Device for cloth bag ash recycling

Abstract

The utility model provides a device for cloth bag ash recycling, its technical scheme is: including cloth bag dust catcher, the cloth bag dust catcher's ash outlet is connected with the feed inlet of bin pump through first conveying pipeline, the bin pump's discharge port is connected with one end of second conveying pipeline through first downpipe, the other end of second conveying pipeline is connected to intermediate bin, the discharge port of intermediate bin is connected with one end of pre-coated ash pipeline through second downpipe, the other end of pre-coated ash pipeline is connected to the feed inlet of cloth bag dust catcher. The utility model has the advantages of: (1) improving resource utilization, reducing waste; (2) reducing operating cost, optimizing economy; (3) stabilizing environmental protection index, reducing the risk of exceeding the standard.

Description

Technical Field

[0001] This utility model relates to the field of industrial flue gas treatment technology, and in particular to a device for recycling bag filter ash. Background Technology

[0002] In existing technologies, the bag filter ash generated by desulfurization systems is typically directly transported to an ash silo for waste disposal. Since the bag filter ash has a high calcium carbonate content (approximately 35%), direct disposal not only increases treatment costs but also wastes resources. Furthermore, traditional processes consume large amounts of limestone, and environmental data is prone to exceeding limits during system start-up and shutdown.

[0003] Therefore, there is an urgent need for a device to recycle bag ash and reduce resource waste. Summary of the Invention

[0004] To address the problems of the prior art, this utility model provides a device for recycling bag filter dust. The technical solution includes a bag filter dust collector. The dust outlet of the bag filter dust collector is connected to the inlet of a silo pump via a first conveying pipe. The outlet of the silo pump is connected to one end of a second conveying pipe via a first discharge pipe. The other end of the second conveying pipe is connected to an intermediate silo. The outlet of the intermediate silo is connected to one end of a pre-coated ash pipe via a second discharge pipe. The other end of the pre-coated ash pipe is connected to the inlet of the bag filter dust collector.

[0005] In a preferred embodiment, the conveying pipeline is equipped with a silo pump inlet valve;

[0006] The first discharge pipe is equipped with a first discharge valve.

[0007] In a preferred embodiment, the second conveying pipe is provided with a switching valve at one end near the first discharge pipe and a feeding valve at the other end near the intermediate hopper.

[0008] In a preferred embodiment, the second discharge pipe is provided with a second discharge valve at one end near the discharge port of the intermediate silo, and a pre-coated ash valve at the other end near the bag filter.

[0009] In a preferred embodiment, the second feeding pipe is connected to one end of the pre-coated ash pipe via a tee, and the second feeding pipe is also connected to one end of the recycled ash pipe via a tee. The other end of the recycled ash pipe is connected to the inlet of the limestone furnace front silo, and the outlet of the limestone furnace front silo is connected to the inlet of the furnace via a third feeding pipe.

[0010] In a more preferred embodiment, the ash recycling pipe is equipped with a recycling feed valve;

[0011] The third discharge pipe is equipped with a third discharge valve.

[0012] In a preferred embodiment, the first feeding pipe is connected to one end of the second conveying pipe via a tee, and the first feeding pipe is also connected to one end of the ash conveying pipe via a tee, with the other end of the ash conveying pipe connected to the inlet of the ash silo.

[0013] In a more preferred embodiment, the ash conveying pipe is equipped with an ash inlet valve.

[0014] The beneficial effects of this utility model are:

[0015] (1) The device returns the bag dust to the bag filter through the pre-coated ash pipe, and uses the high calcium carbonate content (about 35%) in the bag dust to replace part of the new limestone as the pre-coated ash raw material, thereby reducing the dependence on fresh limestone and reducing resource waste.

[0016] The recycling pipeline guides the bag filter ash into the limestone furnace front silo, where it is mixed with limestone and then sent into the furnace to participate in the reaction. This further taps into the calcium-based resource value of the bag filter ash, realizing the circular transformation of waste into raw materials and improving the utilization rate of the bag filter ash.

[0017] (2) Reduce the processing costs of transporting bag ash to the ash storage (such as transportation and landfill costs), and at the same time reduce the raw material procurement costs by replacing part of the limestone, thereby reducing the overall operating costs;

[0018] The buffer function of the intermediate silo can balance the output and consumption rhythm of bag filter ash, avoid system downtime or resource idleness caused by instantaneous output fluctuations, and improve equipment operating efficiency.

[0019] (3) Reduce the time when environmental data exceeds the limit during system start-up and shutdown by about 50%. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0021] In the diagram: 1. Baghouse dust collector; 2. First conveying pipe; 3. Silo pump feed valve; 4. Silo pump; 5. First discharge valve; 6. First discharge pipe; 7. Ash conveying pipe; 8. Ash inlet valve; 9. Ash silo; 10. Switching valve; 11. Second conveying pipe; 12. Feed valve; 13. Intermediate silo; 14. Second discharge pipe; 15. Second discharge valve; 16. Pre-coated ash pipe; 17. Pre-coated ash valve; 18. Recycled ash pipe; 19. Recycled feed valve; 20. Limestone furnace front silo; 21. Third discharge pipe; 22. Third discharge valve; 23. Furnace chamber. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0023] Example

[0024] like Figure 1 The apparatus shown for recycling bag filter dust includes a bag filter 1. The dust outlet of the bag filter 1 is connected to the inlet of a silo pump 4 via a first conveying pipe 2. The outlet of the silo pump 4 is connected to one end of a second conveying pipe 11 via a first discharge pipe 6. The other end of the second conveying pipe 11 is connected to an intermediate silo 13. The outlet of the intermediate silo 13 is connected to one end of a pre-coated ash pipe 16 via a second discharge pipe 14. The other end of the pre-coated ash pipe 16 is connected to the inlet of the bag filter 1.

[0025] The bag dust collected by the bag dust collector 1 is transported to the intermediate silo 13 by the silo pump 4. The intermediate silo 13 then transports the bag dust back to the bag dust collector 1 for use as pre-coated ash through the pre-coated ash pipe 16, thereby reducing the consumption of limestone. The silo pump 4 serves as the pneumatic power source for the overall system's pneumatic conveying.

[0026] Furthermore, the conveying pipeline 2 is equipped with a silo pump inlet valve 3;

[0027] The first discharge pipe 6 is equipped with a first discharge valve 5.

[0028] Furthermore, the second conveying pipe 11 is provided with a switching valve 10 at one end near the first discharge pipe 6 and a feed valve 12 at the other end near the intermediate hopper 13.

[0029] Furthermore, the second discharge pipe 14 is provided with a second discharge valve 15 at one end near the discharge port of the intermediate silo 13, and a pre-coated ash valve 17 at the other end near the bag filter 1.

[0030] Furthermore, the second feeding pipe 14 is connected to one end of the pre-coated ash pipe 16 via a tee, and the second feeding pipe 14 is also connected to one end of the recycled ash pipe 18 via a tee. The other end of the recycled ash pipe 18 is connected to the inlet of the limestone furnace front silo 20, and the outlet of the limestone furnace front silo 20 is connected to the inlet of the furnace 23 via the third feeding pipe 21.

[0031] Because the demand for pre-coated lime is limited, the excess bag lime is fed into the furnace 23 through the ash recycling pipe 18 and used as raw material, further reducing the consumption of raw material limestone and further reducing costs.

[0032] Furthermore, the recycling ash pipe 18 is equipped with a recycling feed valve 19;

[0033] The third discharge pipe 21 is equipped with a third discharge valve 22.

[0034] Furthermore, the first feeding pipe 6 is connected to one end of the second conveying pipe 11 via a tee, and the first feeding pipe 6 is also connected to one end of the ash conveying pipe 7 via a tee, and the other end of the ash conveying pipe 7 is connected to the inlet of the ash silo 9.

[0035] Any excess bagged ash is transported to ash storage 9 for storage.

[0036] Furthermore, the ash conveying pipe 7 is equipped with an ash inlet valve 8.

[0037] All of the above valves are pneumatic valves.

[0038] The operation of the above-mentioned device is as follows: the bag dust collected by the bag dust collector 1 is discharged from the ash outlet. At this time, the feed valve 3 of the silo pump is opened and the other valves are closed. The bag dust enters the silo pump 4 through the first conveying pipe 2 until the silo pump reaches the preset material level. The feed valve 3 of the silo pump is closed and the silo pump 4 is pressurized (driven by compressed air). Then the first discharge valve 5 is opened, and the switching valve 10 is switched to the direction of the second conveying pipe 11 (disconnected from the ash conveying pipe 7). The bag dust is conveyed through the first discharge pipe 6 and the second conveying pipe 11. The feed valve 12 is opened and the bag dust enters the intermediate silo 13.

[0039] Two recycling pathways for bag filter dust:

[0040] Path 1: Open the second discharge valve 15 and the pre-coated ash valve 17, and close the other related valves;

[0041] The bag dust in the intermediate silo 13 is transported to the inlet of the bag dust collector 1 through the second discharge pipe 14 and the pre-coated dust pipe 16, and is used as a pre-coated dust raw material to replace part of the new limestone;

[0042] When the pre-coating is completed or the material level in the intermediate silo is too low, close the second discharge valve 15 and the pre-coating valve 17 to suspend the path.

[0043] Path 2: When it is necessary to replenish the calcium-based raw material in the limestone furnace front silo 20, open the second discharge valve 15 and the recovery feed valve 19, and close the other related valves;

[0044] The bag ash enters the limestone furnace front silo 20 through the second feeding pipe 14 and the recycling ash pipe 18, where it is mixed with fresh limestone.

[0045] When it is necessary to supply material to the furnace 23, the third discharge valve 22 is opened, and the mixed material is sent into the furnace through the third feeding pipe 21 to participate in the reaction; after the material supply is completed, the third discharge valve 22 is closed; when the material level in the intermediate silo is insufficient, the second discharge valve 15 and the recovery feed valve 19 are closed.

[0046] Backup path: In case of recycling system failure or substandard bag filter ash quality,

[0047] After the silo pump 4 completes feeding, the first discharge valve 5 opens, and at the same time the switching valve 10 switches to the direction of the ash conveying pipe 7 (disconnecting from the second conveying pipe 11).

[0048] Open the ash inlet valve 8, and the bag ash is transported to the ash silo 9 for temporary storage via the first discharge pipe 6 and the ash conveying pipe 7.

[0049] After the conveying is completed, close the first discharge valve 5 and the ash inlet valve 8, and reset the switching valve 10.

[0050] The valve linkage control logic is as follows:

[0051] Interlocking relationship: The switching valve 10 can only connect one path at a time (the second conveying pipe 11 or the ash conveying pipe 7) to avoid material diversion; at the tee of the second discharge pipe 14, the pre-coated ash valve 17 and the recovery feed valve 19 do not open at the same time to prevent material collision.

[0052] Automated regulation: The opening and closing of each valve is automatically controlled by the control system based on the material level gauge (silo pump, intermediate silo, ash silo) and working conditions (such as pre-coating ash instructions and furnace feeding signals), realizing unattended operation.

Claims

1. Device for fabric bag ash recycling, comprising a fabric bag dust collector (1), characterized in that, The ash outlet of the bag filter (1) is connected to the inlet of the silo pump (4) through the first conveying pipe (2). The outlet of the silo pump (4) is connected to one end of the second conveying pipe (11) through the first discharge pipe (6). The other end of the second conveying pipe (11) is connected to the intermediate silo (13). The outlet of the intermediate silo (13) is connected to one end of the pre-coated ash pipe (16) through the second discharge pipe (14). The other end of the pre-coated ash pipe (16) is connected to the inlet of the bag filter (1).

2. The apparatus for cloth bag ash recycling according to claim 1, characterized in that, The conveying pipeline (2) is equipped with a silo pump inlet valve (3); The first discharge pipe (6) is equipped with a first discharge valve (5).

3. The apparatus for cloth bag ash recycling according to claim 1, characterized in that, The second conveying pipe (11) is provided with a switching valve (10) at one end near the first discharge pipe (6) and a feed valve (12) at the other end near the intermediate silo (13).

4. The apparatus for recycling bag filter ash according to claim 1, characterized in that, The second discharge pipe (14) is equipped with a second discharge valve (15) at one end near the discharge port of the intermediate silo (13), and a pre-coated ash valve (17) at the other end near the bag filter (1).

5. The apparatus for recycling bag filter ash according to claim 1, characterized in that, The second feeding pipe (14) is connected to one end of the pre-coated ash pipe (16) via a tee. The second feeding pipe (14) is also connected to one end of the recycled ash pipe (18) via a tee. The other end of the recycled ash pipe (18) is connected to the feed inlet of the limestone furnace front silo (20). The discharge outlet of the limestone furnace front silo (20) is connected to the feed inlet of the furnace (23) via the third feeding pipe (21).

6. The apparatus for recycling bag filter ash according to claim 5, characterized in that, The recycling ash pipe (18) is equipped with a recycling feed valve (19); The third discharge pipe (21) is equipped with a third discharge valve (22).

7. The apparatus for recycling bag filter ash according to claim 1, characterized in that, The first feeding pipe (6) is connected to one end of the second conveying pipe (11) via a tee. The first feeding pipe (6) is also connected to one end of the ash conveying pipe (7) via a tee. The other end of the ash conveying pipe (7) is connected to the inlet of the ash silo (9).

8. The apparatus for recycling bag filter ash according to claim 7, characterized in that, The ash conveying pipe (7) is equipped with an ash inlet valve (8).

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