煤氣發(fā)電機組的技術(shù)改進研究

　　Research on Technical Improvement of Gas Generator Unit

　　雙孔燃氣發(fā)生器項目：基于航空發(fā)動機燃燒室提出了一種雙孔燃氣發(fā)生器項目。設(shè)計并制造了一套單噴嘴燃氣發(fā)生器。在不同條件下進行了熱試車，以驗證燃氣發(fā)生器的性能，并對乙醇供應系統(tǒng)的工作模式、貧燃熄火極限測試和系統(tǒng)順序優(yōu)化進行了研究。測試結(jié)果表明，該發(fā)生器的技術(shù)設(shè)計方案可行，質(zhì)量流量、溫度和壓力均滿足設(shè)計目標。平穩(wěn)的點火曲線表明發(fā)生器點火可靠，燃燒性能穩(wěn)定，并且該燃氣發(fā)生器具有分步啟動的優(yōu)點；通過優(yōu)化乙醇供應順序，解決了閥門工作順序引起的供應管道沖擊效應問題，并結(jié)合氣壓調(diào)節(jié)優(yōu)化，大大縮短了燃氣發(fā)生器的啟動時間；該燃氣發(fā)生器具有較大的貧燃熄火極限，能夠在寬工作范圍內(nèi)穩(wěn)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.

　　鋼鐵行業(yè)煤氣發(fā)電機組效率提升技術(shù)：煤氣鍋爐配套蒸汽輪機發(fā)電機組是目前鋼鐵行業(yè)富余煤氣的主要利用方式。隨著煤氣發(fā)電技術(shù)的不斷迭代，不同代際發(fā)電技術(shù)的能源利用效率差異顯著，同代際煤氣發(fā)電機組能源利用效率也參差不齊。結(jié)合唐鋼公司提升 100MW 超高溫亞臨界煤氣發(fā)電機組能源利用效率的實踐，探究煤氣發(fā)電機組效率提升技術(shù)，以期為鋼鐵行業(yè)節(jié)能創(chuàng)效提供參考。

　　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.

　　煤氣發(fā)電機組的噪聲控制研究

　　 Research on Noise Control of Gas Generator Unit

　　對以天然氣為燃料的小型發(fā)電機組進行了不同開發(fā)的隔音罩對噪聲排放影響的實驗研究。在發(fā)電機排氣前方的五個電負荷條件（0％、25％、50％、75％和 100％負荷）下測量了無罩發(fā)電機和被開發(fā)的隔音罩覆蓋的發(fā)電機的聲音信號。根據(jù) SAE J1074 測試程序測量聲音信號。使用快速傅里葉變換（FFT）算法將記錄的數(shù)字聲音信號轉(zhuǎn)換到頻域。結(jié)果表明，簡單罩（SE）和改進罩分別在頻率大于 800Hz 和 250Hz 時有效地衰減了發(fā)電機噪聲。半覆蓋改進罩（SME）和全覆蓋改進罩（FME）在衰減發(fā)電機噪聲方面的聲學性能優(yōu)于 SE 罩。所有罩的聲學性能隨著發(fā)電機負荷的增加而降低，特別是在滿負荷條件下。方差分析（ANOVA）的結(jié)果表明，發(fā)電機負荷條件、罩設(shè)置模式及其相互作用對發(fā)電機 A 加權(quán)總聲有顯著影響（P＜0.01）。鄧肯多范圍測試的結(jié)果表明，用不同類型的罩覆蓋發(fā)電機可將發(fā)電機聲級（93.2dB（A））顯著降低至 SE 的 88.4dB（A）、SME 的 87.2dB（A）和 FME 的 86.1dB（A）。他們還揭示了發(fā)電機聲音隨著發(fā)電機電負荷的增加而顯著增加（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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