煤气发电机组的技术改进研究

　　Research on Technical Improvement of Gas Generator Unit

　　双孔燃气发生器项目：基于航空发动机燃烧室提出了一种双孔燃气发生器项目。设计并制造了一套单喷嘴燃气发生器。在不同条件下进行了热试车，以验证燃气发生器的性能，并对乙醇供应系统的工作模式、贫燃熄火极限测试和系统顺序优化进行了研究。测试结果表明，该发生器的技术设计方案可行，质量流量、温度和压力均满足设计目标。平稳的点火曲线表明发生器点火可靠，燃烧性能稳定，并且该燃气发生器具有分步启动的优点；通过优化乙醇供应顺序，解决了阀门工作顺序引起的供应管道冲击效应问题，并结合气压调节优化，大大缩短了燃气发生器的启动时间；该燃气发生器具有较大的贫燃熄火极限，能够在宽工作范围内稳定工作。

　　Double hole gas generator project: A dual hole gas generator project based on the combustion chamber of aircraft engines is proposed. Designed and manufactured a single nozzle gas generator. Hot commissioning was conducted under different conditions to verify the performance of the gas generator, and the working mode, lean burn out limit test, and system sequence optimization of the ethanol supply system were studied. The test results indicate that the technical design scheme of the generator is feasible, and the mass flow rate, temperature, and pressure all meet the design objectives. A stable ignition curve indicates reliable ignition and stable combustion performance of the generator, and the gas generator has the advantage of step-by-step starting; By optimizing the ethanol supply sequence, the problem of supply pipeline impact caused by valve operation sequence has been solved, and combined with pressure regulation optimization, the start-up time of the gas generator has been greatly shortened; This gas generator has a large lean burn out limit and can operate stably over a wide working range.

　　钢铁行业煤气发电机组效率提升技术：煤气锅炉配套蒸汽轮机发电机组是目前钢铁行业富余煤气的主要利用方式。随着煤气发电技术的不断迭代，不同代际发电技术的能源利用效率差异显著，同代际煤气发电机组能源利用效率也参差不齐。结合唐钢公司提升 100MW 超高温亚临界煤气发电机组能源利用效率的实践，探究煤气发电机组效率提升技术，以期为钢铁行业节能创效提供参考。

　　Efficiency improvement technology for gas generators in the steel industry: Gas boilers paired with steam turbine generators are currently the main way to utilize surplus gas in the steel industry. With the continuous iteration of gas power generation technology, there are significant differences in energy utilization efficiency between different generations of power generation technology, and the energy utilization efficiency of gas power generation units within the same generation is also uneven. Based on the practice of Tangshan Iron and Steel Company in improving the energy utilization efficiency of 100MW ultra-high temperature subcritical gas generator units, this paper explores the efficiency improvement technology of gas generator units, in order to provide reference for energy conservation and efficiency creation in the steel industry.

　　煤气发电机组的噪声控制研究

　　 Research on Noise Control of Gas Generator Unit

　　对以天然气为燃料的小型发电机组进行了不同开发的隔音罩对噪声排放影响的实验研究。在发电机排气前方的五个电负荷条件（0％、25％、50％、75％和 100％负荷）下测量了无罩发电机和被开发的隔音罩覆盖的发电机的声音信号。根据 SAE J1074 测试程序测量声音信号。使用快速傅里叶变换（FFT）算法将记录的数字声音信号转换到频域。结果表明，简单罩（SE）和改进罩分别在频率大于 800Hz 和 250Hz 时有效地衰减了发电机噪声。半覆盖改进罩（SME）和全覆盖改进罩（FME）在衰减发电机噪声方面的声学性能优于 SE 罩。所有罩的声学性能随着发电机负荷的增加而降低，特别是在满负荷条件下。方差分析（ANOVA）的结果表明，发电机负荷条件、罩设置模式及其相互作用对发电机 A 加权总声有显著影响（P＜0.01）。邓肯多范围测试的结果表明，用不同类型的罩覆盖发电机可将发电机声级（93.2dB（A））显著降低至 SE 的 88.4dB（A）、SME 的 87.2dB（A）和 FME 的 86.1dB（A）。他们还揭示了发电机声音随着发电机电负荷的增加而显著增加（P＜0.01）。

　　An experimental study was conducted on the impact of different developed soundproof enclosures on noise emissions of small power generation units fueled by natural gas. The sound signals of the generator without a hood and the generator covered with a developed soundproof hood were measured under five electrical load conditions (0%, 25%, 50%, 75%, and 100% load) in front of the generator exhaust. Measure the sound signal according to the SAE J1074 test procedure. Convert the recorded digital audio signal to the frequency domain using the Fast Fourier Transform (FFT) algorithm. The results indicate that the simple cover (SE) and the improved cover effectively attenuate generator noise at frequencies greater than 800Hz and 250Hz, respectively. The acoustic performance of the semi covered improved hood (SME) and the fully covered improved hood (FME) in attenuating generator noise is superior to that of the SE hood. The acoustic performance of all covers decreases with increasing generator load, especially under full load conditions. The results of analysis of variance (ANOVA) indicate that the load conditions of the generator, the cover setting mode, and their interactions have a significant impact on the weighted total sound of generator A (P<0.01). The results of Duncan's multi range testing show that covering the generator with different types of covers can significantly reduce the generator sound level (93.2dB (A)) to 88.4dB (A) for SE, 87.2dB (A) for SME, and 86.1dB (A) for FME. They also revealed that the sound of the generator significantly increased with the increase of the generator's electrical load (P<0.01).

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