Flue gas desulfurization structure for thermal power plant

Abstract

The invention discloses a flue gas desulfurization structure for a thermal power plant, and relates to the technical field of flue gas desulfurization, the flue gas desulfurization structure comprises a desulfurization tower, a flue gas inlet pipe is fixed at the front end of the desulfurization tower, a flue gas discharge pipe is fixed at the upper end of the desulfurization tower, a support is fixed on the outer wall of the desulfurization tower, and support legs are fixed at corners of the bottom end of the support; and a demister is arranged in the desulfurization tower. Through cooperation of the driving part and the spraying part, the first booster pump of the spraying part extracts desulfurization reaction liquid from the liquid storage tank, the desulfurization reaction liquid is distributed to the rotary spraying pipe through the adapter pipe, and full-coverage spraying is achieved through the atomization nozzles; a motor of the driving part drives a bevel gear I to drive a bevel gear ring I and an inner ring spraying pipe to slowly rotate and to be matched with a barrier plate to synchronously rotate, so that the spraying coverage area is enlarged, reaction products attached to the inner wall of the tower are scraped in real time, and blockage is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of flue gas desulfurization, and specifically to a flue gas desulfurization structure for thermal power plants. Background Art

[0002] In the field of flue gas desulfurization in thermal power plants, the limestone-gypsum wet desulfurization process is the mainstream technology. It absorbs sulfur dioxide (SO2) in flue gas through limestone (CaCO3) slurry, and finally realizes the removal of sulfur pollutants through processes such as oxidation and crystallization. Although this process has advantages such as a wide range of absorbent sources and high desulfurization efficiency,

[0003] However, most existing spraying devices adopt a fixed nozzle design. The distribution of the reaction liquid (such as limestone slurry) is restricted by the nozzle position, which is prone to form local overspray or blind spots, resulting in fluctuations in desulfurization efficiency. At the same time, the calcium sulfite / calcium sulfate solids generated by the reaction are easily adhered to the inner wall of the tower, affecting the normal flow of flue gas, and requiring regular shutdown for manual cleaning, increasing the operation and maintenance costs.

[0004] Based on this, a flue gas desulfurization structure for thermal power plants is now provided, which can eliminate the drawbacks of the existing structure. Summary of the Invention

[0005] The purpose of the present invention is to provide a flue gas desulfurization structure for thermal power plants to solve the problems in the background art that most existing spraying devices adopt a fixed nozzle design, which has a spraying blind spot, and the fixed products produced after flue gas desulfurization are easily adhered to the inner wall of the tower, affecting the normal flow of flue gas and requiring regular manual cleaning.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A flue gas desulfurization structure for thermal power plants includes a desulfurization tower. An inlet flue is fixed at the front end of the desulfurization tower, an exhaust flue is fixed at the upper end of the desulfurization tower, and a support is fixed on the outer wall of the desulfurization tower. Legs are fixed at the corners of the bottom end of the support. A demister is arranged inside the desulfurization tower;

[0008] A spraying unit for desulfurizing flue gas and a cleaning unit for cleaning the demister are further arranged inside the desulfurization tower. The spraying unit is located above the inlet flue and below the demister, and the cleaning unit is located above the demister.

[0009] Preferably, the spraying unit includes a driving member and a spraying member. The spraying member includes a first booster pump installed at the upper end of the support. The water inlet end of the first booster pump is connected to the reaction liquid storage tank through a first water inlet pipe. The water outlet end of the first booster pump is connected to a transfer pipe through a first connecting pipe, and the first connecting pipe is rotatably connected to the transfer pipe. The other end of the transfer pipe is connected with a plurality of spray pipes. A plurality of atomizing nozzles are fixed at the lower ends of the plurality of spray pipes, and the plurality of spray pipes are fixedly connected to the inner wall of the first bevel gear ring. The first bevel gear ring is connected to the driving member.

[0010] Preferably, the driving member includes a motor installed at the upper end of the support. The output end of the motor is fixed with a main wheel. The main wheel is connected to the cleaning unit through a belt. The other end of the main wheel extends into the desulfurization tower and is fixedly connected with a first bevel gear. The first bevel gear meshes with the first bevel gear ring.

[0011] Preferably, a plurality of blocking plates are fixedly arranged at equal angles at the bottom end of the first bevel gear ring. The blocking plates are attached to the inner wall of the desulfurization tower.

[0012] Preferably, the cleaning unit includes a linkage member and a cleaning member. The linkage member includes a driven wheel rotatably installed on the outer wall of the desulfurization tower. The driven wheel is connected to the main wheel through a belt. One end of the driven wheel extends into the desulfurization tower and is fixedly connected with a second bevel gear. The second bevel gear meshes with a second bevel gear ring. The second bevel gear ring is rotatably installed inside the desulfurization tower. An eliminator is fixed to the inner ring of the second bevel gear ring. A cleaning member is arranged above the eliminator.

[0013] Preferably, a reciprocating screw rod is fixedly connected to the end of the second bevel gear away from the driven wheel. A guide rod is arranged above the reciprocating screw rod. Both ends of the guide rod are fixed to the inner wall of the desulfurization tower, and the reciprocating screw rod and the guide rod are connected to the cleaning member.

[0014] Preferably, the cleaning member includes a second booster pump installed on the outer wall of the desulfurization tower. The water inlet end of the second booster pump is connected to the cleaning water tank through a second water inlet pipe. The water outlet end of the second booster pump is connected to a moving block through a telescopic connecting pipe. Three nozzles are installed at the lower end of the moving block. The moving block is threadedly connected to the reciprocating screw rod and is slidably connected to the guide rod.

[0015] Preferably, the three nozzles are fixedly arranged at equal distances at the lower end of the moving block.

[0016] Preferably, an anti-slip layer is arranged at the bottom end of the leg.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. In the present invention, through the cooperation of the driving member and the spraying member, the booster pump I of the spraying member extracts the desulfurization reaction liquid from the liquid storage tank, distributes it to the rotating spray pipe through the transfer pipe, and realizes full-coverage spraying through the atomizing nozzles; the motor of the driving member drives the bevel gear I, drives the bevel gear ring I and the inner spray pipe to rotate slowly, and rotates synchronously with the baffle plate, which not only expands the spraying coverage area, but also scrapes the reaction products attached to the inner wall of the tower in real time to prevent blockage.

[0019] 2. In the present invention, the motor drives the follower wheels through the belt at the same time. The follower wheels drive the bevel gear II, and drive the bevel gear ring II and the inner demister to rotate slowly, so that each area is evenly cleaned; the bevel gear II synchronously drives the reciprocating screw rod, drives the moving block to move linearly back and forth along the guide rod, and the spray head at its lower end sprays water mist evenly, covering the entire surface of the demister, thereby cleaning the surface of the demister. Brief Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of the present invention.

[0021] Figure 2 It is a schematic internal structural diagram of the present invention.

[0022] Figure 3 It is a schematic structural diagram of the spraying unit of the present invention.

[0023] Figure 4 It is a schematic structural diagram of the cleaning unit of the present invention.

[0024] Annotation of Reference Numerals in the Drawings: 1, desulfurization tower; 11, flue gas inlet pipe; 12, flue gas outlet pipe; 13, demister; 2, support; 21, support leg; 3, spraying unit; 31, driving member; 311, motor; 312, main wheel; 313, bevel gear I; 32, spraying member; 321, booster pump I; 322, water inlet pipe I; 323, connecting pipe I; 324, transfer pipe; 325, spray pipe; 326, bevel gear ring I; 33, baffle plate; 4, cleaning unit; 41, linkage member; 411, follower wheel; 412, bevel gear II; 413, guide rod; 414, reciprocating screw rod; 42, cleaning member; 421, booster pump II; 422, water inlet pipe II; 423, telescopic connecting pipe; 424, moving block; 425, spray head; 43, bevel gear ring II; 5, belt. Detailed Description of the Embodiment

[0025] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the drawings and embodiments.

[0026] In one embodiment, as Figures 1 - 4As shown in the figure, a flue gas desulfurization structure for a thermal power plant includes a desulfurization tower 1. A smoke inlet pipe 11 is fixed at the front end of the desulfurization tower 1. A smoke outlet pipe 12 is fixed at the upper end of the desulfurization tower 1. And a support 2 is fixed on the outer wall of the desulfurization tower 1. Legs 21 are fixed at the corners of the bottom end of the support 2. A demister 13 is arranged inside the desulfurization tower 1;

[0027] A spraying unit 3 for desulfurizing the flue gas and a cleaning unit 4 for cleaning the demister 13 are further arranged inside the desulfurization tower 1. The spraying unit 3 is located above the smoke inlet pipe 11 and below the demister 13. The cleaning unit 4 is located above the demister 13.

[0028] In this embodiment, the flue gas enters the inside of the desulfurization tower 1 through the smoke inlet pipe 11. The spraying unit 3 performs desulfurization treatment on the flue gas. The desulfurized flue gas sequentially passes through the spraying unit 3, the demister 13 and the cleaning unit 4. Finally, the desulfurized flue gas is discharged through the smoke outlet pipe 12 to subsequent devices for treatment; when the demister 13 has been used for a long time, impurities accumulate on the surface of the demister 13, affecting the demisting effect of the demister 13. The cleaning unit 4 cleans the impurities accumulated on the surface of the demister 13, so as to ensure the demisting effect of the demister 13.

[0029] In an alternative embodiment, the spraying unit 3 includes a driving member 31 and a spraying member 32. The spraying member 32 includes a booster pump 321 installed at the upper end of the support 2. The water inlet end of the booster pump 321 is connected to a reaction liquid storage tank through a water inlet pipe 322. The water outlet end of the booster pump 321 is connected to a transfer pipe 324 through a connecting pipe 323. And the connecting pipe 323 is rotatably connected to the transfer pipe 324. The other end of the transfer pipe 324 is connected to a plurality of spray pipes 325. A plurality of atomizing nozzles are fixed at the lower ends of the plurality of spray pipes 325. And the plurality of spray pipes 325 are fixed to the inner wall of a bevel gear ring 326. The bevel gear ring 326 is connected to the driving member 31.

[0030] Specifically, the driving member 31 includes a motor 311 installed at the upper end of the support 2. A main wheel 312 is fixed to the output end of the motor 311. The main wheel 312 is connected to the cleaning unit 4 through a belt 5. The other end of the main wheel 312 extends into the desulfurization tower 1 and is fixedly connected to a bevel gear 313. The bevel gear 313 meshes with the bevel gear ring 326.

[0031] Among them, a plurality of blocking plates 33 are fixedly arranged at equal angles at the bottom end of the bevel gear ring 326. The blocking plates 33 are attached to the inner wall of the desulfurization tower 1.

[0032] It should be noted that the booster pump 321 extracts the reaction liquid through the first inlet pipe 322 and transports it to the adapter pipe 324 through the first connecting pipe 323. The adapter pipe 324 distributes the reaction liquid to each spray pipe 325, and finally the reaction liquid is sprayed out through the atomizing nozzles at the lower end of the spray pipe 325, thereby performing desulfurization treatment on the flue gas;

[0033] To ensure the spraying range of the reaction liquid, the motor 311 drives the first bevel gear 313 to drive the first bevel gear ring 326 to rotate. The first bevel gear ring 326 drives the spray pipe 325 inside it to rotate synchronously. Since the adapter pipe 324 is rotatably connected to the first connecting pipe 323, the first connecting pipe 323 is not affected. When the atomizing nozzles spray the reaction liquid, the atomizing nozzles rotate synchronously, thereby increasing the spraying range of the reaction liquid and increasing the contact area between the reaction liquid and the flue gas, which is more conducive to the desulfurization treatment of the flue gas;

[0034] After the reaction between the reaction liquid and the flue gas, solid substances will be formed. These solid substances are easily adsorbed on the inner wall of the desulfurization tower 1. The baffle 33 rotates synchronously with the first bevel gear ring 326, thereby scraping the solid substances on the inner wall of the desulfurization tower 1 to prevent the solid substances from accumulating on the inner wall of the desulfurization tower 1 and affecting the normal flow of the flue gas.

[0035] In an alternative embodiment, the cleaning unit 4 includes a linkage member 41 and a cleaning member 42. The linkage member 41 includes a follower wheel 411 rotatably installed on the outer wall of the desulfurization tower 1. The follower wheel 411 is connected to the main wheel 312 through a belt 5. One end of the follower wheel 411 extends into the desulfurization tower 1 and is fixedly connected to a second bevel gear 412. The second bevel gear 412 is meshed with a second bevel gear ring 43. The second bevel gear ring 43 is rotatably installed inside the desulfurization tower 1. An inner ring of the second bevel gear ring 43 is fixed with a demister 13, and a cleaning member 42 is arranged above the demister 13.

[0036] Among them, one end of the second bevel gear 412 away from the follower wheel 411 is fixedly connected to a reciprocating screw 414. A guide rod 413 is arranged above the reciprocating screw 414. Both ends of the guide rod 413 are fixed to the inner wall of the desulfurization tower 1, and the reciprocating screw 414 and the guide rod 413 are connected to the cleaning member 42.

[0037] Specifically, the cleaning member 42 includes a second booster pump 421 installed on the outer wall of the desulfurization tower 1. The water inlet end of the second booster pump 421 is connected to a cleaning water tank through a second inlet pipe 422. The water outlet end of the second booster pump 421 is connected to a moving block 424 through a telescopic connecting pipe 423. Three nozzles 425 are installed at the lower end of the moving block 424. The moving block 424 is threadedly connected to the reciprocating screw 414 and is slidably connected to the guide rod 413.

[0038] Among them, the three nozzles 425 are fixedly arranged at equal intervals at the lower end of the moving block 424.

[0039] It should be noted that the cleaning unit 4 starts to operate driven by the belt 5 of the spraying unit 3. After the demister 13 has been used for a long time, impurities accumulate on the surface of the demister 13, and at this time, the cleaning unit 4 is required to clean the demister 13;

[0040] Specifically, the booster pump II 421 extracts cleaning water through the water inlet pipe II 422, transports it through the telescopic connecting pipe 423 to the moving block 424, and finally the cleaning water is discharged through the nozzle 425, thereby cleaning the demister 13; to ensure the integrity of the cleaning range of the demister 13, the slave wheel 411 rotates driven by the belt 5 under the drive of the main wheel 312, the bevel gear II 412 rotates accordingly, the bevel gear II 412 drives the bevel gear ring II 43 to rotate, when the bevel gear ring II 43 rotates, it drives the demister 13 inside its inner ring to rotate, and the bevel gear II 412 drives the reciprocating screw 414 to rotate, and the moving block 424 makes a reciprocating linear motion along the reciprocating screw 414 under the limiting action of the guide rod 413, thereby realizing the cleaning of the entire demister 13 and preventing the lime water from accumulating on the surface of the demister 13 during long-term use and affecting the demisting effect of the demister.

[0041] In an optional embodiment, an anti-slip layer is provided at the bottom end of the leg 21.

[0042] It should be noted that an anti-slip layer is provided at the bottom end of the leg 21, thereby increasing the friction coefficient between the leg 21 and the ground and improving the stability during the operation of the structure.

[0043] The above embodiment discloses a flue gas desulfurization structure for a thermal power plant. Among them, the flue gas enters the desulfurization tower 1 through the flue gas inlet pipe 11 and first contacts the spraying unit 3 located above the flue gas inlet pipe.

[0044] The booster pump I 321 extracts the desulfurization reaction liquid from the liquid storage tank, distributes it through the transfer pipe 324 to the rotating spray pipe 325, and realizes full-coverage spraying through the atomizing nozzles.

[0045] The motor 311 drives the bevel gear I 313, drives the bevel gear ring I 326 and the inner ring spray pipe 325 to rotate slowly, and rotates synchronously with the baffle 33, which not only expands the spraying coverage area but also scrapes the reaction products (such as calcium sulfite solids) attached to the inner wall of the tower in real time to prevent blockage.

[0046] The reaction liquid fully contacts the SO2 in the flue gas, undergoes a neutralization reaction to generate solid particles, and the purified flue gas continues to rise.

[0047] The flue gas passing through the spraying area enters the demister 13 to ensure that the discharged gas is dry.

[0048] The motor 311 of the spraying unit drives the driven wheel 411 of the cleaning unit through the belt 5 at the same time. The driven wheel 411 drives the second bevel gear 412, and drives the second bevel gear ring 43 and the inner demister 13 to rotate slowly, so that each area can be evenly cleaned.

[0049] The second bevel gear 412 synchronously drives the reciprocating screw 414, drives the moving block 424 to move linearly back and forth along the guide rod 413, and the spray head 425 at its lower end sprays water mist evenly to cover the entire surface of the demister 13, so as to clean the surface of the demister 13.

[0050] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A flue gas desulfurization structure for a thermal power plant, characterized in that, It includes a desulfurization tower (1). A smoke inlet pipe (11) is fixed at the front end of the desulfurization tower (1). A smoke exhaust pipe (12) is fixed at the upper end of the desulfurization tower (1). And a support (2) is fixed on the outer wall of the desulfurization tower (1). Legs (21) are fixed at the bottom corners of the support (2). An eliminator (13) is arranged inside the desulfurization tower (1). A spraying unit (3) for desulfurizing the flue gas and a cleaning unit (4) for cleaning the eliminator (13) are also arranged inside the desulfurization tower (1). The spraying unit (3) is located above the smoke inlet pipe (11) and below the eliminator (13). The cleaning unit (4) is located above the eliminator (13).

2. The flue gas desulfurization structure for a thermal power plant according to claim 1, wherein, The spraying unit (3) includes a driving member (31) and a spraying member (32). The spraying member (32) includes a booster pump one (321) installed at the upper end of the support (2). The water inlet end of the booster pump one (321) is connected to a reaction liquid storage tank through a water inlet pipe one (322). The water outlet end of the booster pump one (321) is connected to a transfer pipe (324) through a connecting pipe one (323). And the connecting pipe one (323) is rotatably connected to the transfer pipe (324). The other end of the transfer pipe (324) is connected with a plurality of spray pipes (325). Atomizing nozzles are fixed at the lower ends of the plurality of spray pipes (325). And the plurality of spray pipes (325) are fixedly connected to the inner wall of a bevel gear ring one (326). The bevel gear ring one (326) is connected to the driving member (31).

3. The flue gas desulfurization structure for a thermal power plant according to claim 2, wherein, The driving member (31) includes a motor (311) installed at the upper end of the support (2). A main wheel (312) is fixed at the output end of the motor (311). The main wheel (312) is connected to the cleaning unit (4) through a belt (5). The other end of the main wheel (312) extends into the desulfurization tower (1) and is fixedly connected to a bevel gear one (313). The bevel gear one (313) meshes with the bevel gear ring one (326).

4. A flue gas desulfurization structure for a thermal power plant according to claim 3, characterized in that, A plurality of blocking plates (33) are fixed at equal angles at the bottom end of the bevel gear ring one (326). The blocking plates (33) are attached to the inner wall of the desulfurization tower (1).

5. The flue gas desulfurization structure for a thermal power plant according to claim 3, characterized in that, The cleaning unit (4) includes a linkage member (41) and a cleaning member (42). The linkage member (41) includes a driven wheel (411) rotatably installed on the outer wall of the desulfurization tower (1). The driven wheel (411) is connected to the main wheel (312) through a belt (5). One end of the driven wheel (411) extends into the desulfurization tower (1) and is fixedly connected to a bevel gear two (412). The bevel gear two (412) is meshed and connected to a bevel gear ring two (43). The bevel gear ring two (43) is rotatably installed inside the desulfurization tower (1). The inner ring of the bevel gear ring two (43) is fixedly provided with the eliminator (13). A cleaning member (42) is arranged above the eliminator (13).

6. A flue gas desulfurization structure for a thermal power plant according to claim 5, characterized in that, One end of the bevel gear two (412) far away from the slave wheel (411) is fixedly connected with a reciprocating screw rod (414). A guide rod (413) is arranged above the reciprocating screw rod (414). Two ends of the guide rod (413) are fixed to the inner wall of the desulfurization tower (1), and the reciprocating screw rod (414) and the guide rod (413) are connected with a cleaning member (42).

7. The flue gas desulfurization structure for a thermal power plant according to claim 6, characterized in that, The cleaning member (42) includes a booster pump two (421) installed on the outer wall of the desulfurization tower (1). The water inlet end of the booster pump two (421) is connected with a cleaning water tank through a water inlet pipe two (422). The water outlet end of the booster pump two (421) is connected with a moving block (424) through a telescopic connecting pipe (423). Three spray heads (425) are installed at the lower end of the moving block (424). The moving block (424) is threadedly connected with the reciprocating screw rod (414), and the moving block (424) is slidably connected with the guide rod (413).

8. A flue gas desulfurization structure for a thermal power plant according to claim 7, characterized in that, The three spray heads (425) are fixedly arranged at equal intervals at the lower end of the moving block (424).

9. A flue gas desulfurization structure for a thermal power plant according to claim 1, characterized in that, A non-slip layer is arranged at the bottom end of the leg (21).

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