Carbonation Systems
PUTSCH® is the leading manufacturer of juice purification installations in the sugar industry worldwide.
Consequent development of gas distribution systems and utilization of Richter tubes guarantee a highly efficient juice purification process. The efficiency of CO2 gas is considerably increased which reduces the
load on the CO2 pumps.
PUTSCH® carbonations use the Richter tube principal. The Richter tubes are placed parallel inside the carbonation tank. The gas outlet slots are facing down opposing the circulating juice mixture. A cleaning shaft with steel pins located under the gas outlet guarantees continuous cleaning of the slots. Each gas distribution tube has its own cleaning shaft with a separate drive.
A centrally located guide tube is mounted above the Richter tubes. The syrup mixture entering from below in combination with the CO2 creates a buoyancy effect. The difference in densities of the juice mixture in the guide tube and the juice in the ring space causes a strong circulation of the entire con- tent in the carbonation tank. This process is called loop (air lift) reaction and offers many advantages in the carbonation of highly viscose media in sugar refineries.
Consequent development of gas distribution systems and utilization of Richter tubes guarantee a highly efficient juice purification process. The efficiency of CO2 gas is considerably increased which reduces the
load on the CO2 pumps.
PUTSCH® carbonations use the Richter tube principal. The Richter tubes are placed parallel inside the carbonation tank. The gas outlet slots are facing down opposing the circulating juice mixture. A cleaning shaft with steel pins located under the gas outlet guarantees continuous cleaning of the slots. Each gas distribution tube has its own cleaning shaft with a separate drive.
A centrally located guide tube is mounted above the Richter tubes. The syrup mixture entering from below in combination with the CO2 creates a buoyancy effect. The difference in densities of the juice mixture in the guide tube and the juice in the ring space causes a strong circulation of the entire con- tent in the carbonation tank. This process is called loop (air lift) reaction and offers many advantages in the carbonation of highly viscose media in sugar refineries.
|
Advantages of PUTSCH® carbonation systems are:
|
Phosphatation / Flotation
Very few refineries still use the powder activated carbon / diatomaceous earth process as the only clarification system today: the chemical processes of phosphatation or carbonatation are generally used throughout the world. Therefore the removal and de-sweetening of muds has become a critical step for low cost sugar production.
In the phosphatation process phosphoric acid and calcium hydroxide are added to hot sugar liquor from the melter to form calcium phosphate crystals. Afterwards, the suspension is aerated to produce flocculated precipitate that floats to the surface of the liquor, where it can be scraped off. The efficiency of flocculation and the separation of scums can be improved by adding various polyacrylamides such as Talofloc®, Colorgone® or Taloflote®, which can also reduce sugar loss. A secondary clarification system is used for mud de-sweetening, followed by some type of filtration. The scums are de-sugared through a two or three-stage counter current system. Because of possible calcium phosphate after floc or residual solids from the main clarifier, many refineries prefer to protect their decolarization station with some sort of polishing filtration like deep bed filters.
Based on extensive experience with clarification of melt liquors and filtration of high brix sugar syrups, Putsch® has successfully modernized existing phosphatation/flotation technology. The existing counter current sweetening-off system is replaced by installing an automatic Putsch® Membrane Filter Press rendering effective scum de-sweetening, dry cake discharge and clear filtrate. Introducing the Putsch® Membrane Filter Press has proven great economical and pro- cess advantages to the phosphatation/flotation process. With the resulting clear filtrate after cake filtration, a further polish filtration with deep bed sand filters, cartridges or candle filters is not foreseen.
In the phosphatation process phosphoric acid and calcium hydroxide are added to hot sugar liquor from the melter to form calcium phosphate crystals. Afterwards, the suspension is aerated to produce flocculated precipitate that floats to the surface of the liquor, where it can be scraped off. The efficiency of flocculation and the separation of scums can be improved by adding various polyacrylamides such as Talofloc®, Colorgone® or Taloflote®, which can also reduce sugar loss. A secondary clarification system is used for mud de-sweetening, followed by some type of filtration. The scums are de-sugared through a two or three-stage counter current system. Because of possible calcium phosphate after floc or residual solids from the main clarifier, many refineries prefer to protect their decolarization station with some sort of polishing filtration like deep bed filters.
Based on extensive experience with clarification of melt liquors and filtration of high brix sugar syrups, Putsch® has successfully modernized existing phosphatation/flotation technology. The existing counter current sweetening-off system is replaced by installing an automatic Putsch® Membrane Filter Press rendering effective scum de-sweetening, dry cake discharge and clear filtrate. Introducing the Putsch® Membrane Filter Press has proven great economical and pro- cess advantages to the phosphatation/flotation process. With the resulting clear filtrate after cake filtration, a further polish filtration with deep bed sand filters, cartridges or candle filters is not foreseen.
