Trolley type gas heat treatment furnace

Product use

This series of trolley type gas heat treatment furnace is mainly used for heat treatment of large shafts, forgings, steel castings, pressure vessels and large weldments in the heat treatment industry of metallurgical, mechanical and chemical equipment.

Product features

1. The combustion medium is heated by natural gas, with full combustion, no pollution and fast heating speed. The maximum operating temperature can reach 650-1200 ℃, and the flue gas emission conforms to gb9078-88 industrial kiln smoke layer emission standard.

2. The furnace lining adopts alumina ceramic fiber module structure, with small heat storage, low heat loss and significant energy saving.

3. High speed pulse burners are used for heating, with both sides evenly distributed. The combustion is regulated continuously by proportion, the air volume is regulated by actuator, and the gas volume is regulated by proportion valve. To achieve air-fuel proportional combustion, the gas and air volume are set with a lower limit, and the gas pipe of each burner is equipped with a control solenoid valve. Each burner is equipped with an independent and complete combustion controller, with automatic ignition, flame detection, fire alarm and automatic gas cut-off. In this way, the stability and safety of the combustion temperature control system can be fully guaranteed.

4. Waste heat utilization: preheat the high-temperature flue gas in the furnace to 250-300 ℃ through the heat exchanger, and then send it into the furnace to save gas consumption and production cost.

5. The door of the gas heating furnace adopts the composite frame structure of high aluminum all fiber fire-resistant silk blanket and heat-resistant steel, the electric hoist is lifted and lowered, and the door sealing mechanism adopts the long and short lever spring type automatic pressing cam mechanism (optional electric cylinder pressing device) and the soft edge sealing device. Ensure that there is no friction between the upper and lower parts, easy and free, safe and reliable.

6. The fire-resistant brickwork of the trolley adopts the high aluminum shaped brick structure, which has good sealing effect with the furnace body and high compressive strength. Pad iron shall be used on the trolley surface for stacking workpieces, and the frame of the trolley shall be made of heat-resistant steel to ensure that the car body is not deformed and durable. The sealing block electric push rod (or cylinder) of the furnace body and the furnace lining has an automatic pressing structure, and the opening and closing of the side and the seal are interlocked with the in and out of the furnace car.

7. Control system: adopt intelligent PLC control type computer automatic control.

Seven point one . furnace temperature control system:

Adopt advanced intelligent digital display temperature controller. It forms a closed-loop control with the temperature measuring elements and automatic control burners. The temperature controller interface and the upper PC are connected by R485 (RS422) bus to form an intelligent temperature control system of heat treatment furnace. The upper PC adopts industrial control computer, high-resolution LCD display and HMI monitoring software, which makes the whole system have a good user interface. Adopting advanced fuzzy control principle, it has high precision, high flexibility, anti-interference and high reliability. The temperature control system can automatically calculate, operate, display and store the heat treatment production process curve to realize the whole process control.

Seven point two . furnace pressure automatic control system:

The pressure in the furnace can be set and adjusted automatically, so that the furnace pressure can be controlled at the best value, so as to ensure the stable working condition in the furnace and make full use of the heat of the furnace gas.

Seven point three . pipeline parameter automatic control system:

The pressure of the combustion supporting air pipe and fuel pipe required by the combustion system can be set and adjusted automatically, so that the combustion supporting air and fuel can be controlled at the best ratio, ensuring high combustion efficiency and eliminating black smoke.

Seven point four . reliable safety protection system:

The instrument cabinet is equipped with operation value display of temperature, furnace pressure, burners and pipeline parameters, abnormal alarm and emergency protection measures to ensure operation safety.

8. Centralized control system

High precision Siemens PLC is used as the core unit of the whole furnace temperature control system. The temperature, pressure and combustion air pressure in the furnace are all controlled by PLC. In this way, various instruments such as temperature control, digital adjustment, manual operator and digital display are reduced, and the complexity of the whole system configuration is greatly reduced.

The upper PC adopts industrial control computer, high-resolution LCD display and HMI monitoring software developed by itself, so that the whole system has a good user interface to monitor several furnaces at the same time or the furnace needs upper computer monitoring (two or more PCs monitor one or several furnaces at the same time, the advantage is that the failure of one PC does not affect the normal operation of the whole system) , the software can easily meet the requirements.