The Crown Cold Dehulling process is used when the customer has a grain dryer or conditioners already installed and they simply want to add aspiration to their system to create a high protein meal. The cold dehulling system will have the Crown Aspirator after the cracking rolls. In the Aspirator, the beans and hulls cascade downward releasing hulls from the meats. Re-circulated countercurrent heated air lifts the hulls separating the two products. After the Aspirator, the meats enter either an existing rotary conditioner or stack cooker for additional conditioning. In this conditioner, additional hulls are released from the meats.
This material is sent to the Aspirator. As in the Aspirator, the meats cascade downward, releasing the last remaining hulls. The heavier meats fall out the bottom of the Aspirator as the lighter material is lifted with the countercurrent airflow. In the Aspirator, warm air is again introduced to maintain proper extraction temperatures. The product lifted in the Aspirator and Aspirator is a combination of hulls and small meats that are separated in the Crown Secondary System.
A two deck Hull Screener is used to size the material in three cuts, hulls sent to hull processing, meats sent to flakers, and the middle cut, a combination of small meats and hulls cut is sent to a Crown Secondary Aspirator where the final fiber and hull fat separation is controlled.
In the Crown Aspirator, the beans and hulls cascade downward releasing hulls from the meats. Re-circulated counter current heated air will lift the hulls separating the two products. After the Aspirator, the meats enter either an existing rotary conditioner or stack cooker for additional conditioning. In this conditioner, additional hulls are released from the meats. This material is sent to the Aspirator. As in the Aspirator, the meats cascade downward, releasing the last remaining hulls. The heavier meats fall out the bottom of the Aspirator as the lighter material is lifted with the counter current airflow. In the Aspirator, warm air is again introduced to maintain proper extraction temperature. The product lifted in the Aspirator and Aspirator is a combination of hulls and small meats that are separated in the Crown Secondary System. A two deck Hull Screener is used to size the material in three cuts, hulls sent to hull processing, meats sent to flakers, and the middle cut, a combination of small meats and hulls. The middle cut is sent to a Crown Secondary Aspirator where the final fiber and hull fat separation is controlled.
The Crown Vertical Seed Conditioner (VSC) is a combination heater and dryer used on free flowing granular solids such as soybeans and rapeseed. Crown’s patented aspiration system dries the seeds by removing the free moisture brought to the surface during heating. A low-powered rotary style discharge creates a steady material flow to the plant with minimal electrical load requirements. In soybean applications, seeds up to 14 percent moisture can be fed into the VSC, eliminating the use of grain dryers for processing. The typical retention time in the VSC ranges from 25 to 35 minutes depending on the required results for conditioning, drying and heating. The VSC can be used for other applications including canola for pre-heating, final conditioning of soybean cracks prior to flaking in conventional dehulling systems, corn germ preparation, along with conditioning of many other oil seeds. With five (5) models available, Crown can supply VSCs from a plant capacity as low as 25 MTPD (metric-tons-per-day) up to 3,500 MTPD. The flanged heating section design gives customers the option to easily expand their plant by adding heating sections. The Crown VSC provides the greatest efficiency lowest installation operating costs of similar conditioning drying methods currently available. The VSC is also a main component of Crown’s industry leading dehulling systems.
Batches of pre-heated oil are charged to the Measuring Vessel where the oil is partially deaerated and dried. The batch is dropped into the Deodorizer at 15-20 minute intervals. There the oil is progressively deaerated, stripped, deodorized, heat bleached and cooled. The oil is pre-heated in the heat recovery tray with steam generated by hot deodorized oil in the pre-cooling tray. The coils of the trays are connected in a closed system partially filled with water. This creates a thermo effect that naturally circulates the fluid in the coils as it alternates between the liquid and vapor phases. The DiFlow stripping and deodorizing tray has three steam agitated sub-compartments. Steam is also injected in multiple lift tubes rising from the bottom compartment to the middle and top compartments. The oil collecting in the bottom is thereby rapidly recycled to the overlying compartments from where it cascades back to the bottom.
Between the compartments with the shallow layers, substantially increases the surface area of oil exposed to full vacuum and thereby improves the efficiency. Fatty acids and other materials, evaporated from the oil, are condensed by contact with recycled and cooled distillate in the Scrubber. The heating steam for the heating tray is supplied by a self-contained high pressure steam generating system.
The entire system operates under deep vacuum (1-3 mbar) generated by either a traditional vacuum system or an ice condensation system
- Flake bed is turned completely over, which allows solvent to contact flakes from all sides
- Self-cleaning drainage screens stationary, V-bar screens are swept cleaned by the continuously moving bed of material
- Incline of chain before discharge minimizes possibility of solvent overflow to Desolvenizer-Toaster
- Continuous discharge of flakes improves Desolventizer performance
- Easy to assemble, expand or relocate
- Consistent product quality
- Reduced solvent usage
- Low solvent carryover reduces both steam and hexane consumption in the Desolventizer-Toaster
- Lower power requirements
- Excellent component life
- Ease of operation
- High operating capacity
The Crown Model IV Extractor is a continuous counter current Immersion Type Extractor that employs a shallow bed approach to extraction. The Model IV Immersion Extractor is designed for granular materials that have a higher density than the solvent, and will therefore sink in the solvent. It does not use screens. The basic horizontal fabrication houses a unique, patented “en-masse” type conveyor system, which draws the material along the smooth extractor bottom. There, it is totally immersed in solvent flowing from the other direction. This means there is no problem keeping the solids wetted.
- Automatic level control with actuated gates, chutes or variable rotary valves means less operator attention required
- Unique counter-current flow
- Low horsepower-per-ton requirements
- Heavy-duty steam chests and robust computer-designed sweep arms
- Basket-type predesolventizing trays
- Large dome of DT for reduced dust carried out with vapors
- Patented Vapor Recovery System for even less steam use and lower solvent consumption
- Efficient, robust, reliable and simple to operate
- Significantly lower steam usage and distinctly lower solvent losses
- More stable meal temperatures in all lower trays allow a greater degree of safety. A drop in meal temperature in the top tray due to operation errors can also be recovered more easily in the second or succeeding trays
- The predesolventizing by the steam-heated trays reduces the amount of sparge steam required and also reduces the meal moisture proportionally, thereby reducing the steam usage in the meal dryer
If high-quality products and unbeatable efficiency are your top priorities, CPM (California Pellet Mill) has what you need for grinding, size reduction and beyond. Products engineered by CPM meet the demands of virtually every application in processing industries. You can depend on our equipment and expertise to help you grind, crush, crumble, break, flake, hull, hammer, shred, condition, pellet and cool just about anything. CPM is your one-stop equipment solution.