Biomass powder burner

Abstract

The utility model relates to the technical field of combustors, and discloses a biomass powder combustor which comprises a combustion chamber and a hearth, a feeding port is formed in one end of the combustion chamber, a primary air feeding pipeline and a secondary air pipeline are arranged in the feeding port, a material guiding mechanism is arranged at a discharging port of the primary air feeding pipeline, and a secondary air feeding pipeline is arranged in the secondary air pipeline. The material guiding mechanism comprises a mounting frame and a material guiding part, the material guiding part is fixedly connected with the primary air feeding pipeline through the mounting frame, and the material guiding part is used for diffusing biomass powder at the end, close to the feeding port, in the combustion chamber. According to the utility model, the problems that in the prior art, primary air can blow part of biomass powder to an ash collecting area, so that biomass combusted at the part cannot normally exchange heat with a water cooling pipe, coking is caused, regular cleaning is needed, and manpower and material resources are consumed can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of burners, in particular to a biomass powder burner. Background Art

[0002] At present, due to the requirement of carbon emission reduction, biomass boilers, as typical equipment for carbon emission environmental protection, have been widely used. At present, most biomass boilers require the use of granular combustion materials, and some use powdered biomass materials. The burner used in powdered biomass boilers directly feeds materials with primary air and burns at the outlet of the pipeline. At present, the situation is that the materials cannot be completely burned. Later, a burner with primary air feeding and secondary air supplementary combustion designed according to coal burners is used, and the combustion completeness has been improved. Water-cooled pipes (water-cooled wall pipes) are arranged in biomass boilers to absorb heat, protect the furnace structure, prevent coking, etc.

[0003] The existing biomass boilers in the prior art are as Figure 1 shown, including a furnace 2 and a combustion chamber 1. Water-cooled wall pipes are arranged in both the furnace 2 and the combustion chamber 1. Primary air feeds biomass particles into the combustion chamber 1, and secondary air provides air for the combustion chamber 1 to enhance the combustion effect. During the combustion process, the water-cooled wall pipes in the combustion chamber 1 continuously circulate for heat exchange. The biomass ashes after combustion fall to the ash collection area 8, and the high-temperature gas enters the furnace for heat exchange.

[0004] During the actual use process, the primary air will blow some biomass powder to the ash collection area 8, resulting in the biomass powder burning at this place being unable to exchange heat with the water-cooled pipe normally, leading to coking, which needs to be cleaned regularly, consuming manpower and material resources. Content of the Utility Model

[0005] In view of this, the purpose of the utility model is to provide a biomass powder burner, which solves the problem in the prior art that the primary air will blow some biomass powder to the ash collection area, resulting in the biomass burning at this place being unable to exchange heat with the water-cooled pipe normally, leading to coking, which needs to be cleaned regularly, consuming manpower and material resources.

[0006] The utility model solves the above technical problems through the following technical means:

[0007] A biomass powder burner includes a combustion chamber and a furnace. One end of the combustion chamber is provided with a feed inlet, and a primary air feeding pipeline and a secondary air pipeline are arranged in the feed inlet. A material guiding mechanism is arranged at the discharge port of the primary air feeding pipeline. The material guiding mechanism includes a mounting frame and a material guiding part. The material guiding part is fixedly connected with the primary air feeding pipeline through the mounting frame. The material guiding part is used to make the biomass powder diffuse at one end of the combustion chamber close to the feed inlet.

[0008] Further, the material guiding member is a conical member, the conical member includes a large head end and a small head end, the large head end is fixedly connected to the mounting frame, and the large head end is located at an end away from the primary air feeding pipeline.

[0009] Further, the mounting frame includes a plurality of mounting ears, one end of the mounting ear is fixedly connected to the inner wall of the primary air feeding pipeline, and the other end is fixedly connected to the material guiding member.

[0010] Further, a baffle is provided at an end of the material guiding member away from the primary air feeding pipeline, and the baffle is used to change the flow direction of the biomass powder flowing through the baffle.

[0011] Further, a mounting sleeve is fixedly installed at the feed inlet, the primary air feeding pipeline is fixedly installed in the mounting sleeve, a channel is formed between the inner wall of the mounting sleeve and the outer wall of the primary air feeding pipeline, the channel is communicated with the combustion chamber, an air inlet is provided on the mounting sleeve, the air inlet is communicated with the channel, and the secondary air pipeline is communicated with the air inlet.

[0012] Further, a spiral blade assembly is provided at an end of the channel close to the combustion chamber.

[0013] Further, a viewing window is provided on the end wall of the mounting sleeve away from the combustion chamber.

[0014] Advantages of the utility model:

[0015] 1. By setting the material guiding member, the utility model changes the flow direction of the biomass powder in the primary air feeding pipeline and diffuses the biomass powder, avoiding the situation that some biomass powder is blown to the ash collection area, resulting in the biomass powder burning at this place being unable to exchange heat with the water-cooled pipe normally and causing coking.

[0016] 2. By setting the baffle, the utility model further guides the biomass powder, so that the biomass powder burns at an end close to the feed inlet. Description of the drawings

[0017] Figure 1 is a schematic cross-sectional structure diagram of a biomass powder burner in the prior art;

[0018] Figure 2 is a schematic cross-sectional structure diagram of a biomass powder burner of the utility model;

[0019] Figure 3 is a schematic enlarged cross-sectional structure diagram of the feed inlet of a biomass powder burner of the utility model;

[0020] Figure 4 is a schematic end-face structure diagram of the material guiding mechanism of a biomass powder burner of the utility model;

[0021] Among them,

[0022] 1. Combustion chamber; 11. Feed inlet;

[0023] 2. Furnace;

[0024] 3. Primary air feeding pipeline; 31. Discharge outlet;

[0025] 4. Secondary air pipeline;

[0026] 5. Installation sleeve; 51. Channel; 52. Air inlet; 53. Fire viewing window;

[0027] 6. Spiral blade assembly;

[0028] 71. Installation frame; 72. Material guiding part; 73. Baffle;

[0029] 8. Ash collection area. Specific implementation mode

[0030] The following describes the implementation mode of the present utility model through specific specific examples. Those skilled in the art can understand the advantages and effects of the present utility model from the content disclosed in this specification. It should be noted that the drawings provided in the following examples are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and should not be construed as a limitation to the present utility model. In order to better illustrate the embodiments of the present utility model, some components in the drawings will be omitted, enlarged or reduced, which do not represent the dimensions of the actual products; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0031] In the drawings of the embodiments of the present utility model, the same or similar reference numerals correspond to the same or similar components. In the description of the present utility model, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicating the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the present utility model 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. Therefore, the terms describing the position relationship in the drawings are only for illustrative purposes and should not be construed as a limitation to the present utility model. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0032] Such as Figures 2-4As shown in the figure, a biomass powder burner of the present utility model includes a combustion chamber 1, a furnace 2, a primary air feeding pipeline 3, a secondary air pipeline 4, and a material guiding mechanism. The primary air feeding pipeline 3 feeds biomass powder into the combustion chamber 1 for combustion. The material guiding mechanism is used to spread the biomass powder at one end of the combustion chamber 1 close to the feeding port 11. The secondary air pipeline 4 provides air for the combustion chamber 1 to enhance the combustion effect. During the combustion process, the water-cooled wall tubes of the combustion chamber 1 continuously circulate and exchange heat. The biomass ash after combustion falls to the ash collection area 8, and the high-temperature gas enters the furnace 2 for heat exchange.

[0033] In this embodiment, a feeding port 11 is provided at one end of the combustion chamber 1, and an installation sleeve 5 is fixedly installed at the feeding port 11. In this embodiment, the installation sleeve 5 is fixedly connected to the feeding port 11 of the combustion chamber 1 through a connecting flange and fixing bolts. The primary air feeding pipeline 3 is fixedly installed inside the installation sleeve 5. A channel 51 is formed between the inner wall of the installation sleeve 5 and the outer wall of the primary air feeding pipeline 3. The channel 51 communicates with the combustion chamber 1. An air inlet 52 is provided on the installation sleeve 5, and the air inlet 52 communicates with the channel 51. The secondary air pipeline 4 communicates with the air inlet 52. The secondary air pipeline 4 provides air for the combustion chamber 1 through the air inlet 52 and the channel 51.

[0034] In this embodiment, a spiral blade assembly 6 is provided at one end of the channel 51 close to the combustion chamber 1. The air provided by the secondary air pipeline 4 enters the combustion chamber 1 in a swirling manner, disturbing the air flow in the combustion chamber 1, thereby reducing the loss of incomplete combustion of the biomass powder. The spiral blade assembly 6 has been fully disclosed in the prior art, so it will not be elaborated here.

[0035] In this embodiment, a viewing window 53 is provided on the end wall of the installation sleeve 5 away from the combustion chamber 1. Through the viewing window 53, abnormal situations during the combustion process, such as flame extinction and flashback, can be detected in a timely manner, so as to take corresponding measures to avoid the occurrence of safety accidents.

[0036] In this embodiment, the material guiding mechanism is fixedly arranged at the discharge port 31 of the primary air feeding pipeline 3. The material guiding mechanism includes an installation frame 71 and a material guiding member 72. The material guiding member 72 is fixedly connected to the primary air feeding pipeline 3 through the installation frame 71. The material guiding member 72 is used to spread the biomass powder at one end of the combustion chamber 1 close to the feeding port 11. It changes the flow direction of the biomass powder in the primary air feeding pipeline 3 and spreads the biomass powder, avoiding some biomass powder being blown to the ash collection area 8, which may cause the biomass powder burning at this place to be unable to exchange heat with the water-cooled tube normally, resulting in coking.

[0037] In this embodiment, the material guiding member 72 is a conical member. The conical member includes a large head end and a small head end. The large head end is fixedly connected to the mounting bracket 71, and the large head end is located at one end away from the primary air feeding pipe 3. In some other embodiments, the material guiding member 72 can also be arranged in structures such as a spherical shape or an inclined guide plate. By arranging the conical member in this embodiment, while guiding and diffusing the biomass powder, it also has the advantage of being easy to install.

[0038] In this embodiment, the mounting bracket 71 includes a plurality of mounting ears. The number of mounting ears is set to three. One end of the mounting ear is fixedly connected to the inner wall of the primary air feeding pipe 3, and the other end is fixedly connected to the material guiding member 72. In some other embodiments, the connection between the material guiding member 72 and the primary air feeding pipe 3 can also be realized by arranging a horizontal and vertical cross.

[0039] In this embodiment, a baffle 73 is arranged at one end of the material guiding member 72 away from the primary air feeding pipe 3. The baffle 73 is used to change the flow direction of the biomass powder flowing through the baffle 73. The biomass powder guided by the material guiding member 72 is further guided by the baffle 73, so that the biomass powder diffuses, so that the biomass powder burns at one end close to the feed inlet 11, avoiding the biomass powder being blown into the ash collection area 8, and effectively reducing the coking situation. It should be noted that whether to set the baffle 73 can be selected according to the actual situation to further guide the biomass powder.

[0040] The working principle of the present utility model is as follows:

[0041] The primary air feeding pipe 3 feeds the biomass powder into the combustion chamber 1 for combustion. During the combustion process, the water-cooled wall pipes of the combustion chamber 1 continuously circulate for heat exchange.

[0042] During this process, when the biomass powder collides with the conical member, the conical member changes the flow direction of the biomass powder and diffuses outward along the taper of the conical member. When the outward diffused biomass powder collides with the baffle 73, the direction is changed again by the baffle 73, so that the biomass powder further diffuses along the vertical direction of the baffle 73, so that the biomass powder burns at one end close to the feed inlet 11.

[0043] During this process, the secondary air pipe 4 provides swirling air for the combustion chamber 1 through the spiral blade assembly 6 to enhance the combustion effect.

[0044] Then the biomass ash after combustion falls to the ash collection area 8, and the high-temperature gas enters the furnace 2 for heat exchange.

[0045] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the gist and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention. The technologies, shapes, and structures not described in detail in the present invention are all well-known technologies.

Claims

1. A biomass powder burner, comprising a combustion chamber (1) and a furnace (2). One end of the combustion chamber (1) is provided with a feed inlet (11). A primary air feeding pipeline (3) and a secondary air pipeline (4) are arranged in the feed inlet (11), and it is characterized in that: A material guiding mechanism is provided at the discharge port (31) of the primary air feeding pipeline (3). The material guiding mechanism includes a mounting frame (71) and a material guiding member (72). The material guiding member (72) is fixedly connected to the primary air feeding pipeline (3) through the mounting frame (71). The material guiding member (72) is used to spread the biomass powder near one end of the feeding port (11) in the combustion chamber (1).

2. The biomass powder burner according to claim 1, characterized in that: The material guiding member (72) is a conical member. The conical member includes a large head end and a small head end. The large head end is fixedly connected to the mounting frame (71). The large head end is located at the end far from the primary air feeding pipeline (3).

3. The biomass powder burner according to claim 1 or 2, characterized in that: The mounting frame (71) includes a plurality of mounting ears. One end of the mounting ear is fixedly connected to the inner wall of the primary air feeding pipeline (3), and the other end is fixedly connected to the material guiding member (72).

4. A biomass powder burner according to claim 1, characterized in that: A baffle (73) is provided at the end of the material guiding member (72) far from the primary air feeding pipeline (3). The baffle (73) is used to change the flow direction of the biomass powder flowing through the baffle (73).

5. A biomass powder burner according to claim 1, characterized in that: A mounting sleeve (5) is fixedly installed at the feeding port (11). The primary air feeding pipeline (3) is fixedly installed in the mounting sleeve (5). A channel (51) is formed between the inner wall of the mounting sleeve (5) and the outer wall of the primary air feeding pipeline (3). The channel (51) communicates with the combustion chamber (1). An air inlet (52) is provided on the mounting sleeve (5). The air inlet (52) communicates with the channel (51). The secondary air pipeline (4) communicates with the air inlet (52).

6. The biomass powder burner according to claim 5, wherein: A spiral blade assembly (6) is provided at one end of the channel (51) close to the combustion chamber (1).

7. A biomass powder burner according to claim 5, characterized in that: An observation window (53) is provided on the end wall of the mounting sleeve (5) far from the combustion chamber (1).

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