Electrostatic Precipitator Recovery Boiler

The electrostatic precipitator puts into practice circular economy in the recovery boiler The electrostatic precipitator recovers the fly ash and the pulp boiling chemicals that leave the boiler with the flue gases and they are then recycled back to the pulp process

The basic design of an electrostatic precipitator is a row of vertical wires followed by a stack of plates oriented vertically typically 520 kg 1040 lb per ton pulp which is returned to the recovery boiler Electrostatic precipitators are now used on many new limekilns as well Figure 1711 Cottrell electrostatic precipitator

of electrostatic precipitators This systematic study examines the resistivity of recovery boiler precipitator ash as a function of electrical field strength time of exposure particle

Recovery boiler precipitators tend to suffer from corrosion of both the casingshell and internal components because the flue gas is high in acid and moisture content Wet bottom precipitators are especially susceptible to this problem

Dry and Wet Electrostatic Precipitators ESPs GE offers a wide range of robust costeffective and reliable electrostatic precipitator designs for a variety of applications Discover the advantages of our electrostatic precipitators

chlorides and potassium from the electrostatic precipitator ash The electrostatic precipitator ash from the recovery boiler contains five main components which result in different ionic alkali salts for example Na 2 SO 4 Na 2 CO 3 NaCl K 2 SO 4 K 2 CO 3 and KCl 2 Since chlorides and potassium cause corrosion and plugging in the recovery boiler they need to be separated from the process flow

The Coulomb force caused by the electric field causes the charged particles to be collected on the collecting plates and the gas is purified This is the principle of electrostatic precipitation and Electrostatic precipitator applies this principle on an industrial scale

Electrostatic Precipitator for Recovery Boilers for Papermills Internal parts such as electrodes are accurately installed in the concrete casing Electrostatic Precipitators for Ironworks We are supplying a large number of dry type and wet type electrostatic precipitators for various processes in the ironworks

Well suited for new boiler installations as well as retrofit applications For industrial installations the wet electrostatic precipitator provided by BW offers highly efficient control of submicron particulate heavy metals acid mists and condensed metal fumes and organics

Electrostatic precipitators ESP Fig 1711 consist of chambers filled with metal plates charged with high DC voltage 3000080000 V through which exhaust gases from the recovery furnace pass Electrostatic precipitators are now routinely used for the removal of pulverised fuel ash from the boiler

This paper discusses advanced designs for black liquor recovery boiler ESPs Using only commercially proven technologies such as ELEX rigid discharge electrodes and NWLs PowerPlus sets it is demonstrated how a stringent stack PM emissions standard of 0010 grainsdscf at 8 O 2 at conditions of 70 design flow through one chamber of a

Electrostatic Precipitator Removes dust from the flue gas Recovered dust is recycled to black liquor Precipitator efficiency determines dust load and opacity out the stack

Some of the first recovery units employed the use of Cottrells electrostatic precipitator for dust recovery Babcock Wilcox was founded in 1867 and gained early fame with its water tube boilers The company built and put into service the first black liquor recovery boiler in the world in 1929 2

After combustion the flue gases from the boilers are often passed through an electrostatic precipitator that uses static electricity to gather the fly ash much as a TV set collects dust on the screen

Electrostatic precipitators ESPs have been used for over 100 years to remove entrained solid particulates or fine mists from gas flows in the power cement metal production paper and other

recovery boilers in order to produce energy from the organic matter originating from wood and to recycle the inorganic chemicals back to the pulping process as

5 Construction Working Operation and Maintenance of ESPs Working of Electrostatic Precipitator An ESP works because of electrostatic attraction like charges repel unlike charges attract An ESP uses a high voltage electrostatic field to separate dust fume or mist from a gas stream

In recovery boiler retrofit cases there are three challenges for SCR SCR reactor inlet flue gas temperature probable SO2 in the flue gas and excess particulate

The Titanium boiler cleaning control systems from BW integrate and upgrade BWs legacy SentrySeries advanced sootblower controls and Power Clean intelligent sootblowing ISB systems into a modern platform The result is a system designed to provide flexibility and optimum boiler cleanliness in a userfriendly package

The XXL size recovery boilers are typically designed for high dry solids content high energy efficiency low air emissions and environmentally friendly process solutions

Another unbelievable problem was on a precipitator built by the same OEM as Case Studies 1 2 This precipitator was in a paper mill recovery boiler precipitator Once again there had been two or three previous field service visits by several of the OEM field service engineers

TYPICAL LIFE OF ELECTROSTATIC PRECIPITATOR INTERNALS Recovery Boiler Wet Bottom 415 Years Recovery Boiler Drag Bottom 1020 Years Oil Fired Boiler High Sulfur Oil 2025 Years Coal Fired Boiler High Sulfur Coal 2530 Years Coal Fired Boiler Low Sulfur Coal 3040 Years Combination Boiler WoodwasteOnly 3040 Years

previous mechanical configurations and 5 the twostage precipitator 6121 PlateWire Precipitators Platewire ESPs are used in a wide variety of industrial applications including coalfired boilers cement kilns solid waste incinerators paper mill recovery boilers petroleum refining catalytic

fume deposits in a recovery boiler Carryover ISP and fume particles form a stream of dust some of which is collected by ash hoppers at the bottom of the generating bank and economizer andor by an electrostatic precipitator prior to discharge of the flue gas to the atmosphere The recovered dust is mixed with strong black

An electrostatic precipitator ESP is a filtration device that removes fine particles like dust and smoke from a flowing gas using the force of an induced electrostatic charge minimally impeding the flow of gases through the unit In contrast to wet scrubbers which apply energy directly to the flowing fluid medium an ESP applies energy only to the particulate matter being collected and

Electrostatic precipitators ESPs dont do a very good job of collecting carbon these particles reentrain easily because their resistivity levels are low ESP performance starts to noticeably degrade and stack opacity levels to rise when the ash contains more than 10 percent unburned carbon

Kraft Recovery Boilers Precipitator Kraft Recovery Boilers Precipitator SKU C708 Duration 13 Minutes Payperview Payperview PPV format perfect for individual users The purpose of an electrostatic precipitator or ESP is to remove particulate matter or ash from combustion discharge gases This module describes the

Well suited for new boiler installations as well as retrofit applications For industrial installations the wet electrostatic precipitator provided by BW offers highly efficient control of submicron particulate heavy metals acid mists and condensed metal fumes and organics

Electrostatic precipitators ESPs are commonly used to control particulate emissions from recovery boilers in the kraft pulping process The electrical resistivity of entrained particulates is known to affect the performance of ESPs

Electrostatic precipitators ESP are used in most pulp mills to remove particulate from recovery boilers power boilers and lime kilns As environmental regulations have increasingly become stringent in recent years maintaining a high ESP performance is of vital importance in mill operation