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What are the applications of non tiled ultra wide non-metallic shells in the chemical industry

source：www.gusiapp.cn  |  Release time：2025年10月09日
        Non tiled ultra wide non-metallic shell refers to an integrated container or structural component made of non-metallic materials (such as fiberglass, polyethylene, polypropylene, polytetrafluoroethylene, carbon fiber composite materials, etc.) as the substrate, without the need for additional ceramic tiles (the anti-corrosion layer commonly used in traditional metal/concrete shells), and with a large width or diameter of a single device (usually ≥ 3 meters, some can reach more than 10 meters). Its core advantages are strong corrosion resistance, lightweight, flexible molding, and no risk of tile detachment. It is suitable for the pain points of "strong corrosive media, large volume demand, and long-term stable operation" in the chemical industry. The specific application scenarios are as follows:
1、 Strong corrosive medium storage: replacing traditional metal/concrete storage tanks to avoid corrosion and detachment risks
      In the chemical industry, the storage of strong acids (sulfuric acid, nitric acid), strong bases (sodium hydroxide, potassium hydroxide), strong solvents (chloroform, toluene), and fluorine-containing/chlorine containing media are the core application scenarios for non-metallic shells that do not require tiling and are particularly suitable for large volume storage needs
1. Acid and alkali storage tanks (such as 30% sulfuric acid storage tank, 50% sodium hydroxide storage tank)
      Traditional pain points: Metal storage tanks (carbon steel, stainless steel) are prone to acid and alkali corrosion and require frequent application of anti-corrosion coatings; Concrete storage tanks need to be tiled with acid resistant tiles, but the adhesive joints between the tiles are prone to aging and leakage. In addition, when tiling ultra wide storage tanks (with a diameter of ≥ 5 meters), the tiles may fall off due to deformation of the shell, causing medium leakage.
Advantages of non-metallic shell:
      Using fiberglass reinforced plastic (FRP) or polypropylene (PP) materials, the acid and alkali corrosion resistance life can reach 10-15 years (FRP resistant to sulfuric acid concentration ≤ 98%, PP resistant to sodium hydroxide concentration ≤ 50%), without the need for tiling;
      It can be integrated into an ultra wide storage tank (diameter 8-12 meters, volume 50-500 cubic meters), without joints or the risk of tile detachment, suitable for centralized storage of acidic and alkaline raw materials in chemical parks (such as sulfuric acid storage tanks in fertilizer plants and hydrochloric acid storage tanks in electroplating plants).
2. Solvent and organic medium storage tanks (such as methanol, ethanol, chlorobenzene storage tanks)
      Traditional pain points: Metal storage tanks are prone to swelling or corrosion by organic solvents (such as chlorobenzene corroding stainless steel), and ceramic tile coatings cannot withstand solvent penetration; Small capacity plastic storage tanks (diameter ≤ 2 meters) cannot meet the storage needs of large-scale production.
Advantages of non-metallic shell:
      Choose polyethylene (PE) or polytetrafluoroethylene (PTFE) lined fiberglass material. PE is resistant to swelling in most organic solvents, while PTFE can withstand strong corrosive solvents such as chloroform and carbon tetrachloride;
      The ultra wide design (diameter 5-8 meters) can achieve storage of 100-300m 3 per tank, suitable for the solvent turnover needs of chemical enterprises, and weighs only one-third of the same volume carbon steel storage tank, reducing the cost of foundation construction.
2、 Reaction vessels and mixing equipment: adapted to strong corrosion reaction conditions to ensure production continuity
       In the process of chemical reactions, some reactions (such as nitration reaction, sulfonation reaction, acid-base neutralization reaction) will produce strong corrosive media or high temperatures (≤ 120 ℃). Non brick ultra wide non-metallic shells can be used as the main body of reaction vessels and mixing tanks to solve the corrosion and maintenance problems of traditional equipment
1. Strong corrosion reaction kettle (such as pesticide intermediate synthesis reaction kettle)
       Traditional pain points: Metal reaction vessels need to be lined with enamel or ceramic tiles, but enamel can easily explode due to sudden temperature changes (such as reaction heat release), and ceramic tiles can easily fall off under stirring and impact, causing corrosion and leakage of the vessel body. Frequent shutdown maintenance (1-2 times a month) is required, which affects production.
Advantages of non-metallic shell:
       Choose carbon fiber reinforced PP (CF-PP) or FRP material, CF-PP is impact resistant (with a 50% higher impact strength than ordinary PP), and FRP can withstand reaction temperatures of 80-120 ℃ (such as sulfonation reaction temperature of about 90 ℃);
The ultra wide design (diameter 3-5 meters, volume 20-100m 3) can meet the needs of batch reactions, and the integrated molding has no risk of lining detachment. The continuous operation cycle can reach 1-2 years, and the number of maintenance shutdowns is reduced by 90%.
2. Large mixing tanks (such as paint color mixing tanks, wastewater pretreatment mixing tanks)
      Traditional pain points: solvents (such as xylene) in coatings can corrode metal tanks, and chlorine containing disinfectants (such as sodium hypochlorite) in wastewater pretreatment can damage the tile coating; Small volume mixing tanks require multiple units to be connected in parallel, making the operation complex.
Advantages of non-metallic shell:
      Choose PE or FRP materials, PE is solvent resistant and easy to clean, while FRP is resistant to corrosion from chlorine containing wastewater;
The ultra wide design (diameter of 4-6 meters, volume of 50-150m 3) can achieve large-scale mixing in a single tank, suitable for batch color matching in paint factories or centralized wastewater pretreatment in chemical parks. The inner wall is smooth without tile joints, making it less prone to residual materials (reducing cleaning time by 60%).
3、 Waste gas/wastewater treatment equipment: resistant to corrosive pollutants, improving environmental treatment efficiency
      The treatment equipment for waste gas (such as sulfur-containing waste gas and chlorine containing waste gas) and wastewater (such as acid washing wastewater and electroplating wastewater) in the chemical industry, which are exposed to corrosive pollutants for a long time, can be used as the main body of absorption towers and neutralization tanks without tiling and ultra wide non-metallic shells, ensuring the stable operation of environmental protection facilities
1. Exhaust gas absorption tower (such as sulfuric acid plant sulfur-containing exhaust gas absorption tower)
      Traditional pain points: Metal absorption towers (stainless steel, carbon steel) are easily corroded by sulfur-containing waste gases (such as SO ?, H ? S), and ceramic tile coatings are prone to detachment under spray impact (absorption liquid spray pressure of 0.2-0.3MPa), leading to tower leakage and excessive waste gas emissions.
Advantages of non-metallic shell:
      Choose FRP or vinyl ester resin fiberglass reinforced plastic (VE-FRP) material, VE-FRP is acid resistant to gas corrosion (can withstand SO ? concentration ≤ 1000ppm), and resistant to spray impact (surface hardness HB ≥ 40);
      The ultra wide design (diameter 3-8 meters, height 10-20 meters) can increase the exhaust gas treatment capacity (single tower processing capacity 5000-20000m 3/h), adapt to the emission requirements of large chemical plants, and eliminate the risk of leakage caused by tile detachment. The equipment has a lifespan of over 15 years.
2. Wastewater neutralization tank and sedimentation tank (such as pickling wastewater treatment tank in electroplating plant)
      Traditional pain points: Acid resistant ceramic tiles are required to be pasted on the concrete neutralization tank, but the ultra wide tank body (width ≥ 6 meters) is prone to cracking due to temperature changes or foundation settlement, resulting in tile detachment and wastewater leakage (polluting groundwater); The metal pool has poor corrosion resistance and high maintenance costs.
Advantages of non-metallic shell:
      Using PP or FRP materials, it can be integrated into an ultra wide pool body (width 6-10 meters, length 10-20 meters), seamless, anti settlement (the elastic modulus of FRP is suitable for small deformations of the foundation), and resistant to acid washing wastewater (pH=1-2) corrosion;
     The inner wall is smooth without dead corners of ceramic tiles, making it less prone to sludge accumulation (the cleaning cycle of sedimentation tank sludge is extended to 1-2 months, while traditional ceramic tile tanks require weekly cleaning), reducing environmental maintenance costs.
4、 Transport pipelines and fittings: adapted to ultra wide diameter requirements to avoid medium leakage
      In the chemical industry, large-diameter conveying pipelines (such as raw material conveying pipes and wastewater discharge pipes) made of metal materials are prone to corrosion; The use of concrete pipes requires tiling, and the joints are prone to leakage. Non tiling and ultra wide non-metallic pipes can solve this problem:
1. Strong corrosive medium transport pipes (such as chlorine gas transport pipes in chlor alkali plants and acid-base transport pipes in chemical plants)
      Traditional pain points: The adhesive layer of metal pipelines (such as carbon steel lined rubber hoses) is prone to aging and peeling, leading to pipeline corrosion and leakage; Ceramic tile coated pipelines are only suitable for small diameters (≤ 1 meter), and ultra wide diameters (≥ 2 meters) cannot be tiled, and the interface sealing is difficult.
Advantages of non-metallic shell:
     Choose FRP or PTFE lined FRP pipes. FRP can withstand corrosion from chlorine gas and acidic/alkaline media, while PTFE lined pipes can withstand strong oxidizing media such as hypochlorous acid;
     It can produce ultra wide diameter pipelines (with a diameter of 2-4 meters), with a single length of up to 6-12 meters. The interface adopts a "flange seal+O-ring" structure, with no leakage risk, and is suitable for high flow medium transportation in chemical parks (such as transporting 1000-5000m 3 of acid and alkali raw materials per day).
2. Ultra wide caliber fittings (such as tees, elbows, and reducers)
      Traditional pain points: Corrosion of metal fittings and detachment of ceramic tile fittings are more prominent than straight pipes (fittings are subjected to complex stress and prone to stress cracking), and ultra wide diameter fittings (diameter ≥ 3 meters) are difficult to process.
Advantages of non-metallic shell:
      By using FRP hand lay up molding or PP injection molding, ultra wide diameter pipe fittings (diameter 3-5 meters) can be customized, with seamless overall structure and strong stress corrosion resistance (FRP pipe fittings have a stress cracking resistance life 3-5 times higher than metal pipe fittings), suitable for the turning and diversion needs of ultra wide pipeline systems.