Biomass gasification boiler

Abstract

The invention relates to a biomass gasification boiler which comprises a boiler body and a steam pipeline arranged in the boiler body. The steam pipeline comprises a first steam outlet pipe, a second steam outlet pipe, a water supply pipe, a first steam branch pipe and a second steam branch pipe; the first steam outlet pipe and the second steam outlet pipe are arranged at the top of the boiler body; at least two water supply pipes, at least two first steam branch pipes and at least two second steam branch pipes are arranged along the inner wall of the boiler body. The first steam branch pipe is simultaneously connected with a water supply pipe and a first steam outlet pipe at the bottom of the boiler body; the second steam branch pipe is simultaneously connected with a water supply pipe and a second steam outlet pipe at the bottom of the boiler body; a communicating pipe is arranged between the first steam outlet pipe and the second steam outlet pipe; and the communicating pipe is simultaneously connected with the first steam outlet pipe and the second steam outlet pipe. Smoke generated after biomass fuel is combusted directly heats water along the pipeline to generate water vapor, two sets of shells do not need to be arranged, heat loss is reduced, and the use cost of equipment is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of boiler, in particular to a biomass gasification boiler. BACKGROUND

[0002] In China, nearly 8 billion tons of agricultural and forestry waste are generated every year. Methane is released during the decomposition of these biomasses, and open burning of these biomasses will release carbon monoxide, volatile organic compounds and other pollutants into the air. In order to effectively utilize resources and protect the environment, biomass fuel can be collected and crushed, and then combusted in subsequent stages to reduce the generation of nitrogen oxides and collect heat.

[0003] The existing biomass fuel can be processed by a combination of a gasification furnace and a gas boiler. The biomass fuel is combusted in the gasification furnace, and the hot air generated by the combustion is introduced into the gas boiler through a flue gas pipeline to heat other energy storage media. This split structure of the gasification furnace and the gas boiler has two independent housings, a large total heat dissipation area, and a large heat loss. Moreover, the hot air generated by the combustion in the gasification furnace needs to be introduced into the gas boiler through a flue gas pipeline, and the hot air flowing along the flue gas pipeline further loses heat, reducing the energy utilization rate. The two independent housings and the connection structure between them also increase the structural complexity of the biomass fuel processing system and increase the cost of the system. It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present disclosure, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. SUMMARY

[0004] In view of the shortcomings of the prior art, the purpose of the present application is to provide a biomass gasification boiler to simplify the biomass fuel processing system.

[0005] The technical solution of the present application is as follows: The biomass gasification boiler comprises a boiler body and a steam pipeline arranged in the boiler body. The steam pipeline comprises a first steam outlet pipe, a second steam outlet pipe, a water supply pipe connected to the inner wall of the boiler body, a first steam branch pipe and a second steam branch pipe arranged at the top of the boiler body. Along the inner wall of the boiler body, the water supply pipe, the first steam branch pipe and the second steam branch pipe are arranged in at least two. The first steam branch pipe is connected to the water supply pipe and the first steam outlet pipe at the bottom of the boiler body. The second steam branch pipe is connected to the water supply pipe and the second steam outlet pipe at the bottom of the boiler body. A communication pipe is further arranged between the first steam outlet pipe and the second steam outlet pipe. The communication pipe is connected to the first steam outlet pipe and the second steam outlet pipe.

[0006] Further, two first steam outlet pipes are arranged. Each first steam outlet pipe is connected to a different first steam branch pipe.

[0007] Further, the second steam outlet pipe is arranged on the boiler body and directly connected with the water feeding pipe.

[0008] Further, the main steam pipe is arranged, the main steam pipe is connected with the first steam outlet pipe and the first steam branch pipe, and all the first steam branch pipes are connected with the same main steam pipe.

[0009] Further, the reciprocating grate is arranged, the reciprocating grate extends into the bottom of the boiler body, and the fuel is arranged on the reciprocating grate.

[0010] Further, the slag discharge port is arranged on the end of the reciprocating grate and the boiler body.

[0011] Further, the base is arranged, the waste chamber is arranged in the base, and the ash chute is arranged in the base, the open end of the ash chute is aligned with the slag discharge port.

[0012] Further, the discharge conveyor belt is arranged in the waste chamber and aligned with the bottom opening of the ash chute.

[0013] Further, the discharge valve is arranged on the ash chute.

[0014] Further, the chimney is arranged on the top of the boiler body.

[0015] The beneficial technical effects of the present application are as follows: (1) The biomass gasification boiler in the present application directly heats water along the pipeline to generate water vapor after combustion, without arranging two sets of shells, reducing heat loss and reducing the use cost of the equipment. At least two water feeding pipes are uniformly arranged along the inner wall of the boiler body, so that the liquid in the water feeding pipe uniformly absorbs heat, ensuring the consistency of the dryness of the generated steam from the source. In addition, at least two first steam branch pipes and at least two second steam branch pipes are circumferentially and uniformly arranged on the inner wall of the boiler body. The first steam branch pipe and the second steam branch pipe are connected with the water feeding pipe to absorb steam from different positions, mix and send into the first steam outlet pipe and the second steam outlet pipe, further ensuring the uniformity of the dryness of the steam in the first steam outlet pipe and the second steam outlet pipe. In addition, the first steam outlet pipe and the second steam outlet pipe are connected through the communication pipe to mix the steam in the first steam outlet pipe and the second steam outlet pipe, ensuring the uniformity of the dryness of the steam discharged from the first steam outlet pipe and the second steam outlet pipe.

[0016] (2) Further, two first steam extraction pipes can be provided to increase the steam extraction positions so as to supply steam to different devices at the same time, improving the practicality of the biomass gasification boiler. On the other hand, when one of the plurality of steam extraction ports is blocked, the steam output of the biomass gasification boiler is not affected, avoiding the influence of the failure of a single first steam extraction pipe on the output of the overall biomass gasification boiler.

[0017] (3) Further, the first steam extraction pipe and the first steam branch pipe are connected through a main steam pipe, and the main steam pipe connects all the first steam branch pipes. Steam valves, safety valves or pressure gauges and the like are arranged on the first steam branch pipes, so that the steam flow of the first steam extraction pipe can be conveniently adjusted, the steam state can be detected, and the system safety can be ensured. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 FIG. 1 shows a schematic diagram of the internal structure of the biomass gasification boiler in the front view according to an embodiment of the present disclosure.

[0019] Markings in the drawings: 1, boiler body; 11, chimney; 2, reciprocating grate; 3, slag discharge port; 4, water inlet; 5, steam pipeline; 51, feedwater pipe; 52, first steam branch pipe; 53, second steam branch pipe; 54, first steam extraction pipe; 55, second steam extraction pipe; 56, communication pipe; 57, main steam pipe; 6, base; 61, discharge conveyor belt; 62, waste chamber; 63, ash hopper; 631, discharge valve. DETAILED DESCRIPTION

[0020] For the purposes of this disclosure, the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the drawings, which are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0021] In the description of the present application, the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, which are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0022] Figure 1 The internal structure of the biomass gasification boiler in the front view direction is shown. Please refer to Figure 1 , the biomass gasification boiler includes a boiler body 1 and a steam pipeline 5 arranged in the boiler body 1. The steam pipeline 5 includes a first steam outlet pipe 54, a second steam outlet pipe 55, a water supply pipe 51 circumferentially connected to the inner wall of the boiler body 1, a first steam branch pipe 52 and a second steam branch pipe 53 arranged at the top of the boiler body 1. Along the inner wall of the boiler body 1, the water supply pipe 51, the first steam branch pipe 52 and the second steam branch pipe 53 are arranged at least two respectively. The water supply pipe 51 is uniformly arranged with two along the inner wall of the boiler body 1, so that the liquid in the water supply pipe 51 uniformly absorbs heat, and the consistency of the dryness of the generated steam is guaranteed from the source. Specifically, the water inlet 4 is arranged on the boiler body 1, and the water inlet 4 is connected to the water supply pipe 51.

[0023] Specifically, the biomass gasification boiler further includes a reciprocating grate 2 and a base 6. The reciprocating grate 2 extends into the bottom of the boiler body 1. The fuel is arranged on the reciprocating grate 2, and the electric igniter (not shown in the figure) is arranged on the boiler body 1 to ignite the fuel. The flue gas generated after the combustion of the material on the reciprocating grate 2 can directly heat the water in the pipeline in the boiler body 1 to generate water vapor, without the need to arrange two sets of shell, reducing the loss of heat and reducing the use cost of the equipment. In some embodiments, the reciprocating grate 2 can adopt the commercially available DZW series inclined reciprocating grate 2. The boiler body 1 at the end of the reciprocating grate 2 is provided with a slag discharge port 3, and the base is provided with a waste chamber 62 and a hopper 63. The open end of the hopper 63 is aligned with the slag discharge port 3. The ash after combustion on the reciprocating grate 2 can be discharged from the boiler body 1 along the slag discharge port 3 and the hopper 63, avoiding the accumulation of ash in the boiler body 1. At the same time, the top of the boiler body 1 is provided with a chimney 11, and the exhaust gas after heat exchange can be discharged from the boiler body along the chimney 11.

[0024] Preferably, the waste chamber 62 can also be provided with a discharge conveyor belt 61, and the discharge conveyor belt 61 is arranged in alignment with the bottom opening of the hopper 63. The ash in the waste chamber 62 can be discharged along the discharge conveyor belt 61. In some embodiments, the hopper 63 can also be provided with a discharge valve 631 to control the opening and closing of the hopper 63, thereby improving the flexibility of discharging waste of the biomass gasification boiler.

[0025] Please refer to Figure 1The first steam branch pipe 52 is connected with the water supply pipe 51 and the first steam outlet pipe 54 at the bottom of the boiler body 1. In some embodiments, a main steam pipe 57 is further provided. The main steam pipe 57 is connected with the first steam outlet pipe 54 and the first steam branch pipe 52. All the first steam branch pipes 52 are connected with the same main steam pipe 57. The steam valve, safety valve or pressure gauge and other devices are arranged on the first steam branch pipe 52, which can conveniently adjust the steam flow of the first steam outlet pipe 54, detect the steam state and ensure the system safety. The main steam pipe 57 and the first steam outlet pipe 54, and the main steam pipe 57 and the first steam branch pipe 52 can be welded.

[0026] Preferably, the second steam branch pipe 53 is connected with the water supply pipe 51 and the second steam outlet pipe 55 at the bottom of the boiler body 1. At least two first steam branch pipes 52 and at least two second steam branch pipes 53 are arranged uniformly in the circumference, so as to absorb steam from different positions, mix and send into the first steam outlet pipe 54 and the second steam outlet pipe 55, further ensuring the uniformity of the steam dryness in the first steam outlet pipe 54 and the second steam outlet pipe 55.

[0027] Please refer to Figure 1 The communication pipe 56 is further arranged between the first steam outlet pipe 54 and the second steam outlet pipe 55. The communication pipe 56 is connected with the first steam outlet pipe 54 and the second steam outlet pipe 55, so as to mix the steam in the first steam outlet pipe 54 and the second steam outlet pipe 55, and ensure the uniformity of the steam discharged from the first steam outlet pipe 54 and the second steam outlet pipe 55. In some embodiments, the second steam outlet pipe 55 is arranged on the boiler body 1, so as to stably support the second steam outlet pipe 55. The communication pipe 56 connected with the first steam outlet pipe 54 and the second steam outlet pipe 55 can also better support the first steam outlet pipe 54. The second steam outlet pipe 55 can be directly connected with the water supply pipe 51.

[0028] Preferably, two first steam outlet pipes 54 are arranged, so as to increase the steam discharge position, facilitate the steam supply to different devices at the same time, and improve the practicability of the biomass gasification boiler. On the other hand, the arrangement of multiple steam discharge outlets does not affect the steam output of the biomass gasification boiler when one steam discharge outlet is blocked, which avoids the influence of the failure of a single first steam outlet pipe 54 on the output of the whole biomass gasification boiler. Each first steam outlet pipe 54 is connected with different first steam branch pipes 52.

[0029] The specific working process of the present application is as follows: Water is added into the water tube 51 through the water inlet 4 and the reciprocating grate 2 is started. The biomass material is combusted on the reciprocating grate 2 and is pushed by the reciprocating grate 2 to move towards the slagging port 3. The biomass material generates heat when combusting and the heat heats the liquid in the water tube 51 until the liquid in the water tube 51 is heated to be steam. The steam flows upwards along the first steam branch pipe 52 and the second steam branch pipe 53, wherein the steam in the first steam branch pipe 52 flows into the first steam outlet pipe 54 along the main steam pipe 57 and the steam in the second steam branch pipe 53 flows into the second steam outlet pipe 55. The steam in the first steam outlet pipe 54 and the second steam outlet pipe 55 mixes with each other along the communication pipe 56 and is discharged through the pipe openings of the first steam outlet pipe 54 and the second steam outlet pipe 55. On the other hand, the gas generated when the biomass material is combusted is discharged from the boiler body 1 through the chimney 11 and the waste residue generated after the biomass material is combusted is discharged through the slagging port 3, the ash hopper 63 and the conveyor belt.

[0030] The technical features of the above-described embodiments can be combined in any manner. For the sake of brevity, not all possible combinations are described, but it should be understood that the scope of the present disclosure includes all such possible combinations.

[0031] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be pointed out that, for those skilled in the art, some modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A biomass gasification boiler, characterized in that, The biomass gasification boiler includes a boiler body and steam pipelines installed within the boiler body. The steam pipelines include a first steam outlet pipe and a second steam outlet pipe installed at the top of the boiler body, a water supply pipe circumferentially connected to the inner wall of the boiler body, a first steam branch pipe, and a second steam branch pipe. At least two of each of the water supply pipe, the first steam branch pipe, and the second steam branch pipe are installed along the inner wall of the boiler body. The first steam branch pipe is connected to both the water supply pipe and the first steam outlet pipe at the bottom of the boiler body. The second steam branch pipe is connected to both the water supply pipe and the second steam outlet pipe at the bottom of the boiler body. A connecting pipe is also installed between the first steam outlet pipe and the second steam outlet pipe. The connecting pipe connects both the first steam outlet pipe and the second steam outlet pipe.

2. The biomass gasification boiler as described in claim 1, characterized in that: Two first steam outlet pipes are provided; each first steam outlet pipe is connected to a different first steam branch pipe.

3. The biomass gasification boiler as described in claim 1, characterized in that: The second steam outlet pipe is installed on the boiler body and is directly connected to the water supply pipe.

4. The biomass gasification boiler as described in claim 1, characterized in that: It is also equipped with a main steam pipe; the main steam pipe is connected to both the first steam outlet pipe and the first steam branch pipe; all the first steam branch pipes are connected to the same main steam pipe.

5. The biomass gasification boiler as described in claim 1, characterized in that: It is also equipped with a reciprocating grate; the reciprocating grate extends into the bottom of the boiler body; fuel is disposed on the reciprocating grate.

6. The biomass gasification boiler as described in claim 5, characterized in that: A slag discharge port is provided on the boiler body at the end of the reciprocating grate.

7. The biomass gasification boiler as described in claim 6, characterized in that: It is also equipped with a base, in which a waste chamber is opened and an ash hopper is provided; the open end of the ash hopper is aligned with the slag discharge port.

8. The biomass gasification boiler as described in claim 7, characterized in that: Align the bottom opening of the ash hopper with the waste chamber, and a discharge conveyor belt is also provided inside the waste chamber.

9. The biomass gasification boiler as described in claim 7, characterized in that: The ash hopper is equipped with a discharge valve.

10. The biomass gasification boiler as described in claim 1, characterized in that: The boiler body has an opening on one side of its top and a chimney is installed thereon.

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