Lantern tube and tandem membrane wall in flue gas diverting chamber

Abstract

The utility model discloses a lantern tube and tandem membrane wall in the flue gas turning chamber, which are applied to the flue gas turning field, and include the boiler barrel, the bottom of the boiler barrel is respectively provided with a combustion chamber membrane wall hearth and a membrane wall burnout chamber, in the use of the flue gas turning chamber, biomass bulk material is ignited and combusted on an external fire grate of the flue gas turning chamber, and the membrane wall burnout chamber is used for burning the biomass bulk material. When flue gas reaches the flue gas steering chamber, the flue gas transversely scours the lantern pipe, the lantern pipe further absorbs heat of the flue gas, the flue gas enters the convection pipe set after the temperature of the flue gas is further reduced, the convection pipe set is matched with the flue gas to conduct convection, and then the flue gas is exhausted to a rear heat exchange structure through the flue gas exhaust pipe. The boiler barrel exhausts steam to a hot spot, a lantern pipe and a convection pipe set are designed to be connected with a membrane wall of a burnout chamber in series, convection heat exchange of smoke can be achieved, the temperature can be further lowered, ash in smoke at an outlet of a steering chamber is solidified, and the phenomena of ash sticking and ash blocking of the convection pipe set on the rear portion are avoided.

Description

Technical Field

[0001] The utility model belongs to the field of smoke diversion, in particular to a lantern tube and a series-connected membrane wall in a smoke diversion chamber. Background Art

[0002] Since biomass fuel contains high levels of potassium, sodium and calcium, the ash melting point in the flue gas is low during combustion. Although biomass boilers are designed with larger combustion chambers and burnout chambers to reduce the flue gas temperature entering the convection zone to below the ash melting point and avoid molten ash sticking to the pipes, some fuels still require the flue gas at the burnout chamber outlet to be even lower to meet the ash solidification requirements. Utility Model Content

[0003] The utility model aims to provide a lantern tube and a series membrane wall in a smoke turning chamber, which has the advantage of enabling smoke to achieve convective heat exchange, avoiding the phenomenon of dust sticking and clogging of the rear convection tube group, and replacing the inconvenient installation and disassembly of direct installation of flanges.

[0004] The above-mentioned technical purpose of the utility model is achieved through the following technical solutions: the lantern tube in the smoke deflection chamber includes a boiler drum, the bottom of the boiler drum is respectively provided with a combustion chamber membrane fireplace and a membrane wall burnout chamber, the bottom of the membrane wall burnout chamber is provided with a smoke deflection chamber, the inner side of the smoke deflection chamber is provided with a lantern tube, the top of the lantern tube is provided with a lantern tube upper membrane wall, one side of the lantern tube upper membrane wall is provided with a convection tube group, the top of the convection tube group is provided with a smoke exhaust pipe, one end of the smoke exhaust pipe is provided with a connecting pipe that penetrates into the inside of the smoke exhaust pipe, the surface of the connecting pipe is fixedly sleeved with a ring, the top and bottom of one side of the ring are provided with contact plates, and the top and bottom of the smoke exhaust pipe are fixedly installed with fixing blocks.

[0005] The above technical solution is adopted: in the use of the flue gas turning chamber, after the biomass bulk is ignited and burned on the external grate of the flue gas turning chamber, it burns in the membrane hearth of the combustion chamber and releases heat, and its heat is absorbed by the membrane wall of the combustion chamber. At this time, the flue gas temperature at the external furnace outlet of the flue gas turning chamber is cooled down, and the flue gas coming out of the furnace is burned again in the membrane wall burnout chamber, and the heat is absorbed by the membrane wall of the burnout chamber again, and the flue gas temperature is further cooled down; when the flue gas reaches the flue gas turning chamber, the flue gas horizontally flushes the lantern tube, and the lantern tube further absorbs the heat of the flue gas. After further reducing the flue gas temperature, it enters the convection tube group, and the convection tube group cooperates with the flue gas for convection, and then the flue gas is discharged by the flue gas exhaust. The outlet pipe is discharged to the heat exchange structure at the rear, in which the boiler drum discharges steam to the hot spot. By designing the lantern tube and the convection tube group in series with the membrane wall of the burnout chamber, the flue gas can realize convection heat exchange and the temperature can be further reduced to solidify the ash in the flue gas at the outlet of the turning chamber to avoid ash sticking and ash blockage in the rear convection tube group. At this time, the flue gas exhaust pipe is installed with the connecting pipe first, and the connecting pipe is installed with the external heat exchange mechanism through the flange. This installation method will facilitate the maintenance and unblocking of the flue gas exhaust pipe when a fault occurs in the turning chamber. Although there are certain inconveniences in the initial installation, the subsequent maintenance and installation will replace the inconvenient installation and disassembly of the direct installation of the flange, which will bring convenience to use.

[0006] The utility model is further configured that the membrane-type fireplace chamber of the combustion chamber and the membrane-type wall burnout chamber are communicated with each other.

[0007] The above technical solution is adopted: the smoke is easily transferred and circulated from the membrane-type fireplace of the combustion chamber to the membrane-type wall burnout chamber through mutual communication.

[0008] The utility model is further configured that the inner wall of the combustion chamber membrane fireplace is formed with a combustion chamber membrane wall, and the inner wall of the membrane wall burnout chamber is formed with a burnout chamber membrane wall.

[0009] The above technical solution is adopted: the combustion chamber membrane wall and the burnout chamber membrane wall are used in conjunction with the flue gas for cooling.

[0010] The utility model is further configured that the number of the convection tube groups is two.

[0011] The above technical solution is adopted: convection is carried out by coordinating the flue gas through the convection tube group.

[0012] The utility model is further configured that the internal thread of the fixing block is connected with a screw rod, and one end of the screw rod is rotatably connected to the contact plate through a bearing.

[0013] By adopting the above technical solution, progressive movement inside the fixed block can be achieved through the rotation of the screw.

[0014] The utility model is further configured that a rocking wheel is fixedly mounted on the other end of the screw rod.

[0015] The above technical solution is adopted: the screw rod can be driven to rotate by the rocking wheel.

[0016] The utility model is further configured that one end of the connecting pipe is fixedly sleeved with a flange.

[0017] The above technical solution is adopted: the flange is used to cooperate with the external heat exchange mechanism and the connecting pipe for connection.

[0018] The utility model is further configured that a sealing ring is fixedly adhered to one end of the smoke exhaust pipe.

[0019] The above technical solution is adopted: the sealing between the connecting pipe and the smoke exhaust pipe is ensured by a sealing ring.

[0020] The serial membrane wall provided by the utility model comprises the lantern tube in the smoke turning chamber.

[0021] In summary, the utility model has the following beneficial effects:

[0022] 1. In the use of the flue gas turning chamber of the utility model, after the biomass bulk is ignited and burned on the external grate of the flue gas turning chamber, it burns in the membrane-type fireplace of the combustion chamber. When the flue gas reaches the flue gas turning chamber, the flue gas horizontally flushes the lantern tube, and the lantern tube further absorbs the heat of the flue gas. After the flue gas temperature is further reduced, it enters the convection tube group, and the convection tube group cooperates with the flue gas for convection, and then is discharged to the rear heat exchange structure by the flue gas discharge pipe, wherein the boiler drum discharges the steam to the hot spot. By designing the lantern tube and the convection tube group, and connecting them in series with the membrane wall of the burnout chamber, the flue gas can realize convection heat exchange, and the temperature can be further reduced, so that the ash in the flue gas at the outlet of the turning chamber is solidified, and the phenomenon of ash sticking and ash blocking of the rear convection tube group is avoided;

[0023] 2. In the use of the smoke exhaust pipe of the utility model, the smoke exhaust pipe is installed with the connecting pipe first, and the connecting pipe is then installed with the external heat exchange mechanism through the flange. This installation method will facilitate the maintenance and dredging of the smoke exhaust pipe when a fault occurs in the turning chamber. Although there are certain inconveniences in the initial installation, the subsequent maintenance and installation will replace the inconvenience of installation and disassembly of direct installation with the flange, bringing convenience to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the smoke exhaust pipe and the connecting pipe of the utility model;

[0026] Figure 3It is an enlarged schematic diagram of the front view and cross-section of the smoke exhaust pipe and the connecting pipe structure of the utility model.

[0027] Figure numerals: 1. boiler drum; 2. combustion chamber membrane fireplace; 3. membrane wall burnout chamber; 4. flue gas turning chamber; 5. lantern tube; 6. membrane wall on lantern tube; 7. convection tube group; 8. flue gas outlet; 9. connecting pipe; 10. collar; 11. contact plate; 12. fixing block; 13. screw; 14. rocker; 15. flange; 16. sealing ring. DETAILED DESCRIPTION

[0028] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0029] Embodiment 1:

[0030] refer to Figure 1 The lantern tube in the flue gas deflection chamber comprises a boiler drum 1, the bottom of the boiler drum 1 is respectively provided with a combustion chamber membrane fireplace 2 and a membrane wall burnout chamber 3, the bottom of the membrane wall burnout chamber 3 is provided with a flue gas deflection chamber 4, the inner side of the flue gas deflection chamber 4 is provided with a lantern tube 5, the top of the lantern tube 5 is provided with a lantern tube upper membrane wall 6, one side of the lantern tube upper membrane wall 6 is provided with a convection tube group 7, and the top of the convection tube group 7 is provided with a flue gas exhaust pipe 8. When the flue gas deflection chamber 4 is used, the biomass bulk is ignited and burned on the external grate of the flue gas deflection chamber 4, and then burns in the combustion chamber membrane fireplace 2. When the flue gas reaches the flue gas turning chamber 4, the flue gas horizontally flushes the lantern tube 5, and the lantern tube 5 further absorbs the heat of the flue gas. After the flue gas temperature is further reduced, it enters the convection tube group 7. The convection tube group 7 cooperates with the flue gas for convection, and then is discharged to the rear heat exchange structure through the flue gas exhaust pipe 8, wherein the boiler drum 1 discharges the steam to the hot spot. By designing the lantern tube 5 and the convection tube group 7 to be connected in series with the membrane wall 31 of the burnout chamber, the flue gas can realize convection heat exchange, and the temperature can be further reduced, so as to solidify the ash in the flue gas at the outlet of the turning chamber, and avoid the phenomenon of ash sticking and ash blocking in the rear convection tube group 7.

[0031] refer to Figure 1 The combustion chamber membrane fireplace 2 and the membrane wall burnout chamber 3 are interconnected, and the mutual connection facilitates the transfer and flow of smoke from the combustion chamber membrane fireplace 2 to the membrane wall burnout chamber 3.

[0032] refer to Figure 1 The inner wall of the combustion chamber membrane fireplace 2 is formed with a combustion chamber membrane wall 21, and the inner wall of the membrane wall burnout chamber 3 is formed with a burnout chamber membrane wall 31. The combustion chamber membrane wall 21 and the burnout chamber membrane wall 31 are used in conjunction with the flue gas for cooling.

[0033] refer to Figure 1 The number of convection tube groups 7 is two, and convection is performed by coordinating the flue gas through the convection tube groups 7 .

[0034] Brief description of the use process: When the flue gas turning chamber 4 is used, after the biomass bulk material is ignited and burned on the external grate of the flue gas turning chamber 4, it burns in the membrane hearth 2 of the combustion chamber and releases heat, and the heat is absorbed by the membrane wall 21 of the combustion chamber. At this time, the flue gas temperature at the external furnace outlet of the flue gas turning chamber 4 is cooled down, and the flue gas coming out of the furnace is burned again in the membrane wall burnout chamber 3, and the heat is absorbed by the membrane wall 31 of the burnout chamber again, and the flue gas temperature is further cooled down; when the flue gas reaches the flue gas turning chamber 4, the flue gas is horizontally The lantern tube 5 is flushed, and the lantern tube 5 further absorbs the heat of the flue gas. After the flue gas temperature is further reduced, it enters the convection tube group 7. The convection tube group 7 cooperates with the flue gas for convection, and then is discharged to the heat exchange structure at the rear through the flue gas exhaust pipe 8, wherein the boiler drum 1 discharges the steam to the hot spot. By designing the lantern tube 5 and the convection tube group 7 to be connected in series with the membrane wall 31 of the burnout chamber, the flue gas can realize convection heat exchange, and the temperature can be further reduced, thereby solidifying the ash in the flue gas at the outlet of the turning chamber, and avoiding the phenomenon of ash sticking and ash blocking in the rear convection tube group 7.

[0035] Embodiment 2:

[0036] refer to Figure 1 , Figure 2 and Figure 3 The lantern tube and the series membrane wall in the smoke deflection chamber include a boiler drum 1. One end of the smoke exhaust pipe 8 is provided with a connecting pipe 9 that penetrates into the inside of the smoke exhaust pipe 8. A collar 10 is fixedly sleeved on the surface of the connecting pipe 9. Contact plates 11 are provided on the top and bottom of one side of the collar 10. Fixed blocks 12 are fixedly installed on the top and bottom of the smoke exhaust pipe 8. When the smoke exhaust pipe 8 is in use, the smoke exhaust pipe 8 is preferentially installed with the connecting pipe 9, and the connecting pipe 9 is then installed with the external heat exchange mechanism through the flange 15. This installation method will facilitate the maintenance and dredging of the smoke exhaust pipe 8 when a fault occurs in the deflection chamber. Although there are certain inconveniences in the initial installation, the subsequent maintenance and installation will replace the inconvenience of installation and disassembly of the direct installation of the flange 15, which brings convenience to use.

[0037] refer to Figure 3 The internal thread of the fixed block 12 is connected with a screw rod 13 , one end of the screw rod 13 is rotatably connected to the contact plate 11 via a bearing, and the rotation of the screw rod 13 will realize progressive movement inside the fixed block 12 .

[0038] refer to Figure 2 A rocking wheel 14 is fixedly mounted on the other end of the screw rod 13, and the rocking wheel 14 is used to drive the screw rod 13 to rotate.

[0039] refer to Figure 2 One end of the connecting pipe 9 is fixedly sleeved with a flange 15, and the flange 15 is used to cooperate with the external heat exchange mechanism to connect with the connecting pipe 9.

[0040] refer to Figure 3 A sealing ring 16 is fixedly bonded to one end of the smoke exhaust pipe 8 , and the sealing ring 16 ensures the sealing between the connecting pipe 9 and the smoke exhaust pipe 8 .

[0041] Brief description of the use process: When using the smoke exhaust pipe 8, the smoke exhaust pipe 8 is installed with the connecting pipe 9 first, and the connecting pipe 9 is then installed with the external heat exchange mechanism through the flange 15. This installation method will facilitate the maintenance and dredging of the smoke exhaust pipe 8 when a fault occurs in the turning chamber. Although there are certain inconveniences in the initial installation, the subsequent maintenance and installation will replace the inconvenience of installation and disassembly of the direct installation of the flange 15, bringing convenience to use.

[0042] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A lantern tube in a smoke deflection chamber, comprising a boiler drum (1), characterized in that: The bottom of the boiler drum (1) is respectively provided with a combustion chamber membrane fireplace (2) and a membrane wall burnout chamber (3); the bottom of the membrane wall burnout chamber (3) is provided with a smoke deflection chamber (4); the inner side of the smoke deflection chamber (4) is provided with a lantern tube (5); the top of the lantern tube (5) is provided with a lantern tube upper membrane wall (6); one side of the lantern tube upper membrane wall (6) is provided with a convection tube group (7); the top of the convection tube group (7) is provided with a smoke exhaust pipe (8); one end of the smoke exhaust pipe (8) is provided with a connecting pipe (9) penetrating into the inside of the smoke exhaust pipe (8); a collar (10) is fixedly sleeved on the surface of the connecting pipe (9); the top and bottom of one side of the collar (10) are provided with contact plates (11); the top and bottom of the smoke exhaust pipe (8) are fixedly installed with fixing blocks (12).

2. The lantern tube in the smoke deflection chamber according to claim 1, characterized in that: The combustion chamber membrane hearth (2) and the membrane wall burnout chamber (3) are communicated with each other.

3. The lantern tube in the smoke deflection chamber according to claim 1, characterized in that: The inner wall of the combustion chamber membrane hearth (2) is formed with a combustion chamber membrane wall (21), and the inner wall of the membrane wall burnout chamber (3) is formed with a burnout chamber membrane wall (31).

4. The lantern tube in the smoke deflection chamber according to claim 1, characterized in that: The number of the convection tube groups (7) is two.

5. The lantern tube in the smoke deflection chamber according to claim 1, characterized in that: The fixing block (12) is internally threadedly connected with a screw rod (13), and one end of the screw rod (13) is rotatably connected to the contact plate (11) via a bearing.

6. The lantern tube in the smoke deflection chamber according to claim 5, characterized in that: A rocking wheel (14) is fixedly mounted on the other end of the screw rod (13).

7. The lantern tube in the smoke deflection chamber according to claim 1, characterized in that: One end of the connecting pipe (9) is fixedly sleeved with a flange (15).

8. The lantern tube in the smoke deflection chamber according to claim 1, characterized in that: A sealing ring (16) is fixedly bonded to one end of the smoke exhaust pipe (8).

9. Series membrane wall, characterized in that: Comprising a lantern tube in a smoke deflection chamber as described in any one of claims 1-8.

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