Fully Automatic Candle Filter for Beer Filtration

Overview

The fully automatic beer filter candle filter is a closed-loop pressure filtration device. Its interior consists of multiple stainless steel candle filter elements, typically used in conjunction with diatomaceous earth (DE) or other filter aids for beer clarification and polishing filtration.
Core Function: Removes yeast, proteins, and suspended particles to enhance beer clarity and stability.

Key Advantages

Product Structure

Wedge-wire Candle Filter Element

Crafted from precision-welded stainless steel wedge wires, these filter elements form V-shaped gaps that deliver both mechanical strength and consistent filtration accuracy. Their unique surface promotes secure diatomaceous earth adhesion, enabling stable filter cake formation that captures impurities without compromising flow. Compatible with high-pressure backwashing and CIP processes, they eliminate fiber shedding and sanitary dead zones. As permanent fixtures with multi-year lifespans, they remove ongoing filter cloth costs and labor, providing a hygienic, cost-effective filtration solution.

Liquid Inlet Distributor

A specialized liquid inlet distributor at the tank bottom ensures uniform feed distribution. It guides the liquid smoothly from the conical base toward each filter candle, achieving balanced flow across all candles and consistent velocity at any tank cross-section. This promotes the formation of a uniform, dense pre-coat layer on the filter surfaces, significantly improving filtration efficiency. Additionally, the distributor prevents direct liquid impact on the candles, thereby avoiding disruption of the pre-coat filter cake.

Diatomaceous Earth Automatic Mixing and Dosing System

During the filtration process, diatomaceous earth can be added continuously while filtering. The diatomaceous earth, along with the suspended solids in the liquid being filtered, is intercepted and adsorbed by the candle filter elements, forming a fresh filter layer. Simultaneously, this process prevents the micropores of the new filter layer from becoming clogged, thereby maintaining optimal filtering performance, extending the filtration cycle duration, and providing reliable assurance for the total volume achievable in a single filtration run.

PLC Control Cabinet

The system operates fully automatically. When the pressure inside the filter vessel exceeds the set value (0.6 MPa), the control system automatically reduces the speed of the feed pump. This effectively stabilizes the filtration pressure, ensuring the filtrate remains consistently clear and transparent with stable quality. The equipment utilizes an efficient, low-water-consumption backflush jet system, capable of rapidly and thoroughly cleaning the filter candles.

Pipeline System

The entire pipeline system is constructed with SUS304 sanitary-grade stainless steel tubing, featuring mirror-finished inner and outer walls. The system is equipped with a sanitary four-way sight glass for process observation, high-quality pneumatic butterfly valves (for automatic control) and manual butterfly valves (for isolation maintenance). All pressure gauges are sanitary-grade shock-resistant stainless steel models, and the safety valves likewise meet sanitary standards. This configuration ensures both reliable operation and strict compliance with hygienic requirements.

Typical Application Scenarios

• Clarification filtration after primary fermentation.
• Fine filtration prior to dispensing from storage tanks.
• Stability filtration before bottling or filling.
• Clarification for premium craft beers

Selection Notes (Limitations)

• Equipment investment costs are relatively high. The automated control system, pressure vessels, and food-grade construction necessitate significant initial capital expenditure..
• Requires careful management of filter aids. Consumption of diatomaceous earth must be controlled; improper operation can compromise filtration efficiency and increase costs.
• Demands precise control of operating parameters. Improper regulation of differential pressure or flow rates may adversely affect beer flavor or filtration stability.