Fluidized bed gasification furnace capable of recycling waste heat

Abstract

The utility model discloses a fluidized bed gasification furnace capable of recycling waste heat, which relates to the technical field of fluidized bed gasification furnaces and comprises a main body furnace and a recycling mechanism, and the recycling mechanism for recycling waste heat is arranged on the outer surface of the main body furnace. And the recycling mechanism comprises a first wrapping cover, a first spiral pipe, a communicating pipe, a heat conduction layer, a second wrapping cover, a second spiral pipe and an eduction pipe, the first spiral pipe is arranged in the middle of the inner side of the first wrapping cover, and the communicating pipe is connected to the upper portion of the first spiral pipe. Compared with an existing device, the fluidized bed gasification furnace capable of recycling waste heat has the advantages that through cooperation of all parts of the recycling mechanism, diffused heat can be absorbed during circulation of water, so that the water is heated, the heated water flows out of the eduction pipe for utilization, meanwhile, the waste heat recycling area and effect can be guaranteed, and the waste heat recycling effect is improved. And heat can be prevented from being directly diffused outwards, so that the temperature of the working environment is increased, and energy loss is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of fluidized bed gasifiers, in particular to a fluidized bed gasifier capable of recovering waste heat. Background Art

[0002] Fluidized bed gasifier uses gasification medium as fluidization medium to make biomass undergo gasification reaction in a suspended flow state. With the continuous development and innovation of biomass gasifiers, the energy of biomass gasifiers can be better utilized.

[0003] When the existing fluidized bed gasifier is in use, the heat generated inside the gasifier tends to diffuse outwards, and the existing furnace body cannot recover the diffused heat well, which will cause the temperature of the working environment to rise and energy loss.

[0004] Therefore, the existing structure and defects are studied and improved, and a fluidized bed gasification furnace capable of recovering waste heat is provided, in order to achieve a more practical purpose. Utility Model Content

[0005] The purpose of the utility model is to provide a fluidized bed gasifier capable of recovering waste heat, so as to solve the problem mentioned in the above background technology that when the existing fluidized bed gasifier is in use, the heat from its internal working tends to diffuse outward, and the existing furnace body cannot recover the diffused heat well, which causes the temperature of the working environment to increase and causes energy loss.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fluidized bed gasification furnace capable of recovering waste heat, comprising a main furnace and a recovery mechanism, wherein the recovery mechanism for recovering waste heat is arranged on the outer surface of the main furnace, and the recovery mechanism comprises a first wrapping cover, a first spiral tube, a connecting tube, a heat-conducting layer, a second wrapping cover, a second spiral tube and a guide tube, a first spiral tube is arranged in the middle of the inner side of the first wrapping cover, and a connecting tube is connected to the top of the first spiral tube, a heat-conducting layer is arranged on the inner side of the first wrapping cover, a second wrapping cover is connected to the top of the connecting tube, and a second spiral tube is arranged inside the second wrapping cover, and a guide tube is connected to the top of one side of the second spiral tube.

[0007] Furthermore, the first spiral tube is connected to the second spiral tube through a connecting tube, and a feed port is provided in the middle of the surface of the main furnace.

[0008] Furthermore, an air outlet is connected to the upper middle portion of the main furnace, and a ventilation mechanism for stabilizing air outlet is provided on the lower inner side of the main furnace.

[0009] Furthermore, the ventilation mechanism includes an air duct and an air outlet, and the air outlet is installed in the upper middle part of the air duct.

[0010] Furthermore, the ventilation mechanism also includes a support frame, and the support frame is installed in the upper middle part of the air outlet.

[0011] Furthermore, the ventilation mechanism also includes a shielding mesh plate, and the shielding mesh plate is fixed on the top of the support frame.

[0012] Compared with the prior art, the utility model provides a fluidized bed gasification furnace capable of recovering waste heat, which has the following beneficial effects:

[0013] 1. The utility model can absorb the diffused heat to heat the water when the water circulates through the cooperation between the various parts of the recovery mechanism, and let the heated water flow out from the outlet pipe for use. At the same time, it can ensure the area and effect of waste heat recovery, and can prevent the heat from directly diffusing outwards to increase the temperature of the working environment and cause energy loss;

[0014] 2. The utility model can block the settled materials through the cooperation between the various parts of the ventilation mechanism to prevent the materials from falling directly into the air outlet, causing the air outlet to be blocked and affecting the gasification effect of the air outlet. At the same time, it can avoid interference with the air outlet to ensure a stable gasification effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall external three-dimensional structure of a fluidized bed gasifier capable of recovering waste heat according to the utility model;

[0016] Figure 2 This is a partial front view structural diagram of the main furnace of a fluidized bed gasification furnace capable of recovering waste heat according to the utility model;

[0017] Figure 3 The utility model is a fluidized bed gasification furnace capable of recovering waste heat. Figure 2 The enlarged structural diagram at A in the middle;

[0018] Figure 4 The utility model is a front view structural schematic diagram of a ventilation mechanism of a fluidized bed gasifier capable of recovering waste heat.

[0019] In the figure: 1. main furnace; 2. feed inlet; 3. air outlet; 4. recovery mechanism; 401. first wrapping cover; 402. first spiral tube; 403. connecting tube; 404. heat conducting layer; 405. second wrapping cover; 406. second spiral tube; 407. outlet pipe; 5. ventilation mechanism; 501. air guide tube; 502. air outlet; 503. support frame; 504. shielding mesh plate. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field of the present invention; the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0022] like Figure 1-Figure 3 As shown, a fluidized bed gasification furnace capable of recovering waste heat comprises a main furnace 1 and a recovery mechanism 4, the recovery mechanism 4 for recovering waste heat is arranged on the outer surface of the main furnace 1, the recovery mechanism 4 comprises a first wrapping cover 401, a first spiral tube 402, a connecting tube 403, a heat-conducting layer 404, a second wrapping cover 405, a second spiral tube 406 and an outlet tube 407, the first wrapping cover 401 is provided with a first spiral tube 402 in the middle of the inner side, and the connecting tube 403 is connected above the first spiral tube 402, the first wrapping cover 401 is provided with a heat-conducting layer 404, the connecting tube 403 is connected with a second wrapping cover 405, and the second wrapping cover 405 is provided with a second spiral tube 406 inside, and the outlet tube 407 is connected above one side of the second spiral tube 406, the first spiral tube 402 is connected with the second spiral tube 406 through the connecting tube 403, and the feeding port 2 is provided in the middle of the surface of the main furnace 1;

[0023] The heat diffused outwards by the main furnace 1 when it is working can be transferred to the first spiral tube 402 in the first wrapping cover 401 through the heat conductive layer 404. The first spiral tube 402 is supplied with water from a water source outside the furnace body. When the water circulates, the diffused heat can be absorbed to heat the water. The second spiral tube 406 inside the second wrapping cover 405 can absorb the residual heat diffused by the gas in the gas outlet 3, so that the heated water can flow out from the outlet pipe 407 for use, thereby ensuring the area and effect of waste heat recovery, and preventing the heat from directly diffusing outwards to increase the temperature of the working environment and cause energy loss.

[0024] like Figure 1 and Figure 4As shown, an air outlet 3 is connected to the upper middle part of the main furnace 1, and a ventilation mechanism 5 for stabilizing air outlet is arranged on the lower inner side of the main furnace 1. The ventilation mechanism 5 includes an air guide duct 501 and an air outlet 502. The air guide duct 501 is provided with the air outlet 502 in the upper middle part. The ventilation mechanism 5 also includes a support frame 503. The support frame 503 is provided with the air outlet 502 in the upper middle part. The ventilation mechanism 5 also includes a shielding mesh plate 504. The shielding mesh plate 504 is fixed on the top of the support frame 503. The mesh-shaped shielding screen 504 can block the settled materials when the air duct 501 and the air outlet 502 are in the blowing and gasification operation, so as to prevent the materials from falling directly into the air outlet 502, thereby clogging the air outlet 502 and affecting the air outlet gasification effect. At the same time, the support frame 503 is used to maintain a distance between the shielding screen 504 and the air outlet 502, and the ventilated shielding screen 504 can avoid interference with the air outlet to ensure a stable gasification effect.

[0025] Working principle: When using the fluidized bed gasification furnace capable of recovering waste heat, firstly, the heat diffused outward by the main furnace 1 when it is working can be transferred to the first spiral tube 402 in the first wrapping cover 401 through the heat conductive layer 404, and then the first spiral tube 402 is supplied with water from the water source outside the furnace body, and can absorb the diffused heat when the water circulates to heat the water, and then the waste heat diffused by the gas in the air outlet 3 can be absorbed by the second spiral tube 406 inside the second wrapping cover 405, so that the heated water can flow out from the outlet pipe 407 for utilization, at this time, through the mesh-shaped shielding screen 504, when the air duct 501 and the air outlet 502 are blowing and gasifying, the settled materials can be blocked to prevent the materials from falling directly into the air outlet 502, and finally, the support frame 503 is used to keep a distance between the shielding screen 504 and the air outlet 502, as well as the ventilated shielding screen 504, to avoid interference with the air outlet.

[0026] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fluidized bed gasification furnace capable of recovering waste heat, comprising a main furnace (1) and a recovery mechanism (4), characterized in that: The recovery mechanism (4) for waste heat recovery is arranged on the outer surface of the main furnace (1), and the recovery mechanism (4) comprises a first wrapping cover (401), a first spiral tube (402), a connecting tube (403), a heat-conducting layer (404), a second wrapping cover (405), a second spiral tube (406) and an outlet tube (407). The first spiral tube (402) is arranged in the middle of the inner side of the first wrapping cover (401), and the connecting tube (403) is connected to the top of the first spiral tube (402). The heat-conducting layer (404) is arranged on the inner side of the first wrapping cover (401), the connecting tube (403) is connected to the second wrapping cover (405), and the second spiral tube (406) is arranged inside the second wrapping cover (405), and the outlet tube (407) is connected to the top of one side of the second spiral tube (406).

2. The fluidized bed gasifier capable of recovering waste heat according to claim 1, characterized in that: The first spiral tube (402) is connected to the second spiral tube (406) via a connecting tube (403), and a feed port (2) is provided in the middle of the surface of the main furnace (1).

3. The fluidized bed gasifier capable of recovering waste heat according to claim 1, characterized in that: An air outlet (3) is connected to the upper middle portion of the main furnace (1), and a ventilation mechanism (5) for stabilizing air outlet is provided on the lower inner side of the main furnace (1).

4. The fluidized bed gasifier capable of recovering waste heat according to claim 3, characterized in that: The ventilation mechanism (5) comprises an air guide pipe (501) and an air outlet (502), and the air outlet (502) is installed in the upper middle part of the air guide pipe (501).

5. The fluidized bed gasifier capable of recovering waste heat according to claim 4, characterized in that: The ventilation mechanism (5) further comprises a support frame (503), and the support frame (503) is installed in the middle part above the air outlet (502).

6. The fluidized bed gasifier capable of recovering waste heat according to claim 5, characterized in that: The ventilation mechanism (5) further comprises a shielding mesh plate (504), and the shielding mesh plate (504) is fixed on the top of the support frame (503).

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