OJSC North town of Moscow. Boiler house Boiler DKVR 10/13 - electrification

General part

This section of the project is designed in accordance with the requirements of:

- "Safety rules for gas distribution and gas consumption systems PB12-529-03";

- "Automatic control systems for gas burners and apparatus." GOST R 52219-2004

- "Technical requirements to the subsystem of process protections made on the basis of microprocessor equipment." RD15334.1-35.137-00

- "Technical requirements for automated control system of gas-oil boiler burners, which contributes to the increase of explosion safety during ignition of burners." SO34.35.677-2003

- "General explosion safety rules for explosion and fire hazardous chemical, petrochemical and oil refining plants PB 0954003";

- "Rules for installation of gas analyzers TU GAZ."

- PUE "Electrical Installation Rules"

The selection and placement of automation tools are taken into account:

- automation tools available in operation;

- categories and characteristics of the environment of the premises in which automation equipment is located;

The objects of automation of this project are steam boiler

DKVR 10/13 type.

The project does not include a TK for the development or adaptation of a software product.

Scope of automation

The scope of automation is defined by the requirements:

"Federal Law on Industrial Safety of Hazardous Production Facilities of 20.06.1997

"Safety rules for gas distribution and gas consumption systems PB12-529-03";

The project decisions provide for:

1. Automatic burner control system (ACS) performs the following functions in automatic mode:

pressurization of gas units;

ignition of burners;

setting the burners to minimum thermal power;

control of burners thermal power from minimum to nominal;

automatic power equalization of burners;

standard and emergency (in case of violation of controlled parameters) shutdown of burners with performance of operations of shut-off valves closing control, post-stop test of their closing density. Perform required burner shutdown operations;

execution of regulatory protections and interlocks on the listed burner control functions in any modes;

registration of pre-emergency and emergency parameters and states.

2. Automatic regulation:

• water level in boiler drum;

• vacuum in boiler furnace;

• steam pressure in the boiler drum;

• air supply in relation to gas supply to burners.

3. Emergency protection of boiler unit (ESD) by automatic stop of fuel supply to burners at:

• reduction of gas pressure upstream the burner;

• increase of gas pressure upstream the burner;

• reduced rarefaction in the furnace;

• reduction of air pressure upstream the burner;

• torch 1 flare failure;

• torch 2 flare failure;

• increase of steam pressure in boiler drum;

• increase of water level in boiler drum;

• lowering the water level in the boiler drum;

• faults of protection circuits;

• Voltage loss;

• increase of concentration of carbon monoxide (CO) 100mg/m3;

• increasing methane (CH4) concentration;

• when the smoke is stopped;

• when the fan stops;

4. Light-and-sound alarm of ACS and ESD system operation with detection and storage of the accident root cause.

• pre-purge;

• pressurization by lower gas pressure;

• Gas upper pressure testing;

• boiler is ready for ignition;

• combined burning of burner 1 with igniter flare 1;

• co-burning of burner 2 with igniter flare 2;

• boiler in operation;

• final blowdown;

• boiler shutdown;

• emergency gas pressure "low";

• emergency gas pressure "high";

• flare no burner 1;

• flare no burner 2;

• emergency vacuum "low";

• emergency air pressure "low";

• emergency level "high";

• emergency level "low";

• emergency steam pressure "high";

5. Control and registration

• gas pressure upstream of the burner;

• dilution in the furnace;

• air pressure upstream the burner;

• steam pressure in the boiler drum;

• water level in boiler drum;

• steam flow rate;

• feed water flow rate;

• temperature of exhaust gases downstream the boiler;

• exhaust gas temperatures downstream the economizer;

• temperature of feed water from the deaerator;

• feedwater temperature upstream of the boiler;

• gas flow to the boiler.

Automation Technical Solutions

Certified domestic and imported automation equipment is used to solve the problems of automation of a boiler of the DKVR 10/13 type.

Algorithms of SAUG, ESD, control, recording and control functions are made on the basis of TEKONUS TKM410 controller of TEKON company. The system software is provided by the manufacturer complete with the controller.

Provision of current as well as archived information is performed on operator panel V04 of "TEKON" company.

All automation tools are located at the operator's automated site (AWS) in the form of a WCC board (boiler control cabinet).

To collect information into the microprocessor system, domestic sensors with standard discrete and analog outputs are used. The sensors are selected for reasons of economy, accuracy and reliability, and are placed on a common rack for ease of use.

Local control of gas, vacuum, air and level parameters is carried out by indicating instruments installed at the boiler front.

Organize the flow of information.

Information is provided on the operator panel

1. About the current values of the following parameters:

• gas pressure upstream of the burner;

• dilution in the furnace;

• air pressure upstream the burner;

• steam pressure in the boiler drum;

• water level in boiler drum;

• steam flow rate;

• feed water flow rate;

• temperature of exhaust gases downstream the boiler;

• exhaust gas temperatures downstream the economizer;

• temperature of feed water from the deaerator;

• feedwater temperature upstream of the boiler;

• gas flow to the boiler;

2. Condition of electric drives of smoke pump and fan.

3. Position of actuators of gas damper, water supply valve to boiler, guide vanes of smoke pump and fan

Hardware Reliability Management

APCS reliability is achieved by monitoring the presence of signals from time-to-time sensors of one parameter. Optimal reliability of the discrete signal in case of any type of failure is provided when processing the signal according to the "two of two" discrete and analog schemes. Power supply of analog and discrete sensors of the same parameter is organized from different power sources.

Проект автоматизации котла ДКВР 10,13.dwg