Biomass powder suspension combustion device

Abstract

The utility model discloses a biomass powder suspension combustion device which is composed of an ignition mechanism, a combustion mechanism, a feeding mechanism and an air supply mechanism, a discharging port of the feeding mechanism is communicated with a feeding port of the combustion mechanism, the ignition mechanism is arranged at the bottom of the combustion mechanism, and an air supply port of the air supply mechanism is respectively communicated with an air inlet of the combustion mechanism and an air inlet of the ignition mechanism. The ignition mechanism consists of an ignition hearth, an air chamber and an ignition furnace air supply pipe; the combustion mechanism is composed of a combustion cylinder, a shell, a jacket air supply pipe inlet and a rear end wall ring air box. The feeding mechanism consists of a hopper and a spraying nozzle; the air supply mechanism comprises a main air bellow, an air outlet of the main air bellow is communicated with the other end of the rear end wall ring air bellow air supply pipe, the other end of the ignition furnace air supply pipe and the other end of the jacket air supply pipe, and an air inlet of the main air bellow is communicated with an air outlet of an air blower. The biomass feeding device has the advantages that biomass feeding is even, stacking burning is not prone to being caused, burning is sufficient, and burning efficiency is high; 2, smoke pollution cannot be caused;

Description

Technical Field

[0001] The utility model discloses a biomass powder suspension combustion device, belonging to the field of biomass burners. Background Art

[0002] A biomass burner is a biomass semi-gasification automatic control burner, a biomass high-temperature cracking burner using organic biomass such as biomass particles as fuel, generally divided into two models: air-cooled biomass burners and water-cooled biomass burners.

[0003] At present, the combustion method of biomass powder (wood chips, furfural residue, bagasse, rice bran, rice husk, etc.) is to send it into the furnace through a feed pipe by a blower for combustion. However, the above technical solutions have the following deficiencies: uneven feeding, resulting in pile burning, incomplete combustion, and often generating deflagration phenomena, causing soot to fly everywhere. Summary of the Utility Model

[0004] Purpose of the Utility Model: The utility model makes improvements to the above existing problems, that is, the utility model discloses a biomass powder suspension combustion device.

[0005] Technical Solution: A biomass powder suspension combustion device is composed of an ignition mechanism, a combustion mechanism, a feeding mechanism, and a blowing mechanism. The discharge port of the feeding mechanism is communicated with the feeding port of the combustion mechanism. The ignition mechanism is arranged at the bottom of the combustion mechanism. The air outlets of the blowing mechanism are respectively communicated with the air inlets of the combustion mechanism and the air inlet of the ignition mechanism. Among them:

[0006] The ignition mechanism is composed of the following components:

[0007] An ignition furnace chamber, the inner side of which is provided with side walls made of refractory materials. The bottom of the ignition furnace chamber is provided with a refractory grate. The ignition furnace chamber is provided with an ignition furnace chamber door;

[0008] An air chamber is arranged below the refractory grate and is communicated with the ignition furnace chamber. The bottom of the side wall of the air chamber is provided with an ash cleaning door communicated with the outside;

[0009] An ignition furnace air supply pipe, one end of which is communicated with the air chamber;

[0010] The combustion mechanism is composed of the following components:

[0011] A combustion cylinder, the whole of which is in a quasi-cylindrical shape. The outer end of the combustion cylinder is provided with a reduced opening. The outside of the reduced opening is the combustion cylinder outlet. The inner side of the combustion cylinder is provided with a rear end wall. The middle of the rear end wall is provided with a flared opening. Around the flared opening, there are strong air supply pipes arranged in a ring and communicated with the inner cavity of the combustion cylinder;

[0012] A housing is disposed outside the side wall of the combustion cylinder, and a jacket is provided between the housing and the combustion cylinder;

[0013] An air inlet for the jacket air supply pipe is welded to the housing and is in communication with the jacket. The jacket is in communication with the inner cavity of the combustion cylinder through a plurality of tangential swirl pipes at the bottom side of the cavity of the combustion cylinder. One end of the air supply pipe for the jacket is externally connected to the air inlet for the jacket air supply pipe;

[0014] A rear wall ring air box is disposed at the rear side of the rear wall of the combustion cylinder, and the rear wall ring air box is in communication with the strong air supply pipe. One end of the air supply pipe for the rear wall ring air box is externally connected to the rear wall ring air box;

[0015] The feeding mechanism is composed of the following components:

[0016] A hopper, with a discharge port at its bottom;

[0017] A spraying nozzle, with a feed port at its upper part. The discharge port of the hopper is in communication with the feed port of the spraying nozzle. A necking section is provided in the middle of the spraying nozzle, and a straight section is provided at the front end of the spraying nozzle. A spiral blade is welded in the inner cavity of the straight section at the front end of the spraying nozzle, and the straight section at the front end of the spraying nozzle is in communication with the flare nozzle; the inner cavity of the spraying nozzle is in communication with a drainage pipe;

[0018] The air supply mechanism is composed of the following components:

[0019] A main air box, whose air outlet is respectively in communication with the other end of the air supply pipe for the rear wall ring air box, the other end of the air supply pipe for the ignition furnace, and the other end of the air supply pipe for the jacket. The main air inlet of the main air box is in communication with the air outlet of the blower.

[0020] Further, the thickness of the side wall is 12 - 25 cm.

[0021] Further, the straight section at the front end of the spraying nozzle is inserted into the flare nozzle and is fixedly connected to the rear wall 21 by welding.

[0022] Further, the discharge port of the hopper is inserted into the feed port of the spraying nozzle and is fixedly connected by welding.

[0023] Further, the inner cavity of the spraying nozzle is in communication with the drainage pipe and is fixedly connected by welding.

[0024] Further, a bracket is provided at the bottom of the blower.

[0025] Further, the drainage pipe is provided with a drainage pipe air injection port, which is located in the inner cavity of the spraying nozzle, and the end face of the drainage pipe air injection port is at one - half of the width of the discharge port of the hopper vertically downward.

[0026] Further, the main air inlet of the main air box is communicated with the air outlet of the blower by means of bolt connection through a flange.

[0027] Further, a valve is provided on the air supply pipe of the rear wall ring air box.

[0028] Further, a valve is provided on the jacket air supply pipe.

[0029] Further, a valve is provided on the air supply pipe of the ignition furnace.

[0030] Beneficial effects: A biomass powder suspension combustion device disclosed by the present utility model has the following beneficial effects:

[0031] 1. The biomass feeding is uniform, not easily causing piled combustion, with sufficient combustion, and the combustion efficiency can be as high as 98%.

[0032] 2. It solves the phenomenon of deflagration in the combustion of biomass powder existing in the existing biomass burners, and will not cause soot pollution. Description of the drawings

[0033] Figure 1 It is a cross-sectional view of a biomass powder suspension combustion device disclosed by the present utility model in the main viewing direction.

[0034] Figure 2 It is a side view of the ignition furnace chamber.

[0035] Figure 3 It is a side view of the combustion cylinder.

[0036] Wherein:

[0037]

[0038] Detailed description of the specific implementation

[0039] The following is a detailed description of the specific implementation of the present utility model.

[0040] The "range" disclosed by the present utility model is defined in the form of a lower limit and an upper limit. A given range is defined by selecting a lower limit and an upper limit, and the selected lower limit and upper limit define the boundaries of a specific range. The ranges defined in this way can include the end values or not include the end values, and can be combined arbitrarily, that is, any lower limit can be combined with any upper limit to form a range. For example, if a range of 10 to 50 is listed for a specific parameter, ranges of 10 to 40 and 20 to 50 are also contemplated. In addition, if the minimum range values 1 and 2 are listed, and if the maximum range values 3, 4, and 5 are listed, then the following ranges are all contemplated: 1 to 3, 1 to 4, 1 to 5, 2 to 3, 2 to 4, and 2 to 5. In this application, unless otherwise specified, the numerical range "a to b" represents an abbreviated representation of any real number combination between a and b, where both a and b are real numbers. For example, the numerical range "0 to 5" means that all real numbers between "0 to 5" have been fully listed herein, and "0 to 5" is only an abbreviated representation of these numerical combinations.

[0041] If there is no special instruction, all embodiments and optional embodiments of this application can be combined with each other to form a new technical solution.

[0042] If there is no special instruction, all technical features and optional technical features of this application can be combined with each other to form a new technical solution.

[0043] If there is no special instruction, all steps of this application can be carried out in sequence or randomly, preferably in sequence. For example, the method includes steps (a) and (b), which means that the method can include steps (a) and (b) carried out in sequence, or can also include steps (b) and (a) carried out in sequence. For example, it is mentioned that the method may further include step (c), which means that step (c) can be added to the method in any order. For example, the method can include steps (a), (b), and (c), or can also include steps (a), (c), and (b), or can also include steps (c), (a), and (b), etc.

[0044] If there is no special instruction, the "including" and "containing" mentioned in this application mean open-ended, and can also be closed-ended. For example, the "including" and "containing" can mean that other components not listed can also be included or contained, or can only include or contain the listed components.

[0045] If there is no special instruction, the reaction is carried out under normal temperature and normal pressure conditions.

[0046] If there is no special instruction, all parts or percentages are parts by weight or weight percentages.

[0047] In the present utility model, all the substances used are known substances, which can be purchased or synthesized by known methods.

[0048] In the present utility model, all the devices or equipment used are conventional devices or equipment known in the field, and can all be purchased.

[0049] Embodiment 1

[0050] As Figures 1-3 shown, a biomass powder suspension combustion device is composed of an ignition mechanism, a combustion mechanism, a feeding mechanism, and a air supply mechanism. The discharge port of the feeding mechanism is communicated with the feeding port of the combustion mechanism. The ignition mechanism is arranged at the bottom of the combustion mechanism. The air supply ports of the air supply mechanism are respectively communicated with the air inlet of the combustion mechanism and the air inlet of the ignition mechanism, where:

[0051] The ignition mechanism is composed of the following components:

[0052] The ignition furnace chamber 25, the inner side of which is provided with a side wall 30 made of refractory material. The bottom of the ignition furnace chamber 25 is provided with a refractory grate 24. The ignition furnace chamber 25 is provided with an ignition furnace chamber door 28;

[0053] The air chamber 23 is arranged below the refractory grate 24 and is communicated with the ignition furnace chamber 25. The bottom of the side wall of the air chamber 23 is provided with an ash cleaning door 29 communicated with the outside;

[0054] The ignition furnace air supply pipe 22, one end of which is communicated with the air chamber 23;

[0055] The combustion mechanism is composed of the following components:

[0056] The combustion cylinder 3 is generally cylindrical in shape. The outer end of the combustion cylinder 3 is provided with a reduced diameter section 2. The outside of the reduced diameter section 2 is the combustion cylinder outlet 1. The inner side of the combustion cylinder 3 is provided with a rear end wall 21. The middle of the rear end wall 21 is provided with a flared opening 6. Around the flared opening 6, a strong air supply pipe 7 arranged in a ring shape and communicated with the inner cavity of the combustion cylinder 3 is provided;

[0057] The housing 5 is arranged outside the side wall of the combustion cylinder 3. A jacket 4 is arranged between the housing 5 and the combustion cylinder 3;

[0058] The jacket air supply pipe inlet 26 is welded on the housing 5 and is communicated with the jacket 4. The jacket 4 is communicated with the inner cavity of the combustion cylinder 3 through a plurality of tangential swirl pipes 27 at the bottom side of the cavity of the combustion cylinder 3. One end of the jacket air supply pipe 20 is externally connected to the jacket air supply pipe inlet 26;

[0059] The rear wall annular air box 8 is arranged at the rear side of the rear wall 21 of the combustion cylinder 3, and the rear wall annular air box 8 is communicated with the strong air supply pipe 7. One end of the rear wall annular air box 8 is externally connected to the rear wall annular air box air supply pipe 18.

[0060] The feeding mechanism consists of the following components:

[0061] A hopper 9 with a discharge port at its bottom;

[0062] A spraying nozzle 11 with a feed inlet at its upper part. The discharge port of the hopper 9 is communicated with the feed inlet of the spraying nozzle 11. The middle part of the spraying nozzle 11 is provided with a necking section, and the front end of the spraying nozzle 11 is provided with a straight section. A spiral blade 10 is welded in the inner cavity of the straight section at the front end of the spraying nozzle 11. The straight section at the front end of the spraying nozzle 11 is communicated with the flared mouth 6; the inner cavity of the spraying nozzle 11 is communicated with the drainage pipe 16.

[0063] The air supply mechanism consists of the following components:

[0064] A main air box 19, whose air outlet is respectively communicated with the other end of the rear wall annular air box air supply pipe 18, the other end of the ignition furnace air supply pipe 22, and the other end of the jacket air supply pipe 20. The main air box air inlet 13 of the main air box 19 is communicated with the air outlet of the blower 12.

[0065] Further, the thickness of the side wall 30 is 20 cm.

[0066] Further, the straight section at the front end of the spraying nozzle 11 is inserted into the flared mouth 6 and fixedly connected to the rear wall 21 by welding.

[0067] Further, the discharge port of the hopper 9 is inserted into the feed inlet of the spraying nozzle 11 and fixedly connected by welding.

[0068] Further, the inner cavity of the spraying nozzle 11 is communicated with the drainage pipe 16 and fixedly connected by welding.

[0069] Further, a bracket 14 is provided at the bottom of the blower 12.

[0070] Further, the drainage pipe 16 is provided with a drainage pipe air injection port 17, which is located in the inner cavity of the spraying nozzle 11, and the end face of the drainage pipe air injection port 17 is at the midpoint of the width of the discharge port of the hopper 9 in the vertically downward direction.

[0071] Further, the main air box air inlet 13 of the main air box 19 is communicated with the air outlet of the blower 12 by bolt connection through a flange 15.

[0072] Further, a valve is provided on the air supply pipe 18 of the rear wall loop air box 8.

[0073] Further, a valve is provided on the jacket air supply pipe 20.

[0074] Further, a valve is provided on the air supply pipe 22 of the ignition furnace.

[0075] The operation process of a biomass powder suspension combustion device disclosed by the present utility model is as follows:

[0076] 1. Open the ignition furnace door 28, fill firewood into the ignition furnace chamber 25, ignite it, start the blower 12, and air enters the ignition furnace chamber 25 through the air supply pipe 22 of the ignition furnace in the air chamber 23. After burning the flame brightly through the refractory grate 24 for at least 5 minutes;

[0077] 2. Add biomass powder fuel with a particle size below 0.5 mm (such as wood chips, rice husks, rice bran, furfural residues, flocs, etc.) into the hopper 9, let it fall into the spray nozzle 11, and the high-speed air flow at the air injection port 17 of the drainage pipe sends the biomass powder fuel into the inner cavity of the combustion cylinder 3. Under the action of the spiral blade 10 and the bell mouth 6, the biomass powder fuel swirls and diffuses onto the flame in the ignition furnace chamber 25, the biomass powder fuel is ignited, the temperature rises rapidly instantly, the refractory wall of the combustion cylinder 3 is burned red, and the subsequent fuel is continuously ignited by the refractory wall of the combustion cylinder 3.

[0078] 3. Forced combustion: After the fuel is ignited, close the air supply pipe 22 of the ignition furnace, open the valve of the air supply pipe 18 of the rear wall loop air box, and the air in the main air box 19 sequentially passes through the air supply pipe 17 of the rear wall loop air box 8, the rear wall loop air box 8, and the strong air supply pipe 7 to supply oxygen to the combustion cylinder 3 for forced combustion. Then open the valve of the jacket air supply pipe 20, the air in the main air box 19 enters the jacket 4 through the jacket air supply pipe 20, and then enters the inner cavity of the combustion cylinder 3 through a plurality of tangential swirl pipes 27 to be mixed with the fuel for secondary combustion. The combustion temperature can reach above 1200 °C. A constriction 2 is provided at the outlet 1 of the combustion cylinder 3 to play a role in containing the fire, and the high-temperature flame is ejected from the outlet 1 of the combustion cylinder. The ash accumulation in the air chamber 23 is removed by the ash cleaning door 29, where:

[0079] The spiral blade 10 makes the feed swirl centrifugally, conforms to the bell mouth 6 and diffuses to the lower ignition furnace chamber 25, which is easy for initial ignition.

[0080] The other end of the air supply pipe 18 of the rear wall loop air box is connected to the rear wall loop air box 8, and the air in the rear wall loop air box 8 is sent into the combustion cylinder 3 through a plurality of strong air supply pipes 7 for combustion support.

[0081] The other end of the jacket air supply pipe 20 is connected to the jacket air supply pipe inlet 26, and the air in the jacket 4 is sent into the combustion cylinder 3 through the tangential swirl pipes 27 to be swirled and mixed with the fuel for secondary combustion.

[0082] The air supply pipe 22 of the ignition furnace is connected to the air chamber 23 and sent into the ignition furnace chamber 25 through the refractory furnace grate 24 to assist combustion.

[0083] Embodiment 2

[0084] It is substantially the same as Embodiment 1, except that the thickness of the side wall 30 is 12 cm.

[0085] Embodiment 3

[0086] It is substantially the same as Embodiment 1, except that the thickness of the side wall 30 is 25 cm.

[0087] The above has made a detailed description of the implementation manner of the present utility model. However, the present utility model is not limited to the above implementation manner, and various changes can be made without departing from the gist of the present utility model within the scope of knowledge possessed by those of ordinary skill in the art.

Claims

1. A biomass powder suspension combustion device, characterized in that: It is composed of an ignition mechanism, a combustion mechanism, a feeding mechanism, and an air supply mechanism. The discharge port of the feeding mechanism is connected to the feed port of the combustion mechanism. The ignition mechanism is arranged at the bottom of the combustion mechanism. The air supply port of the air supply mechanism is connected to the air inlet of the combustion mechanism and the air inlet of the ignition mechanism, respectively. The ignition mechanism is composed of the following components: The ignition furnace has a side wall made of refractory material on its inner side, a refractory grate is provided at the bottom of the ignition furnace, and the ignition furnace is provided with an ignition furnace door; A wind chamber is provided below the refractory grate and communicated with the ignition furnace, and a ash cleaning door communicating with the outside is provided at the bottom of the side wall of the wind chamber; An ignition furnace air supply pipe, one end of which is connected to the air chamber; The combustion mechanism is composed of the following components: The combustion tube is cylindrical in shape as a whole, with a constriction at the outer end of the combustion tube, the outer side of the constriction being the combustion tube outlet, a rear end wall at the inner side of the combustion tube, a bell mouth at the middle of the rear end wall, and a strong air supply pipe arranged in a ring shape and connected to the inner cavity of the combustion tube around the bell mouth; A shell is arranged outside the side wall of the combustion tube, and a jacket is provided between the shell and the combustion tube; The jacket air supply pipe inlet is welded on the shell and communicated with the jacket, the jacket is communicated with the inner cavity of the combustion tube through a plurality of tangential swirl tubes on the bottom side of the cavity of the combustion tube, and the jacket air supply pipe inlet is externally connected to one end of the jacket air supply pipe; A rear wall ring wind box is arranged on the rear side of the rear wall of the combustion tube, and the rear wall ring wind box is connected to the strong air supply pipe, and the rear wall ring wind box is externally connected to one end of the rear wall ring wind box air supply pipe; The feeding mechanism is composed of the following components: A hopper having a discharge port at the bottom; A spray nozzle, wherein a feed port is provided at the upper part thereof, a discharge port of the hopper is connected to the feed port of the spray nozzle, a necking section is provided at the middle part of the spray nozzle, a straight section is provided at the front end of the spray nozzle, a spiral blade is welded in the inner cavity of the straight section at the front end of the spray nozzle, and the straight section at the front end of the spray nozzle is connected to the bell mouth; the inner cavity of the spray nozzle is connected to the drainage pipe; The air supply mechanism is composed of the following components: The main wind box has its air outlets respectively connected with the other end of the rear end wall ring wind box air supply duct, the other end of the ignition furnace air supply duct, and the other end of the jacket air supply duct, and the main wind box air inlet of the main wind box is connected with the air outlet of the blower.

2. A biomass powder suspension combustion device as claimed in claim 1, characterized in that: The thickness of the side wall is 12-25 cm.

3. The biomass powder suspension combustion device according to claim 1, characterized in that: The front straight section of the spray nozzle is plugged into the bell mouth and fixedly connected to the rear end wall by welding.

4. The biomass powder suspension combustion device according to claim 1, characterized in that: The discharge port of the hopper is plugged into the feed port of the spray nozzle and fixedly connected by welding.

5. The biomass powder suspension combustion device according to claim 1, characterized in that: The inner cavity of the spray nozzle is communicated with the drainage pipe and is fixedly connected by welding.

6. The biomass powder suspension combustion device according to claim 1, characterized in that: A bracket is arranged at the bottom of the blower.

7. The biomass powder suspension combustion device according to claim 1, characterized in that: The drainage pipe is provided with a drainage pipe air injection port, which is located in the inner cavity of the spray nozzle, and the end surface of the drainage pipe air injection port is located at half of the width of the discharge port of the hopper vertically downward.

8. The biomass powder suspension combustion device according to claim 1, characterized in that: The main air box air inlet of the main air box is connected to the air outlet of the blower by bolts via a flange.

9. The biomass powder suspension combustion device according to claim 1, characterized in that: The air supply pipe of the rear wall ring bellows is provided with a valve, and / or The jacket air supply pipe is provided with a valve, and / or A valve is arranged on the air supply pipe of the ignition furnace.

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