WO2019228547A1 - Industrial flue gas treatment method and industrial flue gas treatment system - Google Patents

Industrial flue gas treatment method and industrial flue gas treatment system Download PDF

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WO2019228547A1
WO2019228547A1 PCT/CN2019/095355 CN2019095355W WO2019228547A1 WO 2019228547 A1 WO2019228547 A1 WO 2019228547A1 CN 2019095355 W CN2019095355 W CN 2019095355W WO 2019228547 A1 WO2019228547 A1 WO 2019228547A1
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flue gas
ammonia
industrial
inlet
industrial flue
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吕志玉
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郑州市天之蓝环保科技有限公司
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    • B01DSEPARATION
    • B01D53/00Separation 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
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    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • B01D2251/306Alkali metal compounds of potassium
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    • B01D2258/0283Flue gases

Abstract

The present invention relates to an industrial flue gas treatment method and an industrial flue gas treatment system, belonging to the technical field of flue gas emission treatment. The industrial flue gas treatment method comprises the following steps: mixing industrial flue gas, a desulphurisation agent and ammonia, and performing desulphurisation treatment to obtain desulphurised flue gas; performing denitration treatment on the desulphurised flue gas. The industrial flue gas treatment method comprises the desulphurisation treatment process and the denitration treatment process, and the industrial flue gas is mixed with the desulphurisation agent and the ammonia before the desulphurisation treatment so that during the desulphurisation treatment, in addition to the desulphurisation agent performing a desulphurisation reaction with the industrial flue gas to remove acid gas therein, the ammonia also reacts with some of the acid gas to perform a desulphurisation reaction, thereby significantly improving the desulphurisation effect. In addition, the ammonia is mixed with the industrial flue gas so that the ammonia is as fully mixed as possible with the industrial flue gas during the desulphurisation reaction process in order to help increase the denitration reaction efficiency during the subsequent denitration reaction process.

Description

一种工业烟气处理方法及工业烟气处理系统Industrial flue gas treatment method and industrial flue gas treatment system 技术领域Technical field
本发明涉及一种工业烟气处理方法及工业烟气处理系统,属于烟气排放处理技术领域。The invention relates to an industrial flue gas treatment method and an industrial flue gas treatment system, and belongs to the technical field of flue gas emission treatment.
背景技术Background technique
工业上的烟气处理通常需要进行脱硫、脱硝、除尘等处理。现有技术中很多工业烟气处理都是将这三种处理独立进行,导致需要的设备庞大,工艺复杂,投资成本非常大。Industrial flue gas treatment usually requires desulfurization, denitration, and dust removal. In the prior art, many industrial flue gas treatments are carried out independently of these three types of treatments, resulting in large equipment requirements, complex processes, and very high investment costs.
为了简化工艺、降低成本,将三种处理技术联合使用具有比较好的效果。申请公布号为CN105233644A的中国发明专利公开了一种燃煤锅炉除尘脱硫脱硝复合工艺,燃煤锅炉的烟气由省煤器出口和省煤器上腔内抽出的烟气混合在一起,温度为300-500℃,经挡板除尘器预除尘去掉40-50%的粉尘后,依次进入Dg250多管除尘器和Dg160多管除尘器内,并把脱硫剂仓内脱硫剂及Dg250多管除尘器灰斗排出的部分粗粉尘和未反应的脱硫剂一起喷入Dg250多管除尘器进气仓腔内,进行除尘脱硫,脱硫剂为CaO,除尘后的烟气再进入陶瓷过滤膜过滤器,还原剂仓同时向陶瓷过滤膜过滤器内喷入还原剂。In order to simplify the process and reduce costs, the combined use of the three treatment technologies has a better effect. The Chinese invention patent with application publication number CN105233644A discloses a composite process for dust removal, desulfurization and denitration of a coal-fired boiler. The flue gas of the coal-fired boiler is mixed by the economizer outlet and the flue gas extracted from the upper cavity of the economizer. The temperature is 300-500 ℃, after the pre-dust removal of the baffle dust collector to remove 40-50% of the dust, enter the Dg250 multi-tube dust collector and Dg160 multi-tube dust collector in turn, and put the desulfurizer in the desulfurizer warehouse and the Dg250 multi-tube dust collector Part of the coarse dust discharged from the ash hopper and the unreacted desulfurizing agent are sprayed into the inlet chamber of the Dg250 multi-tube dust collector for dust removal and desulfurization. The desulfurizing agent is CaO, and the flue gas after the dust removal enters the ceramic filter membrane filter to reduce The agent tank simultaneously sprays the reducing agent into the ceramic filter membrane filter.
微孔陶瓷过滤管是支撑体,过滤膜是高温硅酸铝纤维软纸,过滤膜表面缠绕碳纤维,工作时过滤膜表面的粉尘层形成过滤层,阻止了粉尘进入微孔陶瓷过滤管内。该脱硫脱硝复合工艺具有联合脱硫脱硝并除尘的特点,工艺相对简单。但是,该工艺仍然存在脱硝效率较低等问题。The microporous ceramic filter tube is a support body, the filter membrane is a high-temperature aluminum silicate fiber soft paper, and the surface of the filter membrane is wrapped with carbon fiber. The dust layer on the surface of the filter membrane forms a filter layer during work, preventing dust from entering the microporous ceramic filter tube. The desulfurization and denitration composite process has the characteristics of combined desulfurization and denitration and dust removal, and the process is relatively simple. However, the process still has problems such as low denitration efficiency.
发明内容Summary of the Invention
本发明的目的在于提供一种脱硝效果好的工业烟气处理方法。The object of the present invention is to provide an industrial flue gas treatment method with good denitration effect.
本发明的目的还在于提供一种工业烟气处理系统。The object of the present invention is also to provide an industrial flue gas treatment system.
为实现上述目的,本发明的工业烟气处理方法的技术方案是:To achieve the above object, the technical scheme of the industrial flue gas treatment method of the present invention is:
方案1:一种工业烟气处理方法,包括如下步骤:Option 1: An industrial flue gas treatment method, including the following steps:
1)将工业烟气、脱硫剂、氨混合进行脱硫处理,得到脱硫烟气;1) Mix industrial flue gas, desulfurizing agent and ammonia for desulfurization treatment to obtain desulfurized flue gas;
2)然后将步骤1)得到的脱硫烟气进行脱硝处理,即得。2) Then, the desulfurized flue gas obtained in step 1) is subjected to a denitration treatment to obtain it.
本发明的工业烟气处理方法包括脱硫处理过程和脱硝处理过程,在脱硫处理之前,将工业烟气与脱硫剂及氨混合,这样在脱硫处理时,除了脱硫剂可以与工业烟气进行脱硫反应除去其中的酸性气体,氨也可以与部分酸性气体反应进行脱硫反应,大大提高了脱硫效果。另 外,氨与工业烟气混合,也可以使得氨在脱硫反应过程中与工业烟气最大限度地充分混合,有利于在后续的脱硝反应过程中提高脱硝反应的效率。The industrial flue gas treatment method of the present invention includes a desulfurization treatment process and a denitration treatment process. Before the desulfurization treatment, the industrial flue gas is mixed with a desulfurization agent and ammonia, so that during the desulfurization treatment, in addition to the desulfurization agent, a desulfurization reaction can be performed with the industrial flue gas. After removing the acid gas, ammonia can also react with part of the acid gas for desulfurization reaction, which greatly improves the desulfurization effect. In addition, mixing ammonia with industrial flue gas can also make ammonia and industrial flue gas fully and fully mixed during the desulfurization reaction process, which is beneficial to improve the efficiency of the denitration reaction in the subsequent denitration reaction process.
方案2:在方案1的基础上,步骤1)中工业烟气的温度为290-400℃,优选为330-380℃。进一步优选为350-380℃。该工业烟气是将工业排放的烟气进行降温后得到的。工业排放的烟气温度为520-540℃。工业排放的烟气中SO x的含量为2000mg/Nm 3。NO x的含量为3000mg/Nm 3。粉尘含量为1500mg/Nm 3Scheme 2: On the basis of Scheme 1, the temperature of the industrial flue gas in step 1) is 290-400 ° C, preferably 330-380 ° C. It is more preferably 350-380 ° C. The industrial flue gas is obtained after the industrial exhaust flue gas is cooled. Flue gas temperature for industrial emission is 520-540 ° C. The content of SO x in industrially emitted flue gas is 2000 mg / Nm 3 . The content of NO x was 3000 mg / Nm 3 . The dust content was 1500 mg / Nm 3 .
方案3:在方案1的基础上,所述脱硫剂为石灰、碳酸氢钠、碳酸氢钾、氢氧化钠、氢氧化钾中的一种或者几种。优选为石灰石、生石灰或者熟石灰。进一步优选的,所述石灰为氢氧化钙。Scheme 3: On the basis of Scheme 1, the desulfurizing agent is one or more of lime, sodium bicarbonate, potassium bicarbonate, sodium hydroxide, and potassium hydroxide. It is preferably limestone, quicklime or slaked lime. Further preferably, the lime is calcium hydroxide.
方案4:在方案1的基础上,步骤1)中的脱硫剂为粉料。Scheme 4: On the basis of Scheme 1, the desulfurizing agent in step 1) is powder.
方案5:在方案1的基础上,所述氨是氨气、液氨、氨水、尿素中的一种。Scheme 5: On the basis of Scheme 1, the ammonia is one of ammonia gas, liquid ammonia, ammonia water, and urea.
方案6:在方案1的基础上,所述脱硫处理时加入碱。所述碱为氢氧化钠、氢氧化钾中的一种或者两种以上。Scheme 6: On the basis of Scheme 1, a base is added during the desulfurization treatment. The base is one kind or two or more kinds of sodium hydroxide and potassium hydroxide.
方案7:在方案6的基础上,所述碱为碱溶液。所述碱溶液的质量分数为1-10%。Scheme 7: On the basis of Scheme 6, the base is an alkali solution. The mass fraction of the alkaline solution is 1-10%.
方案8:在方案1-7中的任意一种方案的基础上,所述工业烟气、脱硫剂、氨混合是先将工业烟气与脱硫剂混合,然后再与氨混合。Scheme 8: On the basis of any one of Schemes 1-7, the industrial flue gas, desulfurizing agent, and ammonia are mixed by mixing industrial flue gas with the desulfurizing agent and then with ammonia.
方案9:在方案1-7中的任意一种方案的基础上,所述脱硫烟气进行气固分离,分离得到的固体作为脱硫剂与工业烟气、氨混合进行脱硫处理。Scheme 9: On the basis of any one of Schemes 1-7, the desulfurized flue gas is subjected to gas-solid separation, and the separated solid is used as a desulfurizer to be mixed with industrial flue gas and ammonia for desulfurization treatment.
方案10:在方案1-7中的任意一种方案的基础上,步骤2)中进行脱硫脱硝处理后的烟气进行气固分离,得到的固体作为脱硫剂与工业烟气、氨混合进行脱硫处理。分离得到的固体包括未反应的石灰,还包括脱硫反应的产物以及工业烟气中的颗粒物。Scheme 10: On the basis of any of the schemes 1-7, the flue gas after the desulfurization and denitration treatment in step 2) is subjected to gas-solid separation, and the obtained solid is used as a desulfurizing agent, mixed with industrial flue gas and ammonia to perform desulfurization. deal with. The separated solids include unreacted lime, the products of the desulfurization reaction, and particulate matter in industrial flue gas.
方案11:在方案1-7中的任意一种方案的基础上,步骤2)中将脱硫剂与脱硫烟气混合后进行脱硝处理。此处的将脱硫剂与脱硫烟气混合是在脱硫烟气进行脱硝处理之前,向脱硫烟气中补充添加脱硫剂,以提高在脱硝处理过程中,脱硫反应的程度。Scheme 11: On the basis of any one of Schemes 1-7, in step 2), the desulfurizing agent is mixed with the desulfurizing flue gas, and then the denitration treatment is performed. The mixing of the desulfurizing agent and the desulfurizing flue gas is to add a desulfurizing agent to the desulfurizing flue gas before the desulfurizing flue gas is subjected to denitration treatment, so as to increase the degree of desulfurization reaction during the denitration treatment process.
方案12:在方案1-7中的任意一种方案的基础上,步骤2)中经过脱硫脱硝处理后的烟气与步骤1)中与脱硫剂、氨混合前的工业烟气进行降温处理。Scheme 12: On the basis of any one of Schemes 1-7, the flue gas after the desulfurization and denitration treatment in step 2) and the industrial flue gas before being mixed with the desulfurizing agent and ammonia in step 1) are subjected to a cooling treatment.
方案13:在方案12的基础上,所述降温处理是将工业烟气降温至290-400℃,优选为330-380℃。Scheme 13: On the basis of Scheme 12, the cooling process is to lower the industrial flue gas to 290-400 ° C, preferably 330-380 ° C.
方案14:在方案12的基础上,所述降温处理为换热降温处理。所述换热降温处理是将工业烟气与低温气体或者低温烟气换热。Scheme 14: On the basis of Scheme 12, the cooling process is a heat exchange cooling process. The heat exchange and temperature reduction process is to exchange industrial flue gas with low temperature gas or low temperature flue gas.
方案15:在方案14的基础上,所述低温烟气为脱硝处理后的烟气。经过脱硝处理后的烟气进行换热处理后排放。Scheme 15: On the basis of Scheme 14, the low-temperature flue gas is flue gas after denitration treatment. The flue gas after denitration treatment is discharged after heat exchange treatment.
本发明的工业烟气处理系统的技术方案是:The technical scheme of the industrial flue gas treatment system of the present invention is:
方案1:一种工业烟气处理系统,包括脱硫反应器、脱硝反应器;所述脱硫反应器上设置有第一烟气进口、第一烟气出口、氨加入口;所述脱硝反应器上设置有第二烟气进口、第二烟气出口;所述第二烟气进口与第一烟气出口相连通。Scheme 1: an industrial flue gas treatment system, comprising a desulfurization reactor and a denitration reactor; the desulfurization reactor is provided with a first flue gas inlet, a first flue gas outlet, and an ammonia inlet; A second flue gas inlet and a second flue gas outlet are provided; the second flue gas inlet is in communication with the first flue gas outlet.
本发明的工业烟气处理系统包括脱硫反应器,脱硫反应器上除了设置有烟气进口和烟气出口外,还设置有氨加入口,可以在脱硫反应前或者脱硫反应过程中加入氨,使氨在脱硫反应过程中促进脱硫反应的充分程度。The industrial flue gas treatment system of the present invention includes a desulfurization reactor. In addition to a flue gas inlet and a flue gas outlet, an ammonia inlet is provided on the desulfurization reactor, and ammonia can be added before or during the desulfurization reaction so that The degree to which ammonia promotes the desulfurization reaction during the desulfurization reaction.
方案2:在方案1的基础上,所述工业烟气处理系统还包括脱硫剂加料管路。Scheme 2: On the basis of Scheme 1, the industrial flue gas treatment system further includes a desulfurizing agent feeding pipeline.
方案3:在方案1的基础上,所述工业烟气处理系统还包括脱硫剂加料管路、第一进气管路及混合管路,所述混合管路的出料口与所述第一烟气进口相连,所述脱硫剂加料管路及第一进气管路均与混合管路的进料口相连,第一进气管路用于向混合管路输入工业烟气,方便实现脱硫剂加料管路加入的脱硫剂与工业烟气的混合。Scheme 3: On the basis of Scheme 1, the industrial flue gas treatment system further includes a desulfurizing agent feeding pipeline, a first inlet pipeline, and a mixing pipeline, and the outlet of the mixing pipeline and the first smoke The gas inlet is connected, and the desulfurizing agent feeding pipe and the first air inlet pipe are both connected to the inlet of the mixing pipe. The first air inlet pipe is used to input industrial flue gas to the mixing pipe, which is convenient to realize the desulfurizing agent charging pipe. Mix the desulfurizing agent added with the industrial flue gas.
方案4:在方案3的基础上,所述混合管路包括混合器。进一步优选的,所述混合器优选为静态混合器。Embodiment 4: On the basis of Embodiment 3, the mixing pipeline includes a mixer. Further preferably, the mixer is preferably a static mixer.
方案5:在方案3的基础上,所述脱硫反应器上设置有碱加入口。Scheme 5: On the basis of Scheme 3, an alkali inlet is provided on the desulfurization reactor.
方案6:在方案5的基础上,所述碱加入口上连接有碱供料装置。优选的,所述碱供料装置为碱液供料装置。Scheme 6: On the basis of Scheme 5, an alkali feeding device is connected to the alkali adding port. Preferably, the alkali feeding device is an alkali liquid feeding device.
方案7:在方案5的基础上,所述脱硫反应器上还设置有与碱加入口相连的碱液喷料装置。Scheme 7: On the basis of Scheme 5, the desulfurization reactor is further provided with an alkali liquid spraying device connected to the alkali adding port.
方案8:在方案1的基础上,所述氨加入口上连接有氨供料装置。进一步优选的,所述氨供料装置为氨水供料装置。Scheme 8: On the basis of Scheme 1, an ammonia feed device is connected to the ammonia inlet. Further preferably, the ammonia supply device is an ammonia water supply device.
方案9:在方案1的基础上,所述脱硫反应器上设置有与氨加入口相连的氨水喷料装置。Scheme 9: On the basis of Scheme 1, the desulfurization reactor is provided with an ammonia water spraying device connected to the ammonia inlet.
方案10:在方案1的基础上,所述脱硫反应器内设置有文丘里结构。Scheme 10: On the basis of Scheme 1, a venturi structure is provided in the desulfurization reactor.
方案11:在方案1的基础上,所述脱硫反应器上设置有空气入口。具体的,所述空气入口设置在碱液喷料装置和/或氨水喷料装置上,以促使碱液或氨水雾化喷出。Scheme 11: On the basis of Scheme 1, an air inlet is provided on the desulfurization reactor. Specifically, the air inlet is provided on the lye spraying device and / or the ammonia water spraying device to promote atomization and spraying of the lye or ammonia water.
方案12:在方案1的基础上,所述脱硝反应器包括集尘器。Scheme 12: On the basis of Scheme 1, the denitration reactor includes a dust collector.
方案13:在方案12的基础上,集尘器与脱硫反应器相连。Option 13: On the basis of Option 12, the dust collector is connected to the desulfurization reactor.
方案14:在方案1的基础上,脱硝反应器为陶瓷过滤器。具体的,为硅酸铝陶瓷过滤器 或硅酸镁陶瓷过滤器或者硅酸钙陶瓷过滤器。Scheme 14: On the basis of Scheme 1, the denitration reactor is a ceramic filter. Specifically, it is an aluminum silicate ceramic filter, a magnesium silicate ceramic filter, or a calcium silicate ceramic filter.
方案15:在方案1的基础上,所述工业烟气处理系统还包括烟气除尘装置,烟气除尘装置串接在脱硫反应器和脱硝反应器之间;所述脱硫反应器上还设置有尘料进口,烟气除尘装置的尘料出口与脱硫反应器上的尘料进口相连。优选的,所述烟气除尘装置包括旋风除尘器。Scheme 15: On the basis of Scheme 1, the industrial flue gas treatment system further includes a flue gas dust removing device, and the flue gas dust removing device is connected in series between the desulfurization reactor and the denitration reactor; the desulfurization reactor is further provided with The dust inlet, the dust outlet of the flue gas dust removal device is connected to the dust inlet on the desulfurization reactor. Preferably, the flue gas dust removing device includes a cyclone dust collector.
方案16:在方案15的基础上,所述尘料出口上连接有循环箱,所述循环箱的进料口与尘料出口相连,循环箱的出料口与脱硫反应器的尘料进口相连。Scheme 16: On the basis of Scheme 15, a circulation box is connected to the dust outlet, the feed inlet of the circulation box is connected to the dust outlet, and the outlet of the circulation box is connected to the dust inlet of the desulfurization reactor. .
方案17:在方案1-16中任意一项方案的基础上,所述工业烟气处理系统还包括用来向脱硝反应器中加入脱硫剂的脱硫剂补料管路。Scheme 17: On the basis of any one of Schemes 1-16, the industrial flue gas treatment system further includes a desulfurizing agent feed line for adding a desulfurizing agent to the denitration reactor.
方案18:在方案1-16中任意一项方案的基础上,所述工业烟气处理系统还包括换热器,所述换热器包括第一换热进口、第一换热出口、第二换热进口、第二换热出口,第一换热进口与工业烟气提供装置相连,第一换热出口与脱硫反应器的第一烟气进口相连,第二换热进口与脱硝反应器的第二烟气出口相连。优选的,所述换热器为换热锅炉。Scheme 18: On the basis of any one of Schemes 1-16, the industrial flue gas treatment system further includes a heat exchanger, and the heat exchanger includes a first heat exchange inlet, a first heat exchange outlet, and a second Heat exchange inlet, second heat exchange outlet, the first heat exchange inlet is connected to the industrial flue gas supply device, the first heat exchange outlet is connected to the first flue gas inlet of the desulfurization reactor, and the second heat exchange inlet is connected to the denitration reactor. The second flue gas outlet is connected. Preferably, the heat exchanger is a heat exchange boiler.
方案19:在方案18的基础上,换热器的第二换热出口连接有排放管路。Scheme 19: On the basis of Scheme 18, the second heat exchange outlet of the heat exchanger is connected with a discharge pipe.
本发明的有益效果:The beneficial effects of the present invention:
本发明的工业烟气处理方法和系统,能够实现脱硫率超过95%,脱硝率超过96.7%,除尘率超过99.34%。粉尘含量可以低至5mg/Nm 3。在保证脱硫效率、脱硝效率及除尘效率均较高的同时,本发明的工业烟气处理系统还具有运行稳定、处理持久性强的特点,在具体使用时,使用寿命长,无需对除尘脱硝部件进行经常替换或者维修。 The industrial flue gas treatment method and system of the present invention can achieve a desulfurization rate exceeding 95%, a denitration rate exceeding 96.7%, and a dust removal rate exceeding 99.34%. The dust content can be as low as 5mg / Nm 3 . While ensuring high desulfurization efficiency, denitration efficiency and dust removal efficiency, the industrial flue gas treatment system of the present invention also has the characteristics of stable operation and strong processing durability. In specific use, it has a long service life and does not require dust removal and denitration components. Perform frequent replacements or repairs.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
图1为实施例2的工业烟气处理系统结构示意图。FIG. 1 is a schematic structural diagram of an industrial flue gas treatment system of Embodiment 2.
具体实施方式Detailed ways
下面结合具体实施例对本发明的实施方式作进一步说明。下面实施例中的工业烟气为玻璃窑炉烟气。The following further describes the implementation manner of the present invention with specific examples. The industrial flue gas in the following examples is glass furnace flue gas.
本发明的工业烟气处理方法的实施例,包括如下步骤:An embodiment of the industrial flue gas treatment method of the present invention includes the following steps:
1)采用工业排放的烟气作为本实施例的工业烟气,工业烟气的温度为380℃。1) The industrial flue gas is used as the industrial flue gas of this embodiment, and the temperature of the industrial flue gas is 380 ° C.
2)将步骤1)中得到的380℃的工业烟气与作为脱硫剂的高纯氢氧化钙(Ca(OH) 2)粉料均匀混合,然后通入脱硫反应器中并使烟气向上运行,同时向脱硫反应器中通入氨水,并与上升的烟气混合。高温的烟气将氨水汽化得到氨气和水,水附着在脱硫剂氢氧化钙颗粒表面,烟气中的酸性气体SO x、HCl、HF等溶于水后并与氢氧化钙颗粒反应以除去烟气中的酸性气体,得到脱硫烟气。 2) The industrial flue gas at 380 ° C obtained in step 1) is uniformly mixed with the high-purity calcium hydroxide (Ca (OH) 2 ) powder as a desulfurizing agent, and then passed into the desulfurization reactor and the flue gas is operated upwards at the same time. Ammonia water was passed into the desulfurization reactor and mixed with the rising flue gas. The high-temperature flue gas vaporizes ammonia water to obtain ammonia gas and water. The water adheres to the surface of the calcium hydroxide particles of the desulfurizing agent. The acid gases SO x , HCl, and HF in the flue gas are dissolved in water and reacted with the calcium hydroxide particles to remove it. Desulfurized flue gas is obtained by the acidic gas in the flue gas.
3)步骤2)中反应后的脱硫烟气通入脱硝反应器,进行脱硝处理。3) The desulfurized flue gas after the reaction in step 2) is passed into a denitration reactor for denitration treatment.
作为上述工业烟气处理方法的实施例的改进,将高温工业烟气先进行降温,降温至380℃。该降温可以是将高温工业烟气与其他低温气体换热进行降温。高温工业烟气的温度为530℃。As an improvement of the above embodiment of the industrial flue gas treatment method, the high-temperature industrial flue gas is first cooled down to 380 ° C. The cooling may be performed by exchanging heat between high-temperature industrial flue gas and other low-temperature gases. The temperature of the high-temperature industrial flue gas is 530 ° C.
作为上述工业烟气处理方法的实施例的改进,步骤3)中的脱硝反应后的烟气作为低温气体与高温工业烟气进行换热,以对高温工业烟气进行降温。高温工业烟气经过降温后与脱硫剂混合。脱硝反应后的烟气换热后进行排放。As an improvement of the above embodiment of the industrial flue gas treatment method, the flue gas after the denitration reaction in step 3) is used as a low-temperature gas to exchange heat with the high-temperature industrial flue gas to cool the high-temperature industrial flue gas. The high-temperature industrial flue gas is mixed with a desulfurizing agent after cooling. The flue gas after the denitration reaction is discharged after heat exchange.
作为上述工业烟气处理方法的实施例的改进,上述步骤2)中通入氨水的同时还通入碱液。进一步的,还通入空气。具体的,通入空气是将空气与碱液或者氨水混合后喷出。As an improvement of the above embodiment of the industrial flue gas treatment method, in the above step 2), ammonia water is passed along with lye. Further, air is also introduced. Specifically, when the air is passed in, the air is mixed with the lye or ammonia and sprayed.
上述步骤2)中向脱硫反应器中通入氨水、碱液的顺序是依次通入氨水、碱液。实际操作时,也可以采取其他顺序。In the above step 2), the order of passing ammonia water and lye into the desulfurization reactor is to sequentially pass ammonia water and lye. In actual operation, other orders can also be taken.
氨水与高温烟气混合后变成氨气,氨气作为后续脱硝反应的脱硝剂,可以提前与烟气进行混合均匀,有利于提高后续脱硝反应的效率。另外,氨气也可以与烟气中的酸性气体反应,提高脱硫的程度。Ammonia water is mixed with high temperature flue gas to become ammonia gas. As a denitration agent for subsequent denitration reaction, ammonia gas can be mixed with the flue gas in advance, which is beneficial to improve the efficiency of the subsequent denitration reaction. In addition, ammonia gas can also react with the acidic gas in the flue gas to increase the degree of desulfurization.
作为上述工业烟气处理方法的实施例的改进,步骤2)中工业烟气与脱硫剂的混合可以采用如下方式:将脱硫剂直接加入脱硫反应器中。具体是,将工业烟气通入脱硫反应器中后,使其由下向上运动的过程中,向脱硫反应器中喷入脱硫剂,使脱硫剂与工业烟气充分混合。此时的混合顺序是,先将脱硫剂与烟气混合,然后再使氨水、碱液依次与烟气混合。在其他实施例中,氨水也可以与脱硫剂同时加入,或者先加入氨水,然后加入脱硫剂。As an improvement of the above embodiment of the industrial flue gas treatment method, the mixing of the industrial flue gas and the desulfurizing agent in step 2) may be adopted as follows: the desulfurizing agent is directly added to the desulfurization reactor. Specifically, after the industrial flue gas is passed into the desulfurization reactor, the desulfurization agent is sprayed into the desulfurization reactor during the process of moving from the bottom to the top, so that the desulfurization agent is fully mixed with the industrial flue gas. The mixing sequence at this time is to first mix the desulfurizing agent with the flue gas, and then sequentially mix the ammonia water and the lye with the flue gas. In other embodiments, ammonia water may be added at the same time as the desulfurizing agent, or ammonia water is added first, and then the desulfurizing agent is added.
作为上述工业烟气处理方法的实施例的改进,氨水、碱液、空气中的碱液和/或空气可以不加入。As an improvement of the above embodiment of the industrial flue gas treatment method, ammonia water, lye, lye in air and / or air may not be added.
作为上述工业烟气处理方法的实施例的改进,步骤2)中得到的脱硫烟气进行气固分离,气固分离后的固体返回脱硫反应器中作为脱硫剂与烟气反应,实现循环利用。气固分离可采用除尘器。如可采用旋风除尘器。分离得到的固体包括未反应的石灰,还包括脱硫反应的产物以及工业烟气中的颗粒物。As an improvement of the embodiment of the industrial flue gas treatment method described above, the desulfurized flue gas obtained in step 2) is subjected to gas-solid separation, and the solid after the gas-solid separation is returned to the desulfurization reactor to react with the flue gas as a desulfurizing agent to realize recycling. Dust collector can be used for gas-solid separation. If applicable, cyclone dust collector. The separated solids include unreacted lime, the products of the desulfurization reaction, and particulate matter in industrial flue gas.
上述工业烟气处理方法的实施例中脱硫剂也可以使用其他脱硫剂,如石灰石、生石灰(CaO),也可以采用石灰石、生石灰(CaO)、熟石灰(Ca(OH) 2)中的几种的混合物。上述碱液也可由水替换。氨水也可以由氨气替换,直接向脱硫反应器中通入氨气或液氨。 In the embodiment of the above industrial flue gas treatment method, other desulfurizing agents can also be used, such as limestone, quicklime (CaO), and several kinds of limestone, quicklime (CaO), and slaked lime (Ca (OH) 2 ) can also be used. mixture. The lye may be replaced by water. The ammonia water can also be replaced by ammonia gas, and ammonia gas or liquid ammonia is directly passed into the desulfurization reactor.
碱液中的碱可以为氢氧化钠、氢氧化钾中的一种或者两种以上。碱溶液的质量分数为1-10%。优选的碱液为浓度为3%的氢氧化钠溶液。The alkali in the lye may be one or two or more of sodium hydroxide and potassium hydroxide. The mass fraction of the alkaline solution is 1-10%. A preferred lye is a 3% sodium hydroxide solution.
作为上述工业烟气处理方法的实施例的改进,脱硫烟气进入脱硝反应器之前,向其中加 入脱硫剂粉料与脱硫烟气进行混合。该操作可以使脱硫烟气在脱硝反应之前补充脱硫剂。此处的脱硫剂仍然可以是石灰石、生石灰(CaO)、熟石灰(Ca(OH) 2)中的一种或几种的混合物。 As an improvement of the above embodiment of the industrial flue gas treatment method, before the desulfurized flue gas enters the denitration reactor, a desulfurizer powder is added to the desulfurized flue gas and mixed with the desulfurized flue gas. This operation enables the desulfurization flue gas to be supplemented with a desulfurization agent before the denitration reaction. The desulfurizing agent here may still be one or a mixture of one of limestone, quicklime (CaO), and slaked lime (Ca (OH) 2 ).
作为上述工业烟气处理方法的实施例的改进,步骤2)中进行脱硫脱硝处理后的烟气进行气固分离,得到的固体作为石灰与工业烟气、氨混合进行脱硫处理。气固分离仍然可以采用除尘器,如旋风除尘器。As an improvement of the embodiment of the industrial flue gas treatment method described above, the flue gas after the desulfurization and denitration treatment in step 2) is subjected to gas-solid separation, and the obtained solid is used as lime to be mixed with industrial flue gas and ammonia for desulfurization treatment. Air-solid separation can still use dust collectors, such as cyclones.
下面提供本发明的工业烟气处理方法的优选实施例:The following provides preferred embodiments of the industrial flue gas treatment method of the present invention:
实施例1Example 1
本实施例的工业烟气处理方法包括如下步骤:The industrial flue gas treatment method of this embodiment includes the following steps:
1)将温度为530℃的高温工业烟气先进行降温,该降温可以是将高温工业烟气与其他低温气体换热进行降温,降温后,工业烟气的温度为380℃。1) The high-temperature industrial flue gas with a temperature of 530 ° C is first cooled down. The cooling may be performed by exchanging heat between high-temperature industrial flue gas and other low-temperature gases. After the temperature is reduced, the temperature of the industrial flue gas is 380 ° C.
2)将步骤1)中得到的380℃的工业烟气与作为脱硫剂的高纯氢氧化钙(Ca(OH) 2)粉料均匀混合,然后通入脱硫反应塔中并使烟气向上运行,形成流化床,同时向脱硫反应器中喷入氨水、碱液(氢氧化钠溶液),并使氨水、碱液与上升的烟气混合。高温的烟气将氨水汽化得到氨气和水,将碱液汽化得到碱和水,水附着在脱硫剂氢氧化钙颗粒表面,烟气中的酸性气体SO x、HCl、HF等溶于水后并与氢氧化钙颗粒反应以除去烟气中的酸性气体,得到脱硫烟气。 2) The industrial flue gas at 380 ° C obtained in step 1) and the high-purity calcium hydroxide (Ca (OH) 2 ) powder as a desulfurizing agent are uniformly mixed, and then passed into the desulfurization reaction tower and the flue gas is operated upward to form In a fluidized bed, ammonia water and lye (sodium hydroxide solution) are sprayed into the desulfurization reactor, and the ammonia water and lye are mixed with the rising flue gas. The high-temperature flue gas vaporizes ammonia water to obtain ammonia gas and water, and the lye is vaporized to obtain alkali and water. The water is attached to the surface of the calcium hydroxide particles of the desulfurizing agent, and the acid gases SO x , HCl, HF in the flue gas are dissolved in water. It reacts with calcium hydroxide particles to remove the acid gas in the flue gas to obtain desulfurized flue gas.
3)对步骤2)中得到的脱硫烟气进行气固分离。该气固分离是将脱硫烟气进行除尘处理。除尘处理后得到的固体返回步骤2)中作为脱硫剂循环使用。3) Gas-solid separation of the desulfurized flue gas obtained in step 2). The gas-solid separation is a process for removing dust from the desulfurized flue gas. The solid obtained after the dedusting treatment is returned to step 2) for recycling as a desulfurizing agent.
4)步骤3)中气固分离后的气体,即除尘处理后的脱硫烟气,先与脱硫剂氢氧化钙粉料进行混合,然后通入脱硝反应器,进行脱硫脱硝处理。脱硝处理时,作为脱硝剂的氨气与烟气中的氮氧化物NOx反应,脱除烟气中的氮氧化物。在此过程中,脱硫剂氢氧化钙粉料仍然可以继续对烟气中脱硫处理,将烟气中残留的酸性气体充分脱除。上述脱硫脱硝处理过程中,烟气中的固体颗粒可以沉积并被收集起来,实现除尘。4) The gas after the solid-solid separation in step 3), that is, the desulfurization flue gas after the dust removal treatment, is first mixed with the desulfurizing agent calcium hydroxide powder, and then passed into the denitration reactor for desulfurization and denitration treatment. During the denitration process, ammonia gas used as a denitration agent reacts with nitrogen oxides NOx in the flue gas to remove the nitrogen oxides in the flue gas. In this process, the desulfurizing agent calcium hydroxide powder can still continue the desulfurization treatment in the flue gas, and fully remove the acid gas remaining in the flue gas. During the above-mentioned desulfurization and denitration treatment, solid particles in the flue gas can be deposited and collected to achieve dust removal.
5)步骤4)中除尘过程收集到的固体颗粒返回步骤2)中作为脱硫剂,继续与工业烟气混合,实现循环利用。步骤4)中,脱硫脱硝处理并除尘后的烟气返回第1)步作为低温气体与高温工业烟气进行热交换,然后进行排放。5) The solid particles collected in the dust removal process in step 4) are returned to step 2) as a desulfurizing agent, and continue to be mixed with industrial flue gas to achieve recycling. In step 4), the flue gas after the desulfurization and denitration treatment and dust removal is returned to step 1) as a low-temperature gas and a high-temperature industrial flue gas is exchanged, and then discharged.
本实施例中,步骤1)中的工业排放的烟气中SO x的含量为2000mg/Nm 3。NO x的含量为3000mg/Nm 3。粉尘含量为1500mg/Nm 3In this embodiment, the content of SO x in the industrially emitted flue gas in step 1) is 2000 mg / Nm 3 . The content of NO x was 3000 mg / Nm 3 . The dust content was 1500 mg / Nm 3 .
步骤3)中气固分离后的烟气的温度为365℃,其中SO x的含量为2000mg/Nm 3,NO x的 含量为3000mg/Nm 3,粉尘含量为7348mg/Nm 3The temperature of the flue gas after the gas-solid separation in step 3) is 365 ° C, wherein the content of SO x is 2000 mg / Nm 3 , the content of NO x is 3000 mg / Nm 3 , and the content of dust is 7348 mg / Nm 3 .
步骤4)中脱硝处理后的烟气的温度为350℃,其中SO x的含量为50mg/Nm 3,NO x的含量为100mg/Nm 3,粉尘含量为10mg/Nm 3The temperature of the flue gas after the denitration treatment in step 4) is 350 ° C., wherein the content of SO x is 50 mg / Nm 3 , the content of NO x is 100 mg / Nm 3 , and the content of dust is 10 mg / Nm 3 .
即脱硫效率为95%,脱硝效率为96.7%,除尘效率为99.34%。That is, the desulfurization efficiency is 95%, the denitration efficiency is 96.7%, and the dust removal efficiency is 99.34%.
本发明的工业烟气处理系统的实施例包括脱硫反应器、脱硝反应器。本实施例中,脱硫反应器为半干法脱硫反应塔。脱硝反应器为陶瓷过滤器。Examples of the industrial flue gas treatment system of the present invention include a desulfurization reactor and a denitration reactor. In this embodiment, the desulfurization reactor is a semi-dry desulfurization reaction tower. The denitration reactor is a ceramic filter.
脱硫反应器上设置有第一烟气进口、第一烟气出口、氨加入口、碱加入口。第一烟气进口与第一进气管路相连,第一进气管路用来提供工业烟气。氨加入口用来向脱硫反应器中加入氨水或者氨气或者液氨。碱加入口用来向脱硫反应器中加入碱液。碱液加入口上连接有碱供料装置。所述碱供料装置为碱液供料装置。碱液供料装置可以为碱液泵。第一烟气进口设置在反应塔的底部。第一烟气出口设置在反应塔的顶部。氨加入口、碱加入口设置在第一烟气进口和第一烟气出口之间靠下的位置。碱加入口的位置略高于氨加入口的位置。在其他实施例中,氨加入口和碱加入口的位置关系可以互换。The desulfurization reactor is provided with a first flue gas inlet, a first flue gas outlet, an ammonia inlet, and an alkali inlet. The first flue gas inlet is connected to a first intake pipe, and the first intake pipe is used to provide industrial flue gas. The ammonia inlet is used to add ammonia water or ammonia gas or liquid ammonia to the desulfurization reactor. The alkali adding port is used to add alkali liquid to the desulfurization reactor. An alkali feeding device is connected to the alkali liquid adding port. The alkali feeding device is an alkali liquid feeding device. The lye feeding device may be an lye pump. The first flue gas inlet is disposed at the bottom of the reaction tower. The first flue gas outlet is disposed on the top of the reaction tower. The ammonia inlet and the alkali inlet are arranged at a position lower between the first flue gas inlet and the first flue gas outlet. The position of the alkali inlet is slightly higher than that of the ammonia inlet. In other embodiments, the positional relationship between the ammonia inlet and the alkali inlet can be interchanged.
脱硝反应器上设置有第二烟气进口、第二烟气出口。第二烟气进口与脱硫反应器上的第一烟气出口相连。用以将脱硫反应器中反应后的烟气向脱硝反应器中通入。The denitration reactor is provided with a second flue gas inlet and a second flue gas outlet. The second flue gas inlet is connected to the first flue gas outlet on the desulfurization reactor. It is used to pass the flue gas after reaction in the desulfurization reactor to the denitration reactor.
本实施例的工业烟气处理系统还包括脱硫剂加料管路、第一进气管路及混合管路,混合管路的出料口与所述第一烟气进口相连,脱硫剂加料管路及第一进气管路均与混合管路的进料口相连。本实施例中,混合管路包括混合器和进气管道。混合器为静态混合器。静态混合气设置在进气管道中。进气管道与第一烟气进口相连接。在其他实施例中,混合管路仅包括进气管道,不设置混合器。在其他实施例中,也可以直接在脱硫反应器上设置第一烟气进口和脱硫剂加料口,第一烟气进口与第一进气管路连接,脱硫剂加料口与脱硫剂加料管路连接。The industrial flue gas treatment system of this embodiment further includes a desulfurizing agent feeding pipeline, a first inlet pipe, and a mixing pipeline. The outlet of the mixing pipeline is connected to the first flue gas inlet. The first air inlet lines are all connected to the inlet of the mixing line. In this embodiment, the mixing pipeline includes a mixer and an air intake duct. The mixer is a static mixer. The static mixture is set in the intake duct. The air inlet pipe is connected to the first flue gas inlet. In other embodiments, the mixing pipeline includes only the air inlet duct, and no mixer is provided. In other embodiments, a first flue gas inlet and a desulfurizing agent feeding port may also be provided directly on the desulfurization reactor. The first flue gas inlet is connected to the first intake pipe, and the desulfurizing agent feeding port is connected to the desulfurizing agent feeding pipe .
本实施例的工业烟气处理系统还包括烟气降温装置,用来对工业烟气进行降温。降温后的烟气再输入脱硫反应器。The industrial flue gas treatment system of this embodiment further includes a flue gas cooling device for cooling industrial flue gas. The cooled flue gas is then fed into the desulfurization reactor.
作为进一步的改进,烟气降温装置为换热装置。第二烟气出口可以连接排放装置,也可以与换热装置相连,作为低温烟气与高温烟气换热。排放装置包括引风机以及与引风机相连的烟囱。As a further improvement, the flue gas cooling device is a heat exchange device. The second flue gas outlet can be connected to a discharge device or can be connected to a heat exchange device to exchange low-temperature flue gas with high-temperature flue gas. The exhaust device includes an induced draft fan and a chimney connected to the induced draft fan.
作为进一步的改进,换热装置为换热器。所述换热器包括高温烟气进口、高温烟气出口、低温烟气进口、低温烟气出口。高温烟气进口与工业烟气提供装置相连,高温烟气出口与脱硫反应器的第一烟气进口相连。低温烟气进口与脱硝反应器的第二烟气出口相连。换热器可以为现有技术中的换热器,如换热锅炉等。排放装置除了可以与第二烟气出口相连,还可以 与换热器的低温烟气出口相连。As a further improvement, the heat exchange device is a heat exchanger. The heat exchanger includes a high-temperature flue gas inlet, a high-temperature flue gas outlet, a low-temperature flue gas inlet, and a low-temperature flue gas outlet. The high-temperature flue gas inlet is connected to the industrial flue gas supply device, and the high-temperature flue gas outlet is connected to the first flue gas inlet of the desulfurization reactor. The low temperature flue gas inlet is connected to the second flue gas outlet of the denitration reactor. The heat exchanger may be a heat exchanger in the prior art, such as a heat exchanger boiler. The exhaust device can be connected to the second flue gas outlet, and also to the low temperature flue gas outlet of the heat exchanger.
作为本实施例的工业烟气处理系统的改进,工业烟气处理系统还包括脱硫烟气除尘装置,所述烟气除尘装置包括第三烟气进口、第三烟气出口、尘料出口,第三烟气进口与第一烟气出口相连,第三烟气出口与第二烟气进口相连;脱硫反应器上还设置有尘料进口,所述尘料出口与脱硫反应器上的尘料进口相连。尘料出口也可以与脱硫烟气的混合管路相连。脱硫烟气除尘装置用来对脱硫反应器中出来的脱硫后的烟气进行除尘处理。As an improvement of the industrial flue gas treatment system of this embodiment, the industrial flue gas treatment system further includes a desulfurized flue gas dust removal device, and the flue gas dust removal device includes a third flue gas inlet, a third flue gas outlet, and a dust outlet. The three flue gas inlets are connected to the first flue gas outlet, and the third flue gas outlet is connected to the second flue gas inlet. A dust inlet is also provided on the desulfurization reactor, and the dust outlet is connected to the dust inlet on the desulfurization reactor. Connected. The dust outlet can also be connected to the mixing pipe of desulfurized flue gas. The desulfurization flue gas dust removal device is used to perform dust removal treatment on the desulfurized flue gas coming out of the desulfurization reactor.
除尘装置的作用在于将烟气进行气固分离。一般的,除尘装置包括除尘器。除尘器可以为旋风除尘器。除尘器将脱硫后的脱硫烟气中的固体颗粒收集后回收利用。在其他实施例中,除尘器也可以采取现有技术中的其他除尘器,如布袋除尘器、电除尘器。The role of the dust removal device is to separate the gas from the solid. Generally, the dust removal device includes a dust collector. The dust collector may be a cyclone dust collector. The dust collector collects the solid particles in the desulfurized flue gas after desulfurization and recycles them. In other embodiments, the dust collector may also adopt other dust collectors in the prior art, such as a bag dust collector and an electric dust collector.
作为进一步的改进,除尘器的尘料出口上连接有循环箱。循环箱上设置有进料口和出料口。循环箱的进料口与除尘装置的尘料出口相连,循环箱的出料口与脱硫反应器的尘料进口相连。循环箱主要作为除尘装置中除尘得到的固体的储存装置,并将除尘得到的固体向脱硫反应器中输送以实现循环利用。As a further improvement, a circulation box is connected to the dust outlet of the dust collector. The circulation box is provided with a feeding port and a discharging port. The inlet of the circulation box is connected to the dust outlet of the dust removal device, and the outlet of the circulation box is connected to the dust inlet of the desulfurization reactor. The circulation box is mainly used as a storage device for the solids obtained by the dust removal in the dust removal device, and conveys the solids obtained by the dust removal to the desulfurization reactor to realize recycling.
作为本实施例的工业烟气处理系统的改进,脱硫反应器内部与碱加入口相连有碱液喷料装置。氨加入口上连接有氨供料装置。氨供料装置为氨水供料装置。脱硫反应器内部与氨加入口相连有氨水喷料装置。As an improvement of the industrial flue gas treatment system of this embodiment, an alkali liquid spraying device is connected to the alkali inlet of the desulfurization reactor. An ammonia feed device is connected to the ammonia inlet. The ammonia supply device is an ammonia water supply device. An ammonia water spraying device is connected to the ammonia inlet of the desulfurization reactor.
作为本实施例的工业烟气处理系统的改进,氨加入口可以设置在混合器或者第一进气管路上。As an improvement of the industrial flue gas treatment system of this embodiment, the ammonia inlet can be provided on the mixer or the first intake pipe.
脱硝反应器上还设置有空气加入口。具体的,空气加入口包括设置在碱液喷料装置和/或氨水喷料装置上的空气喷射入口。An air inlet is also provided on the denitration reactor. Specifically, the air inlet includes an air injection inlet provided on the lye spraying device and / or the ammonia spraying device.
作为本实施例的工业烟气处理系统的改进,脱硫反应器内设置有供烟气通过的文丘里结构。As an improvement of the industrial flue gas treatment system of this embodiment, a venturi structure is provided in the desulfurization reactor for the passage of flue gas.
作为本实施例的工业烟气处理系统的改进,工业烟气处理系统还包括用来向脱硝反应器中加入脱硫剂的脱硫剂补料管路。脱硫剂补料管路可以直接与脱硝反应器相连,即直接在脱硝反应器设置脱硫剂补料口,将脱硝剂补料管路与补料口相连即可。也可以通过以下方式相连:脱硝反应器的第二烟气进口上连接有脱硝混合进气管道,脱硝混合进气管道上连接有混合器。混合器上连接有第二进气管路和脱硫补料管路。As an improvement of the industrial flue gas treatment system of this embodiment, the industrial flue gas treatment system further includes a desulfurizing agent feed line for adding a desulfurizing agent to the denitration reactor. The desulfurization agent feeding pipeline can be directly connected to the denitration reactor, that is, a desulfurization agent feeding port is directly provided in the denitration reactor, and the denitration agent feeding pipeline can be connected to the feeding port. It can also be connected in the following way: a denitration mixing inlet pipe is connected to the second flue gas inlet of the denitration reactor, and a mixer is connected to the denitration mixing inlet pipe. The mixer is connected with a second inlet pipe and a desulfurization feed pipe.
作为本实施例的工业烟气处理系统的改进,脱硝反应器上连接有集尘器。集尘器与脱硫反应器相连,以将集尘器收集到的固体返回脱硫反应器循环利用。As an improvement of the industrial flue gas treatment system of this embodiment, a dust collector is connected to the denitration reactor. The dust collector is connected to the desulfurization reactor to return the solid collected by the dust collector to the desulfurization reactor for recycling.
作为本实施例的工业烟气处理系统的改进,陶瓷过滤器包括多个过滤器模组,过滤器模 组的数量根据所要处理的烟气量的大小来设计。每一个过滤器模组包括圆筒形模组本体以及设置在模组本体下端的圆锥形底部。每一个过滤器模组的轴线沿竖直方向设置。多个模组的排列方式为竖向并列排布。具体的,可采取单排或者平行多排的方式进行排列。As an improvement of the industrial flue gas treatment system of this embodiment, the ceramic filter includes a plurality of filter modules, and the number of filter modules is designed according to the amount of flue gas to be processed. Each filter module includes a cylindrical module body and a conical bottom provided at the lower end of the module body. The axis of each filter module is arranged in a vertical direction. The arrangement of multiple modules is arranged side by side vertically. Specifically, the arrangement may be performed in a single row or in parallel multiple rows.
陶瓷过滤器包括进气变径分路风管和出气变径风管。进气变径分路风管包括烟气总进口和烟气分出口。烟气总进口与陶瓷过滤器的第二烟气进口相连。每个过滤器模组包括模组进气口和模组出气口。烟气分出口分别与每一个过滤器模组的模组进气口相连。The ceramic filter includes an inlet reducing diameter branch air duct and an outlet reducing diameter air duct. The intake reducing shunt air duct includes a total gas inlet and a gas outlet. The total flue gas inlet is connected to the second flue gas inlet of the ceramic filter. Each filter module includes a module air inlet and a module air outlet. The smoke gas outlet is connected to the module air inlet of each filter module separately.
每个模组包括模组箱体,箱体上设置有模组进气口和模组出气口。模组进气口和模组出气口均设置有调节闸板,用以调节烟气的流量或者将该模组封闭。模组内装配有一定数量的陶瓷催化滤管。陶瓷催化滤管是由陶瓷纤维经高温高压一体成型制成。陶瓷催化滤管的底端封闭,上端带有法兰。Each module includes a module box, and the box is provided with a module air inlet and a module air outlet. The module air inlet and the module air outlet are both provided with an adjustment shutter for adjusting the flow of the flue gas or closing the module. A certain number of ceramic catalytic filters are assembled in the module. Ceramic catalytic filter tube is made of ceramic fiber through high temperature and high pressure. The bottom end of the ceramic catalytic filter tube is closed, and the upper end is provided with a flange.
陶瓷催化滤管的管壁上嵌入有脱硝催化剂,从而使该陶瓷催化滤管在过滤烟气中的颗粒物的同时还具有脱硝功能。A denitration catalyst is embedded in the tube wall of the ceramic catalytic filter tube, so that the ceramic catalytic filter tube also has a denitration function while filtering the particulate matter in the flue gas.
每个过滤器模组的箱体内位于陶瓷催化滤管的上方设置有净气室,净气室与模组箱体上的出气口相连。出气变径风管包括烟气分进口和烟气总出口。每个模组的出气口上连接烟气分进口。烟气总出口与脱硝反应器的第二烟气出口相连。A clean air chamber is arranged above the ceramic catalytic filter tube in the box body of each filter module, and the clean air chamber is connected to the air outlet on the module box. The outlet gas reducing duct includes a flue gas sub-inlet and a flue gas main outlet. The gas outlet of each module is connected to the gas inlet. The total flue gas outlet is connected to the second flue gas outlet of the denitration reactor.
每个过滤器模组的箱体内部位于陶瓷催化过滤管的上方还设置有空气清扫系统。用以通入压缩空气对陶瓷滤管内进行喷吹清扫。An air cleaning system is also provided inside the box body of each filter module above the ceramic catalytic filter tube. It is used to blow compressed air into the ceramic filter tube through compressed air.
烟气在穿过陶瓷催化滤管的管壁时,固体颗粒物被阻挡下来,在滤管内外压力差的作用下形成尘饼层留置在滤管表面。由于颗粒物中含有仍具脱硫活性的脱硫剂粉末,该尘饼层作为脱硫反应床层可以进一步增加脱硫反应的效率,同时还可以进一步过滤烟气中的颗粒物。携带有氮氧化物和氨的烟气在通过滤管管体的陶瓷纤维层时在脱硝催化剂的催化作用下发生脱硝反应。When the flue gas passes through the wall of the ceramic catalytic filter tube, the solid particles are blocked, and a dust cake layer is formed on the surface of the filter tube under the pressure difference between the inside and the outside of the filter tube. Because the particles contain desulfurizing agent powder that still has desulfurizing activity, the dust cake layer as a desulfurization reaction bed can further increase the efficiency of the desulfurization reaction, and at the same time, it can further filter the particulate matter in the flue gas. The flue gas carrying nitrogen oxides and ammonia passes through the ceramic fiber layer of the filter tube body and undergoes a denitration reaction under the catalysis of a denitration catalyst.
在陶瓷催化滤管的作用下,经过进一步脱硫、除尘、脱硝后的烟气进入陶瓷过滤器模组上方的净气室,通过出气变径风管汇合进入烟气主管道并经第二烟气出口输出。Under the action of the ceramic catalytic filter tube, the flue gas after further desulfurization, dust removal and denitration enters the clean air chamber above the ceramic filter module, merges into the flue gas main pipe through the outlet gas reducing duct and passes through the second flue gas Exit output.
陶瓷催化滤管表面的尘饼层由空气清扫系统定期喷吹清扫,落入陶瓷过滤器模组下方的圆锥形底部中被输灰系统带走后输入废灰仓。The dust cake layer on the surface of the ceramic catalytic filter tube is periodically sprayed and cleaned by the air cleaning system, falls into the conical bottom of the ceramic filter module, and is taken away by the ash conveying system and then input into the waste ash bin.
陶瓷催化过滤器的模组化设计,一方面可以实现不停机检修,如果某个模组出现故障时,可以关闭该模组的进出口闸板,隔离烟气降温后进入检修,检修期间其他模组仍然可以正常运行,整体系统不需要停机;另一方面是给系统扩容提供可能性。The modular design of ceramic catalytic filter can realize non-stop maintenance on the one hand. If a module fails, the inlet and outlet shutters of the module can be closed to isolate the flue gas from cooling and enter the maintenance. The group can still operate normally, and the entire system does not need to be down; on the other hand, it provides the possibility for system expansion.
下面提供本发明的工业烟气处理系统的优选实施例:The following provides preferred embodiments of the industrial flue gas treatment system of the present invention:
实施例2Example 2
本实施例的工业烟气处理系统如图1所示,包括脱硫反应器1、脱硝反应器2。脱硫反应器为半干法脱硫反应塔。半干法脱硫反应塔包括圆筒形塔体以及设置在圆筒形塔体底部的圆锥形收集器。脱硝反应器为陶瓷过滤器。The industrial flue gas treatment system of this embodiment is shown in FIG. 1 and includes a desulfurization reactor 1 and a denitration reactor 2. The desulfurization reactor is a semi-dry desulfurization reaction tower. The semi-dry desulfurization reaction tower includes a cylindrical tower body and a conical collector arranged at the bottom of the cylindrical tower body. The denitration reactor is a ceramic filter.
脱硫反应器上设置有第一烟气进口11、第一烟气出口12、氨加入口、碱加入口。第一烟气进口用来向脱硫反应器中输送待处理的高温烟气。第一烟气出口用来将脱硫反应器中处理过的烟气输出。工业烟气处理系统还包括第一进气管路,用来提供工业烟气。第一烟气进口与第一进气管路相连。The desulfurization reactor is provided with a first flue gas inlet 11, a first flue gas outlet 12, an ammonia inlet and an alkali inlet. The first flue gas inlet is used to convey the high-temperature flue gas to be processed into the desulfurization reactor. The first flue gas outlet is used to output the treated flue gas in the desulfurization reactor. The industrial flue gas treatment system further includes a first air inlet pipe for providing industrial flue gas. The first flue gas inlet is connected to the first intake pipe.
第一烟气进口11设置在反应塔的底部。第一烟气出口12设置在反应塔的顶部。氨加入口、碱加入口设置在第一烟气进口和第一烟气出口之间靠下的位置。碱加入口的位置略高于氨加入口的位置。The first flue gas inlet 11 is provided at the bottom of the reaction tower. The first flue gas outlet 12 is provided at the top of the reaction tower. The ammonia inlet and the alkali inlet are arranged at a position lower between the first flue gas inlet and the first flue gas outlet. The position of the alkali inlet is slightly higher than that of the ammonia inlet.
脱硫反应器上设置有碱液喷料装置13、氨水喷料装置14。碱液喷料装置13和氨水喷料装置14上设置空气喷射入口15,以向碱液喷料装置13和氨水喷料装置14上通入压缩空气,促使碱液或者氨水雾化。碱液喷料装置13包括环形碱液喷液管以及均匀间隔设置在环形碱液喷液管上的碱液喷头。碱液喷头构成了上述碱加入口。碱液喷头的喷口沿径向朝向反应塔的内部中心。环形碱液喷液管固定设置在反应塔的外壁上,环形碱液喷液管上均匀间隔设置有碱液喷液支管,碱液喷液支管沿反应塔的径向延伸。碱液喷液支管远离环形碱液喷液管的一端穿过反应塔塔体并伸入反应塔内部。伸入反应塔的碱液喷液支管的一端设置上述碱液喷头。The desulfurization reactor is provided with an alkali liquid spraying device 13 and an ammonia water spraying device 14. An air spray inlet 15 is provided on the lye spraying device 13 and the ammonia water spraying device 14 to pass compressed air to the lye spray device 13 and the ammonia water spraying device 14 to promote atomization of the lye or ammonia water. The lye spraying device 13 includes an annular lye spraying pipe and an lye spraying head arranged on the annular lye spraying pipe at regular intervals. The lye spray head constitutes the above-mentioned alkali adding port. The nozzle of the lye spray head faces the inner center of the reaction tower in a radial direction. The annular lye spraying pipe is fixedly disposed on the outer wall of the reaction tower. The annular lye spraying pipe is provided with lye spraying branch pipes at regular intervals, and the lye spraying branch pipe extends in the radial direction of the reaction tower. The end of the lye spraying branch pipe far from the annular lye spraying pipe passes through the reaction tower body and extends into the reaction tower. The above-mentioned lye spray head is set at one end of the lye spray liquid branch pipe protruding into the reaction tower.
环形碱液喷液管上连接有碱供料装置。碱供料装置为碱液供料装置。碱液供料装置包括碱罐以及与碱罐相连的碱供给泵,碱供给泵与碱加入口之间连接有碱液供给管道。碱罐包括浓碱罐131和稀碱罐132。浓碱罐131上连接有浓碱泵,浓碱泵通过管道与稀碱罐132相连,用来向稀碱罐132中供给浓碱。稀碱罐上连接有稀碱泵,稀碱泵通过管道与脱硫反应器的碱加入口相连。稀碱泵上还连接有供水装置,以稀释浓碱。An alkali feeding device is connected to the annular alkali liquid spraying pipe. The alkali feeding device is an alkali liquid feeding device. The lye supply device includes an alkali tank and an alkali supply pump connected to the alkali tank, and an alkali supply pipe is connected between the alkali supply pump and the alkali adding port. The alkali tank includes a concentrated alkali tank 131 and a dilute alkali tank 132. A concentrated alkali pump is connected to the concentrated alkali tank 131, and the concentrated alkali pump is connected to the diluted alkali tank 132 through a pipeline, and is used to supply the concentrated alkali to the diluted alkali tank 132. A dilute alkali pump is connected to the dilute alkali tank, and the dilute alkali pump is connected to the alkali adding port of the desulfurization reactor through a pipeline. A water supply device is also connected to the dilute alkali pump to dilute the concentrated alkali.
氨水喷料装置14与上述碱液喷料装置的结构类似。包括环形氨水喷液管以及均匀间隔设置在环形氨水喷液管上的氨水喷头。氨水喷头构成了上述氨加入口。氨水喷头的喷口沿径向朝向反应塔的内部中心。环形氨水喷液管固定设置在反应塔的外壁上,环形氨水喷液管上均匀间隔设置有氨水喷液支管,氨水喷液支管沿反应塔的径向延伸。氨水喷液支管远离环形氨水喷液管的一端穿过反应塔塔体并伸入反应塔内部。伸入反应塔的氨水喷液支管的一端设置上述氨水喷头。The structure of the ammonia water spraying device 14 is similar to that of the alkali liquid spraying device described above. The utility model comprises an annular ammonia water spraying pipe and an ammonia water spraying head arranged on the annular ammonia water spraying pipe at regular intervals. The ammonia water spray head constitutes the above-mentioned ammonia inlet. The nozzle of the ammonia water spray nozzle faces the inner center of the reaction tower in a radial direction. The annular ammonia water spraying pipe is fixedly arranged on the outer wall of the reaction tower. The annular ammonia water spraying pipe is provided with ammonia water spraying branch pipes evenly spaced. The ammonia water spraying branch pipe extends along the radial direction of the reaction tower. The end of the ammonia water spraying branch pipe far from the annular ammonia water spraying pipe passes through the reaction tower body and extends into the inside of the reaction tower. The one end of the ammonia water spray branch pipe protruding into the reaction tower is provided with the above ammonia water spray head.
环形氨水喷液管上连接有氨水提供装置。氨水提供装置包括氨水储存罐141,氨水储存 罐上连接有氨水供给泵,氨水供给泵与氨加入口之间连接有氨水管道。An ammonia water supply device is connected to the annular ammonia water spray pipe. The ammonia water supply device includes an ammonia water storage tank 141, an ammonia water supply pump is connected to the ammonia water storage tank, and an ammonia water pipe is connected between the ammonia water supply pump and the ammonia inlet.
脱硫反应器内设置有供烟气通过的文丘里结构。文丘里结构设置在反应塔内的底部。文丘里结构沿反应塔轴向延伸,在文丘里结构的下端烟气通道的内径较大,并逐渐缩小,随后又逐渐增大。内径缩小的文丘里段的通道能够增加烟气上升的线性速度,使烟气中携带的脱硫剂粉末及固体颗粒物在反应塔中形成流化床,大大增加了烟气中酸性物质与脱硫剂的接触。A venturi structure is provided in the desulfurization reactor for the flue gas to pass through. The Venturi structure is located at the bottom of the reaction tower. The venturi structure extends along the axial direction of the reaction tower, and the inner diameter of the flue gas channel at the lower end of the venturi structure is larger, and gradually decreases, and then gradually increases. The passage of the venturi section with a reduced inner diameter can increase the linear velocity of the flue gas rise, so that the desulfurizer powder and solid particles carried in the flue gas form a fluidized bed in the reaction tower, which greatly increases the contact.
工业烟气处理系统还包括脱硫剂加料管路3、第一进气管路4及混合管路5。混合管路5的出料口与第一烟气进口11相连。脱硫剂加料管路3及第一进气管路4均与混合管路5的进料口相连。混合管路5包括混合器和进气管道。混合器为静态混合器。静态混合器设置在进气管道中。进气管道与第一烟气进口相连接。脱硫剂加料管路包括脱硫剂仓31、循环脱硫剂仓32以及与脱硫剂仓和循环脱硫剂仓的出口均相连的脱硫剂加料管。脱硫剂加料管与混合管路相连。脱硫剂仓和循环脱硫剂仓与脱硫剂加料管连接处均设置有阀门,以控制二者同时与脱硫剂加料管相连或者仅其中一个与脱硫剂加料管相连。The industrial flue gas treatment system further includes a desulfurizing agent feeding pipeline 3, a first intake pipeline 4 and a mixing pipeline 5. The outlet of the mixing pipe 5 is connected to the first flue gas inlet 11. The desulfurizing agent feeding pipeline 3 and the first air inlet pipeline 4 are both connected to the feeding inlet of the mixing pipeline 5. The mixing line 5 includes a mixer and an intake duct. The mixer is a static mixer. A static mixer is provided in the intake duct. The air inlet pipe is connected to the first flue gas inlet. The desulfurizing agent feeding pipeline includes a desulfurizing agent tank 31, a circulating desulfurizing agent tank 32, and a desulfurizing agent feeding pipe connected to the outlets of the desulfurizing agent tank and the circulating desulfurizing agent tank. The desulfurizing agent feeding pipe is connected with the mixing pipe. Valves are provided at the connections between the desulfurizing agent silo and the circulating desulfurizing agent silo and the desulfurizing agent feed pipe to control both of them being connected to the desulfurizing agent feed pipe or only one of them is connected to the desulfurizing agent feed pipe.
工业烟气处理系统还包括脱硫烟气除尘装置,脱硫烟气除尘装置用来对脱硫反应器中出来的脱硫后的烟气进行除尘处理。脱硫烟气除尘装置包括第三烟气进口61、第三烟气出口62、尘料出口63。第三烟气进口61与脱硫反应塔的第一烟气出口12相连,第三烟气出口62与脱硝反应器的第二烟气进口相连。脱硫反应器上还设置有尘料进口16,脱硫烟气除尘装置的尘料出口63与脱硫反应器上的尘料进口16相连。The industrial flue gas treatment system also includes a desulfurized flue gas dust removal device, which is used for dust removal treatment of the desulfurized flue gas coming out of the desulfurization reactor. The desulfurization flue gas dust removal device includes a third flue gas inlet 61, a third flue gas outlet 62, and a dust material outlet 63. The third flue gas inlet 61 is connected to the first flue gas outlet 12 of the desulfurization reaction tower, and the third flue gas outlet 62 is connected to the second flue gas inlet of the denitration reactor. The desulfurization reactor is also provided with a dust inlet 16, and the dust outlet 63 of the desulfurization flue gas dust removal device is connected to the dust inlet 16 on the desulfurization reactor.
除尘装置包括旋风除尘器。旋风除尘器上设置有上述第三烟气进口、第三烟气出口和尘料出口。除尘器的尘料出口上连接有循环箱64。循环箱64上设置有进料口和出料口。循环箱64的进料口与除尘器的尘料出口63相连,循环箱的出料口与脱硫反应器的尘料进口16相连。循环箱主要作为除尘装置中除尘得到的固体的储存装置,并将除尘得到的固体向脱硫反应器中输送以实现循环利用。循环箱64包括箱体,箱体上设置有上述进料口和出料口。箱体内部设置有两个变频螺旋输送机,分别为上螺旋输送机和下螺旋输送机。上螺旋输送机设置在箱体内部靠上的位置,用以将箱体内尘料聚集过多时,将尘料从循环箱内排出。下螺旋输送机的出料口与脱硫反应器的尘料进口16相连,用以将循环箱内的尘料输送至反应塔中。The dust removal device includes a cyclone dust collector. The cyclone dust collector is provided with the above-mentioned third flue gas inlet, third flue gas outlet, and dust material outlet. A circulation box 64 is connected to the dust outlet of the dust collector. The circulation box 64 is provided with a feeding port and a discharging port. The inlet of the circulation box 64 is connected to the dust outlet 63 of the dust collector, and the outlet of the circulation box is connected to the dust inlet 16 of the desulfurization reactor. The circulation box is mainly used as a storage device for the solids obtained by the dust removal in the dust removal device, and conveys the solids obtained by the dust removal to the desulfurization reactor to realize recycling. The circulation box 64 includes a box body, and the box body is provided with the above-mentioned inlet and outlet. There are two variable frequency screw conveyors inside the box, which are the upper screw conveyor and the lower screw conveyor. The upper screw conveyor is arranged on the upper part of the box body, and is used to discharge the dust material from the circulation box when the dust material in the box is accumulated too much. The outlet of the lower screw conveyor is connected to the dust inlet 16 of the desulfurization reactor, and is used to convey the dust in the circulation box to the reaction tower.
反应塔下端的圆锥形收集器与混合管路5相连,用以将收集到的烟尘输送回混合管路,并进入脱硫反应塔中继续循环利用。The conical collector at the lower end of the reaction tower is connected to the mixing pipe 5 for conveying the collected soot back to the mixing pipe and entering the desulfurization reaction tower to continue recycling.
脱硝反应器2上设置有第二烟气进口21、第二烟气出口22。第二烟气进口21与脱硫反应器1上的第一烟气出口12相连。用以将脱硫反应器1中反应后的烟气向脱硝反应器2中通入。The denitration reactor 2 is provided with a second flue gas inlet 21 and a second flue gas outlet 22. The second flue gas inlet 21 is connected to the first flue gas outlet 12 on the desulfurization reactor 1. It is used to pass the reacted flue gas in the desulfurization reactor 1 into the denitration reactor 2.
工业烟气处理系统还包括用来向脱硝反应器中加入脱硫剂的脱硫剂补料管路。脱硝反应器的第二烟气进口上连接有脱硝混合进气管道,脱硝混合进气管道上连接有混合器。混合器上连接有第二进气管路和脱硫剂补料管路。The industrial flue gas treatment system also includes a desulfurization agent feed line for adding a desulfurization agent to the denitration reactor. A denitration mixing inlet pipe is connected to the second flue gas inlet of the denitration reactor, and a mixer is connected to the denitration mixing inlet pipe. The mixer is connected with a second inlet pipe and a desulfurizing agent feed pipe.
脱硝反应器2上连接有集尘器23。集尘器23与脱硫反应器1相连,以将集尘器23收集到的固体返回脱硫反应器循环利用。A dust collector 23 is connected to the denitration reactor 2. The dust collector 23 is connected to the desulfurization reactor 1 to return the solid collected by the dust collector 23 to the desulfurization reactor for recycling.
工业烟气处理系统还包括烟气降温装置7,用来对工业烟气进行降温。降温后的烟气再输入脱硫反应器。烟气降温装置7为换热装置。第二烟气出口与换热装置相连,作为低温烟气与高温烟气换热。换热装置为换热器。换热器包括高温烟气进口、高温烟气出口、低温烟气进口、低温烟气出口。高温烟气进口与工业烟气提供装置相连,高温烟气出口与脱硫反应器的第一烟气进口相连。低温烟气进口与脱硝反应器的第二烟气出口相连。换热器为换热锅炉等。低温烟气出口上连接有引风机8。引风机上连接有排放烟囱9。The industrial flue gas treatment system further includes a flue gas cooling device 7 for cooling industrial flue gas. The cooled flue gas is then fed into the desulfurization reactor. The flue gas temperature reducing device 7 is a heat exchange device. The second flue gas outlet is connected to the heat exchange device, and serves as heat exchange between the low temperature flue gas and the high temperature flue gas. The heat exchange device is a heat exchanger. The heat exchanger includes high temperature flue gas inlet, high temperature flue gas outlet, low temperature flue gas inlet, and low temperature flue gas outlet. The high-temperature flue gas inlet is connected to the industrial flue gas supply device, and the high-temperature flue gas outlet is connected to the first flue gas inlet of the desulfurization reactor. The low temperature flue gas inlet is connected to the second flue gas outlet of the denitration reactor. The heat exchanger is a heat exchange boiler. An induced draft fan 8 is connected to the low-temperature flue gas outlet. A discharge chimney 9 is connected to the induced draft fan.
陶瓷过滤器包括多个过滤器模组,每一个过滤器模组包括圆筒形模组本体以及设置在模组本体下端的圆锥形底部。每一个过滤器模组的轴线沿竖直方向设置。本实施例中过滤器模组的数量为10个。采取单排竖向并列排布的方式排列。The ceramic filter includes a plurality of filter modules, and each filter module includes a cylindrical module body and a conical bottom provided at the lower end of the module body. The axis of each filter module is arranged in a vertical direction. The number of filter modules in this embodiment is ten. Arranged in a single vertical row.
陶瓷过滤器包括进气变径分路风管和出气变径风管。进气变径分路风管包括烟气总进口和烟气分出口。烟气总进口与陶瓷过滤器的第二烟气进口相连。每个过滤器模组包括模组进气口和模组出气口。烟气分出口分别与每一个过滤器模组的模组进气口相连。The ceramic filter includes an inlet reducing diameter branch air duct and an outlet reducing diameter air duct. The intake reducing shunt air duct includes a total gas inlet and a gas outlet. The total flue gas inlet is connected to the second flue gas inlet of the ceramic filter. Each filter module includes a module air inlet and a module air outlet. The smoke gas outlet is connected to the module air inlet of each filter module separately.
每个模组包括模组箱体,箱体上设置有模组进气口和模组出气口。模组进气口和模组出气口均设置有调节闸板。模组内装配有多根的陶瓷催化滤管。陶瓷催化滤管是由陶瓷纤维经高温高压一体成型制成。陶瓷催化滤管的底端封闭,上端带有法兰。陶瓷催化滤管的管壁上嵌入有脱硝催化剂,从而使该陶瓷催化滤管在过滤烟气中的颗粒物的同时还具有脱硝功能。Each module includes a module box, and the box is provided with a module air inlet and a module air outlet. The module air inlet and the module air outlet are both provided with an adjusting shutter. The module is equipped with multiple ceramic catalytic filter tubes. Ceramic catalytic filter tube is made of ceramic fiber through high temperature and high pressure. The bottom end of the ceramic catalytic filter tube is closed, and the upper end is provided with a flange. A denitration catalyst is embedded in the tube wall of the ceramic catalytic filter tube, so that the ceramic catalytic filter tube also has a denitration function while filtering the particulate matter in the flue gas.
每个过滤器模组的箱体内位于陶瓷催化滤管的上方设置有净气室,净气室与模组箱体上的出气口相连。出气变径风管包括烟气分进口和烟气总出口。每个模组的出气口上连接烟气分进口。烟气总出口与脱硝反应器的第二烟气出口相连。A clean air chamber is arranged above the ceramic catalytic filter tube in the box body of each filter module, and the clean air chamber is connected to the air outlet on the module box. The outlet gas reducing duct includes a flue gas sub-inlet and a flue gas main outlet. The gas outlet of each module is connected to the gas inlet. The total flue gas outlet is connected to the second flue gas outlet of the denitration reactor.
每个过滤器模组的箱体内部位于陶瓷催化过滤管的上方还设置有空气清扫系统。An air cleaning system is also provided inside the box body of each filter module above the ceramic catalytic filter tube.

Claims (10)

  1. 一种工业烟气处理方法,其特征在于,包括如下步骤:An industrial flue gas treatment method is characterized in that it includes the following steps:
    1)将工业烟气、脱硫剂、氨混合后进行脱硫处理,得到脱硫烟气;1) Mix industrial flue gas, desulfurizing agent, and ammonia to perform desulfurization treatment to obtain desulfurized flue gas;
    2)然后将步骤1)得到的脱硫烟气进行脱硝处理,即得。2) Then, the desulfurized flue gas obtained in step 1) is subjected to a denitration treatment to obtain it.
  2. 根据权利要求1所述的工业烟气处理方法,其特征在于:所述脱硫剂为石灰、碳酸氢钠、碳酸氢钾、氢氧化钠、氢氧化钾中的一种或者几种。The industrial flue gas treatment method according to claim 1, wherein the desulfurizing agent is one or more of lime, sodium bicarbonate, potassium bicarbonate, sodium hydroxide, and potassium hydroxide.
  3. 根据权利要求1所述的工业烟气处理方法,其特征在于:所述氨是氨气、液氨、氨水、尿素中的一种。The industrial flue gas treatment method according to claim 1, wherein the ammonia is one of ammonia gas, liquid ammonia, ammonia water, and urea.
  4. 根据权利要求1所述的工业烟气处理方法,其特征在于:所述工业烟气、脱硫剂、氨混合是先将工业烟气与脱硫剂混合,然后再与氨混合;或者是先将工业烟气与氨混合,然后再与脱硫剂混合;或者是将工业烟气与脱硫剂和氨同时混合。The industrial flue gas treatment method according to claim 1, characterized in that: the industrial flue gas, desulfurizing agent, and ammonia are mixed by first mixing industrial flue gas with the desulfurizing agent, and then with ammonia; or The flue gas is mixed with ammonia and then mixed with the desulfurizing agent; or the industrial flue gas is mixed with the desulfurizing agent and ammonia at the same time.
  5. 根据权利要求1-4任意一项所述的工业烟气处理方法,其特征在于:步骤1)中得到的脱硫烟气进行气固分离,分离得到的固体作为步骤1)中的脱硫剂与工业烟气、氨混合进行脱硫处理。The industrial flue gas treatment method according to any one of claims 1 to 4, characterized in that the desulfurized flue gas obtained in step 1) is subjected to gas-solid separation, and the separated solid is used as the desulfurizing agent in step 1) and industrial Flue gas and ammonia are mixed for desulfurization.
  6. 根据权利要求1-4任意一项所述的工业烟气处理方法,其特征在于:步骤2)中进行脱硝处理后的烟气进行气固分离,得到的固体作为步骤1)中的脱硫剂与工业烟气、氨混合进行脱硫处理。The industrial flue gas treatment method according to any one of claims 1-4, characterized in that the flue gas after the denitration treatment in step 2) is subjected to gas-solid separation, and the obtained solid is used as the desulfurizing agent in step 1) and Industrial flue gas and ammonia are mixed for desulfurization.
  7. 一种工业烟气处理系统,包括脱硫反应器、脱硝反应器;所述脱硫反应器上设置有第一烟气进口、第一烟气出口;所述脱硝反应器上设置有第二烟气进口、第二烟气出口;所述第二烟气进口与第一烟气出口相连通,其特征在于,所述脱硫反应器上还设置有氨加入口。An industrial flue gas treatment system includes a desulfurization reactor and a denitration reactor; the desulfurization reactor is provided with a first flue gas inlet and a first flue gas outlet; and the denitration reactor is provided with a second flue gas inlet And a second flue gas outlet; the second flue gas inlet is in communication with the first flue gas outlet, and is characterized in that the desulfurization reactor is further provided with an ammonia adding port.
  8. 根据权利要求7所述的工业烟气处理系统,其特征在于,所述工业烟气处理系统还包括脱硫剂加料管路、第一进气管路及混合管路,所述混合管路的出料口与所述第一烟气进口相连,所述脱硫剂加料管路及第一进气管路均与混合管路的进料口相连,第一进气管路用于向混合管路输入工业烟气。The industrial flue gas treatment system according to claim 7, characterized in that the industrial flue gas treatment system further comprises a desulfurizing agent feeding pipeline, a first inlet pipeline and a mixing pipeline, and the output of the mixing pipeline The inlet is connected to the first flue gas inlet, and the desulfurizing agent feeding pipe and the first air inlet pipe are both connected to the inlet of the mixing pipe. The first air inlet pipe is used to input industrial flue gas to the mixing pipe. .
  9. 根据权利要求7所述的工业烟气处理系统,其特征在于,所述脱硝反应器包括集尘器,集尘器与脱硫反应器相连。The industrial flue gas treatment system according to claim 7, wherein the denitration reactor comprises a dust collector, and the dust collector is connected to the desulfurization reactor.
  10. 根据权利要求7-9任意一项所述的工业烟气处理系统,其特征在于,脱硝反应器为陶瓷过滤器。The industrial flue gas treatment system according to any one of claims 7 to 9, wherein the denitration reactor is a ceramic filter.
PCT/CN2019/095355 2018-05-31 2019-07-10 Industrial flue gas treatment method and industrial flue gas treatment system WO2019228547A1 (en)

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