Engineering experiment on low-temperature denitration of 15000m3/h refractory baking furnace flue gas

doi:10.16085/j.issn.1000-6613.2020-0460

Chemical Industry and Engineering Progress ›› 2020, Vol. 39 ›› Issue (S2): 401-405.DOI: 10.16085/j.issn.1000-6613.2020-0460

• Resources and environmental engineering • Previous Articles Next Articles

Engineering experiment on low-temperature denitration of 15000m³/h refractory baking furnace flue gas

Tong TANG¹^,²(), Yongjian YANG¹^,², Zude WAN¹^,², Shaocong CHI¹^,², Pan ZHAO¹^,², Wenfeng HUANG¹^,², Ming LI¹^,²

^1.Sichuan Entech Environmental Technology Co. , Ltd. , Mianyang 621000, Sichuan, China
^2.National Flue Gas Desulfurization Engineering Technology Research Center, Chengdu 610041, Sichuan, China

Received:2020-03-25 Online:2020-11-17 Published:2020-11-20
Contact: Tong TANG

15000m³/h耐火材料厂焙烧窑炉烟气低温脱硝工程实验

唐彤¹^,²(), 杨永见¹^,², 万祖德¹^,², 池少聪¹^,², 赵攀¹^,², 黄文凤¹^,², 李明¹^,²

^1.四川恒泰环境技术有限责任公司，四川绵阳 621000
^2.国家烟气脱硫工程技术研究中心，四川成都 610041

通讯作者: 唐彤
作者简介:唐彤（1994—），女，硕士，研究方向为大气污染防控。E-mail：tangtong1281@163.com。
基金资助:
四川省重大科技专项(2019YFS0500)

Abstract

Abstract:

Refractory, prepared by high-temperature calcination, was a necessary basic material for industrial lining. In this way, NO_x concentration originated from the oxidation of N₂ in the air was according to the changes in the production section. Since NO_x removal treatment for refractory baking furnace flue gas had not been clearly reported, the selective catalytic reduction (SCR) method was firstly utilized in engineering experiment. The optimal process conditions were obtained based on the fuel gas parameters. Meanwhile, the effects of flue gas temperature, ammonia-nitrogen ratio and space velocity on denitration efficiency were systematically investigated. The results showed that when the flue gas temperature was 165℃, the ammonia-nitrogen ratio was 1.3, and the space velocity was 2000h^-1, the denitration rate could reach to 90%. It had good prospects for the promotion of denitration treatment of refractory baking furnace flue gas.

Key words: selective catalytic reduction (SCR), catalyst, activity, low-temperature denitration, refractory

摘要：

耐火材料是一种必要的工业炉衬基础材料，经过高温煅烧制得，空气中的N₂高温氧化形成NO_x，且窑炉烟气中NO_x浓度根据生产工段的变化而波动。目前国内在耐火材料焙烧窑炉烟气NO_x脱除方面的工艺少有报道。为解决这一问题，本文首次提出将选择性催化还原（SCR）法运用到耐火材料焙烧窑炉烟气脱硝工程实验中，根据特定工况烟气参数，通过调整反应参数得到了最佳工艺条件。系统地考察了烟气温度、氨氮比和空速对脱硝效率的影响。研究结果表明，当烟气温度为165°C、氨氮比为1.3、空速为2000h^-1时，脱硝效果最佳，脱硝率可达到90%。对于耐火材料焙烧窑炉烟气脱硝治理推广具有较好的前瞻性。

关键词: 选择性催化还原, 催化剂, 活性, 低温脱硝, 耐火材料

CLC Number:

X511

Tong TANG, Yongjian YANG, Zude WAN, Shaocong CHI, Pan ZHAO, Wenfeng HUANG, Ming LI. Engineering experiment on low-temperature denitration of 15000m³/h refractory baking furnace flue gas[J]. Chemical Industry and Engineering Progress, 2020, 39(S2): 401-405.

唐彤, 杨永见, 万祖德, 池少聪, 赵攀, 黄文凤, 李明. 15000m³/h耐火材料厂焙烧窑炉烟气低温脱硝工程实验[J]. 化工进展, 2020, 39(S2): 401-405.

Figures/Tables 7

References 9

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项目	参数
外观	黑色柱状物
规格	?(3.5～4.5)mm×(6～10)mm
堆密度	0.45～0.55g/cm3
强度	≥120N/cm
水分	≤5%
碘吸附值	≥800mg/g
四氯化碳	≥40%
灰分	≤10%
成分组成	Mn/AC
比表面积	479m²/g

项目	参数
外观	黑色柱状物
规格	?(3.5～4.5)mm×(6～10)mm
堆密度	0.45～0.55g/cm3
强度	≥120N/cm
水分	≤5%
碘吸附值	≥800mg/g
四氯化碳	≥40%
灰分	≤10%
成分组成	Mn/AC
比表面积	479m²/g

序号	参数	数值
1	烟气温度	120～180℃
2	烟气流量	15000m³·h^-1
3	入口NO_x浓度	100～2400mL·L^-1
4	入口SO₂浓度	＜50mL·L^-1
5	入口粉尘浓度	＜1000mg·m^-3
6	氧含量	18%
7	水含量	0.03%

序号	参数	数值
1	烟气温度	120～180℃
2	烟气流量	15000m³·h^-1
3	入口NO_x浓度	100～2400mL·L^-1
4	入口SO₂浓度	＜50mL·L^-1
5	入口粉尘浓度	＜1000mg·m^-3
6	氧含量	18%
7	水含量	0.03%

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