HIGH TEMP RENDERING

A & S THAI WORKS CO., LTD

High Temperature Rendering plants – HTR : High temp rendering process is a high evaporation and sterilising method of treating animal byproducts and originates from the world’s earliest rendering plants using batch cookers.

The HTR process includes the following steps:

The HTR process is especially suitable for deteriorated materials and mixed wastes.

  • The material is scanned for steel scrap in a metal detector, cut in a pre-breaker to 50 mm and then in a fine-breaker to 16 mm.
  • The material melts in the cooker and is cooked in a bath of hot tallow at high temperature 120- 130 degrees C. The cooker works like a large frying pan where the water is evaporated, and the greasy output (grax) is pressed in a high pressure press to extract most of the tallow.
    The hot tallow is clarified in a 2-phase decanter and separator/polisher. The press cake is cooled and ground in a hammer mill for storage as an animal feed component.
  • Wool or hair in the material is partlially hydrolysed due to the high frying temperature, and separated in the shaker screen before grinding to meal in the hammer mill.
Dryer
  • The advantage of the high temp process is that it is a simple process and that the cooker can be of relatively small size but with a high evaporation capacity up to 24 kg per m2 heating surface per hour.
  • The cooker in this plant has low wear, while the high-pressure press will have some wear and needs periodic maintenance and change of wear components.
  • Be aware that the steam consumption of the high temp process is higher than with a low temp plant of the same size, as it can only utilise the waste heat for general heating purposes, like making hot water for us at the abattoir. The high temp process uses about double the volume of steam compared to a low temp process, which can make use of a waste heat evaporator (WHE) to save energy.
    The HTR process is somewhat simpler than the LTR process, but not as energy efficient.

Technical Specification: ASTW LEAN FISH PLANTS (LFP) – the figures are estimates

Plant size Capacity tons input per 24 hr Steam Consumption ton/hr Recommended boiler size ton/hr at 10 bar Electric Consumption in kW Installed/load 70%
LFP 24
24 - 30 tons
0.9
1.2
60/42
LFP 55
55 - 60 tons
2.1
2.5
107/75
LFP 90
90 - 100 tons
3.4
4.5
142/99
LFP 120
120 - 140 tons
4.5
6.0
180/126
LFP 160
160 - 180 tons
6.0
8.5
235/165

Project Rendering plant

ACCESSORIES FOR HTR - HIGH TEMP RENDERING PLANTS

hogger

Pre heater

Press

Dryer

Meal cooler

HTR 5 installed in Australia, capacity 4-6 tons raw material input/24 hrs.
HTR 7 installed in New Zealand, capacity 6-8 tons raw material input/24 hrs.
HTR 10 installed in Australia, capacity 10-12 tons raw material input/24 hrs.
HTR 15 installed in Australia, capacity 14-16 tons raw material input/24 hrs.
3D Layout
for Lean fish meal plant