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tianli866150: 金币+500, 翻译EPI+1, ★★★很有帮助 2018-01-03 11:10:05
基于 金川热电MTZ3258型 球磨机 节能降噪 研究
Study of energy conservation and noise reduction of Jinchuan MTZ3258 thermoelectric ball mill
钢球磨煤机 具有 煤种适应性强、磨机单台 出力高、运行安全可靠、维护简单方便 等优点，在燃煤发电、水泥、矿山等制粉行业中广泛应用。钢球磨煤机 能耗高、噪声大，其存在 噪声频带宽、非线性、大滞后等特点，传统的技术 无法达到 最优化的 节能与降噪目的。因此，研究一种合理的钢球磨煤机节能降噪方案是十分必要的。
With advantages of wide adaptability, high output, reliable operation and easy maintenance, steel ball coal mill has been widely applied in coal-fired power generation, cement industry and milling industry, etc. However, it is subjected to disadvantages such as high power consumption, large noise, as well as wideness, nonliearilty and large lag of noise band, conventional technologies cannot realize optimal effect of energy conservation and noise reduction. On this basis, it is necessary to develop a reasonable scheme for energy conservation and noise reduction of steel ball coal mill.
本文以 金川热电厂 热电二车间 2#炉的 MTZ3258型 磨煤机 节能降噪为目的，对球磨机的工作原理及其噪声产生与传播进行 科学分析，充分考虑 磨煤机节能与降噪的互补关系，制定了一套合理的磨机节能降噪方案：
In order to realize energy conservation and noise reduction of MTZ3258 thermoelectric ball mill in 2# furnace of Jinchuan thermal power plant second workshop, this paper analyzes the working principle of ball mill as well as the mechanisms of noise generation and transmission, and develops a set of reasonable schemes for energy conservation and noise reduction of ball mill by fully considering the complement relation between energy conservation and noise reduction.
在球磨机节能方面，第一，对球磨机 制粉过程 优化控制，确保 磨机 处于最佳工况运行，提高 磨机的出力，降低磨机能耗，使球磨机噪声最小；第二，设计 钢球 自动添加筛选技术，剔除 球磨机内的失效钢球，降低能耗，同时减少钢球、衬板、煤块之间相互撞击，减少球磨机噪声源。
In terms of energy conservation. First, the scheme is focused on optimizing the control of ball milling process, to guarantee the optimal working condition, improve the output, reduce energy consumption and minimize the noise of ball mill; second, a technique of automatic adding and screening steel ball is proposed to remove the ineffective steel balls, reduce energy consumption, reduce collisions among steel ball, lining plate and coal block, so as to reduce the noise sources of ball mill.
在球磨机降噪方面，第一，衬板使用橡胶衬板，缓冲 钢球与衬板 的 冲击时间，减小衬板所受的冲击力与衬板的振动强度，降低噪声产生的强度，控制磨机声源振动强度；第二，降低噪音传播，在磨机外部加装隔音罩，用于吸收、反射、隔离球磨机产生的噪音。为了确保球磨机节能降噪方案的可行性，利用COMSOL软件对方案中设计的 球磨机 隔音罩声场进行仿真，验证方案在降噪方面的优越性能。
In terms of noise reduction. First, a rubber lining is used to reduce the impact time between steel ball and lining plate, reduce the shock force applied on lining plate and its vibration intensity, reduce noise intensity, and control the vibration intensity of ball mill sound source; second, a sound-proof shield is added exteranlly on the ball mill to absorb, reflect and isolate noise. To make sure the energy conservation and noise reduction scheme is realiable, the sound field of sound-proof shield was simulated using COMSOL software to verify the advantgeous performance of proposed scheme in noise reduction.
目前，该方案已在 金川热电厂 热电二车间 2#炉的 MTZ3258型磨煤机应用，通过 节能降噪前后的 数据对比分析可知，该球磨机 噪声强度 平均降低了28 dB，制粉煤单耗减少15.28346%，实现了球磨机降低噪声节能改造的目的。本文的研究为球磨机降噪与节能改造 提供了一个有效的方案。
Currently, such scheme has been applied for MTZ3258 ball mill in 2# furnace of Jinchuan thermal power plant second workshop. Through comparative analysis of data before and after implemenating energy conservation and noise reduction scheme, it can be known that the noise intensity of ball mill is decreased by 28 dB by average, coal mill unit consumption is reduced by 15.28346%, which basically meets the target of energy conservation and noise reduction. This study provides an effective solution to the energy conservation and noise reduction of ball mill.
关键词：钢球磨煤机；优化控制；节能；降噪；隔音罩；
Keywords: steel ball coal mill; optimization control; energy conservation; noise reduction; sound-proof shield |
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