食品機械中泵的材料和結(jié)構(gòu)該怎樣選擇

來源：巴特計量泵、齒輪泵公司發(fā)布時間：2013-11-13 14:33:53 瀏覽次數(shù)：次

　　How to choose the fluid treatment system of modern food processing device of the pump, design personnel and the equipment operators and managers face a variety of health related responsibility, the responsibility has been beyond the scope of common industrial products manufacturing. As consumers of the final products are public, product contamination must be avoided, corrosion is not allowed, pump and piping system can cause fluid retention and the breeding of bacteria of the cracks and dead is not acceptable.

　　除了材料選擇和加工過程中食品接觸面的選擇之外，食品工業(yè)還必須選擇系統(tǒng)維護時，用于輸送酸性和堿性清洗流體的管線和儲罐設備，以及選擇滿足各種環(huán)境標準的使用腐蝕性化學品進行污水處理的設備。

　　In addition to the choice of food contact material selection and processing, food industry has to choose the system maintenance, for delivery of acidic and alkaline cleaning fluid pipelines and storage equipment, and can meet the use of chemicals corrosive environmental standards for sewage treatment equipment.

　　食品應用中要求的泵，其制造材料不能與產(chǎn)品發(fā)生化學反應或者以任何方式影響產(chǎn)品味道、顏色和其他特點。非食品接觸流體設備設計因素包括減少維修和停車時間、增加產(chǎn)量和降低成本等，還有與供貨商知識和服務有關(guān)的很多難以確定的因素。

　　Food requirements of the application of pumps, their material should not react chemically with the products or in any way affect product taste, color and other characteristics. Non food contact fluid equipment design factors which reduce the repair and parking time, increase yield and reduce the cost, there are a lot of related knowledge and service suppliers to determine the factors.

　　一種用途引起另一種用途

　　A use by another application

　　人們對塑料泵的興趣開始于50多年前，當時制造了一種Vanton撓性線型螺狀旋轉(zhuǎn)泵以滿足心臟/肺手術(shù)中對泵的嚴格要求。這種原始泵獨特但簡單的結(jié)構(gòu)限制流體只接觸兩個基本部件：固體塑料泵體和粗糙的合成橡膠模制襯里。它解決了與無污染處理人體血液或者影響血液相關(guān)的兩個主要問題。首先，它避免了金屬污染的所有危險，因為接觸材料對血液不產(chǎn)生污染或者與之發(fā)生化學反應。其次，它柔和的運動在血液輸送過程中也不損害血液細胞。這種泵被接受的另一個原因是其結(jié)構(gòu)的簡單。它不包含閥門、密封、填料或者墊片。其拆卸清洗和再組裝簡單快捷。

　　People interested in plastic pump began 50 years ago, when making a Vanton flexible linear spiral rotary pump to meet the heart / lung operation of pump in the strict requirements. This unique original pump but simple structural constraints fluid contacts only the two basic components: solid plastic pump body and rough synthetic rubber molded lining. It solves the pollution-free treatment with human blood or blood related effects of two main problems. First, it avoids all the dangerous metal pollution, because contact materials on the blood does not produce pollution or chemical reaction with. Secondly, it sports a soft in the blood does not harm the process of blood cells. Another reason for this pump is accepted is its simple structure. It does not contain the valve, sealing, packing and gasket. The demolition and re cleaning quick and easy assembly.

　　此后，在化學材料制造商巨頭像杜邦、道爾、Atofina和其他化學公司的幫助下，新的領(lǐng)域被開拓了。他們在開發(fā)用于處理腐蝕化學品：酸、堿、鹽、溶劑等的大范圍熱塑料材料上走在前列。

　　Since then, the chemical material manufacturer giants like DuPont, Doyle, Atofina and other chemical company's help, the new field was opened. They used to deal with corrosion in the development of chemicals: wide range of thermoplastic materials acid, alkali, salt, solvent and so on in the forefront.

　　前進中的技術(shù)

　　Advance in technology

　　泵的設計者把這些新材料結(jié)合到成本-效率泵的設計中來，滿足不斷擴大的加工工業(yè)的需求。今天大約有150000臺這種撓性線型泵——總能力為40GPM——在美國使用，而且在歐洲大約有一倍數(shù)量的泵在使用。除了需要用這些熱塑料旋轉(zhuǎn)螺狀泵在低流速到中流速條件下來處理大范圍敏感并有腐蝕性的流體外，為了處理化學品、食品、藥品和相關(guān)工藝和工業(yè)企業(yè)所要求的更高輸送流量，對非金屬泵的要求是采用新的結(jié)構(gòu)。泵制造商們回應了這一要求。

　　Designer pumps put into these new materials design cost - efficiency of pump in, meet the growing demand for the processing industry. Today there are about 150000 of the flexible linear pump -- total capacity of 40GPM -- used in the United States, and approximately doubled the number of pump in use in europe. In addition to the flow conditions at low flow rates using these thermal plastic rotating spiral pump down to handle a wider range of sensitive and corrosive fluid, in order to deal with the chemical, food, pharmaceutical and related technology and industrial companies are demanding higher transport flow, the non metal pump is a new structure. Pump manufacturers to respond to this request.

　　熱塑料離心泵設計目前能獲得的形式有臥式和立式結(jié)構(gòu)，可用于流量達1500GPM、揚程達400ft，在溫度為275°F或者稍高時可以連續(xù)或間斷使用。他們可以以符合ANSI工藝泵標準的型號布置，可以布置在電磁驅(qū)動無密封機構(gòu)和自動啟動裝置中。立式泵有干運行的能力，并且有獨特的分段軸結(jié)構(gòu)其允許長度為50ft。所有的這些類型都可用于食品工業(yè)，因為其設計和結(jié)構(gòu)沒有金屬組件接觸流體。

　　Design of thermal plastic centrifugal pumps available in the form of horizontal and vertical structure, can be used for flow rate up to 1500GPM, head of 400ft, at a temperature of 275 ° F or slightly high can be continuous or intermittent use. Layout models they can to comply with the ANSI process pump, can be no sealing mechanism and automatic starting device is arranged in the electromagnetic drive. Vertical pumps have run dry capability, and has the unique structure of the sectional axis the permitted length for 50ft. All of these types can be used in the food industry, because of its design and structure fluid does not contact the metal components.

　　典型應用

　　Typical applications

　　粘稠芥末和清醋

　　Viscous mustard and vinegar

　　撓性線型螺狀旋轉(zhuǎn)泵允許它處理清澈和6000SSU的粘稠流體、淤漿和有小顆粒的均勻流體。在這種裝置中，清醋以地面液位儲存，然后用泵打入地板上方的一個儲罐。然后它因重力流入配料罐，往配料罐中加芥末籽和鹽。這些混合配料排入一個攪拌/混合罐，制成的芥末產(chǎn)品被泵打入一個料斗并裝入移動著的輸送帶上的瓶子中。

　　Flexible linear shaped rotary pump Lo allow it to deal with the viscous 6000SSU clear and fluid, slurry and small particles have uniform fluid. In this device, clear vinegar to ground level storage, and then use the pump into the top floor of a storage tank. And it is because of gravity flow of ingredients cans, cans of ingredients to add mustard seeds and salt. These mixed ingredients into a mixing / mixing tank, conveyor belt on the bottle made of mustard products are pumped into a hopper and into the moving in.

　　August Barer & Sons公司安裝的泵要求在50PSI的壓力和粘度為5000SSU的條件下能處理的流量為10GPM。只有兩個部件接觸了腐蝕性流體。它們都是塑料。較厚部分的聚丙烯泵體的壽命是無限的，因為它不與食品發(fā)生反應而且其光滑的內(nèi)部也減少了磨損。合成橡膠撓性襯里也不與食品發(fā)生反應但是襯里皺曲會抽去產(chǎn)品的一部分，特別是流體中含有研磨粉時。該公司提供的一份服務報告說，處理清醋的這種泵在其運行的前20年只需要更換一次襯里。盡管處理粘稠芥末的泵要求定期并按計劃更換襯里，這種工作可以在現(xiàn)場用幾分鐘完成，而不需要特殊工具。

　　August Barer & Sons, installation of the pump requires 50PSI pressure and viscosity of treatment to 5000SSU under the conditions of flow rate of 10GPM. Only two parts in contact with the corrosive fluid. They are all plastic. The thicker part of the life of polypropylene pump body is infinite, because it does not react with food and its smooth interior also reduces wear and tear. Flexible synthetic rubber lining does not react with food but a part of the song will be lining wrinkle removing product, especially when the fluid contains abrasive powder. A service report provided by the company said, this pump clear vinegar treatment at 20 years ago the only need to replace a liner. Although the pump requires processing viscous mustard regularly and according to plan to replace the lining, this work can be accomplished in a few minutes in the field, without the need for special tools.

　　奶制品加工及其環(huán)境

　　在奶制品比如牛奶、奶油、酸奶、冰淇淋、豆腐、果汁和很多甜食的生產(chǎn)中，很多用于洗滌設備的腐蝕性化學品的處理在很多方面類似于整個工業(yè)界對這些化學品的處理。排放到空氣中或者當?shù)厮到y(tǒng)或廢水系統(tǒng)中的污物應符合環(huán)境規(guī)范的要求，注意這一點也是非常重要的。這些就要求必須仔細選擇結(jié)構(gòu)和制造材料以保證這些泵能抵抗流體的腐蝕和磨蝕特性，并且這些流體在使用之后能夠被徹底排放，還要保證清洗工作結(jié)束之后不污染它們所處理的食品。

　　Tuscan Dairies是一家美國的較大的地區(qū)奶制品加工商，要求每天的生產(chǎn)結(jié)束之后要進行清洗。Tuscan的標準步驟要求洗滌流體處理系統(tǒng)并且拆卸、清洗、再安裝所使用的設備。這個過程因使用強堿和強酸溶液以及各種化學品在廢液流入廢水系統(tǒng)之前進行中和而加快。撓性線型泵非常適合于把各種化學品輸送到儲罐并把它們從這些儲罐中排掉?？捎糜谶@種襯里的合成橡膠材料有7種，可用于泵體的材料有4種。

　　蘇格蘭的一家現(xiàn)代乳制品廠在符合當?shù)厮畽C構(gòu)要求方面面臨著各種問題。這些問題的產(chǎn)生是因為廢水處理系統(tǒng)有稀硫酸的注入以幫助廢牛奶/廢水凝結(jié)。這對廢液pH值的調(diào)節(jié)和控制要求非常嚴格。英國的工藝設計公司Steill是這樣解決該奶制品廠的問題的：

　　為了保證對所用的化學品腐蝕性的徹底抵制，所有接觸流體的泵組件都使用均質(zhì)聚丙烯，因為與它不發(fā)生化學反應的pH值范圍很大。

　　對于水/牛奶和硫酸的處理，要求泵能滿足Vanton立式離心泵Sump-Gard的規(guī)定，該泵有熱塑料排水立管并有相同材質(zhì)的加強條。泵殼體、殼體蓋和葉輪由純聚丙烯模制而成。沉軸承包括陶質(zhì)內(nèi)套筒和Teflon或陶質(zhì)外套筒。不銹鋼軸的套筒采用相同材質(zhì)。

　　對于處理過的廢液，對泵的要求是要滿足Vanton立式離心泵Sump-Gard的規(guī)定，該泵的殼體、殼體蓋、法蘭和葉輪都由均質(zhì)聚丙烯模制而成，驅(qū)動軸承座敞開的密封區(qū)域很大以便簡化維修，而且有一個可收縮的前部軸承以使軸的懸垂部分和變形降到低。

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