CN204665323U - A kind of based on water reclamation system in the flue gas of teflon heat exchanger - Google Patents
A kind of based on water reclamation system in the flue gas of teflon heat exchanger Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E20/30—Technologies for a more efficient combustion or heat usage
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Abstract
本实用新型涉及一种基于氟塑料换热器的烟气中水回收系统。目前还没有一种能有效地实现烟气中水回收的系统。本实用新型包括沿烟气流动方向依次安装在烟道上的空气预热器、除尘器、引风机、脱硫塔和烟囱，其特点是：还包括氟塑料换热器、冷凝液回收装置、烟气测温仪、热媒水回水管、热媒水进水管、电动调节阀、循环水泵、补水水箱和余热使用设备，氟塑料换热器安装在位于脱硫塔和烟囱之间的烟道上，冷凝液回收装置和氟塑料换热器固定，烟气测温仪安装在位于氟塑料换热器出口处的烟道上，热媒水回水管的一端连接在氟塑料换热器的热媒水出口上，该热媒水回水管的另一端连接在余热使用设备上。本实用新型的结构设计合理，能有效回收烟气中的水。
The utility model relates to a water recovery system in flue gas based on a fluoroplastic heat exchanger. At present, there is no system that can effectively realize water recovery in flue gas. The utility model includes an air preheater, a dust collector, an induced draft fan, a desulfurization tower and a chimney which are sequentially installed on the flue along the flow direction of the flue gas. Thermometer, heat medium water return pipe, heat medium water inlet pipe, electric control valve, circulating water pump, make-up water tank and waste heat utilization equipment, fluoroplastic heat exchanger is installed on the flue between the desulfurization tower and the chimney, and the condensate The recovery device and the fluoroplastic heat exchanger are fixed, the flue gas thermometer is installed on the flue at the outlet of the fluoroplastic heat exchanger, and one end of the heat medium water return pipe is connected to the heat medium water outlet of the fluoroplastic heat exchanger. The other end of the heat medium water return pipe is connected to the waste heat utilization equipment. The utility model has a reasonable structural design and can effectively recover the water in the flue gas.
Description
技术领域 technical field
本实用新型涉及一种烟气中水回收系统，尤其是涉及一种基于氟塑料换热器的烟气中水回收系统，主要用于火力发电厂中。 The utility model relates to a water recovery system in flue gas, in particular to a water recovery system in flue gas based on a fluoroplastic heat exchanger, which is mainly used in thermal power plants.
背景技术 Background technique
火力发电厂排烟携带的烟气余热量巨大，且烟气中含水量高，尤其是燃用褐煤的机组，排烟温度在150℃左右，烟气中的体积含水量则为15%左右，因此将排烟温度降低至水露点以下，使烟气中的水蒸气凝结，并将冷凝液回收利用，对解决我国尤其是北方电厂富煤缺水这一资源分布困局具有重大意义。另外，在烟气冷凝的过程中，气体组分被冷凝液反应、吸收，使得排烟中SO2、NOX、Hg等有害物质浓度得到有效降低，因此实现烟气中的水回收，对建设环境友好型、资源节约型社会具有重大意义。 The residual heat of flue gas carried by the smoke exhaust of thermal power plants is huge, and the water content in the flue gas is high. Especially for units burning lignite, the exhaust gas temperature is about 150°C, and the volumetric water content in the flue gas is about 15%. Therefore, reducing the exhaust gas temperature to below the water dew point, condensing the water vapor in the flue gas, and recycling the condensate is of great significance to solving the resource distribution dilemma of rich coal and water shortage in my country, especially in northern power plants. In addition, during the process of flue gas condensation, the gas components are reacted and absorbed by the condensate, which effectively reduces the concentration of harmful substances such as SO 2 , NO X , Hg in the flue gas. An environment-friendly and resource-saving society is of great significance.
针对烟气中水回收技术，本领域的技术人员做了大量的工作研究，如公开日为2012年12月05日，公开号为CN202577451U的中国专利中，公开了一种烟气中水分子捕集装置，该装置能够从除尘、脱硫后的烟气中捕集水分子，并将其冷凝、回收再次利用，减少系统的补水量，节约水资源。但该技术采用膜法水捕集技术，易出现石膏结垢的问题，能否适应燃煤质量多变的运行条件也还有待进一步研究，而且其运行维护及初期投资费用较高。若采用金属换热器对烟气中的水蒸气进行冷凝、回收利用，则无法避免换热器的低温腐蚀，导致换热器需要定期维护、使用年限有限等一系列问题。 Aiming at the recovery technology of water in flue gas, those skilled in the art have done a lot of work and research. For example, in the Chinese patent whose publication date is December 05, 2012 and whose publication number is CN202577451U, a kind of water molecule capture in flue gas is disclosed. The collection device, which can capture water molecules from the flue gas after dust removal and desulfurization, condense them, recycle them for reuse, reduce the amount of water replenishment in the system, and save water resources. However, this technology uses membrane water capture technology, which is prone to the problem of gypsum scaling, and whether it can adapt to the operating conditions of variable coal quality remains to be further studied, and its operation and maintenance and initial investment costs are relatively high. If a metal heat exchanger is used to condense and recycle the water vapor in the flue gas, the low-temperature corrosion of the heat exchanger cannot be avoided, resulting in a series of problems such as regular maintenance and limited service life of the heat exchanger.
综上所述，目前还没有一种结构设计合理，构思独特，能够有效地实现烟气中水回收的系统。 To sum up, there is currently no system with reasonable structure design, unique conception, and effective recovery of water in flue gas.
实用新型内容 Utility model content
本实用新型的目的在于克服现有技术中存在的上述不足，而提供一种结构设计合理，构思独特，能够有效地实现烟气中水回收功能的基于氟塑料换热器的烟气中水回收系统。 The purpose of the utility model is to overcome the above-mentioned deficiencies in the prior art, and to provide a water recovery in flue gas based on a fluoroplastic heat exchanger with reasonable structural design and unique conception, which can effectively realize the water recovery function in flue gas system.
本实用新型解决上述问题所采用的技术方案是：该基于氟塑料换热器的烟气中水回收系统包括沿烟气流动方向依次安装在烟道上的空气预热器、除尘器、引风机、脱硫塔和烟囱，其结构特点在于：还包括氟塑料换热器、冷凝液回收装置、烟气测温仪、热媒水回水管、热媒水进水管、电动调节阀、循环水泵、补水水箱和余热使用设备，所述氟塑料换热器安装在位于脱硫塔和烟囱之间的烟道上，所述冷凝液回收装置和氟塑料换热器固定，所述烟气测温仪安装在位于氟塑料换热器出口处的烟道上，所述热媒水回水管的一端连接在氟塑料换热器的热媒水出口上，该热媒水回水管的另一端连接在余热使用设备上，所述热媒水进水管的一端连接在氟塑料换热器的热媒水进口上，该热媒水进水管的另一端连接在余热使用设备上，所述电动调节阀、循环水泵和补水水箱均安装在热媒水进水管上，该电动调节阀、循环水泵和补水水箱沿热媒水进水管的一端到另一端的方向依次排列。 The technical solution adopted by the utility model to solve the above problems is: the water recovery system in the flue gas based on the fluoroplastic heat exchanger includes an air preheater, a dust collector, an induced draft fan, Desulfurization tower and chimney, the structural features are: also include fluoroplastic heat exchanger, condensate recovery device, flue gas thermometer, heat medium water return pipe, heat medium water inlet pipe, electric control valve, circulating water pump, water supply tank and waste heat utilization equipment, the fluoroplastic heat exchanger is installed on the flue between the desulfurization tower and the chimney, the condensate recovery device and the fluoroplastic heat exchanger are fixed, and the flue gas thermometer is installed in the flue On the flue at the outlet of the plastic heat exchanger, one end of the heat medium water return pipe is connected to the heat medium water outlet of the fluoroplastic heat exchanger, and the other end of the heat medium water return pipe is connected to the waste heat utilization equipment. One end of the heat medium water inlet pipe is connected to the heat medium water inlet of the fluoroplastic heat exchanger, and the other end of the heat medium water inlet pipe is connected to the waste heat utilization equipment. The electric control valve, circulating water pump and water supply tank are all Installed on the heat medium water inlet pipe, the electric regulating valve, the circulating water pump and the supplementary water tank are arranged in sequence along the direction from one end to the other end of the heat medium water inlet pipe.
作为优选，本实用新型还包括终端控制器，所述终端控制器通过导线分别连接在烟气测温仪和电动调节阀上。 As a preference, the utility model also includes a terminal controller, and the terminal controller is respectively connected to the flue gas temperature measuring instrument and the electric regulating valve through wires.
作为优选，本实用新型所述冷凝液回收装置固定在氟塑料换热器的底部。 As a preference, the condensate recovery device of the present invention is fixed at the bottom of the fluoroplastic heat exchanger.
作为优选，本实用新型所述氟塑料换热器为模块式组件结构。 As a preference, the fluoroplastic heat exchanger described in the present invention has a modular component structure.
本实用新型与现有技术相比，具有以下优点和效果：烟气中水回收系统的结构简单，构思独特，采用氟塑料换热器作为烟气中水回收系统的冷却器，降低烟气温度至水露点以下，氟塑料换热器不存在低温腐蚀、积灰问题，氟塑料换热器的使用年限在15年以上；另外氟塑料换热器为模块式组件，氟塑料换热器安装工程量小，维护方便。采用本实用新型技术避免了现有烟气中水回收系统存在的运行维护费用高，且初期投资大等问题，可有效地实现烟气中的水回收；同时，随着烟气中水蒸气的冷凝，SO2、NOX、Hg等物质被冷凝液吸附、反应，有效降低了SO2、NOX、Hg等有害物质的排放，环保效益显著。 Compared with the prior art, the utility model has the following advantages and effects: the structure of the water recovery system in the flue gas is simple, the concept is unique, and the fluoroplastic heat exchanger is used as the cooler of the water recovery system in the flue gas to reduce the temperature of the flue gas Below the water dew point, the fluoroplastic heat exchanger does not have low-temperature corrosion and dust accumulation problems, and the service life of the fluoroplastic heat exchanger is more than 15 years; in addition, the fluoroplastic heat exchanger is a modular component, and the installation project of the fluoroplastic heat exchanger Small quantity and easy maintenance. The technology of the utility model avoids the problems of high operation and maintenance costs and large initial investment in the existing flue gas water recovery system, and can effectively realize the water recovery in the flue gas; at the same time, with the water vapor in the flue gas Condensation, SO 2 , NO X , Hg and other substances are adsorbed and reacted by the condensate, effectively reducing the emission of SO 2 , NO X , Hg and other harmful substances, and the environmental protection benefits are remarkable.
附图说明 Description of drawings
图1是本实用新型实施例中基于氟塑料换热器的烟气中水回收系统的结构示意图。 Fig. 1 is a schematic structural diagram of a flue gas water recovery system based on a fluoroplastic heat exchanger in an embodiment of the present invention.
图中：1-空气预热器，2-除尘器，3-引风机，4-脱硫塔，5-氟塑料换热器，6-冷凝液回收装置，7-烟囱，8-烟气测温仪，9-热媒水回水管，10-热媒水进水管，11-终端控制器，12-电动调节阀，13-循环水泵，14-补水水箱，15-余热使用设备。 In the figure: 1-air preheater, 2-dust collector, 3-induced fan, 4-desulfurization tower, 5-fluoroplastic heat exchanger, 6-condensate recovery device, 7-chimney, 8-flue gas temperature measurement Instrument, 9-heat medium water return pipe, 10-heat medium water inlet pipe, 11-terminal controller, 12-electric control valve, 13-circulating water pump, 14-water supply tank, 15-waste heat use equipment.
具体实施方式 Detailed ways
下面结合附图并通过实施例对本实用新型作进一步的详细说明，以下实施例是对本实用新型的解释而本实用新型并不局限于以下实施例。 The utility model will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are explanations of the utility model and the utility model is not limited to the following examples.
实施例。 Example.
参见图1，本实施例中基于氟塑料换热器的烟气中水回收系统包括空气预热器1、除尘器2、引风机3、脱硫塔4、氟塑料换热器5、冷凝液回收装置6、烟囱7、烟气测温仪8、热媒水回水管9、热媒水进水管10、终端控制器11、电动调节阀12、循环水泵13、补水水箱14和余热使用设备15，空气预热器1、除尘器2、引风机3、脱硫塔4、氟塑料换热器5和烟囱7沿烟气流动方向依次安装在烟道上，即氟塑料换热器5安装在位于脱硫塔4和烟囱7之间的烟道上。本实施例采用氟塑料换热器5作为烟气冷却器，氟塑料换热器5通常为模块式组件结构，安装工程量小，维护和维修方便。 Referring to Fig. 1, the flue gas water recovery system based on fluoroplastic heat exchanger in this embodiment includes air preheater 1, dust collector 2, induced draft fan 3, desulfurization tower 4, fluoroplastic heat exchanger 5, condensate recovery Device 6, chimney 7, flue gas thermometer 8, heat medium water return pipe 9, heat medium water inlet pipe 10, terminal controller 11, electric control valve 12, circulating water pump 13, water supply tank 14 and waste heat utilization equipment 15, Air preheater 1, dust collector 2, induced draft fan 3, desulfurization tower 4, fluoroplastic heat exchanger 5 and chimney 7 are installed on the flue in sequence along the direction of flue gas flow, that is, fluoroplastic heat exchanger 5 is installed in the desulfurization tower On the flue between 4 and chimney 7. In this embodiment, the fluoroplastic heat exchanger 5 is used as the flue gas cooler. The fluoroplastic heat exchanger 5 is usually a modular component structure, with small installation work and convenient maintenance and repair.
本实施例中的冷凝液回收装置6和氟塑料换热器5固定，该冷凝液回收装置6通常固定在氟塑料换热器5的底部。烟气测温仪8安装在位于氟塑料换热器5出口处的烟道上，用于监视氟塑料换热器5尾部的烟气温度。热媒水回水管9的一端连接在氟塑料换热器5的热媒水出口上，该热媒水回水管9的另一端连接在余热使用设备15上。 The condensate recovery device 6 and the fluoroplastic heat exchanger 5 in this embodiment are fixed, and the condensate recovery device 6 is usually fixed at the bottom of the fluoroplastic heat exchanger 5 . The flue gas temperature detector 8 is installed on the flue at the outlet of the fluoroplastic heat exchanger 5 for monitoring the flue gas temperature at the tail of the fluoroplastic heat exchanger 5 . One end of the heat medium water return pipe 9 is connected to the heat medium water outlet of the fluoroplastic heat exchanger 5 , and the other end of the heat medium water return pipe 9 is connected to the waste heat utilization equipment 15 .
本实施例中热媒水进水管10的一端连接在氟塑料换热器5的热媒水进口上，该热媒水进水管10的另一端连接在余热使用设备15上，电动调节阀12、循环水泵13和补水水箱14均安装在热媒水进水管10上，该电动调节阀12、循环水泵13和补水水箱14沿热媒水进水管10的一端到另一端的方向依次排列。终端控制器11通过导线分别连接在烟气测温仪8和电动调节阀12上。 In this embodiment, one end of the heat medium water inlet pipe 10 is connected to the heat medium water inlet of the fluoroplastic heat exchanger 5, the other end of the heat medium water inlet pipe 10 is connected to the waste heat utilization equipment 15, and the electric regulating valve 12, Circulating water pump 13 and supplementary water tank 14 are all installed on the heat medium water inlet pipe 10, and the electric control valve 12, circulating water pump 13 and supplementary water tank 14 are arranged in sequence along the direction from one end to the other end of the heat medium water inlet pipe 10. The terminal controller 11 is respectively connected to the flue gas temperature measuring instrument 8 and the electric regulating valve 12 through wires.
本实施例中基于氟塑料换热器的烟气中水回收方法的步骤如下：烟气沿烟道依次流经空气预热器1、除尘器2、引风机3、脱硫塔4、氟塑料换热器5和烟囱7，当烟气流经氟塑料换热器5时，烟气加热氟塑料换热器5内的热媒水产生高温热媒水，烟气温度降低至水露点以下，烟气中的水蒸气凝结产生冷凝液，冷凝液由冷凝液回收装置6收集，随着烟气中水蒸气的冷凝，烟气中所含的SO2、NOX和Hg被冷凝液吸附、反应；热媒水吸收烟气热量产生高温热媒水，高温热媒水经热媒水回水管9进入余热使用设备15，在余热使用设备15内放热后产生热媒水，经热媒水进水管10回到氟塑料换热器5；在氟塑料换热器5出口处的烟气温度未降低至水露点以下时，通过烟气测温仪8将检测到的信号反馈给终端控制器11，由终端控制器11调节热媒水进水管10上的电动调节阀12的开度，以增大热媒水的水流量，保证氟塑料换热器5尾部的烟气温度降低至水露点以下。 The steps of the method for recovering water from flue gas based on the fluoroplastic heat exchanger in this embodiment are as follows: the flue gas flows through the air preheater 1, the dust collector 2, the induced draft fan 3, the desulfurization tower 4, and the fluoroplastic heat exchanger sequentially along the flue. Heater 5 and chimney 7, when the flue gas flows through the fluoroplastic heat exchanger 5, the flue gas heats the heat medium water in the fluoroplastic heat exchanger 5 to generate high temperature heat medium water, the temperature of the flue gas drops below the water dew point, and the flue gas The water vapor in the gas condenses to produce condensate, which is collected by the condensate recovery device 6. With the condensation of water vapor in the flue gas, SO 2 , NO X and Hg contained in the flue gas are absorbed and reacted by the condensate; The heat medium water absorbs the heat of the flue gas to generate high temperature heat medium water. The high temperature heat medium water enters the waste heat utilization equipment 15 through the heat medium water return pipe 9, and generates heat medium water after releasing heat in the waste heat utilization equipment 15, and passes through the heat medium water inlet pipe. 10 Return to the fluoroplastic heat exchanger 5; when the flue gas temperature at the outlet of the fluoroplastic heat exchanger 5 is not lowered below the water dew point, the detected signal is fed back to the terminal controller 11 through the flue gas thermometer 8, The opening of the electric control valve 12 on the heat medium water inlet pipe 10 is adjusted by the terminal controller 11 to increase the water flow of the heat medium water and ensure that the flue gas temperature at the tail of the fluoroplastic heat exchanger 5 is lowered below the water dew point.
本实施例中的氟塑料换热器5布置于脱硫塔4后烟囱7前的烟道中，脱硫塔4后的烟气被氟塑料换热器5内的热媒水水冷却，温度降低至水露点以下，烟气中的水蒸气凝结成冷凝液并被冷凝液回收装置6收集，烟气中不凝结的成分则通过烟囱7排入大气。氟塑料换热器5通过热媒水进水管10、热媒水回水管9与余热使用设备15连接，氟塑料换热器5内的热媒水吸收烟气的热量后，经热媒水回水管9进入余热使用设备15，在余热使用设备15内放热后由热媒水进水管10回到氟塑料换热器5，如此循环；氟塑料换热器5尾部烟道装有烟气测温仪8，用于监视氟塑料换热器5尾部的烟气温度。热媒水进水管10上装有电动调节阀12、循环水泵13及补水水箱14，补水水箱14用于存储热媒水并对流经氟塑料换热器5的热媒水补水，保证氟塑料换热器5内的热媒水水量，确保氟塑料换热器5出口烟温降低至水露点温度以下。 The fluoroplastic heat exchanger 5 in this embodiment is arranged in the flue in front of the chimney 7 behind the desulfurization tower 4, and the flue gas behind the desulfurization tower 4 is cooled by the heat medium water in the fluoroplastic heat exchanger 5, and the temperature is reduced to water. Below the dew point, the water vapor in the flue gas condenses into condensate and is collected by the condensate recovery device 6, and the non-condensable components in the flue gas are discharged into the atmosphere through the chimney 7. The fluoroplastic heat exchanger 5 is connected to the waste heat utilization equipment 15 through the heat medium water inlet pipe 10 and the heat medium water return pipe 9. After the heat medium water in the fluoroplastic heat exchanger 5 absorbs the heat of the flue gas, it returns to The water pipe 9 enters the waste heat utilization equipment 15, and after the heat is released in the waste heat utilization equipment 15, the heat medium water inlet pipe 10 returns to the fluoroplastic heat exchanger 5, and so on; the tail flue of the fluoroplastic heat exchanger 5 is equipped with a flue gas detector. A thermometer 8 is used to monitor the flue gas temperature at the tail of the fluoroplastic heat exchanger 5 . The heat medium water inlet pipe 10 is equipped with an electric regulating valve 12, a circulating water pump 13 and a replenishing water tank 14. The replenishing water tank 14 is used for storing heat medium water and replenishing water for the heat medium water flowing through the fluoroplastic heat exchanger 5 to ensure the heat exchange of the fluoroplastic The amount of heat medium water in the device 5 ensures that the flue gas temperature at the outlet of the fluoroplastic heat exchanger 5 is reduced to below the water dew point temperature.
此外，需要说明的是，本说明书中所描述的具体实施例，其零、部件的形状、所取名称等可以不同，本说明书中所描述的以上内容仅仅是对本实用新型结构所作的举例说明。凡依据本实用新型专利构思所述的构造、特征及原理所做的等效变化或者简单变化，均包括于本实用新型专利的保护范围内。本实用新型所属技术领域的技术人员可以对所描述的具体实施例做各种各样的修改或补充或采用类似的方式替代，只要不偏离本实用新型的结构或者超越本权利要求书所定义的范围，均应属于本实用新型的保护范围。 In addition, it should be noted that the specific embodiments described in this specification may be different in parts, shapes and names of parts, and the above content described in this specification is only an illustration of the structure of the present invention. All equivalent changes or simple changes based on the structure, features and principles described in the utility model patent concept are included in the protection scope of the utility model patent. Those skilled in the technical field to which the utility model belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the definition defined in the claims scope, all should belong to the protection scope of the present utility model.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832939A (en) * | 2015-04-28 | 2015-08-12 | 杭州华电能源工程有限公司 | System and method for recovering water of smoke based on fluorine plastic heat exchanger |
| CN106678771A (en) * | 2016-08-05 | 2017-05-17 | 杭州华电能源工程有限公司 | Air heater and low-low temperature economizer coupled energy-saving and environmental-friendly integrated system and method based on fluoroplastic heat exchanger |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832939A (en) * | 2015-04-28 | 2015-08-12 | 杭州华电能源工程有限公司 | System and method for recovering water of smoke based on fluorine plastic heat exchanger |
| CN106678771A (en) * | 2016-08-05 | 2017-05-17 | 杭州华电能源工程有限公司 | Air heater and low-low temperature economizer coupled energy-saving and environmental-friendly integrated system and method based on fluoroplastic heat exchanger |
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