This paper discusses thin-cake candle filter technology as an alternative to filter presses and bag and filter cartridges for removing solid contaminant fines from the water streams. These contaminants originate from various sources and are generally less than 1 micron (um) in size, which makes their removal very difficult. Candle…
Generally, the first step after the reaction is a bulk separation process that removes large, coarse solids (larger than 5 µm). This is relatively straightforward, but as processes have become more sophisticated and quality requirements have tightened, it has become necessary to remove residual particle fines from slurries. These particles…
This article will follow the process filtration approach developed for each technology stage gate starting from batch filtration in the lab to continuous filtration for the full-scale commercial operation. The article begins with a discussion of each stage-gate and how to avoid the “cookie-cutter” approach to these types of projects.…
In many chemical and pharmaceutical processes, solid-liquid separation, cake washing and drying steps directly impact the effectiveness of the production operation. Further complicating these operations is the nature of the process and especially if the process is air-sensitive or toxic. Process engineers devote much of their time to analyzing these…
In the manufacturing of chemicals, petrochemicals, pharmaceuticals, etc., after the initial mixing-reactions, there is always the necessity to remove the mother liquor from the process slurry. In some cases, the liquid is the valuable component, some cases it is the solids and in other cases it is both compounds. The…
For the transport of Liquefied Natural Gas (LNG), monoethylene glycol (MEG) is injected as corrosion inhibitor and to reduce the freezing point of the water in the LNG. In the reclamation unit, rich MEG is converted to lean MEG. During MEG reclamation, the divalent salt concentration increases and these salts…
BHS presentation focuses on a combined two-stage filtration process producing clean filtrates to 0.5 um with concentrating candle filters. The second stage is a pressure plate filter for final cake washing and drying. The benefits are clean filtrates with less water usage and less compressed gas usage. This is a…
Removing acid gases and gas dehydration from gas streams is becoming more important as stricter environmental rules are being developed and gas streams are being developed off-shore for LNG. Candle filter technology and the process of thin-cake building, is a new approach for high-efficiency and cost-effective fines removal. The presentation…
The presentation will discuss lab testing, pilot testing, scale-up, installation and performance guarantee for the BHS candle filter technology. The overall scheme can be used by process engineers to develop optimum filtration solutions for pressure or vacuum, batch or continuous and high-solids to clarification applications. This customer presently filters a…
In the manufacturing of chemicals, petrochemicals, pharmaceuticals, bioenergy etc., after the initial mixing reactions, there is always the necessity to remove the mother liquor from the process slurry. In some cases, the liquid is the valuable component, in some cases it is the solids and in other cases it is…
This paper discusses thin-cake candle filter technology that is used to remove trace amounts of solid contaminant fines from the recirculating fluid streams in amine, glycol and water scrubbers. These contaminants originate from various sources and are generally less than 1 micron (um) in size, which makes their removal very…
Removing acid gases from refinery off-gas streams is becoming more important as stricter environmental rules are being developed. One critical aspect of acid gas removal is the solid-liquid filtration technology that is used to keep the recirculating fluid free of solid contaminant fines. Filtration provides the following benefits of keeping…
Published in the March 2006 Issue of PharmaChem, Milano, Italy (PDF) Abstract: Candle Filters and Pressure Plate Filters are installed for clarification and recovery applications from liquids with low solids content. The candle filters are vertical candles while the pressure plate filters are horizontal plates and both are designed for…
This article discusses how the use of thincake vertical candle filters and horizontal pressure plate filters can efficiently remove activated carbon, metal catalysts, and trace insolubles from Active Pharmaceutical Ingredient (API) slurries. This is a PDF document: click here to download and view this document.
Abstract: The BHS technologies of Vertical Candle Filters and Horizontal Pressure Plate Filters provide improved product quality with more efficient operations compared with manual pressure filters. The different technologies allow for the selection of the optimum process solution depending upon the cake characteristics and cake structure. Fully automatic operations provide…
Abstract: The need for filtration systems in scrubbing units has been well documented. Filtration provides the benefits of reduced hot spots in the regenerator reboiler, reduced heat exchanger fouling and reduction of foaming in the absorbers. This paper discusses thin-cake candle filter technology that is used to remove trace amounts…
Abstract: The BHS technologies of Vertical Candle Filters provide improved product quality with more efficient operations compared with filter presses and manual plate filters. Fully automatic operations provide for complete containment of the solids and liquids for reduced maintenance costs and overall project savings. For the PDF version of this…
In the present process, the pharmaceutical slurry goes to a centrifuge for separation and washing and the cake is discharged as the product. The centrate of the centrifuge is discharged as a waste material. However, the centrate contains soluble product which is presently lost. The purpose of this project is…
