本文選題：金屬加工液 + 凈化再生��； 參考：《大連交通大學(xué)》2015年碩士論文

【摘要】：目前,國內(nèi)外切削加工方法對環(huán)境造成的污染污染仍然很大。非傳統(tǒng)的干切削、噴氣冷卻和液氮冷卻干式加工是主要加工方式,干加工方式既有有點也有缺點,因此離全面取代水基切削液的濕式加工還相當(dāng)遙遠(yuǎn),高性能綠色環(huán)保型水基金屬切削液的開發(fā)仍具有重要的意義。盡管處理金屬加工液廢液的方法有很多并且已趨于成熟,但這些方法無一例外地造成金屬加工液中大量有效成分的損失,研究一種對處理成本低、節(jié)能減排且對人類無害、對環(huán)境友好的處理方法具有重要意義。針對金屬加工液失效原因,調(diào)查分析后設(shè)計研發(fā)了金屬加工液凈化再生設(shè)備。既能降低了廢水處理成本,又節(jié)能減排,更對環(huán)境保護(hù)做出了貢獻(xiàn),一舉三得。金屬加工液凈化再生主要分為來水調(diào)節(jié)系統(tǒng)、溶氣釋氣系統(tǒng)、臭氧紫外殺菌系統(tǒng)、共凝聚氣浮系統(tǒng)和排水排渣系統(tǒng),其中溶氣釋氣系統(tǒng)先使用臭氧后使用空氣做溶氣;共凝聚氣浮系統(tǒng)為二級氣浮,一級分離區(qū)與二級分離區(qū)分別對應(yīng)兩套混凝劑加藥管線;殺菌方式為臭氧殺菌與紫外殺菌聯(lián)合作用。金屬加工液凈化再生設(shè)備在調(diào)試期連續(xù)進(jìn)水運行,控制金屬加工液進(jìn)水流量為600L/h,循環(huán)周期為1小時。溶氣系統(tǒng)中臭氧或空氣進(jìn)氣量為7%,總?cè)軞馑M(jìn)水量在350L/h左右,其中一級分離區(qū)210L/h,二級分離區(qū)140L/h;溶氣泵處壓力調(diào)節(jié)為0.5MPa;設(shè)備循環(huán)運行5小時,每循環(huán)一次即每隔一小時取一次水樣,通過檢測加工液pH、電導(dǎo)率、COD、細(xì)菌總數(shù)、含油量、固體懸浮物等指標(biāo),確定設(shè)備最佳循環(huán)時間為2小時。金屬加工液凈化再生設(shè)備循環(huán)凈化2小時后:出水PH穩(wěn)定在8.5左右;在凈化過程中,加工液電導(dǎo)率幾乎穩(wěn)定不變;出水COD損失率小于10%;殺菌率可達(dá)到99.6%;出水含油量去除率達(dá)到90%以上;出水懸浮物去除率達(dá)95%;過濾性能遠(yuǎn)優(yōu)于原水;出水顏色為原本白色變?yōu)槿榘咨?難聞的臭味也消失。凈化再生后金屬加工液貯存安定性、pH值、消泡性、防腐蝕性和防銹等性能經(jīng)國標(biāo)法測試滿足GB6144-85。實驗結(jié)果表明用“二級混凝氣浮分離技術(shù)+臭氧紫外殺菌”技術(shù)凈化金屬加工液的方法具有可行性,以此方法設(shè)計研發(fā)的金屬加工液凈化再生設(shè)備凈化后出水達(dá)標(biāo),證明設(shè)備有效。
[Abstract]:At present, the environmental pollution caused by cutting and processing methods at home and abroad is still very large. Non-traditional dry cutting, jet cooling and liquid nitrogen cooling are the main processing methods. Dry machining has both some and some disadvantages, so it is far away from the wet machining, which completely replaces the water-based cutting fluid. The development of high performance green environmental-friendly water-based metal cutting fluid is still of great significance. Although there are many and mature methods to treat metal working liquid waste, without exception, these methods have caused the loss of a large number of active components in metal working fluid, and a research on the treatment of low cost, energy saving and emission reduction is not harmful to human beings. Environmental friendly treatment is of great significance. According to the failure reason of metal working fluid, the purification and regeneration equipment of metal working fluid was designed and developed after investigation and analysis. It can not only reduce the cost of wastewater treatment, but also save energy and reduce emissions. The purification and regeneration of metal processing liquid is mainly divided into water regulation system, dissolved gas release system, ozone ultraviolet sterilization system, co-condensed air floatation system and drainage and slag drainage system, in which the dissolved gas release system first uses ozone and then uses air as dissolved gas. The cocondensed air floatation system consists of two sets of coagulant pipeline corresponding to the primary separation zone and the secondary separation zone respectively, and the bactericidal method is the combination of ozone sterilization and ultraviolet sterilization. The metal working fluid purifying and regenerating equipment runs continuously in the commissioning period. The flow rate of the metal working fluid is 600L / h and the cycle period is 1 hour. The ozone or air intake in the dissolved gas system is 7. The total water intake of dissolved gas is about 350L/h, in which the primary separation zone is 210 L / h and the secondary separation zone is 140 L / h; the pressure at the dissolved gas pump is adjusted to 0.5 MPA; the equipment circulates for 5 hours. Water samples are taken once every cycle and every other hour. By detecting pH of processing fluid, conductivity of COD, total number of bacteria, oil content, solid suspended matter and so on, the optimum cycle time of the equipment is determined to be 2 hours. After 2 hours of recycling purification of metal processing fluid purification and regeneration equipment, the PH of effluent was stable at about 8.5, and the conductivity of processing fluid was almost stable in the process of purification. The COD loss rate of the effluent is less than 10; the bactericidal rate can reach 99.6; the removal rate of the oil content in the effluent reaches more than 90%; the removal rate of the suspended substance in the effluent reaches 95%; the filtration performance is far better than that of the raw water; the color of the effluent is originally white to milky white, and the bad odor also disappears. The storage stability, defoaming, corrosion resistance and rust resistance of the purified and regenerated metal working fluid were tested by GB 6144-85 by GB 6144-85. The experimental results show that it is feasible to purify metal processing liquid by using "secondary coagulation and air flotation separation technology ozone ultraviolet sterilization" technology. Prove that the equipment is valid.
【學(xué)位授予單位】：大連交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：X76

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本文編號：1818630