second predetermined point; defogger checking module for checking the defogger and blockage demister flue gas velocity within the range of load change, and determines whether the jam defogger, the defogger gas velocity is within the operating range; precipitator checking module for checking the efficiency of the precipitator, and determines whether it is necessary to improve the precipitator; heat transfer sheet checking module for checking the heat transfer sheet, and determines whether the heat exchange fins on the plug needs cleaning.
5.根据权利要求4所述的脱硫系统换热器堵塞的治理系统,其特征在于,所述治理模块包括: 第一设备治理模块,用于在判断结果为高压水冲洗设备的行程不彻底时,调整高压水冲洗设备的行程,使所述高压水冲洗设备的行程彻底;及在判断结果为高压水的压力未达到第一预设压力点时,则加大高压水的压力至第一预设压力点; 第二设备治理模块,用于在判断结果为压缩空气吹扫设备的行程不彻底时,调整压缩空气吹扫设备的行程,使所述压缩空气吹扫设备的行程彻底;及在判断结果为压缩空气的压力未达到第二预设压力点,则加大压缩空气的压力至第二预设压力点; 除雾器治理模块,用于在判断结果为除雾器堵塞时,清洗除雾器;及在判断结果为除雾器负荷变化范围内烟气流速不在除雾器工作范围内时,调整烟气流速,以使烟气流速在除雾器工作 The control system of claim 4 desulfurization system as claimed in claim clogging the heat exchanger, wherein said control module comprises: a first device management module, the device for flushing the stroke determination result is not complete when the high pressure water , high-pressure water washing device to adjust the stroke, the stroke of high-pressure water washing device completely; and when the determination result is high-pressure water does not reach a first predetermined set point pressure, the increased pressure of high pressure water to the first pre- pressure set point; a second device control module, for blowing compressed air in the determination result is not complete stroke device, the stroke adjusting device by blowing compressed air, the compressed air was purged thoroughly trip device; and in the judgment result is the compressed air pressure does not reach a second predetermined set point pressure, then increase the pressure of the compressed air to a second predetermined set point pressure; defogger control module, when the defogger is used in clogging determination result, cleaning demister; and when the result of judgment inner demister gas velocity range not load operating range defogger, adjust the flow rate of flue gas, the flue gas flow in order to work in the defogger 范围内; 除尘器治理模块,用于在判断结果为需要提高除尘器的效率时,更换除尘器内部设备或增加电场数量,以提高除尘器的效率; 换热片治理模块,用于在判断结果为换热片上堵塞物需要清洗时,对换热片进行彻底清洗。 The range; precipitator control module, configured to, when the judgment result is the need to improve the efficiency of the precipitator, dust replacement device or increase the number of internal electric field to improve the efficiency of the bag; heat transfer sheet management module for determining the results when the plug is to be cleaned on the heat exchanger plate, on the heat transfer sheet be thoroughly cleaned.
CN 201310429878 2013-09-18 2013-09-18 Method and system for processing blockage of heat exchanger of desulfurization system CN103432895B (en)

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CN101376081A (en) * 2007-08-31 2009-03-04 北京博奇电力科技有限公司 System and method for flushing spacing plate of bubbling type flue-gas desulfurizing device
CN103170233A (en) * 2013-03-06 2013-06-26 浙江大学 Method for improving reliability and availability of limestone-gypsum flue gas desulfurization system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020092297A1 (en) * 2000-11-01 2002-07-18 Andreas Hertzberg Method for operating an emission control system having nitrogen oxide storage
CN101376081A (en) * 2007-08-31 2009-03-04 北京博奇电力科技有限公司 System and method for flushing spacing plate of bubbling type flue-gas desulfurizing device
CN103170233A (en) * 2013-03-06 2013-06-26 浙江大学 Method for improving reliability and availability of limestone-gypsum flue gas desulfurization system

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