Novel dry desulfurization tower

Abstract

The utility model provides a novel dry desulfurization tower. The novel dry desulfurization tower comprises a bracket, a tower body and a desulfurizing agent feeding system, the bracket is fixed at the lower parts of the tower body and the desulfurizing agent feeding system and is used for supporting the tower body and the desulfurizing agent feeding system; the tower body sequentially comprises an inlet section, a Venturi section and a reaction flue section from bottom to top; the desulfurizing agent feeding system comprises a powder bin, a feeder and a fluidizing air chute; by designing the Venturi section, the reaction efficiency is improved, so that the height of the desulfurizing tower can be reduced, the equipment arrangement difficulty of the desulfurizing tower is greatly reduced, the equipment cost is reduced, the discharge port is arranged, the guide plate is arranged to be the spiral plate, and the inner side edge of the guide plate is arranged downwards; it is guaranteed that desulfurized solid products left in the desulfurizing tower can be discharged in time, it is avoided that the solid products affect contact between flue gas and desulfurizing agent components, and the desulfurizing efficiency of the desulfurizing tower cannot be reduced after long-term use.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas desulfurization, in particular to a novel dry desulfurization tower. Background Technique

[0002] SO2 in flue gas is the main cause of air pollution. Reducing SO2 pollution has become the top priority of current air environment governance.

[0003] In the existing dry desulfurization, flue gas is introduced into a desulfurization device, and the flue gas blows up the dry powder desulfurizer in the device and contacts for desulfurization. However, in order to ensure the desulfurization efficiency and increase the desulfurization reaction time, the height of the existing desulfurization tower is often designed very high, which greatly increases the construction cost of the equipment. At the same time, the increase in height also increases the difficulty of equipment layout. Moreover, the solid products generated by the existing dry desulfurization tower are difficult to unload from the bottom of the desulfurization tower and are often discharged together with the flue gas from the upper outlet and then separated by a cyclone separator. There are many solid products remaining in the desulfurization tower, which affects the contact between the flue gas and the desulfurizer components, resulting in a reduction in the desulfurization efficiency of the desulfurization tower during long-term use. Summary of the Invention

[0004] In view of the above problems, the utility model provides a novel dry desulfurization tower.

[0005] To achieve the above object, the utility model adopts the following technical solutions:

[0006] A novel dry desulfurization tower includes a support, a tower body, and a desulfurizer feeding system;

[0007] The support is fixed at the lower parts of the tower body and the desulfurizer feeding system to support the tower body and the desulfurizer feeding system;

[0008] The tower body successively includes an inlet section, a Venturi section, and a reaction flue section from bottom to top; a flue gas inlet is arranged at the lower part of the inlet section, a flue gas outlet is arranged at the top of the reaction flue section, a guide plate and an air distribution plate are successively arranged in the inlet section from bottom to top; the guide plate is arranged above the flue gas inlet, and a discharge port is arranged at the bottom of the inlet section;

[0009] The desulfurizer feeding system includes a powder bin, a feeder, and a fluidizing air inclined trough; the feeder is arranged below the powder bin, the feeder is docked with the fluidizing air inclined trough, the fluidizing air inclined trough is obliquely arranged, the lower end of the fluidizing air inclined trough is connected to the inlet section, and the lower end of the fluidizing air inclined trough is located above the air distribution plate.

[0010] Further, the Venturi section includes a contraction section, a throat section, and a diffuser section. The lower end of the contraction section is connected to the upper end of the inlet section, the upper end of the contraction section is connected to the lower end of the throat section, the upper end of the throat section is connected to the lower end of the diffuser section, and the upper end of the diffuser section is connected to the reaction flue section.

[0011] Further, the deflector plate is a spiral plate. The outer side edge of the spiral plate is fixed to the inner side wall of the inlet section, the inner side edge of the spiral plate is inclined downward, and a diversion channel is formed between the spiral plate and the inner wall of the inlet section.

[0012] Further, the flue gas inlet is arranged along the tangential direction of the inlet section, the flue gas inlet is arranged below the outer side edge of the deflector plate, and the flue gas enters the diversion channel along the direction of rotation of the spiral plate.

[0013] Further, a side plate is also fixed to the outer side edge of the deflector plate, and the side plate is arranged vertically.

[0014] Further, the air flow distribution plate includes a first distribution plate, a second distribution plate, and a connecting plate. The connecting plate is annular. The first distribution plate is fixed to the inner side of the connecting plate. The second distribution plate is conical, and the bottom of the second distribution plate is connected and fixed to the upper end face of the connecting plate. The outer side of the connecting plate is fixed to the inner side wall of the inlet section. A plurality of ventilation holes are provided on the first distribution plate and the second distribution plate.

[0015] Further, the ventilation holes of the first distribution plate are larger than those of the second distribution plate.

[0016] Further, the diameter of the reaction flue section is larger than that of the inlet section.

[0017] Further, the bottom of the inlet section is conical, and the discharge port is concentrically arranged below the cone.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows: (1) By designing the Venturi section, the reaction efficiency is improved, the height of the desulfurization tower can be reduced, the difficulty of equipment layout of the desulfurization tower is greatly reduced, and the equipment cost is reduced. (2) With the discharge port, the deflector plate is set as a spiral plate, and the inner side edge of the deflector plate is arranged downward. Due to the design of the deflector plate, while guiding the gas flow, the solids generated by desulfurization can also be made to converge towards the inner side edge of the deflector plate after falling behind the deflector plate, and finally fall from the inner side edge of the deflector plate to the bottom of the desulfurization tower, and can finally be discharged through the discharge port by connecting a discharging device. This device facilitates discharging, ensures that the residual desulfurized solid products in the desulfurization tower can be discharged in a timely manner, avoids the influence of the solid products on the contact between the flue gas and the desulfurizing agent components, and prevents the desulfurization efficiency of the desulfurization tower from decreasing during long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural view of a new dry desulfurization tower of the present utility model;

[0020] Figure 2 It is a schematic structural view of the bottom of a new dry desulfurization tower of the present utility model;

[0021] Figure 3 It is a three - dimensional structural view of a deflector of a new dry desulfurization tower of the present utility model;

[0022] Figure 4 It is a schematic structural view of an air distribution plate of a new dry desulfurization tower of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] To further understand the purpose, structure, characteristics and functions of the present utility model, the following is a detailed description in conjunction with embodiments.

[0024] Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 A new dry desulfurization tower according to an embodiment of the present utility model includes a support 100, a tower body 200, and a desulfurizer feeding system 300.

[0025] The support 100 is fixed to the lower parts of the tower body 200 and the desulfurizer feeding system 300 to support the tower body 200 and the desulfurizer feeding system 300.

[0026] The tower body 200 successively includes an inlet section 210, a Venturi section 220, and a reaction flue section 230 from bottom to top; a flue gas inlet 211 is provided at the lower part of the inlet section 210, a flue gas outlet 231 is provided at the top of the reaction flue section 230, a deflector 400 and an air distribution plate 500 are successively provided in the inlet section 210 from bottom to top; the deflector 400 is arranged above the flue gas inlet 211, and a discharge port 212 is provided at the bottom of the inlet section 210; it is ensured that the solid products generated by desulfurization can be discharged from the lower discharge port 212. A discharge valve can also be provided at the discharge port 212 to ensure the airtightness of the system and prevent flue gas from leaking through the discharge port 212 during use..

[0027] The desulfurizer feeding system 300 includes a powder silo 310, a feeder 320, and a fluidizing air chute 330; a platform is provided at the 1 / 3 position of the desulfurization tower. The powder silo 310 is placed on the platform, and a fixing bracket 100 is fixed at the bottom of the platform. The platform is firmly installed to facilitate the stable fixing of the powder silo 310. The powder silo 310 stores the desulfurizer. A feeder 320 is provided below the powder silo 310. The feeder 320 can be a star feeder. The feeder 320 is docked with the fluidizing air chute 330. The fluidizing air chute 330 is inclined. The lower end of the fluidizing air chute 330 is connected to the inlet section 210, and the lower end of the fluidizing air chute 330 is located above the air distribution plate 500. The fluidizing air chute 330 is a pneumatic conveying device, including components such as a fan and a chute. One end of the chute is connected to the desulfurization tower, a fan is provided at the other end, and the upper end of the chute is also docked with the feeder 320 to ensure that during use, the desulfurizer can be fed through the feeder 320 and fall into the chute, and through the operation of the fan, the air is used to make the solid particles be transported downward along the chute in a fluidized state to the inlet section 210.

[0028] The flue gas enters the inlet section 210 from the flue gas inlet 211 at the bottom of the desulfurization tower. After entering, the flue gas is evenly dispersed by the guide plate 400 and the air distribution plate 500, and then encounters the desulfurizer transported by the fluidizing air chute 330 when going upward. The flue gas comes into contact with the desulfurizer, and the desulfurizer is lifted upward by the flue gas. The venturi section 220 increases the flue gas flow rate and generates a strong shear force in the narrow area, enabling the flue gas and the desulfurizer to be fully mixed, facilitating the occurrence of the desulfurization reaction and improving the reaction efficiency. Finally, the flue gas is discharged from the flue gas outlet 231 at the top of the desulfurization tower. By designing the venturi section 220, the present utility model improves the reaction efficiency, thereby reducing the height of the desulfurization tower, greatly reducing the difficulty of equipment layout of the desulfurization tower, and reducing the equipment cost.

[0029] The Venturi section 220 includes a converging section 221, a throat 222, and a diverging section 223. The lower end of the converging section 221 is connected to the upper end of the inlet section 210, the upper end of the converging section 221 is connected to the lower end of the throat 222, the upper end of the throat 222 is connected to the lower end of the diverging section 223, and the upper end of the diverging section 223 is connected to the reaction flue section 230. By designing the Venturi section 220, it is ensured that after the flue gas enters the inlet section 210, it is evenly distributed by the deflector 400 and the air distribution plate 500. At the same time, the desulfurizer conveyed by the fluidized air chute 330 enters the inlet section 210 and is conveyed above the air distribution plate 500. The flue gas contacts the desulfurizer and carries the desulfurizer upward, entering the converging section 221. In the converging section 221, due to the reduction in diameter, the flow velocity of the flue gas will increase significantly, giving the flue gas higher kinetic energy. The high-kinetic-energy fluid can more effectively promote the mixing of the desulfurizer and the flue gas. The velocity of the flue gas fluid increases rapidly, resulting in an increase in the shear force in the narrow area. The shear force can break up the flue gas and the desulfurizer, enabling the desulfurizer to be more evenly distributed in the flue gas flow, avoiding the aggregation of the desulfurizer in the flue gas, thereby increasing the contact area between the two. And the strong shear force can also strip the by-products formed on the surface of the desulfurizer, exposing the surface of the desulfurizer particles, improving the contact efficiency between the desulfurizer and the flue gas, and greatly improving the desulfurization efficiency. At the same time, the converging section 221 and the diverging section 223 will induce turbulence, which enhances the mixing effect and makes the reaction between the desulfurizer and the flue gas more complete. It ensures that the desulfurization tower of the present utility model has high desulfurization efficiency, a lower tower body height, is easy to install and arrange, and reduces the overall cost of the desulfurization tower.

[0030] The deflector 400 is a spiral plate. The outer side 410 of the spiral plate 400 is fixed on the inner wall of the inlet section 210, and the inner side 420 of the spiral plate 400 is inclined downward. A diversion channel is formed between the spiral plate 400 and the inner wall of the inlet section 210. With this deflector design, while the deflector 400 diverts the gas, when the solids generated by desulfurization fall onto the deflector 400, they will converge towards the inner side 420 of the deflector and finally fall from the inner side of the deflector 400 to the bottom of the desulfurization tower. Finally, they can be discharged through the discharge port 212 by connecting a discharging device. This device facilitates discharging, ensuring that the residual desulfurized solid products in the desulfurization tower can be removed in a timely manner, avoiding the influence of the solid products on the contact between the flue gas and the desulfurizer components, and preventing the desulfurization efficiency of the desulfurization tower from decreasing during long-term use.

[0031] The flue gas inlet 211 is arranged along the tangent direction of the inlet section 210, and the flue gas inlet is arranged below the outer side 410 of the deflector 400. The flue gas enters the diversion channel along the direction of rotation of the spiral plate. After the flue gas enters the diversion channel, a part of it rotates and rises along the diversion channel to form a lateral wind, and a part converges towards the inner side of the deflector 400 and flows upward through the inner side of the deflector 400. The incoming air in the two directions converges at the upper end of the deflector 400, ensuring that the flue gas is easily dispersed after being deflected by the deflector 400 and ensuring uniform air flow distribution.

[0032] A side plate 430 is also fixed to the outer side of the deflector 400, and the side plate 430 is arranged vertically. Through this side plate 430, the deflector 400 is fixed to the inner side wall of the tower body. The deflector 400 can be fixed by welding, ensuring that the deflector 400 is firmly fixed with high connection strength and ensuring a long service life of the desulfurization tower.

[0033] The air flow distribution plate 500 includes a first distribution plate 510, a second distribution plate 520 and a connecting plate 530. The connecting plate 530 is annular. The first distribution plate 510 is fixed to the inner side of the connecting plate 530. The second distribution plate 520 is conical. The bottom of the second distribution plate 520 is connected and fixed to the upper end face of the connecting plate 530. The outer side of the connecting plate 530 is fixed to the inner side wall of the inlet section. A plurality of air permeable holes are evenly arranged on the first distribution plate 510 and the second distribution plate 520. By using two distribution plates, it is ensured that the gas can be evenly distributed. Moreover, since the second distribution plate 520 is conical, the distribution area is increased, ensuring that the gas can flow evenly in all directions after passing through the second distribution plate 520, reducing turbulence and non-uniform flow, and ensuring uniform gas distribution. In addition, this conical second distribution plate 520 can reduce the accumulation of desulfurizer on the upper surface of the second distribution plate 520, avoid clogging of the air permeable holes, and ensure that the desulfurizer can be timely blown up by the flue gas to react.

[0034] The air permeable holes of the first distribution plate 510 are larger than those of the second distribution plate 520. It is ensured that after the flue gas is preliminarily evenly distributed through the first distribution plate 510, the flue gas is further carefully distributed through the second distribution plate 520 to ensure the final uniform distribution of the flue gas.

[0035] The diameter of the reaction flue section 230 is larger than that of the inlet section 210. Through the design of the smaller inlet section 210, while reducing the cost, it also ensures a relatively high flow rate of the flue gas in the inlet section 210, which can blow up the desulfurizer and ensure that the flue gas can carry the desulfurizer. At the same time, after passing through the Venturi section 220, the uniformly mixed flue gas and desulfurizer are transported into the reaction flue section 230 for reaction. The flow rate in the reaction flue section 230 decreases, ensuring a relatively low flow rate of the flue gas in the reaction flue section, increasing the contact time between the flue gas and the desulfurizer, ensuring that the flue gas can undergo a sufficient desulfurization reaction, and improving the desulfurization efficiency.

[0036] The bottom of the inlet section 210 is conical, and the discharge port 212 is concentrically arranged below the cone. This facilitates the collection of solid products, convenient discharging, and reduces the solid residue in the desulfurization tower.

[0037] The present utility model has been described by the above related embodiments. However, the above embodiments are only examples for implementing the present utility model. It must be pointed out that the disclosed embodiments do not limit the scope of the present utility model. On the contrary, modifications and refinements made without departing from the spirit and scope of the present utility model fall within the scope of the patent protection of the present utility model.

Claims

1. A new type of dry desulfurization tower, characterized in that: Including bracket, tower body, desulfurizer feeding system; The bracket is fixed to the lower part of the tower body and the desulfurizing agent feeding system to support the tower body and the desulfurizing agent feeding system; The tower body includes an inlet section, a venturi section and a reaction flue section from bottom to top; a flue gas inlet is provided at the lower part of the inlet section, a flue gas outlet is provided at the top of the reaction flue section, and a guide plate and an airflow distribution plate are provided in the inlet section from bottom to top; the guide plate is provided above the flue gas inlet, and a discharge port is provided at the bottom of the inlet section; The desulfurizer feeding system includes a powder bin, a feeder and a fluidizing air chute; the feeder is arranged below the powder bin, the feeder is connected to the fluidizing air chute, the fluidizing air chute is arranged at an angle, the lower end of the fluidizing air chute is connected to the inlet section, and the lower end of the fluidizing air chute is located above the airflow uniform distribution plate.

2. A novel dry desulfurization tower as claimed in claim 1, characterized in that: The venturi section includes a contraction section, a throat and a diffusion section, the lower end of the contraction section is connected to the upper end of the inlet section, the upper end of the contraction section is connected to the lower end of the throat, the upper end of the throat is connected to the lower end of the diffusion section, and the upper end of the diffusion section is connected to the reaction flue section.

3. A novel dry desulfurization tower according to claim 1, characterized in that: The guide plate is a spiral plate, the outer side of the spiral plate is fixed to the inner side wall of the inlet section, the inner side of the spiral plate is tilted downward, and a guide channel is formed between the spiral plate and the inner wall of the inlet section.

4. A novel dry desulfurization tower as claimed in claim 3, characterized in that: The smoke inlet is arranged along the tangent direction of the inlet section, and the smoke inlet is arranged below the outer side of the guide plate, and the smoke enters the guide channel along the rotating direction of the spiral plate.

5. A novel dry desulfurization tower as claimed in claim 3, characterized in that: A side plate is also fixed to the outer side of the guide plate, and the side plate is vertically arranged.

6. A novel dry desulfurization tower according to claim 1, characterized in that: The airflow uniform distribution plate includes a first uniform distribution plate, a second uniform distribution plate and a connecting plate. The connecting plate is annular. The first uniform distribution plate is fixed on the inner side of the connecting plate. The second uniform distribution plate is conical. The bottom of the second uniform distribution plate is connected and fixed to the upper end face of the connecting plate. The outer side of the connecting plate is fixed to the inner side wall of the inlet section. The first uniform distribution plate and the second uniform distribution plate are provided with multiple air holes.

7. A novel dry desulfurization tower as claimed in claim 6, characterized in that: The air holes of the first evenly distributed plate are larger than the air holes of the second evenly distributed plate.

8. A novel dry desulfurization tower according to claim 1, characterized in that: The diameter of the reaction flue section is greater than the diameter of the inlet section.

9. A novel dry desulfurization tower according to claim 1, characterized in that: The bottom of the inlet section is conical, and the discharge port is concentrically arranged below the cone.

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