Fluidized bed boiler desulfurization device

Abstract

The utility model provides a fluidized bed boiler desulfurization device, which relates to the technical field of desulfurization, and comprises a cylinder, an air pump and a U-shaped delivery pipe, the left lower part of the cylinder is provided with an outer fixing plate, the outer fixing plate is provided with the air pump, the air pump is connected with an air delivery pipe, the right part of the air delivery pipe extends into the inner lower part of the cylinder, and the U-shaped delivery pipe is connected with the air pump. A U-shaped conveying pipe is installed in the middle of the left side face of the barrel, an air outlet bin is arranged at the top of the barrel, an exhaust pipeline is connected to the upper end of the air outlet bin, a flow guide plate is arranged in the barrel and is of an arc-shaped flow guide plate structure made of a glass flake material, and glass flakes are arranged on the inner side wall of the barrel; and a dehumidifier is arranged at the top in the cylinder body. According to the flue gas desulfurization device, flue gas can be conveniently subjected to desulfurization agent washing use, then sufficient combustion is performed, flow guide, adsorption and dehumidification are performed after combustion, circulating desulfurization treatment can be performed, flue gas desulfurization treatment is cleaner and more thorough, and emission is safe and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of desulfurization, and particularly relates to a desulfurization device for a fluidized bed boiler. Background Technique

[0002] During the operation of a power plant fluidized bed boiler, due to the influence of sulfur elements in the coal, SO2 will be generated during the combustion process. Sulfur dioxide discharged into the atmosphere can form acid rain when it meets water, acidify the water quality, and cause changes in the water ecosystem; acid rain will harm forests, damage the soil, and reduce the yield of crops; acid rain will also corrode buildings. Sulfur dioxide will be generated during the operation of the fluidized bed boiler. Due to the harm of sulfur dioxide, the flue gas must be treated before being discharged.

[0003] In the prior art (publication number CN113522001A), the specification of a flue gas adsorption fluidized bed desulfurization reaction device mentions that "it includes a tower body, a slurry pool is provided at the bottom of the tower body, a flow equalizing component installed in the tower body and located above the slurry pool, a plurality of spraying components installed in the tower body and distributed along the Y direction, the spraying components are located above the flow equalizing component, and a demister installed in the tower body and located above the spraying components", but the flue gas in the prior art is not treated with desulfurizing agent, resulting in incomplete desulfurization treatment, and some sulfur dioxide may remain, and the discharge is not safe and reliable. Content of the Utility Model

[0004] To overcome the defects existing in the prior art, a desulfurization device for a fluidized bed boiler is provided to solve the problems that the flue gas in the prior art is not treated with desulfurizing agent, resulting in incomplete desulfurization treatment, and some sulfur dioxide may remain, and the discharge is not safe and reliable.

[0005] To achieve the above object, a desulfurization device for a fluidized bed boiler is provided, which includes a cylinder body, an air pump and a U-shaped conveying pipe. An outer fixing plate is arranged at the lower left part of the cylinder body, and an air pump is installed on the outer fixing plate. An air conveying pipe is connected to the air pump, and the right part of the air conveying pipe extends into the lower part of the cylinder body. A U-shaped conveying pipe is installed in the middle of the left side surface of the cylinder body, and an air outlet bin is arranged at the top of the cylinder body, and an exhaust pipe is connected to the upper end of the air outlet bin.

[0006] Furthermore, a dust collecting tank is arranged at the inner bottom of the cylinder body, the right part of the air conveying pipe is located above the dust collecting tank, and multiple groups of air nozzles are arranged on the air conveying pipe.

[0007] Furthermore, a dust cleaning port is arranged at the lower part of the front side surface of the cylinder body, and a manhole is arranged in the middle of the front side surface of the cylinder body.

[0008] Further, a flow guiding plate is arranged inside the cylinder body. The flow guiding plate adopts an arc-shaped flow guiding plate structure made of glass flakes. Glass flakes are arranged on the inner side wall of the cylinder body. A dehumidifier is arranged at the top inside the cylinder body, and a turbo fan is arranged above the dehumidifier.

[0009] Further, a first sulfur absorption layer, a second sulfur absorption layer and a third sulfur absorption layer are sequentially arranged from bottom to top in the upper part of the cylinder body. The first sulfur absorption layer adopts honeycomb molecular sieve, the second sulfur absorption layer adopts an activated carbon adsorption layer, and the third sulfur absorption layer adopts a clinoptilolite layer.

[0010] Further, an inlet is arranged at the left end of the U-shaped conveying pipe, an outlet is arranged at the right end of the U-shaped conveying pipe. An inner air guiding pipe is arranged inside the left part of the U-shaped conveying pipe. The lower end of the inner air guiding pipe extends into the desulfurizer in the middle of the U-shaped conveying pipe. A feeding pipe is arranged on the upper side of the middle part of the U-shaped conveying pipe. A sleeve frame is sleeved on the upper part of the feeding pipe. A hopper is arranged at the upper end of the feeding pipe. A sewage discharge pipe orifice is arranged on the lower side of the middle part of the U-shaped conveying pipe.

[0011] Further, a reflux pipe is arranged on the lower left side of the exhaust pipe. A first electromagnetic control valve is installed on the reflux pipe. The other end of the reflux pipe leads to the inside of the cylinder body. A second electromagnetic control valve is installed on the lower part of the exhaust pipe.

[0012] The beneficial effects of the utility model are as follows:

[0013] 1. The utility model uses an air pump to pump air into the lower part of the cylinder body, and the air is ejected through the air nozzles on the air conveying pipe. Then, the burner installed on the lower right side of the cylinder body is used to reburn the flue gas, making its combustion more complete and helping to remove harmful components therein.

[0014] 2. In the utility model, the arrangements of the flow guiding plate, the first sulfur absorption layer, the second sulfur absorption layer and the third sulfur absorption layer facilitate the diversion of gas, the adsorption of sulfur monoxide and sulfur dioxide, and then the dehumidification and transportation of the gas, making the flue gas desulfurization cleaner and more thorough.

[0015] 3. The arrangement of the U-shaped conveying pipe in the utility model facilitates the first transportation of the flue gas into the desulfurizer for desulfurization treatment, and also removes most of the sulfur dioxide in the oxygen. The desulfurizer is conveyed into the U-shaped conveying pipe through the sleeve frame, and sewage discharge treatment is carried out through the sewage discharge pipe orifice, which is more convenient and practical.

[0016] 4. The arrangement of the exhaust pipe in the utility model facilitates the return transportation of the desulfurized gas to the lower part of the cylinder body to start the desulfurization treatment again. The cyclic desulfurization is cleaner and more thorough, and then the emission is more environmentally friendly. Description of the Drawings

[0017] Figure 1 It is a front view schematic diagram of an embodiment of the utility model;

[0018] Figure 2 is a schematic cross-sectional view of an embodiment of the present utility model;

[0019] Figure 3 is a schematic structural view of an air delivery pipe of an embodiment of the present utility model;

[0020] Figure 4 is a schematic structural view of a U-shaped delivery pipe of an embodiment of the present utility model.

[0021] In the figure: 1, cylinder body; 10, ash collecting tank; 11, outer fixing plate; 12, guide plate; 13, glass flake; 14, first sulfur absorption layer; 15, second sulfur absorption layer; 16, third sulfur absorption layer; 17, dehumidifier; 18, turbine fan; 19, air outlet chamber; 100, ash cleaning port; 101, manhole; 2, air pump; 20, air delivery pipe; 21, air nozzle; 3, U-shaped delivery pipe; 30, inlet; 31, inner air guide pipe; 32, sleeve; 33, hopper; 34, material conveying pipe; 35, outlet; 36, desulfurizer; 37, sewage discharge pipe orifice; 4, exhaust pipe; 40, return pipe; 41, first electromagnetic control valve; 42, second electromagnetic control valve. Specific embodiments

[0022] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer, the following further describes the present utility model in detail with reference to the accompanying drawings and embodiments. The specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model. Specific details such as specific system structures and technologies are proposed to more thoroughly understand the embodiments of the present utility model. The described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. However, those skilled in the art should clearly understand that the present utility model can also be implemented in other embodiments without these specific details. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of protection of the present disclosure.

[0023] The following describes the specific embodiments of the present utility model in detail with reference to the accompanying drawings.

[0024] Figure 1 is a front view schematic of an embodiment of the present utility model, Figure 2 is a schematic cross-sectional view of an embodiment of the present utility model, Figure 3 is a schematic structural view of an air delivery pipe of an embodiment of the present utility model and Figure 4 is a schematic structural view of a U-shaped delivery pipe of an embodiment of the present utility model.

[0025] Refer to Figures 1 to 4As shown in the figure, the utility model provides a desulfurization device for a fluidized bed boiler, which includes a cylinder body 1, an air pump 2 and a U-shaped conveying pipe 3. An outer fixing plate 11 is arranged at the lower left part of the cylinder body 1, and an air pump 2 is installed on the outer fixing plate 11. An air conveying pipe 20 is connected to the air pump 2, and the right part of the air conveying pipe 20 extends into the lower part of the cylinder body 1. A U-shaped conveying pipe 3 is installed in the middle of the left side surface of the cylinder body 1, and an air outlet bin 19 is arranged at the top of the cylinder body 1, and an exhaust pipe 4 is connected to the upper end of the air outlet bin 19.

[0026] In this embodiment, an ash collection tank 10 is arranged at the inner bottom of the cylinder body 1, the right part of the air conveying pipe 20 is located above the ash collection tank 10, and a plurality of air nozzles 21 are arranged on the air conveying pipe 20.

[0027] As a preferred implementation method, the utility model uses the air pump 2 to pump air into the lower part of the cylinder body 1, and the air is ejected through the air nozzles 21 on the air conveying pipe 20, and then the burner installed at the lower right part of the cylinder body 1 is used to re-burn the flue gas, making its combustion more complete and helping to remove harmful components therein.

[0028] In this embodiment, an ash cleaning port 100 is arranged at the lower part of the front side surface of the cylinder body 1, and a manhole 101 is arranged in the middle of the front side surface of the cylinder body 1; a flow guiding plate 12 is arranged inside the cylinder body 1, the flow guiding plate 12 adopts an arc-shaped flow guiding plate structure made of glass flakes, and glass flakes 13 are arranged on the inner side wall of the cylinder body 1, and a dehumidifier 17 is arranged at the top inside the cylinder body 1, and a turbine fan 18 is arranged above the dehumidifier 17; a first sulfur absorption layer 14, a second sulfur absorption layer 15 and a third sulfur absorption layer 16 are sequentially arranged from bottom to top in the upper part of the cylinder body 1, the first sulfur absorption layer 14 adopts honeycomb molecular sieve, the second sulfur absorption layer 15 adopts an activated carbon adsorption layer, and the third sulfur absorption layer 16 adopts a clinoptilolite layer.

[0029] As a preferred implementation method, the arrangements of the flow guiding plate 12, the first sulfur absorption layer 14, the second sulfur absorption layer 15 and the third sulfur absorption layer 16 in the utility model are convenient for guiding the gas, adsorbing sulfur monoxide and sulfur dioxide, then dehumidifying it and conveying it out, making the desulfurization of the flue gas cleaner and more thorough.

[0030] In this embodiment, an inlet 30 is arranged at the left end of the U-shaped conveying pipe 3, an outlet 35 is arranged at the right end of the U-shaped conveying pipe 3, an inner air guiding pipe 31 is arranged inside the left part of the U-shaped conveying pipe 3, the lower end of the inner air guiding pipe 31 extends into the desulfurizing agent 36 in the middle of the U-shaped conveying pipe 3, a feeding pipe 34 is arranged on the upper side of the middle part of the U-shaped conveying pipe 3, a sleeve frame 32 is sleeved on the upper part of the feeding pipe 34, a hopper 33 is arranged at the upper end of the feeding pipe 34, and a sewage discharge pipe orifice 37 is arranged on the lower side of the middle part of the U-shaped conveying pipe 3.

[0031] As a preferred embodiment, the U-shaped conveying pipe 3 in the present utility model is arranged to conveniently convey the flue gas to the desulfurizing agent 36 for desulfurization treatment first, and most of the sulfur dioxide in the oxygen is also removed. The desulfurizing agent is conveyed into the U-shaped conveying pipe 3 through the sleeve 32, and sewage treatment is carried out through the sewage discharge pipe orifice 37, which is more convenient and practical.

[0032] In this embodiment, a reflux pipe 40 is arranged on the lower left side of the exhaust pipe 4. A first electromagnetic control valve 41 is installed on the reflux pipe 40, and the other end of the reflux pipe 40 leads to the cylinder body 1, and a second electromagnetic control valve 42 is installed on the lower part of the exhaust pipe 4.

[0033] As a preferred embodiment, the exhaust pipe 4 in the present utility model is arranged to conveniently convey the desulfurized gas back to the lower part of the cylinder body 1 for re-desulfurization treatment. The cyclic desulfurization is cleaner and more thorough, and the subsequent emission is more environmentally friendly.

[0034] The present utility model can effectively solve the problem in the prior art that the flue gas is not treated with a desulfurizing agent, resulting in incomplete desulfurization treatment, possible residual sulfur dioxide, and unsafe and unreliable emission. The present utility model is convenient for washing the flue gas with a desulfurizing agent, then fully burning it, guiding, adsorbing and dehumidifying it after combustion, and can carry out cyclic re-desulfurization treatment, making the desulfurization treatment of the flue gas cleaner and more thorough, and the emission safe and reliable.

[0035] The above embodiments are used to explain the present utility model, rather than limiting the utility model. Any modification and change made to the present utility model within the spirit of the present utility model and the scope of the claimed rights should be included in the protection scope of the present utility model.

Claims

1. A fluidized bed boiler desulfurization device, characterized in that: The invention comprises a cylinder (1), an air pump (2) and a U-shaped delivery pipe (3), wherein an outer fixing plate (11) is arranged at the lower left part of the cylinder (1), and the air pump (2) is mounted on the outer fixing plate (11), an air delivery pipe (20) is connected to the air pump (2), and the right part of the air delivery pipe (20) extends into the lower inner part of the cylinder (1), a U-shaped delivery pipe (3) is mounted at the middle part of the left side surface of the cylinder (1), an air outlet bin (19) is arranged at the top of the cylinder (1), and the upper end of the air outlet bin (19) is connected to an exhaust pipe (4).

2. A fluidized bed boiler desulfurization device according to claim 1, characterized in that: An ash collecting trough (10) is provided at the inner bottom of the cylinder (1), the right portion of the air conveying pipe (20) is located above the ash collecting trough (10), and a plurality of groups of air nozzles (21) are provided on the air conveying pipe (20).

3. A fluidized bed boiler desulfurization device according to claim 1, characterized in that: A dust cleaning port (100) is provided at the lower portion of the front side surface of the cylinder (1), and a manhole (101) is provided at the middle portion of the front side surface of the cylinder (1).

4. A fluidized bed boiler desulfurization device according to claim 1, characterized in that: A guide plate (12) is arranged inside the cylinder (1), the guide plate (12) adopts an arc-shaped guide plate structure made of glass flake material, and glass flakes (13) are arranged on the inner side wall of the cylinder (1), and a dehumidifier (17) is arranged at the top of the cylinder (1), and a turbo fan (18) is arranged on the upper side of the dehumidifier (17).

5. The fluidized bed boiler desulfurization device according to claim 1, characterized in that: The upper inner portion of the cylinder (1) is provided with a first sulfur absorption layer (14), a second sulfur absorption layer (15) and a third sulfur absorption layer (16) in sequence from bottom to top, and the first sulfur absorption layer (14) is made of a honeycomb molecular sieve, the second sulfur absorption layer (15) is made of an activated carbon adsorption layer, and the third sulfur absorption layer (16) is made of a clinoptilolite layer.

6. A fluidized bed boiler desulfurization device according to claim 1, characterized in that: The left end of the U-shaped conveying pipe (3) is provided with an inlet (30), the right end of the U-shaped conveying pipe (3) is provided with an outlet (35), and an inner air guide pipe (31) is provided in the left part of the U-shaped conveying pipe (3), the lower end of the inner air guide pipe (31) extends into the desulfurizing agent (36) in the middle part of the U-shaped conveying pipe (3), and a material conveying pipe (34) is provided on the upper side of the middle part of the U-shaped conveying pipe (3), a sleeve frame (32) is sleeved on the upper part of the material conveying pipe (34), a hopper (33) is provided at the upper end of the material conveying pipe (34), and a sewage discharge pipe opening (37) is provided on the lower side of the middle part of the U-shaped conveying pipe (3).

7. A fluidized bed boiler desulfurization device according to claim 1, characterized in that: A return pipe (40) is provided on the left side of the lower part of the exhaust pipe (4), a first electromagnetic control valve (41) is installed on the return pipe (40), the other end of the return pipe (40) leads to the inside of the cylinder (1), and a second electromagnetic control valve (42) is installed at the lower part of the exhaust pipe (4).

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