Bundled straw direct-fired module fast-assembly boiler

Abstract

The invention relates to a bundled straw direct-fired module fast-assembly boiler which is partially arranged above a fire grate and comprises a stock bin, a direct-fired module, a direct-fired module and a direct-fired module, the combustion cavity is located below the stock bin; the water cooling device and the stock bin are arranged in the length direction of the fire grate, and the water cooling device is connected to the combustion cavity; the heat exchange device is connected to the water cooling device and located on the side, away from the stock bin, of the water cooling device. According to the technical scheme, the combustion cavity is arranged below the stock bin, so that the whole bag breaking process is in a high-temperature environment, the bag breaking difficulty is reduced, meanwhile, most straw fuel is consumed, and the subsequent fuel consumption pressure is relieved; meanwhile, the stock bin, the water cooling system and the heat exchange device are all independent modules and can be independently transported to an installation site to be combined and spliced conveniently, compared with a traditional boiler, a large amount of site building and welding work is omitted, the installation period is greatly shortened, and the installation cost is reduced.

Description

Technical Field

[0001] The invention relates to the field of straw combustion devices, in particular to a bundled straw direct-fired module quick-install boiler. Background Art

[0002] With the development of straw bale direct combustion technology, the furnace body that matches it has also been updated. The furnace structure of existing straw bale direct combustion boilers is mostly a continuation of the traditional coal-fired boiler with a furnace arch design. However, straw fuel has the characteristics of high volatile content, fast combustion speed, and low energy density, which is completely different from coal burning and is not suitable for straw fuel combustion.

[0003] Existing straw baled direct-fired boilers with a rated power exceeding 10.5MW are limited by their size and weight and cannot be transported out of the factory as a whole. They need to be built with refractory concrete materials at the installation site, and a lot of welding work is also required. This will take a long time to install and the installation cost will be very high. Summary of the invention

[0004] The purpose of the present invention is to provide a straw bale direct-fired modular quick-install boiler to solve the problems of inconvenient transportation and complicated installation of the existing straw bale direct-fired boiler.

[0005] To achieve the above object, the present invention adopts the following technical solutions: A bundled straw direct-fired modular quick-install boiler, part of which is arranged above the grate, comprising: Silo; A combustion chamber, located below the silo; A water cooling device, the water cooling device and the silo are arranged along the length direction of the grate and connected to the combustion chamber; The heat exchange device is connected to the water cooling device and is located on a side of the water cooling device away from the silo.

[0006] Preferably, a fire outlet is provided on a side of the combustion chamber close to the water cooling device, and a connecting port is provided on a side of the water cooling device close to the combustion chamber. The fire outlet and the connecting port are connected by a connecting arch, and the connecting arch is located outside the silo.

[0007] Preferably, the water cooling device comprises a first water cooling part and a second water cooling part, and the first water cooling part and the second water cooling part are connected.

[0008] Preferably, the first water-cooling part includes a first boiler drum, a first membrane wall tube group and a first header; one end of the first membrane wall tube group is connected to the boiler drum, and the other end is connected to the first header; there are at least two groups of the first membrane wall tube groups, and the first membrane wall tube groups are arranged at intervals.

[0009] Preferably, the first water-cooling part also includes a first membrane wall side tube group, a first upper header and a first lower header; the first membrane wall side tube group is arranged on a side of the first membrane wall tube group close to the combustion chamber, and is surrounded by the first membrane wall tube group to form a first furnace; the top end of the first membrane wall side tube group is connected to the first upper header, the first upper header is connected to the first boiler drum, the bottom end of the first membrane wall side tube group is connected to the first lower header, and the first lower header is connected to the first header.

[0010] Preferably, the second water-cooling part includes a second boiler drum, a second membrane wall tube group and a second header; one end of the second membrane wall tube group is connected to the second boiler drum, and the other end is connected to the second header; there are at least two groups of the second membrane wall tube groups, and the second membrane wall tube groups are arranged at intervals.

[0011] Preferably, the second water-cooling part also includes a second membrane wall side tube group, a second upper header and a second lower header; the second membrane wall side tube group is arranged on a side of the second membrane wall tube group close to the heat exchange device, and is surrounded by the second membrane wall tube group to form a second furnace; the top end of the second membrane wall side tube group is connected to the second upper header, the second upper header is connected to the second boiler drum, the bottom end of the second membrane wall side tube group is connected to the second lower header, and the second lower header is connected to the second header.

[0012] Preferably, the water cooling device further includes a first connecting water box and a second connecting water box, the first connecting water box is connected to the first boiler drum and the second boiler drum, and the second connecting water box is connected to the first header and the second header.

[0013] Preferably, the height of the first membrane wall side tube group is smaller than that of the second membrane wall side tube group, the first lower header is "U"-shaped and the opening is arranged downward, the opening is the connecting port, and the second membrane wall side tube group is provided with a smoke outlet.

[0014] Preferably, a plurality of bag breaking devices are provided in the combustion chamber, each of the bag breaking devices comprises a bag breaking roller and a heat collecting air distribution pipe, the heat collecting air distribution pipe comprises a vertical portion and a horizontal portion, the vertical portion is connected to one end of the bag breaking roller, and the other end is connected to the horizontal portion, the horizontal portion and the bag breaking roller are parallel and spaced apart, and a mutual ventilation duct is formed between the bag breaking roller and the horizontal portion.

[0015] Preferably, the bag breaking roller is hollow, and a plurality of hollow spikes are extended from the outer side wall of the bag breaking roller, each of the hollow spikes is connected to the bag breaking roller, and each of the hollow spikes is provided with a first air outlet.

[0016] Preferably, the outer side wall of the horizontal portion extends to form a plurality of hollow short tubes, each of the hollow short tubes is connected to the horizontal portion, and each of the hollow short tubes is provided with a second air outlet.

[0017] Preferably, the bag breaking device also includes a driving member and a blower, the driving member is connected to one end of the bag breaking roller away from the heat collecting air distribution pipe; the blower is connected to one end of the heat collecting air distribution pipe away from the bag breaking roller.

[0018] Preferably, the heat exchange device is arranged on the ground, and comprises: an inlet smoke box, a circulation component and an outlet smoke box, one end of the circulation component is connected to the inlet smoke box, and the other end is connected to the outlet smoke box; the inlet smoke box is connected to the smoke outlet of the water cooling device.

[0019] Preferably, the circulation component includes a first return smoke pipe, a second return smoke pipe and a turning smoke chamber, one end of the first return smoke pipe is connected to the inlet smoke box, and the other end is connected to the turning smoke chamber; one end of the second return smoke pipe is connected to the turning smoke chamber, and the other end is connected to the outlet smoke box.

[0020] Compared with the prior art, the present invention has the following beneficial effects: According to the characteristics of straw fuel such as high proportion of volatile matter in combustion, fast combustion speed and low energy density, the above technical solution provides a modular quick-install boiler for direct combustion of bundled straw. Compared with the traditional boiler in the prior art, the furnace arch is eliminated, which is more suitable for straw combustion and reduces production costs. By setting the combustion chamber under the silo, the entire bale breaking process is in a high-temperature environment, which reduces the difficulty of bale breaking, consumes most of the straw fuel and reduces the pressure of subsequent fuel consumption. At the same time, the silo, water cooling system and heat exchange device are all independent modules, which are easy to be transported independently to the installation site for assembly and splicing. Compared with traditional boilers, a large amount of on-site masonry and welding work is saved, which greatly shortens the installation period and reduces the installation cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a side view of a modular quick-install boiler for direct combustion of bale straw in an embodiment of the present invention.

[0022] Figure 2 It is a schematic diagram of a bale breaking device in a bale straw direct-fired modular quick-install boiler according to an embodiment of the present invention.

[0023] Figure 3 It is a stepped cross-sectional schematic diagram of a water cooling device in a straw bale direct-fired modular quick-install boiler according to an embodiment of the present invention.

[0024] Figure 4 This is a schematic diagram of the water cooling device in the bale straw direct-fired modular quick-install boiler before assembly in an embodiment of the present invention.

[0025] Description of the accompanying symbols: 1. Grate; 2. Silo; 21. Feed inlet; 3. Combustion chamber; 31. Fire outlet; 32. Bag breaking device; 321. Bag breaking roller; 3211. Hollow spike; 3212. First air outlet; 322. Heat collecting air distribution duct; 3221. Hollow short tube; 3222. Second air outlet; 323. Driving member; 324. Blower; 325. Sealing member; 326. Bellows; 33. Furnace door; 4. Water cooling device; 41. Connecting port; 42. First water cooling part; 421. First boiler drum; 422. First membrane wall tube group; 423. First header; 424. First membrane wall side tube group; 425. First upper header; 426. First lower header; 427. First downcomer; 43. Second water cooling part; 431. Second boiler drum; 432. Second membrane wall tube group; 433. Second header; 434. Second membrane wall side tube group; 4341. Smoke outlet; 435. Second upper header; 436. Second lower header; 437. Second downcomer; 44. First connecting water box; 45. Second connecting water box; 46. Observation door; 5. Heat exchange device; 51. Inlet smoke box; 52. Outlet smoke box; 53. First return smoke pipe; 54. Second return smoke pipe; 55. Turning smoke chamber; 551. Ash cleaning door; 6. Connecting arch; 7. Burnout fan. DETAILED DESCRIPTION

[0026] The present invention will be described in more detail below in conjunction with the accompanying drawings. It should be noted that the description of the present invention with reference to the accompanying drawings is only illustrative and not restrictive. The various embodiments can be combined with each other to form other embodiments not shown in the following description.

[0027] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] An embodiment of the present invention provides a modular quick-install boiler for direct combustion of baled straw, which is connected to a water cooling device 4 via a combustion chamber 3 arranged below a silo 2, and the water cooling device 4 is connected to a heat exchange device 5, wherein the silo 2, the water cooling device 4, and the heat exchange device 5 are all independent modules, which can be independently transported to the installation site for assembly and splicing, thereby eliminating a large amount of on-site masonry and welding work compared to traditional boilers, greatly shortening the installation period and reducing the installation cost; at the same time, the combustion chamber 3 is arranged below the silo 2, so that the entire bale breaking process is in a high-temperature environment, reducing the difficulty of bale breaking, while consuming most of the straw fuel, alleviating the subsequent fuel consumption pressure.

[0030] See also Figures 1 to 4 The bale straw direct-fired modular quick-install boiler includes a silo 2 with a combustion chamber 3 arranged below, a water cooling device 4 connected to the combustion chamber 3, and a heat exchange device 5 connected to the water cooling device 4; wherein the silo 2 and the water cooling device 4 are arranged on the grate 1 and along the length direction of the grate 1, and the heat exchange device 5 is arranged upright on the ground.

[0031] In one of the embodiments, a feed port 21 is provided above the silo 2; a combustion chamber 3 is arranged below the silo 2 to receive the straw dropped from the silo 2 for direct combustion, and a side wall of the combustion chamber 3 is a concrete-wrapped membrane wall structure, and the concrete has heat storage properties and is used to create a high-temperature environment; a plurality of bag breaking devices 32 are provided in the combustion chamber 3, wherein the bag breaking devices 32 are located at an upper position in the combustion chamber 3, so that the entire bag breaking process is always in a high-temperature environment, reducing the difficulty of bag breaking while consuming most of the fuel, reducing the subsequent combustion pressure, facilitating early contact with the dropped straw and reserving more falling space for the burned straw. Specifically, the bag breaking device 32 includes a bag breaking roller 321, a heat collecting air distribution pipe 322, a driving member 323 and a blower 324; one end of the bag breaking roller 321 is connected to the driving member 323, and the other end is connected to the heat collecting air distribution pipe 322, and the end of the heat collecting air distribution pipe 322 away from the bag breaking roller 321 is connected to the blower 324; a sealing member 325 is also provided between the bag breaking roller 321 and the driving member 323 to strengthen the sealing strength between the bag breaking roller 321 and the driving member 323, and the heat collecting air distribution pipe 322 A seal 325 is also provided between the heat collecting air distribution pipe 322 and the bag breaking roller 321 to strengthen the sealing strength between the heat collecting air distribution pipe 322 and the bag breaking roller 321, wherein the driving member 323 is a reducer to drive the bag breaking roller 321 to rotate; in addition, a bellows 326 is also provided between the heat collecting air distribution pipe 322 and the blower 324 to increase air flow to improve combustion efficiency. The cooperation of the blower 324 and the bellows 326 can provide high-temperature and high-pressure combustion-supporting air in the combustion chamber 3, thereby further improving the straw combustion efficiency.

[0032] Specifically, the bag breaking roller 321 is hollow and its outer side wall extends to form a plurality of hollow spikes 3211 connected to the bag breaking roller 321, each of the hollow spikes 3211 is provided with a first air outlet 3212, and the plurality of hollow spikes 3211 facilitate tearing the bales of straw so that the straw can be burned more completely; the heat collecting air distribution duct 322 includes a vertical portion and a horizontal portion, the vertical portion is connected to one end of the bag breaking roller 321, and the other end is connected to the horizontal portion; it can be understood that the bag breaking roller 321 and the heat collecting air distribution duct 322 are connected; the outer side wall of the horizontal portion extends to form a plurality of hollow short tubes 3221 connected to the horizontal portion, each of the hollow short tubes 3221 is provided with a second air outlet 3222; the second air outlet 3222 is inclined at an angle to guide the direction of ejecting high-temperature and high-pressure combustion-supporting air toward the heat exchange device 5.

[0033] In one embodiment, a fire outlet 31 is provided on one side of the combustion chamber 3 close to the water cooling device 4, and a connecting port 41 is provided on one side of the water cooling device 4 close to the combustion chamber 3. The fire outlet 31 and the connecting port 41 are connected by a connecting arch 6; wherein the connecting arch 6 is located outside the silo 2 for easy maintenance by operators; the water cooling device 4 includes a first water cooling part 42 and a second water cooling part 43 connected thereto, and the water cooling device 4 can be arranged in blocks for easy transportation and installation.

[0034] In one embodiment, a furnace door 33 is further provided on one side of the combustion chamber 3 to facilitate operators to inspect and repair the combustion chamber 3 .

[0035] Specifically, the first water-cooling unit 42 includes a first drum 421, a first membrane wall tube group 422, a first downcomer 427, a first header 423, a first membrane wall side tube group 424, a first upper header 425 and a first lower header 426; one end of the first membrane wall tube group 422 is connected to the first drum 421, and the other end is connected to the first header 423; the first membrane wall tube group 422 is provided with at least two groups, and each first membrane wall tube group 422 is arranged at intervals; one end of the first downcomer 427 is connected to the first downcomer 425; A boiler drum 421, the other end of which is connected to the first collecting box 423; the first membrane wall side tube group 424 is arranged on the side of the first membrane wall tube group 422 close to the combustion chamber 3, and is arranged together with the first membrane wall tube group 422 to form a first furnace; the top end of the first membrane wall side tube group 424 is connected to the first upper collecting box 425, the first upper collecting box 425 is connected to the first boiler drum 421, and the bottom end of the first membrane wall side tube group 424 is connected to the first lower collecting box 426, and the first lower collecting box 426 is connected to the first collecting box 423.

[0036] The second water-cooling unit 43 includes a second boiler drum 431, a second membrane wall tube group 432, a second downcomer 437, a second header 433, a second membrane wall side tube group 434, a second upper header 435 and a second lower header 436; one end of the second membrane wall tube group 432 is connected to the second boiler drum 431, and the other end is connected to the second header 433; the second membrane wall tube group 432 is provided with at least two groups, each second membrane wall tube group 432 is arranged at intervals, one end of the second downcomer 437 is connected to the second boiler drum 431, and the other end is connected to the second header 433; the second membrane wall side tube group 434 is arranged on the side of the second membrane wall tube group 432 close to the heat exchange device 5, and is surrounded by the second membrane wall tube group 432 to form a second furnace; the top end of the second membrane wall side tube group 434 is connected to the second upper header 435, the second upper header 435 is connected to the second boiler drum 431, and the bottom end of the second membrane wall side tube group 434 is connected to the second lower header 436, and the second lower header 436 is connected to the second header 433.

[0037] Among them, the water cooling device 4 also includes a first connecting water box 44 and a second connecting water box 45, the first boiler drum 421 and the second boiler drum 431 are connected through the first connecting water box 44, and the first collecting box 423 and the second collecting box 433 are connected through the second connecting water box 45; it can be understood that the first furnace and the second furnace are connected, which is conducive to the full combustion of volatiles and the sedimentation of large particles of smoke; the water cooling device 4 is provided with an observation door 46 for observing the combustion of fuel.

[0038] Among them, the height of the first membrane wall side tube group 424 is smaller than that of the second membrane wall side tube group 434, the first lower header 426 is "U"-shaped and the opening is set downward, and the opening is a connecting port 41; the second membrane wall side tube group 434 is provided with a smoke outlet 4341, and the smoke outlet 4341 is connected to the heat exchange device 5.

[0039] In one embodiment, the heat exchange device 5 includes an inlet smoke box 51, a circulation component and an outlet smoke box 52, which are connected in sequence, wherein the circulation component includes a first return smoke pipe 53, a second return smoke pipe 54 and a turning smoke chamber 55, one end of the first return smoke pipe 53 is connected to the inlet smoke box 51, and the other end is connected to the turning smoke chamber 55; one end of the second return smoke pipe 54 is connected to the turning smoke chamber 55, and the other end is connected to the outlet smoke box 52; the first return smoke pipe 53 and the second return smoke pipe 54 increase the travel of the smoke, so that the smoke and the smoke pipe can fully exchange heat.

[0040] Among them, the turning smoke chamber 55 is located at the lower part of the heat exchange device 5, and the turning smoke chamber 55 is provided with a dust cleaning door 551, which is convenient for operators to clean the accumulated dust falling from the smoke pipe; the outlet smoke box 52 is located at the upper part of the heat exchange device 5, which is convenient for connecting other equipment.

[0041] In one embodiment, the bundled straw direct-fired modular quick-install boiler is further provided with a burnout fan 7, which is arranged above the first lower header 426 and spaced apart from the first lower header 426 to provide combustion-supporting air for the combustion of volatiles. The high-temperature flue gas generated by the straw combustion enters the inlet smoke box 51 through the smoke outlet 4341 of the second water-cooling part 43 after heat exchange through the water cooling device 4, and then passes through the first return smoke pipe 53 and the second return smoke pipe 54 and is discharged from the outlet smoke box 52 after heat exchange.

[0042] The combustion process of the straw bale is as follows: the fuel is delivered to the feed port 21 of the silo 2 by the feeding device, and after entering the silo 2, it naturally falls onto the bale breaking roller 321 of the bale breaking device 32 to burn, the reducer drives the bale breaking roller 321 to rotate, and the hollow spikes 3211 tear the straw bale, and at the same time, the high-pressure wind output by the blower 324 and the bellows 326 enters the heat collecting air distribution pipe 322, and the high-temperature and high-pressure wind formed after heat exchange is ejected from the first air outlet 3212 and the second air outlet 3222 respectively; the high-temperature and high-pressure wind is ejected from the second air outlet 3222 and sprayed onto the straw bale, causing physical impact and cutting effect on it, creating a local high-temperature environment, making the straw easier to be broken up, and drying it while playing a role in combustion.

[0043] The scattered and ignited straw fuel falls and is ignited again by the high-temperature and high-pressure wind ejected from the first air outlet 3212, and burns violently; the straw fuel that has not been completely burned after being dried and assisted by two high-temperature and high-pressure air distribution processes falls onto the grate 1 and continues to burn under the action of the grate wind; at the same time, the concrete on the side walls of the combustion chamber 3 has heat storage capacity, which provides favorable conditions for creating a continuous high-temperature environment, so that the entire bag breaking process is always in a high-temperature environment, reducing the difficulty of bag breaking while consuming most of the fuel. The volatile matter and unburned straw fuel precipitated in this process enter the water cooling device 4 through the connecting arch 6 under the action of the blower 324 and the grate 1 respectively and continue to burn.

[0044] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A bundled straw direct-fired modular quick-install boiler, partly arranged above a grate (1), characterized in that: include: Silo (2); A combustion chamber (3) located below the silo (2); A water cooling device (4), the water cooling device (4) and the silo (2) are arranged along the length direction of the grate (1) and connected to the combustion chamber (3); A heat exchange device (5) is connected to the water cooling device (4) and is located on a side of the water cooling device (4) away from the silo (2).

2. The bale straw direct-fired modular quick-install boiler according to claim 1 is characterized in that: A fire outlet (31) is provided on a side of the combustion chamber (3) close to the water cooling device (4), and a connecting port (41) is provided on a side of the water cooling device (4) close to the combustion chamber (3). The fire outlet (31) and the connecting port (41) are connected via a connecting arch (6), and the connecting arch (6) is located outside the silo (2).

3. The bale straw direct-fired modular quick-install boiler according to claim 1 is characterized in that: The water cooling device (4) comprises a first water cooling part (42) and a second water cooling part (43), and the first water cooling part (42) and the second water cooling part (43) are connected.

4. The bale straw direct-fired modular quick-install boiler according to claim 3 is characterized in that: The first water-cooling part (42) comprises a first boiler drum (421), a first membrane wall tube group (422) and a first header (423); one end of the first membrane wall tube group (422) is connected to the first boiler drum (421), and the other end is connected to the first header (423); the first membrane wall tube group (422) is provided with at least two groups, and the first membrane wall tube groups (422) are arranged at intervals.

5. The bale straw direct-fired modular quick-install boiler according to claim 4 is characterized in that: The first water-cooling part (42) further comprises a first membrane wall side tube group (424), a first upper header (425) and a first lower header (426); the first membrane wall side tube group (424) is arranged on a side of the first membrane wall tube group (422) close to the combustion chamber (3), and is surrounded by the first membrane wall tube group (422) to form a first furnace; the top end of the first membrane wall side tube group (424) is connected to the first upper header (425), the first upper header (425) is connected to the first boiler drum (421), the bottom end of the first membrane wall side tube group (424) is connected to the first lower header (426), and the first lower header (426) is connected to the first header (423).

6. The bale straw direct-fired modular quick-install boiler according to claim 5, characterized in that: The second water-cooling part (43) comprises a second boiler drum (431), a second membrane wall tube group (432) and a second header (433); one end of the second membrane wall tube group (432) is connected to the second boiler drum (431), and the other end is connected to the second header (433); the second membrane wall tube group (432) is provided with at least two groups, and each second membrane wall tube group (432) is arranged at intervals.

7. The bale straw direct-fired modular quick-install boiler according to claim 6, characterized in that: The second water-cooling part (43) further comprises a second membrane wall side tube group (434), a second upper header (435) and a second lower header (436); the second membrane wall side tube group (434) is arranged on a side of the second membrane wall tube group (432) close to the heat exchange device (5), and is surrounded by the second membrane wall tube group (432) to form a second furnace; the top end of the second membrane wall side tube group (434) is connected to the second upper header (435), the second upper header (435) is connected to the second boiler drum (431), the bottom end of the second membrane wall side tube group (434) is connected to the second lower header (436), and the second lower header (436) is connected to the second header (433).

8. The bundled straw direct-fired modular quick-install boiler according to claim 6, characterized in that: The water cooling device (4) further comprises a first connecting water box (44) and a second connecting water box (45), wherein the first connecting water box (44) is connected to the first boiler drum (421) and the second boiler drum (431), and the second connecting water box (45) is connected to the first header box (423) and the second header box (433).

9. The bale straw direct-fired modular quick-install boiler according to claim 7, characterized in that: The height of the first membrane wall side tube group (424) is smaller than that of the second membrane wall side tube group (434); the first lower header (426) is U-shaped and has an opening facing downward, the opening being the connecting port (41); and the second membrane wall side tube group (434) is provided with a smoke outlet (4341).

10. The bundled straw direct-fired modular quick-install boiler according to claim 1, characterized in that: A plurality of bag breaking devices (32) are provided in the combustion chamber (3), each bag breaking device (32) comprising a bag breaking roller (321) and a heat collecting air distribution pipe (322), the heat collecting air distribution pipe (322) comprising a vertical portion and a horizontal portion, the vertical portion being connected to one end of the bag breaking roller (321) and the other end being connected to the horizontal portion, the horizontal portion and the bag breaking roller (321) being parallel and spaced apart.

11. The bundled straw direct-fired modular quick-install boiler according to claim 10, characterized in that: The bag breaking rotating roller (321) is hollow, and an outer side wall of the bag breaking rotating roller (321) extends to form a plurality of hollow spikes (3211), each of the hollow spikes (3211) is connected to the bag breaking rotating roller (321), and each of the hollow spikes (3211) is provided with a first air outlet (3212).

12. The bundled straw direct-fired modular quick-install boiler according to claim 10, characterized in that: The outer side wall of the horizontal portion extends to form a plurality of hollow short tubes (3221), each of the hollow short tubes (3221) is connected to the horizontal portion, and each of the hollow short tubes (3221) is provided with a second air outlet (3222).

13. The bundled straw direct-fired modular quick-install boiler according to claim 10, characterized in that: The bag breaking device (32) further comprises a driving member (323) and a blower (324); the driving member (323) is connected to one end of the bag breaking roller (321) away from the heat collecting air distribution pipe (322); and the blower (324) is connected to one end of the heat collecting air distribution pipe (322) away from the bag breaking roller (321).

14. The bundled straw direct-fired modular quick-install boiler according to claim 1, characterized in that: The heat exchange device (5) is arranged on the ground, and comprises: an inlet smoke box (51), a circulation component and an outlet smoke box (52); one end of the circulation component is connected to the inlet smoke box (51), and the other end is connected to the outlet smoke box (52); the inlet smoke box (51) is connected to the smoke outlet (4341) of the water cooling device (4).

15. The bundled straw direct-fired modular quick-install boiler according to claim 14, characterized in that: The circulation assembly comprises a first return smoke pipe (53), a second return smoke pipe (54) and a turning smoke chamber (55); one end of the first return smoke pipe (53) is connected to the inlet smoke box (51), and the other end is connected to the turning smoke chamber (55); one end of the second return smoke pipe (54) is connected to the turning smoke chamber (55), and the other end is connected to the outlet smoke box (52).

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