Basic requirements for steel structure of large air separation plant
Basic requirements for steel structure of large air separation plant
In the design of the steel structure of the air separation plant, the following basic requirements should be fulfilled to ensure safety, reliability, economical rationality, and cold insulation performance.
Products of Basic requirements for steel structure of large air separation plant
In the field of modern coal chemical industry, the air separation plant mainly provides oxygen and nitrogen. Oxygen is mainly used as gasification agent and reaction raw material, while nitrogen of different pressure levels is used as raw material nitrogen, inertia protective gas, pneumatic conveying gas and purging gas. In the past, air, oxygen-enriched or low-pressure pure oxygen were basically used as gasification agent in the domestic coal chemical industry, and the gasification efficiency, carbon conversion rate and gasification furnace capacity were all very low
In the chemical industry, the demand for air separation plant is stable. The high demand for air separation plant in modern coal chemical industry may drive the demand for large and super-large air separation plant. The 13000/22000-350 type air separation plant produced by DEAR air separation starts smoothly, all indicators reach the monitoring standard and begin to supply gas for customers. Relying on excellent products and high-quality service, DEAR air separation has received high praise from customers.
Almost all motors commonly used in the air separation plant are three-phase AC motors. Three-phase AC motor can be divided into asynchronous motor and synchronous motor. The rotating speed of the synchronous motor and the frequency of the power grid keep a strict relationship, namely:
N = 60f/P in the formula P -- magnetic pole logarithm; f -- grid frequency, the normal situation is 50Hz; n -- motor speed, r/min. For example, for two-pole (P = 1) synchronous motor, the synchronous speed is 3000r/min; for four-pole motor, P = 2, n = 1500r/min. While the rotating speed of asynchronous motor is always less than that of synchronous motor, and it generates rotating torque by its phase difference. Asynchronous motor is most widely used. It consists of a stator and a rotor, and has a stator and a rotor winding respectively. The stator winding is made of copper (aluminum) wire with outsourcing insulation. With the difference of rotor winding, asynchronous motor can be divided into squirrel ...