Gas metering unit based on Logic SPG761 and Gas Counter SG-16MT

General Instructions

The set of working drawings of the boiler house's AGSV brand has been developed in accordance with the norms, rules and standards in force on the territory of the Russian Federation.

The project provides for:

Control of gas content by methane and carbon oxide in the boiler room with signalling of reaching of gas content thresholds on instruments installed on site and on the display of the SHA cabinet controller

Control of gas pressure at boiler house inlet

Automatic closing of the gas shut-off valve when the second gas content threshold for methane and carbon oxide is reached, in case of fire in the boiler room, as well as when the gas pressure at the inlet to the boiler room increases and decreases

Data transmission to SHA cabinet (ATM section) via RS 485 interface and output to remote control room via GSM channel, signals:

Actuation of fast-acting gas shut-off valve at the boiler room inlet

"Threshold I" of CO concentration equal to 20 ± 5 mg/m3 (MPC p.z.)

"Threshold II" of CO concentration of 95100 mg/m3 (5PDC p.z.)

"Threshold I" of 10% CH4 concentration

"Threshold II" of CH4 concentration equal to 20% of NCPR

fire in boiler room

boiler room gas pressure

Accounting of consumed boiler gas

Boilers are equipped with built-in automation system (supplied complete) providing the necessary control and protection input algorithms.

Boiler safety system provides shutdown in the following situations:

increase or decrease of gaseous fuel pressure upstream burners

reduction of liquid fuel pressure upstream burners

reduction of air pressure upstream burners

torch flare failure,

increase and decrease of boiler water level

increasing steam pressure

faults of protection circuits, including loss of supply voltage

opening of the burner hatch.

The boiler automation system tests the tightness of the disconnecting devices on the gas line before the burner.

The reduction in gas pressure upstream of the burners is monitored by the minimum and maximum gas pressure relay sensors.

Decrease of liquid fuel pressure - fuel pressure sensor-switch. Air pressure in front of burners is controlled by minimum air pressure sensors.

The flame sensor monitors the presence of the flare.

Pressure increase at boiler outlet is controlled by protective limiter.

Burner automation provides the necessary algorithms for ignition, boiler shutdown (blowing, blocking) and boiler capacity control.

All metal non-current-carrying parts of the electrical installation that are not normally energized must be connected by a separate core to the main grounding bus of the distribution boards. A potential equalization system is provided in the boiler room.

The technical solutions proposed in the working drawings comply with the requirements of environmental, sanitary, fire and other standards applicable in the territory of the Russian Federation, and ensure safe operation of the facility for life and health of people, subject to the measures provided for in the working drawings.