Spraying mechanism of boiler desulfurization dust remover

Abstract

The utility model discloses a spraying mechanism of a boiler desulfurization dust remover, which belongs to the technical field of desulfurization and dust removal and comprises a smoke outlet barrel, a smoke inlet is arranged in the middle of the smoke outlet barrel, a smoke outlet is arranged at the top of the smoke outlet barrel, a desulfurization spraying mechanism is arranged in the middle of the smoke outlet barrel, and a secondary spraying mechanism is arranged at the top of the smoke outlet barrel. According to the device, the desulfurization spraying mechanism is arranged, in the process, slurry is supplied to the flow dividing head through the first ring pipe, the slurry is sprayed out through the three spraying pipes and the first spraying head, the slurry is sprayed out through the second ring pipe, and the slurry is sprayed out through the third spraying pipe and the second spraying head. The slurry can be in full contact with the smoke through spraying of the multiple first spraying heads, meanwhile, the lengths of the three spraying pipes are different, the sprayed slurry can be evenly distributed in the middle of the smoke outlet barrel, even spraying operation on the smoke in the smoke outlet barrel is achieved, and the spraying effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of desulfurization and dust removal technology, and in particular to a spraying mechanism for a boiler desulfurization and dust removal device. Background Technology

[0002] With the increasing global awareness of environmental protection, the emission of flue gas pollutants has become an environmental problem that governments and related industries around the world urgently need to solve. As an important energy conversion device in the industrial and energy fields, boilers generate a large amount of flue gas during operation, which contains harmful substances such as sulfur oxides (SO) and dust. If these substances are directly emitted into the atmosphere without effective treatment, they will cause serious pollution to the environment and affect air quality. At present, boiler desulfurization and dust removal technologies mainly include wet desulfurization, dry desulfurization, and semi-dry desulfurization. Among them, wet desulfurization is widely used in practical applications due to its high desulfurization efficiency and relatively mature technology system. Wet desulfurization systems usually use spray devices to contact desulfurization liquid with flue gas to achieve sulfur dioxide removal.

[0003] The existing wet flue gas desulfurization method involves installing multiple layers of ordinary spraying at the top of the flue gas stack. The slurry is sprayed from top to bottom through nozzles and reacts with the flue gas. When the sulfur content in the flue gas increases, the flue gas stack needs to be raised and ordinary spraying layers need to be installed, which increases the investment cost. Since the contact area between the flue gas and the slurry in the flue gas stack is limited, it is difficult to improve the desulfurization efficiency.

[0004] Existing patent (publication number: CN208893958U) discloses a high-efficiency atomizing desulfurization spray device, comprising a flue gas duct with a flue gas inlet and a flue gas outlet. Multiple high-efficiency atomizing desulfurization spray devices are vertically installed on the flue gas duct wall between the inlet and outlet. Each high-efficiency atomizing desulfurization spray device includes a high-efficiency centrifugal atomizing nozzle, which extends into the flue gas duct after passing through the duct wall. This utility model provides a high-efficiency atomizing desulfurization spray device that refines the slurry into a mist, increasing the contact area between the slurry and flue gas, allowing for full reaction of the flue gas, and improving desulfurization efficiency.

[0005] To address the aforementioned issues, existing patents offer solutions, but these solutions suffer from limitations such as the inability to perform uniform spraying and dual spraying of the flue gas inside the flue, and the inability to ensure uniform contact between the slurry and the flue gas for efficient desulfurization.

[0006] Therefore, a spraying mechanism for boiler desulfurization and dust removal is proposed. Utility Model Content

[0007] The purpose of this utility model is to provide a spraying mechanism for a boiler desulfurization and dust removal device, which can solve the problems of existing desulfurization spraying devices that cannot perform uniform spraying and double spraying operations on the flue gas inside the flue, and that cannot make the slurry evenly contact the flue gas to perform efficient desulfurization operations.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a boiler desulfurization and dust removal spraying mechanism, including a flue, an inlet in the middle of the flue, an outlet at the top of the flue, a desulfurization spraying mechanism in the middle of the flue, a secondary spraying mechanism at the top of the flue, a liquid supply mechanism on the side wall of the flue, and a filter mechanism at the bottom of the flue;

[0009] The desulfurization spraying mechanism includes a mounting cover disposed in the middle of the flue gas outlet, the middle of the mounting cover being conical, a first annular pipe disposed on the side wall of the flue gas outlet, a plurality of diverting heads disposed inside the mounting cover, the diverting heads being connected to the first annular pipe, and three spray pipes disposed on the side wall of the diverting heads, the three spray pipes having different lengths, and a first spray head disposed at one end of each spray pipe.

[0010] Preferably, the secondary spraying mechanism includes a cone disposed at the top of the flue, a plurality of liquid outlet pipes are installed inside the cone, a plurality of second spray heads are disposed on the side wall of the liquid outlet pipes, the second spray heads are located outside the cone, and a second ring pipe is disposed at the top of the cone, the second ring pipe being connected in communication with the liquid outlet pipes.

[0011] Preferably, the liquid supply mechanism includes a liquid supply pump disposed at the bottom of the flue, the input end of the liquid supply pump is connected to the bottom of the flue, and the output end of the liquid supply pump is provided with a liquid supply diversion pipe, which is connected to the first ring pipe and the second ring pipe.

[0012] Preferably, the filtration mechanism includes a guide plate disposed inside the flue, the bottom of the guide plate is semi-circular, the bottom of the guide plate is provided with multiple leakage holes, a filter element is disposed in the middle of the guide plate, and a maintenance component is disposed on the side wall of the flue.

[0013] Preferably, the maintenance assembly includes maintenance ports disposed on both sides of the flue, maintenance covers are bolted to the side walls of the maintenance ports, and the filter element is movably connected to the maintenance port.

[0014] Preferably, the first annular tube has a spiral blade inside, the spiral blade is fixedly connected to the first annular tube, and the spiral blade is arranged in a ring shape.

[0015] Preferably, a rotating shaft is provided in the middle of the flow divider head, and a flow divider impeller is provided on the side wall of the rotating shaft.

[0016] Preferably, a protective cover is bolted to the top of the cone, and the protective cover is umbrella-shaped.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. This application incorporates a desulfurization spraying mechanism. In this process, slurry is supplied to the distribution head through a first ring pipe, and then sprayed out through three spray pipes and a first spray head. The spraying from multiple first spray heads allows the slurry to fully contact the flue gas. At the same time, the three spray pipes have different lengths, which allows the sprayed slurry to be evenly distributed in the middle of the flue gas outlet, thus achieving uniform spraying of the flue gas inside the flue gas outlet and improving the spraying effect.

[0019] 2. This application incorporates a two-stage spraying mechanism. Through the cooperation of the second ring pipe, the liquid outlet pipe, and the second spray head, the slurry can be evenly sprayed around the cone, performing secondary spraying desulfurization on the flue gas and improving the desulfurization effect. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is an overall structural view of the present invention;

[0022] Figure 2 This is the left view of the present invention;

[0023] Figure 3 This utility model Figure 2 A three-dimensional cross-sectional view of point AA in the middle;

[0024] Figure 4 This is a schematic diagram of the desulfurization spray mechanism in this utility model;

[0025] Figure 5 This is a schematic diagram of the filtration mechanism in this utility model.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Flue gas outlet; 2. Flue gas inlet; 3. Flue gas outlet; 4. Desulfurization spray mechanism; 5. Secondary spray mechanism; 6. Liquid supply mechanism; 7. Filtration mechanism; 41. Mounting cover; 42. First ring pipe; 43. Diverter head; 44. Spray pipe; 45. First spray head; 51. Cone; 52. Liquid outlet pipe; 53. Second spray head; 54. Second ring pipe; 61. Liquid supply pump; 62. Liquid supply diverter pipe; 71. Guide plate; 72. Leakage hole; 73. Filter element; 74. Maintenance components; 741. Maintenance port; 742. Maintenance cover; 8. Spiral blade; 9. Rotating shaft; 10. Diverter impeller; 11. Protective cover. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figures 1 to 5 This utility model provides a technical solution:

[0030] A boiler desulfurization and dust removal spraying mechanism includes a flue duct 1, a flue gas inlet 2 in the middle of the flue duct 1, a flue gas outlet 3 at the top of the flue duct 1, a desulfurization spraying mechanism 4 in the middle of the flue duct 1, a secondary spraying mechanism 5 at the top of the flue duct 1, a liquid supply mechanism 6 on the side wall of the flue duct 1, and a filter mechanism 7 at the bottom of the flue duct 1.

[0031] The desulfurization spraying mechanism 4 includes a mounting cover 41 located in the middle of the flue gas duct 1. The middle part of the mounting cover 41 is conical. A first ring pipe 42 is provided on the side wall of the flue gas duct 1. Multiple diverting heads 43 are provided inside the mounting cover 41. The diverting heads 43 are connected to the first ring pipe 42. Three spray pipes 44 are provided on the side wall of the diverting heads 43. The three spray pipes 44 have different lengths. A first spray head 45 is provided at one end of each spray pipe 44.

[0032] Specifically, such as Figure 4 As shown, the secondary spraying mechanism 5 includes a cone 51 disposed at the top of the flue 1. Multiple liquid outlet pipes 52 are installed inside the cone 51. Multiple second spray heads 53 are disposed on the side wall of the liquid outlet pipes 52. The second spray heads 53 are located outside the cone 51. A second ring pipe 54 is disposed at the top of the cone 51. The second ring pipe 54 is connected to the liquid outlet pipes 52.

[0033] Specifically, such as Figure 3As shown, the liquid supply mechanism 6 includes a liquid supply pump 61 located at the bottom of the flue 1. The input end of the liquid supply pump 61 is connected to the bottom of the flue 1, and the output end of the liquid supply pump 61 is provided with a liquid supply diversion pipe 62. The liquid supply diversion pipe 62 is connected to the first ring pipe 42 and the second ring pipe 54.

[0034] Specifically, such as Figure 4 As shown, a spiral blade 8 is provided inside the first annular tube 42. The spiral blade 8 is fixedly connected to the first annular tube 42 and is arranged in a ring shape.

[0035] Specifically, such as Figure 4 As shown, a rotating shaft 9 is provided in the middle of the flow divider head 43, and a flow divider impeller 10 is provided on the side wall of the rotating shaft 9.

[0036] Specifically, such as Figure 4 As shown, a protective cover 11 is bolted to the top of the cone 51, and the protective cover 11 is umbrella-shaped.

[0037] The sulfur-containing flue gas generated by the boiler enters the flue gas stack 1 from the inlet 2. It first passes through the desulfurization spray mechanism 4, which consists of an installation cover 41, a first ring pipe 42, a distribution head 43, and spray pipes 44. A liquid supply pump 61 draws desulfurization liquid from the bottom of the flue gas stack 1 and delivers it to the first ring pipe 42 through the distribution pipe 62. Inside the first ring pipe 42, the desulfurization liquid is subjected to the action of the spiral blades 8, generating a rotating flow that evenly supplies the desulfurization liquid to the distribution head 43. The arrangement of the rotating shaft 9 and the distribution impeller 10 ensures that the desulfurization liquid is evenly distributed into the three spray pipes 44. The desulfurization liquid is then evenly distributed to the three spray pipes 44 of different lengths through the distribution head 43. The first spray head 45 at the end of each spray pipe 44 sprays the desulfurization liquid in a mist form, covering the flue gas flow area to achieve preliminary desulfurization. The flue gas, after preliminary desulfurization, continues to flow upwards... The flue gas is then lifted into the secondary spraying mechanism 5, which consists of a cone 51, an outlet pipe 52, and a second spray head 53. The desulfurization liquid enters the outlet pipe 52 inside the cone 51 from the second ring pipe 54, and is then sprayed out in the form of finer droplets through the second spray head 53 to perform secondary desulfurization treatment on the flue gas. This dual desulfurization design significantly improves the desulfurization efficiency. The sulfur-containing waste liquid and particulate matter generated during the desulfurization process fall down with the flue gas and finally enter the filter mechanism 7 at the bottom of the flue gas outlet 1. The filter mechanism 7 filters the waste liquid to remove particulate matter and impurities. The purified desulfurization liquid can be recycled, reducing operating costs. The protective cover 11 bolted to the top of the cone 51 is umbrella-shaped, mainly to prevent rainwater or other debris from entering the inside of the cone 51, affecting the spraying effect or causing equipment damage.

[0038] Specifically, such as Figure 5As shown, the filtration mechanism 7 includes a guide plate 71 disposed inside the flue 1. The bottom of the guide plate 71 is semi-circular and has multiple leakage holes 72. A filter element 73 is disposed in the middle of the guide plate 71, and a maintenance assembly 74 is disposed on the side wall of the flue 1.

[0039] Specifically, such as Figure 5 As shown, the maintenance assembly 74 includes maintenance ports 741 located on both sides of the flue 1. Maintenance covers 742 are bolted to the side walls of the maintenance ports 741, and the filter element 73 is movably connected to the maintenance ports 741.

[0040] After being treated by the desulfurization spray mechanism 4 and the secondary spray mechanism 5, the flue gas carrying some desulfurization waste liquid falls down and first encounters the guide plate 71. The bottom of the guide plate 71 is semi-circular, which can guide the waste liquid to flow along its surface. The filter element 73, as the core of filtration, effectively intercepts particulate matter and impurities in the waste liquid. The purified desulfurization liquid continues to fall and flows evenly into the bottom of the flue gas outlet 1 through multiple leakage holes 72. When the filter element 73 becomes clogged due to long-term use or requires maintenance, the operator can easily enter the inside of the flue gas outlet 1 by opening the inspection cover 742 to inspect or replace the filter element 73. The setting of the inspection port 741 makes the maintenance of the filter element 73 simple and quick, without disassembling the entire flue gas outlet 1 structure, reducing maintenance costs and time.

[0041] By adopting the above technical solution, the problems of existing desulfurization spray devices, such as the inability to perform uniform spraying and double spraying of flue gas inside the flue gas stack 1, and the inability to make the slurry contact the flue gas evenly and perform efficient desulfurization of the flue gas, are solved.

[0042] Working principle: In use, the sulfur-containing flue gas generated by the boiler first enters the flue gas outlet 1 through the inlet 2. The liquid supply pump 61 draws desulfurization liquid from the bottom of the flue gas outlet 1 and delivers it to the first ring pipe 42 through the liquid supply diversion pipe 62. The desulfurization liquid is evenly distributed to three spray pipes 44 of different lengths through the diversion head 43. The first spray head 45 at the end of the spray pipe 44 sprays the desulfurization liquid in a mist form, covering the flue gas flow area to achieve preliminary desulfurization. After preliminary desulfurization, the flue gas continues to rise, and the desulfurization liquid enters the outlet pipe 52 in the cone 51 from the second ring pipe 54. Then, it is sprayed out in the form of finer droplets through the second spray head 53 for secondary desulfurization treatment of the flue gas. After passing through the desulfurization spray mechanism 4 and The flue gas treated by the secondary spraying mechanism 5 carries some desulfurization waste liquid as it falls. It first encounters the guide plate 71, which has a semi-circular bottom to guide the waste liquid to flow along its surface. The filter element 73 acts as the core of the filter, effectively intercepting particulate matter and impurities in the waste liquid. The purified desulfurization liquid continues to fall and flows evenly into the bottom of the flue gas outlet 1 through multiple leakage holes 72. In this way, the sprayed slurry can be evenly distributed in the middle of the flue gas outlet 1, realizing uniform spraying of the flue gas inside the flue gas outlet 1. At the same time, it can make the slurry evenly sprayed around the cone 51 as the center, performing secondary spraying desulfurization of the flue gas and improving the desulfurization effect of the flue gas.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A boiler desulfurization dust collector spraying mechanism comprising a smoke outlet pipe (1), characterized in that: The middle part of the smoke outlet cylinder (1) is provided with a smoke inlet (2), the top part of the smoke outlet cylinder (1) is provided with a smoke outlet (3), the middle part of the smoke outlet cylinder (1) is provided with a desulfurization spraying mechanism (4), the top part of the smoke outlet cylinder (1) is provided with a secondary spraying mechanism (5), the sidewall of the smoke outlet cylinder (1) is provided with a liquid supply mechanism (6), and the bottom part of the smoke outlet cylinder (1) is provided with a filtering mechanism (7). The desulfurization spraying mechanism (4) comprises a mounting cover (41) arranged in the middle part of the smoke outlet cylinder (1), the middle part of the mounting cover (41) is conical, a first ring pipe (42) is arranged on the sidewall of the smoke outlet cylinder (1), a plurality of shunt heads (43) are arranged in the mounting cover (41), the shunt heads (43) are connected with the first ring pipe (42) in a penetrating mode, three spraying pipes (44) are arranged on the sidewall of the shunt head (43), the lengths of the three spraying pipes (44) are different, and one end of the spraying pipe (44) is provided with a first spraying head (45).

2. A spraying mechanism for a boiler desulfurization dust collector according to claim 1, characterized in that: The secondary spraying mechanism (5) comprises a conical cylinder (51) arranged on the top part of the smoke outlet cylinder (1), a plurality of liquid outlet pipes (52) are arranged in the conical cylinder (51), a plurality of second spraying heads (53) are arranged on the sidewall of the liquid outlet pipe (52), the second spraying heads (53) are located outside the conical cylinder (51), a second ring pipe (54) is arranged on the top part of the conical cylinder (51), and the second ring pipe (54) is connected with the liquid outlet pipe (52) in a penetrating mode.

3. A spraying mechanism for a boiler desulphurization dust collector according to claim 2, characterized in that: The liquid supply mechanism (6) comprises a liquid supply pump (61) arranged at the bottom part of the smoke outlet cylinder (1), the input end of the liquid supply pump (61) is connected with the bottom part of the smoke outlet cylinder (1) in a penetrating mode, the output end of the liquid supply pump (61) is provided with a liquid supply shunt pipe (62), and the liquid supply shunt pipe (62) is connected with the first ring pipe (42) and the second ring pipe (54) in a penetrating mode.

4. A spraying mechanism for a boiler desulfurization dust collector according to claim 1, characterized in that: The filtering mechanism (7) comprises a flow guide disc (71) arranged in the smoke outlet cylinder (1), the bottom part of the flow guide disc (71) is semicircular, a plurality of liquid leakage holes (72) are arranged on the bottom part of the flow guide disc (71), a filter core (73) is arranged on the middle part of the flow guide disc (71), and a maintenance assembly (74) is arranged on the sidewall of the smoke outlet cylinder (1).

5. A spray mechanism for a boiler desulphurization dust collector according to claim 4, characterized in that: The maintenance assembly (74) comprises a maintenance opening (741) arranged on the two sides of the smoke outlet cylinder (1), a maintenance cover (742) is bolted on the sidewall of the maintenance opening (741), and the filter core (73) is movably connected with the maintenance opening (741).

6. A spraying mechanism for a boiler desulfurization dust collector according to claim 1, characterized in that: The inside of the first ring pipe (42) is provided with a spiral blade (8), the spiral blade (8) is fixedly connected with the first ring pipe (42), and the spiral blade (8) is annular.

7. A spraying mechanism for a boiler desulfurization dust collector according to claim 1, characterized in that: The middle part of the shunt head (43) is provided with a rotating shaft (9), and the rotating shaft (9) is provided with a shunt impeller (10) on the sidewall.

8. A spray mechanism for a boiler desulphurization dust collector according to claim 2, characterized in that: The top part of the conical cylinder (51) is bolted with a protective cover (11), and the protective cover (11) is umbrella-shaped.

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