Multi-return-stroke biomass steam boiler

Abstract

The utility model discloses a multi-return-stroke biomass steam boiler, which belongs to the field of steam boilers, and comprises a combustion chamber, a first boiler is fixedly connected above the combustion chamber, a separation sieve plate is fixedly connected in the combustion chamber, fossil fuel is replaced by renewable biomass materials such as straws, so that resources are saved, sustainable development is facilitated, and energy is saved. Flue gas generated in the combustion chamber heats liquid water through the first boiler and then heats the liquid through the second boiler, waste heat in the flue gas is convenient to use, waste is avoided, after steam is generated in the first boiler, the temperature of the liquid water in the first boiler is not increased any more, the flue gas in the heat conduction pipe is reversely heated, and the heat conduction efficiency is improved. After furnace ash in the combustion chamber is discharged, the second boiler is buried, heat of the furnace ash is used for heating the second boiler, heat preservation and heat insulation are conducted on the second boiler, when smoke in the smoke discharging pipe penetrates through the second boiler, the heating effect is better, and the second boiler can conveniently and rapidly generate steam.

Description

Technical Field

[0001] The utility model relates to the field of steam boilers, in particular to a multi-pass biomass steam boiler. Background Technique

[0002] Biomass, according to the definition of the International Energy Agency, refers to various organisms formed through photosynthesis, including all animals, plants, and microorganisms. When a steam boiler works, it needs to provide heat by burning fuel. Existing steam boilers mostly use fossil fuels when working. For example, the Chinese utility model patent with the publication number CN213272579U discloses a multi-pass structure gas steam boiler. This utility model greatly improves the efficiency of the boiler, reduces the emission of harmful gases, can increase the furnace temperature, reduces the consumption of gas, improves the utilization rate of heat energy, and saves costs.

[0003] However, this type of steam boiler will consume a large amount of fossil fuels. Fossil fuels are non-renewable resources, which is not conducive to the concept of sustainable development. Existing biomass materials, such as straw in farmland, are often wasted by burning. Therefore, applying renewable biomass materials, such as straw, to steam boilers is beneficial to saving resources and sustainable development. For this reason, this application proposes a multi-pass biomass steam boiler. Content of the Utility Model

[0004] The main purpose of the utility model is to provide a multi-pass biomass steam boiler, which can effectively solve the problems in the background technique.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A multi-pass biomass steam boiler includes a combustion chamber. A first boiler is fixedly connected above the combustion chamber. A partition sieve plate is fixedly connected inside the combustion chamber. A rotating rod is movably installed below the partition sieve plate inside the combustion chamber. A spiral blade is fixedly connected to the rotating rod. A feed box is fixedly connected to the side of the combustion chamber. The feed box is located above the partition sieve plate. A feed port is opened above the feed box. A pushing plate is movably installed inside the feed box. A heat conduction pipe is fixedly connected inside the first boiler. One end of the heat conduction pipe is fixedly connected to an exhaust pipe. A dust collection box is fixedly connected below the combustion chamber. A second boiler is fixedly connected inside the dust collection box. The exhaust pipe penetrates through the dust collection box and also penetrates through the dust collection box.

[0007] Preferably, an igniter is fixedly connected inside the combustion chamber. The igniter is located above the partition sieve plate. An ash outlet is fixedly connected to the side of the combustion chamber. The rotating rod and the spiral blade are movably installed in the ash outlet. The ash outlet is located above the dust collection box.

[0008] Preferably, the rotating rod is movably mounted on the combustion chamber through a No. 1 bearing, a mounting plate is fixedly connected to the ash collecting box, a stepper motor is fixedly connected to the mounting plate, the output shaft of the stepper motor is fixedly connected to one end of the rotating rod, a pushing cylinder is fixedly connected to the side wall of the feed box, and the output shaft of the pushing cylinder is fixedly connected to the pushing plate.

[0009] Preferably, a water inlet pipe No. 1 is fixedly connected to the No. 1 boiler, a steam exhaust port No. 1 is fixedly connected to the side of the No. 1 water inlet pipe, a drain pipe No. 1 is fixedly connected to the side of the No. 1 boiler, a smoke guide pipe is fixedly connected to the side of the combustion chamber, and the smoke guide pipe is fixedly connected to the heat conduction pipe.

[0010] Preferably, a support frame is fixedly connected to the side of the No. 1 boiler, and the lower end of the support frame is fixedly connected to the ash collecting box.

[0011] Preferably, a No. 2 water inlet pipe is fixedly connected to the No. 2 boiler, a No. 2 steam exhaust port is fixedly connected to the No. 2 boiler at a side position of the No. 2 water inlet pipe, a No. 2 drain pipe is fixedly connected to the side position of the No. 2 boiler, and the No. 2 drain pipe runs through the ash collecting box.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] In the utility model, after being processed, renewable biomass materials, such as straw, are put into a feed box, pushed into the No. 1 boiler by a push plate for incineration, and the liquid water in the No. 1 boiler at an upper position is heated to produce steam for utilization, and fossil fuels are replaced by renewable biomass materials, thereby saving resources and facilitating sustainable development;

[0014] In the utility model, the high-temperature flue gas generated by combustion is introduced into the No. 1 boiler through the smoke guide pipe and the heat conduction pipe to heat the liquid water therein, and then the flue gas is introduced into the smoke exhaust pipe to continue to heat the liquid water in the No. 2 boiler, so that the heat in the flue gas can be easily utilized in a multi-return manner, so that the residual heat in the flue gas can be easily utilized to avoid waste;

[0015] In the utility model, after a large amount of steam is generated in the No. 1 boiler, the temperature of the liquid water in the No. 1 boiler no longer increases, and the heat is reversely transferred to the flue gas through the smoke guide pipe. The spiral blades rotate to discharge a large amount of ash, and the No. 2 boiler is buried by the ash, so that the heat in the ash heats the No. 2 boiler, and thermal insulation is performed to reduce heat loss. After the smoke in the smoke exhaust pipe is heated by the liquid water in the No. 1 boiler, the temperature is higher, and then it passes through the No. 2 boiler, which has a better heating effect on the liquid water in the No. 2 boiler, so that steam can be generated faster in the No. 2 boiler. Brief Description of the Drawings

[0016] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0017] Figure 2 It is a schematic sectional view of the No. 1 boiler of the present utility model;

[0018] Figure 3 It is a schematic sectional view of the combustion chamber of the present utility model;

[0019] Figure 4 It is a schematic diagram of the ash collection box of the present utility model.

[0020] In the figure: 1, combustion chamber; 2, No. 1 boiler; 3, ash collection box; 4, partition sieve plate; 5, igniter; 6, rotating rod; 7, spiral blade; 8, ash outlet; 9, No. 1 bearing; 10, stepping motor; 11, feed box; 12, feed inlet; 13, pushing plate; 14, pushing cylinder; 15, No. 1 water inlet pipe; 16, No. 1 steam outlet; 17, No. 1 drain pipe; 18, smoke guide pipe; 19, heat conduction pipe; 20, smoke exhaust pipe; 21, support frame; 22, No. 2 boiler; 23, No. 2 water inlet pipe; 24, No. 2 steam outlet; 25, No. 2 drain pipe; 26, mounting plate. Detailed Embodiments

[0021] In order to make the technical means, creative features, achieved purposes and functions of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] Such as Figure 1 , Figure 2 and Figure 3As shown in the figure, a multi-pass biomass steam boiler includes a combustion chamber 1. A first boiler 2 is fixedly connected above the combustion chamber 1. A partition sieve plate 4 is fixedly connected inside the combustion chamber 1. A rotating rod 6 is movably installed below the partition sieve plate 4 inside the combustion chamber 1. A spiral blade 7 is fixedly connected to the rotating rod 6. A feed box 11 is fixedly connected to the side of the combustion chamber 1. The feed box 11 is located above the partition sieve plate 4. A heat conduction pipe 19 is fixedly connected inside the first boiler 2. One end of the heat conduction pipe 19 is fixedly connected to an exhaust pipe 20. An igniter 5 is fixedly connected inside the combustion chamber 1. The igniter 5 is located above the partition sieve plate 4. An ash outlet 8 is fixedly connected to the side of the combustion chamber 1. The rotating rod 6 and the spiral blade 7 are movably installed in the ash outlet 8. The ash outlet 8 is located above the ash collection box 3. The rotating rod 6 is movably installed with the combustion chamber 1 through a first bearing 9. An installation plate 26 is fixedly connected to the ash collection box 3. A stepping motor 10 is fixedly connected to the installation plate 26. The output shaft of the stepping motor 10 is fixedly connected to one end of the rotating rod 6. A first water inlet pipe 15 is fixedly connected to the first boiler 2. A first steam outlet 16 is fixedly connected to the side of the first boiler 2 where the first water inlet pipe 15 is located. A first drain pipe 17 is fixedly connected to the side of the first boiler 2. A smoke guide pipe 18 is fixedly connected to the side of the combustion chamber 1. The smoke guide pipe 18 is fixedly connected to the heat conduction pipe 19. A support frame 21 is fixedly connected to the side of the first boiler 2. The lower end of the support frame 21 is fixedly connected to the ash collection box 3. By introducing high-temperature flue gas into the heat conduction pipe 19, the liquid water in the first boiler 2 can be heated, enabling the liquid water in the first boiler 2 to boil rapidly. After the flue gas passes through the heat conduction pipe 19, it enters the exhaust pipe 20. The exhaust pipe 20 passes through the second boiler 22 at the lower position. The heat in the flue gas continues to heat the liquid water in the second boiler 22, facilitating the recovery and utilization of the waste heat in the flue gas. By using the first boiler 2 and the second boiler 22 to utilize the flue gas in multiple passes, the waste heat in the flue gas is not wasted.

[0023] As Figure 1 and Figure 3 shown, a feed inlet 12 is provided above the feed box 11. A push plate 13 is movably installed inside the feed box 11. A push cylinder 14 is fixedly connected to the side wall of the feed box 11. The output shaft of the push cylinder 14 is fixedly connected to the push plate 13. When the fuel enters the feed box 11, the push cylinder 14 pushes the fuel to the side, enabling the fuel to enter the combustion chamber 1, making it easier for the fuel to enter the combustion chamber 1.

[0024] As Figure 1 and Figure 4As shown in the figure, a dust collecting box 3 is fixedly connected to the lower position of the combustion chamber 1. A second boiler 22 is fixedly connected inside the dust collecting box 3. A smoke exhaust pipe 20 penetrates through the dust collecting box 3 and also penetrates through the dust collecting box 3. A second water inlet pipe 23 is fixedly connected to the second boiler 22. A second steam exhaust port 24 is fixedly connected to the side position of the second boiler 22 where the second water inlet pipe 23 is located. A second drain pipe 25 is fixedly connected to the side position of the second boiler 22, and the second drain pipe 25 penetrates through the dust collecting box 3. The second boiler 22 uses the furnace ash after fuel combustion to bury the outer shell, so that the heat in the furnace ash is convenient for reuse, and a heat preservation layer is formed on the outside of the second boiler 22 by using the furnace ash, which can better insulate the second boiler 22. After the first boiler 2 generates steam and continues to be heated, steam continues to be generated, but the temperature of the liquid no longer rises. At this time, after the flue gas passes through the heat conduction pipe 19, the liquid water heats the flue gas in the reverse direction, so that the flue gas remains at a high temperature. The high-temperature flue gas passes through the second boiler 22 buried by the furnace ash, so that the liquid water in it is convenient for rapid heating and steam is generated faster.

[0025] It should be noted that the present utility model is a multi-pass biomass steam boiler. Liquid water is added into the first boiler 2 and the second boiler 22 through the first water inlet pipe 15 and the second water inlet pipe 23. Renewable biomass materials, such as straw, etc., are put into the feed inlet 12 after being crushed and dried, and enter the feed box 11 through the feed inlet 12. The pushing cylinder 14 pushes the fuel to the side, so that the fuel enters the combustion chamber 1 and is located on the partition sieve plate 4. The igniter 5 is started to ignite the fuel, so that the fuel heats the first boiler 2 at the upper position, and the liquid water in the first boiler 2 gradually heats up. By replacing fossil fuels with renewable biomass materials, energy can be saved and sustainable development can be utilized. During the fuel combustion process, a large amount of high-temperature flue gas and high-temperature furnace ash will be generated. The high-temperature flue gas is introduced into the heat conduction pipe 19, which can heat the liquid water in the first boiler 2, so that the liquid water in the first boiler 2 boils rapidly. After the flue gas passes through the heat conduction pipe 19, it enters the smoke exhaust pipe 20. The smoke exhaust pipe 20 passes through the second boiler 22 at the lower position, and the heat in the flue gas continues to heat the liquid water in the second boiler 22, so that the waste heat in the flue gas is conveniently recycled and wasted is avoided. By rotating the rotating rod 6 through the stepping motor 10, the spiral blade 7 rotates. The ashes burning in the combustion chamber 1 pass downward through the partition sieve plate 4 and enter the position where the spiral blade 7 is located. They are pushed by the spiral blade 7 and discharged from the ash outlet 8 and fall into the ash collection box 3 below. The second boiler 22 is buried by the furnace ash, so that the heat in the furnace ash is conveniently used to heat the second boiler 22, and the furnace ash belongs to a heat preservation material and can insulate and heat the second boiler 22. When a large amount of steam is generated in the first boiler 2, the temperature of the liquid water no longer increases. After the flue gas in the heat conduction pipe 19 is reversely heated by the high-temperature liquid water, it then passes through the second boiler 22 through the smoke exhaust pipe 20, so that the heating effect of the liquid water in the second boiler 22 is better and steam can be quickly generated.

[0026] The above shows and describes the basic principles, main features and advantages of the present utility model. It is only a preferred embodiment of the present utility model, and its description is relatively specific and detailed, but it cannot be understood as a limitation to the scope of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. Without departing from the principles and purposes of the present utility model, various changes, modifications, substitutions and deformations can be made to the embodiments, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-pass biomass steam boiler, comprising a combustion chamber (1), and a first boiler (2) is fixedly connected above the combustion chamber (1), characterized in that: A partition sieve plate (4) is fixedly connected inside the combustion chamber (1). A rotating rod (6) is movably installed below the partition sieve plate (4) inside the combustion chamber (1). A spiral blade (7) is fixedly connected to the rotating rod (6). A feed box (11) is fixedly connected to the side of the combustion chamber (1). The feed box (11) is located above the partition sieve plate (4). A feed inlet (12) is provided above the feed box (11). A pushing plate (13) is movably installed inside the feed box (11). A heat conduction pipe (19) is fixedly connected inside the first boiler (2). One end of the heat conduction pipe (19) is fixedly connected to an exhaust pipe (20). A dust collection box (3) is fixedly connected to the lower position of the combustion chamber (1). A second boiler (22) is fixedly connected inside the dust collection box (3). The exhaust pipe (20) penetrates through the dust collection box (3) and also penetrates through the dust collection box (3).

2. The multi-pass biomass steam boiler according to claim 1, characterized in that: An igniter (5) is fixedly connected inside the combustion chamber (1). The igniter (5) is located above the partition sieve plate (4). An ash outlet (8) is fixedly connected to the side of the combustion chamber (1). The rotating rod (6) and the spiral blade (7) are movably installed in the ash outlet (8). The ash outlet (8) is located above the dust collection box (3).

3. The multi-pass biomass steam boiler according to claim 2, characterized in that: The rotating rod (6) is movably installed with the combustion chamber (1) through a first bearing (9). A mounting plate (26) is fixedly connected to the dust collection box (3). A stepping motor (10) is fixedly connected to the mounting plate (26). The output shaft of the stepping motor (10) is fixedly connected to one end of the rotating rod (6). A pushing cylinder (14) is fixedly connected to the side wall of the feed box (11). The output shaft of the pushing cylinder (14) is fixedly connected to the pushing plate (13).

4. A multi-pass biomass steam boiler according to claim 3, wherein: A first water inlet pipe (15) is fixedly connected to the first boiler (2). A first steam outlet (16) is fixedly connected to the side of the first boiler (2) at a position beside the first water inlet pipe (15). A first drain pipe (17) is fixedly connected to the side of the first boiler (2). A smoke guide pipe (18) is fixedly connected to the side of the combustion chamber (1). The smoke guide pipe (18) is fixedly connected to the heat conduction pipe (19).

5. A multi-pass biomass steam boiler according to claim 4, characterized in that: A support frame (21) is fixedly connected to the side of the first boiler (2). The lower end of the support frame (21) is fixedly connected to the dust collection box (3).

6. The multi-pass biomass steam boiler according to claim 5, wherein: A second water inlet pipe (23) is fixedly connected to the second boiler (22). A second steam outlet (24) is fixedly connected to the side of the second boiler (2) at a position beside the second water inlet pipe (23). A second drain pipe (25) is fixedly connected to the side of the second boiler (2), and the second drain pipe (25) penetrates through the dust collection box (3).

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