SZL double drum steam boiler

SZL double drum steam boiler is a double drum longitudinal chain grate boiler The boiler body consists of vertically arranged upper and lower drums and convection tube bundles There are light tubes and water-cooled wall tubes installed on both sides of the combustion chamber The upper drum is equipped with a steam water separation device and a surface drainage device, while the lower drum is equipped with a regular drainage device An economizer is installed at the rear of the boiler The combustion section adopts a lightweight chain grate for mechanical coal addition, equipped with a blower and induced draft fan for mechanical ventilation, and a spiral slag extractor for automatic slag removal The fuel falls from the coal hopper onto the grate and enters the furnace for combustion. The flame refracts upwards through the rear arch and passes through the combustion chamber of the main body, turning towards the convection tube bundle. It then enters the economizer and dust collector through the rear flue gas outlet, and is drawn by the induced draft fan through the flue to the chimney before being discharged into the atmosphere
Vertically arranged chain furnace drainage pipe steam boiler, convection arranged heating surface has high heat transfer efficiency, reasonable water circulation system, large water capacity, large steam space, and good steam quality. The convective heating surface has the greatest abundance, and the efficiency characteristics of boiler operation are stable and have a certain degree of overload operation capability. The lightweight chain belt assembled grate is equipped with a stepless speed regulation device, making the adjustment of combustion conditions more complete. The combustion is achieved by using a lightweight chain grate for mechanical coal addition, and is equipped with drums and induced draft fans for mechanical ventilation.

The automatic control and fault protection features of the product
Boiler steam pressure automatic regulation system
When the control system of the boiler steam pressure automatic regulation system enters the working state and meets the necessary conditions for combustion:
When the steam pressure inside the pot is higher than or equal to the set upper pressure limit, the control system outputs a stop signal. Until the combustion stops.
Water supply self-control:
When the system is working normally, start the water supply pump, the water pump works, and the water level differential pressure transmitter detects the water level signal to maintain the stability of the boiler drum water level. Ensure the quality of steam. The water level regulating instrument displays the boiler water level.
Manual control: The water pump can also be manually controlled by tapping the manual buttons on the control panel.
Fault alarm and protection
This control system can monitor the current working conditions of gas steam boilers in real time, and perform real-time and comprehensive intelligent fault identification and handling. The control system is capable of real-time diagnosis and handling of the following faults:
High steam pressure protection: When the steam pressure in the pot exceeds the limit, the control system immediately enters a chain, and an audible and visual alarm is triggered, with the screen displaying "extremely high steam pressure". After the fault is eliminated, press the reset button to release the interlock.
Water shortage protection in the boiler: When the boiler experiences an extremely low water level due to water pump failure or other reasons, the control system immediately shuts off the burner power, enters a chain, and triggers an audible and visual alarm, with the screen displaying an extremely low water level. After the fault is eliminated, press the reset button to release the interlock.
Boiler water level too high: When the water level in the boiler exceeds the upper limit warning water level, an audible and visual alarm will be triggered. Prompt "The water level in the pot exceeds the upper limit", and the display screen indicates drainage. After the fault is eliminated, it will automatically recover and stop the pump without stopping the furnace.
Overload of water pump motor: When the water pump motor overcurrent occurs, the thermal relay will operate, cutting off the power supply of the water pump motor and stopping the water pump, which is implemented by hardware.
Power outage fault: When a power outage occurs, the control system immediately shuts off the power supply to all equipment in the cabinet where the power outage occurred. The power supply has been restored, and the cabinet is automatically in the off duty state. It needs to be restarted for work and all devices must be started to ensure equipment safety.