Power Generation Technology ›› 2022, Vol. 43 ›› Issue (1): 168-174.DOI: 10.12096/j.2096-4528.pgt.20030
• Power Generation and Environmental Protection • Previous Articles
Qianwei FENG1, Renhan ZHU2, Sida XU1, Bo LIU1, Yang ZHANG1, Fengji WANG1, Yue ZHU1
Received:
2021-06-08
Published:
2022-02-28
Online:
2022-03-18
Supported by:
CLC Number:
Qianwei FENG, Renhan ZHU, Sida XU, Bo LIU, Yang ZHANG, Fengji WANG, Yue ZHU. Performance Evaluation and Analysis of Key Parameters of SCR Ultra-low Emission for 1 000 MW Coal-fired Unit[J]. Power Generation Technology, 2022, 43(1): 168-174.
设计参数 | 数值 |
---|---|
机组容量/MW | 1 000 |
脱硝装置入口NO x 质量浓度/(mg·m-3) | 400 |
脱硝装置出口NO x 质量浓度/(mg·m-3) | ≤50 |
脱硝效率/% | ≥87.5 |
氨逃逸质量浓度/(mg·m-3) | ≤2.28 |
飞灰质量浓度/(g·m-3) | 50 |
脱硝装置单反应器入口烟道截面/(m×m) | 4.6×14.804 |
Tab. 1 Main design parameters of denitrification system for a 1 000 MW coal-fired unit
设计参数 | 数值 |
---|---|
机组容量/MW | 1 000 |
脱硝装置入口NO x 质量浓度/(mg·m-3) | 400 |
脱硝装置出口NO x 质量浓度/(mg·m-3) | ≤50 |
脱硝效率/% | ≥87.5 |
氨逃逸质量浓度/(mg·m-3) | ≤2.28 |
飞灰质量浓度/(g·m-3) | 50 |
脱硝装置单反应器入口烟道截面/(m×m) | 4.6×14.804 |
参数 | 负荷工况 | 原设计值 | ||
---|---|---|---|---|
高 | 中 | 低 | ||
A侧入口NO x 质量浓度/(mg·m-3) | 401 | 602 | 589 | 400 |
B侧入口NO x 质量浓度/(mg·m-3) | 377 | 590 | 551 | 400 |
A侧出口NO x 质量浓度/(mg·m-3) | 40 | 39 | 50 | 50 |
B侧出口NO x 质量浓度/(mg·m-3) | 43 | 36 | 43 | 50 |
A侧脱硝效率/% | 89.99 | 93.50 | 91.57 | 87.50 |
B侧脱硝效率/% | 88.63 | 93.92 | 92.24 | 87.50 |
平均脱硝效率/% | 89.32 | 93.71 | 91.89 | 87.50 |
Tab. 2 Test results of NO x concentration at inlet and outlet and its denitrification efficiency
参数 | 负荷工况 | 原设计值 | ||
---|---|---|---|---|
高 | 中 | 低 | ||
A侧入口NO x 质量浓度/(mg·m-3) | 401 | 602 | 589 | 400 |
B侧入口NO x 质量浓度/(mg·m-3) | 377 | 590 | 551 | 400 |
A侧出口NO x 质量浓度/(mg·m-3) | 40 | 39 | 50 | 50 |
B侧出口NO x 质量浓度/(mg·m-3) | 43 | 36 | 43 | 50 |
A侧脱硝效率/% | 89.99 | 93.50 | 91.57 | 87.50 |
B侧脱硝效率/% | 88.63 | 93.92 | 92.24 | 87.50 |
平均脱硝效率/% | 89.32 | 93.71 | 91.89 | 87.50 |
位置 | 相对标准偏差/% | ||
---|---|---|---|
高负荷 | 中负荷 | 低负荷 | |
A侧 | 3.5 | 2.5 | 5.4 |
B侧 | 1.7 | 1.8 | 5.0 |
Tab. 3 Relative standard deviation of NO x concentration distribution at inlet of SCR
位置 | 相对标准偏差/% | ||
---|---|---|---|
高负荷 | 中负荷 | 低负荷 | |
A侧 | 3.5 | 2.5 | 5.4 |
B侧 | 1.7 | 1.8 | 5.0 |
位置 | 相对标准偏差/% | ||
---|---|---|---|
高负荷 | 中负荷 | 低负荷 | |
A侧 | 62.2 | 69.0 | 57.6 |
B侧 | 52.2 | 38.5 | 35.0 |
Tab. 4 Relative standard deviation of NO x concentration distribution at outlet of SCR
位置 | 相对标准偏差/% | ||
---|---|---|---|
高负荷 | 中负荷 | 低负荷 | |
A侧 | 62.2 | 69.0 | 57.6 |
B侧 | 52.2 | 38.5 | 35.0 |
条件 | A侧出口 | B侧出口 | ||
---|---|---|---|---|
NH3质量 浓度 | NH3质量 浓度平均值 | NH3质量 浓度 | NH3质量 浓度平均值 | |
高负荷 | 2.54 | 4.73 | 2.83 | 3.16 |
3.86 | 3.47 | |||
7.81 | 3.17 | |||
中负荷 | 3.23 | 4.21 | 2.42 | 3.05 |
3.31 | 3.30 | |||
6.09 | 3.44 |
Tab. 5 Ammonia escape concentration atoutlet of SCR reactor
条件 | A侧出口 | B侧出口 | ||
---|---|---|---|---|
NH3质量 浓度 | NH3质量 浓度平均值 | NH3质量 浓度 | NH3质量 浓度平均值 | |
高负荷 | 2.54 | 4.73 | 2.83 | 3.16 |
3.86 | 3.47 | |||
7.81 | 3.17 | |||
中负荷 | 3.23 | 4.21 | 2.42 | 3.05 |
3.31 | 3.30 | |||
6.09 | 3.44 |
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