Rotary vane vacuum pump in the application of polyester chemical fiber raw material to produce -

rotary vane vacuum pumps in phthalate phthalate ( PTA) The application is one of the important raw materials of polyester and chemical fiber. With the development of China polyester chemical fiber, in order to meet the growing demand for PTA, in order to satisfy the phthalate device the vacuum degree required, successively introduced PTA production process technology, and rotary vane vacuum pumps are often used. Need to configure multiple efficient vacuum pump, because of the large swept volume to meet the requirements. This paper analyzes the working principle of rotary vane vacuum pumps and rotary vane vacuum water pump in the application of the phthalate.

terephthalic acid, also known as terephthalic acid, is mainly made of p-xylene binary carboxylic acid yield the highest product, is the main raw material of polyester production. For solid at room temperature. Heating is not melting, at 300 ° C. If the heating in the sealed container, the melts at 425 ° C. Does not dissolve in water at room temperature. Mainly used in the manufacture of synthetic polyester resin, synthetic fiber and plasticizer.

in order to achieve the vacuum suction filter, PTA process of vacuum filter is equipped with the corresponding vacuum equipment is needed. This process is briefly described as follows: PTA slurry pump through filter feed conveyor to rotary vane vacuum pump; PTA filter cake by screw conveyor drying to rotary dryer, and then enter the subsequent process. By the rotary vacuum filter out of PTA filtrate and gas mixture into the vacuum filtrate separation tank; Isolated from the filtrate through filtrate vacuum pump to other parts of the pump. Isolated from the gas by vacuum filtration gas condenser cooling, and then the rotating rotary-vane vacuum pump. Suction is pumped to vacuum gas liquid separation tank, adding rotary vacuum filter in separation.

rotary vane pump of the rotary vane of the rotor and the pump cavity and surrounded by two end cover crescent-shaped space into A, B and C three parts. When the rotor rotates along the direction of the arrow, the space and inspiratory mouth connected volume is increasing, is inhaled. And vent connected space C volume decreases, and in the exhaust process. The central space B volume decreases, and in the compression process.

because of the space of A volume increase gradually, The expanded) , the gas pressure is reduced, and the external gas pressure at the entrance to pump than the pressure in the space of A strong, so the gas is inhaled. The space A isolated from air inlet, transfer them to the location of the space B, gas begins to be compressed, volume decreases, finally connect to the outlet. When compressed gas than exhaust pressure, the exhaust valve be pushed away, compressed gas, the gas emissions to the atmosphere through the fuel tank of oil. The continuous operation of the pump to achieve the purpose of continuous pumping. If through the air exhaust channel transfer (to another Low vacuum level) Level, through the low vacuum sucking it, and then compressed into the atmosphere side by side in the atmosphere, thus forming two stage pump. At this point, the total score for the two stage, thus increase the ultimate vacuum.

1. Significantly reduce energy consumption

in the process of vacuum filter, need only two rotary vacuum filter and vacuum water pump. Even including the consumption of energy and auxiliary equipment of the cooling water pump, and far less than the energy consumption of the centrifuge. Due to the vacuum filter cake moisture content is about 8% ~ 10%, well below 13% 20% of centrifugal water content of filter cake and downstream drying machine can greatly save the steam consumption, so as to achieve the goal of energy saving.

2。 Can effectively adjust capacity

the working characteristic of the centrifuge is, when output increases, the separation quality decline, thus increasing the workload for the following parts and auxiliary. When the processing capacity of centrifuge from increase to a high load, low load of the filter cake moisture content increased from 13% to 20%, the solid content of mother liquor from 2. Increased from 5% to 5%. At the same time, the mother liquor of PTA product accelerated the damage. Therefore, centrifugal separation is usually one of the main bottlenecks of increase plant productivity. Rotary vane vacuum pump can be mechanical adjustment of machine itself to effectively control production levels, for example, by increasing the height of the overflow baffle to increase the thickness of the filter cake.

only constant mechanical vacuum pump factory main products are 2 bv, V, VG, VI, VZ,. vn, LRP series water ring vacuum pump, X, GVD (gnu visual debugger) series rotary vane vacuum pump, what ZJ had roots vacuum pump series, GXS, DHS, VSD, GHS series screw vacuum pump, DZS series claw water pump, the central vacuum system, etc. The company acting with atlas. Manufacturing ( 阿特拉斯) , times g speck products. Constant to mechanical and electrical vacuum pump manufacturer with many years of production experience, first-class technical staff, perfect after-sales channels to make the product quality stable and reliable for many years. Constant to mechanical and electrical manufacturers expect to cooperate with every colleague, more knowledge of vacuum pump please continue to pay attention to our constant mechanical and electrical equipment co. , LTD. Contact phone number - 400 8625533, mobile phone 13928410990.