Food & Beverage Heat Exchangers

From thin juice to thick chocolate

Sanitary heating and cooling for brewing, sauces, syrups and juices

A food plant can run apple juice in the morning and fruit jam by the afternoon, and the two behave nothing alike in a heat exchanger. Juice is thin, goes turbulent at modest velocity and heats evenly. Jam, syrup, sauce and melted chocolate are thick, often carry solids or sugar that caramelizes on a hot surface, and need either more tube passes or a gentler heating medium to avoid scorching.

Enerquip builds stainless shell-and-tube units for both ends of that range, plus the equipment around them: bayonet heaters for tanks of viscous product, steam generators for plants that need on-site steam without a large boiler, thermal fluid heaters for cooking, baking and drying lines, and waste heat economizers that recover energy the process would otherwise send straight up a stack.

Brewing duties come up regularly in this work. Wort cooling, hot liquor tank heating and glycol-cooled product loops all fit the shell-and-tube format, and Enerquip builds them to ASME code, stamped where the jurisdiction calls for it. Stainless construction leaves nothing behind that would change flavor, color or aroma, which matters to a brewer as much as the duty itself.

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Why heat-sensitive food is sized differently

Heat treatment has two jobs that pull against each other. It must inactivate bacteria and extend shelf life, and it must do that without dulling color, flattening flavor or breaking an emulsion. The way through is speed: reach temperature quickly, hold only as long as the process requires, then cool before the product has time to change. An exchanger chosen on surface area alone tends to be long and slow, which is the opposite of what the product needs.

Our engineers size from the fluid. Viscosity at the inlet and outlet, solids content, the highest wall temperature the product tolerates and the allowable pressure drop all go into the thermal model before a shell diameter is picked. Sugar-heavy syrups and chocolate usually want hot water or a controlled-temperature thermal fluid rather than live steam. Juices and wort can take steam directly and benefit from a short, high-velocity tube path.

Brewing adds its own checks. A wort cooler sees hot, sugary liquid on one side and cold water or glycol on the other, so the tube side has to stay smooth enough to clean between brews, and in many jurisdictions the unit has to carry a stamped nameplate that a local inspector will accept. On an ASME stamped Enerquip unit a third-party inspector reviews the design and witnesses the hydro-test, which takes that question off the table at installation.

Bayonet heaters for viscous tanks

Some products should not be pumped through an exchanger at all. A thick sauce, a heavy syrup or a batch of chocolate is easier to heat where it sits, and a bayonet heater does that by putting a removable tube bundle straight into the tank through an existing flange or manway. Steam or hot water flows inside the tubes, the bundle comes out whole for cleaning, and a thermostat or thermowell can be added to hold the set point.

Brewing: wort, beer and cleaning

A brewhouse runs several heat duties everyday. The hot liquor tank needs brewing water held at temperature, wort is heated on the way to the kettle and cooled hard after the boil, and finished beer may be chilled for the bright tank or heated to pasteurize it. Plate units in these spots can foul with protein and hop debris, and their long gasket runs age under constant hot cycling. A sanitary shell-and-tube opens, cleans and reseals with little fuss, and the same design heats the brewhouse CIP solution.

Allergen and recipe changeovers

A plant that runs a peanut sauce and then a nut-free one has to show the line is clean between them, and the exchanger is part of that proof. Product-side surfaces that drain fully, and tri-clamp bonnets that come off for a look at the tube ends and tubesheet face, let QA confirm the wash worked before the next product starts. The CIP heater page covers the heater feeding that wash.

Recovering heat from the process

Cookers, ovens and dryers throw off heat that a waste heat economizer can put back to work, warming boiler feed, wash water or a CIP tank. Thermal fluid heaters do the reverse job, circulating hot oil in a closed loop to give a cooking, baking or drying line steady, uniform heat. Where neither unit touches product, both can be built without the cost of a sanitary finish.

Wort coolers, sauces and syrups

If its pressure and size bring it under your jurisdiction's pressure vessel rules, yes, and a stamp answers the question before an inspector or insurer asks it. Enerquip stock units are ASME code stamped and hydro-tested, and custom units can carry the stamp with a third-party witnessed hydro-test. An unstamped cooler bought for a new brewhouse can hold up the sign-off when the inspector will not accept it.

Product in straight tubes with a removable bonnet passes particulate that would bridge a narrow plate gap, and the tube diameter can be chosen around the largest piece in the product. Picking the smallest tube for heat transfer can leave seeds or pulp lodged at the inlet. Give us the particle size when you request a quote.

A bayonet heats the tank contents without pumping them, so a syrup too thick to circulate cold can still be brought up to temperature. Once it is warm enough to flow, an external shell-and-tube heater can take over the main duty. Many plants run both: the bayonet for start-up and holding, the external unit for throughput.

DUTY	EQUIPMENT	WHY IT FITS
Wort and hot liquor	Sanitary shell-and-tube	ASME stamped stainless with product in polished tubes and glycol or steam on the shell
Juice and thin liquid heating	Stock BEU heater	Steam-to-liquid U-tube heater in 304L with tri-clamp tube connections, often ready the next business day
Syrup, jam or chocolate tanks	Bayonet immersion heater	Heats the whole tank in place through an existing flange; bare tubes and hot water keep the wall gentle
CIP solution heating	Sanitary CIP heater	Finished to the standard of the line it cleans, with the wash solution in polished tubes
Cooker and kettle vapor	Vapor condenser	Condenses kettle vapor and reclaims volatile ingredients instead of venting them
Thermal fluid and heat recovery	Thermal fluid heater	Thermal fluid heaters and waste heat economizers outside the product zone, where a sanitary finish only adds cost

1-805-484-2992

From thin juice to thick chocolate

Sanitary heating and cooling for brewing, sauces, syrups and juices

Sugar and protein burn at the wall before the bulk heats

Product lines that fill fast

Sanitary construction you can see

Food and beverage duties, matched to equipment

Why heat-sensitive food is sized differently