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Instrumentation and gaz analysis for incineration

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Measuring instruments and gas analyzers
for the waste-to-energy industry


 

Fuji Electric measuring instrumentsMeasuring instruments and gas analyzers for the waste-to-energy industry
support professionals in the waste-to-energy
industry during each phase of their
manufacturing process in order to:

  • Lower the production costs
  • Increase yields
  • Extend the service life of installations
  • Reduce the air pollution

 

 


 

incineration plants

 

Control room and utilitiesControl room and utilitiesControl room and utilities schema
 

The central control room is where the incineration plants are monitored and operated.
Based on the output values ​​of each device, the ACC (Automatic Combustion Controller) controls the amount of fuel and air to ensure complete combustion and to suppress the production of toxic gases such as dioxin.
It also controls the speed of the movable grate to optimize the combustion position of the waste.
Utilities such as wastewater treatment facilities, water supply facilities, substation equipment, waste loading facilities are controlled by the DCS (Distributed Control System).

  • Temperature measurement & control
  • Flow measurement of utilities
  • High accuracy flow measurement
  • Measurement data recording

 


IncineratorIncinerator
 

An incinerator is a furnace in which waste is burned.
Waste transported to a hearth incinerator is burned until it turns to ash.
A fixed hearth incinerator consists of a drying hearth, a combustion hearth and an afterburner hearth.
The waste is first transported to a drying chamber to be dried with hot air at over 200 ° C and ignite.
Then, the waste is conveyed to a combustion device, the delivery speed of which is controlled to keep the combustion position constant.
Finally, in a post-combustion furnace, the waste is burned at a temperature between 850 ° C and 950 ° C in order to prevent the formation of dioxin.

  • Temperature measurement & control
  • Internal pressure monitoring
  • Flow measurement (fuel, gas)
  • Flow measurement (cooling water)
  • High accuracy flow measurement
  • Combustion control

    incinerator schema

 

BoilerBoiler
 

ChimneyChimney
 

 

Cooling towerCooling tower
 

A cooling tower is the equipment that lowers the temperature of the flue gases to 150 ° C by spraying water into the flue gases.
The temperature of the flue gases during the waste incineration process is above 800 ° C.
It is then cooled below 250 ° C as the gas passes through boilers and pipes.
The reason for lowering the temperature of the flue gases is to prevent the resynthesis of dioxin in this temperature zone.
Dioxins are generated from frying ash and Cl.

  • Emission monitoring
  • Monitoring of air pressure and flow rate
  • Metering of cooling water use
  • Temperature measurement & control

    cooling tower schema

 

Bag filter (+ dechlorination equipment)Bag filter
(+ dechlorination equipment)
 

A baghouse filter, also called a baghouse dust collector, contains many fabric filters.
The number of filters varies from 10 to several hundred depending on the scale of the installations.
A bag filter is capable of filtering particles of about 0.2 µm.
When the filtered gas contains dust, slaked lime is added at the same time.
Then the slaked lime absorbs chlorine and harmful ash. Passing through all the filters,
the gas is cleaned before being emitted through the chimney.
As the surface of the filters becomes dusty, it is necessary to remove the dust regularly.

  • Internal pressure monitoring
  • Temperature measurement & control
  • Flow measurement of each facility
  • Emission monitoring

bag filter schema

 


Denitrification equipmentDenitrification equipment

NOX in exhaust gases produces a harmful substance called a photochemical oxidizer in response to ultraviolet light
radiation. If the photochemical oxidizer stays in the air and turns into smog, it is called photochemical smog.
NOx diffused in the air binds with H2O or 02 to form HN03. This causes acid rain which pollutes rivers and soils.
In denitrification equipment, NH3 is added to the flue gases so that the NOx is reduced to N and H20.
The catalytic unit has a honeycomb type catalyst which helps NOx and NH3 to bind together.
To save energy and reduce costs, it is important to measure the concentration of NH3 and control the amount of NH3 used.

  • Temperature measurement & control
  • NH3 input control
  • NH3 flow measurement
  • Internal pressure monitoring
  • Emission monitoring
  • Flow measurement of each facility
  • High accuracy flow measurement

     

Denitrification equipment schema

 

 

Instrumentation and gaz analysis for incineration documentation