Rhodimet® AT88 equipment designing: DIM (Design Implement Monitor) good practices
Commissioning of liquid OH-Methionine application equipment at the feed mill
Compliance with all good practices must result in an installation of liquid OH-Methionine application system at the required quality level. But the feed manufacturer, or a third party, must imperatively commission it.
This step should answer 3 questions:
The last validation step is the conformity and homogeneity test. This “Mixer Profile” service may be offered by Adisseo to its customers.
Access other Good Practices here below:
Designing of liquid OH-Methionine application equipment in a feed mill starts with Customer’s needs assessment
|Overall, even if all feed mills in the world share the main principles of the manufacturing diagram stages (raw material reception and storage, dosage, grinding, mixing, pelleting…etc.), they are all different.
Indeed, during the feasibility visit (first step of the project), Adisseo technologist takes into consideration many criteria: current and future volume of production, types of feed, number of mixing lines to be equipped, existing liquid equipment, space availability…
Climatic conditions, quality standards, preferences in term of dosage principle (flow meter or weighing scale) also varies lot from a region to another.
Moreover, the yearly estimated consumption of OH-methionine determines significantly the mode of delivery and storage (IBC, bulk) and at the end of the day the envelop of the investment.
What are the expectations towards a liquid OH-Methionine distribution equipment supplier?
Adisseo wants to provide to his customers not machines but a SOLUTION that works (in terms of safety, quality, reliability and cost).
It should propose good quality parts and propose perfect assembly and interface with the existing process.
Once the quotation is accepted and the goods well arrived, the installation can start! The delay between reception and works start should be agreed in advance with the customer and should not exceed 2 months.
Guidelines for Unloading and Storage of liquid OH-Methionine in the feed mill
The choice on the storage type mainly depends on the consumption (tons per month) and local logistic conditions of liquid OH-Methionine. This product can be delivered in 1 m3 IBC (1,200 kg). IBCs can be used as such or transferred for intermediate bulk storage. For higher consumption, the product would be directly delivered in bulk.
A panel with safety labels will warn the drivers and plant staff. The installation of a safety shower is recommended.
Guidelines for Transfer and intermediate storage & heating of liquid OH-Methionine in the feed mill
|An intermediate storage of liquid OH-Methionine located inside the plant is recommended in two cases: when warming up the product is needed (>15°C for proper viscosity for spraying) and/or when more than one mixer needs to be fed. This daily tank (1 to 2 m3) may be heated thanks to circulation of thermal oil in a double jacket, this oil being heated with thermal resistances.
For piping connections, welding or press-fitting are preferable. Proper supporting will prevent from excessive mechanical stress and vibrations which could lead to leakages.
For cold environments, pipes will be insulated and, optionally surrounded by self-regulating heating cables.
Guidelines for proportioning and dosage of liquid OH-Methionine in the feed mill
|The scale system has the same principle as for solid dosage. In general, the liquid flows by gravity from a storage located above through a valve to the weighted liquid bin. This dosage bin can also be fed thanks to a transfer/dosage pump. As for any scale, its volume must be adapted to the quantities to be dosed and the load cells must have the expected accuracy (about 0.5-1% maximum of the minimum quantity).
The scale can be emptied by compressed air, or much more ideally with a dosing pump.
This dosing pump should be adapted to viscous products. Gear or screw type pumps generally fit well. Its capacity (liters/hours) should be calculated according to the targeted flow of injection in the mixer, and even oversized (rotation speed may be reduced to increase the life time).
The flow meter, whatever its type (mechanical, electromagnetic or mass), must be located close to the mixer, with easy and direct access.
A calibration valve must be located just after the flow meter to enable the verification of the dosed quantity.
Guidelines for spraying liquid OH-Methionine in the feed mixer
|The spraying step is the most important one regarding proper application and homogeneity of the OH-methionine into the feed. Ensuring proper spraying means: obtain the right size of droplets, have sufficient spraying time, spray directly on the feed, avoid dripping and blockage of the nozzles. The spraying pressure is of high importance and should be between 3 to 5 bars in general.
The way to obtain these results is to select:
Placing an electro valve before each nozzle can be an option if there is a risk of dripping and if it is needed to make vary the number of injection points (when quantities can vary a lot from a batch to another).