Process details
- Overview
- Custody transfer measurement of fuel gas
- Custody transfer metering systems
- Level measurement of waste reception and conditioning
- Flow measurement of grate cooling
- Primary air flow measurement
- Full chute detection
- Flow measurement of spray water
- Pressure measurement of secondary air
- Temperature measurement of grate cooling
- HFO flow measurement
- Flow measurement of gas
- Level measurement of deslagging unit
- Blocked chute detection
- Flow measurement of NH³ injection
Waste storage, preparation and incineration in waste incineration
Instruments for waste reception and combustion
The waste collected for incineration is stored in a waste bunker. Odors escaping from the bunker are prevented by keeping the bunker at a slight vacuum, by taking the combustion air for the boiler out of the bunker section. Pre-mixed waste is fed by crane to the feeder hopper, then via a chute to the inlet section of the boiler grate. The staged combustion takes place in the different zones of the grate. It is controlled by the primary air flow to the different zones of the grate. The grate is air or water cooled. Oil or gas burners exist to ignite and supplement the combustion process. Spray water is used to control the temperature in the gas path as well as the temperature in the steam pipes in order to control the steam temperature. Slag/ash is removed by the furnace bottom ash receiver which cools the ash and seals the furnace vacuum against the environment with water. Measurement of bulk solid materials is not a trivial task; uneven surfaces, different moisture levels and high levels of dust reflect only some of the challenges. KROHNE pioneered radar level measurement technology for process applications and today offers a broad range of sophisticated FMCW and TDR based technologies for level measurement of liquids and all kinds of solids - for almost every application.
The OPTIWAVE-series are FMCW radar level meters for liquids and solids, with operating ranges from 6 to 80GHz. The patented drop antenna at the OPTIWAVE 6400 securely avoids dust build-up that can occur in metallic horns, and drastically improves the reliability and availability of the instrument. This is very useful for dusty environments. In the area of waste storage and preparation, OPTIWAVE 6400 and OPTIWAVE 6500 are used within the entire handling chain, including the waste bunker, during the transportation via conveyor belts and in the waste hopper, where the instrument is often used to replace older level meters based on nucleonic technology.
The OPTISONIC 7300 ultrasonic gas flowmeter measures the natural gas flow for ignition, or supplemental burners, giving immediate response to flow changes. It also works without moving parts and consequently is maintenance free. With a high turndown ratio the flowmeter is suitable for measuring low load and high flex operation and virtually measures down to zero flow. It is unaffected by frequent starts/ stops of the flow - which was not the case with older flow technologies.
The bottom primary air flow through the different combustion zones of the grate needs to be controlled. OPTIBAR DP 7060 C with a 10 mbar cell is ideally suited for this low dP application as it is fully 3D-factory linearized over a wide dP, static pressure and temperature range offering superb long term field performance for any dP-Flow application. The grate is air or water cooled. The flow of the cooling medium needs to be monitored by an OPTIFLUX 2000 magnetic flowmeter for water or an OPTISWIRL vortex meter for cooling air.
Requirements
- MI002, AGA9, OMLR 137
- Advanced diagnostics
- Short straight pipe requirements
Recommended products and solutions
Requirements
- Compliance with local CT standards
- Fuel conditioning, flow measurement and safety functions
Recommended products and solutions
Requirements
- Varying media
- Dust and moisture
- Varying dielectric constant
Recommended products and solutions
Requirements
- Process control
Recommended products and solutions
OPTIFLUX 2000
Electromagnetic flow sensor for combination with IFC 050, IFC 100 and IFC 300 signal converters
Requirements
- Low maintenance requirements
Recommended products and solutions
OPTIBAR DP 7060
Differential pressure transmitter for flow, level, differential pressure, density and interface measurements
Requirements
- Process control
Recommended products and solutions
OPTISWITCH 6600
Capacitance level switch for hygienic and industrial applications
Requirements
- High temperature
- High pressure
- High dynamic flow rates
Recommended products and solutions
Requirements
- Dust concentration
- Elevated temperatures
- Big duct diameters
Recommended products and solutions
OPTIBAR DP 7060
Differential pressure transmitter for flow, level, differential pressure, density and interface measurements
Requirements
- Process control
Recommended products and solutions
Requirements
- Solids in fuel oil
Recommended products and solutions
Requirements
- Process control
Recommended products and solutions
OPTISONIC 7300
Ultrasonic flowmeter for natural gas, process gas and utility gas applications
Requirements
- Process control
Recommended products and solutions
Requirements
- Process control
Recommended products and solutions
OPTISWITCH 6600
Capacitance level switch for hygienic and industrial applications
Requirements
- Process control
Recommended products and solutions
OPTIFLUX 4000
Electromagnetic flow sensor for combination with IFC 050, IFC 100, IFC 300 and IFC 400 signal converters