本文選題：中水 + 循環(huán)冷卻水��； 參考：《西南交通大學》2017年碩士論文

【摘要】：當今社會發(fā)展迅速隨著水資源需求量的不斷上升和淡水資源的短缺以及水資源環(huán)境受污染狀況日益嚴峻,水資源短缺已經(jīng)成為制約了的人類經(jīng)濟發(fā)展,威脅人類生存安全的一個嚴重問題。由于城市中水來源的穩(wěn)定性和低廉性,城市中水作為第二水資源加以開發(fā)利用就顯得尤為重要,成為緩解水資源緊缺的一個重要途徑。在熱電廠耗水中,循環(huán)冷卻水占總水量的90%以上,裝機容量2×330MW的熱電廠,每天循環(huán)冷卻水的補水量達2500t左右,消耗量很是巨大。因此,將城市中水回用作電廠循環(huán)冷卻水可以節(jié)約珍貴的水資源,實現(xiàn)再生水的循環(huán)利用,有利于國民經(jīng)濟和生態(tài)環(huán)境的和諧可持續(xù)發(fā)展。由于中水回用到循環(huán)冷卻水中會不斷地蒸發(fā)濃縮使水中各離子濃度含量不斷上升,當?shù)揭欢饪s倍率時便會影響到電力系統(tǒng)冷凝設(shè)備的腐蝕、結(jié)垢以及微生物孳生繁殖問題,妨礙循環(huán)冷卻水濃縮倍率的提高,危害熱電廠發(fā)電機組的安全運行。因此,熱電廠循環(huán)冷卻水必須經(jīng)過一定程度緩蝕阻垢的處理,從而一方面確保循環(huán)冷卻水濃縮倍數(shù)的提高,另一方面保證系統(tǒng)發(fā)電機組的正常安全運行。本文針對沈陽某熱電廠循環(huán)冷卻水中會不斷地蒸發(fā)濃縮使水中Ca2+濃度含量不斷上升,當濃縮倍率提高到一定閾值,便會影響到電力系統(tǒng)冷凝設(shè)備的腐蝕、結(jié)垢問題以及熱電廠現(xiàn)用JY-715型處理劑價格高,處理效果不佳等問題進行緩蝕阻垢劑的復(fù)合配方優(yōu)化。對取自沈陽西郊污水處理廠的二級處理水作為電廠循環(huán)冷卻水系統(tǒng)的補充水作為試驗用水。分別進行阻垢劑、緩蝕劑單一藥劑優(yōu)選試驗和復(fù)合配方濃度參數(shù)優(yōu)化試驗,統(tǒng)計試驗數(shù)據(jù)并觀察、分析試驗結(jié)果,再進行成本經(jīng)濟性分析。從而得到適合沈陽某熱電廠循環(huán)冷卻水緩蝕阻垢優(yōu)化復(fù)合配方。通過對優(yōu)選出的緩蝕劑、阻垢劑的品種和適宜濃度的結(jié)果再進行緩蝕阻垢劑的復(fù)合配方優(yōu)化,對其二元、三元復(fù)配的協(xié)同增效作用及拮抗減效作用進行探究分析。然后以此對五種緩蝕阻垢藥劑進行正交試驗分析,確定復(fù)合配方甲(PASP:PBTCA:HEDP:水溶性咪唑啉:EDTMPS 為 17:20:23:17:16mg/L)和復(fù)合配方乙(PASP:PBTCA:HEDP:水溶性咪唑啉:EDTMPS為20:20:28:17:16mg/L)為試驗較優(yōu)配方,其對應(yīng)的阻垢率和緩蝕率分別是97.9%、97.9%和96.7%、98.9%。對優(yōu)化后的復(fù)配藥劑進行成本經(jīng)濟性分析。復(fù)合配方甲(PASP:PBTCA:HEDP:水溶性咪唑啉:EDTMPS為17:20:23:17:16mg/L)處理成本為1.712元/m3,復(fù)合配方乙(PASP:PBTCA:HEDP:水溶性咪唑啉:EDTMPS 為 20:20:28:17:16mg/L)處理成本為1.873元/m3,沈陽某熱電廠現(xiàn)在所用JY-715型水處理劑單價約為2.5元/m3。比較可知,采用復(fù)合配方甲(PASP:PBTCA:HEDP:水溶性咪唑啉:EDTMPS為17:20:23:17:16mg/L)每年可節(jié)省約 680832 元。將實驗室配制的復(fù)合配方甲(PASP:PBTCA:HEDP:水溶性咪唑啉:EDTMPS為17:20:23:17:16mg/L)與JY-715型緩蝕阻垢劑性能的現(xiàn)場驗證。JY-715型緩蝕阻垢劑的平均緩蝕率為90.9%,阻垢率為84.8%;而復(fù)合配方甲的平均緩蝕率達98.1%,阻垢率達97.8%。綜合比較,復(fù)合配方甲使用成本較低,緩蝕阻垢性能上表現(xiàn)出優(yōu)質(zhì)高效性,完全能夠保證沈陽某熱電廠循環(huán)冷卻水系統(tǒng)冷凝器、發(fā)電機組的穩(wěn)定、安全運行;在經(jīng)濟效益上也表現(xiàn)出一定的優(yōu)越性。
[Abstract]:With the increasing demand of water resources, the shortage of fresh water resources and the increasingly severe pollution of water resources and environment, the shortage of water resources has become a serious problem that restricts human economic development and threatens the safety of human survival. The development and utilization of water as second water resources is particularly important. It has become an important way to alleviate the shortage of water resources. In the water consumption of the thermal power plant, the circulating cooling water accounts for more than 90% of the total water and the installed capacity of the thermal power plant with a capacity of 2 * 330MW. The amount of replenishment of the circulating cooling water is about 2500t, and the consumption is very huge. Therefore, the city is in the middle of the city. The reuse of water as the circulating cooling water of the power plant can save precious water resources and realize the recycling of reclaimed water, which is beneficial to the harmonious and sustainable development of the national economy and the ecological environment. As the water recycling in the circulating cooling water will continuously evaporate and concentrate, the concentration of each ion in the water will rise continuously, and when the concentration ratio is to a certain concentration ratio, it will be reflected. The corrosion of the condensing equipment of the power system, the scaling and the breeding of the microorganism, hinders the increase of the concentration ratio of the circulating cooling water and endangers the safe operation of the thermoelectric power plant. Therefore, the circulating cooling water of the thermal power plant must be treated with a certain degree of corrosion and scale inhibition, thus ensuring the extraction of the concentration multiple of the circulating cooling water on the one hand. On the other hand, the normal and safe operation of the system generator set is guaranteed. This paper aims at the continuous evaporation and concentration of the circulating cooling water in a thermal power plant in Shenyang to increase the concentration of Ca2+ in the water continuously. When the concentration ratio is raised to a certain threshold, it will affect the corrosion of the condensing equipment in the power system, the problem of scaling and the current use of JY-715 in the thermal power plant. The compound formula of corrosion inhibitor is optimized with high price and poor treatment effect. The two grade water from the sewage treatment plant of the western suburb of Shenyang is used as the supplementary water of the circulating cooling water system of the power plant as the test water. Test, statistical test data and observation, analysis of the results of the test, and then the cost economy analysis. Thus the optimum compound formula for corrosion and scale inhibition of circulating cooling water in a thermal power plant in Shenyang is obtained. The compound formula of the corrosion inhibitor is optimized by the optimized corrosion inhibitor, the scale of the scale inhibitor and the suitable concentration. The synergistic synergism and antagonistic effect of the three element compound were investigated and analyzed. Then, the orthogonal test was carried out to determine the compound formula a (PASP:PBTCA:HEDP: water-soluble imidazoline: EDTMPS 17:20:23:17:16mg/L) and compound formula B (PASP:PBTCA:HEDP: water soluble imidazoline: EDTMPS as 20:20:28:17: 16mg/L) for the optimum formula, the corresponding scale and corrosion inhibition rate were 97.9%, 97.9% and 96.7% respectively. 98.9%. was used to analyze the cost economy of the optimized reagents. The compound formula a (PASP:PBTCA:HEDP: water-soluble imidazoline: EDTMPS 17:20:23:17:16mg/L) was treated as 1.712 yuan /m3, and the compound formula B (PASP:PBTCA:HEDP: water solubility) Imidazoline: EDTMPS 20:20:28:17:16mg/L) treatment cost of 1.873 yuan /m3, Shenyang a thermoelectric plant now use JY-715 type water treatment agent for a single price of about 2.5 yuan /m3. compared to the use of compound formula a (PASP:PBTCA:HEDP: water-soluble imidazoline: EDTMPS 17:20:23:17:16mg/L) can save about 680832 yuan per year. The performance of Fang Jia (PASP:PBTCA:HEDP: water-soluble imidazoline: EDTMPS 17:20:23:17:16mg/L) and JY-715 type corrosion inhibitor was verified by the average corrosion inhibition rate of 90.9% and the scale inhibition rate of 84.8%, while the average corrosion inhibition rate of the compound formula a was 98.1%, the scale inhibition rate was 97.8%. comprehensive comparison, and the compound formula a was lower in use cost. The performance of corrosion and scale inhibition shows high quality and efficiency, and it can completely guarantee the condenser of the circulating cooling water system of a thermal power plant in Shenyang, the stable and safe operation of the generator set, and also shows some advantages in the economic benefit.

【學位授予單位】：西南交通大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：X703;TM621

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