BK Roasting and Baking System

SORGO BK roasting and baking systems combine a highly insulated stainless steel chamber with high process temperatures and reversing cross-flow air circulation. Temperature, airflow and humidity are matched to the product and the desired roasting, cooking or baking result. Typical products are Leberkäse (meat loaf), crusted ham, roasted and baked products and hot-air cooked products. Coordinated parameters give repeatable programmes.

Reversing cross-flow

The process air flows horizontally through the products over the full trolley height and returns on the opposite side. Pneumatically controlled reversing dampers automatically alternate the flow direction between left and right. Each trolley position has its own circulation fan; stepless air circulation via frequency inverter is optional, and air discharge can be adjusted by section.

Three air supply designs are available, chosen for product, load and process:

• Adjustable air slots – air from the left, right and centre; slot height, number and setting follow the rack levels and trolley loading.
• Perforated sheet – specially shaped perforations direct the conditioned air into the chamber.
• Nozzles – specially shaped nozzles direct the conditioned air precisely into the chamber.

Chamber details

• Fully insulated entrance door with continuous silicone seal and robust latch.
• Air discharge zones matched to trolley loading and occupied rack levels.
• Fold-down drip tray giving access to the upper part of the system for inspection and maintenance.

Heating

The heat source is chosen to match the plant's energy supply:

• HP steam: finned-tube coil built in-house by SORGO from stainless steel 1.4301. The spiral fins give a far larger heat-transfer surface than smooth tubes and therefore a higher efficiency.
• Electric: heating coil made entirely of chromium-nickel steel 1.4876, installed in the upper part of the system.
• Gas or oil: SORGO tubular heat exchanger of thick-walled, heat-resistant steel 1.4876 in the upper part of the system, fired by a high-performance gas or oil burner and designed for low flue-gas temperatures.

Supplementary electric heating is available as an option, for example for weekend operation without steam, for using solar power or for specially designed higher process temperatures.

Optional CIP cleaning

• One central cleaning station supplies several connected systems and cleans them automatically one after another.
• Detergent dosing adjustable from 1 to 10 %.
• A stainless steel booster pump delivers approx. 10 bar cleaning pressure, independent of the mains water pressure.
• Automatic fresh-water rinse after cleaning and contact time.

Installation and system floor

Three floor designs are available:

• Standard floor: the chamber stands on a finished production floor of sufficient load-bearing capacity; an entry lip or a made-to-measure entry plate gives a safe transition. Simplest building preparation.
• Recessed, flush with the floor: the system is set into a floor opening, levelled with four adjustment screws and grouted with fluid concrete, so heavy trolleys can be pushed straight in.
• Hygienic floor with underfloor cleaning: a sealed, welded system floor stands on adjustable feet in a hygienic tray; two upward-facing nozzles rinse the area underneath.

All three variants can be reinforced for loads of up to 3 tonnes per trolley position.

Control

The system is operated with the SORGO SCS X1 control on a 15.6-inch industrial touchscreen with storable programmes and precise process control. SORGO INSPECT adds central process documentation, and remote operation from a smartphone or tablet is optional.

Sizes

Nine sizes from BK3000 to BK36000. With electric base heating (30 kW per trolley) the chamber reaches up to 150 °C; for 180 °C and above the electric heating capacity is increased. The table shows the electric version up to 150 °C; the connected load includes air recirculation and auxiliary loads.

All table values are guidelines for the standard configuration; every SORGO system is designed and built individually for the product, process, capacity, installation and available utilities.