Indústria de Cloro-Álcali
INDÚSTRIA

Pumps for the Chlor Alkali Industry

O chlor alkali industry uses electrolysis to produce chlorine, caustic soda, and hydrogen from purified brine. Pumping systems are involved throughout brine preparation, chemical treatment, product processing, and wastewater handling. Depending on the process, pumps may handle chloride-rich brine, hydrochloric acid, caustic soda, sodium hypochlorite, chlorinated liquids, and corrosive wastewater.

These applications require careful consideration of chemical compatibility, temperature, concentration, solids content, leakage control, flow rate, and head. Changyu provides corrosion-resistant pump solutions for different chlor alkali process duties, with pump configuration and wetted materials selected according to the actual operating conditions.

Fluido aplicável

Chlor Alkali Industry Pumping Applications

Different sections of a chlor alkali plant handle very different fluids. Saturated brine containing salt mud, circulating electrolyte, high-temperature caustic soda with salt crystals, sodium hypochlorite, and hydrochloric acid all place different demands on the pump.

For this reason, Changyu selects pumps according to the actual process duty, not simply according to the chemical name. Solids content, temperature, chloride concentration, crystallization, leakage requirements, and the installation position of the pump all affect the final selection.

Changyu’s chlor alkali pump solutions cover key process sections including:

Brine Purification / Electrolysis / Caustic Soda Evaporation and Concentration / Chlorine Gas and Hypochlorite Handling / Hydrochloric Acid Synthesis

Brine Purification

Aplicação:

Brine purification is one of the first stages of pumping in chlor alkali production. Saturated brine may contain a certain amount of salt mud and other suspended impurities before and during purification. The pump therefore needs to cope with both corrosion and particle wear rather than treating the liquid as a clean chemical solution.

For brine containing suspended salt mud, the UHB Series corrosion-resistant slurry pump is a suitable option. The UHB series can handle corrosive slurry with solids content of less than 45%, making it more appropriate for this type of mixed liquid-solid service than a conventional clean-liquid chemical pump.

Recommended Pumps

Main selection factors:

  • Resistência ao desgaste
  • Saturated brine concentration
  • Salt mud and suspended solids
  • Teor de sólidos
  • Flow rate and head
  • Chloride corrosion

Bombas para polpas abrasivas industriais da série UHB

Bombas industriais de alto desempenho para polpas abrasivas, concebidas para fluidos corrosivos e abrasivos. Duráveis, personalizáveis, ideais para aplicações químicas, mineiras e de águas residuais. Solicite um orçamento hoje mesmo!

Bomba resistente à corrosão UHMWPE da série UHB

As bombas resistentes à corrosão da série UHB proporcionam uma transferência química estável para aplicações ácidas, alcalinas e de lamas nas indústrias química, de energia nova, metalúrgica, farmacêutica e ambiental.

Bomba de polpa abrasiva série UHB

A Bomba de Polpa Abrasiva Série UHB da Changyu é uma bomba centrífuga de alto desempenho projetada para lidar com meios corrosivos com alto teor de sólidos. As principais caraterísticas incluem um revestimento UHMW-PE espesso (8-20mm) para uma resistência extrema ao desgaste, um impulsor semi-aberto para evitar entupimentos e um vedante dinâmico tipo K para um funcionamento sem fugas. Amplamente utilizado nas indústrias de fundição, fertilizantes e tratamento de águas residuais.

Electrolysis

Aplicação:

The electrolysis section handles anolyte and catholyte containing chloride ions and, depending on the process location, free chlorine. Leakage control becomes particularly important when transferring aggressive electrolyte.

For these duties, a magnetic-drive pump can be considered where zero-leakage or reduced leakage is required. The final pump selection should be based on the electrolyte composition, temperature, flow, head, and material compatibility.

Bombas Recomendadas:

Main selection factors:

  • Chloride concentration
  • Free chlorine content
  • Temperatura
  • Requisitos de vazamento
  • Flow rate and head
  • Wetted material compatibility

Bomba centrífuga de acionamento magnético - Série CYQ

A bomba centrífuga de acionamento magnético da série CYQ da Changyupump oferece uma solução de bomba de acionamento magnético sem selo e bomba de processo químico, garantindo transferência de fluidos 100% livre de vazamentos para aplicações industriais exigentes.

Caustic Soda Evaporation and Concentration

Aplicação:

The caustic soda concentration section presents a different pumping challenge. The liquid can be hot and may contain NaCl crystals, so the pump must withstand both elevated temperature and potential crystallization or solids-related wear.

For high-temperature caustic soda circulation, Changyu recommends the CYG Series High Temperature Chemical Pump, with a working temperature of up to 150°C according to the pump configuration.

This application is different from ordinary caustic soda transfer. The pump is selected not only for NaOH compatibility, but also for the temperature and salt-crystal conditions in the circulation system.

Bombas Recomendadas:

Main selection factors:

  • NaOH concentration
  • Temperatura de funcionamento
  • NaCl crystal content
  • Circulation flow
  • Required head
  • Compatibilidade dos materiais

Bomba química de alta temperatura da série CYG

A série CYG da Chuangyu Pump é uma bomba química de alta temperatura de alto desempenho com um revestimento PFA moldado de 8-20 mm. Concebida para meios agressivos como o ácido sulfúrico e lamas abrasivas (até 40% de sólidos), funciona de forma estável entre -20°C e 180°C. Ideal para FGD, metalurgia e processamento químico.

Chlorine Gas and Hypochlorite Handling

Aplicação:

Chlorine handling involves conditions that differ from ordinary liquid chemical transfer. Wet chlorine and sodium hypochlorite require materials with good resistance to chlorine-containing and oxidizing media.

For sodium hypochlorite liquid handling, the FYH Series fluoroplastic submerged pump can be considered.

Bombas Recomendadas:

Main selection factors:

  • Wet chlorine or hypochlorite concentration
  • Oxidizing conditions
  • Temperatura
  • Installation depth
  • Resistência à corrosão
  • Gas-liquid conditions

Bomba semi-submersível de fluoroplástico da série FYH: Bomba química resistente à corrosão de alta eficiência

A bomba semi-submersível da série FYH da Changyu Pump é uma solução vertical de alto desempenho e sem vedação, concebida para a transferência de produtos químicos agressivos. Com um revestimento FEP resistente à corrosão e um impulsor aberto de equilíbrio duplo, lida com ácidos e sólidos concentrados sem fugas. Este equipamento com certificação CE suporta caudais até 400m³/h, proporcionando uma alternativa de baixa manutenção para ambientes industriais agressivos.

Bomba submersível resistente a produtos químicos da série FYH

A série FYH da Changyu Pump é uma bomba submersível resistente a produtos químicos de primeira linha com um design vertical sem escorva. Concebida para meios agressivos -20°C~90°C, possui um revestimento fluoroplástico de qualidade militar para garantir um funcionamento estável e de baixa manutenção nos poços industriais mais difíceis.

Hydrochloric Acid Synthesis

Aplicação:

Hydrochloric acid synthesis and handling require pumps that can withstand hydrochloric acid and associated chloride-rich conditions. Conventional metal pump materials may not provide sufficient corrosion resistance for these duties.

For hydrochloric acid transfer, a fluoroplastic-lined centrifugal pump is a suitable configuration where the process requires high corrosion resistance.

Bombas Recomendadas:

Main selection factors:

  • Concentração de ácido clorídrico
  • Temperatura
  • Caudal
  • Cabeça
  • Resistência à corrosão
  • Lining and seal compatibility

Bomba centrífuga de fluoroplástico da série CYF

A bomba centrífuga de fluoroplástico CYF foi concebida para o manuseamento de produtos químicos altamente corrosivos, como ácidos, álcalis, solventes e águas residuais. Com peças de fluxo revestidas a FEP, PFA ou PTFE, proporciona uma excelente resistência à corrosão, um funcionamento estável e uma longa vida útil. Amplamente utilizado nas indústrias química, de galvanoplastia, farmacêutica, metalúrgica e de tratamento de águas residuais. Fornecimento direto do fabricante na China com apoio à personalização.

Bomba centrífuga de transferência de ácido clorídrico série CYF

Bomba Centrífuga de Transferência de Ácido Clorídrico da Série CYF A bomba centrífuga de transferência de ácido clorídrico da série CYF da Changyu Pump apresenta construção de fluoroplástico de estágio único, oferecendo resistência à corrosão e tolerância a altas temperaturas. É ideal para transportar fluidos ácidos nas indústrias química, de galvanoplastia e petrolífera, servindo como uma bomba centrífuga altamente eficiente e estável. Introdução do Produto A série CYF…

How to Select a Pump for the Chlor Alkali Industry

The chemical name alone is not enough to determine the correct pump. Two pumps handling the same chemical can have completely different requirements when concentration, temperature, solids content, or installation conditions change.

  • The concentration of brine, NaOH, HCl, or sodium hypochlorite affects material compatibility and should be confirmed before selecting the pump.
  • Temperature is particularly important for concentrated caustic soda and evaporation processes. Higher operating temperatures can change material performance and pump operating conditions.
  • Salt mud and NaCl crystals introduce a wear component that does not exist in clean chemical liquid transfer. Pump construction and hydraulic design should therefore be considered together with corrosion resistance. For aggressive electrolyte and other hazardous chemical liquids, leakage control can influence the pump configuration. Magnetic drive pumps can be considered where this requirement is significant.
  • Some applications require a submerged pump rather than a conventional horizontal centrifugal configuration. Sodium hypochlorite handling is one example where installation conditions can affect the appropriate pump design.
  • The required flow rate and head determine the hydraulic performance needed from the pump.

These parameters should be confirmed together with the chemical and temperature conditions before final selection.

Pump Selection by Chlor Alkali Process

Chlor Alkali ProcessMeio BombeadoMain Pumping ChallengeBomba Recomendada
Brine PurificationSaturated brine + salt mudCorrosion + suspended solids + wearSérie UHB
ElectrolysisAnolyte/catholyteChloride + free chlorine + leakage controlMagnetic Drive Pump / CYQ Series
Caustic Soda EvaporationHot concentrated NaOH + NaCl crystalsHigh temperature + crystallizationSérie CYG
Chlorine & Hypochlorite HandlingWet chlorine/sodium hypochloriteOxidation + chloride corrosionFYH Series
Hydrochloric Acid SynthesisHydrochloric acid / HClForte corrosão químicaFluoroplastic-Lined Pump / CYF Series

Note: The pump should be selected according to the actual process conditions rather than assigning the same pump type to every chlor alkali application.

If you’re not sure how to choose, please contactar a nossa equipa, and we’ll get back to you within 24 hours.

FAQ

Different sections of a chlor alkali plant require different pump configurations. UHB pumps can be used for corrosive slurry duties such as brine containing salt mud, CYG pumps are suited to high-temperature caustic soda circulation, and FYH pumps can be considered for sodium hypochlorite and other submerged corrosive liquid applications. CYQ and CYF provide alternative solutions for specific leakage-control and fluoroplastic requirements.

For saturated brine containing salt mud or other suspended solids, the UHB Series corrosion-resistant slurry pump is a suitable option. The selection should consider solids content, chloride concentration, flow rate, head, and wear conditions.

The CYG Series High Temperature Chemical Pump can be considered for high-temperature caustic soda circulation. The pump configuration can handle working temperatures of up to 150°C according to the specified configuration. NaOH concentration, temperature, NaCl crystal content, flow, and head should be confirmed before selection.

The FYH Series Fluoroplastic Submerged Pump can be considered for sodium hypochlorite transfer where a submerged installation is suitable. Concentration, temperature, oxidizing conditions, installation depth, and gas-liquid conditions should be considered.

A fluoroplastic-lined centrifugal pump can be used for hydrochloric acid transfer where strong corrosion resistance is required. The CYF Series Fluoroplastic Centrifugal Pump can be considered as an alternative, with the final selection based on HCl concentration, temperature, flow, head, and material compatibility.

Yes. Magnetic drive pumps can be considered for suitable corrosive liquid applications where leakage control is important. In chlor alkali processes, they may be used for electrolyte and other aggressive liquid transfer depending on the medium and operating conditions.

Pump selection should start with the actual process conditions: pumped medium, concentration, temperature, solids content, flow rate, head, installation position, and leakage requirements. The pump material and configuration should then be matched to those conditions.

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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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Produto

Recommended Chlor Alkali Industry Pumps

Below are selected pump models for chlor alkali production and related chemical transfer duties. Each pump is suited to different process conditions, such as corrosive brine containing solids, high-temperature caustic soda, sodium hypochlorite, electrolyte, and hydrochloric acid. The final pump selection depends on the medium, concentration, temperature, solids content, flow rate, head, installation conditions, and leakage requirements. If you are not sure which pump is suitable for your process, contact us now.