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化工泵应该怎么选则?
添加时间:2020-1-11 10:03:20

在一个当代生产系统中合理的选定装备是能有效的加速事情服从,反之则会影响到生产服从,而化工泵作为处分化工的一种装备,再加上我们对情况保护认识的不断增加,化工泵选型更显得重要了。那接下来我就为大家介绍一下化工泵选型要留意甚么吧。

一、化工泵选型原则

1、使所选泵的型式和机能合乎装置流量、扬程、压力、温度、汽蚀流量、吸程等工艺参数的要求。

2、必须满足介质特征的要求。

3、对输送易燃、易爆有毒或宝贵介质的泵,要求轴封可靠或采用无泄漏泵,如磁力驱动泵、隔阂泵、屏蔽泵。

对输送侵蚀性介质的泵,要求对流部件采用耐侵蚀性材料,如AFB不锈钢耐侵蚀泵,CQF工程塑料磁力驱动泵。

对输送含固体颗粒介质的泵,要求对流部件采用耐磨材料,必要时轴封用采用洁净液体清洗。

二、化工泵选型依据

1. 流量是选泵的重要机能数据之一,它干脆关系到全部装置的的生产才气和输送才气。 如计划院工艺计划中能算出泵平常、非常小、非常大三种流量。选定泵时,以非常大流量为依据,两全平常流量,在没有非常大流

时,通常可取平常流量的1.1倍作为非常大流量。

2. 装置系统所需的扬程是选泵的又一重要机能数据,普通要用扩大5%-10%余量后扬程来选型。

3. 液体性质,包含液体介质称号,物理性质,化学性质和其它性质,这涉及到系统的扬程,有效气蚀余量计较和合适泵的类型,选用泵材料和选用那一种轴封型式等

In a modern production system, the reasonable selection of equipment can effectively accelerate the obedience of things, otherwise it will affect the obedience of production. As a kind of equipment for disposing chemical industry, chemical pump selection is more important with our increasing understanding of situation protection. Then I will introduce what should be paid attention to when selecting chemical pump.


1、 Selection principle of chemical pump


1. Make the type and function of the selected pump meet the requirements of process parameters such as unit flow, head, pressure, temperature, cavitation flow and suction head.


2. It must meet the requirements of medium characteristics.


3. For pumps conveying inflammable, explosive, toxic or precious media, the shaft seal shall be reliable or leakage free pumps shall be used, such as magnetic drive pumps, barrier pumps and shield pumps.


For the pump conveying corrosive medium, it is required that the convection parts shall be made of corrosion-resistant materials, such as AFB stainless steel corrosion-resistant pump and CQF engineering plastic magnetic drive pump.


For the pump conveying the medium containing solid particles, it is required that the convection parts shall be made of wear-resistant materials, and if necessary, the shaft seal shall be cleaned with clean liquid.


2、 Selection basis of chemical pump


1. The flow rate is one of the important functional data of the pump, which is simply related to the production ability and transportation ability of all units. For example, the process plan of the planning institute can calculate the normal, very small and very large flow of the pump. When selecting the pump, it is based on the very large flow, and the two flows are normal, and there is no very large flow


Usually, 1.1 times of normal flow can be taken as very large flow.


2. The head required by the device system is another important function data of the pump selection, which is usually selected by expanding the head after 5% - 10% margin.


3. Liquid property, including liquid medium title, physical property, chemical property and other properties, which involves system head, effective cavitation allowance calculation and appropriate pump type, pump material and shaft seal type, etc