bomba de pasta de FGD para centrais elétricas
INDÚSTRIA

Soluções de Bombas de Polpa para Dessulfurização de Gases de Combustão em Usinas Termelétricas

A slurry pump in a wet flue gas desulfurization (GFD) system must handle suspended solids, abrasion, corrosion and scaling. Limestone preparation, gypsum discharge, absorber auxiliary circulation and wastewater treatment place different demands on the pump.

Changyu Pump matches each duty to the actual slurry. We review solids concentration, particle size and shape, pH, chloride content, temperature, specific gravity, flow, head, NPSH margin, seal-water conditions and operating hours before recommending a model or material.

APPLICABLE FLUID

Power Plant FGD Pumping Applications

One wet FGD system contains several different pump duties. Limestone slurry, gypsum crystals, absorber auxiliary circulation, and FGD wastewater do not impose the same wear, corrosion, solids-handling or installation requirements.

Changyu Pump selects from the actual medium and hydraulic system rather than applying one pump to the entire desulfurization island. Large absorber main recirculation pumps always require individual engineering review.

Limestone Slurry Preparation / Gypsum Slurry Discharge / Absorber Auxiliary Circulation / FGD Wastewater & Sumps / Low-Flow Lime Dosing

Limestone Slurry Preparation and Transfer

Aplicação:

Limestone slurry is abrasive, prone to settling and capable of building deposits in low-velocity areas. Pump passages must tolerate solids, and the system should avoid long stagnant sections.

For a power plant FGD slurry pump handling limestone or lime slurry, UHB is evaluated for lower-temperature fine media where corrosion and wear occur together. PGY or PHH is preferred for denser slurry, higher flow, longer pipelines or more severe abrasion. ZJP-Z suits low-flow viscous lime dosing after hose compatibility is confirmed.

Bombas Recomendadas

Main selection factors

  • Concentração de sólidos e tamanho de partículas
  • Slurry specific gravity and settling tendency
  • Vazão necessária e altura manométrica total dinâmica
  • pH, chloride level and temperature
  • NPSHa and suction geometry
  • Seal water and shutdown flushing plan

Bomba de ácido fosfórico Série UHB

Bomba de ácido fosfórico da série UHB com revestimento em UHMWPE para manuseio de ácido fosfórico, ácidos corrosivos e polpas abrasivas contendo sólidos. Adequada…

Gypsum Slurry Bleed and Discharge

Aplicação:

Gypsum slurry contains abrasive crystals and can scale at the seal chamber, casing or pipeline during low-flow operation and shutdown. Reliable flushing and drainability are part of the pump solution.

UHB is suitable for fine crystalline gypsum slurry with corrosive liquid within its temperature limit. PGY is evaluated for higher-flow wear service, while PHH is used when abrasive gypsum transfer also requires higher head or a long discharge line.

Bombas Recomendadas

Main selection factors

  • Gypsum solids by weight
  • Crystal size distribution
  • Chloride concentration and pH
  • Temperatura de funcionamento
  • Flow, head and pipeline length
  • Shutdown flushing and drainability

Bomba de polpa abrasiva série UHB

A Bomba de Polpa Abrasiva da Série UHB da Changyu é uma bomba centrífuga de alto desempenho projetada para manuseio de meios corrosivos com alto teor de sólidos…

Absorber Auxiliary Circulation and Slurry Transfer

Aplicação:

Auxiliary circulation duties include absorber drain tanks, reaction tanks, emergency tanks and inter-stage slurry transfer. These pumps often operate continuously, but their flow is normally below that of the large absorber main recirculation pump.

PGY is evaluated for medium-to-large abrasive circulation with replaceable wet ends and multiple seal arrangements. PHH is suitable for higher-head auxiliary circulation or long-distance transfer. UHB is considered for lower-temperature corrosive fine slurry. Large absorber main recirculation pumps are not selected from a general product table; Changyu Pump must review the complete hydraulic duty, efficiency requirement, NPSHa, suction arrangement, slurry chemistry, motor margin, seal-water system and continuous-duty conditions.

Bombas Recomendadas

Main selection factors

  • Design, normal and minimum flow
  • Static and friction head
  • Slurry density, solids and particle size
  • pH, chloride and temperature
  • NPSHa and suction geometry
  • Seal-water system and wear-part interval

Bomba de polpa abrasiva série UHB

A Bomba de Polpa Abrasiva da Série UHB da Changyu é uma bomba centrífuga de alto desempenho projetada para manuseio de meios corrosivos com alto teor de sólidos…

FGD Wastewater, Sump and Sludge Transfer

Aplicação:

FGD wastewater may contain chlorides, fine gypsum, fly ash, suspended metals and treatment chemicals. A clarified stream and a settled sludge stream should not use the same pump by default.

CYE is evaluated for below-level wastewater pits requiring self-priming. UHB suits corrosive wastewater with fine abrasive solids. BFQ is suitable for intermittent sludge, variable flow or entrained air. FY is limited to compatible flooded-suction tank or pit duties.

Bombas Recomendadas

Main selection factors

  • Chloride concentration and pH
  • Concentração de sólidos e tamanho de partículas
  • Liquid level and suction lift
  • Temperature and specific gravity
  • Intermittent or continuous operation
  • Material and diaphragm compatibility

Bomba de polpa química horizontal da série UHB

A bomba de polpa química da série UHB apresenta revestimento em UHMW-PE e impulsor semiaberto, projetada para transferência de polpa corrosiva e abrasiva em aplicações químicas, metalúrgicas,…

Low-Flow Lime Dosing and Difficult Slurry Transfer

Aplicação:

Low-flow lime dosing can involve high viscosity, scaling, dry-run risk and variable solids. A large centrifugal slurry pump is not automatically suitable when accurate low flow is more important than capacity.

For a power plant FGD slurry pump duty involving viscous abrasive media, ZJP-Z is evaluated where self-priming and dry-running capability are important. BFQ or BFD diaphragm pumps can be considered for intermittent lower-flow transfer after diaphragm and valve compatibility are confirmed.

Bombas Recomendadas

Main selection factors

  • Required flow and discharge pressure
  • Viscosity and solids concentration
  • Particle size and settling tendency
  • Dosing accuracy
  • Dry-running requirement
  • Hose or diaphragm compatibility

How to Select a Pump for Power Plant FGD Service

The medium name alone is not enough for accurate power plant FGD slurry pump selection. Please provide the actual slurry and hydraulic data so that material, hydraulic size, seal arrangement and wear allowance can be checked together.

  • Solids concentration, particle size distribution and slurry specific gravity
  • pH, chloride concentration, temperature and other corrosive constituents
  • Design, normal and minimum flow plus total dynamic head
  • NPSHa, suction geometry, liquid level and installation position
  • Seal-water availability, operating hours, shutdown flushing and maintenance interval

Limites da seleção: Large absorber main recirculation pumps require a separate engineering review and cannot be selected from a general table.

Quick Selection Table for Power Plant FGD Duties

FGD dutyTypical challengeFirst pump to evaluateAlternativaDo not finalize before checking
Limestone/lime slurry transferAbrasion, settling, depositsUHB for fine corrosive slurry; PGY/PHH for heavier or higher-flow slurryZJP-Z for low-flow viscous dosingSolids wt%, particle size, temperature, flow, head
Gypsum dischargeCrystals, wear, scaling, chloridesUHB ou PGYPHH for high head/long lineCrystal size, chloride, pH, flush plan
Absorber auxiliary circulationContinuous duty, abrasion and corrosionPGYPHH ou UHBNPSH, seal water, chemistry, duty point
Large main absorber recirculationVery high flow, efficiency, NPSH, continuous dutyIndividual engineering review onlyProject-specific configurationComplete hydraulic and slurry data
FGD wastewater with solidsChlorides, fine solids, variable levelUHB ou ACEBFQ/BFD bomba de diafragmaChloride, solids, pH, suction lift, temperature
Sump or tank extractionFlooded inlet, limited floor spaceAF semi-submersible pump for compatible, relatively clean liquidACE where self-priming is neededImmersion depth, solids, material compatibility
Lime dosing/high-viscosity low flowScaling, dry-run risk, viscosityZJP-Z hose pumpDiaphragm pumpRequired accuracy, hose/diaphragm compatibility

Need a duty-specific recommendation? Send Bomba Changyu your slurry composition, flow, total head, temperature, solids wt%, particle size, pH, chloride, NPSHa, suction arrangement, seal-water availability and operating hours. We will review the duty and recommend the appropriate pump series, wet-end material and seal arrangement.

Why Choose Changyu Pump for FGD Slurry Duties

Duty-Based Selection

We separate clean seawater, abrasive construction water, dirty sumps and concentrated salt slurry, then match the hydraulic design and pump construction to each duty.

Material and Seal Review

Wet-end alloy, shaft seal, seal faces and elastomers are checked against chloride, temperature, oxygen, solids, treatment chemicals and required service life.

Hydraulic Verification

Flow, total dynamic head, NPSHa, tide range, suction lift, pipe losses and motor margin are reviewed before a pump model is confirmed.

Clear Engineering Boundaries

We identify when a standard Changyu series is applicable and when marine class, fire service, high pressure or very large intake conditions require project-specific engineering and certification.

Contactar-nos

Soluções de bombagem flexíveis, eficientes e totalmente personalizadas.

Procura a solução de bombagem perfeita para as suas necessidades específicas? A nossa equipa de especialistas fornece soluções personalizadas de bombas centrífugas adaptadas aos seus fluidos, condições de funcionamento e requisitos do projeto. Obtenha uma consulta personalizada e um orçamento hoje mesmo!

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FAQ

O UHB é avaliado para slurry de calcário fino ou cal a baixas temperaturas, onde corrosão e abrasão ocorrem simultaneamente. O PGY ou PHH é preferido para slurry mais denso, vazão maior, tubulações mais longas ou desgaste mais severo. O ZJP-Z pode ser considerado para dosagem de cal viscosa de baixa vazão após a compatibilidade da mangueira ser confirmada.

O serviço de recirculação principal de grandes absorvedores requer uma análise de engenharia separada. A Changyu Pump deve verificar o regime hidráulico completo, a meta de eficiência, o NPSHa, o arranjo de sucção, a química da polpa, os sólidos, a margem do motor, o sistema de água de vedação e os requisitos de serviço contínuo antes de confirmar se uma configuração específica do projeto é adequada.

Não. A concentração de cloreto, o pH, a temperatura, o oxigênio, os sólidos suspensos e os produtos químicos de tratamento devem ser analisados em conjunto. O aço inoxidável pode sofrer corrosão localizada em serviço com alto teor de cloreto, portanto, o material das partes molhadas e o tipo de bomba devem ser selecionados com base na composição real do efluente e nas condições operacionais.

Please provide the slurry or wastewater composition, solids concentration, particle-size distribution, specific gravity, pH, chloride level, temperature, design and normal flow, total dynamic head, NPSHa, suction geometry, liquid level, operating hours, seal-water availability and shutdown flushing plan.

UHB is suitable for fine crystalline gypsum slurry with corrosive liquid within its temperature limit. PGY is evaluated for higher-flow abrasive service, while PHH is considered when gypsum transfer also requires higher head or a long discharge pipeline. Final selection depends on crystal size, solids concentration, chloride, pH, temperature, flow and head.

ZJP-Z hose pumps can suit low-flow viscous lime slurry, scaling media or duties requiring self-priming and dry-running capability. BFQ or BFD diaphragm pumps can be considered for intermittent lower-flow wastewater or sludge transfer, entrained air or variable flow after diaphragm and valve compatibility are confirmed.

These FGD duties combine abrasive solids, scaling and wear. Changyu Pump therefore prioritizes slurry, self-priming, vertical, hose or diaphragm configurations matched to the actual duty rather than fluoroplastic centrifugal or magnetic-drive pumps.

PRODUTO

Recommended Power Plant FGD Pumps

These Changyu Pump series cover different slurry, wastewater, pit and low-flow duties. Final selection depends on chemistry, temperature, solids, flow, head, suction conditions, duty cycle and material compatibility.