IHI-CPCS New multiple Boiler Control System

IHI-CPCS New multiple Boiler Control System for multi-installation of once through boiler supplier Constant and steam as large capacity boiler plant.

On multi-installation of once through boiler steam from each boiler is led once to steam header, from where steam is supplied to each facility.

Detecting steam pressure of the header, multiple boiler control panel sends combustion signal (Stop, Low Firing , Middle Firing, High Firing)

To each boiler so as to keep the steam pressure in the pressure pre-designated.
Receiving those signals each boiler decides combustion level.

We have developed latest Multiple boiler control system IHI-CPCS instead of conventional step-Shaped control system and obtained a patent for this technology.

Conventional Control System

Conventional step-shaped control system decides boiler combustion level according to step-shaped Pressure level. In other word when steam pressure
of steam header decreases, combustion signal To each boiler increases. When steam pressure rises, combustion signal decreases. This means that Boiler
cannot show 100% ability until steam pressure decreases down to the lowest pressure subdivided. The more number of boiler is, the lower steam
pressure on which boiler can show 100%
Ability becomes.
For example in case of 2 T/H boiler x four units, even though target of steam pressure is 8.5 Kg/cm2
Combustion signal that all four boilers run at 100% capacity is not sent until steam pressure decreases down to 7.4 kg/cm2 .
Thus it is not possible to supply constants and steady steam like large capacity boiler plant.

Advantage of IHI-CPCS System

On the other hand IHI-CPCS sends combustion control signal so that target steam pressure of steam header is kept within ± 0.2 kg/cm2 of the target
steam pressure.
When steam of 8.5 kg/cm2 is required, steam pressure is kept at 8.5 kg/cm2.
That is, when steam pressure decreases, following boiler runs or increases combustion level.
When steam pressure rises boiler combustion leveldecreases so as to keep steam pressure constantly at 8.5 kg/cm2
Even though steam load fluctuates, constant steam pressure can kept as close as at target pressure And even in case that number of boilers are so
many, boiler can show 100% ability at high target steam pressure.
Thus it is becomes possible to supply constant and steady steam like large capacity boiler plant.

NEW
CONTROL
SYSTEM
TARGET PRESSURE
CONTROL

Aiming to required press.
Sending combustion signal to each boiler to minimize difference between target press. And actualPress.
FORECAST CONTROL
Forecasting press Change
Sending control signal, forecasting press. Change in future, to aim target press in future, to aim target press. In addition to target press control.

RICH
FUNCTIONS
CYCLIC RUNNING
Well-balanced start/stop
Shifting priority order number clockwise so that frequency of stat/stop of boiler becomes well-balanced
AUTOMATIC ROTATION
Well-balanced Firing period
Shifting priority order number daily so that firing period of boiler becomes well-balanced.
STAND-BY SETTING
Effective in case of Unsteady
steam consumption
Specified boiler can be started and stopped at optional pressure Effective in case of sudden increase of steam consumption for a short time.
COMPULSIVE LOW FIRING
Keeping boiler hot condition
Sending Low firing signal to the boiler stopping continuously for more than one hour
BACK UP FIRING
Acidingpress drop when
pre-purging
Back up firing (increase of combustion level) by former priority boiler when
pre-purging.

SAVING ENERGY ON MULTI-BOILE
INSTALLATION

IHI-CPCS New Multiple Boiler Control System
Constant Pressure Control System
  • Constant and steady steam supply
  • Effective practical Use of Multi-Boiler
  • Energy-saving Boiler Running according to steam consumption
  • Avoidance of Sudden Drop in Steam Pressure
  • Long and Uniform Life of Boiler
  • Unnecessary Boiler License, Making The Best of Talent
  • Easy Operation and Maintenance

Conventional Control System

Q1. What kind of System Composition

A1. Because Multi Boiler Control panel control all subordinated boilers. Especially in case of K-L series boiler (Patent), more precise combustion control is possible therefore frequency of boiler start/stop becomes minimized.

Q2. Why constant and steady steam can be supplied

A2. Because of application of Target Pressure Control, which minimize at all times difference between target pressure and actual pressure

Q3. Why energy-saving boiler running according to steam consumption is possible.

A3. Because Multi Boiler Control panel control all subordinated boilers. Especially in case of K-L series boiler (Patent), more precise
combustion control is possible therefore frequency of boiler start/stop becomes minimized.

Q4. Why Sudden drop in steam pressure is dissolved?

A4. Because stand-by boiler can start when steam pressure starts to decrease due to abrupt steam consumption

Q5. Why boiler life is unified?

A5. Because “Cyclic” and “Automatic Rotation” systems are adopted so that frequency of start/stop and firing period of boiler become well balanced.