A flue gas desulfurization device for coal boiler

Abstract

The utility model relates to the technical field of desulfurization equipment, and specifically discloses a flue gas desulfurization device for a coal boiler, comprising a tower body, a sprayer and a spray pump, the tower body comprising a spray bin, a demisting bin and a cleaning bin arranged in sequence from bottom to top, a flue gas inlet is arranged at the lower portion of the spray bin, a sprayer is arranged at the upper portion of the spray bin, a movable frame is connected to the bottom plate of the demisting bin through a plurality of elastic members, a collision mechanism capable of colliding with the movable frame is arranged in the demisting bin below the movable frame, a plurality of support rods are transversely mounted on the top of the movable frame through a plurality of pairs of legs, a plurality of baffles are jointly sleeved on the plurality of support rods, a plurality of baffles jointly form a demister, and the upper portion of the demister is matched within the lower portion of the cleaning bin, a flue gas outlet is opened at the top of the cleaning bin, the utility model can effectively prevent the demister from being blocked and reduce the difficulty of cleaning the demister.

Description

Technical Field

[0001] The utility model relates to the technical field of desulfurization devices, in particular to a flue gas desulfurization device for a coal boiler. Background Art

[0002] The flue gas generated by the coal boiler needs to be sent to the desulfurization tower for desulfurization before it can be discharged. In the desulfurization tower, the spray equipment sprays limestone slurry, which absorbs sulfur dioxide in the flue gas to achieve the desulfurization effect. After flue gas desulfurization, it still contains a large amount of droplets and particulate matter, so it is necessary to install a demister on the upper part of the desulfurization tower to remove droplets and particulate matter in the flue gas. Large desulfurization towers generally use baffle demisters, which have the advantages of durability and good demisting effect, but they will be blocked after long-term use. At present, spraying is used to clean the demister, but because the baffles of the baffle demister are S-shaped, C-shaped or W-shaped, the effect of spraying cleaning alone is not good. It often takes a long time to clean once, and the cleaning efficiency is low. Utility Model Content

[0003] In order to solve the problems mentioned in the background technology, the purpose of the utility model is to provide a flue gas desulfurization device for a coal boiler.

[0004] In order to achieve the above objectives, the technical solution of the utility model is:

[0005] A flue gas desulfurization device for a coal boiler comprises a tower body, a sprayer and a spray pump, the tower body comprises a spray bin, a demisting bin and a cleaning bin arranged in sequence from bottom to top, a flue gas inlet is provided in the middle of the spray bin, a sprayer is provided in the upper part of the spray bin, the sprayer is connected with the bottom of the spray bin through the spray pump, the size of the demisting bin is larger than the spray bin and the cleaning bin, a movable frame is connected to the bottom plate of the demisting bin through a plurality of elastic parts, a collision mechanism capable of colliding with the movable frame is provided in the demisting bin below the movable frame, a plurality of support rods are transversely installed on the top of the movable frame through a plurality of pairs of legs, a plurality of baffles are jointly sleeved on the plurality of support rods, the plurality of baffles jointly form a demister and the upper part of the demister is matched within the lower part of the cleaning bin, a sprayer is provided in the upper part of the cleaning bin, and a flue gas outlet is opened at the top of the cleaning bin.

[0006] Furthermore, the collision mechanism includes a crossbeam, an impact rod, a connecting rod, a rotating shaft and a motor. A crossbeam is installed transversely below the movable frame in the defogger bin, and a plurality of impact rods are longitudinally penetrated in the crossbeam. A rotating shaft is installed transversely and rotatably below the crossbeam in the defogger bin, and a connecting rod is hinged between each impact rod and the outer wall of the rotating shaft. The motor is installed outside the defogger bin to drive the rotating shaft to reciprocate. An impact beam is connected to the bottom of the movable frame corresponding to the plurality of impact rods, and the impact rods can collide with the impact beam.

[0007] The beneficial effect of the utility model is that the collision mechanism can be used to periodically impact the movable frame, thereby causing the defogger to vibrate, shaking off the particles adhering to the baffle plate, avoiding the accumulation of particles on the surface of the baffle plate, greatly reducing the risk of clogging of the defogger, and reducing the difficulty of cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0009] Figure 2 This is a schematic diagram of the structure of the demister in the embodiment of the utility model;

[0010] Figure 3 It is a schematic diagram of the structure of the collision mechanism and the defogger in the embodiment of the utility model.

[0011] Explanation of the accompanying drawing numbers: 1. Spray chamber, 11. Smoke inlet, 2. Demisting chamber, 21. Crossbeam, 3. Cleaning chamber, 31. Smoke outlet, 4. Sprayer, 41. Spray pump, 5. Elastic member, 6. Movable frame, 61. Support foot, 62. Support rod, 63. Impact beam, 7. Baffle, 8. Sprayer, 9. Impact rod, 10. Connecting rod, 110. Rotating shaft, 120. Motor. DETAILED DESCRIPTION

[0012] 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 of the utility model, all other embodiments obtained by ordinary technicians in this field belong to the protection scope of the utility model.

[0013] like Figure 1-Figure 3As shown, a flue gas desulfurization device for a coal boiler comprises a tower body, a sprayer 4 and a spray pump 41. The tower body comprises a spray bin 1, a demisting bin 2 and a cleaning bin 3 arranged in sequence from bottom to top. A flue gas inlet 11 is provided in the middle of the spray bin 1. A sprayer 4 is provided in the upper part of the spray bin 1. The sprayer 4 is connected to the bottom of the spray bin 1 through the spray pump 41. The size of the demisting bin 2 is larger than the spray bin 1 and the cleaning bin 3. A rectangular movable frame 6 is connected to the bottom plate of the demisting bin 2 through four elastic members 5. Preferably, the elastic member 5 is a spring. The four springs are respectively arranged at the four corners of the movable frame 6. A collision mechanism capable of colliding with the movable frame 6 is provided in the demisting bin 2 below the movable frame 6. Preferably, the collision mechanism comprises a crossbeam 21, a collision rod 9, a connecting rod 10, a rotating shaft 110 and a motor 120. A crossbeam 21 is horizontally installed below the movable frame 6 in the demisting bin 2 Five impact rods 9 are longitudinally penetrated in the crossbeam 21, and a rotating shaft 110 is installed in the defogger 2 below the crossbeam 21 in a transverse rotation manner. A connecting rod 10 is hinged between each impact rod 9 and the outer wall of the rotating shaft 110. The motor 120 is installed on the outside of the defogger 2 to drive the rotating shaft 110 to rotate reciprocatingly. The bottom of the movable frame 6 is connected with an impact beam 63 corresponding to the five impact rods 9, and the impact rod 9 can collide with the impact beam 63. Two support rods 62 are installed horizontally on the top of the movable frame 6 through two pairs. A plurality of baffles 7 are jointly sleeved on the two support rods 62, and the baffles 7 are welded to the support rods 62. The plurality of baffles 7 jointly form a rectangular defogger, and the upper part of the defogger is matched with the lower part of the cleaning bin 3. A sprayer 8 is provided on the upper part of the cleaning bin 3. The sprayer 8 is used to spray the defogger, and a smoke outlet 31 is opened at the top of the cleaning bin 3.

[0014] In actual use, limestone slurry is loaded at the bottom of the spray bin 1, and the flue gas enters the spray bin 1 through the flue gas inlet 11. The spray pump 41 pumps the limestone slurry at the bottom of the spray bin 1 into the sprayer 4 to spray the flue gas, thereby absorbing the sulfur dioxide in the flue gas. The flue gas passes through the gaps between adjacent baffles 7 after spraying. The multiple baffles 7 form a demister, which can block the droplets and particulate matter in the flue gas. The motor 120 can be used to drive the rotating shaft 110 to rotate reciprocatingly, so that the impact rod 9 periodically collides with the impact beam 63, thereby causing the demister to vibrate and shake off the particulate matter adhered to the baffle 7 to avoid the accumulation of particulate matter on the surface of the baffle 7, greatly reducing the risk of clogging of the demister and reducing the difficulty of cleaning. After working for a long time, the sprayer 8 can also be opened to spray the demister.

[0015] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. All modifications, equivalent substitutions, improvements, etc. within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A flue gas desulfurization device for a coal boiler, comprising a tower body, a sprayer (4) and a spray pump (41), characterized in that: The tower body comprises a spray bin (1), a demisting bin (2) and a cleaning bin (3) which are arranged in sequence from bottom to top. A smoke inlet (11) is provided in the middle of the spray bin (1). A sprayer (4) is provided in the upper part of the spray bin (1). The sprayer (4) is connected to the bottom of the spray bin (1) through a spray pump (41). The size of the demisting bin (2) is larger than that of the spray bin (1) and the cleaning bin (3). A movable frame (6) is connected to the bottom plate of the demisting bin (2) through a plurality of elastic members (5). The demisting bin (2) A collision mechanism capable of colliding with the movable frame (6) is provided below the movable frame (6); a plurality of support rods (62) are transversely mounted on the top of the movable frame (6) via a plurality of pairs of legs (61); a plurality of baffles (7) are collectively sleeved on the plurality of support rods (62); the plurality of baffles (7) collectively form a demister and the upper portion of the demister is fitted into the lower portion of the cleaning chamber (3); a sprayer (8) is provided in the upper portion of the cleaning chamber (3); and a smoke outlet (31) is provided at the top of the cleaning chamber (3).

2. A flue gas desulfurization device for a coal boiler according to claim 1, characterized in that: The collision mechanism comprises a crossbeam (21), an impact rod (9), a connecting rod (10), a rotating shaft (110) and a motor (120); a crossbeam (21) is transversely installed below the movable frame (6) in the demisting chamber (2); a plurality of impact rods (9) are longitudinally penetrated in the crossbeam (21); a rotating shaft (110) is transversely installed below the crossbeam (21) in the demisting chamber (2); a connecting rod (10) is hinged between each impact rod (9) and the outer wall of the rotating shaft (110); the motor (120) is installed outside the demisting chamber (2) for driving the rotating shaft (110) to reciprocate; a collision beam (63) is connected to the bottom of the movable frame (6) corresponding to the plurality of impact rods (9); and the impact rod (9) can collide with the impact beam (63).

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