【摘要】：風機是工、農(nóng)業(yè)生產(chǎn)中發(fā)揮重要作用的通用機械，數(shù)量極其龐大，耗能十分可觀，具有相當大的的節(jié)能潛力。因此，研究風機的節(jié)能降耗問題，對“節(jié)能減排”具有十分重要的意義。 在火力發(fā)電廠中，主要輔機的經(jīng)濟運行直接關(guān)系到廠用電率的高低，而廠用電率的高低又是影響發(fā)電成本和供電煤耗的重要因素。風機作為電站鍋爐的主要輔機，其電耗占廠用電的30%左右，因此開展電廠風機的經(jīng)濟運行、節(jié)能研究很有必要。 本文以吉林省某熱電廠200MW機組的680t/h鍋爐為例，對相應(yīng)的兩類引風機進行數(shù)值模擬與節(jié)能降耗改造研究。首先利用Pro/E軟件對離心通風機和軸流通風機的整機內(nèi)部流動進行三維流場建立模型；然后在專門的網(wǎng)格劃分軟件GAMBIT中對兩個風機的三維流場模型進行網(wǎng)格劃分和邊界條件設(shè)置；最后采用CFD商業(yè)軟件FLUENT，利用標準k-ε模型、分離隱式求解器分別對兩個風機模型進行數(shù)值模擬并分析了數(shù)值模擬結(jié)果。通過對整機內(nèi)部及出口流場的研究，，分析出流體在通風機內(nèi)部及出口的速度矢量分布和壓力分布，進行離心式通風機和軸流式通風機流場對比分析，為該電廠風機的節(jié)能改造提供了理論依據(jù)。最后以該電廠一臺機組引風機系統(tǒng)為例進行節(jié)能降耗改造和試驗研究，改造后引風機單位電耗降低了1.25kW·h/t，并且為同等類型的火力發(fā)電機組風機節(jié)能改造提供參考。
[Abstract]:Fan is a kind of general machinery which plays an important role in agricultural production. Therefore, it is of great significance to study the energy saving and consumption reduction of fan. In the thermal power plant, the economic operation of the main auxiliary machine is directly related to the power consumption rate, and the power consumption rate is an important factor affecting the generation cost and coal consumption. Fan is the main auxiliary machine of boiler in power station, and its electricity consumption is about 30% of the total power consumption. Therefore, it is necessary to carry out economic operation of fan in power plant and study on energy saving. Taking the 680t/h boiler of the 200MW unit of a thermal power plant in Jilin Province as an example, the numerical simulation of two kinds of induced fans and the retrofit of saving energy and reducing consumption are carried out in this paper. Firstly, the three-dimensional flow field model of centrifugal fan and axial fan is established by using Pro/E software. Then, the 3D flow field model of two fans is meshed and the boundary conditions are set in the special meshing software GAMBIT. Finally, using the standard k- 蔚 model and the CFD commercial software FLUENT, two fan models are numerically simulated and the numerical simulation results are analyzed. Through the study of the flow field inside and out of the whole machine, the velocity vector distribution and pressure distribution of the fluid inside and out of the fan are analyzed, and the flow field of centrifugal fan and axial flow fan is compared and analyzed. It provides a theoretical basis for the retrofit of fan energy saving in this power plant. Finally, taking the fan system of one unit of the power plant as an example, the energy saving and consumption reduction is carried out. After the transformation, the unit power consumption of the induced fan is reduced and the 1.25kW h / t is reduced, which provides a reference for the energy saving transformation of the same type of thermal power generating unit fan.
【學(xué)位授予單位】：東北電力大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TH43

【參考文獻】

相關(guān)期刊論文 前10條

1 童家麟;葉學(xué)民;毛杰譽;吳思明;;引風機和增壓風機合并運行節(jié)能效果分析[J];電力科學(xué)與工程;2011年05期

2 吳阿峰;潘灝;譚燦q

本文編號：2411606