烟气脱硝技术特点：SCR脱硝技术具有脱硝效率、适应当前环保要求等优点，受到电力行业的高度重视和广泛应用。在环保要求严格的发达国家，如德国、日本、美国、加拿大、荷兰、奥地利、瑞典、丹麦等国家，SCR脱硝技术已成为应用更广泛、更成熟的技术之一。

Characteristics of flue gas denitration technology: SCR denitration technology has the advantages of denitrification efficiency and meets the current environmental protection requirements, and has been highly valued and widely used by the power industry. SCR denitration technology has become one of the most widely used and mature technologies in developed countries with strict environmental protection requirements, such as Germany, Japan, the United States, Canada, the Netherlands, Austria, Sweden, Denmark and other countries.

经过脱硝反应后再通过SCR反应器出口烟道回到空气预热器, 典型布置如图2所示。典型高尘布置设计方式, 在SCR反应器入口和出口烟道均需设计排灰斗(特别是对于高粉尘烟气), 这样, 不但可以有效减小催化剂的磨损, 而且可以有效减轻空气预热器的堵塞和磨损, 同时也可以减少脱硝还原剂的消耗量,保证系统安全、稳定运行。

After denitrification, the flue at the outlet of SCR reactor is returned to the air preheater. The typical arrangement is shown in Fig. 2. The typical design mode of high dust arrangement requires the design of ash discharge hopper (especially for high dust flue gas) at the inlet and outlet flue of SCR reactor. In this way, not only the catalyst wear can be effectively reduced, but also the blockage and wear of air preheater can be effectively reduced, and the consumption of denitration reducing agent can be reduced, and the system can be safely and stably operated.

脱硝系统调试，脱硝系统调试是保证系统运行的稳定性、可靠性以及能否达到设计性能保证值更重要的工作之一。

The commissioning of denitration system is one of the most important tasks to ensure the stability, reliability and the design performance of the system.

催化剂砷中毒后，氨不易吸附到中毒的催化剂活性点上，从而导致催化剂活性的降低。在使用过程中可使催化剂表面对砷不具有活性

After arsenic poisoning, ammonia is not easily adsorbed to the active point of the catalyst, which leads to the decrease of catalyst activity. The catalyst surface can be inactive to arsenic during the use,

脱硝烟道灰斗，SCR法烟气脱硝装置的布置方式根据反应器布置位置的不同, 通常可分为高尘布置与低尘布置。高尘布置的SCR反应器通常布置在锅炉省煤器与空气预热器之间, 受布置空间所限, SCR反应器不能直接布置在锅炉省煤器下(立式锅炉除外),而是烟气通过水平烟道引出后再通过上升烟道连接SCR反应器,

The arrangement of ash hopper and SCR Flue gas denitration device can be divided into high dust arrangement and low dust arrangement according to the different arrangement position of reactor. SCR reactors with high dust arrangement are usually arranged between boiler economizer and air preheater. Restricted by the layout space, SCR reactors cannot be directly arranged under boiler economizer (except vertical boilers), but flue gas is led out through horizontal flue and connected to SCR reactor through rising flue,

根据发达国家的经验，SCR脱硝技术必将成为我国火电厂燃煤锅炉的主要脱硝技术，并得到越来越广泛的应用。SCR法脱硝关键技术，工程上常用的、成熟的脱硝技术主要有低氮燃烧技术、SNCR法烟气脱硝技术、SCR法烟气脱硝技术, 本文仅针对工程上应用更多、脱硝效率高的SCR法烟气脱硝技术进讨。

According to the experience of developed countries, SCR denitrification technology will become the main denitrification technology of coal-fired boiler in thermal power plants in China, and it will be widely used. SCR denitrification key technology, commonly used in engineering, mature denitrification technology mainly includes low nitrogen combustion technology, SNCR flue gas denitrification technology, SCR Flue Gas Denitrification Technology, this paper only discusses SCR Flue gas denitration technology which has the most application in the project and high denitrification efficiency.

通过对催化剂表面的酸性控制，达到吸附保护的目的，使得催化剂表面不吸附氧化砷；另一种方法是改进活性位，通过高温煅烧获得稳定的催化剂表面，

The purpose of adsorption protection is achieved by controlling the acidity of catalyst surface, so that arsenic oxide is not adsorbed on the catalyst surface; another method is to improve the active position and obtain stable catalyst surface by calcination at high temperature,

着重在设计并制备高活性的催化剂上，改进催化剂的组成，提高活性，降低成本，提高催化剂寿命。催化剂在实际工程应用中，要通过合理的流场设计 ，瓦斯发电机scr脱硝

The design and preparation of high activity catalyst are emphasized, which can improve the composition of catalyst, improve the activity, reduce the cost and improve the catalyst life. In practical engineering application, catalyst should be denitrated by SCR of gas generator through reasonable flow field design

流场模拟试验，进入反应器催化剂层入口的烟气流场分布均匀与否直接影响脱硝系统的各项性能指标, 如果流场分布不均匀, 不但会严重影响脱硝效率、增加氨的逃逸、加速催化剂磨损, 严重时还会堵塞催化剂或引起空气预热器的堵塞和严重腐蚀, 从而影响主机的正常运行, 因此, 流场模拟试验研究在脱硝系统设计中极为重要。

The flow field simulation test shows that the distribution of flue gas flow into the catalyst layer inlet of the reactor directly affects the performance indexes of denitration system. If the flow field distribution is not uniform, it will not only seriously affect denitration efficiency, increase ammonia escape, accelerate catalyst wear, but also block catalyst or cause blockage and serious corrosion of air preheater, Therefore, the simulation experiment of flow field is very important in the design of denitration system.

典型流场设计要求的反应器顶层催化剂层入口烟气条件见表2, 如果要求脱硝效率达到85%以上, 则催化剂层入口的烟气条件还要更严格。流场模拟试验研究主要分为计算流体力学CFD计算与物理模型试验验证2部分。CFD计算更为关键的是计算模型的建立与边界条件的设定,

The flue gas conditions at the top catalyst layer of typical flow field design are shown in Table 2. If denitrification efficiency is required to reach more than 85%, the flue gas conditions at the entrance of catalyst layer should be more strict. The flow field simulation experiment is divided into two parts: CFD calculation and physical model test verification. The most important thing in CFD calculation is the establishment of calculation model and setting of boundary conditions,

防止飞灰的沉积，定期对催化剂进行吹扫；控制好温度，防止催化剂烧结；催化剂停用时要对催化剂进行保护。

Prevent the deposition of fly ash, purge the catalyst regularly; control the temperature to prevent the catalyst sintering; protect the catalyst when the catalyst is out of service.

更多的关于瓦斯发电机组的问题或者详细的内容，请进入我们公司的网站：//www.gz-yanye.com 网站中会有很多的内容仅供参考。

For more questions or details about gas generating sets, please visit our company's website: //www.gz-yanye.com  There will be a lot of content in the website for reference only.