ZL-20T 20 Ton Industrial FRP Counter Flow Cooling Tower - Agriculture Food Processing
For High-Temperature Short-Time (HTST) pasteurization in dairy processing, the ZL-20T SS316L upgrade supports:
HTST process: Milk heated to 72°C for 15 seconds, then rapidly cooled to 4°C using plate heat exchanger and ZL-20T cooling water.
Heat load: 1,000 L/hour HTST line cooling load: 1,000 × 4.186 kJ/kg·°C × 68°C ΔT = 285 MJ/hour = 79 kW peak. ZL-20T 70 kW undersized for peak HTST (requires ZL-60T or larger); suitable for batch pasteurizers (200-500 L batches).
Batch pasteurization: 300 L milk heated to 63°C for 30 minutes, then cooled to 4°C. Cooling load: 300 × 4.186 × 59 = 74 MJ per batch. ZL-20T covers batch cooling in 60-90 minutes.
Plate heat exchanger configuration: ZL-20T cools the water side of plate HX. Cooling water flow 16 m³/h at 5°C range provides necessary heat transfer.
Sanitary standards: SS316L upgrade required for direct dairy contact. Tri-clamp connections for CIP compatibility.
The ZL-20T integrates into dairy processing plant cooling systems:
Milk cooling: Bulk milk coolers from 35°C (cow temperature) to 4°C storage. ZL-20T supports farm bulk tank cooling at 500-1000 L capacity.
Cream pasteurization: Higher fat content requires gentler cooling profiles. ZL-20T 32°C leaving water maintains plate HX outlet temperatures within specification.
Yogurt incubation: After pasteurization, milk is cooled to 43°C for culture addition. ZL-20T control enables accurate incubation temperature.
Cheese making: Whey and curd cooling requirements vary. ZL-20T supports cheese vat cooling in artisanal operations.
Plant-wide cooling: Multiple ZL-20T units serve different processing areas (raw milk, pasteurization, packaging) with isolated cooling loops for sanitary compliance.
For dairy plants, ZL-20T SS316L upgrade is standard specification for sanitary compliance.
Brewery wort cooling uses ZL-20T SS316L upgrade for sanitary compliance:
Wort boiling to cooling: After boil, wort is cooled from 100°C to 20°C fermentation temperature. Cooling load: 500 L batch × 4.186 kJ/kg·°C × 80°C = 167 MJ per batch.
Plate heat exchanger cooling: Two-stage cooling (100°C to 50°C, then 50°C to 20°C) with ZL-20T providing cold water supply.
ZL-20T capacity: 167 MJ in 30 minutes = 9.3 kW peak per batch. ZL-20T 70 kW supports simultaneous batch cooling and fermentation temperature control.
Fermentation cooling: Active fermentation generates 5-10 kW per 1000 L fermenter. ZL-20T maintains 20°C fermentation temperature.
Sanitary design: SS316L upgrade and tri-clamp connections required for direct wort contact. CIP sanitization with 80°C hot water compatible.
For craft breweries, ZL-20T SS316L supports both wort cooling and fermentation temperature control in a single tower.
The ZL-20T SS316L upgrade complies with FDA 21 CFR for indirect food contact:
FDA 21 CFR 174-179: Indirect food contact materials requirements. SS316L stainless steel complies with FDA standards for surfaces contacting food or food packaging.
3-A Sanitary Standards: Optional 3-A certification for dairy and food processing equipment. ZL-20T SS316L upgrade meets 3-A sanitary criteria for cleanability.
EHEDG guidelines: European Hygienic Engineering and Design Group guidelines for sanitary equipment. SS316L electropolished surfaces comply with EHEDG cleanability requirements.
NSF certification: Optional NSF certification for North American food processing installations.
For food processing facility compliance, the ZL-20T documentation package supports HACCP and GMP audit requirements.
ZL-20T SS316L supports CIP sanitization cycles in food processing:
CIP cycle parameters: 80°C hot water for 30 minutes, 200 ppm chlorine solution for 30 minutes, or 121°C steam for 30 minutes (SS316L only).
Piping integration: Tri-clamp sanitary fittings enable rapid connection to CIP supply and return headers. CIP skid or portable CIP unit compatible.
Cycle frequency: Daily CIP after processing run. Weekly deep sanitization with chemical sanitizers. Monthly inspection for biofilm and mineral deposits.
Heat-up time: ZL-20T and connected piping hold approximately 500 L of water. Heating to 80°C requires 30-60 minutes with facility hot water supply.
Sanitization verification: ATP swab testing after CIP cycle confirms effective sanitization. ZL-20T SS316L surfaces support ATP testing protocols.
For food processing facility compliance, ZL-20T CIP-compatible design meets food safety modernization requirements.
Beyond process cooling, ZL-20T supports refrigeration condensers in food facilities:
Brewery glycol chiller condenser: Brewery fermenters require 0°C glycol chilling. ZL-20T provides condenser water for brewery chiller system.
Cold storage facility: 4°C cold storage rooms require refrigeration. ZL-20T supports condenser loop for cold storage chillers.
Ice bank cooling: Some dairy plants use ice banks for milk pre-cooling. ZL-20T supports ice bank refrigeration condensers.
Plate freezers: Industrial plate freezers for seafood and meat processing. ZL-20T provides condenser water for plate freezer refrigeration circuits.
Plant-wide cooling integration: ZL-20T serves both process cooling (pasteurization, brewing) and refrigeration cooling with appropriate flow distribution.
For food processing facilities with diverse cooling needs, the ZL-20T 16 m³/h flow supports multiple downstream cooling applications.
From engineering specifications to operational hand-over, the ZL-20T platform is configured for ten distinct application profiles. Explore the other nine below:
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