Hose pump characteristics and its application in the production of phosphate fertilizer (a)

Conventional pumps used in the production of wet-process phosphoric acid have various drawbacks and are now being introduced to manufacturing enterprises by their increasingly sophisticated hose pumps. 1. Hose pump structure and working principle Hose pump is composed of pump housing, rotor body, reducer, machine base and hose 5 most of the components, shown in Figure 1. Hose pump work, the rotor body rotation, the rotor body of a pair of pressure roller along a special hose rotation, the pressure roller and the pressure generated by the casing will be flattened hose, tube flexibility in itself and the side guide roller , The liquid is sucked into the vacuum by recovering the original shape, and the liquid is discharged from the tube by the mechanical squeeze of the press roll, so as to reciprocate. The pump structure is simple, easy to make. Pump durability depends mainly on the flexibility and corrosion resistance of the pipe, the flow and the motor speed and the size of the tube diameter, so the key is to choose the tube and speed control mechanism, as long as the tube has a long enough life, speed stability, long-term There is no problem with maintaining a constant delivery. 2. The main features of the hose pump (1) is a positive displacement pump, with or without mechanical seal, self-priming ability, self-cleaning and other characteristics. (2) No pump valve, stuffing box, will not produce the leakage of sealing pump and air resistance phenomenon. (3) simple structure, strong adaptability, liquid, gas, slurry and viscous materials can be transported suspended, especially the smooth hose cavity can pump impurities liquid, a variety of fiber objects and containing the particle size Hose diameter 1/4 below the solid slurry, and does not produce any blockage. (4) without running the pump before running, dry running, there will be no spindle seals and other failures, the pump suction liquid only contact with the hose, it can transport rubber can withstand corrosive and abrasive media, you can replace the general Stainless steel pump. (5) can be positive and negative rotation, not set import and export, less power consumption, high hydraulic and volumetric efficiency. (6) has a good measurement capability, can be used as a metering pump, by selecting the size of the tube and adjust the speed to change the flow, a wide range of flow (3 ~ 9m3 / h), measurement accuracy, high repeatability (7) Many (vinyl plastic, nylon, rubber and silicone rubber, etc.) for conveying a variety of corrosive, toxic, sterile, radioactive and other media. Tube diameter 0.5 ~ 75mm, working pressure up to. .98MPa, the working temperature is -62 ~ +260 '℃ The contact life of the pipe is generally 200 ~ 700h. When you can not continue to use, you can change the extrusion of the pipe or replace the new tube. (8) 1 pump head can hold 1 to 20 tubes or 1 pump Install multiple sets of pump head work, while conveying one or more media. 1 pump multi-purpose, 1 pump can replace several pumps (suction, row can be homework), small working volume, high efficiency mouth.