锅炉受热面的冲蚀磨损与防护综述

李海燕, 刘欢, 王阁义, 张秀菊, 陈同舟, 俞云, 姚洪

Review on Erosion-wear and Protection of Heat Exchange Surface in Power Station Boilers

LI Haiyan, LIU Huan, WANG Geyi, ZHANG Xiuju, CHEN Tongzhou, YU Yun, YAO Hong

表1 冲蚀磨损预测模型

Table 1 Prediction models of erosion and wear

Number

Calculation formula

Meaning of symbols

References

E = \frac{K x^{4.95} ρ_{m} ρ_{p}^{1 / 2} V^{3} s i n^{3} β}{H_{v}^{3 / 2}}

K: erosion constant; x: mass fraction of Si in the ash;ρ_m : density of mild steel; ρ_p : average density of ash particles; V: ash particle velocity; β: impingement angle;H_v : Vickers hardness number.

[52]

E = \sum_{j = 1}^{2} K_{j} C_{p_{j}} f β_{j} U_{i}^{n_{j}} g (D_{p}) h T_{h} ω_{j}

j

=1, 2, represent polygon-shaped and spherical particles, respectively; K: erosion constant;C_p : particulate concentration; β: impact angle, U_i: impact velocity; D_p : particle size; T_h : homologous temperature ratio; ω: chemical composition of fly-ash particles

[53]

$E (α) = {(s i n α)}^{n_{1}} (1 + H_{v} {(1 - s i n α))}^{n_{2}} E_{90}$

$E_{90} = K (a H_{v})^{k_{1} b} {(\frac{v}{v^{'}})}^{k_{2}} {(\frac{D}{D^{'}})}^{k_{3}}$

α: impact angle; H_v : Vickers hardness number; n₁、n₂、K、k₁、k₂、k₃ : indices and constants determined by the target material hardness, particle characteristics and erosion conditions.

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