For many years, Ftherm Machinery have been raising productivity, lowering production costs, and delivering Scraped Surface Heat Exchangers products with affordable price and excellent quality for a wide range of processing industries.
With Ftherm® SSHEs, companies in the food, chemical, petroleum, pharmaceutical, and allied industries have reduced labor costs and increased production efficiency.
Ftherm® SSHEs continue to replace many slow, inefﬁcient batching operations with more uniform, controllable, and repeatable continuous processing.
Ftherm® SSHEs’ superior heat transfer performance and ability to handle a wide range of viscosities makes it the clear choices over tubular or massive plate heat exchangers in viscous applications.
Standard Ftherm® X SSHE is a new type of scraped surface heat exchanger that can be used to heat and cool products of various viscosities, especially suitable for extremely viscous and viscous products. It has strong quality, economical hygiene, high heat transfer efficiency, and affordable features.
•Compact structure design
•Solid shaft connection (60mm) structure
•Durable blade material and technology
•High precision machining technology
•Solid heat transfer tube material and inner hole processing
•The heat transfer tube can be disassembled and replaced separately
•Gear motor drive - no couplings, belts or sheaves
•Concentric or eccentric shaft mounting
•GMP, CFIA, 3A and ASME design standard; FDA optional
Ftherm® SSHEs carries with it the reputation of durability that is unequaled. The Ftherm® HP SSHE is capable of heating and cooling products with viscosities in the 1,000,000 centipoise range. The units have high torque AISI stainless steel drive spline, can be equipped with direct drives with up to 30 HP (22kW) and are available with concentric, eccentric or oval heat transfer tubes to provide optimum processing conditions for any product. The motor pedestal is modiﬁed to use a larger gear drive with a 20 or 25 HP (18.5, 22 kW) Other mechanical features and most options are the same as the standard Ftherm® X SSHE.
•The overall dimensions of the unit and space requirements are the same as the Ftherm® X.
•The integral SEW gear motor drive with a stainless steel mounting pedestal
•The high pressure mechanical seal can provide pressure environment up to 8MPa（1160PSI）
Scraped Surface Heat Exchangers can be employed in the continuous, closed processing of virtually any pump able ﬂuid or slurry involving:
Ftherm® Scraped Surface Heat Exchanger components are manufactured in a variety of conﬁgurations and materials so that each unit can be assembled to meet the speciﬁc processing requirement of each application. All pressure elements are designed in accordance with GMP，CFIA，3A or ASME code requirements and can be FDA certiﬁed.
•Drives From 5.5 to 15 kW
•Wide range of output speeds(100~350rpm)
•Chrome-plated nickel or carbon steel, and 316 stainless steel heat transfer tubes specially designed for enhanced heat transfer
•Stainless steel or plastic blades, including metal-detectable plastic blades
•Mutator shaft diameter based on ﬂuid properties, (120, 130, and 140 mm)
•Single and double mechanical seals
Ftherm® Scraped Surface Heat Exchangers can be jacketed for liquid, steam, or direct expansion refrigeration.
232 psi (16 MPa) @ 400° F (204° C) or 116 psi(0.8MPa) @ 400° F (204° C)
Product Side Pressure
435 psi (3MPa) @ 400° F (204° C) or 870 psi(6MPa) @ 400° F (204° C)
Heat Transfer Tube
•Thermal conductivity and wall thickness are key design considerations in selecting heat transfer tubes. Tube wall thickness is precisely engineered to minimize heat transfer resistance while maximizing structural stability.
•Pure nickel tubes provide high thermal conductivity. The inside of the tube is hard chrome plated, then honed and polished to a smooth ﬁnish for resistance to wear from scraper blades and abrasive products.
•Chrome-plated carbon steel tubes provide high thermal conductivity at reduced cost for products like peanut butter, shortening and margarine.
•Stainless steel tubes specially designed for enhanced heat transfer are offered for acidic products and to provide ﬂexibility in the use of cleaning chemicals.
Ftherm® scraper blades are arranged on the shaft in staggered rows. The blades are held on the Ftherm® Scraped Surface Heat Exchanger shaft by strong, durable, specially designed “universal pins,” which are welded to the shaft. These pins allow quick, easy blade removal and replacement. A variety of blade materials are available, including metal-detectable plastic blades.
The Ftherm® mechanical seals were designed for easy assembly and maintenance, and for reliable operation. Replaceable seal faces in low-cost carbon and in durable silicon carbide materials are now available.
The amount of time the product is within the heat exchanger for a given rate is controlled by the volume of the unit. Small-shaft heat exchangers provide a large annulus for longer residence time, they handle lumpy products and those having large particles. Large-shaft heat exchangers provide a smaller annulus for high velocity and turbulence with high heat transfer rates and short product residence time in the unit.
The drive for the Ftherm® Scraped Surface Heat Exchanger is selected to provide optimum performance in each individual application and thus assure that the product is vigorously agitated and continuously removed from the heat transfer wall. Ftherm® Scraped Surface Heat Exchangers are furnished with direct drive gear motors with horsepower selection for optimum performance for the speciﬁc application.
Additional Application Data
Heat Sensitive Products– Products which are degraded by prolonged exposure to heat are effectively processed in Ftherm® X Scraped Surface Heat Exchangers. The scraper blades prevent product from remaining on the heat transfer surface by continuously removing and renewing the ﬁlm. Because only a small amount of product is exposed to heat for just a short time, burn-on is minimized or eliminated.
Viscous Products– Ftherm® X Scraped Surface Heat Exchangers process viscous products far more efﬁciently than conventional plate or tubular heat exchangers. Product ﬁlm is continually scraped from the heat transfer wall to induce high heat transfer rates; constant agitation causes turbulent ﬂow and more consistent heating or cooling; pressure drop is effectively controlled by the product annulus area; agitation eliminates stagnant areas and product build-up; and cleaning is easier.
Particulate-Laden Products– Products with particulates which tend to plug conventional heat exchangers are handled easily in Ftherm® X Scraped Surface Heat Exchangers, and the particulates maintain maximum product identify.
Crystallized Product– Products which crystallize are ideal candidates for Ftherm® X Scraped Surface Heat Exchanger processing. As product crystallizes on the heat transfer wall, the scraper blades remove it and keep the surface clean.
Chemical Processing– The chemical, pharmaceutical, and petrochemical industries can employ Ftherm® X general categories.
1. Heating and Cooling: Processing very viscous materials is not a problem for the Ftherm® X Scraped Surface Heat Exchanger. The product ﬁlm is scraped from the hot or cold tube surface many times a minute, preventing a fouled or frozen layer from forming to block further heat transfer. The total product ﬂow area is generous, so pressure drop is minimized.
2. Crystallization: The Ftherm® X Heat Exchanger can be used as a sidearm cooler, cooling a batch tank to the saturation temperature where solutes begin to crystallize. Recirculating through the heat exchanger at a high ﬂow rate produces seed crystals that grow large enough to separate after the ﬁnal temperature is reached. Waxes and other products that completely solidify can be cooled almost to the melting point in a one-pass operation, then ﬁlled into molds, deposited on cold belts, or pelletized using additional equipment.
3. Reaction Control: Chemical reactions can be driven by the controlled addition of heat using a Ftherm® X Heat Exchanger. For exothermic reactions, the heat exchanger removes the heat of reaction to prevent degradation of the product or unwanted side reactions. The heat exchanger can be operated at pressures up to 870 psig (6MPa).
4. Any of the Above with Aeration or Mixing: The Ftherm® X Heat Exchanger delivers intense mixing to the product as it ﬂows along the rotating shaft, so that a gas can be incorporated into a product at the same time that it is heated or cooled. A foamed material can be manufactured by addition of gas, rather than by relying on a chemical reaction to generate the gas bubbles as a by-product. The mixing action also promotes uniform distribution of crystals in a matrix or improves reaction kinetics by intimately mixing the reactants.
Additional Industrial Applications
Printing Ink Compound
Scraped Surface Heat Exchangers are cooling and crystallizing these products at many plants. Most commonly, polyethylene wax beads are dissolved in a hot carrier like linseed oil, varnish, or other solvent and then rapidly cooled. The wax crystallizes in numerous very ﬁne particles, trapping the liquid carrier in a soft paste. These products are blended with inks for high-speed printing presses, serving as an anti-smear agent where particle size is critical for best print quality.
Many chemical and polymer products solidify on cooling from high reaction temperatures. The shape and size of the particles depend on the ﬁnal cooling system employed – a ﬂaking roll, a belt cooler, or an underwater pelletizer are a few possibilities. A Ftherm® X unit can easily pre-cool even very viscous resins to near the melting point, so that the ﬁnal cooling system can operate at maximum capacity.
Scraped Surface Heat Exchangers are ideal for carrying out fast chemical reactions in a one-pass, continuous system when reactants are viscous or immiscible. Examples include sulfonation and nitration of organic compounds. Vigorous agitation produces a ﬁne dispersion of the reactants for maximum reaction rate, increased yield, and fewer side reactions. For reactions that proceed more slowly, likesome polymerizations, the Ftherm® X unit can be employed as a side-arm heat exchanger while reactants are recirculated around a batch reactor vessel.
Ftherm® X SSHEs provides an early process for continuous production of high quality lithium and aluminum complex lubricating greases. Modern batch and continuous grease processes have improved since then, but the Ftherm® X remains the best way to cool the grease before packaging. It can crystallize the solid-phase ingredients without fouling on the heat transfer surface, and the uniform treatment ensures a product with consistent physical properties.