Automatic nitrogen pressure regulating control device of refining and cracking buffer tanks

Abstract

The invention relates to a pressure regulating device, and particularly relates to an automatic nitrogen pressure regulating control device of refining and cracking buffer tanks. The automatic nitrogen pressure regulating control device and is composed of the cracking buffer tank, the refining buffer tank and a nitrogen charging pipeline; the device is characterized in that a top pipeline of the refining buffer tank is connected to the upper part of the cracking buffer tank, and the top of the cracking buffer tank is connected with the nitrogen charging pipeline through a nitrogen control valve; a blow-down pipeline connected by an air release valve, is arranged between the top of the cracking buffer tank and the nitrogen control valve, and the nitrogen control valve and the air release valve are connected with a pressure balance switch controller through a circuit. The automatic nitrogen pressure regulating control device of the refining and cracking buffer tanks, provided by the invention, has the advantages that the structure is reasonable, the operation is smooth and stable, and the pressure control is stable; a condition that the pressures in the refining buffer tank and the cracking buffer tank are stable is guaranteed through practical verification, the normal operation of a feeding pump of the refining and cracking buffer tanks is guaranteed, and the safe and stable production purpose is achieved.

Description

technical field [0001] The invention relates to a pressure regulating device, in particular to an automatic control device for nitrogen pressure regulation of a refining and cracking buffer tank. Background technique [0002] Refining buffer tanks and cracking buffer tanks are indispensable devices in the field of coal chemical industry, and they play a vital role in safe production. According to the technical requirements, the tank tops of the refining buffer tank and the cracking buffer tank should always be under positive pressure. Changes in the pressure in the tank will affect the normal operation of the feed pump of the refining buffer tank or the feed pump of the cracking buffer tank, and the fluctuation of the feed flow rate of the reaction will increase, thereby limiting the stability of the reaction system operation. Therefore, there is an urgent need for a pressure control device that can effectively control the pressure in the refining and cracking buffer tank a...

AI Technical Summary

Problems solved by technology

According to the technical requirements, the tank tops of the refining buffer tank and the cracking buffer tank should always be under positive pressure. The pressure in the tank changes, which affects the normal operation of the feed pump of the refining buffer tank or the feed pump of the cracking buffer tank, and the fluctuation of the feed flow rate of the reaction increases, thereby limiting the stability of the reaction system operation

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