Boiler flue gas two-stage desulfurization structure

Abstract

The utility model relates to the technical field of boiler flue gas treatment, in particular to a boiler flue gas two-stage desulfurization structure which comprises a desulfurization box, a desulfurization mechanism is arranged at the upper end of the inner side of the desulfurization box, and a cleaning mechanism is arranged at the upper end, close to the desulfurization mechanism, of the desulfurization box. According to the flue gas desulfurization device, the desulfurization box, the rectifying plates, the circulating pump, the water outlet pipe, the water pumping pipe and the atomizing nozzles are matched for use, flue gas sequentially flows through the rectifying plates, and meanwhile, lime water sprayed by the atomizing nozzles reversely flows down along the rectifying plates to perform primary desulfurization treatment on the flue gas; the flue gas subjected to primary desulfurization is sprayed out from the right side of the rectifying plate at the topmost end and then is subjected to secondary desulfurization treatment by lime water sprayed out of the atomizing nozzles, and the rectifying plates are arranged in a staggered manner, so that the flowing distance of the flue gas in the desulfurization box is increased, the contact area of the flue gas and the lime water is increased, and the desulfurization effect is better; and only one circulating system is used, so that the purpose of saving energy can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler flue gas treatment, in particular to a two-stage desulfurization structure for boiler flue gas. Background Art

[0002] The purpose of boiler flue gas desulfurization is to reduce the sulfur dioxide content in the flue gas. Sulfur dioxide is a gas that is harmful to the environment and human health. When sulfur dioxide is discharged into the atmosphere, it easily reacts with water vapor, oxygen, etc. to generate sulfuric acid rain, which corrodes and pollutes the soil, water bodies and vegetation, and destroys the ecological balance. Desulfurization treatment can reduce the emission of sulfur dioxide in flue gas and reduce pollution to the environment.

[0003] At present, the existing two-stage desulfurization structure of boiler flue gas on the market usually connects the desulfurization tower to two circulation systems respectively, and sprays the rising flue gas in the desulfurization tower through the two circulation systems respectively to achieve the purpose of two-stage desulfurization. However, the configuration of two independent circulation systems will increase the energy consumption of the equipment, which is not conducive to energy conservation and environmental protection. Utility Model Content

[0004] The utility model aims to provide a two-stage desulfurization structure for boiler flue gas to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A two-stage desulfurization structure for boiler flue gas, comprising

[0007] A desulfurization box, wherein a desulfurization mechanism is disposed at the inner upper end of the desulfurization box, a cleaning mechanism is disposed at the upper end of the desulfurization box near the desulfurization mechanism, an exhaust port is opened at the top of the desulfurization box, and a demister is disposed below the exhaust port of the desulfurization box;

[0008] A water tank is arranged outside the right side of the bottom end of the desulfurization box, a connecting groove is opened between the water tank and the bottom end of the desulfurization box, and a circulation mechanism is arranged between the water tank and the desulfurization box;

[0009] An air intake pipe is connected to the lower middle portion of the left side of the desulfurization box, and a cooling mechanism is provided at one end of the air intake pipe located inside the desulfurization box.

[0010] Preferably, the desulfurization mechanism includes a rectifier plate, which is arranged at both ends of the inner middle part of the desulfurization box, and the rectifier plates on both sides are staggered. A plurality of atomizing nozzles are arranged side by side just above the rectifier plate near the top of the desulfurization box;

[0011] Preferably, the cleaning mechanism comprises an electric push rod, which is arranged on the left side of the desulfurization box, and the output shaft of the electric push rod is fixedly mounted with a baffle, which is movably connected to the upper end surface of the rectifier plate at the top;

[0012] Preferably, the circulation mechanism includes a circulation pump, which is fixedly installed on the right side of the top of the water tank, one end of the circulation pump is connected to the plurality of atomizing nozzles through a water outlet pipe, and the other end of the circulation pump is connected to the water tank through a water pumping pipe;

[0013] Preferably, the cooling mechanism comprises a serpentine tube, the serpentine tube is arranged at the lower part of the desulfurization box, one end of the serpentine tube is connected to the air intake pipe, and the other end of the serpentine tube is connected to a transverse tube, and the transverse tube is transversely arranged below the rectifier plate at the bottom end;

[0014] Preferably, a plurality of slots are arranged side by side at the top left side of the water tank, a fixing plate is clamped inside each of the slots, and a filter plate is fixedly installed in the middle of the fixing plate.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. A two-stage desulfurization structure for boiler flue gas is used in conjunction with a desulfurization box, a rectifier plate, a circulation pump, a water outlet pipe, a water suction pipe and an atomizing nozzle. The flue gas flows through a plurality of rectifier plates in sequence, and at the same time, the lime water sprayed by the atomizing nozzle flows countercurrently downward along the plurality of rectifier plates to desulfurize the flue gas once. After the flue gas is desulfurized once, it is sprayed out from the right side of the topmost rectifier plate, and then desulfurized twice by the lime water sprayed by the atomizing nozzles. Since the rectifier plates are arranged in a staggered manner, the flow distance of the flue gas inside the desulfurization box is increased, and the contact area with the lime water is increased, so the desulfurization effect is better, and only one circulation system is used, which can also achieve the purpose of energy saving.

[0017] 2. A two-stage desulfurization structure for boiler flue gas is used in conjunction with a rectifier plate, an electric push rod, a baffle, a circulating pump and an atomizing nozzle. After the flue gas treatment is completed, it is continuously sprayed through the atomizing nozzle, and then the electric push rod is controlled to start. After the electric push rod is started, the baffle is pushed forward so that the baffle blocks the outlet on the right side of the top rectifier plate. At this time, lime water accumulates on the upper end of the baffle until a certain amount of water is stored and the baffle is opened. At this time, a large amount of lime water enters from the outlet of the top rectifier plate and flushes the surfaces of several rectifier plates in turn, so that the dirt remaining thereon is effectively flushed, and the cleaning effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall main structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the overall cross-sectional structure of the utility model;

[0020] Figure 3 For the utility model Figure 2The enlarged schematic diagram at A in the middle;

[0021] Figure 4 For the utility model Figure 2 Enlarged schematic diagram of point B in the middle.

[0022] In the figure: 1. Desulfurization box; 2. Water tank; 3. Connecting groove; 4. Air inlet pipe; 5. Rectifier plate; 6. Atomizing nozzle; 7. Electric push rod; 8. Baffle; 9. Circulation pump; 10. Water outlet pipe; 11. Suction pipe; 12. Serpentine pipe; 13. Horizontal pipe; 14. Slot; 15. Fixed plate; 16. Filter plate; 17. Exhaust outlet; 18. Defogger. 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] like Figure 1-4 As shown, a technical solution provided by the utility model:

[0025] A two-stage desulfurization structure for boiler flue gas comprises a desulfurization box 1, a desulfurization mechanism is arranged at the inner upper end of the desulfurization box 1, the desulfurization mechanism comprises a rectifier plate 5, the rectifier plate 5 is arranged at both ends of the inner middle part of the desulfurization box 1, the rectifier plates 5 on both sides are arranged in a staggered manner, a plurality of atomizing nozzles 6 are arranged side by side just above the rectifier plate 5 near the top of the desulfurization box 1, a water tank 2 is arranged outside the right side of the bottom end of the desulfurization box 1, a connecting groove 3 is opened between the water tank 2 and the bottom end of the desulfurization box 1, a circulation mechanism is arranged between the water tank 2 and the desulfurization box 1, the circulation mechanism comprises a circulation pump 9, the circulation pump 9 is fixedly installed at the right side of the top end of the water tank 2, one end of the circulation pump 9 is connected to the plurality of atomizing nozzles 6 through a water outlet pipe 10, and the other end of the circulation pump 9 is connected to the water tank 2 through a water pumping pipe 11;

[0026] In this embodiment, the flue gas flows through several rectifier plates 5 in sequence, and at the same time, the lime water sprayed by the atomizing nozzle 6 flows countercurrently along the several rectifier plates 5 to desulfurize the flue gas once. After the flue gas after the primary desulfurization is sprayed out from the right side of the topmost rectifier plate 5, it is desulfurized for the second time by the lime water sprayed by several atomizing nozzles 6. Since the rectifier plates 5 are staggered, the flow distance of the flue gas inside the desulfurization box 1 is increased, and the contact area with the lime water is increased, so the desulfurization effect is better, and only one circulation system is used, which can also achieve the purpose of energy saving.

[0027] like Figure 2 and Figure 3As shown, a cleaning mechanism is provided at the upper end of the desulfurization box 1 near the desulfurization mechanism, and the cleaning mechanism includes an electric push rod 7, which is arranged on the left side of the desulfurization box 1. A baffle 8 is fixedly installed on the output shaft of the electric push rod 7, and the baffle 8 is movably connected to the upper end surface of the top rectifier plate 5. An exhaust port 17 is provided at the top of the desulfurization box 1, and a plurality of slots 14 are arranged side by side at the top left side of the water tank 2. A fixing plate 15 is clamped inside each of the slots 14, and a filter plate 16 is fixedly installed in the middle of the fixing plate 15, wherein the filter plate 16 can filter the desulfurized particulate matter in the exhaust gas;

[0028] In this embodiment, after the flue gas treatment is completed, it continues to be sprayed through the atomizing nozzle 6, and then the electric push rod 7 is controlled to start. After the electric push rod 7 is started, the baffle 8 is pushed forward so that the baffle 8 blocks the outlet on the right side of the top rectifier plate 5. At this time, lime water accumulates at the upper end of the baffle 8 until a certain amount of water is stored and the baffle 8 is opened. At this time, a large amount of lime water enters from the outlet of the top rectifier plate 5 and flushes the surfaces of several rectifier plates 5 in turn, so that the dirt remaining thereon is effectively flushed, and the cleaning effect is better.

[0029] like Figure 2 As shown, the lower middle part of the left side of the desulfurization box 1 is connected with an air intake pipe 4, and the air intake pipe 4 is located at one end of the desulfurization box 1 and is provided with a cooling mechanism, the cooling mechanism includes a serpentine pipe 12, the serpentine pipe 12 is arranged at the lower part of the desulfurization box 1, one end of the serpentine pipe 12 is connected with the air intake pipe 4, and the other end of the serpentine pipe 12 is connected with a transverse pipe 13, and the transverse pipe 13 is transversely arranged below the bottom rectifying plate 5, and the desulfurization box 1 is provided with a demister 18 below the exhaust port 17;

[0030] In this embodiment, the boiler flue gas enters the serpentine pipe 12 from the air inlet pipe 4, and then flows along the serpentine pipe 12 and is cooled by the water at the bottom of the desulfurization box 1. The incoming flue gas is first cooled to reduce the generation of water vapor, and then cooperated with the demister 18 at the top to effectively dehumidify the exhaust gas.

[0031] Working principle: During operation, the boiler flue gas enters the serpentine tube 12 from the air inlet pipe 4, then flows along the serpentine tube 12 and is cooled by the water at the bottom of the desulfurization box 1, and then is ejected through the horizontal pipe 13. At this time, the flue gas flows through several rectifier plates 5 in sequence, and at the same time, the lime water sprayed by the atomizing nozzle 6 flows countercurrently along several rectifier plates 5 to desulfurize the flue gas once. After the flue gas after the primary desulfurization is ejected from the right side of the top rectifier plate 5, it is desulfurized twice by the lime water sprayed by several atomizing nozzles 6. Due to the staggered arrangement of the rectifier plates 5, the flow distance of the flue gas inside the desulfurization box 1 is increased, and it is in contact with the lime water. The contact area between ash and water increases, so the desulfurization effect is better, and only one circulation system is used, which can also achieve the purpose of energy saving. After the flue gas treatment is completed, it continues to be sprayed through the atomizing nozzle 6, and then the electric push rod 7 is controlled to start. After the electric push rod 7 is started, the baffle 8 is pushed forward so that the baffle 8 blocks the outlet on the right side of the top rectifier plate 5. At this time, lime water accumulates at the upper end of the baffle 8 until a certain amount of water is stored and the baffle 8 is opened. At this time, a large amount of lime water enters from the outlet of the top rectifier plate 5 and flushes the surfaces of several rectifier plates 5 in turn, so that the dirt remaining thereon is effectively flushed, and the cleaning effect is better.

[0032] 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 descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A two-stage desulfurization structure for boiler flue gas, characterized in that: include A desulfurization box (1), wherein a desulfurization mechanism is disposed at the inner upper end of the desulfurization box (1), a cleaning mechanism is disposed at the upper end of the desulfurization box (1) close to the desulfurization mechanism, an exhaust port (17) is disposed at the top of the desulfurization box (1), and a demister (18) is disposed below the exhaust port (17) of the desulfurization box (1); A water tank (2) is arranged outside the right side of the bottom end of the desulfurization box (1), a connecting groove (3) is provided between the bottom ends of the water tank (2) and the desulfurization box (1), and a circulation mechanism is arranged between the water tank (2) and the desulfurization box (1); An air intake pipe (4) is connected to the lower middle portion of the left side of the desulfurization box (1), and a cooling mechanism is provided at one end of the air intake pipe (4) located inside the desulfurization box (1).

2. A two-stage boiler flue gas desulfurization structure according to claim 1, characterized in that: The desulfurization mechanism comprises a rectifying plate (5), wherein the rectifying plate (5) is arranged at both ends of the inner middle part of the desulfurization box (1), and the rectifying plates (5) on both sides are arranged in a staggered manner. A plurality of atomizing nozzles (6) are arranged side by side just above the rectifying plate (5) near the top of the desulfurization box (1).

3. A two-stage desulfurization structure for boiler flue gas according to claim 2, characterized in that: The cleaning mechanism comprises an electric push rod (7), which is arranged on the left side of the desulfurization box (1). The output shaft of the electric push rod (7) is fixedly installed with a baffle (8), and the baffle (8) is movably connected to the upper end surface of the rectifier plate (5) at the top.

4. A two-stage boiler flue gas desulfurization structure according to claim 2, characterized in that: The circulation mechanism comprises a circulation pump (9), which is fixedly installed on the right side of the top end of the water tank (2). One end of the circulation pump (9) is connected to a plurality of atomizing nozzles (6) through a water outlet pipe (10), and the other end of the circulation pump (9) is connected to the water tank (2) through a water suction pipe (11).

5. A two-stage desulfurization structure for boiler flue gas according to claim 2, characterized in that: The cooling mechanism comprises a serpentine pipe (12), wherein the serpentine pipe (12) is arranged at the lower part of the desulfurization box (1), one end of the serpentine pipe (12) is connected to the intake pipe (4), and the other end of the serpentine pipe (12) is connected to a transverse pipe (13), and the transverse pipe (13) is arranged transversely below the rectifier plate (5) at the bottom end.

6. A two-stage desulfurization structure for boiler flue gas according to claim 1, characterized in that: A plurality of slots (14) are arranged side by side at the top left side of the water tank (2), a fixing plate (15) is clamped inside each of the slots (14), and a filter plate (16) is fixedly mounted in the middle of the fixing plate (15).

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