New Recausticizing Process Equipments

Recausticizing Process Equipments

Recausticizing Process Equipment - Flowsheet

Traditional Recausticizing Process Flow sheet 

Traditional Recausticizing Process - Flowsheet

 

Closed Type Pressure Recausticizing Process Flow sheet

Closed Type Recausticizing Process - Flowsheet

 

Clarifier

Clarifier is a cylinder vessel with conical bottom, and equipped with drive system and rakes. It applies to clarify green liquor or with liquor. It can separate the lime mud and degrees from the liquor with the help of gravity effect. Clarified liquor overflows from the top of the clarifier. Settled sludge at the conical bottom is collected to the center by rake mechanism. The sludge is pumped by sludge pump.

Clarifier

Advantage

–      The large scale clarifier’s rake adopts girder structure to increase the strength.

–      Torque value is used to control rake lift, alarm and switch off to prevent mechanism from damage due to two much slurry settlement.

Technical Parameters

Clarifier-Technical Parameters

 

Lime Slaker

In the alkali recovery Recausticizing plant, green liquor (Na2CO3) reacts with lime (CaO) to produce emulsion and discharge rejects in the emulsion.

Lime Slaker

Advantages

–          The improved feeding and venting structure reduces dust pollution.

–          For screw part, new sealing structure is applied to avoid leakage.

Technical Parameters

Lime Slaker -Technical Parameters

 

Causticizer

Emulsion’s Recausticizing reaction after lime slaker.

Causticizer

Advantages

–          New type axial flow agitator, reduce power consumption obviously.

–          Moderate agitation, keep mud with larger granularity.

Technical Parameters 

 Causticizer -Technical Parameters

 

Pressure Filter

 Pressure Filter

Advantages

–          Small floor space required, high capacity

–          Low solids content in the white liquor clarity ≤ 20 ppm

–          Enclosed operation, less pollution

–          Automatic controlled

Technical Parameters

Pressure Filter - Technical prameters

 

Precoat Filter

With the help of vacuum generated by vacuum pump, cloth & pre-coat layer are working as filtering media to obtain solid-liquid separation. Precoat Filters are mainly used to wash lime mud in Recausticizing plant. Better clarity and discharge dryness can be achieved through precoat technique at higher vacuum. Continuous renewal technique ensure precoat layer at good condition, lengthen its replace cycle, and guarantee stable capacity and dryness.

Precoat Filter

Advantage

–          Applied precoat technology & auto scraper discharging technology, better clarity, higher dryness, low residual alkali content.

–          Continuous renewal technique, stable dryness and capacity, extended precoat layer replacement period, improved production capacity.

–          Distribution valve without divided sections, increasing filter time and production capacity.

Technical Parameters

Precoat Filter -Technical Parameters

 

Lime Mud Disc Filter

Lime mud disc filter is mainly used for lime mud washing and thickening in Recausticizing plant. Its first purpose is to dewater lime mud; the other is to recover alkali. Compared with traditional drum filter, it possesses larger filtration area and production capacity. Partial structure modifications will make it applicable to media dewatering and solid-liquid separation in such industries as mining, chemical, pharmaceutical and food.

Lime Mud Disc Filter

Advantages

–          Fully enclosed design; reducing steam, dust pollution.

–          High automation, easy operation and maintenance

Technical Parameters 

Lime Mud Disc Filter - Technical Parameters

 

Pressure Disc Filter

As latest white liquor filtering equipment in recausticizing plant, Pressure disc filters fulfills solid-liquid separation by use of cloth and precoat layer with help of positive pressure from compressed air. It can achieve both functions of white liquor filtering and lime mud washing. It is an ideal substitute for white liquor clarifier, lime mud washer or pressure filter.

Pressure Disc Filter

Advantages

–          Enclosed positive pressure filtering technique, Increasing pressure difference, improved cake permeability and capacity per unit area.

–          Large capacity but low energy consumption, small floor space; enclosed running condition and no environmental pollution.

–          Disc type filter element and combined technology, increasing filter area, achieving both with liquor filtering and mud washing.

–          Innovated disc structure and scraper discharge mechanism, lime mud precoat technology, filtrate turbidity ≤ 20ppm.

–          Equipped air agitating device, it solves problems of space limit for mechanical agitating layout and unevenly distribution, so to effectively mix caustic emulsion and prevent lime mud settlement.

Technical Parameters 

 Pressure Disc Filter Technical Parameters

For further diskussions please contact us!   

 

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