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從輸送介質(zhì)性質(zhì)選擇渣漿泵的型式
(1) 常溫清水:一般的離心泵都可以使用。
(2) 石油及石油制品:因石油、液化石油、石油制品都屬易燃、易爆物質(zhì)，所以要求泵的密封性好、可靠性高，一般應(yīng)選擇各類油泵、流程泵等，油泵的吸入、吐出口都垂直向上，較適合于煉油及石化工藝流程的需要。
(3) 化工腐蝕性液體:對(duì)有機(jī)、無(wú)機(jī)、酸、堿類化工產(chǎn)品液體的輸送應(yīng)選用化工耐腐蝕泵，化工耐腐蝕泵一般選用各種耐腐蝕的材料制成。
(4) 污水:污水中一般都含有一定的懸浮物或纖維物，容易堵塞泵的流道，尤其生活污水、糞便等應(yīng)選用污水泵。有的污水還有一定的腐蝕性，泵的材料應(yīng)采用耐腐蝕材料。
(5) 含灰渣、渣漿、泥漿、砂粒的液體:此類液體對(duì)泵流道有極大的磨蝕性，所以泵的流道應(yīng)采用耐磨蝕材料，或用耐磨蝕材料、橡膠等材料襯里的灰漿泵、渣漿泵、泥漿泵、砂泵等雜質(zhì)泵。
(6)高溫液體:高溫液體一般壓力也較高，并有熱膨脹的影響，強(qiáng)度要求高，密封較困難等，對(duì)泵的結(jié)構(gòu)有一定的要求，例對(duì)泵體要求采用徑向剖分(T>205C)， 水平中心線支承(T>177C)，需要有必要的冷卻系統(tǒng)。當(dāng)溫度T> 175C時(shí)不能用鑄鐵材料。所以高溫液體應(yīng)選擇熱水循環(huán)泵、鍋爐給水泵或熱油泵等耐高溫高壓的泵。
四、從用途選擇泵的型式
(1)鍋爐給水泵:鍋爐給水一般為高溫高壓水的輸送，所以專門設(shè)計(jì)了鍋爐給水泵系列。根據(jù)輸送溫度壓力不同，有低壓、中壓、次高壓、高壓鍋爐給水泵之分，可根據(jù)不同的溫度和壓力選取不同類型的鍋爐給水泵。
(2) 冷凝泵:是專門用來(lái)供電廠凝汽器熱水井的冷凝水之用，它要求泵的汽蝕性能較高，并常用汽蝕方法來(lái)調(diào)節(jié)泵的流量，所以專門設(shè)計(jì)了冷凝泵系列。
(3)井泵:用于井中提水，泵的外形受到井徑的限制，所以專門設(shè)計(jì)了細(xì)長(zhǎng)型的井泵。井泵有兩種:一種是將原動(dòng)機(jī)置于地面的深井泵，另一種是將電機(jī)和泵連成一體置于井水中的潛水電泵。
(4)食品泵:輸送液體食品，如酒類、牛奶、果汁等，需無(wú)毒不銹及易清洗等特點(diǎn)，所以應(yīng)選用專門輸送食品之用的食品泵。
(5)船用泵:因船上受空間的限制，所以專門設(shè)計(jì)了適合于船上安裝使用的船用泵，其大多數(shù)為立式結(jié)構(gòu)。
(6)紙漿泵:紙漿中既含有固體顆粒，又含有纖維的混合液體，極容易堵塞泵的流道，所以設(shè)計(jì)了適合紙漿輸送的紙漿泵，它也可以用來(lái)輸送泥漿、灰渣、糞便等。 渣漿泵廠家
Selecting the type of slurry pump from the properties of the conveying medium
(1) normal temperature clean water: General centrifugal pump can be used.
(2) Petroleum and petroleum products: since petroleum, liquefied petroleum and petroleum products are inflammable and explosive substances, the pumps are required to have good sealing performance and high reliability. Generally, all kinds of oil pumps and process pumps should be selected. The suction and discharge outlets of oil pumps are vertical upward, which is more suitable for the needs of oil refining and petrochemical process.
(3) chemical corrosive liquid: for the transportation of organic, inorganic, acid and alkali chemical product liquid, chemical corrosion-resistant pump shall be selected, which is generally made of various corrosion-resistant materials.
(4) sewage: the sewage generally contains certain suspended matter or fiber, which is easy to block the flow channel of the pump, especially the domestic sewage, feces and so on. Some sewage has a certain degree of corrosiveness. The pump material should be corrosion-resistant.
(5) liquid containing ash, slurry, mud and sand: this kind of liquid has great abrasiveness to the flow passage of the pump, so the flow passage of the pump shall be made of wear-resistant materials, or the slurry pump, slurry pump, mud pump, sand pump and other impurity pumps lined with wear-resistant materials, rubber and other materials.
(6) high temperature liquid: high temperature liquid generally has high pressure, and has the effect of thermal expansion, high strength requirements, difficult sealing, etc., which has certain requirements on the structure of the pump. For example, the pump body is required to adopt radial split (T > 205C), horizontal center line support (T > 177c), and necessary cooling system is required. Cast iron material cannot be used when temperature T > 175C. Therefore, hot water circulating pump, boiler feed pump or hot oil pump shall be selected for high temperature liquid.
IV. select the type of pump from the purpose
(1) boiler feed pump: the boiler feed water is generally high temperature and high pressure water transmission, so the boiler feed pump series is specially designed. According to different transmission temperature and pressure, there are low pressure, medium pressure, sub high pressure and high pressure boiler feed pumps. Different types of boiler feed pumps can be selected according to different temperature and pressure.
(2) condensate pump: it is specially used for the condensate of the hot water well of the condenser in the power plant. It requires high cavitation performance of the pump, and commonly uses cavitation method to regulate the flow of the pump, so the condensate pump series is specially designed.
(3) well pump: it is used to lift water in the well. The shape of the pump is limited by the well diameter, so a slim well pump is specially designed. There are two kinds of well pumps: one is the deep well pump with the prime mover on the ground, the other is the submersible pump with the motor and the pump integrated in the well water.
(4) food pump: to transport liquid food, such as alcohol, milk, fruit juice, etc., it is required to be non-toxic, rust free and easy to clean. Therefore, it is necessary to select a special food pump for conveying food.
(5) marine pump: due to the limitation of space on the ship, the marine pump suitable for installation and use on the ship is specially designed, most of which are vertical structures.
(6) pulp pump: the pulp contains both solid particles and fiber mixed liquid, which is easy to block the flow channel of the pump, so a pulp pump suitable for pulp transportation is designed, which can also be used to transport mud, ash, feces, etc Slurry pump manufacturer
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