Coke and ash separation and recovery device for waste heat boiler

Abstract

The utility model relates to the field of nonferrous metallurgy technology, and specifically provides a waste heat boiler coking and ash separation and recovery device, aims at solving the jamming and damage problem of the scraper conveyor and the coking problem of the radiation area. The utility model includes the boiler body, chain plate conveyer, ration belt conveyer and smelting furnace, and the one end of boiler body bottom is successively installed with the ash bucket, the blanking pipe, the blanking bin, and the radiation area coking and ash fall into the ash bucket, and after the buffering through the blanking pipe and sent to the blanking bin, carries out the crushing, and the other end is successively installed with the ash pipe, the retention part, and the convection zone ash is concentrated through the scraper conveyor, and then falls down through the ash pipe and the unloading valve control in the retention part, and the boiler is provided with the inverted slope, promotes the ash natural slide and falls down together with the coking after the crushing in the ration belt conveyer, and through two process treatments, achieves the separation, collection and closed conveying of the ash and coking, reduces the occurrence of equipment jamming.

Description

Technical Field

[0001] This utility model relates to the field of non-ferrous metallurgical technology, specifically to a waste heat boiler coking and flue ash separation and recovery device. Background Technology

[0002] In the industrial production sector, waste heat boilers, as a highly efficient heat energy conversion device, are widely used in various smelting industries, playing an irreplaceable role in improving energy utilization efficiency and promoting industrial upgrading. However, with the increasing complexity of the mineral materials used and the continuous increase in the amount of feed, some problems have also been exposed during the operation of waste heat boilers, among which the problems of jamming and damage to scraper conveyors and coking in the radiant zone are particularly prominent.

[0003] The occurrence of such blockages and damage not only disrupts the normal delivery of soot and affects the continuous and stable operation of the boiler, but also significantly increases the company's maintenance costs and downtime, reducing production efficiency and economic benefits. On the other hand, boiler coking not only reduces the heat transfer efficiency of the radiant zone, causing a decrease in the boiler's thermal energy conversion efficiency, but may also lead to localized overheating, causing safety accidents and posing a serious threat to the safety of personnel and equipment.

[0004] In view of the above, this application is hereby submitted. Utility Model Content

[0005] The purpose of this invention is to provide a waste heat boiler coking and flue ash separation and recovery device to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention provides a waste heat boiler coking and flue ash separation and recovery device, which includes a boiler body, a chain conveyor, a quantitative belt conveyor and a smelting furnace. A ash discharge pipe and an ash hopper are installed sequentially at one end of the bottom of the boiler body, wherein the ash hopper is located closer to the end of the boiler body. A discharge pipe is installed at the bottom of the ash hopper, and a discharge bin is located on the outer side of the bottom of the discharge pipe. The discharge bin is located above the chain conveyor.

[0007] A herringbone ramp is provided on the inner wall of the bottom of the boiler body between the lower ash pipe and the ash hopper. Inclined sections are provided on both sides of the top of the herringbone ramp along the length of the boiler body. A scraper conveyor is provided at the end of the boiler body away from the lower ash pipe, and the scraper conveyor is positioned towards the connection between the lower ash pipe and the boiler body.

[0008] A retention section is provided at the bottom of the ash pipe. The retention section is located above the quantitative belt conveyor. Both the retention section and the chain conveyor are located above the quantitative belt conveyor. A crusher is located below the end of the chain conveyor away from the discharge hopper. The crusher is located above the quantitative belt conveyor. The two inclined sections are symmetrically arranged about the axis of symmetry in the width direction of the herringbone slope, and the inclination angle of one side of the inclined section is 45 degrees. The bottom of the inclined section and the top of the scraper conveyor are on the same horizontal plane.

[0009] Furthermore, a closing door is provided on the outer wall of the boiler body at a position corresponding to the herringbone slope, and a manual maintenance port is provided on the outer wall of the boiler body at a position away from the ash discharge pipe of the scraper conveyor. A smelting furnace is provided below the end of the quantitative belt conveyor away from the retention section, and a hopper is provided on the top of the smelting furnace near the quantitative belt conveyor. An ash discharge valve is horizontally rotatably installed inside the retention section. The axial direction of the retention section is consistent with the length direction of the ash discharge pipe. Multiple baffles are installed on the outer arc wall of the ash discharge valve in a circular array about the axial direction of the retention section. The end of the baffle away from the retention section slides against the inner arc wall of the retention section. A drive motor is fixed along the axial direction on the outer wall of the retention section.

[0010] Furthermore, the crusher can be one of a jaw crusher, a double roll crusher, or an impact crusher. The horizontal height of the end of the chain conveyor away from the feed hopper is higher than the horizontal height of the end of the chain conveyor near the feed hopper, and the two ends are inclined to transition. The projection of the retention part and the chain conveyor in the vertical direction do not overlap. The projections of the crusher and the smelting furnace in the vertical direction do not overlap. The retention part and the crusher are located in the same horizontal plane. The effective working length of the quantitative belt conveyor is greater than the distance between the retention part and the crusher.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. By separating coke and soot, the normal operation of the scraper conveyor is protected, thereby extending its service life. The separated soot and coke are then transferred to the smelting furnace. Large pieces of coke are crushed for subsequent recycling. In summary, the recycling of soot and coke is achieved, improving production efficiency and economic benefits, and reducing the occurrence of blockages.

[0013] 2. The inclined section avoids the problem of soot accumulating on the platform and forming coke. The inclined section effectively promotes the natural sliding of soot. The closed door facilitates the staff to regularly clean the coke in the inclined area and ensures the sealing of the boiler body at other times. Attached Figure Description

[0014] Figure 1 A schematic diagram showing the overall structural positional relationship of the waste heat boiler coking and flue ash separation and recovery device;

[0015] Figure 2 This is a schematic diagram of the internal structure of the boiler body in the waste heat boiler coking and flue ash separation and recovery device.

[0016] Figure 3 This is a cross-sectional view of the internal structure of the ash discharge pipe and ash unloading valve in the coking and ash separation and recovery device of the waste heat boiler.

[0017] In the picture:

[0018] 10. Boiler body; 101. Closing door; 11. Ash hopper; 12. Feed pipe; 13. Feed bin;

[0019] 14. Ash discharge pipe; 15. Retention section; 151. Ash discharge valve; 16. Chain conveyor; 17. Crusher;

[0020] 18. Quantitative belt conveyor; 19. Smelting furnace; 191. Feed hopper;

[0021] 20. Herringbone ramp; 21. Inclined section; 22. Scraper conveyor. Detailed Implementation

[0022] 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.

[0023] Please see the appendix Figure 1 To be continued Figure 3 The waste heat boiler coking and flue ash separation and recovery device provided by this utility model includes a boiler body 10, a chain conveyor 16, a quantitative belt conveyor 18 and a smelting furnace 19. The bottom end of the boiler body 10 is sequentially equipped with an ash discharge pipe 14 and an ash hopper 11, wherein the ash hopper 11 is located closer to the end of the boiler body 10. A discharge pipe 12 is installed at the bottom of the ash hopper 11, and a discharge bin 13 is provided on the outer side of the bottom of the discharge pipe 12. The discharge bin 13 is located above the chain conveyor 16.

[0024] A herringbone ramp 20 is provided on the bottom inner wall of the boiler body 10 between the lower ash pipe 14 and the ash hopper 11. Inclined parts 21 are provided on both sides of the top of the herringbone ramp 20 along the length of the boiler body 10. A scraper conveyor 22 is provided at the end of the boiler body 10 away from the lower ash pipe 14. The scraper conveyor 22 is positioned towards the connection between the lower ash pipe 14 and the boiler body 10.

[0025] The bottom end of the ash pipe 14 is provided with a retention part 15, which is located above the quantitative belt conveyor 18. Both the retention part 15 and the chain plate conveyor 16 are located above the quantitative belt conveyor 18. The chain plate conveyor 16 is provided with a crusher 17 below the end away from the discharge bin 13, which is located above the quantitative belt conveyor 18.

[0026] The two inclined sections 21 are symmetrically arranged about the line of symmetry in the width direction of the herringbone ramp 20, and the inclination angle of one side of the inclined section 21 is 45 degrees. The bottom end of the inclined section 21 and the top end of the scraper conveyor 22 are on the same horizontal plane.

[0027] A closing door 101 is provided on the outer wall of the boiler body 10 at the position corresponding to the herringbone ramp 20. A manual maintenance port is provided on the outer wall of the boiler body 10 at the position of the scraper conveyor 22 away from the ash pipe 14. A smelting furnace 19 is provided below the end of the quantitative belt conveyor 18 away from the retention part 15. A hopper 191 is provided on the top of the smelting furnace 19 near the quantitative belt conveyor 18.

[0028] It should be noted that the tail section of the scraper conveyor 22 is moved to the position of the convection zone of the boiler body 10 for positioning and installation. An ash hopper 11 and a feed pipe 12 are set below the radiation zone of the boiler body 10. An ash discharge pipe 14 is connected below the convection zone. The ash hopper 11 is used to collect the fallen coke blocks. The size of the ash hopper 11 can accommodate a certain amount of coke blocks.

[0029] To ensure equipment maintenance accessibility, a manual inspection port is reserved to facilitate observation of the working condition of the scraper conveyor 22. Considering that soot is prone to accumulate on the platform above this area and form coking, an inclined section 21 is used here, arranged with two opposite 45-degree inclination angles, which can effectively promote the natural sliding of soot.

[0030] To further enhance the anti-coking performance, closed doors 101 are added on both sides of the boiler body 10 along its width direction, corresponding to the positions of the herringbone ramps 20. This ensures the airtightness of the boiler body 10 and facilitates the regular cleaning of coking in the ramp area by the staff. In this way, the flue dust in the convection zone of the boiler body 10 is centrally processed by the scraper conveyor 22 and then transported through the ash discharge pipe 14. The coking and flue dust in the radiation zone are collected by the ash hopper 11 and then transported through the discharge pipe 12, thereby realizing the separation, collection and airtight transport of flue dust and coking.

[0031] Please see the appendix Figure 1 To be continued Figure 3The present invention provides a technical solution: a ash discharge valve 151 is horizontally rotatably arranged inside the retention part 15. The axial direction of the retention part 15 is consistent with the length direction of the lower ash pipe 14. Multiple baffles are installed on the outer arc wall of the ash discharge valve 151 in a ring array about the axial direction of the retention part 15. The end of the baffle away from the retention part 15 slides against the inner arc wall of the retention part 15. A drive motor is fixed along the axial direction on the outer wall of the retention part 15.

[0032] The crusher 17 can be one of a jaw crusher, a double roll crusher, or an impact crusher. The horizontal height of the end of the chain conveyor 16 away from the feed hopper 13 is higher than the horizontal height of the end of the chain conveyor 16 close to the feed hopper 13, and the two ends are inclined to transition.

[0033] The projections of the retention section 15 and the chain conveyor 16 in the vertical direction do not overlap, and the projections of the crusher 17 and the smelting furnace 19 in the vertical direction do not overlap. The retention section 15 and the crusher 17 are located in the same horizontal plane, and the effective working length of the quantitative belt conveyor 18 is greater than the distance between the retention section 15 and the crusher 17.

[0034] It should be noted that the feeding hopper 13 is for collecting the coke in the feeding pipe 12 and also serves as a buffer to prevent the coke from accumulating or spilling due to the untimely transport by the chain conveyor 16. Furthermore, the feeding hopper 13 adopts a high-strength structure to resist the impact of the falling coke.

[0035] The coke produced in the boiler body 10 is conveyed in a closed manner through the feed pipe 12 and centrally transported to the feed hopper 13. A chain conveyor 16 is installed at the discharge port at the bottom of the feed hopper 13 to ensure that large pieces of coke can also be reliably transported. The chain conveyor 16 continuously transfers the coke to the crusher 17, where the coke is crushed into small pieces that can be fed into the furnace. After crushing, the coke is transported by a quantitative belt conveyor 18 to facilitate subsequent statistics on the total amount of coke entering the furnace.

[0036] The feed pipe 12 can smoothly transport the coke blocks in the ash hopper 11 to the feed bin 13. The ash discharge pipe 14 is used to transport boiler flue ash to the quantitative belt conveyor 18 so that it can be smoothly fed into the furnace. The retention part 15 and the ash discharge valve 151 are installed below the ash discharge pipe 14. The baffle on the outer arc wall of the ash discharge valve 151 slides and abuts against the inner arc wall of the retention part 15 to ensure the boiler is sealed.

[0037] The soot produced in the boiler is conveyed through the ash discharge pipe 14, and after passing through the retention section 15, it falls onto the quantitative belt conveyor 18. The quantitative belt conveyor 18 then conveys the coke crushed in the crusher 17 and the soot from the ash discharge pipe 14 together to the feed hopper 191. Finally, the soot and coke enter the smelting furnace 19 through the feed hopper 191 for subsequent operations.

[0038] Working principle:

[0039] In the boiler body 10, coke and soot in the radiation zone fall into the ash hopper 11, are conveyed to the feeding bin 13 for buffering via the feeding pipe 12, and are then transferred to the crusher 17 by the chain conveyor 16 to be crushed into small pieces. The soot in the convection zone is concentrated by the scraper conveyor 22 and controlled to fall by the ash discharge valve 151 in the ash discharge pipe 14 and the retention section 15, and falls onto the quantitative belt conveyor 18 together with the crushed coke.

[0040] The quantitative belt conveyor 18 transports coke and soot to the hopper 191 of the smelting furnace 19, achieving closed entry into the furnace. During this process, the herringbone ramp 20 and the inclined section 21 promote the natural sliding of soot. The closed door 101 facilitates the cleaning of coke. The manual inspection port allows for easy observation of the working status of the scraper conveyor 22. The discharge bin 13 resists the impact of coke and ensures stable conveying. Finally, the separation, collection and closed conveying of soot and coke are completed.

Claims

1. A waste heat boiler coking and ash separation and recovery device, comprising a boiler body (10), a chain conveyor (16), a quantitative belt conveyor (18), and a smelting furnace (19), characterized in that: The bottom end of the boiler body (10) is sequentially equipped with a ash pipe (14) and an ash hopper (11), wherein the ash hopper (11) is located closer to the end of the boiler body (10), and a feeding pipe (12) is installed at the bottom of the ash hopper (11). A feeding bin (13) is located on the outer side of the bottom of the feeding pipe (12), and the feeding bin (13) is located above the chain conveyor (16). A herringbone ramp (20) is provided on the inner wall of the bottom of the boiler body (10) between the lower ash pipe (14) and the ash hopper (11). An inclined part (21) is provided on both sides of the top of the herringbone ramp (20) along the length of the boiler body (10). A scraper conveyor (22) is provided at the end of the boiler body (10) away from the lower ash pipe (14). The scraper conveyor (22) is located towards the connection between the lower ash pipe (14) and the boiler body (10). The bottom end of the ash pipe (14) is provided with a retention part (15), which is located above the quantitative belt conveyor (18). Both the retention part (15) and the chain plate conveyor (16) are located above the quantitative belt conveyor (18). A crusher (17) is located below the end of the chain plate conveyor (16) away from the discharge bin (13), which is located above the quantitative belt conveyor (18).

2. The waste heat boiler coking and flue ash separation and recovery device as described in claim 1, characterized in that: The two inclined sections (21) are symmetrically arranged about the symmetrical line in the width direction of the herringbone ramp (20), and the inclination angle of one of the inclined sections (21) is 45 degrees. The bottom end of the inclined section (21) and the top end of the scraper conveyor (22) are on the same horizontal plane.

3. The waste heat boiler coking and flue ash separation and recovery device as described in claim 1, characterized in that: A closing door (101) is provided on the outer wall of the boiler body (10) at a position corresponding to the herringbone slope (20), and a manual inspection port is provided on the outer wall of the boiler body (10) at a position corresponding to the scraper conveyor (22) away from the ash pipe (14).

4. The waste heat boiler coking and flue ash separation and recovery device as described in claim 1, characterized in that: A smelting furnace (19) is provided below the end of the quantitative belt conveyor (18) away from the retention section (15), and a hopper (191) is provided on the top of the smelting furnace (19) near the quantitative belt conveyor (18).

5. The waste heat boiler coking and flue ash separation and recovery device as described in claim 1, characterized in that: A discharge valve (151) is horizontally rotatably installed inside the retention section (15). The axial direction of the retention section (15) is consistent with the length direction of the lower ash pipe (14). Multiple baffles are installed on the outer arc wall of the discharge valve (151) in a ring array about the axial direction of the retention section (15). The end of the baffle away from the retention section (15) slides against the inner arc wall of the retention section (15). A drive motor is fixed along the axial direction on the outer wall of the retention section (15).

6. The waste heat boiler coking and flue ash separation and recovery device as described in claim 1, characterized in that: The crusher (17) can be one of a jaw crusher, a double roll crusher, or an impact crusher. The horizontal height of the end of the chain conveyor (16) away from the feed hopper (13) is higher than the horizontal height of the end of the chain conveyor (16) close to the feed hopper (13), and the two ends are inclined to transition.

7. The waste heat boiler coking and flue ash separation and recovery device as described in claim 1, characterized in that: The projections of the retention section (15) and the chain conveyor (16) in the vertical direction do not overlap. The projections of the crusher (17) and the smelting furnace (19) in the vertical direction do not overlap. The retention section (15) and the crusher (17) are located in the same horizontal plane. The effective working length of the quantitative belt conveyor (18) is greater than the distance between the retention section (15) and the crusher (17).

Images