【摘要】：隨著經(jīng)濟(jì)的發(fā)展,環(huán)境問題日趨嚴(yán)重,環(huán)保部關(guān)于大氣污染物的排放標(biāo)準(zhǔn)也日趨嚴(yán)格。為響應(yīng)國家環(huán)保政策,國華電力公司制定了“高品質(zhì)綠色發(fā)電”計(jì)劃,倡導(dǎo)煙氣污染物“近零排放”,即煙塵、SO2和NOX排放濃度限值分別為5、35和50(mg/Nm3),對火電廠污染物排放的控制提出了更高要求。為進(jìn)一步落實(shí)新的超低排放標(biāo)準(zhǔn),國華錦界能源有限責(zé)任公司需要對其二期2臺600MW亞臨界直接空冷機(jī)組脫硫除塵系統(tǒng)實(shí)施改造。本文以該公司二期2臺600MW亞臨界直接空冷機(jī)組脫硫除塵系統(tǒng)為研究對象,對其污染物排放情況進(jìn)行了調(diào)研與評估,考慮到本次改造脫硫及協(xié)同除塵效率要求高以及需充分利用現(xiàn)有設(shè)備等情況,提出了一些相應(yīng)的改造方案并進(jìn)行了分析比較,確定了SPC超凈脫硫除塵一體化和煙囪雨酸液收集系統(tǒng)技術(shù)改造方案并實(shí)施之。對改造后的脫硫除塵系統(tǒng)進(jìn)行了性能試驗(yàn)和效益評估,分析了其改造效果。結(jié)果表明:脫硫除塵系統(tǒng)改造后,鍋爐在不同工況下燃用校核煤種時,脫硫效率均在99%以上,超過了設(shè)計(jì)值98.3%,且脫硫出口SO2濃度不高于25mg/Nm3,煙囪入口煙塵濃度不高于5mg/Nm3,煙氣攜帶液滴濃度小于20mg/Nm3,消減了石膏雨現(xiàn)象;每年可削減SO2排放量約550t、煙塵排放量462t,排污費(fèi)減少97.59萬元,節(jié)省廠用電及費(fèi)用分別為1.87×106 k W?h和26.18萬元,經(jīng)濟(jì)效益明顯。達(dá)到了預(yù)期的改造效果,產(chǎn)生了良好的環(huán)境正效應(yīng)和社會效益。
[Abstract]:With the development of economy, the environmental problems are becoming more and more serious, and the emission standards of air pollutants of the Ministry of Environmental Protection are becoming more and more strict. In response to the national environmental protection policy, Guohua Electric Power Company has formulated a "high-quality green power generation" program, advocating "near-zero emissions" of flue gas pollutants, namely smoke, SO2 and NOX emission concentration limits of 5,35 and 50 (mg/Nm3), respectively. Higher requirements are put forward for pollutant emission control in thermal power plants. In order to further implement the new ultra-low emission standard, Guohua Jinjie Energy Co., Ltd needs to reform its second stage 2 600MW sub-critical direct air cooling unit desulphurization and dust removal system. In this paper, two 600MW sub-critical direct air-cooling unit desulfurization and dedusting system in the second phase of the company are taken as the research object, and the pollutant emission of the system is investigated and evaluated. Considering the high requirement of desulphurization and co-dedusting efficiency and the need to make full use of the existing equipment, some corresponding retrofit schemes are put forward and analyzed and compared. The integration of SPC ultra-clean desulfurization and dust removal and the technical transformation scheme of chimney rain acid collection system are determined and implemented. The performance test and benefit evaluation of the reformed desulphurization and dedusting system are carried out, and the retrofitting effect is analyzed. The results show that the efficiency of desulfurization is over 99%, which exceeds the designed value of 98.3%, and the concentration of SO2 at the outlet of desulphurization is not higher than 25 mg / m ~ (3), when the boiler is burning and checking coal under different working conditions after the reformation of the desulfurization and dust removal system. The smoke concentration at the entrance of the chimney is less than 5 mg / m ~ 3 and the concentration of droplets carried by the smoke is less than 20 mg / m ~ 3, which reduces the gypsum rain. The annual emission of SO2 is about 550 t, the emission of smoke and dust is 462 t, the sewage charge is reduced by nine hundred and seventy five thousand nine hundred yuan, the power consumption and the cost are 1.87 脳 10 ~ 6 kW / h and two hundred and sixty one thousand seven hundred and ninety nine yuan, respectively. The economic benefit is obvious. The expected transformation effect has been achieved, and good environmental positive effect and social benefit have been produced.
【學(xué)位授予單位】：華北電力大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM621.73

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