Biomass gas fuel steam boiler

Abstract

The application discloses biomass gas fuel steam boiler and relates to the technical field of steam boilers. The application comprises a cylinder which is horizontally arranged above the ground through two supporting columns, a furnace is installed in the cylinder and penetrates into the cylinder, a water storage cavity is arranged between the furnace and the cylinder, and a reciprocating flue is arranged in the water storage cavity. A combustion machine is fixedly connected to one end of the cylinder and is arranged in the furnace. An upper feeding mechanism comprises a feeding frame which is fixedly connected between the combustion machine and the furnace, and a gas feeding pipe is arranged on one side of the feeding frame. The feeding frame is arranged between the combustion machine and the furnace, and the biomass solid fuel and gas fuel are simultaneously fed into the feeding frame through the spiral feeding part and the gas feeding pipe. The synchronous combustion after mixing can effectively avoid the accidental extinguishing of the gas fuel, and the combustion of the gas fuel can dry the solid fuel, so that the solid fuel can be fully combusted and the heat utilization is ensured.

Description

Technical Field

[0001] This application relates to the field of steam boiler technology, specifically to biomass gas fuel steam boilers. Background Technology

[0002] A biomass fuel steam boiler is a device that uses biomass fuel as an energy source to generate steam for industrial production or heating. Biomass fuel exists in both solid and gaseous forms. Solid fuels are mostly renewable biomass materials such as sawdust, straw, and plant residues. These materials are burned in the boiler to generate high-temperature heat energy, which produces steam through heat exchange. Gaseous fuels are combustible gases produced by pyrolysis, gasification, or fermentation of biomass (such as sawdust, straw, and plant residues).

[0003] Biomass gaseous fuel steam boilers are boilers that use biomass combustible gas as fuel. They have the characteristics of renewable energy, low carbon emissions and environmental friendliness. However, the amount of fuel required for the combustion of biomass gaseous fuel is too large and cannot be interrupted, otherwise it needs to be restarted. Biomass solid fuel can avoid this problem, but solid fuel is at risk of getting damp, which will cause heat waste during combustion. Therefore, this invention proposes a biomass gaseous fuel steam boiler that can use gaseous fuel and solid fuel together. Summary of the Invention

[0004] The purpose of this application is to provide a biomass gas fuel steam boiler in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this application specifically adopts the following technical solution:

[0006] Biomass gas fuel steam boilers, including:

[0007] The cylinder is horizontally positioned above the ground by two support columns. A furnace liner is installed through one end of the cylinder in a horizontal direction. A water storage cavity is provided between the furnace liner and the cylinder. A reciprocating flue is provided inside the water storage cavity.

[0008] The burner is fixedly connected to one end of the cylinder and inserted into the furnace chamber;

[0009] The feeding mechanism includes a feeding frame that is fixedly connected between the burner and the furnace shell, a gas feeding pipe is constructed on one side of the feeding frame, and a spiral feeding component is fixedly connected to the bottom of the feeding frame;

[0010] The pellet storage frame includes a trapezoidal frame fixedly connected to a support column, the spiral feeding component is inserted into the trapezoidal frame, the outer surface of the trapezoidal frame is wrapped with an air inlet heating frame, and one end of the air inlet heating frame is connected to the reciprocating flue inside the cylinder.

[0011] Furthermore, a first partition plate and a second partition plate are fixedly connected in parallel inside the cylinder, the water storage cavity is constructed between the first partition plate and the second partition plate, and the furnace liner passes through the first partition plate and the second partition plate and its end is flush with the surface of the second partition plate.

[0012] Furthermore, the reciprocating flue includes a first smoke inlet chamber disposed between the second partition plate and the inner end of the cylinder, and a second smoke inlet chamber is constructed between the first partition plate and the other end of the cylinder. The first smoke inlet chamber contains a first partition plate that wraps around the upper side of the furnace opening, and the second smoke inlet chamber contains a second partition plate that is horizontally arranged and higher than the first partition plate. A plurality of smoke passage pipes located on the lower side of the second partition plate are installed through the first partition plate and the second partition plate. The plurality of smoke passage pipes are respectively disposed on the upper and lower sides of the first partition plate.

[0013] Furthermore, the furnace liner includes a horizontal tube that penetrates the cylinder at one end, and multiple corrugated convex rings are arrayed along its length on the horizontal tube.

[0014] Furthermore, one end of the cylinder is sealed and the other end is open. The open end of the cylinder is equipped with a flange, and two opposing semi-circular sealing plates are connected to the flange by bolts. The two semi-circular sealing plates wrap around one end of the furnace liner.

[0015] Furthermore, the spiral feeding component includes a vertical pipe fixedly connected to the bottom of the feeding frame, a spiral rod rotatably disposed inside the vertical pipe, a rotating rod fixedly connected to the upper end of the spiral rod and disposed inside the feeding frame, a drive motor fixedly connected to the upper end of the feeding frame, the output shaft of the drive motor being coaxially connected to the rotating rod, and the gas feeding pipe including an air inlet pipe fixedly connected to one side of the feeding frame, and a control valve fixedly connected to the air inlet pipe.

[0016] Furthermore, the upper end of the trapezoidal frame is provided with a discharge port, a top plate is fixedly connected to one side of the discharge port, a flap is hinged between the top plate and the other side of the discharge port, and the top plate is provided with a mesh.

[0017] Furthermore, the air intake heating frame includes an L-shaped flow pipe fixedly connected to the cylinder and communicating with the bottom of the second smoke inlet chamber. The outer surface of the trapezoidal frame is wrapped with a smoke inlet frame. One end of the smoke inlet frame is connected to the L-shaped flow pipe and the other end is constructed with an exhaust pipe for discharging smoke.

[0018] Furthermore, multiple baffles are provided between the inner wall of the smoke inlet frame and the outer wall of the trapezoidal frame, and a serpentine flow cavity is formed between the inner wall of the smoke inlet frame and the outer wall of the trapezoidal frame through the multiple baffles.

[0019] Furthermore, the upper side of the cylinder is constructed with a smoke exhaust pipe that is connected to the second smoke inlet chamber and located above the second partition plate. A sealing plate for sealing its opening is inserted into one side of the smoke exhaust pipe, and a sealing plate for sealing its opening is inserted into one side of the L-shaped flow pipe.

[0020] The beneficial effects of this application are as follows:

[0021] 1. This application sets up a feeding frame between the burner and the furnace chamber, uses a screw feeder to transport biomass solid fuel into the feeding frame, and injects biomass gaseous fuel into the feeding frame through a gas feed pipe to mix with the solid fuel. Synchronous combustion can effectively prevent the gaseous fuel from accidentally extinguishing, and can also use the combustion of gaseous fuel to dry the solid fuel, so as to ensure complete combustion and heat utilization.

[0022] 2. This application, by setting an air intake heating frame inside the pellet storage frame, can use combustion flue gas to increase its initial temperature, thereby evaporating the moisture in the solid fuel and further ensuring the completeness of subsequent combustion. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of this application;

[0024] Figure 2 This is a three-dimensional half-sectional view of the present application;

[0025] Figure 3 This is a partial three-dimensional structural diagram of this application;

[0026] Figure 4 This is a three-dimensional structural diagram of the furnace liner in this application;

[0027] Figure 5 This is a three-dimensional structural diagram of the feeding mechanism in this application;

[0028] Figure 6 This application Figure 5 Half-section of the three-dimensional structure;

[0029] Figure 7 This is a three-dimensional structural diagram of the particle storage frame of this application;

[0030] Figure 8 This application Figure 7 Half-section of the three-dimensional structure;

[0031] Reference numerals: 1. Cylinder; 101. Partition plate one; 102. Partition plate two; 103. Flange; 104. Semi-circular sealing plate; 2. Support column; 3. Furnace shell; 301. Horizontal pipe; 302. Corrugated ring; 4. Water storage cavity; 5. Reciprocating flue; 501. Smoke inlet cavity one; 502. Smoke inlet cavity two; 503. Partition plate one; 504. Partition plate two; 505. Smoke pipe; 6. Burner; 7. Feeding mechanism; 701. Feed frame; 702. Gas feed pipe; 7021. Air inlet pipe; 7022. Control... Valve; 703, Spiral feeder; 7031, Vertical pipe; 7032, Spiral rod; 7033, Rotating rod; 7034, Drive motor; 8, Particle storage frame; 801, Trapezoidal frame; 8011, Discharge port; 8012, Top plate; 8013, Flip cover; 8014, Mesh; 802, Air inlet heating frame; 8021, L-shaped flow pipe; 80211, Sealing plate; 8022, Smoke inlet frame; 8023, Exhaust pipe; 8024, Baffle plate; 8025, Serpentine flow cavity; 9, Smoke exhaust pipe; 901, Insert plate. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0033] like Figures 1-2 As shown, one embodiment of this application proposes a biomass gas fuel steam boiler, comprising:

[0034] The cylinder 1 is horizontally positioned above the ground by two support columns 2. A furnace 3 is installed through one end of the cylinder 1 in a horizontal direction. A water storage chamber 4 is provided between the furnace 3 and the cylinder 1. A reciprocating flue 5 is provided inside the water storage chamber 4. The cylinder 1 is a cylindrical frame plate. The water storage chamber 4 inside is used to fill water. The reciprocating flue 5 is connected to the furnace 3. The high-temperature flue gas generated after combustion in the furnace 3 passes through the reciprocating flue 5 to continuously heat the water storage chamber 4, thereby causing the water in the water storage chamber 4 to boil and evaporate, forming high-temperature steam.

[0035] The burner 6 is fixedly connected to one end of the cylinder 1 and inserted into the furnace 3. It is an existing device for burning fuel and has a jet function, which can spray fuel into the furnace 3 during the combustion process so as to rapidly raise the temperature inside the furnace 3.

[0036] The feeding mechanism 7 includes a feeding frame 701 fixedly connected between the burner 6 and the furnace 3. A gas feed pipe 702 is constructed on one side of the feeding frame 701, and a spiral feeding component 703 is fixedly connected to the bottom of the feeding frame 701. The gas feed pipe 702 can directly inject biomass gaseous fuel into the feeding frame 701, and then ignite it through the burner 6 and spray it into the furnace 3. At the same time, the spiral feeding component 703 can also transport solid granular biomass fuel into the feeding frame 701 for synchronous ignition, and then spray it into the furnace 3 along with the gas from the feeding frame 701 for combustion. The mixed combustion of the two types of fuel can effectively avoid the accidental extinction of the single gaseous fuel, ensuring the continuous combustion of the furnace fire. Moreover, gas combustion is easier than solid combustion. The heat of gas combustion can be used to coat the solid biomass fuel, causing the moisture in the fuel to evaporate quickly, thereby ensuring the complete combustion of the solid fuel, improving the heating effect and ensuring the utilization rate of heat.

[0037] The pellet storage frame 8 includes a trapezoidal frame 801 fixedly connected to the support column 2, a spiral feeder 703 inserted inside the trapezoidal frame 801, and an air intake heating frame 802 covering the outer surface of the trapezoidal frame 801. One end of the air intake heating frame 802 is connected to the reciprocating flue 5 inside the cylinder 1. The air intake heating frame 802 can be used to inject a portion of high-temperature flue gas from inside the cylinder 1 onto the outer surface of the trapezoidal frame 801, thereby increasing the temperature inside the trapezoidal frame 801 and enabling the solid pellet fuel stored therein to quickly evaporate the internal moisture, further ensuring the subsequent complete combustion of the solid fuel.

[0038] like Figures 2-3 As shown, in some embodiments, a first partition plate 101 and a second partition plate 102 are fixedly connected inside the cylinder 1 in parallel. A water storage cavity 4 is constructed between the first partition plate 101 and the second partition plate 102. The furnace liner 3 passes through the first partition plate 101 and the second partition plate 102 and its end is flush with the surface of the second partition plate 102. The first partition plate 101 and the second partition plate 102 are used to support the furnace liner 3 so that it can be suspended inside the cylinder 1. A sealed cavity can be formed between the outer wall of the furnace liner 3 and the first partition plate 101 and the second partition plate 102. This cavity is the water storage cavity 4, which can prevent the water source from directly contacting the flue gas, and can also transfer heat to the water storage cavity 4 through the furnace liner 3, the first partition plate 101 and the second partition plate 102, so as to ensure the heating effect.

[0039] like Figures 2-3As shown, in some embodiments, the reciprocating flue 5 includes a first smoke inlet chamber 501 disposed between the second partition plate 102 and the inner end of the cylinder 1. The second smoke inlet chamber 502 is constructed between the second partition plate 101 and the other end of the cylinder 1. A first partition plate 503, covering the upper side of the furnace liner 3 opening, is constructed within the first smoke inlet chamber 501. A second partition plate 504, horizontally disposed and higher than the first partition plate 503, is constructed within the second smoke inlet chamber 502. Multiple smoke passage pipes 505, located below the second partition plate 504, are installed through the second partition plate 101 and the second partition plate 102. The flue gas 505 is located on the upper and lower sides of the partition plate 503. The high-temperature flue gas generated after fuel combustion will first enter the flue gas inlet chamber 501 through the furnace shell 3 and will be blocked by the partition plate 503. Then, it will enter the flue gas inlet chamber 502 through part of the flue gas 505, be blocked again by the partition plate 504, and re-enter the flue gas inlet chamber 501 above the partition plate 503 through the remaining flue gas 505. This forms a flue gas that repeatedly passes through the water storage chamber 4, ensuring the heat transfer effect and improving the heat utilization rate.

[0040] like Figure 4 As shown, in some embodiments, the furnace liner 3 includes a horizontal pipe 301 that extends through the cylinder 1 at one end. Multiple corrugated protrusions 302 are arrayed on the horizontal pipe 301 along its length. The multiple corrugated protrusions 302 on the horizontal pipe 301 can effectively prevent the direct splashing of solid fuel, ensuring that the solid fuel can be completely burned in the horizontal pipe 301, preventing dust from entering the flue gas inlet 501, increasing safety, and also increasing the contact area with the water storage chamber 4, thereby improving the heat transfer efficiency.

[0041] like Figures 1-2 As shown, in some embodiments, one end of the cylinder 1 is sealed and the other end is open. The open end of the cylinder 1 is equipped with a flange 103. Two opposing semi-circular sealing plates 104 are bolted to the flange 103. The two semi-circular sealing plates 104 wrap around one end of the furnace liner 3. The semi-circular sealing plates 104 are connected to the flange 103 by bolts. On the one hand, the end of the furnace liner 3 can be wrapped to form an internal sealed cavity to prevent heat loss. On the other hand, it can be easily disassembled when cleaning the inside of the cylinder 1, so as to open the inside of the furnace liner 3 and the inside of the flue pipe 505, increasing the convenience of the device.

[0042] like Figures 5-6As shown, in some embodiments, the spiral feeding component 703 includes a vertical tube 7031 fixedly connected to the bottom of the feed frame 701. A spiral rod 7032 is rotatably disposed inside the vertical tube 7031. A rotating rod 7033 disposed inside the feed frame 701 is fixedly connected to the upper end of the spiral rod 7032. A drive motor 7034 is fixedly connected to the upper end of the feed frame 701. The output shaft of the drive motor 7034 is coaxially connected to the rotating rod 7033. The drive motor 7034 can drive the rotating rod 7033 and the spiral rod 7032 to rotate. During the rotation of the spiral rod 7032, it will cause it to rotate with the vertical tube 7031. The cavity inside 1 spirals upward to lift the solid fuel at the bottom into the feed frame 701. The gas feed pipe 702 includes an air inlet pipe 7021 fixedly connected to one side of the feed frame 701. A control valve 7022 is fixedly connected to the air inlet pipe 7021. The interface end of the air inlet pipe 7021 and the feed frame 701 is set opposite to the rotating rod 7033 so that the gaseous fuel and solid fuel can directly contact each other when they enter the feed frame 701, ensuring the mixing effect. The control valve 7022 is set to close its opening to prevent solid fuel from entering the air inlet pipe 7021 and increase the safety of the device.

[0043] like Figure 7 As shown, in some embodiments, the upper end of the trapezoidal frame 801 is provided with a discharge port 8011, a top plate 8012 is fixedly connected to one side of the discharge port 8011, and a flap 8013 is hinged between the top plate 8012 and the other side of the discharge port 8011. The top plate 8012 is provided with a mesh 8014. The flap 8013 is provided to facilitate the sealing of the opening after solid fuel is put into the trapezoidal frame 801, so as to ensure that the heat transmitted from the air intake heating frame 802 can be reduced and the drying efficiency of the damp fuel can be improved. The mesh 8014 is used as the outlet after the moisture evaporates.

[0044] like Figure 8 As shown, in some embodiments, the air intake heating frame 802 includes an L-shaped flow pipe 8021 fixedly connected to the cylinder 1 and communicating with the bottom of the smoke inlet chamber 502. The outer surface of the trapezoidal frame 801 is covered with a smoke inlet frame 8022. One end of the smoke inlet frame 8022 is connected to the L-shaped flow pipe 8021 and the other end is constructed with an exhaust pipe 8023 for discharging smoke. It should be noted that the smoke inlet frame 8022 only covers the other surfaces of the trapezoidal frame 801 except for the top surface, and the connection between the L-shaped flow pipe 8021 and the smoke inlet frame 8022 is located at the bottom end of the smoke inlet frame 8022. This allows the high-temperature smoke to flow upward along the bottom surface of the trapezoidal frame 801, thereby ensuring the smooth transfer of heat and increasing the drying effect.

[0045] like Figure 8As shown, in some embodiments, a plurality of baffles 8024 are provided between the inner wall of the smoke inlet frame 8022 and the outer wall of the trapezoidal frame 801. A serpentine flow cavity 8025 is formed between the inner wall of the smoke inlet frame 8022 and the outer wall of the trapezoidal frame 801 through the plurality of baffles 8024. The serpentine flow cavity 8025 can increase the time in which the flue gas flows, which is conducive to heat transfer and ensures the heating effect.

[0046] like Figure 1 , Figure 2 and Figure 8 As shown, in some embodiments, the upper side of the cylinder 1 is constructed with a smoke exhaust pipe 9 that communicates with the second smoke inlet chamber 502 and is located above the second partition plate 504. A sealing plate 901 for sealing its opening is inserted into one side of the smoke exhaust pipe 9, and a sealing plate 80211 for sealing its opening is inserted into one side of the L-shaped flow pipe 8021. It should be noted that a smoke outlet pipe is also installed through the partition plate 101 and the second partition plate 102. The smoke outlet pipe is located above the second partition plate 504 and all the smoke passage pipes 505, and is used to receive the smoke discharged from the smoke passage pipes 505. The flue gas is then discharged through the exhaust pipe 9 after passing through the water storage chamber 4. A sealing plate 901 is installed on the exhaust pipe 9 and a sealing plate 80211 is installed on the L-shaped flow pipe 8021. These are mainly used to seal the exhaust pipe 9 when heating the trapezoidal frame 801, allowing the high-temperature flue gas to flow directly into the L-shaped flow pipe 8021. After heating is completed, the sealing plate 80211 can be inserted and the sealing plate 901 can be pulled out to prevent the flue gas from entering the L-shaped flow pipe 8021. The flue gas can also pass smoothly through the reciprocating flue 5, increasing the flexibility of the device.

[0047] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A biomass gas fuel steam boiler, characterized in that, include: The cylinder (1) is horizontally positioned above the ground by two support columns (2). A furnace liner (3) is installed through one end of the cylinder (1) in a horizontal direction. A water storage chamber (4) is provided between the furnace liner (3) and the cylinder (1). A reciprocating flue (5) is provided inside the water storage chamber (4). The burner (6) is fixedly connected to one end of the cylinder (1) and inserted into the furnace chamber (3); The feeding mechanism (7) includes a feeding frame (701) fixedly connected between the burner (6) and the furnace (3), a gas feeding pipe (702) is constructed on one side of the feeding frame (701), and a spiral feeding component (703) is fixedly connected to the bottom of the feeding frame (701). The pellet storage frame (8) includes a trapezoidal frame (801) fixedly connected to the support column (2), the spiral feeding component (703) is inserted in the trapezoidal frame (801), the outer surface of the trapezoidal frame (801) is wrapped with an air intake heating frame (802), and one end of the air intake heating frame (802) is connected to the reciprocating flue (5) inside the cylinder (1); The cylinder (1) is fixedly connected with a first partition plate (101) and a second partition plate (102) arranged in parallel. The water storage cavity (4) is constructed between the first partition plate (101) and the second partition plate (102). The furnace liner (3) passes through the first partition plate (101) and the second partition plate (102) and its end is flush with the surface of the second partition plate (102). The reciprocating flue (5) includes a first smoke inlet chamber (501) disposed between the second partition plate (102) and the inner end of the cylinder (1). The second smoke inlet chamber (502) is constructed between the first partition plate (101) and the other end of the cylinder (1). The first smoke inlet chamber (501) is constructed with a first partition plate (503) wrapped around the upper side of the opening of the furnace shell (3). The second smoke inlet chamber (502) is constructed with a second partition plate (504) that is horizontally arranged and higher than the first partition plate (503). A plurality of smoke pipes (505) located below the second partition plate (504) are installed through the first partition plate (101) and the second partition plate (102). The plurality of smoke pipes (505) are disposed on the upper and lower sides of the first partition plate (503). The spiral feeding component (703) includes a vertical pipe (7031) fixedly connected to the bottom of the feeding frame (701), a spiral rod (7032) rotatably disposed inside the vertical pipe (7031), a rotating rod (7033) fixedly connected to the upper end of the spiral rod (7032) and disposed inside the feeding frame (701), a drive motor (7034) fixedly connected to the upper end of the feeding frame (701), the output shaft of the drive motor (7034) being coaxially connected to the rotating rod (7033), and the gas feed pipe (702) includes an air inlet pipe (7021) fixedly connected to one side of the feeding frame (701), and a control valve (7022) fixedly connected to the air inlet pipe (7021). The upper end of the trapezoidal frame (801) is provided with a feeding port (8011), a top plate (8012) is fixedly connected to one side of the feeding port (8011), and a flip cover (8013) is hinged between the top plate (8012) and the other side of the feeding port (8011). The top plate (8012) is provided with a mesh (8014). The air intake heating frame (802) includes an L-shaped flow pipe (8021) fixedly connected to the cylinder (1) and connected to the bottom of the second smoke inlet chamber (502). The outer surface of the trapezoidal frame (801) is covered with a smoke inlet frame (8022). One end of the smoke inlet frame (8022) is connected to the L-shaped flow pipe (8021) and the other end is constructed with an exhaust pipe (8023) for discharging smoke. Multiple baffles (8024) are provided between the inner wall of the smoke inlet frame (8022) and the outer wall of the trapezoidal frame (801), and a serpentine flow cavity (8025) is formed between the inner wall of the smoke inlet frame (8022) and the outer wall of the trapezoidal frame (801) through the multiple baffles (8024). The upper side of the cylinder (1) is provided with a smoke exhaust pipe (9) that is connected to the second smoke inlet chamber (502) and located above the second partition plate (504). A sealing plate (901) for sealing its opening is inserted on one side of the smoke exhaust pipe (9), and a sealing plate (80211) for sealing its opening is inserted on one side of the L-shaped flow pipe (8021).

2. The biomass gas fuel steam boiler according to claim 1, characterized in that, The furnace liner (3) includes a horizontal tube (301) that penetrates the cylinder (1) at one end, and multiple corrugated rings (302) are arrayed along its length on the horizontal tube (301).

3. The biomass gas fuel steam boiler according to claim 1, characterized in that, One end of the cylinder (1) is sealed and the other end is open. The open end of the cylinder (1) is equipped with a flange (103). Two opposing semi-circular sealing plates (104) are connected to the flange (103) by bolts. The two semi-circular sealing plates (104) wrap around one end of the furnace liner (3).

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