alphabetic燃烧控制系统(中英对照翻译)

2021年1月20日发(作者：eton)
燃烧控制系统

Combustion Control System

1
．燃烧控制系统的结构

1. Combustion control system structure

燃烧控制系统为了满足机组负荷变化的需求和保证锅炉 安全经济运行，
按照协调控制的
原则，燃料、送风和引风等子控制系统应根据燃料主控信号(
来自燃料主控制系统
)
进行协调
控制。其总体结构如图
4—
2
所示。

The
combustion
control
system
is
intended
to
meet
the
changing needs
of unit
load
and
ensure
safe and economic operation of the boiler. In accordance with the principle of coordinated control,
sub-control
systems
for
fuel,
air
supply
and
induced
air
should
be
subject
to
coordination
and
control
according
to
the
fuel
master
signal
(from
the
fuel
master
control
system).
The
overall
structure is as shown in Figure 4-2.

机组协调控制系统

燃煤负荷指令
RM
燃料主控系统

送
风
量
指
令
携带风控制系 统磨煤机煤位控
制系统、一次风压控制系统等

送风控制系统

引风控制系统

燃料量

送风量

引风量


图
4
—
3
燃烧控制系统的总体示意图

Figure 4-3 Overall Schematic Map of Combustion Control System
机炉主控制器将送出锅炉主控信号
(
燃烧率信号)
，再分别下达到燃料、送风、引风子系
统中去。
对于直吹式制粉方式，
通过调节给煤机转速和一次风流量来改变锅炉的燃料量，
通
过调节送风量和引风量来保证锅安全 和经济燃烧。

The boiler master controller will issue a boiler master control signal (combustion rate signal) and
send it to the fuel, air supply and induced air sub-systems. In view of the direct-fired pulverizing
method, the boiler fuel flow is changed by adjusting the coal feeder speed and the primary air flow,
while
the
boiler
safety
and
economic
combustion
is
ensured
by
adjusting
the
air
output
and
air
input.




Unit CCS
Fire Coal Load
Fuel MCS
Carrying Air Control System,
Coal Mill Coal-position Control
Air Supply
Induced Draft
Air
Flow












Fuel
Air Flow
Indu ce
由图
4
—
3
可见，当机组负荷变化需要改变燃料量时，由负荷控 制系统中的燃料主控系
统根据锅炉负荷指令产生燃煤负荷指令和风量指令，其中燃煤负荷指令送往燃料控 制系统
(
包括磨煤机料位
/
给煤机转速控制、燃油控制、一次风压力控制、携 带风控制和旁路风控制
系统等
)
、
送风控制系统
(
包括送风 机压力控制、
燃烧风控制系统等
)
和引风控制系统，
使燃料、
送风、 引风等共同适应负荷变化，保证锅炉安全经济运行。

Figure 4-3 shows that, when the fuel flow needs to be changed in case of changes in the unit load,
the fuel master control system in the load control system will generate a fire coal load demand and
an air flow demand according to the boiler load demand. The fire coal load demand is sent to the
fuel control system (including coal mill level / coal feeder speed control, fuel control, primary air
pressure control, carrying air control and bypass air control system, etc.), the supply air control
system
(including
air
supply
fan
pressure
control,
combustion
air
control
system,
etc.)
and
the
induced air control system. This allows the fuel, supply air, induced air, etc. to commonly adapt to
changes in load, thereby ensuring safe and economic operation of the boiler.

可以看出燃烧控制系统是一个典型的多变量、
多级 耦合的控制系统。
整个燃烧控制系统
中的风、
煤各子系统都串接在协调控制系统的下级 ，
协调控制系统输出的锅炉负荷指令统一
指挥风、煤各子系统的协调动作。

It
can
be
seen
that
the
combustion
control
system
is
a
typical
multi-variable
control
system
of
multi-stage
coupling.
The
air
and
coal
subsystems
in
the
entire
combustion
control
system
are
cascaded in the lower level of the coordinated control system. The boiler load demand input by the
coordinated
control
system
gives
unified
command
to
the
coordinated
action
of
air
and
coal
subsystems.

燃料主控系统是串接在协调控制系统下的一个
“
比值一串级
”
控制系统，
燃料主控制系统
的输出指令是携带风控制系 统的给定值，
携带风调节器根据该指令与携带风实际风量的偏差
信号控制磨煤机入口管路的风门 开度，以调整一次风量，从而适应锅炉负荷所需的煤粉量。
为了保证稳定地供应所需煤粉量，
就 必须稳定一次风压，
为此通过一次风控制系统控制两台
一次风机的入口导向挡板开度，以保证一 次风压稳定。

The
fuel
master
control
system
is
a
“ratio
-
cascade”
control
system
cascaded
to
the
coordinated
control
system.
The
output
demand
of
the
fuel
master
control
system
is
a
given
value
of
the
carrying air control system. The carrying air regulator controls the throttle opening of the coal mill
inlet line according to the deviation signal between this demand the actual carrying air flow, so as
to
adjust
the
primary
air
flow
and
accommodate
the
amount
of
pulverized
coal
required
by
the
boiler load. In order to ensure stable supply of pulverized coal required, the primary air pressure
must be stable. Therefore, the primary air control system controls the opening of the inlet guide
baffle of two primary air fans so as to ensure the stability of the primary air pressure.

锅炉送风量控制系统是串接在燃料主控制系统下的一个具有氧量校正的 比值控制系统。
保持进入锅炉炉膛的实际总风量与锅炉燃料量相适应，
从而间接保证风煤比最佳 。
在具体实
施过程中，该系统又通过送风压力控制系统、燃烧风
(
包括辅助风 、燃尽风、夹心风等
)
控制
系统以及气一汽温度控制系统等实现。

The boiler air output control system is a ratio control system which is cascaded to the fuel master
control
system
and
is
capable
of
oxygen
correction.
The
actual
total
flow
entering
the
boiler
furnace should be maintained appropriate for the boiler fuel flow, so as to indirectly ensure the
optical air- coal ratio. In the specific implementation process, the system is achieved through the
supply
air
pressure
control
system,
the
combustion
air
(including
auxiliary
air,
over
fire
air,
sandwich air, etc.) control system, and the gas-steam temperature control system.

炉膛负压是通过调整两台引风机的静叶片来改变烟气量，
以维持炉 膛压力为设定值。
为
了使引风控制不滞后于送风控制，
在引风控制系统中采用了具有风 量指令微分信号前馈作用
的单回路定值调节系统。

The furnace negative pressure changes the volume of flue gas by adjusting the static blade of the
two
induced
draft
fans,
so
as
to
maintain
the
set
value
of
the
furnace
pressure.
To
ensure
that
induced air control does not fall behind supply air control, the induced air control system employs
a single-loop fixed value regulating system capable of differential single feedforward action of air
flow demand.

综上所述，
燃烧控制系统必须保证燃料是与空气量的配合，
又必须保证引风 和送风的配
合。然而像燃料量的控制又依次关联到一次风量、一次风压和原煤给煤量
(
即磨煤机煤位／
给煤机转速
)
等的控制，各控制系统之间互相关联，不能脱节，否则将 难以保证整个燃烧控
制系统任务的完成。

In summary, the combustion control system must ensure coordination between fuel and air amount
and between induced air and supply air. However, the control of fuel flow is related to the control
of primary air flow, primary air pressure and feed amount of raw coal (i.e. coal mill level / coal
feeder speed). All control systems are interrelated and inseparable, otherwise it will be difficult to
guarantee the completion of tasks of the entire combustion control system.

2
．信号的修正和限制

2. Signal correction and restrictions