CN204147740U - The ultra-clean exhaust system of a kind of coal steam-electric plant smoke ultralow temperature - Google Patents
The ultra-clean exhaust system of a kind of coal steam-electric plant smoke ultralow temperature Download PDFInfo
- Publication number
- CN204147740U CN204147740U CN201420525877.8U CN201420525877U CN204147740U CN 204147740 U CN204147740 U CN 204147740U CN 201420525877 U CN201420525877 U CN 201420525877U CN 204147740 U CN204147740 U CN 204147740U
- Authority
- CN
- China
- Prior art keywords
- flue gas
- outlet
- heat exchange
- ultra
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Treating Waste Gases (AREA)
Abstract
一种火电厂烟气超低温超净排放系统，包括一换热洗涤塔，其下部设置有烟气入口，顶部设置有烟气出口；换热洗涤塔内中上部设置有多层喷嘴，喷嘴入口与循环水泵出口相连，在多层喷嘴的上方布置有多层除雾器，除雾器上设有与冲洗水泵出口相连的冲洗水喷嘴，换热洗涤塔底部设置有与循环冷却水处理系统入口相连的放水口，循环冷却水处理系统出口与换热系统循环冷却水进口相连，换热系统的循环冷却水出口与储水箱入口相连，储水箱出水口与循环水泵和冲洗水泵的入口相连；本实用新型系统简单，操作方便，能有效缓解湿法脱硫后烟囱冒白烟的现象，实现火电厂烟气的超净排放，同时能回收烟气中的水分和烟气中的低品位热量，具有良好的环保性和经济性。
A thermal power plant flue gas ultra-low temperature ultra-clean emission system, including a heat exchange scrubber, the lower part of which is provided with a flue gas inlet, and the top is provided with a flue gas outlet; the middle and upper part of the heat exchange scrubber is provided with multi-layer nozzles, the nozzle inlet and The outlet of the circulating water pump is connected, and a multi-layer demister is arranged above the multi-layer nozzle. The demister is equipped with a flushing water nozzle connected to the outlet of the flushing water pump. The outlet of the circulating cooling water treatment system is connected to the inlet of the circulating cooling water of the heat exchange system, the outlet of the circulating cooling water of the heat exchange system is connected to the inlet of the water storage tank, and the outlet of the water storage tank is connected to the inlet of the circulating water pump and the flushing water pump; The new system is simple and easy to operate. It can effectively alleviate the phenomenon of white smoke from the chimney after wet desulfurization, realize the ultra-clean emission of flue gas in thermal power plants, and at the same time recover the moisture in the flue gas and the low-grade heat in the flue gas. It has good performance environmental protection and economy.
Description
技术领域technical field
本实用新型涉及火电厂烟气排放技术领域，具体涉及一种火电厂烟气超低温超净排放系统。The utility model relates to the technical field of flue gas emission in thermal power plants, in particular to an ultra-low temperature and ultra-clean emission system for flue gas in thermal power plants.
背景技术Background technique
随着国家环保要求的日益严格，火力发电机组的环保指标要求向超净排放的标准发展。目前常规燃煤发电机组对于污染物的控制主要采用SCR/SNCR+FGD+布袋除尘器+低氮燃烧技术，上述污染物控制技术，能实现燃煤发电机组污染物排放满足最新的环保排放要求，但仍然不能达到超净排放的要求，采用烟气超低温超净排放技术，FGD出口的烟气在换热洗涤塔内与雾化喷淋水直接接触，烟气与雾化喷淋水逆流接触的过程中，发生强烈的传热传质过程，烟气中的主要污染物(NOX/SO2/粉尘/Hg等)会被雾化喷淋水捕捉，从而进一步降低烟气中污染物的浓度，实现超净排放。With the increasingly stringent national environmental protection requirements, the environmental protection indicators of thermal power generating units are required to develop towards ultra-clean emission standards. At present, conventional coal-fired power generation units mainly use SCR/SNCR+FGD+bag filter+low-nitrogen combustion technology to control pollutants. The above-mentioned pollutant control technology can realize the pollutant emission of coal-fired power generation units to meet the latest environmental protection emission requirements, but Still can not meet the requirements of ultra-clean emission, using ultra-low temperature ultra-clean emission technology of flue gas, the flue gas at the outlet of FGD is in direct contact with atomized spray water in the heat exchange scrubber, and the process of countercurrent contact between flue gas and atomized spray water In the process, a strong heat and mass transfer process occurs, and the main pollutants in the flue gas (NOX/SO 2 /dust/Hg, etc.) will be captured by the atomized spray water, thereby further reducing the concentration of pollutants in the flue gas and realizing Ultra clean emissions.
石灰石-石膏湿法烟气脱硫技术以其对机组负荷的适应性强、脱硫效率高等优点在火电厂烟气脱硫系统中得到广泛应用。目前，湿法脱硫吸收塔出口烟气的温度一般控制在50℃左右，烟气中的水蒸气处于饱和状态，烟气的含湿量还处于较高的水平。烟气排入大气后，由于大气温度要远低于烟气温度(特别是北方地区的冬天)，烟气中的水蒸气急剧冷却后，以极细颗粒的水滴存在于烟气中，产生大量的水雾，烟囱冒白烟的现象十分严重，同时还会造成石膏雨的二次污染。采用烟气超低温超净排放技术，尽可能的降低排烟温度，从而降低烟气的饱和含水量，回收烟气中的水分，降低湿法脱硫水耗，缓解烟囱冒白烟现象，防止石膏雨的生成。Limestone-gypsum wet flue gas desulfurization technology has been widely used in the flue gas desulfurization system of thermal power plants due to its strong adaptability to unit load and high desulfurization efficiency. At present, the temperature of the flue gas at the outlet of the wet desulfurization absorption tower is generally controlled at about 50°C, the water vapor in the flue gas is in a saturated state, and the moisture content of the flue gas is still at a relatively high level. After the flue gas is discharged into the atmosphere, since the atmospheric temperature is much lower than the flue gas temperature (especially in winter in the northern region), the water vapor in the flue gas cools down sharply, and exists in the flue gas as very fine particles of water droplets, generating a large amount of The phenomenon of white smoke from the chimney is very serious, and it will also cause secondary pollution from gypsum rain. Ultra-low temperature and ultra-clean flue gas emission technology is adopted to reduce the exhaust gas temperature as much as possible, thereby reducing the saturated water content of the flue gas, recovering the moisture in the flue gas, reducing the water consumption of wet desulfurization, alleviating the phenomenon of white smoke from the chimney, and preventing gypsum rain generation.
随着烟气温度的降低，烟气中的饱和水会冷凝，释放出大量的显热和气化潜热，在需要集中供暖的北方地区，可以通过热泵技术大量回收这部分低品位热量作为市政供暖的热源等，具有较高的经济效益。As the temperature of the flue gas decreases, the saturated water in the flue gas will condense, releasing a large amount of sensible heat and latent heat of vaporization. In northern areas where central heating is required, a large amount of this low-grade heat can be recovered by heat pump technology as municipal heating. Heat sources, etc., have high economic benefits.
当这部分热量无法利用时，可以采用冷却塔对循环冷却水进行冷却，保证循环冷却水的回水温度满足设计要求，保证系统的连续稳定运行。When this part of heat cannot be utilized, cooling towers can be used to cool the circulating cooling water to ensure that the return water temperature of the circulating cooling water meets the design requirements and ensure the continuous and stable operation of the system.
总之，采用火电厂烟气超低温超净排放技术可以大幅降低湿法脱硫的水耗、降低烟气中污染物排放，达到超净排放的要求，同时能回收烟气中的显热和气化潜热，提高燃料的利用率，具有良好的环保性和经济性。对燃煤发电机组满足新型环保要求有着十分重要的意义。In short, the use of ultra-low temperature and ultra-clean emission technology for flue gas in thermal power plants can greatly reduce the water consumption of wet desulfurization, reduce the emission of pollutants in the flue gas, meet the requirements of ultra-clean emission, and recover the sensible heat and latent heat of gasification in the flue gas. Improve the utilization rate of fuel, with good environmental protection and economy. It is of great significance for coal-fired generating units to meet new environmental protection requirements.
发明内容Contents of the invention
为了克服上述现有技术存在的问题，本实用新型的目的在于提供一种火电厂烟气超低温超净排放系统，本实用新型系统简单，操作方便，能有效缓解湿法脱硫后烟囱冒白烟的现象，降低烟气中的污染物排放，实现火电厂烟气的超净排放，同时能回收烟气中的水分和烟气中的低品位热量，具有良好的环保性和经济性。In order to overcome the above-mentioned problems in the prior art, the purpose of this utility model is to provide an ultra-low temperature and ultra-clean exhaust system for flue gas in a thermal power plant. Phenomenon, reduce the emission of pollutants in the flue gas, realize the ultra-clean emission of flue gas in thermal power plants, and at the same time recover the moisture in the flue gas and the low-grade heat in the flue gas, which has good environmental protection and economy.
为了实现上述目的，本实用新型采用以下技术方案：In order to achieve the above object, the utility model adopts the following technical solutions:
一种火电厂烟气超低温超净排放系统，包括一换热洗涤塔1，所述换热洗涤塔1的下部设置有烟气入口，与火电厂湿法脱硫塔出口烟道相连接，顶部设置有烟气出口与引风机7的入口相连接；所述换热洗涤塔1内中上部设置有多层喷嘴，喷嘴的入口与循环水泵5的出口相连接，在多层喷嘴的上方布置有多层除雾器，除雾器上设有冲洗水喷嘴，冲洗水喷嘴的入口与冲洗水泵6的出口相连接；所述换热洗涤塔1的底部设置有放水口，放水口与循环冷却水处理系统2的入口相连接；所述换热洗涤塔1的底部还设置有临时排污口；所述循环冷却水处理系统2的出口与换热系统3的循环冷却水进口相连接，所述换热系统3的循环冷却水出口与储水箱4的入口相连接，所述储水箱4的出水口与循环水泵5和冲洗水泵6的入口相连接，储水箱4的下部设有临时排污口。A thermal power plant flue gas ultra-low temperature ultra-clean discharge system, including a heat exchange scrubber 1, the lower part of the heat exchange scrubber 1 is provided with a flue gas inlet, connected with the outlet flue of the thermal power plant wet desulfurization tower, and the top is provided with A flue gas outlet is connected to the inlet of the induced draft fan 7; the middle and upper part of the heat exchange washing tower 1 is provided with multi-layer nozzles, and the inlet of the nozzles is connected to the outlet of the circulating water pump 5, and multiple nozzles are arranged above the multi-layer nozzles. Layer demister, the demister is provided with a flushing water nozzle, the inlet of the flushing water nozzle is connected to the outlet of the flushing water pump 6; the bottom of the heat exchange washing tower 1 is provided with a water outlet, and the water outlet is treated with the circulating cooling water The inlet of the system 2 is connected; the bottom of the heat exchange washing tower 1 is also provided with a temporary sewage outlet; the outlet of the circulating cooling water treatment system 2 is connected with the circulating cooling water inlet of the heat exchange system 3, and the heat exchange The circulating cooling water outlet of the system 3 is connected to the inlet of the water storage tank 4, the water outlet of the water storage tank 4 is connected to the inlets of the circulating water pump 5 and the flushing water pump 6, and the lower part of the water storage tank 4 is provided with a temporary sewage outlet.
所述换热洗涤塔1内布置1-5层循环冷却水的喷嘴。1-5 layers of circulating cooling water nozzles are arranged in the heat exchange washing tower 1 .
所述换热洗涤塔1内布置2-3层除雾器。2-3 layers of mist eliminators are arranged in the heat exchange washing tower 1 .
所述换热系统3为吸收式热泵，所述吸收式热泵的驱动热源来自火电厂汽轮机的低压缸抽气，热网回水作为吸收式热泵高温热源的工质。The heat exchange system 3 is an absorption heat pump. The driving heat source of the absorption heat pump comes from the low-pressure cylinder extraction of the steam turbine in the thermal power plant, and the return water from the heat network is used as the working medium of the high-temperature heat source of the absorption heat pump.
所述换热系统3为冷却塔。The heat exchange system 3 is a cooling tower.
和现有技术相比较，本实用新型具有如下优点：Compared with the prior art, the utility model has the following advantages:
1、本实用新型实现火电厂烟气的超净排放，有效缓解火电机组采用湿法脱硫后烟囱冒白烟的现象，防止石膏雨的产生。回收烟气中的水分，减少湿法脱硫水耗，同时通过余热回收利用技术，提高燃料的利用效率，减少能源浪费。1. The utility model realizes the ultra-clean discharge of flue gas from thermal power plants, effectively alleviates the phenomenon of white smoke from the chimney after the thermal power unit adopts wet desulfurization, and prevents the generation of gypsum rain. Recover the moisture in the flue gas, reduce the water consumption of wet desulfurization, and improve the utilization efficiency of fuel and reduce energy waste through waste heat recovery and utilization technology.
2、本实用新型方法与常规污染物控制技术相结合，可以控制火电厂烟气中NOX≤50mg/Nm3,SO2≤35mg/Nm3，粉尘≤10mg/Nm3。2. Combining the method of the utility model with conventional pollutant control technology, it can control NOx ≤ 50mg/Nm 3 , SO 2 ≤ 35mg/Nm 3 , and dust ≤ 10mg/Nm 3 in the flue gas of thermal power plants.
3、本实用新型可以控制火电厂烟气排烟温度≤40℃，降低湿法脱硫水耗50％以上。3. The utility model can control the flue gas exhaust temperature of the thermal power plant to ≤40°C, and reduce the water consumption of wet desulfurization by more than 50%.
附图说明Description of drawings
图1为本实用新型火电厂烟气超低温超净排放方法流程图。Fig. 1 is a flow chart of the ultra-low temperature and ultra-clean emission method for flue gas in a thermal power plant of the present invention.
图2为本实用新型实施例1火电厂烟气超低温超净排放方法流程图(带余热回收利用)。Fig. 2 is a flowchart of a method for ultra-low temperature and ultra-clean emission of flue gas from a thermal power plant in Embodiment 1 of the utility model (with waste heat recovery and utilization).
图3为本实用新型实施例2火电厂烟气超低温超净排放方法流程图(不带余热回收利用)Fig. 3 is a flow chart of the method for ultra-low temperature and ultra-clean emission of flue gas from a thermal power plant in Example 2 of the utility model (without waste heat recovery and utilization)
具体实施方式Detailed ways
下面结合附图和具体实施方式对本实用新型作更详细的说明。Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in more detail.
如图1所示，本实用新型一种火电厂烟气超低温超净排放系统，包括一换热洗涤塔1，所述换热洗涤塔1的下部设置有烟气入口，与火电厂湿法脱硫塔出口烟道相连接，顶部设置有烟气出口与引风机7的入口相连接；所述换热洗涤塔1内中上部设置有多层喷嘴，喷嘴的入口与循环水泵5的出口相连接，在多层喷嘴的上方布置有多层除雾器，除雾器上设有冲洗水喷嘴，冲洗水喷嘴的入口与冲洗水泵6的出口相连接；所述换热洗涤塔1的底部设置有放水口，放水口与循环冷却水处理系统2的入口相连接；所述换热洗涤塔1的底部还设置有临时排污口；所述循环冷却水处理系统2的出口与换热系统3的循环冷却水进口相连接，所述换热系统3的循环冷却水出口与储水箱4的入口相连接，所述储水箱4的出水口与循环水泵5和冲洗水泵6的入口相连接，储水箱4的下部设有临时排污口。As shown in Figure 1, the utility model is a thermal power plant flue gas ultra-low temperature ultra-clean discharge system, including a heat exchange washing tower 1, the lower part of the heat exchange washing tower 1 is provided with a flue gas inlet, and the thermal power plant wet desulfurization The tower outlet flue is connected, and the top is provided with a flue gas outlet connected to the inlet of the induced draft fan 7; the middle and upper part of the heat exchange washing tower 1 is provided with multi-layer nozzles, and the inlet of the nozzle is connected to the outlet of the circulating water pump 5, A multi-layer demister is arranged above the multi-layer nozzle, and the demister is provided with a flushing water nozzle, and the inlet of the flushing water nozzle is connected with the outlet of the flushing water pump 6; The water port and the water discharge port are connected with the inlet of the circulating cooling water treatment system 2; the bottom of the heat exchange washing tower 1 is also provided with a temporary sewage outlet; The water inlet is connected, the circulating cooling water outlet of the heat exchange system 3 is connected with the inlet of the water storage tank 4, the water outlet of the water storage tank 4 is connected with the inlet of the circulating water pump 5 and the flushing water pump 6, and the outlet of the water storage tank 4 The lower part has a temporary sewage outlet.
作为本实用新型的优选实施方式，所述换热洗涤塔1内布置1-5层循环冷却水的喷嘴。As a preferred embodiment of the present utility model, 1-5 layers of circulating cooling water nozzles are arranged in the heat exchange washing tower 1 .
作为本实用新型的优选实施方式，所述换热洗涤塔1内布置2-3层除雾器。As a preferred embodiment of the present utility model, 2-3 layers of mist eliminators are arranged in the heat exchange washing tower 1 .
如图1所示，本实用新型火电厂烟气超低温超净排放系统的排放方法，来自火电厂湿法脱硫塔出口的湿烟气由换热洗涤塔1的烟气入口进入，在换热洗涤塔1内由下向上行走，循环冷却水经由多层喷嘴雾化后由上向下行走，烟气与雾化的循环冷却水在换热洗涤塔1内逆流接触，发生强烈的传热传质过程，烟气被循环冷却水冷却，烟气中的水蒸气冷凝后产生大量凝结水进入循环冷却水中，烟气的显热和水蒸气的气化潜热被循环冷却水吸收，降温后的烟气继续上行，通过布置在换热洗涤塔1上部的除雾器，烟气中的大部分液滴被除雾器除去，同时烟气中的部分污染物(SO2/NOx/Hg/粉尘等)进入循环冷却水；降温后的烟气最终由换热洗涤塔1的烟气出口排出，经由引风机7进入烟囱排放至大气；循环冷却水吸热后由换热洗涤塔1底部的放水口放入循环冷却水处理系统2，循环冷却水在其中经过沉淀、过滤及加药中和一系列处理后，由换热系统3的循环冷却水入口进入换热系统3冷却后由换热系统3的循环冷却水出口排入储水箱4，储水箱中的循环冷却水经由循环水泵5和冲洗水泵6送入换热洗涤塔1循环利用。As shown in Figure 1, in the discharge method of the ultra-low temperature and ultra-clean exhaust system for flue gas in a thermal power plant of the present invention, the wet flue gas from the outlet of the wet desulfurization tower of the thermal power plant enters through the flue gas inlet of the heat exchange washing tower 1, and is washed in the heat exchange The tower 1 runs from bottom to top, and the circulating cooling water travels from top to bottom after being atomized by multi-layer nozzles. The flue gas and the atomized circulating cooling water contact countercurrently in the heat exchange washing tower 1, resulting in strong heat and mass transfer. During the process, the flue gas is cooled by the circulating cooling water. After the water vapor in the flue gas condenses, a large amount of condensed water enters the circulating cooling water. The sensible heat of the flue gas and the latent heat of vaporization of the water vapor are absorbed by the circulating cooling water. The cooled flue gas Continue upward, through the demister arranged on the upper part of the heat exchange scrubber 1, most of the liquid droplets in the flue gas are removed by the demister, and part of the pollutants in the flue gas (SO 2 /NOx/Hg/dust, etc.) Enter the circulating cooling water; the flue gas after cooling is finally discharged from the flue gas outlet of the heat exchange scrubber 1, enters the chimney through the induced draft fan 7, and is discharged to the atmosphere; The circulating cooling water enters the circulating cooling water treatment system 2, where the circulating cooling water undergoes a series of treatments of precipitation, filtration and dosing neutralization, and enters the heat exchange system 3 from the circulating cooling water inlet of the heat exchange system 3, and then is cooled by the heat exchange system 3. The circulating cooling water outlet is discharged into the water storage tank 4, and the circulating cooling water in the water storage tank is sent to the heat exchange washing tower 1 for recycling through the circulating water pump 5 and the flushing water pump 6.
实施例1：Example 1:
如图2所示，本实施例换热系统3为吸收式热泵，吸收式热泵的驱动热源来自火电厂汽轮机的低压缸抽气，热网回水作为吸收式热泵高温热源的工质。其排放方法为：来自火电厂湿法脱硫塔出口的湿烟气由换热洗涤塔1的烟气入口进入，在换热洗涤塔1内由下向上行走，循环冷却水经由多层喷嘴雾化后由上向下行走，烟气与雾化的循环冷却水在换热洗涤塔1内逆流接触，发生强烈的传热传质过程，烟气被循环冷却水冷却，烟气中的水蒸气冷凝后产生大量凝结水进入循环冷却水中，烟气的显热和水蒸气的气化潜热被循环冷却水吸收，降温后的烟气继续上行，通过布置在换热洗涤塔1上部的除雾器，烟气中的大部分液滴被除雾器除去，同时烟气中的部分污染物(SO2/NOx/Hg/粉尘等)进入循环冷却水；降温后的烟气最终由换热洗涤塔1的烟气出口排出，经由引风机7进入烟囱排放至大气；循环冷却水吸热后由换热洗涤塔1底部的放水口放入循环冷却水处理系统2，循环冷却水经过沉淀、过滤及加药中和等一系列处理后，作为吸收式热泵的低温热源，循环冷却水经过过吸收式热泵吸热降温后，排入储水箱4。吸收式热泵的驱动热源来自火电厂汽轮机的低压缸抽气，热网回水作为高温热源的工质进入吸收式热泵，吸热后由吸收式热泵的高温热源工质出口进入热网。储水箱4中的循环冷却水经由循环水泵5和冲洗水泵6送入换热洗涤塔1循环利用。As shown in Figure 2, the heat exchange system 3 of this embodiment is an absorption heat pump. The driving heat source of the absorption heat pump comes from the low-pressure cylinder extraction of the steam turbine of the thermal power plant, and the return water of the heat network is used as the working medium of the high-temperature heat source of the absorption heat pump. The discharge method is as follows: the wet flue gas from the outlet of the wet desulfurization tower of the thermal power plant enters through the flue gas inlet of the heat exchange scrubber 1, walks from bottom to top in the heat exchange scrubber 1, and the circulating cooling water is atomized through multi-layer nozzles After walking from top to bottom, the flue gas and the atomized circulating cooling water contact countercurrently in the heat exchange scrubber 1, and a strong heat and mass transfer process occurs, the flue gas is cooled by the circulating cooling water, and the water vapor in the flue gas condenses Afterwards, a large amount of condensed water enters the circulating cooling water, the sensible heat of the flue gas and the latent heat of vaporization of the water vapor are absorbed by the circulating cooling water, and the cooled flue gas continues upward, passing through the demister arranged on the upper part of the heat exchange washing tower 1, Most of the liquid droplets in the flue gas are removed by the demister, and at the same time, some pollutants in the flue gas (SO 2 /NOx/Hg/dust, etc.) enter the circulating cooling water; the flue gas after cooling is finally sent to the heat exchange scrubber 1 The flue gas is discharged from the outlet, enters the chimney through the induced draft fan 7, and is discharged to the atmosphere; after the circulating cooling water absorbs heat, it is put into the circulating cooling water treatment system 2 from the water discharge port at the bottom of the heat exchange washing tower 1, and the circulating cooling water is precipitated, filtered and added. After a series of treatment such as medicine neutralization, as the low-temperature heat source of the absorption heat pump, the circulating cooling water is discharged into the water storage tank 4 after being absorbed and cooled by the absorption heat pump. The driving heat source of the absorption heat pump comes from the low-pressure cylinder extraction of the steam turbine in the thermal power plant. The return water of the heat network enters the absorption heat pump as the working medium of the high-temperature heat source. The circulating cooling water in the water storage tank 4 is sent to the heat exchange washing tower 1 for recycling via the circulating water pump 5 and the flushing water pump 6 .
实施例2：Example 2:
如图3所示，本实施例换热系统3为冷却塔。其排放方法为：来自火电厂湿法脱硫塔出口的湿烟气由换热洗涤塔1的烟气入口进入，在换热洗涤塔1内由下向上行走，循环冷却水经由多层喷嘴雾化后由上向下行走，烟气与雾化的循环冷却水在换热洗涤塔1内逆流接触，发生强烈的传热传质过程，烟气被循环冷却水冷却，烟气中的水蒸气冷凝后产生大量凝结水进入循环冷却水中，烟气的显热和水蒸气的气化潜热被循环冷却水吸收，降温后的烟气继续上行，通过布置在换热洗涤塔1上部的除雾器，烟气中的大部分液滴被除雾器除去，同时烟气中的部分污染物(SO2/NOx/Hg/粉尘等)进入循环冷却水；降温后的烟气最终由换热洗涤塔1的烟气出口排出，经由引风机7进入烟囱排放至大气；循环冷却水吸热后由换热洗涤塔1底部的放水口放入循环冷却水处理系统2，循环冷却水经过沉淀、过滤及加药中和等一系列处理后，进入冷却塔，经过冷却塔，冷却后进入储水箱4，储水箱4中的循环冷却水经由循环水泵5和冲洗水泵6送入换热洗涤塔1循环利用。As shown in Figure 3, the heat exchange system 3 of this embodiment is a cooling tower. The discharge method is as follows: the wet flue gas from the outlet of the wet desulfurization tower of the thermal power plant enters through the flue gas inlet of the heat exchange scrubber 1, walks from bottom to top in the heat exchange scrubber 1, and the circulating cooling water is atomized through multi-layer nozzles After walking from top to bottom, the flue gas and the atomized circulating cooling water contact countercurrently in the heat exchange scrubber 1, and a strong heat and mass transfer process occurs, the flue gas is cooled by the circulating cooling water, and the water vapor in the flue gas condenses Afterwards, a large amount of condensed water enters the circulating cooling water, the sensible heat of the flue gas and the latent heat of vaporization of the water vapor are absorbed by the circulating cooling water, and the cooled flue gas continues upward, passing through the demister arranged on the upper part of the heat exchange washing tower 1, Most of the liquid droplets in the flue gas are removed by the demister, and at the same time, some pollutants in the flue gas (SO 2 /NOx/Hg/dust, etc.) enter the circulating cooling water; the flue gas after cooling is finally sent to the heat exchange scrubber 1 The flue gas is discharged from the outlet, enters the chimney through the induced draft fan 7, and is discharged to the atmosphere; after the circulating cooling water absorbs heat, it is put into the circulating cooling water treatment system 2 from the water discharge port at the bottom of the heat exchange washing tower 1, and the circulating cooling water is precipitated, filtered and added. After a series of treatments such as medicine neutralization, it enters the cooling tower, passes through the cooling tower, and enters the water storage tank 4 after cooling. The circulating cooling water in the water storage tank 4 is sent to the heat exchange washing tower 1 for recycling through the circulating water pump 5 and the flushing water pump 6.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420525877.8U CN204147740U (en) | 2014-09-12 | 2014-09-12 | The ultra-clean exhaust system of a kind of coal steam-electric plant smoke ultralow temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420525877.8U CN204147740U (en) | 2014-09-12 | 2014-09-12 | The ultra-clean exhaust system of a kind of coal steam-electric plant smoke ultralow temperature |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204147740U true CN204147740U (en) | 2015-02-11 |
Family
ID=52505893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420525877.8U Expired - Lifetime CN204147740U (en) | 2014-09-12 | 2014-09-12 | The ultra-clean exhaust system of a kind of coal steam-electric plant smoke ultralow temperature |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204147740U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104226088A (en) * | 2014-09-12 | 2014-12-24 | 中国华能集团清洁能源技术研究院有限公司 | Ultralow-temperature ultra-clean flue gas exhausting system and method for thermal power plant |
| CN106669342A (en) * | 2017-01-09 | 2017-05-17 | 南京龙源环保有限公司 | Novel demisting system |
| CN106765252A (en) * | 2016-12-23 | 2017-05-31 | 北京建筑大学 | A kind of fountain flue gas waste heat recovery and cleaning system |
| CN119158397A (en) * | 2024-09-24 | 2024-12-20 | 青岛宇清环境科技有限公司 | A high-efficiency energy-saving deacidification device and process method for hazardous waste incineration flue gas |
-
2014
- 2014-09-12 CN CN201420525877.8U patent/CN204147740U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104226088A (en) * | 2014-09-12 | 2014-12-24 | 中国华能集团清洁能源技术研究院有限公司 | Ultralow-temperature ultra-clean flue gas exhausting system and method for thermal power plant |
| CN106765252A (en) * | 2016-12-23 | 2017-05-31 | 北京建筑大学 | A kind of fountain flue gas waste heat recovery and cleaning system |
| CN106669342A (en) * | 2017-01-09 | 2017-05-17 | 南京龙源环保有限公司 | Novel demisting system |
| CN119158397A (en) * | 2024-09-24 | 2024-12-20 | 青岛宇清环境科技有限公司 | A high-efficiency energy-saving deacidification device and process method for hazardous waste incineration flue gas |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110425902A (en) | Flue gas waste heat recycling system and method after wet desulphurization | |
| CN101708414B (en) | System and method for desulphurizing waste gas by cyclic absorption and application thereof | |
| CN104226088A (en) | Ultralow-temperature ultra-clean flue gas exhausting system and method for thermal power plant | |
| CN107860153A (en) | A kind of energy-saving and water-saving type coal-burning boiler wet flue gas depth total system and method | |
| CN105169942A (en) | Glass melting furnace flue gas dust removal, desulfurization and denitrification cooperative treatment system and treatment method and application | |
| CN103721538A (en) | Integrated treatment and utilizing device for recovering and denitrating smoke waste heat and condensate water of natural gas | |
| CN106369623A (en) | System for removing smoke plumes through condensation, emission reduction, water collecting, heating and drying | |
| CN207379110U (en) | A kind of energy-saving and water-saving type coal-burning boiler wet flue gas depth total system | |
| CN110272082B (en) | Desulfurization waste water evaporation crystallization coupling flue gas reheat integrated system | |
| CN107781832A (en) | Wet desulfurization flue gas is dehydrated reheating UTILIZATION OF VESIDUAL HEAT IN minimum discharge system and method | |
| CN107327863A (en) | Suitable for the flue gas purification system and flue gas purifying method of gas turbine | |
| CN204147740U (en) | The ultra-clean exhaust system of a kind of coal steam-electric plant smoke ultralow temperature | |
| CN108465372A (en) | A kind of plume of condensation twice disappears white system | |
| CN109974062A (en) | A deep recovery system of flue gas waste heat using absorption heat pump and two-stage heat exchanger | |
| CN102980198B (en) | Washing condensing smoke triple recovery device | |
| CN110404380A (en) | A comprehensive system and method for sintering flue gas desulfurization, denitrification and flue gas whitening | |
| CN108759494A (en) | A kind of desulfurization dust-removing technique of the metal smelt tail gas without outer row | |
| CN209034090U (en) | A deep recovery system for ammonia desulfurization flue gas whitening waste heat | |
| CN205517263U (en) | Flue gas heat exchange energy conservation SOx/NOx control device | |
| CN103292303B (en) | A Latent Heat Recovery System for Water Vapor in Tail Gas of Sleep Activation Furnace | |
| CN205948591U (en) | System is got rid of to coal -fired flue gas deep purification plume | |
| CN105148706A (en) | Energy conservation and emission reduction integral method for natural gas boilers | |
| CN209405955U (en) | Waste incineration boiler flue gas ultra-low emission system | |
| CN115445423A (en) | Ammonia decarburization device and its operation method | |
| CN204042943U (en) | Desulfurization system for thermal power plant |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20150211 |