Semi-dry desulfurization device for boiler flue gas

Abstract

The utility model relates to the technical field of flue gas treatment, in particular to a boiler flue gas semi-dry desulfurization device which comprises a reaction tower and a dust remover, an inlet flue is arranged on the side wall of the bottom of the reaction tower, an outlet flue is arranged on the side wall of the top of the reaction tower, and an atomizer is mounted at the top of the reaction tower. The input end of the atomizer is externally connected with a booster pump through a liquid guide pipe, the outlet flue is communicated with a dust remover through a smoke guide pipe, an induced draft fan is mounted on the smoke guide pipe, and a flow guide plate is mounted in the reaction tower. The flue gas is sprayed to the flow guide plate, the flow guide plate adopts the design of a bent channel, and a flow guide groove is formed, so that the flue gas is buffered when leading to the outlet flue, the flue gas flow is optimized, the mixing degree of the desulfurizing agent and the flue gas is improved, and the desulfurization reaction is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas treatment, in particular to a boiler flue gas semi-dry desulfurization device. Background Art

[0002] A boiler is an energy conversion device. The energy input to the boiler includes chemical energy and electrical energy in the fuel. The boiler outputs steam, high-temperature water or organic heat carrier with a certain amount of thermal energy. The boiler will produce flue gas when in use. The flue gas needs to be desulfurized during the emission process. The existing flue gas desulfurization methods are divided into dry desulfurization devices, wet desulfurization devices and semi-dry desulfurization devices.

[0003] For this purpose, Chinese patent No. 202222041617.0 discloses a semi-dry flue gas desulfurization tower. The desulfurization tower is provided with two tangential air inlets. After the flue gas enters, the airflow direction changes from linear motion to spiral rise along the side wall of the cylinder. Compared with the existing radial vertical flue gas intake method, it avoids the problem of a large amount of dirt concentrated on the side wall of the cylinder caused by the flue gas directly impacting the side wall of the cylinder when entering the desulfurization tower.

[0004] Although the application meets the needs of users to a certain extent, there are still certain defects in actual use. The specific problems are as follows: since it is not convenient to block the flue gas inside the desulfurization tower, the contact time between the flue gas and the spray liquid is short, which affects the desulfurization efficiency in the flue gas. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies of the prior art, the utility model provides a boiler flue gas semi-dry desulfurization device.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a semi-dry desulfurization device for boiler flue gas of the utility model comprises a reaction tower and a dust collector, an inlet flue is provided on the bottom side wall of the reaction tower, an outlet flue is provided on the top side wall of the reaction tower, an atomizer is installed on the top of the reaction tower, the input end of the atomizer is connected to an external pressure pump through a liquid guide tube, the outlet flue is connected to the dust collector through a smoke guide pipe, and an induced draft fan is installed on the smoke guide pipe, a guide plate is installed in the reaction tower, the guide plates are arranged in several layers in the reaction tower, and smoke guide channels are provided between adjacent guide plates, and the guide plates are slidably installed in the reaction tower.

[0009] Preferably, the guide plate is provided with a bend, and the heights of the bends of adjacent smoke guide channels are in a layer-by-layer increasing structure.

[0010] Further preferably, a water accumulation layer is provided at the bottom of the reaction tower, and a water accumulation tank is slidably installed in the water accumulation layer.

[0011] Again preferably, an installation layer is provided between the water accumulation layer and the reaction tower, and a plurality of fixing rods are arranged on the installation layer, and gaps are provided between adjacent fixing rods to communicate with the water accumulation layer, and fixing grooves are provided on the fixing rods, and the bottom of the guide plate is slidably connected to the fixing grooves through a limiting rod, an opening is provided on the front side of the reaction tower, the guide plate is adapted to the opening, and a sealing frame is provided at the end of the guide plate, the side of the sealing frame is wrapped with a sealing rubber pad, and the sealing frame is fitted with the opening through the sealing rubber pad.

[0012] Preferably, the water storage tank is provided with a drain outlet, and a drain pipe is installed on the drain outlet.

[0013] Further preferably, a slide groove is provided at the bottom of the water accumulation layer, and the bottom of the water accumulation tank is slidably connected to the slide groove via a slide rod.

[0014] Preferably again, the fixing groove and the limiting rod are T-shaped structures, the sliding rod and the sliding groove are rectangular structures, and the fitting ends of the sliding rod and the sliding groove are arc-shaped structures.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the utility model provides a boiler flue gas semi-dry desulfurization device, which has the following beneficial effects:

[0017] The utility model atomizer is connected to a medicine box containing absorbent by cooperating with a pressure pump, and the absorbent is atomized into droplets by the atomizer and sprayed onto a guide plate. The guide plate adopts a bent channel design and is provided with a guide groove, so that the flue gas is buffered when it passes to the outlet flue, optimizes the flow of flue gas, improves the mixing degree of desulfurizer and flue gas, and strengthens the desulfurization reaction. The guide plate and the water storage tank in the utility model are assembled with the reaction tower by a sliding installation structure, and the overall structural design is simple and clear, and each component is easy to disassemble and repair, thereby reducing the operating cost and maintenance difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the reaction tower structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the assembly structure of multiple guide plates of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the dust collector of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the water storage tank of the utility model;

[0022] In the figure: 1. reaction tower; 2. dust collector; 3. atomizer; 4. liquid guide tube; 5. inlet flue; 6. outlet flue; 7. guide plate; 8. opening; 9. fixing rod; 10. fixing groove; 11. limit rod; 12. sealing frame; 13. water accumulation layer; 14. slideway; 15. induced draft fan; 16. water accumulation tank. DETAILED DESCRIPTION

[0023] 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.

[0024] See also Figure 1-4 The utility model discloses a semi-dry desulfurization device for boiler flue gas, comprising a reaction tower 1 and a dust collector 2. An inlet flue 5 is provided on the bottom side wall of the reaction tower 1, and an outlet flue 6 is provided on the top side wall of the reaction tower 1. An atomizer 3 is installed on the top of the reaction tower 1. The input end of the atomizer 3 is externally connected to a pressure pump through a liquid guide pipe 4. The outlet flue 6 is connected to the dust collector 2 through a smoke guide pipe, and an induced draft fan 15 is installed on the smoke guide pipe. A guide plate 7 is installed in the reaction tower 1. The guide plates 7 are arranged in several layers in the reaction tower 1, and smoke guide channels are provided between adjacent guide plates 7. The guide plates 7 are slidably installed in the reaction tower 1.

[0025] In the preferred embodiment of the above-mentioned boiler flue gas semi-dry desulfurization device, a bend is provided on the guide plate 7, and the height of the bends of adjacent smoke guide channels is a layered increasing structure. The design of the above-mentioned guide plate 7 can optimize the flue gas flow, improve the mixing degree of the desulfurizer and the flue gas, and strengthen the desulfurization reaction. At the same time, the multi-level guide plate 7 structure can further improve the desulfurization efficiency, and a guide groove can also be provided on the guide plate 7 to ensure the guide effect on the flue gas.

[0026] In the preferred embodiment of the above-mentioned boiler flue gas semi-dry desulfurization device, a water accumulation layer 13 is provided at the bottom of the reaction tower 1, a water accumulation box 16 is slidably installed in the water accumulation layer 13, a drain port is provided on the water accumulation box 16, and a drainage pipe is installed on the drain port, a chute 14 is provided at the bottom of the water accumulation layer 13, and the bottom of the water accumulation box 16 is slidably connected to the chute 14 through a slide rod. The design of the water accumulation layer 13 can effectively collect and utilize the desulfurization slurry, and the water accumulation box 16 can discharge the accumulated water in time, ensuring the recycling of the slurry in the reaction tower 1. The design of the slide rod and the chute 14 enhances the stability of the installation of the water accumulation box 16, and also facilitates the extraction of the water accumulation box 16 from the water accumulation layer 13.

[0027] In the preferred embodiment of the above-mentioned boiler flue gas semi-dry desulfurization device, a mounting layer is provided between the water accumulation layer 13 and the reaction tower 1, and a plurality of fixing rods 9 are arranged on the mounting layer, and gaps are provided between adjacent fixing rods 9 to communicate with the water accumulation layer 13, and a fixing groove 10 is provided on the fixing rod 9, and the bottom of the guide plate 7 is slidably connected to the fixing groove 10 through a limiting rod 11, and an opening 8 is provided on the front side of the reaction tower 1, and the guide plate 7 is adapted to the opening 8, and a sealing frame 12 is provided at the end of the guide plate 7, and the side of the sealing frame 12 is wrapped with a sealing rubber pad, and the sealing frame 12 is fitted with the opening 8 through the sealing rubber pad, and the design of the sealing frame 12 and the opening 8 is used to splice the fixing groove 10 on the fixing rod 9 and the limiting rod 11 in combination with the sealing frame 12 and the opening 8 to seal and fit, the guide plate 7 can be conveniently installed and disassembled when it needs to be cleaned after long-term use, and the sealing frame 12 can ensure the sealing between the guide plate 7 and the reaction tower 1 to prevent flue gas leakage.

[0028] In the preferred embodiment of the above-mentioned boiler flue gas semi-dry desulfurization device, the fixed groove 10 and the limiting rod 11 are of T-shaped structure, the sliding rod and the slide groove 14 are of rectangular structure, and the fitting ends of the sliding rod and the slide groove 14 are of arc structure. According to the design of the above-mentioned structure, the stability of the installation of the guide plate 7 and the water storage tank 16 is ensured.

[0029] The boiler flue gas semi-dry desulfurization device can efficiently perform flue gas desulfurization and dust removal through the combination of the reaction tower 1 and the dust collector 2. When the flue gas is desulfurized, the reaction tower 1 is connected to the flue gas input pipeline through the inlet flue duct 5 to introduce the flue gas. At this time, the atomizer 3 is connected to the medicine box containing the absorbent through the cooperation with the booster pump. The absorbent is atomized into droplets by the atomizer 3 and sprayed onto the guide plate 7. The guide plate 7 adopts a bent channel design and is provided with a guide groove, so that the flue gas is buffered when it passes to the outlet flue 6, which is advantageous. The flue gas flow is improved, the mixing degree of the desulfurizer and the flue gas is improved, and the desulfurization reaction is strengthened. The desulfurization slurry produced in the desulfurization process is guided to the water layer 13 by the guide plate 7, and the flue gas is sucked into the dust collector 2 under the action of the induced draft fan 15 for dust removal and filtration before being discharged. The dust collector 2 in the utility model can use a conventional cyclone dust collector 2 to separate the gas and solid particles in the flue gas after desulfurization. The overall structural design of the utility model is simple and clear, and each component is easy to disassemble and repair, which reduces the operating cost and maintenance difficulty.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A boiler flue gas semi-dry desulfurization device, characterized in that: The invention comprises a reaction tower (1) and a dust collector (2), wherein an inlet flue (5) is provided on the bottom side wall of the reaction tower (1), an outlet flue (6) is provided on the top side wall of the reaction tower (1), an atomizer (3) is installed on the top of the reaction tower (1), the input end of the atomizer (3) is externally connected to a pressure pump via a liquid guide tube (4), the outlet flue (6) is connected to the dust collector (2) via a smoke guide tube, and an induced draft fan (15) is installed on the smoke guide tube, a guide plate (7) is installed in the reaction tower (1), the guide plates (7) are arranged in a plurality of layers in the reaction tower (1), and smoke guide channels are provided between adjacent guide plates (7), and the guide plates (7) are slidably installed in the reaction tower (1).

2. A boiler flue gas semi-dry desulfurization device according to claim 1, characterized in that: The guide plate (7) is provided with a bending portion, and the heights of the bending portions of adjacent smoke guide channels are in a layer-by-layer increasing structure.

3. A boiler flue gas semi-dry desulfurization device according to claim 2, characterized in that: A water accumulation layer (13) is provided at the bottom of the reaction tower (1), and a water accumulation box (16) is slidably installed in the water accumulation layer (13).

4. A boiler flue gas semi-dry desulfurization device according to claim 3, characterized in that: An installation layer is provided between the water accumulation layer (13) and the reaction tower (1), the installation layer is arranged with a plurality of fixing rods (9), and gaps are provided between adjacent fixing rods (9) to communicate with the water accumulation layer (13), the fixing rods (9) are provided with fixing grooves (10), the bottom of the guide plate (7) is slidably connected to the fixing grooves (10) via a limiting rod (11), an opening (8) is provided on the front side of the reaction tower (1), the guide plate (7) is adapted to the opening (8), and a sealing frame (12) is provided at the end of the guide plate (7), the side of the sealing frame (12) is wrapped with a sealing rubber pad, and the sealing frame (12) is fitted with the opening (8) via the sealing rubber pad.

5. A boiler flue gas semi-dry desulfurization device according to claim 4, characterized in that: The water storage box (16) is provided with a drainage outlet, and a drainage pipe is installed on the drainage outlet.

6. A boiler flue gas semi-dry desulfurization device according to claim 5, characterized in that: A slide groove (14) is provided at the bottom of the water accumulation layer (13), and the bottom of the water accumulation box (16) is slidably connected to the slide groove (14) via a sliding rod.

7. A boiler flue gas semi-dry desulfurization device according to claim 6, characterized in that: The fixing groove (10) and the limiting rod (11) are T-shaped structures, the sliding rod and the sliding groove (14) are rectangular structures, and the fitting ends of the sliding rod and the sliding groove (14) are arc-shaped structures.

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