Flexible tube stack structure used in biomass boiler

Abstract

The utility model relates to the technical field of biomass boilers, in particular to a flexible pipe set structure used in a biomass boiler. The device comprises a high-position flexible pipe group and a low-position flexible pipe group, the two free ends of the high-position flexible pipe set are connected and communicated with the feeding port lower collecting box and the vibration fire grate outlet collecting box respectively, and the two free ends of the low-position flexible pipe set are connected and communicated with the vibration fire grate inlet collecting box and the hearth bottom collecting box respectively. The high-position flexible pipe set and the low-position flexible pipe set are oppositely bent, the inner angle of the high-position flexible pipe set and the inner angle of the low-position flexible pipe set are oppositely arranged, and the high-position flexible pipe set and the low-position flexible pipe set can vibrate along with vibration of the vibration fire grate. Due to the fact that the high-end flexible pipe set and the low-end flexible pipe set are arranged in the back-to-back bending mode, the length of the high-end flexible pipe set and the length of the low-end flexible pipe set can be prolonged, vibration generated by the vibration fire grate is transmitted in a long distance, the damage rate and the maintenance rate of the biomass boiler are reduced, and production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of biomass boilers, in particular to a flexible pipe group structure used in a biomass boiler. Background Art

[0002] Biomass boiler is a type of boiler. The boiler that uses biomass energy as fuel is called a biomass boiler. It is divided into biomass steam boiler, biomass hot water boiler, biomass hot air furnace, biomass thermal oil furnace, vertical biomass boiler, horizontal biomass boiler, etc.

[0003] The boiler uses the most suitable combustion equipment for biomass fuel combustion, namely the vibrating grate. The boiler has a larger furnace space than traditional boilers in terms of structural design, and a very reasonable secondary air arrangement, which is conducive to the full combustion of a large amount of volatiles that are instantly released when the biomass fuel is burned. The vibrating grate continuously moves the fuel through mechanical vibration, so that it burns evenly in the furnace, and uses gravity to settle the combustion products such as slag to the bottom of the furnace, thereby realizing the process of continuous feeding and ash discharge.

[0004] Due to the combustion characteristics of biomass boilers, the vibrating grate needs to be cooled and protected, that is, cooling water is added to the vibrating grate, and the cooling water participates in the water circulation of the entire boiler. The vibrating grate and the boiler water-cooled wall need to be connected to each other as a whole.

[0005] Most existing biomass boilers use conventional elbows when connected to the vibrating grate, and the reciprocating vibration of the vibrating grate will cause fatigue damage to the conventional elbows. Once the conventional elbow is damaged, the boiler needs to be shut down for maintenance immediately, which increases the damage rate and maintenance rate of the biomass boiler and reduces production efficiency. Utility Model Content

[0006] 1. Technical issues to be resolved

[0007] In view of the above-mentioned shortcomings and deficiencies of the prior art, the utility model provides a flexible pipe group structure for a biomass boiler, which solves the technical problem that most existing biomass boilers use conventional elbows when connected and communicated with the vibrating grate, and the conventional elbows will be fatigued and damaged under the reciprocating vibration of the vibrating grate. Once the conventional elbow is damaged, the boiler needs to be stopped immediately for maintenance, which increases the damage rate and maintenance rate of the biomass boiler and reduces the production efficiency.

[0008] (II) Technical solution

[0009] In order to achieve the above-mentioned purpose, the main technical solutions adopted by the utility model include:

[0010] The utility model provides a flexible pipe group structure for a biomass boiler, the biomass boiler comprises a feed port lower header, a vibration grate outlet header, a vibration grate inlet header, a vibration grate whose two ends are respectively connected and communicated with the vibration grate outlet header and the vibration grate inlet header, and a furnace bottom header, the flexible pipe group structure comprises a high-position flexible pipe group and a low-position flexible pipe group; the two free ends of the high-position flexible pipe group are respectively connected and communicated with the feed port lower header and the vibration grate outlet header, and the two free ends of the low-position flexible pipe group are respectively connected and communicated with the vibration grate inlet header and the furnace bottom header; the high-position flexible pipe group and the low-position flexible pipe group are bent and arranged in opposite directions, and the inner angles of the high-position flexible pipe group and the low-position flexible pipe group are arranged in opposite directions, and the high-position flexible pipe group and the low-position flexible pipe group can both vibrate with the vibration of the vibration grate.

[0011] Preferably, the high-position flexible tube group includes a first flexible tube group and a second flexible tube group; there is a gap between the first flexible tube group and the second flexible tube group, and the distance between the bending position of the first flexible tube group and the lower header of the feeding port is smaller than the distance between the second flexible tube group and the lower header of the feeding port.

[0012] Preferably, the first flexible tube group and the second flexible tube group are arranged crosswise, and the water inlets and water outlets of the first flexible tube group and the second flexible tube group are located in the same plane and are parallel to each other.

[0013] Preferably, the projections of the first flexible tube group and the second flexible tube group on their vertical side surfaces are both laterally arranged "n" shapes, the openings of the "n" shapes face the lower header of the feeding port, and the projections of the first flexible tube group and the second flexible tube group on their vertical front surfaces are both inverted first "Z" shapes; there is a gap between the middle edge of the "n" shape of the first flexible tube group and the middle edge of the "n" shape of the second flexible tube group, the distance between the middle edge of the "n" shape of the first flexible tube group and the lower header of the feeding port is smaller than the distance between the second flexible tube group and the lower header of the feeding port, and the two sides of the "n" shapes of the first flexible tube group and the second flexible tube group are located in the same plane and are parallel to each other.

[0014] Preferably, the three sides of the "n" shape have an angle with the horizontal plane, and the three sides of the "n" shape are inclined obliquely downward.

[0015] Preferably, the low-position flexible tube group includes a third flexible tube group, a fourth flexible tube group and a fifth flexible tube group; both ends of the third flexible tube group, the fourth flexible tube group and the fifth flexible tube group are respectively connected and communicated with the vibration grate inlet header and the furnace bottom header; the distance between the third flexible tube group and the vibration grate outlet header is smaller than the distance between the fourth flexible tube group and the vibration grate outlet header, and there is a gap between the fourth flexible tube group and the third flexible tube group; the distance between the fifth flexible tube group and the vibration grate outlet header is larger than the distance between the fourth flexible tube group and the vibration grate outlet header, and the middle part of the fifth flexible tube group bypasses the fourth flexible tube group and is located on the side of the fourth flexible tube group away from the third flexible tube group, and there is a gap between the fifth flexible tube group and the fourth flexible tube group.

[0016] Preferably, the projections of the third flexible tube group, the fourth flexible tube group and the fifth flexible tube group on their vertical front faces are all "<" shapes, the projections of the third flexible tube group and the fourth flexible tube group on their vertical sides are all inverted "L" shapes, and the projection of the fifth flexible tube group on its vertical side faces is an inverted second "Z" shape.

[0017] Preferably, both sides of the "L" shape have an angle with the horizontal plane, and both three sides of the second "Z" shape have an angle with the horizontal plane. Both sides of the "L" shape and the three sides of the second "Z" shape are inclined downward.

[0018] Preferably, the first flexible tube group, the second flexible tube group, the third flexible tube group, the fourth flexible tube group and the fifth flexible tube group each include a plurality of flexible tubes, and the number of the plurality of flexible tubes is proportional to the number of the vibrating grate.

[0019] Preferably, it further comprises an upper header for the feeding port; the upper header for the feeding port is located above the lower header for the feeding port and is connected and communicated with the lower header for the feeding port.

[0020] (III) Beneficial effects

[0021] The beneficial effects of the utility model are:

[0022] 1. The utility model discloses a flexible pipe group structure for use in a biomass boiler. A high-position flexible pipe group and a low-position flexible pipe group are provided to respectively connect the lower header of the feed port and the vibrating grate, as well as the inlet header of the vibrating grate and the bottom header of the furnace. Moreover, the flexible pipe has the advantages of flame resistance, corrosion resistance, water resistance, aging resistance, good flexibility, and a firm structure. The high temperature generated during the combustion of biomass will cause the equipment to expand. The high-position flexible pipe group and the low-position flexible pipe group can effectively absorb the stress caused by the thermal expansion of the furnace body, reduce equipment damage caused by concentrated thermal stress, and extend the service life of the boiler and its components. Furthermore, by bending the high-end flexible pipe group and the low-end flexible pipe group in opposite directions, the lengths of the high-end flexible pipe group and the low-end flexible pipe group can be extended, so that the vibration generated by the vibrating grate can be transmitted over a long distance, and then the high-end flexible pipe group and the low-end flexible pipe group can absorb the vibration of the vibrating grate, thereby preventing the vibrating grate from transmitting the vibration to the furnace wall, avoiding damage to the furnace wall, reducing the damage rate and maintenance rate of the biomass boiler, and improving production efficiency.

[0023] 2. The utility model provides a flexible tube group structure for a biomass boiler. By providing a first flexible tube group and a second flexible tube group, and providing a gap between the first flexible tube group and the second flexible tube group, the first flexible tube group and the second flexible tube group can avoid collision between the first flexible tube group and the second flexible tube group when the first flexible tube group and the second flexible tube group vibrate with the vibration of the vibrating grate, thereby avoiding damage to the first flexible tube group and the second flexible tube group, and reducing the damage rate. By cross-arranging the first flexible tube group and the second flexible tube group, the utilization rate in the boiler can be fully improved, thereby making the connection structure more compact and reducing costs.

[0024] 3. A flexible tube group structure used in a biomass boiler of the utility model can extend the length of the first flexible tube group and the second flexible tube group by setting the projections of the first flexible tube group and the second flexible tube group on their vertical side to be "n"-shaped and the projections on their vertical front to be the first "Z"-shaped, so that the vibration grate can extend the vibration time when transmitting the vibration to the first flexible tube group and the second flexible tube group, so that the first flexible tube group and the second flexible tube group gradually absorb the vibration. Moreover, by providing a gap between the middle side of the "n"-shaped of the first flexible tube group and the middle side of the "n"-shaped of the second flexible tube group, it can avoid collision between the two and avoid damage. By providing an angle between the three sides of the "n"-shaped and the horizontal plane, and the three sides of the "n"-shaped are all inclined downward, it can avoid the accumulation of bubbles in the water flow of the first flexible tube group and the second flexible tube group, so as to avoid the reduction of boiler efficiency, thereby avoiding boiler explosion and improving safety.

[0025] 4. The utility model provides a flexible tube group structure for use in a biomass boiler. The third flexible tube group, the fourth flexible tube group and the fifth flexible tube group are arranged, and the three form three layers, namely, inner, middle and outer layers, so as to improve the utilization rate of the space in the furnace and maximize the utilization of the space in the furnace. There is a gap between two adjacent layers, which can avoid collision and damage between the three. By setting the projections of the third flexible tube group, the fourth flexible tube group and the fifth flexible tube group on their vertical front faces to be "<" shapes, the projections of the third flexible tube group and the fourth flexible tube group on their vertical side faces to be inverted "L" shapes, and the projections of the fifth flexible tube group on their vertical side faces to be inverted second "Z" shapes, the lengths of the three can be extended, and the axial direction of the tube group can be further extended to maintain a large angle with the vibration vector, so that when the vibration generated by the vibrating grate is transmitted to the third flexible tube group, the fourth flexible tube group and the fifth flexible tube group respectively, the vibration time can be extended so that the three can absorb the vibration, which is more conducive to amplitude absorption.

[0026] 5. The utility model provides a flexible tube group structure for use in a biomass boiler. By making the two sides of the "L" shape have an angle with the horizontal plane, the three sides of the second "Z" shape have an angle with the horizontal plane, and the two sides of the "L" shape and the three sides of the second "Z" shape are all inclined downward, it can avoid the water flow in the third flexible tube group, the fourth flexible tube group and the fifth flexible tube group from generating bubbles, thereby avoiding the boiler efficiency from being reduced, avoiding the boiler from exploding and causing danger, and improving safety. By making the number of multiple flexible tubes proportional to the number of vibrating grates, it can match the connection of the vibrating grate, that is, one of the flexible tubes in the high-position flexible tube group and the low-position flexible tube group corresponds to the two ends of a grate sheet in the vibrating grate, so that the corresponding two flexible tubes can not only facilitate the circulation of water flow, but also absorb the vibration of the corresponding grate sheet at the same time, so that the vibration absorption efficiency is higher.

[0027] 6. The utility model provides a flexible pipe group structure for use in a biomass boiler. By providing an upper header at the feed port, a closed fuel supply circulation system can be formed, thereby ensuring that the biomass fuel can be evenly and stably supplied before entering the furnace, preventing fuel supply interruption or accumulation, and improving the reliability and efficiency of boiler operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a flexible tube group structure used in a biomass boiler according to the utility model;

[0029] Figure 2 This is a schematic diagram of the overall three-dimensional structure of a flexible pipe group structure used in a biomass boiler of the utility model from another perspective

[0030] Figure 3This is a schematic diagram of the overall front structure of a flexible tube group structure used in a biomass boiler according to the utility model;

[0031] Figure 4 The utility model is a schematic diagram of the overall side structure of a flexible tube group structure used in a biomass boiler.

[0032] [Description of Reference Numerals]

[0033] 1: upper header at the feeding port; 2: lower header at the feeding port; 3: vibrating grate outlet header; 4: vibrating grate inlet header; 5: vibrating grate; 6: furnace bottom header; 7: high-position flexible pipe group; 71: first flexible pipe group; 72: second flexible pipe group; 8: low-position flexible pipe group; 81: third flexible pipe group; 82: fourth flexible pipe group; 83: fifth flexible pipe group; 9: flexible pipe. DETAILED DESCRIPTION

[0034] In order to better understand the above technical solution, exemplary embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0035] Embodiment 1

[0036] like Figure 1-Figure 4 As shown, a flexible pipe 9 group structure for a biomass boiler in this embodiment, the biomass boiler includes a feed port lower header 2, a vibration grate outlet header 3, a vibration grate inlet header 4, a vibration grate 5 connected and communicated with the vibration grate outlet header 3 and the vibration grate inlet header 4 at both ends, and a furnace bottom header 6, and the flexible pipe 9 group structure includes a high-position flexible pipe group 7 and a low-position flexible pipe group 8. Preferably, it also includes a feed port upper header 1. The feed port upper header 1 is located above the feed port lower header 2 and is connected and communicated with the feed port lower header 2. The feed port upper header 1 can form a closed fuel supply circulation system, ensuring that the biomass fuel can be evenly and stably supplied before entering the furnace, preventing fuel supply interruption or accumulation, and improving the reliability and efficiency of boiler operation.

[0037] Specifically, the two free ends of the high-position flexible pipe group 7 are respectively connected and communicated with the feed port lower header 2 and the vibration grate outlet header 3, and the two free ends of the low-position flexible pipe group 8 are respectively connected and communicated with the vibration grate inlet header 4 and the furnace bottom header 6. The high-position flexible pipe group 7 and the low-position flexible pipe group 8 are bent and arranged in opposite directions, and the inner angles of the high-position flexible pipe group 7 and the low-position flexible pipe group 8 are arranged in opposite directions, and both the high-position flexible pipe group 7 and the low-position flexible pipe group 8 can vibrate with the vibration of the vibration grate 5. By setting a high-position flexible pipe group 7 and a low-position flexible pipe group 8, the lower header 2 of the feed port and the vibrating grate outlet header 3 as well as the vibrating grate inlet header 4 and the furnace bottom header 6 are connected respectively. In addition, the flexible pipe 9 has the advantages of flame resistance, corrosion resistance, water resistance, aging resistance, good flexibility and firm structure. The high temperature generated during the combustion of biomass will cause the equipment to expand. The high-position flexible pipe group 7 and the low-position flexible pipe group 8 can effectively absorb the stress caused by the thermal expansion of the furnace body, reduce equipment damage caused by concentrated thermal stress, and extend the service life of the boiler and its components. Furthermore, by bending the high-end flexible pipe group 7 and the low-end flexible pipe group 8 in opposite directions, the lengths of the high-end flexible pipe group 7 and the low-end flexible pipe group 8 can be extended, so that the vibration generated by the vibrating grate 5 can be transmitted over a long distance, and the high-end flexible pipe group 7 and the low-end flexible pipe group 8 can absorb the vibration of the vibrating grate 5, thereby preventing the vibrating grate 5 from transmitting the vibration to the furnace wall, avoiding damage to the furnace wall, reducing the damage rate and maintenance rate of the biomass boiler, and improving production efficiency.

[0038] Among them, the upper header 1 of the feed port is used to collect hot water or steam returned from the water-cooled wall or other heating surface around the furnace, and then guide this part of the medium to other parts for further heating or circulation. This header helps to maintain the stability of the water circulation and ensure that the heating surface is evenly cooled. The lower header 2 of the feed port corresponds to the upper header 1 of the feed port, and is used to receive water from the upper header 1 of the feed port or directly from the lower part of the boiler, and then distribute it to the water-cooled wall tubes or other heating surfaces above, promoting the continuous circulation of water and the effective transfer of heat. The vibrating grate outlet header 3 is responsible for collecting hot water or steam that passes through the grate area and absorbs a large amount of heat. The vibrating grate inlet header 4 is used to supply cooling water or preheated water to the vibrating grate 5 area, providing the necessary cooling and heat exchange initial conditions for the vibrating grate 5 and the fuel combustion process, ensuring that the temperature of the combustion area is controlled within a safe range, and preventing the grate from being overheated and damaged. The vibrating grate 5 is a key component for fuel combustion in biomass or other solid fuel boilers. It uses mechanical vibration to evenly distribute the fuel on the bed and move it forward to achieve continuous and stable combustion. It also includes a water cooling structure, which uses circulating water to flow through the inside of the vibrating grate 5 to absorb the heat generated by combustion and cool the vibrating grate 5, thereby improving combustion efficiency and safety. The furnace bottom header 6 is used to collect hot water or steam at the bottom of the furnace, which helps to maintain the structural stability of the furnace bottom, prevent overheating, and promote the effective recovery of heat energy.

[0039] Further, the high-position flexible pipe group 7 includes a first flexible pipe group 71 and a second flexible pipe group 72. There is a gap between the first flexible pipe group 71 and the second flexible pipe group 72, and the distance between the bending position of the first flexible pipe group 71 and the feed port lower header 2 is smaller than the distance between the second flexible pipe group 72 and the feed port lower header 2.

[0040] Preferably, the first flexible tube group 71 and the second flexible tube group 72 are cross-arranged, and the water inlets and outlets of the first flexible tube group 71 and the second flexible tube group 72 are located in the same plane and parallel to each other.

[0041] Furthermore, the projections of the first flexible tube group 71 and the second flexible tube group 72 on their vertical sides are both laterally arranged "n" shapes, and the openings of the "n" shapes face the feed port lower header 2. The projections of the first flexible tube group 71 and the second flexible tube group 72 on their vertical front sides are both inverted first "Z" shapes, which can extend the lengths of the first flexible tube group 71 and the second flexible tube group 72, so that when the vibrating grate 5 transmits vibration to the first flexible tube group 71 and the second flexible tube group 72, the vibration time is extended, so that the first flexible tube group 71 and the second flexible tube group 72 gradually absorb the vibration. There is a gap between the middle side of the "n" shape of the first flexible tube group 71 and the middle side of the "n" shape of the second flexible tube group 72. The distance between the middle side of the "n" shape of the first flexible tube group 71 and the lower header 2 of the feeding port is smaller than the distance between the second flexible tube group 72 and the lower header 2 of the feeding port. The two sides of the "n" shape of the first flexible tube group 71 and the second flexible tube group 72 are located in the same plane and are parallel to each other, which can avoid collision between the two and avoid damage.

[0042] Furthermore, the three sides of the "n" shape have an angle with the horizontal plane, and the three sides of the "n" shape are inclined downward, which can prevent bubbles from accumulating in the water flow in the first flexible tube group 71 and the second flexible tube group 72, so as to avoid a reduction in the efficiency of the boiler, thereby avoiding an explosion of the boiler and improving safety.

[0043] Furthermore, the low-position flexible tube group 8 includes a third flexible tube group 81 , a fourth flexible tube group 82 and a fifth flexible tube group 83 .

[0044] Specifically, the two ends of the third flexible tube group 81, the fourth flexible tube group 82 and the fifth flexible tube group 83 are connected and communicated with the vibration grate inlet header 4 and the furnace bottom header 6 respectively. The distance between the third flexible tube group 81 and the vibration grate outlet header 3 is smaller than the distance between the fourth flexible tube group 82 and the vibration grate outlet header 3, and there is a gap between the fourth flexible tube group 82 and the third flexible tube group 81. The distance between the fifth flexible tube group 83 and the vibration grate outlet header 3 is greater than the distance between the fourth flexible tube group 82 and the vibration grate outlet header 3, and the middle part of the fifth flexible tube group 83 bypasses the fourth flexible tube group 82 and is located on the side of the fourth flexible tube group 82 away from the third flexible tube group 81, and there is a gap between the fifth flexible tube group 83 and the fourth flexible tube group 82. By setting the third flexible tube group 81, the fourth flexible tube group 82 and the fifth flexible tube group 83, and forming three layers of inner, middle and outer layers, the utilization rate of the furnace space can be improved and the furnace space can be used to the maximum extent. There is a gap between two adjacent layers, which can avoid collision and damage between the three. In addition, since the third flexible tube group 81, the fourth flexible tube group 82 and the fifth flexible tube group 83 are located below the vibrating grate 5, they can avoid the slag falling area of ​​the vibrating grate 5.

[0045] Furthermore, the projections of the third flexible tube group 81, the fourth flexible tube group 82 and the fifth flexible tube group 83 on their vertical front faces are all in the shape of "<", the projections of the third flexible tube group 81 and the fourth flexible tube group 82 on their vertical sides are all in the shape of an inverted "L", and the projection of the fifth flexible tube group 83 on its vertical side faces is in the shape of an inverted second "Z". This allows the third flexible tube group 81, the fourth flexible tube group 82 and the fifth flexible tube group 83 to extend their lengths, further extending the tube group axis to maintain a large angle with the vibration vector, so that when the vibration generated by the vibrating grate 5 is transmitted to the third flexible tube group 81, the fourth flexible tube group 82 and the fifth flexible tube group 83 respectively, the vibration time can be extended so that the three can absorb the vibration, which is more conducive to amplitude absorption.

[0046] Furthermore, both sides of the "L" shape have an angle with the horizontal plane, and both sides of the second "Z" shape have an angle with the horizontal plane. Both sides of the "L" shape and the three sides of the second "Z" shape are arranged to be tilted downward. It can prevent the water flow in the third flexible tube group 81, the fourth flexible tube group 82 and the fifth flexible tube group 83 from generating bubbles, thereby preventing the boiler from decreasing in efficiency, preventing the boiler from exploding and causing danger, and improving safety. Preferably, the short sides of the "L" shapes of the third flexible tube group 81 and the fourth flexible tube group 82 are parallel to each other, and the "<" shapes of the third flexible tube group 81 and the fourth flexible tube group 82 intersect each other in their vertical front projections, but the "<" shapes of the third flexible tube group 81 and the fourth flexible tube group 82 are spaced apart in space to prevent interference between the two.

[0047] Furthermore, the first flexible tube group 71, the second flexible tube group 72, the third flexible tube group 81, the fourth flexible tube group 82 and the fifth flexible tube group 83 all include multiple flexible tubes 9, and the number of the multiple flexible tubes 9 is proportional to the number of plates of the vibration grate 5, which can match the connection of the vibration grate 5, that is, one flexible tube 9 in the high-position flexible tube group 7 and the low-position flexible tube group 8 corresponds to the two ends of a grate plate in the vibration grate 5, so that the corresponding two flexible tubes 9 can not only facilitate the circulation of water flow, but also absorb the vibration of the corresponding grate plate at the same time, so that the vibration absorption efficiency is higher.

[0048] In the description of the present utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0049] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like 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 an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In the present utility model, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0051] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0052] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A flexible pipe group structure for a biomass boiler, the biomass boiler comprising a feed port lower header (2), a vibration grate outlet header (3), a vibration grate inlet header (4), a vibration grate (5) whose two ends are respectively connected and communicated with the vibration grate outlet header (3) and the vibration grate inlet header (4), and a furnace bottom header (6), characterized in that: The flexible pipe group structure comprises a high-position flexible pipe group (7) and a low-position flexible pipe group (8); The two free ends of the high-position flexible pipe group (7) are respectively connected to and communicated with the feed port lower header (2) and the vibration grate outlet header (3), and the two free ends of the low-position flexible pipe group (8) are respectively connected to and communicated with the vibration grate inlet header (4) and the furnace bottom header (6); The high-position flexible pipe group (7) and the low-position flexible pipe group (8) are bent in opposite directions and the inner angles of the high-position flexible pipe group (7) and the low-position flexible pipe group (8) are arranged in opposite directions. Both the high-position flexible pipe group (7) and the low-position flexible pipe group can vibrate along with the vibration of the vibrating grate (5).

2. A flexible pipe group structure for a biomass boiler according to claim 1, characterized in that: The high-position flexible pipe group (7) comprises a first flexible pipe group (71) and a second flexible pipe group (72); There is a gap between the first flexible tube group (71) and the second flexible tube group (72), and the distance between the bending position of the first flexible tube group (71) and the feed port lower header (2) is smaller than the distance between the second flexible tube group (72) and the feed port lower header (2).

3. A flexible pipe group structure for a biomass boiler according to claim 2, characterized in that: The first flexible tube group (71) and the second flexible tube group (72) are arranged crosswise, and the water inlets and water outlets of the first flexible tube group (71) and the second flexible tube group (72) are located in the same plane and are parallel to each other.

4. A flexible pipe group structure for a biomass boiler as claimed in claim 2, characterized in that: The projections of the first flexible tube group (71) and the second flexible tube group (72) on their vertical side surfaces are both in a transversely arranged "n" shape, the openings of the "n" shape face the feed port lower header (2), and the projections of the first flexible tube group (71) and the second flexible tube group (72) on their vertical front surfaces are both in an inverted first "Z" shape; There is a gap between the middle side of the "n" shape of the first flexible tube group (71) and the middle side of the "n" shape of the second flexible tube group (72); the distance between the middle side of the "n" shape of the first flexible tube group (71) and the lower header box (2) of the feed port is smaller than the distance between the second flexible tube group (72) and the lower header box (2) of the feed port; and the two sides of the "n" shape of the first flexible tube group (71) and the second flexible tube group (72) are located in the same plane and are parallel to each other.

5. A flexible pipe group structure for a biomass boiler as claimed in claim 4, characterized in that: The three sides of the "n" shape have an angle with the horizontal plane, and the three sides of the "n" shape are all inclined downward.

6. A flexible pipe group structure for a biomass boiler as claimed in claim 2, characterized in that: The low-position flexible pipe group (8) comprises a third flexible pipe group (81), a fourth flexible pipe group (82) and a fifth flexible pipe group (83); Two ends of the third flexible tube group (81), the fourth flexible tube group (82) and the fifth flexible tube group (83) are respectively connected to and communicated with the vibrating grate inlet header (4) and the furnace bottom header (6); The distance between the third flexible tube group (81) and the vibration grate discharge outlet header (3) is smaller than the distance between the fourth flexible tube group (82) and the vibration grate discharge outlet header (3), and there is a gap between the fourth flexible tube group (82) and the third flexible tube group (81); The distance between the fifth flexible tube group (83) and the vibration grate discharge outlet header (3) is greater than the distance between the fourth flexible tube group (82) and the vibration grate discharge outlet header (3), and the middle portion of the fifth flexible tube group (83) bypasses the fourth flexible tube group (82) and is located on a side of the fourth flexible tube group (82) away from the third flexible tube group (81), and there is a gap between the fifth flexible tube group (83) and the fourth flexible tube group (82).

7. A flexible tube group structure for a biomass boiler according to claim 6, characterized in that: The projections of the third flexible tube group (81), the fourth flexible tube group (82) and the fifth flexible tube group (83) on their vertical front faces are all in the shape of a "<"; the projections of the third flexible tube group (81) and the fourth flexible tube group (82) on their vertical side faces are all in the shape of an inverted "L"; and the projection of the fifth flexible tube group (83) on its vertical side faces is in the shape of an inverted second "Z" shape.

8. A flexible tube group structure for a biomass boiler according to claim 7, characterized in that: The two sides of the "L" shape have an angle with the horizontal plane, the three sides of the second "Z" shape have an angle with the horizontal plane, and the two sides of the "L" shape and the three sides of the second "Z" shape are all inclined downward.

9. A flexible tube group structure for a biomass boiler according to claim 7, characterized in that: The first flexible tube group (71), the second flexible tube group (72), the third flexible tube group (81), the fourth flexible tube group (82) and the fifth flexible tube group (83) each include a plurality of flexible tubes (9), and the number of the plurality of flexible tubes (9) is proportional to the number of the vibrating grate (5).

10. The flexible pipe group structure for a biomass boiler according to claim 1, characterized in that: It also includes a feed port upper header (1); The feed port upper header (1) is located above the feed port lower header (2) and is connected and communicated with the feed port lower header (2).

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