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爆炸性粉尘环境的渣浆泵电机选择
添加时间:2019.11.30

爆炸性粉尘环境的渣浆泵电机选择

连续出现或长期出现爆炸性粉尘环境的危险区为10区,有时会将积留下的粉尘物扬起而偶然出现爆炸性粉尘混合物的环境危险区为11区。

爆炸性粉尘环境内的电气设备和线路,应符合周围环境内化学的、机械的、热的、霉菌以及风沙等不同环境条件对电气设备的要求。

在爆炸性粉尘环境内,电气设备最高允许表面温度应符合表5-17的规定。

防爆电气设备选型:除可燃性非导电粉尘和可想纤维的11区环境采用防(标志DP)的粉尘防爆电气外,爆炸性粉尘环境10区及其他爆炸性粉尘环境11区均需采用尘密结构(标志为DT)的粉尘防爆电气设备,并还需按照粉尘的不同引燃温度选择不同引燃温度组别的电气设备。
(4)火灾危险环境的电机选择
    火灾危险环境的电气设备应符合周围环境内化学的、机械的、热的、霹菌及凤沙等环境条件对电气设备的要求。
    在火灾危险环境内,应根据区域等级和使用条件选择电机的防护结构:
    固定安装式: 21区内:IP44,但对有滑环等有火花部件的电机不宜采用;
               22区内:IP54;
               23区内:IP21 但对有火花部件的电机应采用IP44

移动携带式:都采用IP54
(5)增安型防爆电机的应用    增安型防爆电机 YA型是Y系列电机的一个派生系列。其安装尺寸与Y系列电机基本并符合IEC(国际电工委员会)EN(欧洲标准)的要求。主林外房护李级为1s54并增加了轻微腐蚀的防护,安装维护方便,价格较低, 所以在石化行业、泵行业中得到了广泛使用。 渣浆泵

Motor selection of slurry pump in explosive dust environment

Zone 10 is the dangerous area where explosive dust environment appears continuously or for a long time, and zone 11 is the dangerous area where explosive dust mixture may occur occasionally due to the raising of accumulated dust.

安徽快3开奖结果The electrical equipment and circuits in the explosive dust environment shall meet the requirements of different environmental conditions such as chemical, mechanical, thermal, mold and sand。

In explosive dust environment, the maximum allowable surface temperature of electrical equipment shall meet the requirements of table 5-17.

Selection of explosion-proof electrical equipment: in addition to the dust explosion-proof electrical equipment with dust-proof structure (marked as DP) in the 11 area environment of combustible non-conductive dust and conceivable fiber, the dust explosion-proof electrical equipment with dust-proof structure (marked as DT) shall be used in the 10 area of explosive dust environment and other 11 area of explosive dust environment, and the electrical equipment with different ignition temperature groups shall be selected according to the different ignition temperature of dust Equipment.

(4) motor selection in fire hazard environment

Electrical equipment in fire hazard environment shall meet the requirements of chemical, mechanical, thermal, thunderbolt and fengsha environmental conditions on electrical equipment in the surrounding environment。

In the fire hazard environment, the protection structure of the motor shall be selected according to the area level and service conditions:

Fixed installation type: IP44 is used in zone 21, but it is not suitable for motors with spark parts such as slip rings;

In zone 22: IP54;

Zone 23: IP21 is used, but IP44 is used for motors with spark parts.

Portable: IP54 is adopted.

(5) application of increased safety explosion-proof motor type Ya is a derivative series of Y series motor. Its installation dimensions are basically the same as those of Y-series motors, and meet the requirements of IEC (International Electrotechnical Commission) and en (European standard). The protection grade of main forest house is 1s54 and the protection of "slight corrosion" is added, which is convenient for installation and maintenance and low in price, so it is widely used in petrochemical industry and pump industry. Slurry pump







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