Rotary valve gas circulating system

Abstract

The invention belongs to the technical field of PTA production, and particularly provides a rotary valve gas circulating system. The system comprises a drying machine, a standby rotary valve, an online rotary valve and a silo which are connected in sequence, wherein one pipeline of the drying machine comprises a discharge valve I, the standby rotary valve, a drain valve I, a stop valve I and the silo which communicate in sequence, and the other pipeline comprises a discharge valve II, the online rotary valve, a drain valve II, a stop valve II and the silo; one end of a pipeline I is connectedwith a pipeline located between the discharge valve I and the standby rotary valve, and the other end is converged with a pipeline II; one end of the pipeline II is connected with a pipeline located between the discharge valve II and the online rotary valve, and the other end is converged with the pipeline I; one end of a pipeline III is connected with the converged position of the pipeline I andthe pipeline II, and the other end is connected to a discharge port of the drying machine; and a valve I is arranged on the pipeline I, a valve II is arranged on the pipeline II, and a valve III is arranged on the pipeline III. According to the system, paths of sealing gas and sweeping gas are guided into the drying machine, potential safety hazard of inert gas is eliminated, and the fault treatment time is shortened.

Description

technical field [0001] The invention belongs to the technical field of PTA production, in particular to a rotary valve gas circulation system. Background technique [0002] Rotary valve (also known as star feeder and impeller feeder), which takes the advantages of advanced unloading, is a uniform and continuous batching, conveying, and unloading equipment in a mechanized and automatic control system. With its simplicity, environmental protection, and long-distance automatic control, rotary valves are widely used in many industries and fields such as powder engineering, grain processing, ports, petrochemicals, chemical fibers, chemicals, electric power, medicine, food, building materials, and mining. application. [0003] The working principle of the rotary valve is that it is composed of a rotor with several blades, a housing, a seal, an electric motor, and a reducer. When the rotor rotates in the cylindrical casing, the material falling from the upper hopper by its own we...

AI Technical Summary

Problems solved by technology

The existing system uses the rotary valve of the spare table of the dryer to discharge the sealing gas and the purge gas of the process shut-off valve through the outlet pipeline of the rotary valve, and directly discharges to the atmosphere through the discharge valve. Because the discharge port is low, the inert gas discharged is mainly nitrogen. , it is easy to cause suffocation, and there is a big safety hazard, and because the shut-off valve is not tightly sealed, with the discharge of the sealing gas of the spare rotary valve, there may be some powder leaked from the dryer, which will have a certain impact on the environmental sanitation of the site

On the other hand, under normal working conditions, the discharge rotary valve of the dryer is one for use and one for standby, while the outlet discharge of the standby rotary valve is open. Switching the rotary valve of the spare table requires personnel to arrive at the scene quickly and close the discharge. If it cannot be closed in time, it may cause the dryer to be blocked and affect production. Therefore, we analyze the above problems and combine them with the actual production situation. , redesign this

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