摘 要

我国水泥产量现居世界第一，全国每年新增水泥产量占世界产量80%以上。同时，水泥工业的大气污染物排放问题也日益严重，其中氮氧化物的过度排放严重影响人们的正常工作与生活，已成为当前迫切需要解决问题。水泥工业是继电力、机动车之后的氮氧化物第三大排放源。因此为改善大气环境，减少氮氧化物的排放，对水泥工业烟气排放提出了更严格的要求。

本文主要针对水泥工业氮氧化物的排放问题，研究一种新型工业脱硝技术的实际应用，初步设计水泥工业联合脱硝技术方案，该方案为多级还原技术 SNCR技术，新增分煤、分料、分风系统，把分解炉由上而下分为SNCR脱硝区、燃尽区、二次还原区、主燃区、一次还原区，同时在原有的SNCR技术进行优化，增加多个氨水喷嘴，讲氨水喷嘴设计合理，形成多级还原“5 1”联合脱硝系统，极大降低了该水泥厂氨水的用量和氮氧化物的排放量。

水泥联合工业脱硝技术具有提高脱硝效率，降低运行成本，减少氮氧化物排放的优势。不仅为ZY水泥企业带来了巨大的经济效益，同时极大改善水泥企业所在地的区域环境，改变当地民众对传统水泥工业的印象，使该水泥生产企业能够成为环境友好型企业，增强水泥工业对国家循环经济发展的支撑作用，提高了对污染物扩散的控制能力，在水泥工业中建立起可持续发展的技术示范模式。

关键词：水泥脱硝；分级燃烧；SNCR技术；工艺优化

Abstract

China's cement production ranks first in the world, the country's new cement production each year accounted for more than 80% of the world's output. At the same time, the emission of air pollutants in cement industry is increasingly serious, which seriously affects the normal work and life of people, and has become an urgent need to solve the problem. Cement industry is the third largest source of nitrogen oxides after electric power and motor vehicle. In order to improve the atmospheric environment and reduce the emission of nitrogen oxides, the cement industry has been put forward more stringent requirements.

In this paper, mainly for the cement industry emissions of nitrogen oxides, a new industry study denitration technology practical application, the preliminary design of joint cement industry denitration technology program, which is multi-stage reduction technology SNCR technology, the new sub-coal, riving , air distribution system, the top-down decomposition furnace into SNCR denitration zone, burnout zone, the second reduction zone, the primary combustion zone, a reduction zone, while the original SNCR technology to optimize, increase the number of nozzles ammonia, speak ammonia nozzle design is reasonable, the formation of multi-level restore "5 1" joint denitration system, greatly reducing the amount of emissions of nitrogen oxides and ammonia in the cement plant.

Cement Joint Industrial denitration denitration technology with improved efficiency, lower operating costs, reduce nitrogen oxide emissions advantages. Not only brought huge economic benefits ZY cement business, while greatly improving the cement business location areas of environment, change local people the impression that the traditional cement industry, so that the cement production enterprises to become environment-friendly enterprises, reinforced cement industry to supporting the role of national development of circular economy, improve the ability to control the spread of pollutants, and establish a technology demonstration model of sustainable development in the cement industry.

Key words: Cement denitrification; staged combustion; SNCR technology;

process optimization

目 录

Abstract 4

第1章 绪论 1

1.1研究背景 1

1.2工业脱硝技术现状 2

1.2.1国内外工业脱硝技术现状 2

1.2.2工业脱硝技术所存在的问题 3

1.3研究内容、目标、技术路线 4

1.3.1研究内容及目标 4

1.3.2研究技术路线 4

第2章 山西ZY水泥厂示范线新型工业脱硝工艺简介 5

2.1 山西ZY水泥厂示范线的基本介绍 5

2.2脱硝工艺及其脱硝效果 5

2.3脱硝工艺存在的不足 7

2.4本章小结 7

第3章 水泥厂示范线新型工业脱硝工艺研究与设计 7

3.1新型脱硝工艺技术原理 7

3.2新型脱硝工艺技术方案设计 8

3.3新型脱硝工艺技术应用设计 9

3.3.1多级还原分级燃烧脱硝技术 9

3.3.2 SNCR技术的优化 13

3.4本章小结 14

第四章 某水泥厂示范线新型工业脱硝工艺生产调试 14

4.1新型脱硝工艺生产调试 14

4.1.1调试计划 14

4.1.2调试阶段 15

4.2新型脱硝工艺数据整理与分析 21

4.3新型脱硝工艺的应用效果 22

4.3.1经济效益与社会效益 22

4.3.2存在的问题 23

4.4本章小结 23

第5章 结论 25

参考文献 26

致 谢 28

第1章 绪论

1.1研究背景