Belt Press Filter Machine Mesh Belt Application: Tofu Pressing in Food Factories

Release time:

2025-11-20

To address the challenging operating conditions of high-pressure squeezing, intensive cleaning, and high tension inherent in tofu residue processing, Xiamen Citius has professionally upgraded its filter cloth structure and connection solutions: incorporating an anti-deformation weaving design, a reinforced food-grade connector system, and treatments that ensure durability against both cleaning processes and thermal stabilization.

In the food industry, soy products are among the most common and popular healthy foods. Among them, the production process of tofu places extremely high demands on equipment and materials, especially when it comes to Compression Molding Stage Industrial filter cloths and filter machine mesh belts play a decisive role. They not only affect the texture and moisture content of the product, but also directly impact the safety, stability, and production efficiency of the entire process.

 

01

Tofu Pressing: Traditional Techniques Meets Modern Upgrades


 

The basic production process of tofu includes: selecting beans, soaking, grinding into slurry, boiling the slurry, coagulating the slurry, and finally shaping and pressing. Pressing is a crucial step that determines the texture, moisture content, and flavor profile of the tofu. In traditional methods, manual wrapping and molding techniques are commonly used, whereas modern food factories typically rely on belt-type press-filter machines for automated, continuous pressing and shaping.

Compared to traditional manual methods, belt press filters offer the following advantages:

A .High degree of automation: Continuous production reduces human contact;

b . Pressure is evenly controllable: the pressing pressure can be adjusted according to product type;

c High efficiency and large output: Ideal for medium- to large-scale food processing enterprises;

d Clean, hygienic, and safe: Equipped with food-grade materials and a cleaning system.

 

02

The core function of industrial filter cloths and filter press mesh belts in the pressing stage


 

In a belt press filter, the filter cloth/mesh belt serves not only as a material support but also as the filtration medium and shaping tool. Its performance directly affects the evenness of tofu dewatering, the integrity of its shape, and ultimately, the quality of the final product.

A . Filtration effect

The filter cloth retains the solid components of the bean curd residue (tofu pudding) while allowing excess moisture to seep through, forming the foundation for completing the dehydration and shaping process.

b . Pressing medium

In the press roller system, the filter cloth bears various mechanical stresses, including conveying, tensioning, and compaction. It must possess excellent tensile strength and flexibility to prevent tearing, wrinkling, or misalignment.

c Food Contact Safety

Since it comes into direct contact with tofu ingredients, the filter cloth must meet food-contact material standards (such as FDA or GB4806), featuring properties like being non-toxic and odorless, easy to clean, and free from fiber shedding.

 

03

Design requirements for filter cloths specifically used in food factories


 

Xiamen Citius, a specialized manufacturing enterprise in the field of technical fabrics for filtration materials, boasts extensive experience in developing food-grade filter cloths. Tailored to the unique characteristics of tofu pressing processes, we recommend the following filter cloth design requirements:
 

Performance Metrics

Technical Requirements

Material Selection

Food-grade filter cloth, FDA-certified

Woven structure

Uniform density, precise pore control

Water filtration rate

Moderate filtration rate ensures even dehydration of the tofu during pressing.

Connection Method

The strength must meet the same level as the main structure; the joint reinforcement design should prevent deformation and fracture caused by stress concentration.

Surface Treatment

Improve demolding performance and reduce tofu residue; at the same time, enhance the dimensional stability of the filter cloth under high tension.

Washability

Capable of withstanding high-pressure hot water rinsing and repeated exposure to alkaline cleaning agents.

 


 

4

Technical Pain Points Under Poor-Quality Tofu Conditions and Citius' Optimization Solution for Xiamen Xedia


 

In the actual production process of tofu pressing, due to the high tension and high pressure inherent in the equipment itself, ordinary industrial filter cloths often encounter the following issues under tofu dregs operating conditions:

 

1: High tension causes overall deformation of the filter cloth

The tension system of the belt press filter continuously applies pressure to the filter cloth, and after a period of use, ordinary filter cloths are prone to:

· Longitudinal tensile deformation

· Surface warping and wrinkling

· Pore deformation caused by filtration leads to uneven dehydration.

This directly affects the integrity and water stability of tofu formation.


 

2: The joint experiences stress concentration, leading to deformation or even fracture.

The tofu production process involves long-term continuous operation and high pressing pressure, often causing joints in standard filter cloths to fail.

· Uneven stress causes distortion.

· The joint cannot recover after stretching.

· In severe cases, breakage leads to shutdowns.

Once the joint breaks, the entire equipment must be shut down for a fabric replacement, disrupting the production rhythm.


 

2: Frequent washing leads to filter cloth fatigue

Food factories have strict cleaning requirements, and filter cloths must withstand:

· Hot water rinse

· Alkaline Cleaning Agent

· High-frequency scraper and spray

The fiber structure of ordinary filter cloths can thus accelerate fatigue, become harder, and shorten their lifespan.

 

Xiamen Citius's Technology Adjustment Solutions Targeting Pain Points

To accommodate the special operating conditions of high-pressure squeezing, high-level cleaning, and high tension required for tofu residue processing, Xiamen Xiadias (Citius) The filter cloth structure and joint design have been professionally upgraded:

方案1: Anti-deformation Woven Structure

· Utilize a highly stable structure

· Tension is evenly distributed, reducing localized stretching.

· The pores remain stable even after prolonged operation.

→ Effectively prevents filter cloth from bending, deforming, and ensuring even dewatering.

 

方案2: Enhanced Food-Grade Connector System

Unlike ordinary filter cloths, Citiuss utilizes:

· Strengthen the edge reinforcement process

 

→ Joint strength increased by 30–50%, reducing the risk of fracture

 

方案3: Washable and Heat-Set Treatment

· Suitable for rinsing with hot water between 80–95°C

· Chemical-resistant cleaning agent

· Heat-setting process maintains dimensional stability

→ The filter cloth boasts a significantly extended lifespan and remains durable and resistant to fatigue over the long term.

05

Real-world application results and customer feedback


 

Xiamen Citius's food-grade filter cloths and mesh belts have been successfully applied in several large domestic soybean product enterprises, including automated tofu production lines, silken tofu pressing systems, and okara scrap recycling presses—demonstrating outstanding performance advantages.

A . Even pressing, intact filter cake, and a 5–10% increase in product yield;

b The filter cloth replacement cycle is extended by 30%, significantly reducing equipment downtime.

c Food safety standards have been successfully tested and meet requirements, supporting the certification needs of export-oriented enterprises.

d The filter cloth is easy to clean after use, leaves minimal residue, and maintains a high level of hygiene.


 

 

Conclusion

 

Filtering technology drives high-quality development in the food industry.

 

In the modern food industry, where safety, efficiency, and automation are paramount, filtration material technology continues to demonstrate its specialized value. For traditional foods like tofu, the use of high-performance filter cloths and mesh belts not only optimizes production-line efficiency but also ensures food quality and enhances brand reputation.

Xiamen Citius Filtration Materials Technology Co., Ltd. will continue to deepen its expertise in the food industry's filtration sector, providing customers with customized solutions, professional technical support, and a reliable supply capability—helping China's food industry achieve a comprehensive upgrade toward standardization and modernization.

Industrial filter cloth, belt press filter mesh belt, used for tofu pressing in food factories

Filter machine type: Belt press filter

Application Industry: Food Factory

 

 

 

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