Semi-Automatic Wet Desulfurization System of Precise Sulfur Content Control for Clean Air

• Customization: Available
• After-sales Service: One Year Guarantee
• Warranty: One Year Guarantee
• Model NO.: Wet desulfurization (sulfur dioxide)
• Customized: Customized
• Condition: New
• Power Source: Hydraulic/Electric/Gas
• Automatic Grade: Fully Automatic/Semi-Automatic
• Type: Wet Desulfurization
• Certification: ISO, CE
• Production Capacity 1: 200000m³/H; Wet Desulfurization
• Production Capacity 2: Automatic Induced Draft Fan
• Production Capacity 3: Automatic Circulation Pump
• Production Capacity 4: Automatic Detection of Sulfur Dioxide
• Production Capacity 5: Adding Drugs According to The Sulfur Content
• Production Capacity 6: Automatic Adjustment of The Dosage
• Production Capacity 7: Operation and Inspection Are Required
• Transport Package: Frame Packaging, Wooden Case Packaging, etc.
• Specification: Customized
• Trademark: PRIME
• Origin: China
• HS Code: 8417100000
• Production Capacity: 20sets/Year
• Package Size: 1500.00cm * 2000.00cm * 2000.00cm
• Package Gross Weight: 50000000.000kg

Product Description

Product Description

 

Shandong Huaxing Group Wangcun Alumina Flue Gas Desulfurization Case Study

1. Sodium-Calcium Dual-Alkali Desulfurization Process
The Sodium-Calcium Dual-Alkali Desulfurization Process (Na₂CO₃/Ca(OH)₂) is a technology developed based on the combination of limestone/gypsum method and sodium alkali method. It overcomes the disadvantages of scaling in the limestone/gypsum method and high operating costs in the sodium alkali method. By utilizing the high solubility of sodium salts in water, the process employs sodium alkali to absorb SO₂ within the absorption tower. The desulfurization solution, after absorption, is regenerated in a regeneration tank using inexpensive lime, allowing for the recycling and utilization of sodium ions.

This process combines the characteristics of the lime method and the sodium alkali method, addressing the issue of scaling within the lime method towers while not possessing the high absorption efficiency of the sodium alkali method.

2. Process Characteristics
Compared to limestone or lime wet desulfurization processes, the dual-alkali process has the following advantages in principle:
The use of sodium alkali for desulfurization results in circulating water that is primarily a sodium ion (Na+) solution. This reduces the risk of corrosion and blockage in water pumps, pipelines and equipment, making it easier to operate and maintain the equipment.

The regeneration of the absorbent and precipitation of desulfurization residues occur outside the tower, thereby avoiding blockage and abrasion within the tower. This improves operational reliability and reduces operating costs.

The sodium-based absorbent has a fast absorption rate for SO₂, allowing for a higher desulfurization efficiency with a relatively small liquid-to-gas ratio, typically exceeding 90%.

In terms of integrated desulfurization and dust removal technology, it can also enhance the utilization of lime.

3. Process Flow Introduction
The desulfurization system consists of the SO₂ absorption system, flue gas system, desulfurizer feeding system, byproduct treatment system, process water system, and electrical control system.

Flue Gas Desulfurization Process for Furnace Emission

Furnace Flue Gas → Desulfurization Absorption Tower → Chimney

After removing most of the particulate matter through the dust collector, the flue gas from the furnace is drawn out by the induced draft fan and blown into the high-efficiency atomizing spray desulfurization tower under positive pressure (the flue gas inlet is located in the lower part of the desulfurization tower). A pre-cooling and pre-desulfurization system is installed at the inlet of the desulfurization tower. The flue gas, after being cooled, humidified, and partially desulfurized, enters the desulfurization tower. Inside the tower, the flue gas flows upward and comes into contact with the spray slurry in a countercurrent manner, thoroughly mixing the two. The tower is equipped with four layers of high-velocity swirl plates and four layers of spray systems. In this section, the space is filled with atomized liquid droplets with particle sizes of 100-300 μm. The SO₂ in the flue gas reacts with the absorbing alkaline solution again, removing more than 90% of sulfur dioxide. The rational selection and scientific arrangement of the spray system create a misting zone with no dead zones and minimal overlap, ensuring the uniform distribution of misty liquid droplets. The flue gas travels through the misting zone for an extended period, providing ample opportunities for SO₂ in the flue gas to come into contact with the desulfurization solution and continuously collide with the mist droplets. The SO₂ reacts with the absorbing solution, thus being removed, while the remaining smoke particles are carried along with the "water droplets," increasing their mass. The desulfurized liquid falls into the bottom of the desulfurization tower and is periodically discharged into the collection system installed after the desulfurization tower. After replenishing a certain amount of alkaline solution, it is pumped back into the atomization and liquid supply system for reuse. The desulfurizing agent remains in a circulating state throughout the process.

4. Principle of the Process
The sodium-calcium double alkali process [Na2CO3/Ca(OH)2] utilizes pure alkali initiation and employs the sodium-calcium method for SO2 absorption and lime regeneration. Its basic chemical principles consist of the desulfurization process and the regeneration process:

Desulphurisation Process
Na₂CO₃ + SO₂ → Na₂SO₃ + CO₂ 
(1) The equation represents the absorption initiation reaction.
2NaOH + SO₂ → Na₂SO₃ + H2O
(2) The equation represents the main reaction, occurring at pH > 9 (higher alkalinity).
Na₂CO₃ + SO₂ + H₂O → NaHSO₃   
(3) The equation represents the reaction that takes place when the alkalinity decreases to neutral or even acidic conditions (5 < pH < 9).

Regeneration Process
2NaHSO₃ + Ca(OH)₂  → Na₂SO₃ +  +CaSO₃↓ + 2H₂O
Na₂SO₃ + Ca(OH)₂  → 2NaOH +  CaSO₃↓   

In the lime slurry (lime reaches saturation), the neutral (amphoteric) NaHSO₃ quickly reacts with lime, releasing [Na+]. Subsequently, the generated [SO₃^2-] continues to react with lime, and the resulting calcium bisulfite slowly precipitates as a semi-hydrate compound, thereby regenerating [Na+]. The absorbent solution recovers its ability to absorb SO₂ and can be recycled.

The byproducts of desulfurization are calcium sulfite or calcium sulfate (after oxidation). Users can choose different methods to treat the byproducts according to their needs.

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Company Profile

 

Company Profile

Vision
With decades of rapid development and accumulation, China has been perfect and mature on technology and management in various industrial areas, shaping a complete processing manufacturing industry with competitive price, well known for its excellent skill, high efficiency and hardworking team with qualification for personnel dispatching.
At the time of economic globalization, it is our consistent target and objective to integrate and export all kinds of technology, management mode, engineering project and manpower as per the actual requirement of our client With our own abundant technical strength, superior integration capability of technology and resources, well experienced of project implementation and management as basis and platform;
Let China go out to the world, and make the world know of China;
 

Professional
Professional technical and management team with abundant experience in the implementation of domestic and international projects;

Responsive
Responsive care translating your needs into complete solutions

Integration
Integrating various technologies and resources in China and fulfilling complementary advantages by relying on professional teams

Motivation
Motivated to provide optimal solution and quality products

Exceptional
Exceptional project delivery and execution meeting your expectations

Our Team
Professional technical team
Prime is staffed with professional import & export team skilled with the practice of import and export business, including sea freight packing, logistics organization, L/C review, cargo booking, and customs clearance, L/C negotiation, double authentication of shipment documents, etc.
All above personnel are well experienced in the execution of projects in Southeast Asia and Middle East. 

Complete procurement mechanism
Our professional team of procurement offers strict management of supplier 's qualification inspection and selection, complete system of supplier listing, rating and elimination, to ensure the supplier is qualified and capable of implementing the project and supplied with product of high quality, and maintain a healthy and good condition of credibility, contract settlement and capital flow management.

Quality management system
Our complete quality management system , the process control covering from Scheme formulation , engineering technology, detailed design, to processing and manufacturing of equipment and material , ex-factory test and site erection and commissioning till it put into production, which through multi-level inspection, tour inspection, supervision and node control can ensure quality of the final product.

Well experienced
Executive team is abundant in experience of overseas project implementation with similar project working experiences, esp. experience in Southeast Asia, Middle East projects;
 

ISO System Certification

 

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