Boiler desulfurization conveying device based on multi-point distribution and multi-stage diameter change synergistic optimization

Abstract

This utility model relates to the field of boiler desulfurization conveying technology, specifically disclosing a boiler desulfurization conveying device based on multi-point distribution and multi-stage diameter variation synergistic optimization. The device includes a first main conveying pipe, one end of which is connected to a transmitter in a limestone compartment. This boiler desulfurization conveying device, based on multi-point distribution and multi-stage diameter variation synergistic optimization, constructs a multi-stage gradually narrowing conveying channel through conical diameter variations in the first, second, and third main conveying pipes. When limestone powder enters the conical section of the first main conveying pipe, the gradual contraction of the pipe cross-section accelerates the gas-solid two-phase flow, forming a stable jet that enters the second main conveying pipe. The flow velocity is further optimized through the conical transition section of the second main conveying pipe, and finally, the conical structure of the third main conveying pipe completes the three-stage acceleration process. This avoids limestone powder accumulation caused by a single pipe diameter and reduces pipe wear.

Description

Technical Field

[0001] This utility model relates to the field of boiler desulfurization and conveying technology, specifically a boiler desulfurization and conveying device based on multi-point distribution and multi-stage variable diameter collaborative optimization. Background Technology

[0002] In energy production and power generation, circulating fluidized bed boilers are widely used in self-owned power plants and other places due to their advantages such as high-efficiency combustion and low pollution emissions. However, the in-furnace desulfurization system of existing circulating fluidized bed boilers has many problems that need to be solved in actual operation. In the limestone transportation process, the distribution and layout of limestone transportation pipelines are defective. The original pipeline distribution method results in large differences in resistance at each outlet, which makes it easy for pipe blockage to occur during transportation. This not only affects the continuous operation of the system, but also requires frequent shutdowns for maintenance, increasing operating costs and raising equipment maintenance costs. Utility Model Content

[0003] The purpose of this invention is to provide a boiler desulfurization conveying device based on multi-point distribution and multi-stage variable diameter collaborative optimization, so as to solve the problem mentioned in the background art that limestone is prone to blockage during transportation and requires frequent cleaning.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a boiler desulfurization conveying device based on multi-point distribution and multi-stage variable diameter collaborative optimization, comprising a first main conveying pipeline, one end of which is connected to a transmitter of a limestone compartment, a support frame placed on the ground on one side of the first main conveying pipeline, and a vertical distributor fixedly installed on the outer surface of the support frame, a second main conveying pipeline fixedly installed on the outer surface of one end of the first main conveying pipeline, and a third main conveying pipeline fixedly installed on the outer surface of the end of the second main conveying pipeline away from the first main conveying pipeline, the outer surface of the end of the first main conveying pipeline near the second main conveying pipeline being a gradually tapering conical pipe, the outer surface of the end of the second main conveying pipeline near the third main conveying pipeline being a gradually tapering conical pipe, and the outer surface of the end of the third main conveying pipeline away from the second main conveying pipeline being a gradually tapering conical pipe.

[0005] Preferably, the outer surfaces of the first main conveying pipe, the second main conveying pipe and the third main conveying pipe are respectively fixedly installed with fixed support frames, and the outer surfaces of the fixed support frames are fixed to the ground.

[0006] By adopting the above technical solution, the height between the first main conveying pipe, the second main conveying pipe, and the third main conveying pipe can be adjusted by a fixed support frame, so that the first main conveying pipe, the second main conveying pipe, and the third main conveying pipe can be aligned with each other. This prevents the connection between the first main conveying pipe, the second main conveying pipe, and the third main conveying pipe from deforming and leaking due to uneven concentricity. It also supports the first main conveying pipe, the second main conveying pipe, and the third main conveying pipe, allowing pipes of different diameters to be raised and fixed.

[0007] Preferably, a bend connector is fixedly installed on the outer surface of one end of the third main conveying pipe, and a feed pipe is fixedly installed on the outer surface of the vertical distributor. The feed pipe is connected to one end of the bend connector. The bend connector has an arc-shaped design, and a fixed support frame is fixedly installed on the outer surface of the bend connector.

[0008] By adopting the above technical solution, the arc design of the bent pipe connector allows the limestone powder to be fed into the bent pipe connector through the third main conveying pipe. During the turning process, the limestone powder can achieve resistance optimization, ensuring that the material is smoothly introduced into the vertical distributor in a low-turbulence state through the feed pipe. This allows the limestone powder to be smoothly fed into the vertical distributor through the feed pipe, thereby avoiding powder deposition and conveying efficiency reduction caused by abrupt changes in the flow channel, and providing stable material input conditions for the uniform feeding of the subsequent vertical distributor.

[0009] Preferably, the end of the vertical distributor near the bend connector is tapered, and the end of the vertical distributor away from the fixed support frame is also tapered.

[0010] By adopting the above technical solution, the conical design on both sides of the vertical distributor allows the limestone powder to enter the interior of the vertical distributor, and the air and limestone powder can be easily discharged outward along the conical inclined surface of the vertical distributor, providing stable material output conditions for the uniform discharge of the vertical distributor.

[0011] Preferably, the outer surface of the vertical distributor is fixedly provided with four discharge pipes, and the outer surface of each discharge pipe is fixedly installed with a branch pipe, which is connected to the boiler.

[0012] By adopting the above technical solution, the limestone powder discharged through the four discharge pipes on the outer surface of the vertical distributor can be discharged into the branch pipes through the four discharge pipes. This allows the discharged limestone powder to be discharged into the boiler furnace at multiple points, thereby balancing the flow and resistance in the four discharge pipes and dynamically balancing the distribution of materials in the furnace. This reduces the failure rate of pipe blockage and wear, reduces the excessive input of limestone powder to reduce resource waste, and improves the efficiency and economy of desulfurization through limestone dispersion optimization.

[0013] Preferably, the vertical distributor has an inspection port on the outer surface of one end near the branch pipe, and the inspection port is concentric with the vertical distributor. A top cover is inserted and installed on the outer surface of the inspection port, and a handle is fixedly installed on the outer surface of the top cover. The top cover and the inspection port are connected and fixed with screws.

[0014] With the above technical solution, when limestone clumps cause blockage inside the vertical distributor, the top cover can be easily lifted by the handle and removed from the inspection port, making it convenient to clean the inside of the vertical distributor through the inspection port. This facilitates cleaning the inside of the vertical distributor when blockage occurs, making maintenance easier and ensuring the smooth flow of the conveying pipeline.

[0015] Preferably, one end of the top cover is chamfered, and a sealing ring is fitted onto the outer surface of the top cover, with the outer surface of the sealing ring fitting against the outer surface of the inspection port. The outer surface of the inspection port and the top cover are concentrically designed.

[0016] By adopting the above technical solution, the chamfered design of the top cover can facilitate the guidance and insertion of the top cover into the inspection port, and the sealing performance between the top cover and the inspection port can be improved by the sealing ring.

[0017] Compared with the prior art, the beneficial effects of this utility model are: the boiler desulfurization conveying device based on multi-point distribution and multi-stage variable diameter synergistic optimization:

[0018] 1. By designing tapered diameter variations in the first, second, and third main conveying pipes, a multi-stage gradually narrowing conveying channel is constructed. When limestone powder enters the tapered section of the first main conveying pipe, the gradual contraction of the pipe cross-section accelerates the gas-solid two-phase flow, forming a stable jet that enters the second main conveying pipe. The flow velocity is further optimized through the tapered transition section of the second main conveying pipe, and finally, the tapered structure of the third main conveying pipe completes the three-stage acceleration. This avoids sudden changes in local flow velocity caused by a single pipe diameter, ensuring that the powder flow velocity is always maintained within the optimal conveying range. This prevents sedimentation and pipe blockage caused by excessively low flow velocity, and avoids pipe scouring and wear caused by excessively high flow velocity, achieving synergistic optimization of conveying efficiency and equipment life.

[0019] 2. By setting up a fixed support frame, the first main conveying pipe, the second main conveying pipe, the third main conveying pipe and the bend connector can maintain concentricity, so that the pipes can be stably connected and placed. The arc design of the bend connector allows limestone powder to smoothly enter the vertical distributor, and the first main conveying pipe, the second main conveying pipe, the third main conveying pipe and the bend connector can be connected together to reduce the chance of leakage at the connection.

[0020] 3. The conical design of the vertical distributor allows air and limestone powder to be discharged more easily and smoothly into the branch pipes through the discharge pipe. This enables the limestone powder to be fed into the boiler furnace from multiple points through the four branch pipes, greatly improving the uniformity of the vertical distributor's discharge and ensuring that the limestone powder enters the boiler furnace evenly. This enhances the efficiency and quality of desulfurization, reduces limestone waste, and improves economic efficiency.

[0021] 4. When limestone clumps appear inside the vertical distributor, it will affect the flow and transportation of limestone powder. At this time, the screws can be removed and the handle can be held to remove the top cover from the inspection port, making it convenient to remove the clumps of limestone inside the vertical distributor for cleaning, facilitating maintenance while ensuring the smooth flow of the conveying pipeline. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the first main conveying pipeline and the support frame of this utility model;

[0023] Figure 2 This is a three-dimensional structural diagram of the fixed support frame and the second main conveying pipeline of this utility model;

[0024] Figure 3 This is a cross-sectional perspective view of the second and third main conveying pipelines of this utility model.

[0025] Figure 4 This is a three-dimensional structural diagram of the support frame and vertical distributor of this utility model;

[0026] Figure 5 This is an exploded three-dimensional structural diagram of the vertical distributor and top cover of this utility model;

[0027] Figure 6 This is a cross-sectional three-dimensional structural diagram of the vertical distributor and inspection port of this utility model.

[0028] In the diagram: 1. First main conveying pipe; 2. Fixed support frame; 3. Second main conveying pipe; 4. Third main conveying pipe; 5. Bend connector; 6. Placement support frame; 7. Vertical distributor; 8. Feed pipe; 9. Top cover; 10. Handle; 11. Sealing ring; 12. Inspection port; 13. Discharge pipe; 14. Branch pipe. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figure 1-6 This utility model provides a technical solution: a boiler desulfurization conveying device based on multi-point distribution and multi-stage variable diameter collaborative optimization, including a first main conveying pipe 1. One end of the first main conveying pipe 1 is connected to the transmitter of the limestone compartment. A support frame 6 is placed on the ground on one side of the first main conveying pipe 1, and a vertical distributor 7 is fixedly installed on the outer surface of the support frame 6. A second main conveying pipe 3 is fixedly installed on the outer surface of one end of the first main conveying pipe 1, and a third main conveying pipe 4 is fixedly installed on the outer surface of the end of the second main conveying pipe 3 away from the first main conveying pipe 1. The outer surface of the end of the first main conveying pipe 1 close to the second main conveying pipe 3 is a gradually tapered pipe, and the outer surface of the end of the second main conveying pipe 3 close to the third main conveying pipe 4 is a gradually tapered pipe. The outer surface of the third main conveying pipe 4 away from the second main conveying pipe 3 is a gradually tapered pipe. Fixed support frames 2 are fixedly installed on the outer surfaces of the first main conveying pipe 1, the second main conveying pipe 3, and the third main conveying pipe 4, and the outer surfaces of the fixed support frames 2 are fixed to the ground.

[0031] When in use, the use of fixed support frame 2 can ensure the concentricity between the first main conveying pipe 1, the second main conveying pipe 3, the third main conveying pipe 4, and the bend connector 5, so that the first main conveying pipe 1, the second main conveying pipe 3, the third main conveying pipe 4, and the bend connector 5 can be stably connected together, reducing the leakage of gas and limestone powder.

[0032] Firstly, during operation, limestone powder is conveyed to the first main conveying pipe 1 via a transmitter. The tapered diameter design of the first main conveying pipe 1 accelerates the flow of limestone powder, creating a stable jet that enters the second main conveying pipe 3. The tapered transition end of the second main conveying pipe 3 further optimizes the flow rate of the limestone powder. Finally, the tapered pipe of the third main conveying pipe 4 completes the three-stage acceleration process. The trapezoidal change in pipe diameter avoids sudden changes in local flow velocity caused by a single pipe diameter, ensuring that the limestone powder remains within the optimal conveying range. This prevents sedimentation and pipe blockage caused by excessively low flow velocity, while also avoiding pipe erosion and wear caused by excessively high flow velocity. This significantly extends the lifespan of the conveying equipment, reduces the likelihood of pipe blockage, and enhances the practicality of the conveying device.

[0033] A bend connector 5 is fixedly installed on the outer surface of one end of the third main conveying pipe 4. A feed pipe 8 is fixedly installed on the outer surface of the vertical distributor 7, and the feed pipe 8 is connected to one end of the bend connector 5. The bend connector 5 is an arc-shaped design, and a fixed support frame 2 is fixedly installed on the outer surface of the bend connector 5.

[0034] Secondly, the arc design of the bent pipe connector 5 reduces the resistance when limestone powder passes through, allowing the limestone powder to pass smoothly through the support frame 6 in a low-turbulence state and be introduced into the interior of the vertical distributor 7 from the feed pipe 8. This avoids powder deposition and conveying efficiency reduction caused by abrupt changes in the flow channel, and provides a continuous and stable feed for the vertical distributor 7.

[0035] The vertical distributor 7 has a tapered design at one end near the bend connector 5 and a tapered design at the other end away from the fixed support frame 2. Four discharge pipes 13 are fixedly opened on the outer surface of the vertical distributor 7, and branch pipes 14 are fixedly installed on the outer surface of the discharge pipes 13 respectively, and the branch pipes 14 are respectively connected to the boiler.

[0036] Furthermore, when limestone powder enters the vertical distributor 7, the conical design of the vertical distributor 7 reduces the chance of the limestone powder being blocked, allowing the limestone powder to enter smoothly and evenly into the four discharge pipes 13. The flow rate and resistance of the limestone powder are balanced through the four branch pipes 14, and the limestone powder is discharged into the interior of the boiler furnace through multiple points through the four branch pipes 14, so that the limestone powder can be evenly distributed inside the furnace, reducing the chance of pipe blockage and wear, while reducing the waste of resources caused by excessive input of limestone powder, and improving the efficiency and economy of desulfurization through limestone dispersion optimization.

[0037] The vertical distributor 7 has an inspection port 12 on its outer surface near the branch pipe 14. The inspection port 12 and the vertical distributor 7 are concentrically designed. A top cover 9 is inserted and installed on the outer surface of the inspection port 12. A handle 10 is fixedly installed on the outer surface of the top cover 9. The top cover 9 and the inspection port 12 are connected and fixed with screws. One end of the top cover 9 is chamfered. A sealing ring 11 is snapped onto the outer surface of the top cover 9. The outer surface of the sealing ring 11 is in contact with the outer surface of the inspection port 12. The outer surface of the inspection port 12 and the top cover 9 are concentrically designed.

[0038] Furthermore, once the limestone powder clumps together and remains inside the vertical distributor 7, the screws on the top cover 9 can be removed. Then, the top cover 9 can be removed from the inspection port 12 using the handle 10. The clumped limestone can then be removed, and the top cover 9 can be inserted back into the inspection port 12, ensuring that the sealing ring 11 fits tightly against the inspection port 12 to guarantee a tight seal. This greatly improves the convenience of maintaining the conveying device.

[0039] Working Principle: During operation, limestone powder is fed into the first main conveying pipe 1 via a transmitter. It then accelerates through the first main conveying pipe 1 and a conical pipe into the second main conveying pipe 3. Finally, it enters the third main conveying pipe 4 through the conical pipe of the second main conveying pipe 3. The multi-stage diameter reduction of the first, second, and third main conveying pipes 1 and 4 prevents limestone from accumulating and causing blockages. The limestone powder is then fed into the feed pipe 8 via a bend connector 5, allowing it to be delivered into the vertical distributor 7. Finally, it is fed into the branch pipes 14 through four discharge pipes 13. These branch pipes 14 deliver the limestone powder into the boiler cavity at multiple points, ensuring even distribution within the cavity, improving desulfurization efficiency, reducing limestone powder input, and minimizing the likelihood of pipe blockages.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A boiler desulfurization conveying device based on multi-point distribution and multi-stage variable diameter synergistic optimization, comprising a first main conveying pipeline (1), one end of the first main conveying pipeline (1) being connected to a transmitter of a limestone compartment, a support frame (6) being placed on the ground on one side of the first main conveying pipeline (1), and a vertical distributor (7) being fixedly installed on the outer surface of the support frame (6), characterized in that: A second main conveying pipe (3) is fixedly installed on the outer surface of one end of the first main conveying pipe (1), and a third main conveying pipe (4) is fixedly installed on the outer surface of the second main conveying pipe (3) away from the first main conveying pipe (1). The outer surface of the first main conveying pipe (1) near the second main conveying pipe (3) is a tapered pipe that gradually narrows, and the outer surface of the second main conveying pipe (3) near the third main conveying pipe (4) is a tapered pipe that gradually narrows. The outer surface of the third main conveying pipe (4) away from the second main conveying pipe (3) is a tapered pipe that gradually narrows.

2. The boiler desulfurization conveying device based on multi-point distribution and multi-stage variable diameter collaborative optimization according to claim 1, characterized in that: The outer surfaces of the first main conveying pipe (1), the second main conveying pipe (3) and the third main conveying pipe (4) are respectively fixedly installed with fixed support frames (2), and the outer surfaces of the fixed support frames (2) are fixed to the ground.

3. The boiler desulfurization conveying device based on multi-point distribution and multi-stage variable diameter collaborative optimization according to claim 1, characterized in that: A bend connector (5) is fixedly installed on the outer surface of one end of the third main conveying pipe (4), and a feed pipe (8) is fixedly installed on the outer surface of the vertical distributor (7). The feed pipe (8) is connected to one end of the bend connector (5). The bend connector (5) is arc-shaped, and a fixed support frame (2) is fixedly installed on the outer surface of the bend connector (5).

4. The boiler desulfurization conveying device based on multi-point distribution and multi-stage variable diameter collaborative optimization according to claim 1, characterized in that: The vertical distributor (7) has a tapered design at the end near the bend connector (5), and the vertical distributor (7) also has a tapered design at the end away from the fixed support frame (2).

5. The boiler desulfurization conveying device based on multi-point distribution and multi-stage variable diameter collaborative optimization according to claim 1, characterized in that: The vertical distributor (7) has four discharge pipes (13) fixedly opened on its outer surface, and branch pipes (14) are fixedly installed on the outer surface of the discharge pipes (13), and the branch pipes (14) are respectively connected to the boiler.

6. The boiler desulfurization conveying device based on multi-point distribution and multi-stage variable diameter collaborative optimization according to claim 1, characterized in that: The vertical distributor (7) has an inspection port (12) on the outer surface of one end near the branch pipe (14), and the inspection port (12) and the vertical distributor (7) are designed concentrically. A top cover (9) is inserted and installed on the outer surface of the inspection port (12), and a handle (10) is fixedly installed on the outer surface of the top cover (9). The top cover (9) and the inspection port (12) are connected and fixed with screws.

7. The boiler desulfurization conveying device based on multi-point distribution and multi-stage variable diameter collaborative optimization according to claim 6, characterized in that: One end of the top cover (9) is chamfered, and a sealing ring (11) is fitted on the outer surface of the top cover (9). The outer surface of the sealing ring (11) is in contact with the outer surface of the inspection port (12). The outer surface of the inspection port (12) and the top cover (9) are concentrically designed.

Images