Food grade phosphoric acid plant

Asia Chemical Engineering Co., Ltd. is one of the most reliable manufacturers and suppliers of Food grade phosphoric acid plants in China. Please rest assured to wholesale cost-efficient Food grade phosphoric acid plants from our factory. Good service and reasonable price are available.

Product Details

Name: Food‑Grade Phosphoric Acid Production Line
Capacity: 0.5‑15 ten thousand tons per year, customizable
EPC turn‑key project：raw material is wet‑process industrial phosphoric acid for deep purification, and can be matched with downstream food‑grade MCP and DCP. Overseas projects are adaptable to Africa, the Middle East and Southeast Asia.

Mainstream process route for food‑grade phosphoric acid production line: Wet‑process solvent extraction and purification process
Raw material source: Refined industrial phosphoric acid (75‑85%) as feedstock
Complete process: Pretreatment and sedimentation of raw industrial phosphoric acid → precision filtration for suspended solid removal → multi‑stage counter‑current solvent extraction → dilute phosphoric acid washing for impurity removal → back‑extraction with pure water to obtain dilute purified phosphoric acid → arsenic and heavy metal removal (sulfide precipitation) → precision filtration → degassing and stripping (removal of H₂S and solvent residues) → activated carbon decolorization → vacuum evaporation and concentration → finished food‑grade phosphoric acid storage tank → filling and packaging.

Main Equipment List for Food‑Grade Phosphoric Acid Production Line
1) Raw Material Pretreatment Unit
Rubber‑lined feed storage tank for industrial phosphoric acid, corrosion‑resistant transfer pump
Pretreatment settling tank, precision filter (ceramic membrane / plate‑and‑frame precision filtration)
Flocculant preparation and dosing system

2) Core Solvent Extraction Unit
Multi‑stage centrifugal extractor / mixer‑settler extractor (core equipment)
Organic phase storage tank, extractant recycling system
Washing tank, stripping tank; phase‑separation settling tank; rectifying‑desorption tower for organic phase recovery

3) Arsenic & Heavy Metal Removal and Filtration Unit
Enamel‑lined arsenic‑removal reactor (sodium sulfide dosed for arsenic and heavy metal removal)
Plate‑and‑frame precision filter (corrosion‑resistant filter plates)
Hydrogen sulfide degassing stripping tower, tail gas absorption system

4) Decolorization and Concentration Unit
Activated carbon decolorizing filter
Vacuum evaporation concentration unit (high‑purity graphite heater)
Circulating acid pump, condenser, condensate collection system

5) Finished‑product Storage and Filling Unit
Finished‑product storage tank for food‑grade phosphoric acid (enamel‑lined / titanium‑clad)
Automatic filling system: filling into food‑grade plastic drums, tanker loading
Tail gas treatment and wastewater treatment unit

6) Automatic Control and Auxiliary Facilities
DCS fully‑automatic control system; interlock for on‑line pH, colority, liquid level and temperature;
Complete series of high‑purity corrosion‑resistant pumps, valves and instruments; sampling and testing system.

Characteristics of Food‑Grade Phosphoric Acid Production Line
1. Using industrial phosphoric acid as raw material and adopting mature solvent extraction and purification technology, it requires lower investment and energy consumption compared with thermal‑process phosphoric acid;
2. Enamel, titanium and high‑purity graphite are adopted for all material‑contact parts in the whole process to prevent heavy‑metal pollution and meet the safety requirements for food additives;
3. The extractant is recycled with low loss; it can be connected to complete sets of food‑grade MCP/DCP units for downstream production;
4. Full‑set EPC services: process package design, equipment manufacturing, installation and commissioning, and personnel operation training;

Uses of Food‑Grade Phosphoric Acid Products
1. Beverage industry: Acidity regulator for carbonated beverages;
2. Food processing: pH adjustment for jams, condiments and baked foods;
3. Raw material for food‑grade phosphates: Production of food‑grade monocalcium phosphate (MCP), food‑grade dicalcium phosphate (DCP), sodium pyrophosphate and sodium tripolyphosphate;
4. Processing aid for wine‑making and oil processing.

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