Device for improving utilization rate of effective components of calcium-based desulfurization by-product

Abstract

The utility model discloses a device for improving the utilization rate of effective components of calcium-based desulfurization byproducts, and relates to the technical field of flue gas desulfurization. According to the device applied to improving the utilization rate of the effective components of the calcium-based desulfurization byproducts, through the arrangement of the material returning device, the byproducts can be recycled in a desulfurization process, the content of the effective components in the byproducts is fully reduced, meanwhile, the byproducts can be put into an SDA semi-dry desulfurization process and a CFB desulfurization process to be used, the utilization rate is increased, and the utilization rate of the byproducts is increased. Meanwhile, the raw material consumption of the process is reduced, the circulation and desulfurization effects of byproducts can be guaranteed through cooperation of the blowing assembly and the crushing assembly, meanwhile, the phenomenon that circulating ash is agglomerated due to the fact that the ash conveying pressure of a circulating system is large can be avoided, and the conveying effect of the byproducts and the utilization rate of effective components are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas desulfurization, in particular to a device used for improving the utilization rate of effective components of calcium-based desulfurization by-products. Background Art

[0002] my country has conducted research on a variety of desulfurization technologies, which can be mainly divided into pre-combustion desulfurization, desulfurization during combustion and post-combustion desulfurization. Among them, post-combustion desulfurization, also known as flue gas desulfurization, is the most efficient and widely used desulfurization technology at present;

[0003] Referring to the Chinese patent, application number: "2022206175050.2" "A calcium-based dry desulfurization system for flue gas in the coking industry", this patent solves the problem that in the existing dry desulfurization, after the desulfurizer reacts with acidic pollutants such as SO2 in the flue gas, there is still desulfurizer that has not participated in the reaction. The desulfurization ash obtained after the reaction with the pollutants in the flue gas is discharged, resulting in low utilization rate of the desulfurizer. However, there is still a phenomenon that the circulating by-products are prone to agglomeration, resulting in a large number of effective ingredients in the by-products after the circulation. At the same time, the by-product with low utilization rate is difficult to introduce into other processes. In this regard, we propose a device for improving the utilization rate of effective ingredients in calcium-based desulfurization by-products to solve the above problems. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model provides a device for improving the utilization rate of effective components of calcium-based desulfurization by-products, which solves the problems raised in the above-mentioned background technology.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a device for improving the utilization rate of effective components of calcium-based desulfurization by-products, specifically comprising the following steps:

[0006] S1. Send the by-products to the bottom of the CFB desulfurization tower, and the by-products follow the flue gas in the flue into the CFB desulfurization tower to participate in the desulfurization reaction;

[0007] S2. The by-products after the reaction pass through the CFB bag filter with the flue gas to separate the by-products from the flue gas. The filtered by-products are returned to the CFB desulfurization tower through the return device for cyclic reaction;

[0008] S3. When the by-products circulate a certain number of times through the return device, they are discharged into the ash storage of the CFB desulfurization system through the silo pump for centralized treatment.

[0009] Preferably, a dust collecting hopper is fixed at the end of the return device, and the dust collecting hopper is fixed at the bottom of the CFB bag filter to collect the filtered by-products;

[0010] The end of the dust collecting hopper is provided with a blowing assembly for blowing the by-products falling into the dust collecting hopper so that they return to the CFB desulfurization tower for a circulation reaction;

[0011] A crushing component is provided inside the material returning device for crushing the agglomerated by-products.

[0012] Preferably, the blowing assembly includes a blowing frame, wherein a cavity is provided inside the blowing frame and a plurality of exhaust ports are provided inside the blowing frame, and a hair dryer connected to the blowing frame is fixed on the outside of the blowing frame.

[0013] Preferably, the crushing assembly includes a connecting plate frame, a plurality of elastic pull ropes are fixed inside the return device, and a plurality of crushing needle strips are fixed at the bottom of the elastic pull ropes, the connecting plate frame is fixed above the plurality of elastic pull ropes, a vibration motor is fixed on the top surface of the return device, and the vibration motor is connected to the connecting plate frame.

[0014] Preferably, the particle assembly further comprises a particle board, which is rotatably mounted inside the dust hopper, a driving motor is fixed to the bottom of the dust hopper, and an output end of the driving motor penetrates into the dust hopper and is connected to the particle board.

[0015] Preferably, a sealing assembly is provided at the end of the return device away from the dust collecting hopper, and the sealing assembly includes an end sealing plate. The end of the end sealing plate is provided with a rotating shaft and is rotatably installed on the end of the return device through the rotating shaft. An arc-shaped spring piece is fixed between the end sealing plate and the return device.

[0016] Beneficial Effects

[0017] The utility model provides a device for improving the utilization rate of effective components of calcium-based desulfurization byproducts. Compared with the prior art, it has the following beneficial effects:

[0018] (1) The device for improving the utilization rate of effective components of calcium-based desulfurization by-products can, through the setting of a return device, enable the by-products to be recycled in the desulfurization process, fully reduce the content of effective components in the by-products, and also can put the by-products into the SDA semi-dry desulfurization process and the CFB circulating fluidized bed desulfurization process for use, thereby increasing the utilization rate and reducing the raw material consumption of the process.

[0019] (2) The device for improving the utilization rate of the effective components of calcium-based desulfurization by-products can ensure the circulation and desulfurization effect of the by-products through the cooperation of the blowing component and the crushing component. At the same time, it can also avoid the phenomenon of circulating ash agglomeration caused by the high ash conveying pressure of the circulation system, thereby improving the by-product conveying effect and the utilization rate of the effective components. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1This is the process flow chart of the CFB circulating fluidized bed desulfurization process of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the material return device of the utility model;

[0022] Figure 3 This is a schematic diagram of the cross-sectional structure of the material return device of the utility model;

[0023] Figure 4 For this utility model Figure 3 A schematic diagram of the enlarged structure of point A;

[0024] Figure 5 For this utility model Figure 3 A schematic diagram of the enlarged structure of point B in the middle;

[0025] Figure 6 This is the process flow chart of the SDA semi-dry desulfurization process of the utility model;

[0026] Figure 7 This is the process flow chart of wet desulfurization of the utility model.

[0027] In the figure: 1. By-product ash bin; 2. Suction and discharge tanker; 3. CFB desulfurization tower; 4. CFB bag filter; 5. Return device; 501. Dust hopper; 502. Blowing rack; 5021. Cavity; 5022. Exhaust port; 503. Blower; 504. Vibration motor; 505. End sealing plate; 5051. Rotating shaft; 5052. Arc spring; 5053. Sealing gasket; 506. Elastic draw cord; 5061. Connecting plate rack; 5062. Crushed material needle strip; 507, drive motor; 5071, particle board; 6, silo pump; 7, CFB desulfurization system ash silo; 8, SDA circulating ash silo; 9, SDA circulating pulping tank; 10, top tank; 11, atomizer; 12, SDA desulfurization tower; 13, SDA bag dust collector; 14, SDA ash silo; 15, wet limestone silo; 16, wet pulp supply tank; 17, wet desulfurization tower; 18, spray system; 19, circulation pump; 20, gypsum cyclone; 21, belt dewatering machine. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] See also Figure 1-Figure 7 The utility model provides three technical solutions, which specifically include the following embodiments:

[0030] Embodiment 1:

[0031] In the present utility model embodiment, reference Figure 1-Figure 5 , a device for improving the utilization rate of effective components of calcium-based desulfurization by-products, when used in a CFB circulating fluidized bed desulfurization process;

[0032] S1. First, the by-products in the by-product ash bin 1 are sent to the bottom of the CFB desulfurization tower 3 through the suction tank truck 2. The by-products follow the flue gas in the flue into the CFB desulfurization tower 3 to participate in the desulfurization reaction;

[0033] S2, the by-products after the reaction pass through the CFB bag filter 4 with the flue gas to separate the by-products from the flue gas, and the filtered by-products are returned to the CFB desulfurization tower 3 through the return device 5 for cyclic reaction;

[0034] S3. When the by-products circulate a certain number of times through the return device 5, they are discharged into the CFB desulfurization system ash storage 7 through the storage pump 6 for centralized treatment.

[0035] In the present utility model embodiment, specifically, refer to Figure 1 , Figure 2 A dust collecting hopper 501 is fixed at the end of the return device 5, and the dust collecting hopper 501 is fixed at the bottom of the CFB bag dust collector 4, and is used to collect the filtered by-products. The CFB bag dust collector 4 is built with a constant pressure pulse spraying system, which is used to blow the by-products filtered by the CFB bag dust collector 4 into the dust collecting hopper 501;

[0036] In the present utility model embodiment, reference Figure 3 Figure 4 A blowing assembly is provided at the end of the dust hopper 501. When the filtered by-products are blown into the dust hopper 501, the operation of the blowing assembly can blow the by-products blown into the dust hopper 501 back into the CFB desulfurization tower 3 for a circulation reaction;

[0037] In the present utility model embodiment, reference Figure 3-Figure 5 A crushing assembly is provided inside the return device 5 for crushing the agglomerated by-products. When the by-products are blown along the return device 5 and enter the CFB desulfurization tower 3, the agglomerated by-products can be crushed by the crushing assembly, resulting in a waste of raw materials and affecting the reaction effect.

[0038] In the present utility model embodiment, specifically, refer to Figure 2-Figure 5The blowing component includes a blowing rack 502, the blowing rack 502 has a cavity 5021 inside, and has a plurality of exhaust ports 5022 on the inside, a hair dryer 503 connected to the blowing rack 502 is fixed on the outside of the blowing rack 502, and the operation of the hair dryer 503 can transport external air to the blowing rack 502, and then discharge it from the plurality of exhaust ports 5022 to achieve the blowing of the by-products.

[0039] In the present utility model embodiment, specifically, refer to Figure 2-Figure 5 The crushing component includes a connecting plate frame 5061, a plurality of elastic pull ropes 506 are fixed inside the return device 5, and a plurality of crushing needle strips 5062 are fixed at the bottom of the elastic pull ropes 506, the connecting plate frame 5061 is fixed above the plurality of elastic pull ropes 506, a vibration motor 504 is fixed on the top surface of the return device 5, and the vibration motor 504 is connected to the connecting plate frame 5061. The operation of the vibration motor 504 can drive the connecting plate frame 5061 and the plurality of elastic pull ropes 506 to vibrate inside the return device 5. When the blown by-products pass through the plurality of crushing needle strips 5062, the agglomerated by-products can be crushed to avoid agglomeration while improving the subsequent reaction effect.

[0040] In the present utility model embodiment, specifically, refer to Figure 3 The crushing component also includes a crushing plate 5071, which is rotatably installed inside the dust hopper 501. A driving motor 507 is fixed to the bottom of the dust hopper 501. The output end of the driving motor 507 penetrates the dust hopper 501 and is connected to the crushing plate 5071. When the by-product falls into the dust hopper 501, the operation of the driving motor 507 can drive the crushing plate 5071 to operate, and the by-product is pre-crushed, which further ensures the crushing effect.

[0041] In the present utility model embodiment, specifically, refer to Figure 3 , Figure 5 A sealing assembly is provided at the end of the return device 5 away from the dust collecting hopper 501, and the sealing assembly includes an end sealing plate 505. A rotating shaft 5051 is provided at the end of the end sealing plate 505, and the end sealing plate 505 is rotatably installed on the end of the return device 5 through the rotating shaft 5051. An arc-shaped spring piece 5052 is fixed between the end sealing plate 505 and the return device 5. When the blowing assembly is running, the end sealing plate 505 can be forced to rotate along the rotating shaft 5051 to squeeze the arc-shaped spring piece 5052 so that the blown by-products can enter the CFB desulfurization tower 3 for a circulating reaction. When the blowing assembly stops, the end sealing plate 505 can be reset along the rotating shaft 5051 through the cooperation of the arc-shaped spring piece 5052 to seal the end of the return device 5 to prevent the flue gas inside the CFB desulfurization tower 3 from flowing back into the return device 5. A sealing gasket 5053 is fixed on the inner side of the end sealing plate 505.

[0042] Embodiment 2:

[0043] Based on the first embodiment, in the present utility model embodiment, reference Figure 6 , a device for improving the utilization rate of effective components of calcium-based desulfurization by-products, used in the SDA semi-dry desulfurization process, firstly transporting the by-products to the SDA semi-dry desulfurization system area through the suction and discharge tanker 2, transporting the by-products in the car to the SDA circulating ash bin 8, and following the circulating ash into the SDA circulating pulping tank 9 to prepare slurry;

[0044] The slurry prepared in the SDA circulating pulping tank 9 is transported to the top tank 10, enters the SDA desulfurization tower 12 through the atomizer 11, participates in the desulfurization reaction, and is filtered through the SDA bag filter 13. The by-products are sent back to the SDA circulating ash bin 8 for recycling. The by-products between the SDA bag filter 13 and the SDA circulating ash bin 8 are transported by a feeding pump.

[0045] After a certain number of cycles, the by-products are discharged into the system SDA ash storage 14 through a pump for centralized treatment;

[0046] Embodiment three:

[0047] Based on the first embodiment, in the present utility model embodiment, reference Figure 7 , a device for improving the utilization rate of effective components of calcium-based desulfurization by-products, used in a wet desulfurization process, firstly transporting the by-products to the wet desulfurization system area through a suction tanker 2, transporting the by-products in the vehicle to a wet limestone bin 15, and following the limestone in the wet limestone bin 15 into a wet slurry supply tank 16 to prepare slurry;

[0048] The slurry prepared by the wet slurry supply tank 16 is transported to the wet desulfurization tower 17 to participate in the desulfurization reaction; the slurry after the reaction falls to the bottom of the tower, and then the circulating pump 19 is used to transport the slurry after the reaction to the spray system 18 to re-enter the wet desulfurization tower 17 for reaction to achieve recycling;

[0049] After a certain number of cycles, the slurry after the reaction is transported to the gypsum cyclone 20 and the belt dehydrator 21 to generate gypsum for external transportation.

[0050] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0051] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A device for improving the utilization rate of effective components of calcium-based desulfurization by-products, comprising a CFB desulfurization tower (3), characterized in that: The outer side of the CFB desulfurization tower (3) is connected to a CFB bag dust collector (4) for separating by-products from flue gas. The CFB desulfurization tower (3) and the CFB bag dust collector (4) are connected to a return device (5) for returning the by-products after the reaction to the CFB desulfurization tower (3) for a circulation reaction. The outer side of the material return device (5) is connected to the CFB desulfurization system ash silo (7), and a silo pump (6) is installed between the material return device (5) and the CFB desulfurization system ash silo (7).

2. The device for improving the utilization rate of effective components of calcium-based desulfurization by-products according to claim 1, characterized in that: A dust collecting hopper (501) is fixed at the end of the return device (5), and the dust collecting hopper (501) is fixed at the bottom of the CFB bag filter (4) to collect the filtered by-products; The end of the dust collecting hopper (501) is provided with a blowing assembly for blowing the by-products falling into the dust collecting hopper (501) so that the by-products return to the CFB desulfurization tower (3) for a circulation reaction; The return device (5) is provided with a crushing component inside, which is used to crush the agglomerated by-products.

3. The device for improving the utilization rate of effective components of calcium-based desulfurization by-products according to claim 2, characterized in that: The blowing assembly comprises a blowing frame (502), wherein the blowing frame (502) has a cavity (5021) inside and a plurality of exhaust ports (5022) inside, and a hair dryer (503) connected to the blowing frame (502) is fixed on the outside of the blowing frame (502).

4. The device for improving the utilization rate of effective components of calcium-based desulfurization by-products according to claim 2, characterized in that: The crushing component includes a connecting plate frame (5061), a plurality of elastic pull ropes (506) are fixed inside the return device (5), and a plurality of crushing needle strips (5062) are fixed at the bottom of the elastic pull ropes (506), the connecting plate frame (5061) is fixed above the plurality of elastic pull ropes (506), a vibration motor (504) is fixed on the top surface of the return device (5), and the vibration motor (504) is connected to the connecting plate frame (5061).

5. The device for improving the utilization rate of effective components of calcium-based desulfurization by-products according to claim 4, characterized in that: The particle assembly further comprises a particle board (5071), wherein the particle board (5071) is rotatably mounted inside the dust hopper (501), a driving motor (507) is fixed at the bottom of the dust hopper (501), and an output end of the driving motor (507) penetrates into the dust hopper (501) and is connected to the particle board (5071).

6. The device for improving the utilization rate of effective components of calcium-based desulfurization by-products according to claim 2, characterized in that: The end of the return device (5) away from the dust collecting hopper (501) is provided with a sealing assembly, and the sealing assembly includes an end sealing plate (505). The end of the end sealing plate (505) is provided with a rotating shaft (5051) and is rotatably mounted on the end of the return device (5) through the rotating shaft (5051). An arc-shaped spring piece (5052) is fixed between the end sealing plate (505) and the return device (5).

Images