candle filter

烛式过滤器

Products description:

In order to reduce the pollution caused by the open filter, and improve the dryness of the filter cake. We develop the closed candle filter.

Those pipes set up inside the filter is functional in different situation. Our candle filer is able to cope with many filtration applications, This is no driving equipment and it’s a simple mechanism. This filer can work automatically without any leakage.

This candle filter is designed in a compound quincunx and row pipe(stainless steel inside,filter cloth outside), the drain pipe in-middle can help drain the liquid kept in the filter pipe, when slag is discharged, the gas is used to blow back, the efficiency is much higher than other filters. This filter can be used in those materials with the impurity content from 0.1% to 50%.

Operating principle:

When the candle filter works, the materials will be send into the filter through the pump, the liquid in the materials will get into the center of the element after the filtering medium, gathering in the purified outlet, then discharged. Before the filter cake formed, the “purified liquid”can be filtered periodically, until the filter cake formed(can meet the filtration requirements), the the signal will be send to stop the circle operation, the purified liquid go to the next normal filter process through the valve.

After normal filtration for a period time, the filter cake reaches a certain thickness, feed charge door closed automatically, after the slag discharged completely, signal will be send by the system to blow back the gas to make the filter cake fall off. After blow-back, slag discharge outlet will be open to start deslagging. Outlet will be closed after going through this whole process. Then return to its initial state, ready for next filtration

Application:  

Biopharmaceuticals： fermentation extracts, antibiotics, anti-cantharidin, streptomyces, citric acid  

Chemical industry: Amine, Catalyst Recovery, Sulfuric Acid, Polyols, Titanium Dioxide, PTA Particles, Polyglycol, Potassium Carbonate  

Food and beverage: Apple juice, grape juice, raw syrup, fruit grape syrup, glucose syrup, sucrose, beer, olive oil, palm oil, soybean oil  

Metal processing:Cleaning agents, coal tar, machine cooling oil, sheet metal foil rolling oil 

candle filter is a batch-operated filter with candleshaped filter elements arranged vertically inside a pressure  vessel. The filter cake is formed on the outside of the filter  candles while the clear filtrate is discharged from the interior of  the candles through dip pipes. All the process steps are carried  out under pressure. The candle filter is used for clarifying liquids with a low solids  content. It is a compact unit, operates fully automatically and  allows high throughput rates, dry cake discharge and a wide  range of cake treatment options.

过滤器结构

High process versatility A variety of options are available for treating the filter cake,  enabling the individual process requirements to be met. The  cake can be washed or reslurried in one or more stages. Air,  nitrogen or other gases can be passed through the filter cake  to achieve a greater degree of dewatering. If required, precoat  filtration by means of filter aids is possible. Fully automatic operation The candle filter operates fully automatically. On completion  of a process cycle, the filter cake is separated from the candle  surface by backblowing and subsequently discharged. The  next cycle then begins. Safe pressure filtration system The entire filtration process takes place under pressure – up  to a pressure differential of 10 bar g – in a closed, gas-tight  system. This enables a BHS candle filter to be implemented  even where strict health and safety regulations apply. It is also  possible for products to be processed in an inerted or sterile  environment. No moving parts The BHS candle filter does not incorporate any moving parts.  This increases operational reliability and reduces maintenance  requirements. Where cake discharge is concerned, the special  surface configuration of each candle ensures that the cake is  completely removed and discharged downwards.






过滤原理：


        

Heel filtration device The heel filtration device enables the residual volume to be  processed on completion of the filtration cycle by means of  an internally filtering candle at the vessel cone. This ensures  complete heel filtration with a minimum of compressed gas. CIP system A CIP system is available for cleaning the filter interior, the  register pipes and the filter candles. A special design of the  candle filter with appropriate surfaces allows dependable  cleaning of all parts in contact with the product. Precoat or body feed A precoat or a body feet plant is used to suspend powdery  filter aid. The precoat plant operates in batch mode, whereas  the body feed plant runs continuously. They are of modular  design and comprise a storage tank, agitator, piping, fittings,  measuring instruments, steel structure and pumps. Tube sheet design for slurry discharge In the case of slurry discharge, the candles are mounted on a  tube sheet that separates the filtrate and suspension chambers.  The filter cake is discharged by backflush with filtrate. Under  specific conditions, the tube sheet design represents a costeffective solution. Further accessories BHS has the experience to integrate additional accessories into  the candle filter packages as required by the application, e.g.  polishing filters or activated carbon filters.