Feeding device for biomass hot blast stove

Abstract

The utility model discloses a feeding device for a biomass hot blast stove. The feeding device comprises a hopper; the upper end of the barrel is communicated to the lower end opening of the hopper; the rotating shaft axially extends and is arranged in the cylinder body; a helical blade; at least one pair of cutting stirring blades; the upper end of the conveying pipe is communicated to the lower end of the barrel; the first air inlet is formed in the upper end of the conveying pipe; one end of the feeding pipe is communicated to the lower end of the conveying pipe, and the other end of the feeding pipe is communicated to the biomass hot blast stove; the second air inlet is formed in the joint of the feeding pipe and the conveying pipe; a gas pipe; and an air pump. According to the feeding device of the biomass hot-blast stove, biomass particles in the hopper can be quantitatively conveyed and crushed to a certain degree, fuel is effectively prevented from blocking an opening in the lower end of the hopper, the conveying pipe and the feeding pipe, meanwhile, air is blown into the combustion chamber, the combustion-supporting effect is achieved, and the biomass hot-blast stove is more environment-friendly. Therefore, the biomass particles are combusted more sufficiently and thoroughly, and the combustion efficiency of the biomass is ensured.

Description

Technical Field

[0001] The utility model relates to a feeding device for a biomass hot blast stove. Background Art

[0002] Existing biomass hot air furnaces generally use a screw feeder to supply biomass pellet fuel. However, during the transportation process, due to the different lengths of biomass pellets, the screw feeder is easily stuck, affecting the feeding effect. The Chinese patent application number 202222929692.0 discloses a biomass fuel conveying device for a biomass hot blast furnace, comprising a hot blast furnace and a feeding chamber arranged on one side of the hot blast furnace, characterized in that: a hopper for storing materials and a conveying mechanism installed at the lower end of the hopper are provided at the upper end of the feeding chamber, the conveying mechanism comprises a conveyor and a frame installed at the upper end of the conveyor, both sides of the frame are fixedly installed on the conveyor, a sealing door assembly for controlling the falling speed of materials is provided at the front end of the frame, a sealing plate is provided at the rear end of the frame, the sealing plate is attached to the upper end of the conveyor to prevent materials from falling, a receiving box is fixedly provided at the upper end of the frame, and the receiving box is connected to the bottom opening of the hopper through the receiving box to guide the materials onto the conveyor, and a material guide box is provided at one end of the conveyor located at the sealing door assembly to receive the materials, and the external conveying pipe of the material guide box is connected to the hot blast furnace to guide the materials into the hot blast furnace. In the device, the conveyor 4 is used to transport biomass particles, and the lifting of the sealing plate in the sealing door assembly is used to control the size of the opening of the front end of the enclosure frame to ensure quantitative feeding. However, the biomass particles are stored in the hopper 3, and there is no quantitative feeding control in the process of the biomass particles being introduced into the upper end of the conveyor 4 through the receiving box 51. The freely falling biomass particles will be directly accumulated on the upper end of the conveyor 4. Due to the interaction between the stacked, squeezed and cross-distributed biomass particles, the anti-skid protrusion 44 can only increase a certain friction force on the surface of the conveying chain plate 43, and cannot guarantee that the biomass particles can be quantitatively pushed to the sealing plate, and cannot guarantee the stability of the biomass particle transportation. Utility Model Content

[0003] An object of the present invention is to solve at least the above problems and to provide at least the advantages which will be described below.

[0004] Another object of the utility model is to provide a feeding device for a biomass hot blast furnace, which can quantitatively feed and crush the biomass particles in the hopper to a certain extent, effectively avoiding fuel clogging the lower opening of the hopper, the feeding pipe and the feeding pipe, and at the same time blowing air into the combustion chamber, which has the effect of assisting combustion, making the biomass particles burn more fully and thoroughly, and ensuring the combustion efficiency of the biomass.

[0005] In order to achieve these purposes and other advantages according to the utility model, a feeding device for a biomass hot blast stove is provided, comprising:

[0006] hopper;

[0007] A cylinder, the upper end of which is connected to the lower opening of the hopper;

[0008] A rotating shaft is axially extended and arranged in the cylinder, and an upper end of the rotating shaft extends upward into the hopper;

[0009] A spiral blade is arranged on a part of the rotating shaft located in the hopper, and the lower end of the spiral blade is located at the junction of the cylinder and the lower end opening of the hopper, and the cross-sectional diameter of the spiral blade is smaller than the cross-sectional diameter of the hopper;

[0010] at least one pair of cutting and stirring blades disposed on a portion of the rotating shaft located on the barrel;

[0011] A material delivery pipe is obliquely arranged below the cylinder, and the upper end of the material delivery pipe is connected to the lower end of the cylinder;

[0012] A first air inlet is provided at the upper end of the material conveying pipe and close to the connection between the material conveying pipe and the cylinder, and the air inlet direction of the first air inlet is consistent with the material conveying direction of the material conveying pipe;

[0013] A feeding pipe, one end of which is connected to the lower end of the feeding pipe, and the other end of which is connected to the biomass hot air furnace;

[0014] A second air inlet is provided at the junction of the feeding pipe and the conveying pipe, and the air inlet direction of the second air inlet is consistent with the feeding direction of the feeding pipe; and

[0015] An air delivery pipe, the air outlet end of which is connected to the first air inlet and the second air inlet respectively;

[0016] An air pump is arranged on the air delivery pipe.

[0017] Preferably, it includes:

[0018] A pair of fixed beams are respectively arranged in the hopper and in the lower end of the cylinder, and the upper end and the lower end of the rotating shaft are rotatably arranged on the pair of fixed beams through bearings;

[0019] The reduction motor is arranged below the hopper, and the reduction motor drives the rotating shaft to rotate.

[0020] Preferably, the feeding pipe includes two branch feeding pipes arranged side by side, and a second air inlet is respectively arranged at one end of the two branch feeding pipes in a one-to-one correspondence.

[0021] Preferably, it includes:

[0022] A heat exchange cylinder is sleeved on the furnace body of the biomass hot air furnace;

[0023] An air inlet is provided at the bottom of the heat exchange tube;

[0024] A one-way valve, which is arranged at the air inlet;

[0025] The air outlet is communicated with the air inlet end of the air delivery pipe.

[0026] Preferably, the cross-sectional diameter of the spiral blade gradually decreases from top to bottom; and the cross-sectional diameter of the lower end of the spiral blade is adapted to the cross-sectional diameter of the lower end opening of the hopper.

[0027] Preferably, the air intake volume of the first air inlet is less than or equal to the air intake volume of the second air inlet.

[0028] The utility model at least has the following beneficial effects:

[0029] The feeding device of the biomass hot blast furnace provided by the utility model can quantitatively feed the biomass particles in the hopper and crush them to a certain extent, effectively avoiding the fuel from clogging the lower opening of the hopper, the feeding pipe and the feeding pipe, and at the same time blowing air into the combustion chamber, which has the effect of assisting combustion, making the biomass particles burn more fully and thoroughly, and ensuring the combustion efficiency of the biomass.

[0030] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic cross-sectional structure diagram of a feeding device for a biomass hot blast furnace in one embodiment of the utility model;

[0032] Figure 2 This is a schematic cross-sectional structure diagram of a feeding device for a biomass hot blast furnace in another embodiment of the utility model;

[0033] Figure 3 It is a schematic diagram of the top view of the hopper in one embodiment of the utility model;

[0034] Figure 4 This is a front view structural diagram of the material conveying pipe and the material feeding pipe in one embodiment of the utility model;

[0035] Figure 5 This is a schematic cross-sectional structure diagram of a feeding device for a biomass hot blast furnace in another embodiment of the utility model;

[0036] Figure 6 The figure is a schematic diagram of the cross-sectional structure of the spiral blade in another embodiment of the present invention. DETAILED DESCRIPTION

[0037] The present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0038] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0039] like Figure 1 As shown, the utility model provides a feeding device for a biomass hot air furnace, comprising:

[0040] The hopper 10 is a funnel-shaped structure, which is convenient for loading and unloading;

[0041] The cylinder 20 has an upper end connected to the lower opening of the hopper;

[0042] A rotating shaft 30 is axially extended and disposed in the cylinder, and an upper end of the rotating shaft extends upward into the hopper;

[0043] A spiral blade 301 is arranged on a part of the rotating shaft located in the hopper, and the lower end of the spiral blade is located at the junction of the cylinder and the lower end opening of the hopper, and the cross-sectional diameter of the spiral blade is smaller than the cross-sectional diameter of the hopper;

[0044] At least one pair of cutting and stirring blades 302 are arranged on a portion of the rotating shaft located in the cylinder; the length of the biomass particles is generally between 10 and 100 mm, and the spacing between the at least one pair of cutting and stirring blades can be 40 mm, 50 mm or 70 mm, etc., so as to cut the overlong biomass particles;

[0045] A material delivery pipe 40 is obliquely arranged below the cylinder, and the upper end of the material delivery pipe is connected to the lower end of the cylinder;

[0046] The first air inlet 401 is provided at the upper end of the material conveying pipe and close to the connection between the material conveying pipe and the cylinder, and the air inlet direction of the first air inlet is consistent with the material conveying direction of the material conveying pipe;

[0047] A feeding pipe 50, one end of which is connected to the lower end of the feeding pipe, and the other end of which is connected to the biomass hot air furnace 1. The feeding pipe can be arranged at a certain angle toward the biomass hot air furnace, or can be arranged horizontally;

[0048] A second air inlet 501 is provided at the junction of the feeding pipe and the conveying pipe, and the air inlet direction of the second air inlet is consistent with the feeding direction of the feeding pipe; and

[0049] The gas delivery pipe 60 has its gas outlet connected to the first gas inlet and the second gas inlet respectively;

[0050] The air pump 70 is arranged on the air delivery pipe.

[0051] In this solution, the cylinder is used to connect the hopper and the feed pipe, and provide a limited space for at least one pair of cutting and stirring blades, so as to facilitate the crushing and cutting of relatively long biomass particles (for example, biomass particles with a length greater than 50 mm) to avoid clogging the cylinder, the feed pipe and the feeding pipe, so as to achieve the purpose of smoothly conveying the biomass particles and quantitative feeding; after the biomass particles enter the inclined feed pipe, they can quickly slide toward the filling pipe under the action of gravity, and the feeding effect can be further guaranteed with the assistance of the high-pressure air entering the first air inlet, so as to avoid the biomass particles from clogging the feed pipe. Similarly, the high-pressure gas entering the second air inlet can blow the biomass particles into the biomass hot air furnace, and provide sufficient oxygen so that the biomass particles can be fully burned; in addition, the high-pressure gas entering the second air inlet also allows the biomass particles to fall into the combustion chamber of the combustion furnace evenly and dispersedly under the action of gravity when entering the biomass hot air furnace, so as to avoid the biomass particles from accumulating at the feed inlet, ensuring full combustion, fully releasing heat energy, and extending the service life of the biomass hot air furnace.

[0052] In summary, the feeding device of the biomass hot blast furnace provided by the utility model can quantitatively feed the biomass particles in the hopper and crush them to a certain extent, effectively avoiding the fuel from clogging the lower opening of the hopper, the feeding pipe and the feeding pipe, and at the same time blowing air into the combustion chamber, which has the effect of assisting combustion, making the biomass particles burn more fully and thoroughly, thereby ensuring the combustion efficiency of the biomass.

[0053] like Figure 2 , 3 As shown, a preferred solution includes: a pair of fixed beams 80, which are respectively arranged in the hopper and the lower end of the cylinder, and the upper and lower ends of the rotating shaft are rotatably arranged on the pair of fixed beams through bearings; a reduction motor 90, which is arranged below the hopper, and the reduction motor drives the rotating shaft to rotate. In this solution, a pair of fixed beams are used to support the rotating shaft so that it can stably rotate and feed and cut, ensuring the stable operation of the rotating shaft. The reduction motor is used to drive the rotating shaft to rotate and discharge materials, and the discharge amount is adjusted by adjusting the speed of the reduction motor.

[0054] like Figure 4 As shown, in a preferred embodiment, the feeding pipe includes two branch feeding pipes arranged side by side, and one end of each of the two branch feeding pipes is provided with a second air inlet corresponding to each other. In this embodiment, the feeding pipe is divided into two branch feeding pipes, and the biomass particles can be transported to different positions in the biomass hot air furnace respectively, so that the biomass particles are more evenly distributed and the combustion effect is good.

[0055] like Figure 5As shown, a preferred solution includes: a heat exchange cylinder 100, which is sleeved on the furnace body of the biomass hot air furnace; an air inlet 200, which is opened at the bottom of the heat exchange cylinder; a one-way valve 300, which is arranged at the air inlet; and an air outlet, which is connected to the air inlet end of the gas pipe. In this solution, the heat energy of biomass combustion diffused around the furnace body is exchanged to the air about to enter the biomass furnace through the heat exchange cylinder, promoting the full combustion of biomass particles and ensuring the combustion effect.

[0056] like Figure 6 As shown, in a preferred embodiment, the cross-sectional diameter of the spiral blade gradually decreases from top to bottom; the cross-sectional diameter of the lower end of the spiral blade is adapted to the cross-sectional diameter of the lower end opening of the hopper. In this embodiment, the spiral blade is used to promote the biomass particles near the periphery to move toward the lower end opening of the hopper, and to quantitatively control the biomass particles discharged to prevent too many biomass particles from falling quickly, so as to prevent the lower end opening from being blocked by too many biomass particles.

[0057] In a preferred embodiment, the air intake volume of the first air inlet is less than or equal to the air intake volume of the second air inlet.

[0058] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A feeding device for a biomass hot blast stove, characterized in that: include: hopper; A cylinder, the upper end of which is connected to the lower opening of the hopper; A rotating shaft is axially extended and arranged in the cylinder, and an upper end of the rotating shaft extends upward into the hopper; A spiral blade is arranged on a part of the rotating shaft located in the hopper, and the lower end of the spiral blade is located at the junction of the cylinder and the lower end opening of the hopper, and the cross-sectional diameter of the spiral blade is smaller than the cross-sectional diameter of the hopper; at least one pair of cutting and stirring blades disposed on a portion of the rotating shaft located on the barrel; A material delivery pipe is obliquely arranged below the cylinder, and the upper end of the material delivery pipe is connected to the lower end of the cylinder; A first air inlet is provided at the upper end of the material conveying pipe and close to the connection between the material conveying pipe and the cylinder, and the air inlet direction of the first air inlet is consistent with the material conveying direction of the material conveying pipe; A feeding pipe, one end of which is connected to the lower end of the feeding pipe, and the other end of which is connected to the biomass hot air furnace; The second air inlet is provided at the junction of the feeding pipe and the conveying pipe, and the air inlet direction of the second air inlet is consistent with the feeding direction of the feeding pipe; as well as An air delivery pipe, the air outlet end of which is connected to the first air inlet and the second air inlet respectively; An air pump is arranged on the air delivery pipe.

2. The feeding device for the biomass hot air stove according to claim 1, characterized in that: include: A pair of fixed beams are respectively arranged in the hopper and in the lower end of the cylinder, and the upper end and the lower end of the rotating shaft are rotatably arranged on the pair of fixed beams through bearings; The reduction motor is arranged below the hopper, and the reduction motor drives the rotating shaft to rotate.

3. The feeding device for the biomass hot air stove according to claim 1, characterized in that: The feeding pipe comprises two branch feeding pipes arranged side by side, and a second air inlet is respectively arranged at one end of the two branch feeding pipes in a one-to-one correspondence.

4. The feeding device for the biomass hot blast stove according to claim 1, characterized in that: include: A heat exchange cylinder is sleeved on the furnace body of the biomass hot air furnace; An air inlet is provided at the bottom of the heat exchange tube; A one-way valve, which is arranged at the air inlet; The air outlet is communicated with the air inlet end of the air delivery pipe.

5. The feeding device for the biomass hot blast stove according to claim 1, characterized in that: From top to bottom, the cross-sectional diameter of the spiral blade gradually decreases; the cross-sectional diameter of the lower end of the spiral blade is adapted to the cross-sectional diameter of the lower end opening of the hopper.

6. The feeding device for the biomass hot blast stove according to claim 1, characterized in that: The air intake volume of the first air inlet is less than or equal to the air intake volume of the second air inlet.

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