A Furnace Pressure Control System

Abstract

The invention discloses a furnace pressure control system, which comprises a furnace body, a control element cavity is arranged on the outer top surface of the furnace body, and a pressure detection module, an air heating module, an air input module and a PID module are arranged inside the control element cavity; The air heating module includes an electric control turntable, and the bearing of the electric control turntable penetrates the top wall of the furnace body, and keeps the bottom surface flat; There are heat conduction holes, and the heat conduction holes and the heat conduction strips are rotated and adapted; the side wall of the furnace body is also pierced with a pressure discharge pipe, and a gate valve is installed on the pressure discharge pipe; the air input module includes a heat-insulated and pressure-resistant pipe. The output port is located on the side of the output part of the gate valve; the invention prevents the output part of the gate valve from thermal bridge phenomenon when encountering extreme heat, thereby effectively protecting the gate valve; effectively controlling the temperature adjustment on the output part of the gate valve without connecting external heat, saving energy.

Description

technical field [0001] The invention relates to a pressure control system, in particular to a furnace pressure control system. Background technique [0002] In the pressure control process of the furnace, a differential pressure transmitter is generally installed on the top of the furnace to monitor the pressure in the furnace in real time, and the opening of the gate valve is controlled by the PID of the PLC to realize the micro positive pressure in the furnace. [0003] The gate valve is a gate of the opening and closing part. The direction of movement of the gate is perpendicular to the direction of the fluid. The gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled. The gate valve is sealed by the contact between the valve seat and the gate plate. Usually, the sealing surface will be surfacing with metal materials to increase wear resistance, such as surfacing welding 1Cr13, STL6, stainless steel, etc. There are rigid gate valves and...

AI Technical Summary

Problems solved by technology

[0004] Due to its fully open or fully closed structural design, when the gate valve encounters extremely fast output heat, the surface temperature will be too low, and thermal bridges will easily occur, which will cause condensation or expansion of the gate valve output itself, which will damage the gate valve itself. Large, and not conducive to pressure control in the furnace

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