A method for manufacturing a rotary ball dust removal device for a desulfurization tower
1、 Background technology:
At present, the environmental protection situation is severe, requiring boiler flue gas data to meet emission standards. After passing through the electric bag filter, the amount of smoke and dust in the boiler flue gas still does not meet the emission standards. Therefore, it is necessary to desulfurize and reduce dust in the desulfurization tower. A regulating bed device is installed in the tower, which integrates deep desulfurization, dust removal, and defogging functions. It has the characteristics of single tower, low energy consumption, strong adaptability, short construction period, no additional site increase, and simple operation. It is suitable for deep purification of SO2 and smoke in coal-fired flue gas. The pollutant emission concentration of wet flue gas desulfurization treated by this technology can reach SO2<35 mg/Nm3 and smoke<5 mg/Nm3.
The existing desulfurization tower rotary ball dust removal device adopts a regulated flow packed bed regulated flow phase change device, which uses a combination structure of multiple layers of annular guide channels and multiple layers of rotary ball baskets. However, during the operation of this rotary ball dust removal device, due to the pushing of flue gas, the rotary balls in the ring channels can be blown out, which affects the desulfurization tower rotary ball dust removal effect. According to the requirements of desulfurization rotary ball dust removal, a grid cover needs to be installed on the matching packing basket to press and restrict the packing balls in each ring channel. However, the current operating rotary ball basket is a cylindrical and hexagonal structure, fully laid in the circular desulfurization tower, and there are leakage holes at the boundary. After filling the gaps with joint filling agent, a grid cover is also needed. The current rotary ball dust removal device is prone to ball running and filling gaps during operation. There are hidden dangers such as adhesive cracking and damage to the combination structure of the spinning ball basket, which require shutdown and maintenance to restore normal processing effects. Due to the occurrence of ball running and malfunctions in the existing spinning ball dust removal device, it is necessary to remove the damaged top grille plate of the spinning ball basket and remove the edge sealant of the spinning ball basket for maintenance, which is time-consuming and labor-intensive; In addition, the layout of the spinning ball basket in the existing spinning ball dust removal device is unreasonable, which can easily block the flue gas channel. Design a set of rotary ball dust removal device based on the operation process to solve the above problems,
Made of a single piece of metal material, the bed surface is a circular shape that is closely attached to the desulfurization tower wall. The upper and lower surfaces are welded with 316L stainless steel bars, and the spacing between the stainless steel bars on the upper and lower passing surfaces is determined according to the size of the rotating ball. Stainless steel plates are used to connect the four sides. The bed surface of the overall rotating ball dust removal device is divided into three parts for spacing. The spinning balls are evenly distributed in three parts, and a door is set on the top bed surface for spinning ball filling and replenishment. The packing ball layout in the rotary ball dust removal device of the desulfurization tower is reasonable, the rotary ball has good fluidity, the smoke and dust treatment effect is faster, and it is not easy to block the flue gas channel. Thus overcoming the maintenance difficulties and easy blockage of smoke in existing technologies, the overall structure is scientific and reasonable, the manufacturing process is simple, the installation and operation are convenient, and the production cost is low.
Original rotary ball dust collector device
After the design and production are completed
2、 Main structure of rotary ball dust removal device for desulfurization tower
Spinning device body, 1st level spinning area, 2nd level spinning area, 3rd level spinning area, spinning ball, stainless steel isolation plate.
1. Rotating ball device body: The top and bottom covers are welded with 8mm 316L stainless steel reinforcement, measuring 4cm x 15cm to 4cm x 25cm. The top cover is a movable door fixed with a locking device, and the outer stainless steel plate is welded. The upper part is equipped with a 52cm stainless steel isolation plate, and the outer protective plate is 40cm high and 3mm thick. It is welded with 316L stainless steel plate.
2. Level 1 spinning ball area: 8cm 316L stainless steel reinforcement is used according to the diameter inside the tower, which is divided into three parts. The part close to the inner circle is the Level 1 spinning ball area.
3. Level 2 spinning ball area: 8cm 316L stainless steel reinforcement is used according to the diameter inside the tower, which is divided into three parts. The second part close to the inner circle is the Level 2 spinning ball area.
4. Level 3 spinning ball area: 8cm 316L stainless steel reinforcement is used according to the diameter inside the tower, which is divided into three parts. The third part close to the inner circle is the Level 3 spinning ball area
5. Spinning ball: The spinning ball is made of polypropylene solid ball processed from isotactic polypropylene. The diameter is 5.5 cm, the structure is regular, and it has excellent mechanical properties. Its strength and hardness are high, and its outstanding performance is its resistance to bending fatigue. The product has good heat resistance. After dust removal and spraying, the flue gas enters through the gaps between the guide systems, and the direction of the airflow changes, forming a circumferential airflow field that drives the spinning ball to revolve around the center and rotate on its own. The inertia capture and interception of absorbing liquid droplets in flue gas by the spinning ball, as well as the condensation of its vapor on the surface of the spinning ball to form a liquid film, create turbulent flow between the packing balls due to the motion of the spinning ball, allowing the gas, liquid, and solid phases to fully contact, greatly reducing the mass transfer resistance of the gas-liquid film and greatly improving the mass transfer rate Reduce the dust content in flue gas. The spinning balls are distributed within the zones of the three-stage spinning ball dust removal device, with an overall ball loading capacity of not less than 96%.
6. Stainless steel partition: The stainless steel partition is 52CM high and 3mm thick. The overall rotary ball dust removal is divided into three parts. The first and second rotary ball areas are equipped with partitions, and the second and third rotary ball areas are equipped with second partitions.
3、 Advantages of the rotating ball dust removal device in the desulfurization tower:
1. Widely applicable
The rotary ball dust removal device of the desulfurization tower has a wide range of applications and can be directly welded according to the desulfurization tower, without being limited by range and size. It has a circular fitting structure and can be installed with small gaps. Suitable for various types of desulfurization and dust removal towers.
2. Reliable operation reduces safety hazards
1) The overall spinning device is welded with 316L stainless steel material, and the upper and lower top covers are made of stainless steel bars measuring 4cm x 15cm -4cm x 25cm to prevent ball running during spinning operation. The rotating ball device is tightly attached to the desulfurization tower wall around it, without the need for sealing, reducing the safety hazards of the rotating ball device operation.
2) Lock and lock the outer side of the protective device to prevent personnel from entering at will; When personnel need to enter the elevator shaft for construction, they should inform the project in advance to collect the key and enter the shaft for construction. After personnel enter, they should lock the inside to prevent external personnel from entering;
3. The rotary ball dust removal device is easy to maintain. During major equipment repairs, the top cover can be replaced with a movable door and a pin structure. The rotary ball cleaning, replacement, and replenishment work can be carried out by disassembling the top cover for quick operation.
4. The overall spinning ball device saves costs
The overall spinning ball device is made of 316L material, which is acid and corrosion resistant, has strong rigidity and good plasticity, and can be used for a long time, saving costs.
4、 Overall spinning ball device section rendering:
