Key Features of Glass Fiber Desulfurization Tower:
1. The glass fiber reinforced plastic desulfurization tower is a new type of fiber reinforced plastic composite material, made by wrapping synthetic resin and glass fibers. Due to its resistance to chemical corrosion and lower cost compared to nickel alloys, our company has achieved excellent results in applying glass fiber reinforced plastic in many wet flue gas desulfurization systems. The entire process from flue gas intake to emission has successfully been implemented using FRP materials.
2. Glass fiber reinforced plastic (FRP) sulfur towers and internal components feature excellent physical and mechanical properties, with a density of 1.8-2.1 g/cm³, tensile strength of 160-320 MPa, axial bending strength of 140 MPa, layerwise shear strength of 50 MPa, tensile modulus of 25 GPa, shear modulus of 7 GPa, bending modulus of 9.3 GPa, Barcol hardness of 40, Poisson's ratio of 0.3, fracture elongation of 0.8-1.2%, and thermal expansion coefficient of 11.2*10^-6 /℃。
3. The FRP pipes and accessories in the spray system of the absorption tower have at least a 2.5mm thick wear-resistant lining. Standard glass pipes, when lined with a resin-rich lining, can withstand the wear from slurry containing particles less than 150μm and a flow rate below 2m/s. The wear-resistant performance of FRP can be enhanced by adding wear-resistant fillers (such as SiO2, SiC, ceramic powder). The bend radius of the FRP should be at least three times the diameter or the internal surface should have a bend radius of at least 25mm.
4. The FRP column tower boasts resistance to chemical corrosion and alternating wet and dry conditions, thus its service life can reach up to 20 years.
Brick factory desulfurization towers, brick factory flue gas desulfurization towers, brick factory flue gas desulfurization and dust removal equipment, double firing tunnel kiln brick factory flue gas desulfurization towers, tunnel kiln desulfurization and dust removal equipment, corrosion-resistant brick factory desulfurization towers, double firing tunnel kiln flue gas desulfurization project, brick kiln desulfurization towers, coal gangue flue gas dust removal and desulfurization towers.
Equipment Resistance: ＜1100Pa
Inlet Temperature: 280℃
Desulfurization efficiency up to 96% and above
Service Life ≥ 15 Years
Desulfurization tower process principle:
Brick factory-specific wet flue gas desulfurization and dust removal equipment utilizes a wet desulfurization and dust removal technology developed based on the strong mass transfer mechanism of multiphase turbulent flow. It combines centrifugal water film dust removal with spray沸腾 desulfurization and dust removal into one unit. The flue gas containing dust and harmful gases is accelerated by a specially designed swirl plate separator and sprayed into the atomized liquid, which collides with the desulfurization neutralizing liquid sprayed from the top of the tower, forming a swirling force. The gas and liquid are rapidly swirling and thoroughly mixed before rising into the boiling reaction layer. The dust and harmful gases in the flue gas are captured and absorbed by the fine liquid particles in the desulfurization liquid. Due to the large number of interfaces generated by the atomized liquid particles, the efficiency of capturing and absorbing dust and harmful gases per unit volume of liquid is high. The flue gas after reaching the standard purification is discharged into the atmosphere through a dewatering unit, induced draft fan, and chimney. Technical specifications: Desulfurization efficiency (%) ≥98, Dust removal efficiency (%) ≥98, Lingman blackness (grade) ≤1, Liquid-gas ratio (L/m3) 0.8～1.5, System resistance (Pa) <800. Technical features: Integrated desulfurization and dust removal, compact structure, small equipment footprint, low investment cost; Desulfurizing agents can be pure soda-lime, slag water-magnesium oxide, slag water-lime, or other alkaline wastewater; The system is easy to operate, stable in operation, and convenient to maintain; Corrosion-resistant and adaptable, suitable for all types of vertical and horizontal chain grate boilers, kilns, brick factory tunnel kiln flue gas desulfurization and dust removal, brick factory coal gangue flue gas dust removal and desulfurization, and also suitable for high dust concentration flue gases from silicon iron furnaces, silicon calcium furnaces, sawdust fuel boilers, straw fuel boilers, wood fuel boilers, heavy oil fuel boilers, and waste plastic fuel boilers, etc., which are difficult to treat. Application range: Wet flue gas desulfurization and dust removal equipment is suitable for coal-fired boilers in various industries.
Glass fiber desulfurization and dust removal equipment operates by controlling sulfur dioxide emissions. The dust remover not only removes sulfur dioxide from flue gas but also produces high-value ammonium sulfate fertilizer products. This boiler dust removal equipment uses a certain concentration of ammonia water (for example, 28%) as a desulfurizing agent. The resulting ammonium sulfate slurry is transported to the fertilizer plant's treatment system. The amount of ammonia water required for the desulfurization process is automatically regulated by a preset pH control valve and measured by a flowmeter. The ammonium sulfate crystals are crystallized from the saturated ammonium sulfate slurry in the desulfurization and dust removal equipment, forming suspended particles with a weight ratio of about 35%. These slurry is then pumped to the treatment site, where it undergoes primary and secondary dewatering. Afterward, it is further dehydrated, dried, condensed, and stored at the fertilizer plant. While the boiler dust removal equipment desulfurizes flue gas, it also generates considerable by-products, achieving economic benefits.
Desulfurization and dust removal equipment features:
1. Wash-down working principle, high dust and desulfurization efficiency, captures more harmful gases. The flue gas purifier integrates desulfurization and dust removal, using a spray method with uniquely designed nozzles. These nozzles are made of glass fiber reinforced plastic using American technology, and under certain water pressure, they spray out a dense mist. The dust, harmful gases, and water mist have ample contact, resulting in significantly improved dust, desulfurization, denitrification, and carbon black washing effects compared to other wet scrubbers. Dust removal rate ≥ 98%, sulfur dioxide removal rate ≥ 98%, flue gas Lingman blackness < level 1.
2. The dehydrator design is reasonable and unique, offering excellent dehydration performance. The drum is equipped with a dehydration unit. The dehydrator plates are designed with both reasonableness and uniqueness, allowing mist to be collided, intercepted, and redirected as it passes through the dehydration unit, flowing down along the drum wall. This prevents secondary water carryover, resulting in high dehydration efficiency.
3. Low resistance, water and energy saving, with low operation costs. Flue gas is naturally introduced from the bottom of the cylinder, with a large cross-section and low wind speed, resulting in minimal resistance. The main resistance is ≤600Pa, and the system resistance is ≤1200Pa. Due to the low resistance, less power is consumed. Additionally, the water discharged is settled and recirculated, saving water resources and preventing wastewater from entering the sewage system, thus avoiding secondary pollution. This achieves water and energy savings, reducing operation costs.
4. Compact in size, lightweight, and minimal space requirement; easy to install and transport. This product features a cylindrical shape, is a solid structure, comes with a built-in stand upon factory shipment, and is highly convenient for installation and relocation. It can be mounted in various ways, such as left-right hanging or overhead laying, depending on the ground conditions and space availability, offering strong adaptability.
5. Operation is relatively simple and convenient, with minimal maintenance needs. It's easy to operate, manage, and maintain, boasting high operational rates and versatility in various working environments.
6. Strong adaptability to fluctuations in SO2 concentration in flue gas; different desulfurization processes can accommodate varying sulfur content in coal. Desulfurizing agents, such as lime, alkali, and magnesium oxide, can be chosen in various forms to achieve effective desulfurization.
Desulfurization and dust removal equipment operation procedure
1. Check that the valves and circulating pumps are operating normally before the equipment is run.
2. Start the recirculation pump only when water begins to flow into the sedimentation pond from the overflow tank, then initiate the induced draft fan.
3. Adjust the equipment water supply in a timely manner based on the boiler's operational conditions.
4. After equipment startup, a dedicated person monitors the sedimentation pond water level and continuously observes the pH value, with the circulating pH ranging between 8-10.
5. While the boiler is shut down, a comprehensive inspection and maintenance of the deduster should be conducted. Check for any blockages in the water supply lines, and open the ash discharge valve to thoroughly remove accumulated dust.
6. The circulating water pumps series discharge a portion of the recycled water weekly and replenish industrial water.
7. Sludge is cleared promptly, ensuring clear effluent water quality.
Desulfurization and Dust Removal Equipment User Instructions
1. Dust collectors should generally not be supplied as finished products. Please refer to relevant data and materials for designing equipment and accessories that meet user satisfaction.
1) Boiler brand, exhaust gas volume, exhaust gas temperature, coal sulfur content, and ash.
2) Boiler tail smoke channel outlet size and elevation.
3) Blower model, room layout dimensions.
4) Local air emissions standards level and design requirements for dust removal and ash removal.
5) Industrial water pressure and water source conditions.
6) Feedback on the operational and maintenance platform.
2. Installation Precautions:
1) The installation base needs to be leveled to ensure the dust collector remains in a horizontal state.
2) The footer is securely intermittent welded to the foundation's embedded iron.
3) After the overall installation is completed, before commissioning, the intake door must be opened to check for any loosening or detachment of internal components and wear-resistant layers, as well as for any debris, which should be removed immediately.
4) The deduster should be operated for at least 24 hours.
5) Prior to operation, start the fan and inspect the tightness of the casing flanges and all openings. Any air leaks should be promptly eliminated.
Magnesium Oxide Method
Magnesium oxide desulfurization involves first mixing magnesium oxide powder with hot water to form an Mg(OH)2 slurry, which is then added to the absorber tower. It is circulated and washed with the absorption slurry, which is pumped into the tower's spray network to wash flue gas from the boiler. The SO2 in the boiler flue gas reacts with MgO to form MgSO3, which is then oxidized to become MgSO4 solution.
Specific reactions are as follows:
Slurry Preparation: MgO + H2O = 2Mg(OH)2
Absorption Reaction: Mg(OH)2 + SO2 → MgSO3 + H2O
MgSO3 + SO2 + H2O→Mg(HSO3)2
Mg(HSO3)2 + Mg(OH)2→2MgSO3 + 2H2O
Oxidation Reaction: MgSO3 + 1/2O2 → MgSO4
By-product Recovery: MgSO4 + 7 H2O = MgSO4·7H2O
Characteristics of Magnesium Oxide Method:
1. MgO is porous, highly reactive, and has a high reaction degree. MgO has a higher reactivity than CaO, and Mg(OH)2 is more alkaline than Ca(OH)2. During desulfurization, MgO particles react with SO2 to form MgSO3 and MgSO4, which dissolve in water without affecting further reactions.
2. Utilizing magnesium-based desulfurization saves on investment compared to calcium-based desulfurization. This is due to the fact that the weight of MgO is 71% of CaO and 40% of CaCO3. Less MgO is required to remove the same amount of SO2, and the transportation, storage, and maturation systems, as well as the desulfurizing agent supply system, are also simplified compared to calcium-based methods.
3. The desulfurization by-products have high solubility. The desulfurization by-products, MgSO3 and MgSO4, exhibit high solubility, with their solid suspended particles being loose fine powder, which is not prone to settling. Moreover, the desulfurization process occurs in a liquid state, eliminating issues such as scaling, caking, wear, and blockages.
4. No secondary pollution. The by-product slurry from magnesium-based desulfurization is primarily a solution of MgSO4 after aeration, which can be directly discharged into the sewage pipeline or directly into the ash field via the original ash washing pipeline of the power plant, without causing secondary pollution.
Our company provides on-site installation and debugging services by engineers for our desulfurization equipment upon shipment to ensure normal operation of the equipment.
2. Within the first year of normal equipment use, any issues related to equipment quality will be addressed free of charge by our company. We will provide a response within 12 hours, and in emergencies, we will send technical personnel for on-site guidance.
3. We can provide technical training for your operators based on the actual situation, enabling them to quickly master the technical skills for proper operation and maintenance of the equipment.
The dual alkali method for flue gas desulfurization overcomes the drawback of scaling in the limestone-lime process. Traditional limestone/lime-gypsum flue gas desulfurization processes use calcium-based desulfurizing agents to absorb sulfur dioxide, forming calcium sulfate and calcium sulfite, which have low solubility and tend to scale up and block within the desulfurization tower and pipelines. Scaling and blocking issues severely affect the normal operation of the desulfurization system, and worse, they can severely impact the boiler system's operation. To minimize the adverse effects of calcium-based desulfurizing agents, most calcium-based desulfurization processes require corresponding forced oxidation systems (aeration systems), thereby increasing initial investment and operating costs. The use of inexpensive desulfurizing agents can easily lead to scaling and blocking problems, while the operation with sodium-based desulfurizing agents is too costly and the desulfurization products are difficult to handle, creating a contradiction. The dual alkali flue gas desulfurization process was thus developed to address these issues effectively.
Compared to the limestone or lime wet flue gas desulfurization process, the dual alkali method offers the following advantages: 1. Using NaOH for desulfurization, the circulating water is essentially a solution of NaOH, which minimizes corrosion and clogging of pumps, pipes, and equipment during the circulation process, facilitating equipment operation and maintenance.
2. The regeneration of absorbents and sedimentation of desulfurization sludge occur outside the tower, thus avoiding blockage and wear inside the tower, improving operational reliability, and reducing operational costs; at the same time, an efficient tray tower or packed tower can replace the empty tower, making the system more compact and increasing desulfurization efficiency.
3. Sodium-based absorbent liquids have a fast absorption rate for SO2, allowing for a smaller liquid-gas ratio to achieve a higher desulfurization efficiency, typically above 90%.
4. For the desulfurization and dust removal integrated technology, it can improve the utilization rate of lime.
Drawbacks include: The byproduct Na2SO4 from the oxidation of NaSO3 is difficult to regenerate, necessitating continuous addition of NaOH or Na2CO3, which increases the consumption of alkali. Additionally, the presence of Na2SO4 will also reduce the quality of plaster.
The dual alkali desulfurization technology is a mature technique used both domestically and internationally. It is particularly suitable for desulfurization of flue gas in small and medium-sized boilers and boasts a broad market prospect.
Ammonia-Sulfur Ammonium Process Desulfurization Technology Features
The wet ammonia desulfurization process is a mature and industrialized desulfurization technique, utilizing ammonia absorbent to wash flue gas containing sulfur dioxide. The byproduct, ammonium sulfate, can be used as an agricultural fertilizer. It is well-suited to meet the needs of China's flue gas desulfurization development. The wet ammonia desulfurization process offers the following advantages:
1. Wide application range; not restricted by sulfur content or boiler capacity. The higher the sulfur content, the greater the yield of ammonium sulfate.
2. The desulfurization efficiency is very high, easily achieving over 95%. The flue gas after desulfurization not only has a very low sulfur dioxide concentration, but also sees a significant reduction in dust content.
3. Absorbents are easily procurable and come in three forms: liquid ammonia, ammonia water, and ammonium carbonate.
4. The ammonia desulfurization unit has strong adaptability to changes in unit load, capable of accommodating rapid start-up, cold start-up, warm start-up, and hot start-up methods; operates effectively under unit load conditions ranging from 35% to 140% of the Basic Maximum Continuous Rating (BMCR).
5. There are successful implementations both domestically and internationally, with excellent operational reliability and no occurrence of scaling issues.
6. Ammonia is an excellent alkaline absorbent with a high absorption rate.
7. Byproduct ammonium sulfate has high value and good economic benefits; glass fiber denitrification, dedusting, and desulfurization integrated system
Integrated denitrification, dust removal, and desulfurization design process: Flue gas → Pressure boosting fan → Waste heat recovery unit (boiler economizer) → Heat exchanger → Denitrification, desulfurization, and dust removal integrated tower → Heat exchanger → High-altitude emission.
Selection Guide for Denitrification, Dust Removal, and Desulfurization Systems
The system must be designed based on the boiler model, coal consumption, flue gas composition, flow rate, temperature, medium concentration, and other indicators provided by the user, as well as their specific requirements. We can undertake the full or partial project. Our company has specialized calculation software to ensure accurate and reasonable selection.
Application Fields
This system is widely used in the power, steel, fertilizer, cement industries, and environmental improvement for other industrial enterprises dealing with flue gas pollution. Our business scope includes flue gas denitrification and desulfurization, dust removal, sulfur dioxide gas reuse, deep energy-saving transformation of boilers, and wastewater treatment.
