CN109999603A - A kind of device and method reducing wet scrubbing wet flue gas temperature and water content - Google Patents
A kind of device and method reducing wet scrubbing wet flue gas temperature and water content Download PDFInfo
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- CN109999603A CN109999603A CN201910287111.8A CN201910287111A CN109999603A CN 109999603 A CN109999603 A CN 109999603A CN 201910287111 A CN201910287111 A CN 201910287111A CN 109999603 A CN109999603 A CN 109999603A
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 71
- 239000003546 flue gas Substances 0.000 title claims abstract description 71
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 65
- 238000005200 wet scrubbing Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims description 13
- 239000002826 coolant Substances 0.000 claims description 22
- 238000011010 flushing procedure Methods 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 4
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 238000001556 precipitation Methods 0.000 claims 1
- 230000000704 physical effect Effects 0.000 abstract description 2
- 239000000779 smoke Substances 0.000 abstract description 2
- 230000008569 process Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
- B01D45/08—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by impingement against baffle separators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/002—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/02—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating liquids, e.g. brine
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- General Engineering & Computer Science (AREA)
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- General Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Combustion & Propulsion (AREA)
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Abstract
一种降低湿法洗涤湿烟气温度和含水量的设备,介质通路由依次连接的中间水罐、冷水机、管式叶片组和空心折线形叶片组内侧通路组成，中间水罐和冷水机之间设置有循环水泵，冷水机与管式叶片组之间设置有进水联箱，管式叶片组和空心折线形叶片组之间设置有中间联箱，空心折线形叶片组另一侧连接有出水联箱，出水联箱通过循环管路连接中间水罐,构成循环通路；烟气通路由管式叶片组和空心折线形叶片组外侧通路组成。通过管式叶片和空心折线叶片的物理作用汇集分离了烟气中的小液滴，可以降低烟气温度5℃以上，使烟气含水量小于60g/kg(干烟气），含液滴量＜50mg/Nm³，从而解决了湿烟气在排放过程中出现“烟雨、烟羽”问题。
A device for reducing the temperature and water content of wet flue gas from wet scrubbing. The medium passage is composed of an intermediate water tank, a chiller, a tubular blade group and an inner passage of a hollow broken line blade group connected in sequence. The intermediate water tank and the chiller are connected. A circulating water pump is arranged between the two, a water inlet header is arranged between the chiller and the tubular blade group, an intermediate header is arranged between the tubular blade group and the hollow broken line blade group, and the other side of the hollow broken line blade group is connected with a The water outlet header is connected to the intermediate water tank through a circulation pipeline to form a circulation passage; the flue gas passage is composed of a tubular blade group and an outer passage of a hollow broken line blade group. The small droplets in the flue gas are collected and separated by the physical action of the tubular vanes and the hollow broken-line vanes, which can reduce the flue gas temperature by more than 5 °C, so that the water content of the flue gas is less than 60g/kg (dry flue gas), and the droplet content <50mg/Nm³, thus solving the problem of "smoke rain and plume" during the emission of wet flue gas.
Description
技术领域technical field
本发明属于大气环境保护技术领域，涉及烟气处理技术,具体涉及一种降低湿法洗涤湿烟气温度和含水量的设备和方法。The invention belongs to the technical field of atmospheric environmental protection, relates to flue gas treatment technology, and in particular relates to a device and method for reducing the temperature and water content of wet flue gas from wet scrubbing.
背景技术Background technique
目前，我国燃煤类设备，包含电厂锅炉、非发电领域的窑炉、余热锅炉等尾气治理工程已经基本建设完毕，其中采用烟气湿法洗涤治理工艺的占85%以上，技术逐渐成熟。但是，通过对近几年来烟气湿法治理项目的跟踪调查，发现经过长期运行的湿法洗涤工艺普遍存洗涤后湿烟气参数如下：烟气温度50℃左右，烟气含水量87g/kg(干烟气），含液滴量＞75mg/Nm³在排放过程中出现“烟雨、烟羽”现象,对大气环境造成污染。At present, my country's coal-fired equipment, including power plant boilers, kilns in non-power generation fields, waste heat boilers and other exhaust gas treatment projects have been basically completed, of which more than 85% use flue gas wet scrubbing treatment technology, and the technology is gradually mature. However, through the follow-up investigation of the flue gas wet treatment projects in recent years, it is found that the wet flue gas parameters after the long-term operation of the wet scrubbing process are generally as follows: the flue gas temperature is about 50 ℃, and the flue gas moisture content is 87g/kg (Dry flue gas), the droplet content is more than 75mg/Nm³, and the phenomenon of "smoky rain and smoke plume" occurs during the discharge process, causing pollution to the atmospheric environment.
发明内容SUMMARY OF THE INVENTION
本发明针对传统湿烟气在排放过程中出现“烟雨、烟羽”现象提出一种新型的降低湿法洗涤湿烟气温度和含水量的设备和方法。The invention proposes a novel device and method for reducing the temperature and water content of wet scrubbing wet flue gas in view of the phenomenon of "smoky rain and plume" occurring in the traditional wet flue gas in the discharge process.
为了达到上述目的，本发明是采用下述的技术方案实现的：In order to achieve the above object, the present invention adopts the following technical scheme to realize:
一种降低湿法洗涤湿烟气温度和含水量的设备,包括介质通路和烟气通路,A device for reducing the temperature and moisture content of wet scrubbing wet flue gas, including a medium passage and a flue gas passage,
所述介质通路由依次连接的中间水罐、冷水机、管式叶片组和空心折线形叶片组内侧通路组成，其中，所述The medium passage is composed of an intermediate water tank, a chiller, a tubular blade group and an inner passage of a hollow broken-line blade group connected in sequence, wherein the
中间水罐：用于存储循环冷却介质，Intermediate water tank: used to store circulating cooling medium,
冷水机：用于冷却循环冷却介质，Chiller: used to cool the circulating cooling medium,
管式叶片组和空心折线形叶片组：用于提供烟气和循环冷却介质的换热场所，Tubular blade group and hollow broken line blade group: used to provide heat exchange places for flue gas and circulating cooling medium,
所述中间水罐和冷水机之间设置有循环水泵，所述冷水机与管式叶片组之间设置有进水联箱，所述管式叶片组和空心折线形叶片组之间设置有中间联箱，所述空心折线形叶片组另一侧连接有出水联箱，所述出水联箱通过循环管路连接中间水罐,构成循环通路；A circulating water pump is arranged between the intermediate water tank and the chiller, a water inlet header is arranged between the chiller and the tubular blade group, and a middle is arranged between the tubular blade group and the hollow broken line blade group. a header, the other side of the hollow broken-line blade group is connected with a water outlet header, and the water outlet header is connected to an intermediate water tank through a circulation pipeline to form a circulation passage;
所述烟气通路由管式叶片组和空心折线形叶片组外侧通路组成。The flue gas passage is composed of a tubular blade group and an outer passage of the hollow broken-line blade group.
作为优选, 所述管式叶片组采用平行错列分布，管式叶片组设置在空心折线形叶片组上游，所述空心折线形叶片组采用平行顺列分布，空心折线形叶片组的叶片有三处以上的弯转点。Preferably, the tubular blade group is distributed in parallel and staggered, the tubular blade group is arranged upstream of the hollow broken-line blade group, the hollow broken-line blade group is distributed in parallel, and the hollow broken-line blade group has three blades. above the turning point.
作为优选, 所述管式叶片组和空心折线形叶片组设置有冲洗管路和雾化喷嘴。Preferably, the tubular blade group and the hollow broken-line blade group are provided with flushing pipelines and atomizing nozzles.
作为优选,所述介质通路与烟气通路换热方式为错流换热。Preferably, the heat exchange between the medium passage and the flue gas passage is cross-flow heat exchange.
作为优选,存储在中间水罐中的循环冷却介质经冷水机冷却后依次进入管式叶片组和空心折线形叶片组内侧，同时湿烟气流经管式叶片组和空心折线形叶片组外部，使得低温循环冷却介质与湿烟气实现间接换热，湿烟气温度和含湿量降低，析出部分水蒸气；湿烟气在惯性力作用下碰撞、团聚、成膜，实现烟气的气液分离。Preferably, the circulating cooling medium stored in the intermediate water tank is cooled by the chiller and then enters the inner side of the tubular blade group and the hollow broken-line blade group in turn, while the wet flue gas flows through the outside of the tubular blade group and the hollow broken-line blade group, so that The low temperature circulating cooling medium and the wet flue gas realize indirect heat exchange, the temperature and moisture content of the wet flue gas are reduced, and part of the water vapor is precipitated; the wet flue gas collides, agglomerates, and forms a film under the action of inertial force to realize the gas-liquid separation of the flue gas .
作为优选,中间水罐中的循环冷却介质温度<15℃。As a preference, the temperature of the circulating cooling medium in the intermediate water tank is <15°C.
作为优选,所述循环冷却介质为软化水或除盐水。Preferably, the circulating cooling medium is demineralized water or demineralized water.
与现有技术相比，本发明的优点和积极效果在于：Compared with the prior art, the advantages and positive effects of the present invention are:
本发明通过冷却降低解决湿烟气温度，减小了烟气相对含湿量。通过管式叶片和空心折线叶片的物理作用汇集分离了烟气中的小液滴，可以降低烟气温度5℃以上，使烟气含水量小于60g/kg(干烟气），含液滴量＜50mg/Nm³，从而解决了湿烟气在排放过程中出现“烟雨、烟羽”问题。The invention reduces the temperature of wet flue gas by cooling and reduces the relative humidity content of flue gas. The small droplets in the flue gas are collected and separated by the physical action of the tubular vanes and the hollow broken-line vanes, which can reduce the flue gas temperature by more than 5 °C, so that the water content of the flue gas is less than 60g/kg (dry flue gas), and the droplet content <50mg/Nm³, thus solving the problem of "smoky rain and plume" during the emission of wet flue gas.
附图说明Description of drawings
图1为本发明设备流程结构示意图。FIG. 1 is a schematic diagram of the flow structure of the equipment of the present invention.
各附图标记为：1.中间水箱 2.循环水泵 3.冷水机 4.进口联箱 5.管式叶片 6.中间联箱 7.空心折线形叶片 8.出口联箱 9.冲洗管路 10喷嘴11管路阀门组件。The reference numerals are: 1. Intermediate water tank 2. Circulating water pump 3. Chiller 4. Inlet header 5. Tubular vane 6. Intermediate header 7. Hollow broken line vane 8. Outlet header 9. Flushing pipeline 10 Nozzle 11 Line valve assembly.
具体实施方式Detailed ways
为了能够更清楚地理解本发明的上述目的、特征和优点，下面结合具体实施例对本发明做进一步说明。需要说明的是，在不冲突的情况下，本申请的实施例及实施例中的特征可以相互组合。In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be further described below with reference to specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments may be combined with each other in the case of no conflict.
在下面的描述中阐述了很多具体细节以便于充分理解本发明，但是，本发明还可以采用不同于在此描述的其他方式来实施，因此，本发明并不限于下面公开说明书的具体实施例的限制。Many specific details are set forth in the following description to facilitate a full understanding of the present invention, however, the present invention may also be implemented in other ways than those described herein, and therefore, the present invention is not limited to the specific embodiments disclosed in the following description. limit.
实施例1，如图1所示，本实施例提供降低湿法洗涤湿烟气温度和含水量的设备及方法详细步骤。Embodiment 1, as shown in FIG. 1 , this embodiment provides detailed steps of an apparatus and method for reducing the temperature and water content of wet flue gas from wet scrubbing.
降低湿法洗涤湿烟气温度和含水量的设备，包括中间水罐1、循环水泵2、冷水机3、进水联箱4、管式叶片组5、中间联箱6、空心折线形叶片7、出水联箱8、冲洗管路9和喷嘴10以及管路阀门组件11等部件。水侧流程：冷却介质依次顺序经过中间水罐1、循环水泵2、冷水机4、进水联箱5、管式叶片6、中间联箱7、空心折线形叶片7、出水联箱8再回到中间水罐1。烟气侧流程：湿烟气垂直通过先通过管式叶片组5，再通过空心折线形叶片组7，烟气与低温冷却介质间接换热，换热器依据烟气流动方向，可以采用水平流或垂直流布置。配置叶片表面冲洗系统，防止换热面组件表面结垢。Equipment for reducing the temperature and water content of wet flue gas in wet scrubbing, including intermediate water tank 1, circulating water pump 2, chiller 3, water inlet header 4, tubular blade group 5, intermediate header 6, hollow broken-line blade 7 , outlet header 8 , flushing pipeline 9 and nozzle 10 and pipeline valve assembly 11 and other components. Water-side process: the cooling medium passes through the intermediate water tank 1, the circulating water pump 2, the chiller 4, the water inlet header 5, the tubular blade 6, the middle header 7, the hollow broken line blade 7, and the water outlet header 8 in sequence and then returns to intermediate water tank 1. Flue gas side process: the wet flue gas passes vertically through the tubular blade group 5, and then passes through the hollow broken line blade group 7, and the flue gas exchanges heat indirectly with the low-temperature cooling medium. The heat exchanger can adopt horizontal flow according to the flow direction of the flue gas. or vertical flow arrangement. Equipped with a blade surface flushing system to prevent scaling on the surface of the heat exchange surface components.
中间水罐1用于存储循环冷却介质；冷却介质采用闭式循环；冷水机3用于冷却系统中的循环介质，制造低温水；冷却介质走换热组件叶片内部，湿烟气走换热组件叶片外部，用冷却的低温介质与湿烟气通过换热组间接换热，湿烟气温度降低，含湿量降低，析出部分水蒸气；湿烟气通过平行排列的多弯转叶片组，在惯性力作用下，通过碰撞、团聚、成膜，最终实现烟气的气液分离；设置冲洗管路和雾化喷嘴，可对叶片表面进行雾化冲洗，防止叶片表面结垢。The intermediate water tank 1 is used to store the circulating cooling medium; the cooling medium adopts closed circulation; the chiller 3 is used to cool the circulating medium in the system to produce low-temperature water; Outside the blade, the cooled low-temperature medium is used to indirectly exchange heat with the wet flue gas through the heat exchange group, the temperature of the wet flue gas decreases, the moisture content decreases, and part of the water vapor is precipitated; the wet flue gas passes through the parallel arrangement of the multi-turning blade group, Under the action of inertial force, the gas-liquid separation of flue gas is finally realized through collision, agglomeration and film formation; the setting of flushing pipeline and atomizing nozzle can atomize and flush the blade surface to prevent scaling on the blade surface.
其中，冷却介质通过冷水机3冷却；叶片采用管式叶片5和空心折线形叶片7；由进水联箱4、管式叶片5、中间联箱6、空心折线形叶片7和出水联箱8构成换热组；由平行错列管片和平行排列的空心折线形叶片构成多弯转通道，叶片有三处以上的弯转点；叶片设置冲洗管路。在管式叶片下侧设置向上冲洗的冲洗管路，管路上安装雾化喷嘴10，折线叶片的下侧设置同时向上向下的冲洗管路，管路上安装雾化喷嘴，冲洗水采用普通水源，入口压力0.2-0.3MPa。Among them, the cooling medium is cooled by the chiller 3; the blades are tubular blades 5 and hollow broken-line blades 7; A heat exchange group is formed; a multi-turn channel is formed by parallel staggered segments and hollow broken-line blades arranged in parallel, and the blades have more than three turning points; the blades are provided with flushing pipelines. A flushing pipeline for upward flushing is arranged on the lower side of the tubular blade, and an atomizing nozzle 10 is installed on the pipeline. The lower side of the folded blade is provided with a flushing pipeline that is simultaneously upward and downward, and an atomizing nozzle is installed on the pipeline. Inlet pressure 0.2-0.3MPa.
降低湿法洗涤湿烟气温度和含水量的方法，包括如下步骤：存储在中间水罐1中的循环冷却介质经冷水机3冷却后依次进入管式叶片组5和空心折线形叶片组7内侧，同时湿烟气流经管式叶片组5和空心折线形叶片组7外部，使得低温循环冷却介质与湿烟气实现间接换热，湿烟气温度和含湿量降低，析出部分水蒸气；湿烟气在惯性力作用下碰撞、团聚、成膜，实现烟气的气液分离。其中，中间水罐1中的循环冷却介质温度<15℃。The method for reducing the temperature and water content of wet flue gas from wet scrubbing includes the following steps: the circulating cooling medium stored in the intermediate water tank 1 is cooled by the chiller 3 and then enters the tubular blade group 5 and the inner side of the hollow broken line blade group 7 in turn. At the same time, the wet flue gas flows through the outside of the tubular blade group 5 and the hollow broken-line blade group 7, so that the low-temperature circulating cooling medium and the wet flue gas achieve indirect heat exchange, the temperature and moisture content of the wet flue gas are reduced, and part of the water vapor is precipitated; The flue gas collides, agglomerates and forms a film under the action of inertial force to realize the gas-liquid separation of the flue gas. Wherein, the temperature of the circulating cooling medium in the intermediate water tank 1 is less than 15°C.
烟气气液分离处理之后，烟气温度由50℃将至44.3℃，使烟气含水量减少22g/kg(干烟气），含液滴量＜50mg/Nm³。After the flue gas gas-liquid separation treatment, the flue gas temperature will be reduced from 50 ℃ to 44.3 ℃, so that the water content of the flue gas is reduced by 22g/kg (dry flue gas), and the droplet content is less than 50mg/Nm³.
以上所述，仅是本发明的较佳实施例而已，并非是对本发明作其它形式的限制，任何熟悉本专业的技术人员可能利用上述揭示的技术内容加以变更或改型为等同变化的等效实施例应用于其它领域，但是凡是未脱离本发明技术方案内容，依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与改型，仍属于本发明技术方案的保护范围。The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in other forms. Any person skilled in the art may use the technical content disclosed above to make changes or modifications to equivalent changes. The embodiments are applied to other fields, but any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still belong to the protection scope of the technical solutions of the present invention without departing from the content of the technical solutions of the present invention.
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