Furnace deacidification device of circulating fluidized bed

Abstract

The utility model discloses an in-furnace deacidification device of a circulating fluidized bed, which relates to the technical field of circulating fluidized bed deacidification, and comprises a bottom plate, a fluidized bed main body and a deacidification tank body, a breather pipe is arranged at the upper position of the left side of the fluidized bed main body, and a first air pump is arranged in the breather pipe; the fluidized bed main body is communicated with the interior of the deacidification tank body through a breather pipe, a mounting plate is fixedly connected to the upper position of the inner side wall of the deacidification tank body, and the breather pipe penetrates through the upper surface of the mounting plate. According to the scheme, acid gas in the fluidized bed main body is pumped out through the first air pump and brought into the deacidification tank body, then an absorbent in the material storage box is brought into the spraying disc through the water pump and the anti-corrosion hose, then the atomization spray head is opened, and the absorbent is sprayed into the deacidification tank body; meanwhile, the spraying disc is driven to move up and down through the motor, the rotating shaft, the spiral sliding groove and the sliding block, so that the absorbent is in full contact with the acid gas, and the deacidification effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circulating fluidized bed deacidification, in particular to a circulating fluidized bed furnace deacidification device. Background Art

[0002] Circulating fluidized bed is an advanced combustion technology that can achieve efficient combustion at lower temperatures and reduce the emission of harmful gases. Its basic principle is to mix solid fuel and gas in a high-speed gas-solid two-phase flow state to form a fluid-like state, thereby achieving diffusion combustion.

[0003] Circulating fluidized bed boilers usually use solid fuels such as coal and wood or liquid fuels such as oil and natural gas as fuel. These fuels contain a certain amount of sulfur. During the combustion of coal, sulfur reacts with oxygen at high temperature to form oxides, such as SO2, SO3, etc. These oxides react with water molecules in the air to form sulfuric acid, thereby forming acidic gases. The combustion process of circulating fluidized bed boilers is a complex chemical reaction process, which includes multiple reaction links such as coal oxidation, carbon gasification, and combustion. In this process, nitrogen and oxygen will also participate in the reaction to form nitrogen oxides (NOx). These nitrogen oxides will interact with other gases in the atmospheric environment to form substances such as nitric acid and nitrates, further aggravating the generation of acidic gases. At present, the market generally uses an absorbent to mix with the acidic gas in the furnace to form an acidic liquid, which is discharged from the fluidized bed boiler to achieve the purpose of deacidification. The absorbent generally uses alkali solution, which includes sodium hydroxide, calcium hydroxide, etc.

[0004] The existing furnace deacidification device has poor deacidification effect when in use because the absorbent is not fully mixed with the acid gas in the furnace when sprayed. This invention provides a circulating fluidized bed furnace deacidification device to solve the above problem. Utility Model Content

[0005] In order to solve the above technical problems, a circulating fluidized bed in-furnace deacidification device is provided. This technical solution solves the problem that the existing in-furnace deacidification device proposed in the above background technology has poor deacidification effect due to insufficient mixing of the absorbent with the acid gas in the furnace when spraying.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is: a circulating fluidized bed furnace deacidification device, comprising a bottom plate, a fluidized bed body and a deacidification tank body, a ventilation pipe is provided at the upper left side of the fluidized bed body, a first air pump is installed inside the ventilation pipe, the fluidized bed body is connected with the interior of the deacidification tank body through the ventilation pipe, a mounting plate is fixedly connected at the upper position of the inner side wall of the deacidification tank body, the ventilation pipe passes through the upper surface of the mounting plate, a storage box is provided at the left position of the upper surface of the mounting plate, and the top of the storage box is provided with A feed pipe, the top of which passes through the inner wall of the deacidification tank body, the feed pipe is connected to the interior of the storage box, a water pump is fixedly installed at the left position on the bottom surface of the mounting plate, the output end of the water pump is connected to a corrosion-resistant hose, the corrosion-resistant hose is connected to the interior of the storage box through the water pump, the end of the corrosion-resistant hose away from the water pump is connected to a spray plate, the upper surface of the spray plate is fixedly connected with limiting plates at left and right symmetrical positions, a motor is installed at the center position of the upper surface of the mounting plate, and fixed blocks are fixedly connected to both sides of the interior of the deacidification tank body.

[0007] Optionally, support rods are provided at the four corners of the bottom surface of the bottom plate, a fluidized bed body is provided at the right position of the upper surface of the bottom plate, and a deacidification tank body is provided at the left position inside the bottom plate.

[0008] Optionally, a through hole is provided at a central position on the upper surface of the spray disc, a sliding block is provided inside the through hole, and a plurality of atomizing nozzles are provided on the outer surface of the spray disc.

[0009] Optionally, the atomizing nozzle is communicated with the interior of a spray plate, a feed hole is provided on the upper surface of the spray plate, and the interior of the spray plate is communicated with an anti-corrosion hose through the feed hole.

[0010] Optionally, the output end of the motor passes through the upper surface of the mounting plate and is fixedly connected to the rotating shaft. A spiral groove is provided on the surface of the rotating shaft. The interior of the spiral groove is slidably connected to the slider. The rotating shaft is slidably connected to the interior of the through hole. Limit blocks are provided on the upper and lower sides of the surface of the rotating shaft.

[0011] Optionally, a limiting groove is provided on one side of the two fixed blocks close to each other, the interior of the limiting groove is slidably connected to the limiting plate, and a drain outlet is provided at the bottom of the deacidification tank body, and a switch valve is provided inside the drain outlet.

[0012] Optionally, an exhaust pipe is provided on the left side of the deacidification tank body, the exhaust pipe is connected to the interior of the deacidification tank body, a second air pump is installed inside the exhaust pipe, and an activated carbon filter plate is provided inside the exhaust pipe.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] In this solution, the acid gas in the fluidized bed body is extracted by the first air pump and brought to the deacidification tank body, and then the absorbent in the storage box is brought to the spray plate by the water pump and the anti-corrosion hose. Then, the atomizing nozzle is opened to spray the absorbent into the deacidification tank body. At the same time, the spray plate is driven up and down by the motor, the rotating shaft, the spiral slide and the slider to make the absorbent fully contact with the acid gas, thereby improving the deacidification effect. Some waste gas generated in this process is purified and filtered by the activated carbon filter plate and then discharged out of the tank body through the second air pump and the exhaust pipe, thereby reducing environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0016] Figure 2 It is a cross-sectional view of the utility model;

[0017] Figure 3 It is a three-dimensional structural schematic diagram of the spraying assembly in the utility model;

[0018] Figure 4 for Figure 2 Schematic diagram of the local enlarged structure at point A in the middle.

[0019] Description of reference numerals:

[0020] 1. Bottom plate; 11. Support rod;

[0021] 2. Fluidized bed body; 21. Ventilation pipe; 22. First air pump;

[0022] 3. Deacidification tank; 31. Mounting plate; 32. Storage box; 33. Feed pipe; 34. Water pump; 35. Corrosion-resistant hose; 36. Spraying plate; 37. Through hole; 38. Sliding block; 39. Atomizing nozzle; 310. Feeding hole; 311. Limiting plate; 312. Motor; 313. Rotating shaft; 314. Spiral slide; 315. Limiting block; 316. Fixed block; 317. Limiting groove; 318. Drain port; 319. Exhaust pipe; 320. Second air pump. DETAILED DESCRIPTION

[0023] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0024] Reference Figure 1-2As shown, an in-furnace deacidification device of a circulating fluidized bed comprises a base plate 1, a fluidized bed body 2 and a deacidification tank body 3, support rods 11 are provided at the four corners of the bottom surface of the base plate 1, the fluidized bed body 2 is provided at the right position of the upper surface of the base plate 1, the deacidification tank body 3 is provided at the left position inside the base plate 1, a ventilation pipe 21 is provided at the upper position on the left side of the fluidized bed body 2, a first air pump 22 is installed inside the ventilation pipe 21, the fluidized bed body 2 is connected with the interior of the deacidification tank body 3 through the ventilation pipe 21, a mounting plate 31 is fixedly connected to the upper position of the inner side wall of the deacidification tank body 3, the ventilation pipe 21 passes through the upper surface of the mounting plate 31, the acid gas in the fluidized bed body 2 is extracted by the first air pump 22, and is brought into the deacidification tank body 3 through the ventilation pipe 21, so as to improve the deacidification efficiency.

[0025] Optional, such as Figure 2 and Figure 3 As shown, a storage box 32 is arranged at the left position of the upper surface of the mounting plate 31, and a feed pipe 33 is arranged on the top of the storage box 32. The top end of the feed pipe 33 passes through the inner wall of the deacidification tank body 3, and the feed pipe 33 is communicated with the interior of the storage box 32. The absorbent is input into the storage box 32 through the feed pipe 33. A water pump 34 is fixedly installed at the left position of the bottom surface of the mounting plate 31. The output end of the water pump 34 is connected to an anti-corrosion hose 35. The anti-corrosion hose 35 is communicated with the interior of the storage box 32 through the water pump 34. The end of the anti-corrosion hose 35 away from the water pump 34 is connected to a spray plate 36, and a through hole 37 is provided at the center of the upper surface of the spray plate 36. A slider 38 is provided inside the through hole 37, and a plurality of atomizing nozzles 39 are provided on the outer surface of the spray disc 36. The atomizing nozzle 39 is connected to the inside of the spray disc 36. A feed hole 310 is provided on the upper surface of the spray disc 36. The inside of the spray disc 36 is connected to the anti-corrosion hose 35 through the feed hole 310. Limiting plates 311 are fixedly connected at left and right symmetrical positions on the upper surface of the spray disc 36. The water pump 34 is turned on, and the absorbent in the storage box 32 is brought to the spray disc 36 through the anti-corrosion hose 35. Then the atomizing nozzle 39 is turned on to spray the absorbent into the deacidification tank body 3, so that it contacts and mixes with the acidic gas to form an acidic liquid.

[0026] Further, such as Figure 2-4As shown, a motor 312 is installed at the center position of the upper surface of the mounting plate 31, and the output end of the motor 312 passes through the upper surface of the mounting plate 31 and is fixedly connected to the rotating shaft 313. A spiral groove 314 is provided on the surface of the rotating shaft 313, and the interior of the spiral groove 314 is slidably connected to the slider 38, and the rotating shaft 313 is slidably connected to the interior of the through hole 37. Limiting blocks 315 are provided on the upper and lower sides of the surface of the rotating shaft 313, and fixed blocks 316 are fixedly connected to the interior of the deacidification tank 3 on both sides. A limiting groove 317 is provided on the side where the two fixing blocks 316 are close to each other, and the interior of the limiting groove 317 is slidably connected to the limiting plate 311. The spray disc 36 is limited by the limiting plate 311 and the limiting groove 317 to prevent the spray disc 36 from shaking when it moves up and down. A sewage outlet 318 is provided at the bottom, and a switch valve is provided inside the sewage outlet 318. An exhaust pipe 319 is provided on the left side of the deacidification tank body 3. The exhaust pipe 319 is connected to the inside of the deacidification tank body 3. A second air pump 320 is installed inside the exhaust pipe 319. An activated carbon filter plate is provided inside the exhaust pipe 319. The motor 312 is started, and its output end drives the rotating shaft 313 to rotate, and then the spray plate 36 is moved up and down through the spiral slide groove 314 and the slider 38, so that the absorbent is fully in contact with the acid gas, thereby improving the deacidification effect. Some waste gas generated in this process is purified and filtered by the activated carbon filter plate and then discharged from the tank body through the second air pump 320 and the exhaust pipe 319 to reduce environmental pollution. The switch valve is opened to discharge the acidic liquid through the sewage outlet 318, thereby achieving the purpose of deacidification.

[0027] The working principle of the utility model is as follows: first, the absorbent is fed into the storage box 32 through the feed pipe 33, and then the first air pump 22 is turned on to extract the acidic gas in the fluidized bed body 2 and bring it to the deacidification tank body 3 through the ventilation pipe 21, and then the water pump 34 is turned on to bring the absorbent in the storage box 32 to the spray plate 36 through the corrosion-resistant hose 35, and then the atomizing nozzle 39 is turned on to spray the absorbent into the deacidification tank body 3, and at the same time, the motor 312 is started to drive the rotating shaft 313 to rotate, and then the spray plate 36 is moved up and down through the spiral slide 314 and the slider 38, so that the absorbent is fully in contact with the acidic gas, thereby improving the deacidification effect. Some waste gas generated in this process is purified and filtered by the activated carbon filter plate and then discharged out of the tank body through the second air pump 320 and the exhaust pipe 319, and finally the switch valve is opened to discharge the acidic liquid through the sewage outlet 318, thereby achieving the purpose of deacidification.

[0028] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the specification only describe the principles of the utility model. The utility model may be subject to various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A circulating fluidized bed furnace deacidification device, characterized in that: The invention comprises a bottom plate (1), a fluidized bed body (2) and a deacidification tank body (3); a ventilation pipe (21) is provided at the upper left side of the fluidized bed body (2); a first air pump (22) is installed inside the ventilation pipe (21); the fluidized bed body (2) is connected to the inside of the deacidification tank body (3) through the ventilation pipe (21); a mounting plate (31) is fixedly connected to the upper position of the inner side wall of the deacidification tank body (3); the ventilation pipe (21) passes through the upper surface of the mounting plate (31); a storage box (32) is provided at the left position of the upper surface of the mounting plate (31); a material delivery pipe (33) is provided at the top of the storage box (32); the top of the material delivery pipe (33) passes through the inner wall of the deacidification tank body (3); The material delivery pipe (33) is connected to the interior of the material storage box (32); a water pump (34) is fixedly installed at the left position of the bottom surface of the mounting plate (31); the output end of the water pump (34) is connected to an anti-corrosion hose (35); the anti-corrosion hose (35) is connected to the interior of the material storage box (32) through the water pump (34); the end of the anti-corrosion hose (35) away from the water pump (34) is connected to a spraying disc (36); the upper surface of the spraying disc (36) is fixedly connected to limiting plates (311) at left and right symmetrical positions; a motor (312) is installed at the center position of the upper surface of the mounting plate (31); and fixed blocks (316) are fixedly connected to both sides of the interior of the deacidification tank body (3).

2. The circulating fluidized bed furnace deacidification device according to claim 1, characterized in that: Support rods (11) are provided at the four corners of the bottom surface of the bottom plate (1), a fluidized bed body (2) is provided at the right position of the upper surface of the bottom plate (1), and a deacidification tank body (3) is provided at the left position inside the bottom plate (1).

3. The circulating fluidized bed furnace deacidification device according to claim 1, characterized in that: A through hole (37) is provided at the center of the upper surface of the spray disc (36), a sliding block (38) is provided inside the through hole (37), and a plurality of atomizing nozzles (39) are provided on the outer surface of the spray disc (36).

4. The circulating fluidized bed furnace deacidification device according to claim 3, characterized in that: The atomizing nozzle (39) is connected to the interior of the spraying disc (36), a material inlet hole (310) is provided on the upper surface of the spraying disc (36), and the interior of the spraying disc (36) is connected to the anti-corrosion hose (35) through the material inlet hole (310).

5. The circulating fluidized bed furnace deacidification device according to claim 1, characterized in that: The output end of the motor (312) passes through the upper surface of the mounting plate (31) and is fixedly connected to the rotating shaft (313); a spiral groove (314) is provided on the surface of the rotating shaft (313); the interior of the spiral groove (314) is slidably connected to the slider (38); the rotating shaft (313) is slidably connected to the interior of the through hole (37); and limit blocks (315) are provided on both upper and lower sides of the surface of the rotating shaft (313).

6. The circulating fluidized bed furnace deacidification device according to claim 1, characterized in that: A limiting groove (317) is provided on one side of the two fixed blocks (316) close to each other, and the interior of the limiting groove (317) is slidably connected to the limiting plate (311). A sewage outlet (318) is provided at the bottom of the deacidification tank body (3), and a switch valve is provided inside the sewage outlet (318).

7. The circulating fluidized bed furnace deacidification device according to claim 1, characterized in that: An exhaust pipe (319) is provided on the left side of the deacidification tank body (3), the exhaust pipe (319) is connected to the interior of the deacidification tank body (3), a second air pump (320) is installed inside the exhaust pipe (319), and an activated carbon filter plate is provided inside the exhaust pipe (319).

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