CN209109431U - A soluble particulate matter spray device - Google Patents
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Abstract
Description
技术领域technical field
本实用新型属于大气污染控制技术领域，特别涉及一种可溶性颗粒物喷射装置。The utility model belongs to the technical field of air pollution control, in particular to a soluble particulate matter spraying device.
背景技术Background technique
燃煤电厂在煤燃烧过程中会产生一定比例的SO3，排放到大气中会造成空气污染。近年来，随着环保政策的日益严格，特别是超低排放改造之后，燃煤电厂普遍采用SCR脱硝装置控制烟气中NOX的排放量。目前，SCR脱硝装置均采用含钒催化剂，除了能有效催化还原NOX，还能有效催化氧化SO2，使SO2转变成SO3。如此一来，排放到大气中的SO3除了燃烧过程产生的一部分，还有脱硝装置催化转化产生的一部分，大大增加了SO3排放量，也为污染物控制工作带来巨大压力。Coal-fired power plants will produce a certain proportion of SO 3 in the process of coal combustion, which will cause air pollution when discharged into the atmosphere. In recent years, with the increasingly strict environmental protection policies, especially after the ultra-low emission transformation, coal-fired power plants generally use SCR denitrification devices to control the emission of NO X in flue gas. At present, SCR denitration devices all use vanadium-containing catalysts, which can not only effectively catalyze reduction of NO X , but also effectively catalyze the oxidation of SO 2 to convert SO 2 into SO 3 . In this way, the SO 3 emitted into the atmosphere is not only a part of the combustion process, but also a part of the catalytic conversion of the denitrification device, which greatly increases the SO 3 emission and brings great pressure to the pollution control work.
目前，对烟气中SO3的控制技术，主要有低温电除尘器技术和湿式电除尘器技术，石灰石-石膏湿法脱硫工艺也能脱除一部分，但脱除量有限。采用除尘技术，则需进行除尘器改造，投资大，成本高。如何从SCR脱硝装置上游控制SO3浓度，是当前科技工作者的主要研究方向之一，并取得一定成效，例如向烟道中喷入碱性吸收剂的工艺，就是典型的控制烟气中SO3的新技术，该技术采用喷射装置向烟气中喷射碱性吸收剂(一种可溶性颗粒物)，利用碱性吸收剂吸收烟气中的SO3，从而实现烟气中SO3脱除的目的。但是实际应用中发现，由于碱性吸收剂的吸湿性、与其他酸性气体反应和装置启停过程的清扫不彻底，导致喷射系统存在堵塞现象。因此，开发一种具有自清洁性能的可溶性颗粒物喷射装置十分必要。At present, the control technologies for SO 3 in flue gas mainly include low temperature electrostatic precipitator technology and wet electrostatic precipitator technology. The limestone-gypsum wet desulfurization process can also remove part of it, but the amount of removal is limited. If the dust removal technology is adopted, the dust collector needs to be transformed, which requires a large investment and a high cost. How to control SO 3 concentration from the upstream of SCR denitration device is one of the main research directions of current scientific and technological workers, and has achieved certain results. For example, the process of spraying alkaline absorbent into the flue is a typical control of SO 3 in flue gas. It is a new technology that uses a spray device to spray alkaline absorbent (a kind of soluble particulate matter) into the flue gas, and uses the alkaline absorbent to absorb SO 3 in the flue gas, so as to achieve the purpose of removing SO 3 in the flue gas. However, in practical application, it is found that the injection system is blocked due to the hygroscopicity of the alkaline absorbent, the reaction with other acid gases and the incomplete cleaning during the start-up and shutdown of the device. Therefore, it is necessary to develop a soluble particle spraying device with self-cleaning properties.
实用新型内容Utility model content
为了克服现有技术存在的不足，本实用新型提供了一种可溶性颗粒物喷射装置。In order to overcome the deficiencies of the prior art, the utility model provides a soluble particulate matter spraying device.
一种可溶性颗粒物喷射装置，所述装置包括颗粒物料斗、流化风机、高压水箱和喷枪，所述颗粒物料斗通过下料管与喷枪相连通，所述流化风机一端与流化风机进风口相连通，流化风机另一端通过流化风管道与喷枪相连通，所述高压水箱通过高压水管、高压水泵与喷枪相连通。A soluble particle injection device, the device includes a particle material hopper, a fluidized fan, a high-pressure water tank and a spray gun, the particle material hopper is communicated with the spray gun through a feeding pipe, and one end of the fluidized fan is communicated with the fluidized fan air inlet. , the other end of the fluidization fan is communicated with the spray gun through the fluidization air pipeline, and the high-pressure water tank is communicated with the spray gun through a high-pressure water pipe and a high-pressure water pump.
本实用新型可溶性颗粒物喷射装置用于向烟道中喷射颗粒物，颗粒物以流化风为载体形成流化态，从喷嘴中喷入烟道，使喷出的颗粒物拥有一定的射程和覆盖率，喷射的颗粒物具有水溶性。The soluble particulate matter injection device of the utility model is used for spraying the particulate matter into the flue. The particulate matter takes the fluidized wind as a carrier to form a fluidized state, and is sprayed into the flue from the nozzle, so that the sprayed particulate matter has a certain range and coverage. Particulate matter is water-soluble.
作为优选，所述流化风管道上设有压力监测仪。用于判断喷嘴堵塞情况。Preferably, a pressure monitor is provided on the fluidizing air duct. Used to determine whether the nozzle is clogged.
作为优选，所述下料管上设有下料管阀门，流化风管道上设有流化风管道阀门，高压水管上设有高压水管阀门。通过各阀门(截止阀)可以对下料管、流化风管路和高压水管进行逻辑性截流，水、气、固三相进行技术性匹配，实现颗粒物的喷射功能和喷射装置的清洁功能。Preferably, the feeding pipe is provided with a feeding pipe valve, the fluidizing air pipe is provided with a fluidizing air pipe valve, and the high-pressure water pipe is provided with a high-pressure water pipe valve. Through each valve (stop valve), the feeding pipe, the fluidization air pipeline and the high-pressure water pipe can be logically closed, and the three phases of water, gas and solid can be matched technically, so as to realize the spraying function of particulate matter and the cleaning function of the spraying device.
作为优选，所述喷枪一端设有喷嘴，所述喷嘴伸入烟道内，喷枪的另一端固定在烟道壁上。Preferably, one end of the spray gun is provided with a nozzle, the nozzle extends into the flue, and the other end of the spray gun is fixed on the wall of the flue.
作为优选，所述喷枪为三相流喷枪，所述三相流喷枪为单喷嘴直吹喷枪、单喷嘴直角喷枪、多喷嘴直角喷枪中的一种。三相流喷枪及喷嘴为耐磨耐腐蚀材料制造，可以选用不锈钢管、內衬陶瓷管、镀纳米材料管、特质合金等具有类似功能的材料。Preferably, the spray gun is a three-phase flow spray gun, and the three-phase flow spray gun is one of a single-nozzle straight-blowing spray gun, a single-nozzle right-angle spray gun, and a multi-nozzle right-angle spray gun. The three-phase flow spray gun and nozzle are made of wear-resistant and corrosion-resistant materials. Stainless steel tubes, lined ceramic tubes, nano-material-plated tubes, special alloys and other materials with similar functions can be selected.
作为优选，所述喷枪长度为0.5～5m，喷嘴内径为10～100mm。Preferably, the length of the spray gun is 0.5-5 m, and the inner diameter of the nozzle is 10-100 mm.
本实用新型的有益效果在于：The beneficial effects of the present utility model are:
1、具有深度清洁颗粒物堵塞功能；1. It has the function of deep cleaning particle blockage;
2、投资省、不产生二次污染；2. Low investment and no secondary pollution;
3、协同SO3脱除技术推广，解决SO3脱除技术应用难题；3. Cooperate with the promotion of SO 3 removal technology to solve the application problems of SO 3 removal technology;
4、成套组装、应用方便；4. Complete assembly and easy application;
5、应用领域扩展性强，具有广泛推广价值。5. The application field is highly scalable and has extensive promotion value.
附图说明Description of drawings
图1是本实用新型可溶性颗粒物喷射装置水平布置结构示意图；1 is a schematic diagram of the horizontal arrangement of the soluble particulate matter injection device of the present invention;
图2是本实用新型可溶性颗粒物喷射装置垂直布置结构示意图；2 is a schematic diagram of the vertical arrangement of the soluble particulate matter spray device of the present invention;
图3是本发明单喷嘴直吹喷枪的结构示意图；Fig. 3 is the structural representation of the single-nozzle straight-blowing spray gun of the present invention;
图4是本发明单喷嘴直角喷枪的结构示意图；Fig. 4 is the structural representation of the single-nozzle right-angle spray gun of the present invention;
图5是本发明多喷嘴直角喷枪的结构示意图。5 is a schematic structural diagram of a multi-nozzle right-angle spray gun of the present invention.
具体实施方式Detailed ways
下面结合附图和具体实施例对本实用新型作进一步说明，但本实用新型所要保护的范围并不限于此。The present utility model will be further described below with reference to the accompanying drawings and specific embodiments, but the scope of protection of the present utility model is not limited thereto.
参照图1～5，一种可溶性颗粒物喷射装置，所述装置包括颗粒物料斗1、流化风机3、高压水箱7和喷枪4，所述颗粒物料斗1通过下料管2与喷枪4相连通，所述流化风机3一端与流化风机进风口3-1相连通，流化风机另一端通过流化风管道3-3与喷枪4相连通，所述高压水箱7通过高压水管7-1、高压水泵8与喷枪4相连通。1 to 5, a soluble particulate matter injection device, the device includes a granular material hopper 1, a fluidization fan 3, a high-pressure water tank 7 and a spray gun 4, the particle material hopper 1 is communicated with the spray gun 4 through the feeding pipe 2, so One end of the fluidizing fan 3 is communicated with the air inlet 3-1 of the fluidizing fan, the other end of the fluidizing fan is communicated with the spray gun 4 through the fluidizing air duct 3-3, and the high-pressure water tank 7 is communicated with the high-pressure water pipe 7-1 and the high-pressure water pipe 7-1. The water pump 8 communicates with the spray gun 4 .
所述流化风管道3-3上设有压力监测仪3-2，用于判断喷嘴堵塞情况。所述喷枪4一端设有喷嘴5，所述喷嘴5伸入烟道6内，喷枪4的另一端固定在烟道壁6-1上，所述喷枪长度为0.5～5m，喷嘴内径为10～100mm。所述下料管2上设有下料管阀门2-1，流化风管道3-3上设有流化风管道阀门3-4，高压水管7-1上设有高压水管阀门7-2。通过各阀门(截止阀)可以对下料管、流化风管路和高压水管进行逻辑性截流，水、气、固三相进行技术性匹配，实现颗粒物的喷射功能和喷射装置的清洁功能。The fluidizing air duct 3-3 is provided with a pressure monitor 3-2 for judging the blockage of the nozzle. One end of the spray gun 4 is provided with a nozzle 5, the nozzle 5 extends into the flue 6, the other end of the spray gun 4 is fixed on the flue wall 6-1, the length of the spray gun is 0.5-5 m, and the inner diameter of the nozzle is 10-10 m 100mm. The feeding pipe 2 is provided with a feeding pipe valve 2-1, the fluidizing air pipe 3-3 is provided with a fluidizing air pipe valve 3-4, and the high-pressure water pipe 7-1 is provided with a high-pressure water pipe valve 7-2 . Through each valve (stop valve), the feeding pipe, the fluidization air pipeline and the high-pressure water pipe can be logically closed, and the three phases of water, gas and solid can be matched technically, so as to realize the spraying function of particulate matter and the cleaning function of the spraying device.
参照图3～5，所述喷枪为三相流喷枪，所述三相流喷枪为单喷嘴直吹喷枪4-1、单喷嘴直角喷枪4-2、多喷嘴直角喷枪4-3中的一种。三相流喷枪及喷嘴为耐磨耐腐蚀材料制造，可以选用不锈钢管、內衬陶瓷管、镀纳米材料管、特质合金等具有类似功能的材料。3 to 5, the spray gun is a three-phase flow spray gun, and the three-phase flow spray gun is one of a single-nozzle straight-blowing spray gun 4-1, a single-nozzle right-angle spray gun 4-2, and a multi-nozzle right-angle spray gun 4-3 . The three-phase flow spray gun and nozzle are made of wear-resistant and corrosion-resistant materials. Stainless steel tubes, lined ceramic tubes, nano-material-plated tubes, special alloys and other materials with similar functions can be selected.
本实用新型可溶性颗粒物喷射装置既适合水平布置，如图1所示，也适合垂直布置，如图2所示。The soluble particulate matter injection device of the present invention is suitable for both horizontal arrangement, as shown in Figure 1, and vertical arrangement, as shown in Figure 2.
本实用新型可溶性颗粒物喷射装置用于向烟道中喷射颗粒物，颗粒物以流化风为载体形成流化态，从喷嘴中喷入烟道，使喷出的颗粒物拥有一定的射程和覆盖率，喷射的颗粒物具有水溶性。The soluble particulate matter injection device of the utility model is used for spraying the particulate matter into the flue. The particulate matter takes the fluidized wind as a carrier to form a fluidized state, and is sprayed into the flue from the nozzle, so that the sprayed particulate matter has a certain range and coverage. Particulate matter is water-soluble.
上述可溶性颗粒物喷射装置的具体实施过程是：The specific implementation process of the above-mentioned soluble particulate matter injection device is:
按照技术要求设计好颗粒物料斗1、下料管2、流化风机3、高压水箱7、高压水泵8、三相流喷枪4、三相流喷嘴5及其辅助设施，然后根据工艺要求安装好，三相流喷枪4固定端固定在烟道壁6-1上，三相流喷嘴5伸入烟道的烟气流中，保证整套装置能正常工作。According to the technical requirements, design the granular material hopper 1, the feeding pipe 2, the fluidization fan 3, the high-pressure water tank 7, the high-pressure water pump 8, the three-phase flow spray gun 4, the three-phase flow nozzle 5 and its auxiliary facilities, and then install it according to the process requirements. The fixed end of the three-phase flow spray gun 4 is fixed on the flue wall 6-1, and the three-phase flow nozzle 5 extends into the flue gas flow of the flue to ensure that the entire device can work normally.
进入工作状态，首先开启流化风管道3-3上的流化风管道阀门3-4和流化风机3，空气从流化风机进风口3-1吸入，经过流化风机3压缩后吹出，使整个三相流喷枪4内部充满流化风；此时，打开下料管2上的下料管阀门2-1，储存在颗粒物料斗1中的颗粒物通过下料管2进入三相流喷枪4中，在流化风的作用下形成流化态，然后通过三相流喷嘴5喷入烟道，实现烟气中SO3脱除的目的；正常工作状态下，保持系统连续运行。其中，所述流化风机通过压缩空气形成高压气流，所述高压气流全压为10～70kPa，保证颗粒物以流化态喷入烟道。Enter the working state, first open the fluidizing air duct valve 3-4 and the fluidizing fan 3 on the fluidizing air duct 3-3, the air is sucked from the air inlet 3-1 of the fluidizing fan, compressed by the fluidizing fan 3 and then blown out, The entire three-phase flow spray gun 4 is filled with fluidized wind; at this time, the discharge pipe valve 2-1 on the discharge pipe 2 is opened, and the particles stored in the particle material hopper 1 enter the three-phase flow spray gun 4 through the discharge pipe 2 In the process, a fluidized state is formed under the action of the fluidizing wind, and then sprayed into the flue through the three-phase flow nozzle 5 to achieve the purpose of removing SO 3 in the flue gas; under normal working conditions, the system is kept running continuously. Wherein, the fluidizing fan forms a high-pressure airflow through compressed air, and the full pressure of the high-pressure airflow is 10-70 kPa, so as to ensure that the particulate matter is sprayed into the flue in a fluidized state.
当流化风机3流化风管道3-3上的压力监测仪3-2，示值超出正常工作范围时，说明出现颗粒物堵塞三相流喷嘴5的情况，需要对三相流喷嘴5进行清洁，以保证三相流喷枪4及三相流喷嘴5畅通；此时，关闭下料管2上的下料管阀门2-1，流化风机3继续向三相流喷枪4提供流化风，观测压力监测仪3-2示值变化，示值变化不大时，则需采用高压水对三相流喷枪4进行冲洗；此时，在上述前提下，停流化风机3，关闭流化风管道3-3上流化风管道阀门3-4，开启高压水管7-1上的高压水管阀门7-2和高压水泵8，高压水箱7的水在高压水泵8的作用下形成高压水流冲洗三相流喷枪4及三相流喷嘴5，同时可溶性颗粒物溶解在高压水流中，随高压水流冲入烟道，实现清洁三相流喷嘴5的功能。When the pressure monitor 3-2 on the fluidizing air duct 3-3 of the fluidizing fan 3 shows a value beyond the normal working range, it means that the three-phase flow nozzle 5 is blocked by particles, and the three-phase flow nozzle 5 needs to be cleaned. , to ensure that the three-phase flow spray gun 4 and the three-phase flow nozzle 5 are unobstructed; at this time, close the discharge pipe valve 2-1 on the discharge pipe 2, and the fluidization fan 3 continues to provide fluidization wind to the three-phase flow spray gun 4, Observe the change of the indication value of the pressure monitor 3-2. When the indication value does not change much, it is necessary to use high-pressure water to flush the three-phase flow spray gun 4; Pipeline 3-3 is connected to the fluidized air pipe valve 3-4, and the high-pressure water pipe valve 7-2 and high-pressure water pump 8 on the high-pressure water pipe 7-1 are opened. The water in the high-pressure water tank 7 forms a high-pressure water flow under the action of the high-pressure water pump 8 to flush three phases The flow spray gun 4 and the three-phase flow nozzle 5, while the soluble particles are dissolved in the high-pressure water flow, and rush into the flue with the high-pressure water flow to realize the function of cleaning the three-phase flow nozzle 5.
考虑到高温条件下烟气会烘干三相流喷嘴5末端的液滴，或液滴与飞灰混合，形成结晶或灰垢，引起堵塞，在高压水流冲洗的后期(渐停高压水泵8)即开启流化风管道3-3上的流化风管道阀门3-4和流化风机3，形成气水两相混合物，进一步清洁三相流喷枪4，然后，关闭高压水泵8和高压水管7-1上的高压水管阀门7-2，利用流化风快速吹扫三相流喷枪4及三相流喷嘴5，直至三相流喷枪4及三相流喷嘴5中的水渍完全清除。Considering that the flue gas will dry the droplets at the end of the three-phase flow nozzle 5 under high temperature conditions, or the droplets will mix with fly ash to form crystallization or ash scale, causing blockage. That is to open the fluidizing air duct valve 3-4 and the fluidizing fan 3 on the fluidizing air duct 3-3 to form a gas-water two-phase mixture, further clean the three-phase flow spray gun 4, and then close the high-pressure water pump 8 and the high-pressure water pipe 7 The high-pressure water pipe valve 7-2 on -1 uses the fluidized wind to quickly purge the three-phase flow spray gun 4 and the three-phase flow nozzle 5 until the water stains in the three-phase flow spray gun 4 and the three-phase flow nozzle 5 are completely removed.
若压力监测仪3-2示值指示正常，则开启下料管2上的下料管阀门2-1，使三相流喷射装置重新开始正常工作，若压力监测仪3-2示值恢复缓慢，则重复上述操作步骤，直至三相流喷射装置恢复正常工作。If the indication value of the pressure monitor 3-2 is normal, open the feeding pipe valve 2-1 on the feeding pipe 2, so that the three-phase flow jetting device starts to work normally again. If the indication value of the pressure monitor 3-2 recovers slowly , repeat the above operation steps until the three-phase flow injection device resumes normal operation.
本实用新型具有深度清洁颗粒物堵塞功能，协同SO3脱除技术推广，可以解决SO3脱除技术应用难题，本实用新型可溶性颗粒物喷射装置可以可靠运行10年以上。The utility model has the function of deeply cleaning the blockage of particulate matter, and in conjunction with the promotion of SO 3 removal technology, the application problem of SO 3 removal technology can be solved, and the soluble particulate matter injection device of the utility model can operate reliably for more than 10 years.
上述实施例为本发明较佳的实施方式，但本发明技术并不受上述实施例的限制，其他的任何未背离本发明的实质与原理下所作的改变、修饰、替代、组合、简化，均应为等效的置换方式，都包含在本发明的保护范围之内。The above-mentioned embodiments are preferred embodiments of the present invention, but the technology of the present invention is not limited by the above-mentioned embodiments, and any other changes, modifications, substitutions, combinations, and simplifications made without departing from the essence and principle of the present invention are all Should be equivalent replacement manners, all are included within the protection scope of the present invention.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108889480A (en) * | 2018-09-13 | 2018-11-27 | 浙江大学 | A kind of sol particle object injection apparatus and clean method |
| CN117899650A (en) * | 2024-03-20 | 2024-04-19 | 山东方大清洁能源科技股份有限公司 | Environment-friendly boiler flue gas purification device |
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2018
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108889480A (en) * | 2018-09-13 | 2018-11-27 | 浙江大学 | A kind of sol particle object injection apparatus and clean method |
| CN108889480B (en) * | 2018-09-13 | 2023-10-17 | 浙江大学 | A soluble particulate matter injection device and cleaning method |
| CN117899650A (en) * | 2024-03-20 | 2024-04-19 | 山东方大清洁能源科技股份有限公司 | Environment-friendly boiler flue gas purification device |
| CN117899650B (en) * | 2024-03-20 | 2024-05-31 | 山东方大清洁能源科技股份有限公司 | Environment-friendly boiler flue gas purification device |
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