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                    氧化鋁分解槽降溫裝置
                    氧化鋁分解槽降溫熱管換熱器
                    高頻電阻焊螺旋翅片管
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                    氧化鋁分解槽

                    分級降溫的節能設備

                    NJKC-101型風冷水冷一體式熱管換熱器

                    氧化鋁生產企業,氧化鋁分解槽的分級降溫,多年來一直采用寬流道不銹鋼板式換熱器,配備渣漿泵送料漿進入板式換熱器,經與循環冷卻水對流換熱實現降溫,一條生產線安裝六臺套,方可解決料漿降溫要求。夏季氣溫偏高時,冷卻循環水溫隨之升高,降溫效果仍難滿足生產工藝要求。

                    新裝板式換熱器初期運行換熱降溫效果較好,運行中由于板片逐步產生結疤、堵塞,每年需停用5-6次進行專業清洗,換熱降溫效果仍逐步下降,且易磨損洞穿、維護、維修費用大,5-6年即行報廢。與之配套的渣漿泵極易磨損,每年維修費用幾近一臺新泵費用。渣漿泵運行功率132KW/臺套,單條生產線6臺套,按載荷90%計算,每小時耗電能約700度,每天16800度,每年6132000度。

                    綜上所述,板式換熱器+渣漿泵作為分解槽分級降溫設備,運行耗能大,易結疤堵塞,易損壞,維護保養頻繁,維修費用高。一直是困擾氧化鋁生產企業的一道難題。

                    南京科臣節能設備有限公司經多方實驗,研制成功NJKC-101型風冷水冷一體式熱管換熱器(發明名稱:氧化鋁分解槽降溫熱管換熱器,專利號:ZL201110210358.3),應用于氧化鋁分解槽分級降溫生產工藝流程中,新型熱管換熱器運行中不用渣漿泵,無電力損耗,只需供給循環冷卻水,水壓0.3Pa~0.4Pa即可,降溫效果優異,運行可靠,無需維修,維護保養簡易,使用壽命在6-8年以上。與板式換熱器相比較,節省渣漿泵電力100%。

                    采用新型熱管換熱器為氧化鋁分解槽分級降溫,可為氧化鋁生產企業節省大量電能和維修費用,大幅提升生產效率和經濟效益。

                    熱管換熱器是通過以下技術方案來實現的:

                    在分解槽頂部切割長方孔,將適當數量安裝支架放入,焊牢于頂部承重構架之上。在框架上安裝熱管換熱器,熱管換熱器的冷卻段安裝循

                    環冷卻水進水接口和出水接口。熱管換熱器的受熱段伸入到分解槽內的料漿中,吸收熱量,通過熱管換熱器內的工作介質蒸發上下循環將熱量傳導至熱管換熱器上部冷卻段,再經與循環冷卻水熱交換,將熱量帶走排放,即實現了為分解槽內的料漿降溫,通過增減冷卻水流量即可控制降溫幅度,達到實際工藝要求。 見圖1:熱管受熱段吸收熱量,并將熱量傳給工質(液態),工質吸熱后以沸騰與蒸發的形式轉變為蒸汽,蒸汽在壓差作用下上升至放熱段,同時凝結成液體放出汽化潛熱,熱量傳給放熱段的冷流體(循環冷卻水),冷凝液依靠重力回流到受熱段。由于熱管內腔抽成高度真空,所以工質極易沸騰蒸發,起動迅速熱傳輸效率高,熱管單根獨立工作,無需借助外部動力,所以熱管運行無動力損耗。

                    圖2 熱管換熱器安裝及供排水示意圖

                    圖3 熱管換熱器在氧化鋁分解槽頂板上的安裝分布

                    按此圖可布置熱管換熱器210件,根據各級分解槽降溫要求不同,決定安裝數量(各級分解槽的安裝數量在140件以上,210件以下)。

                    氧化鋁分解槽安裝應用熱管換熱器正常運行必備條件和維護保養要求:

                    1、槽頂供水主管道必須安裝一臺袋式濾清器,出水口安裝兩側分控閘閥。定期清洗更換濾袋,可保證熱管上部冷卻水通道不瘀堵,冷卻水暢通無阻。

                    2、循環冷卻水蓄水池補水管道必須(前置)安裝一臺軟水處理器(軟水處理器設備投資約5萬元,每小時可將30噸井水或自來水轉化成軟水,每天運行損耗費用約30元),可杜絕冷卻水通道內產生水垢和結疤,免清洗。

                    3、正常給水運行時,必須每槽每班交替停供冷卻水30分鐘。另每槽每隔15天(錯日、錯時)交替停供冷卻水24小時。照此操作辦理,可徹底解決熱管受熱段(伸入料漿部分)會產生結疤的難題,可保證熱管換熱器長期高效運行,無需停槽清洗結疤,免維修。

                    南京科臣節能設備有限公司多年來專業生產熱管及熱管換熱器節能產品及設備,積累了各行業應用熱管及熱管換熱器產品節能降耗的豐富經驗。公司可為客戶設計、制造、指導安裝、調試。

                    歡迎氧化鋁企業安裝試用,驗證實效,緩付貨款。 科臣公司該產品尋求合作單位共同開發、生產經營。

                    Energy-saving Equipment -- Stepped Cooling Equipment for Decomposition Tank of Alumina Refinery

                    NJKC-101 Air-cooling and Water-cooling Integrated Heat Pipe Exchanger

                    Alumina refineries have always been adopting broad-flow stainless steel plate heat exchanger for many years for stepped cooling of decomposition tank, with slurry pump equipped for delivering slurry into plate heat exchanger, so as to realize cooling by heat convection with circulating cooling water. Each production line is equipped with 6 sets.

                    Service rating of slurry pump is 132KW per set. Each production line is equipped with 6 sets, and the consumption of electric energy is about 700 degrees per hour, 16800 degrees per day and 6132000 degrees per year as per calculation of 90% load.

                    As traditional cooling equipment, plate heat exchanger and slurry pump consume high energy, and are easily subjected to scab, jam and damage as well. Thus, it requires frequent maintenance and high maintenance costs.

                    Through many experiments, Nanjing Kechen Energy Saving Equipment Co., Ltd has successfully developed NJKC-101 Air-cooling and Water-cooling Integrated Heat Pipe Exchanger (title of invention: Cooling Heat Pipe Exchanger for Alumina Refinery Decomposition Tank, patent number: ZL201110210358.3), which is applied in production process of stepped cooling of decomposition. This new type of heat exchanger requires no slurry pump without power loss during running. It only needs circulating cooling water with hydraulic pressure of 0.3Pa~0.4Pa, then bringing you the outstanding cooling effect, reliable operation and zero maintenance. It is easy to conduct maintenance and the life span of this heat pipe exchanger is more than

                    6 to 8 years. Compared with plate heat exchanger, it can save 100% slurry pump electric power. As shown in figure 1, heat pipe absorbs heat by hot arc and delivers heat to working fluid (liquid). After working medium has absorbed heat, it will transform into vapor in the form of boiling and evaporation. Under the effect of differential pressure, vapor goes up to cold side and coagulates into liquid, releasing latent heat of vaporization. Then heat passes on to the cold fluid (circulating cooling water) in cold side. Condensed fluid back flows to hot side by gravity. Since the lumen of heat pipe has been pumped to high vacuum, working fluid is rather liable to boil and evaporate. With quick starting,

                    high-efficient heat transport and independent work of heat pipe, the running of heat pipe has no power loss without virtue of external power.

                    Figure 2: Diagram of Heat Pipe Exchanger Installation and Water Supply and Drainage

                    Figure 3: Installation of Heat Pipe Exchanger on the Top Plate of Decomposition Tank

                    As shown in this figure, 210 sets of heat pipe exchangers can be installed. Installation amount is decided according to different cooling requirement of all levels of decomposers (the installation amount for decomposers at all levers is more than 140 pieces but less than 210 pieces).

                    Heat pipe exchanger for decomposition tank in normal production operation can reach the result of being free from clean, maintenance, incrustation and scab.

                    版權所有:南京科臣節能設備有限公司 技術支持:南京搜啟信息技術有限公司
                    公司地址:江蘇省南京市棲霞經濟開發區    電話:025-85700138 
                    備案序號:蘇icp備06038645號