Biomass gasification furnace

Abstract

The utility model provides a biomass gasification furnace which comprises a furnace body and a feeding device, the feeding device is located above the furnace body, and a blanking port is formed in the top of the furnace body; the feeding device comprises a stock bin, a feeding mechanism, an upper sealing cover mechanism and a lower sealing cover mechanism. The stock bin comprises a hopper and a feeding pipe. A feeding hole is formed in the top of the hopper; the upper sealing cover mechanism is arranged at the feeding hole; the feeding pipe transversely penetrates through the left and right side walls of the hopper, and the bottom end of the feeding pipe is lower than the bottom end of the hopper; the feeding pipe comprises a hopper outer part located in the hopper, and the hopper inner part of the feeding pipe is cut off so as to be matched with the hopper to form a unified inner cavity. The feeding mechanism comprises a shaftless auger, the shaftless auger comprises a spiral blade, the spiral blade is arranged in a feeding pipe, the rear end of the feeding pipe is a motor end, and the front end of the feeding pipe is a discharging port; a driving motor of the shaftless auger is arranged outside the motor end of the feeding pipe; the blanking port is positioned below the front part of the discharge port; and the lower sealing cover mechanism is arranged at the discharge hole.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of biomass gasification furnaces. BACKGROUND

[0002] At present, whether adopting atmospheric pressure, negative pressure or positive pressure operation in biomass gasification process, the leakage problem of gasification products (mainly combustible gas such as CO) needs to be solved, and the feed inlet of the gasification furnace is a key position, which needs to ensure good sealing performance of the feed inlet.

[0003] Chinese patent 201420134746.7 discloses a kind of gasification furnace fuel into furnace, sealing, conveying device, including distribution screw feeder, vibrating screen, magnet, main conveying belt, bunker camera, bunker, gasification furnace, bunker steam fire control pipeline and valve, variable frequency screw feeder, sealing star feeder, high-speed screw feeder, air blower, gas induced draft fan, vibrating screen is connected with distribution screw feeder, vibrating screen is equipped with vibration motor, distribution screw feeder is connected with bunker by main conveying belt, the bottom discharge port of bunker is connected with variable frequency screw feeder, variable frequency screw feeder is connected with high-speed screw feeder by sealing star feeder, high-speed screw feeder is connected with the feed inlet of gasification furnace, air blower and gas induced draft fan are connected with gasification furnace.

[0004] Chinese patent 201920440820.0 discloses a kind of gasification device of biomass gasification furnace's feed structure, the feed structure of biomass gasification furnace includes: biomass gasification furnace;Bunker, containing raw materials;First sealing mechanism, connected between the discharge port of the bunker and the feed inlet of the biomass gasification furnace, adapted to prevent combustible gas in the biomass gasification furnace from entering the first sealing mechanism, the raw materials are conveyed into the biomass gasification furnace by the first sealing mechanism.

[0005] Chinese patent application 202310351647.8 discloses a kind of biomass gasification furnace screw pressurizing feed device, including biomass gasification furnace, further including: second feeding pipe, communicate with biomass gasification furnace through bunker, the feeding cavity in the second feeding pipe is tapered, its feed end is thick end, and the discharge end is narrow end.

[0006] The defects of the above technical solutions are that the feed quantity is uncontrollable, the sealing performance is poor, and the pressure in the furnace is unstable. UTILITY MODEL CONTENT

[0007] The main purpose of the utility model is to provide a kind of feeding device to solve the deficiencies in the prior art.

[0008] In order to achieve the above main purpose, the utility model provides a kind of biomass gasification furnace, which includes furnace body and feeding device, the feeding device is located above the furnace body, and the top of the furnace body is provided with a drop port.

[0009] The feeding device comprises a hopper, a feeding mechanism, an upper sealing cover mechanism and a lower sealing cover mechanism.

[0010] The feeding pipe horizontally passes through the left and right sidewalls of the hopper, and the bottom end of the feeding pipe is lower than the bottom end of the hopper.

[0011] The feeding mechanism comprises a shaftless auger, and the shaftless auger comprises helical blades.

[0012] The lower sealing cover mechanism is arranged at the discharge port.

[0013] In the utility model, the shaftless auger comprises a driving motor, a driving shaft and helical blades.

[0014] In the utility model, the top of the hopper is provided with an inlet and an upper sealing cover mechanism.

[0015] In the utility model, the discharge port of the feeding pipe is provided with a lower sealing cover mechanism.

[0016] In the utility model, the discharge port of the feeding pipe is provided with a lower sealing cover mechanism.

[0017] In the utility model, the discharge port of the feeding pipe is provided with a lower sealing cover mechanism.

[0018] According to another specific embodiment of the utility model, the upper sealing cover mechanism comprises an upper sealing cover driven by an upper air cylinder and an upper guide rail.

[0019] According to another specific embodiment of the present application, the upper sealing cover is a horizontal cover, and the upper air cylinder drives horizontally.

[0020] According to another specific embodiment of the present application, the lower sealing cover mechanism comprises a lower sealing cover driven by a lower air cylinder.

[0021] According to another specific embodiment of the present application, the lower sealing cover is a vertical cover, and the lower air cylinder drives horizontally.

[0022] According to another specific embodiment of the present application, the feeding device further comprises a sealing cover, the feeding pipe extends into the sealing cover, the discharge port is located in the sealing cover, and the lower sealing cover moves in the sealing cover; the bottom of the sealing cover is provided with an opening; and the opening in the bottom of the sealing cover is aligned with and connected to the discharging port of the furnace body. In the present application, the sealing cover covers the discharge port, and the lower sealing cover moves in the sealing cover, thereby achieving two-stage sealing of the discharge port. Through two-stage sealing of the discharge port, the air tightness of the system can be improved, and the pressure in the furnace can be kept stable.

[0023] According to another specific embodiment of the present application, the sealing cover is provided with at least one maintenance hole. Preferably, two maintenance holes are provided, one in the top plate and one in the side plate. The maintenance holes can be opened to deal with blockage of the discharge port and the like.

[0024] The present application has the following beneficial effects:

[0025] The feeding device of the present application can realize precise control of the feeding amount, has good sealing performance, and can keep the pressure in the furnace stable.

[0026] In order to more clearly illustrate the purpose, technical scheme and advantages of the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a structural schematic diagram of an embodiment of the present application;

[0028] Figure 2 is another structural schematic diagram of an embodiment of the present application;

[0029] Figure 3 is a structural schematic diagram of a feeding device in an embodiment;

[0030] Figure 4 is a sectional view of the longitudinal section of the feeding device screw conveyor shaft;

[0031] Figure 5 is a structural schematic diagram of a hopper in an embodiment;

[0032] Figure 6 is a structural schematic diagram of a shaftless screw conveyor in an embodiment. Detailed Implementation

[0033] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0034] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0035] Example

[0036] like Figures 1-6 As shown, this embodiment provides a biomass gasification furnace, which includes a furnace body 1 and a feeding device 2. The feeding device 2 is located above the furnace body 1, and the top of the furnace body 1 is provided with a material discharge port 101.

[0037] The feeding device 2 includes a hopper 3, a feeding mechanism 4, an upper sealing cover mechanism 5, a lower sealing cover mechanism 6, and a sealing cover 7.

[0038] The hopper 3 includes a hopper 301 and a feeding pipe 302; the hopper 301 is wider at the top and narrower at the bottom (the upper part is a cuboid and the lower part is a triangular prism), and the top of the hopper 301 is provided with a feeding inlet 303; the upper sealing cover mechanism 5 is provided at the feeding inlet 303. The feeding pipe 302 runs through the left and right side walls of the hopper 301, and the bottom end of the feeding pipe 302 is lower than the bottom end of the hopper 301; the feeding pipe 302 includes an outer portion located inside the hopper 301, and the inner portion of the feeding pipe 302 is cut off to cooperate with the hopper 301 to form a unified inner cavity.

[0039] The feeding mechanism 4 includes a shaftless auger, which includes a drive motor 401, a drive shaft 402, and spiral blades 403. The drive shaft 402 does not penetrate the entire spiral blades 403, but only connects to the first-stage spiral blades. The spiral blades 403 are disposed inside the feeding pipe 302, with the rear end of the feeding pipe 302 being the motor end and the front end being the discharge port 304. The drive motor 401 of the shaftless auger is disposed outside the motor end of the feeding pipe 302. The discharge port 101 is located in front of and below the discharge port 304.

[0040] The upper sealing cover mechanism 5 includes an upper sealing cover 502 driven by an upper cylinder 501, and an upper guide rail 503, which is located at the edge of the feed inlet 303. The upper sealing cover 502 is a horizontal cover, and the upper cylinder 501 drives it laterally.

[0041] The lower sealing cover mechanism 6 is arranged at the discharge port 304, and comprises a lower sealing cover 602 driven by a lower air cylinder 601.

[0042] The feeding pipe 302 extends into the sealing cover 7, the discharge port 304 is located in the sealing cover 7, and the lower sealing cover 602 moves in the sealing cover 7; the bottom of the sealing cover 7 is provided with an opening; the bottom opening 701 of the sealing cover 7 is aligned with and connected to the material falling port 101 of the furnace body 1. Two maintenance holes 702 are arranged on the sealing cover 7, one of which is arranged on the top plate, and the other is arranged on the side plate.

[0043] Although the utility model is disclosed as above with specific embodiments, these specific embodiments are not used to limit the range of the utility model implementation. Any ordinary skilled person in the art can make some changes / modifications without departing from the scope of the utility model, that is, any equivalent changes / modifications made according to the utility model should be covered by the protection scope of the utility model.

Claims

1. A biomass gasification furnace comprising a furnace body and a feeding device, the feeding device being located above the furnace body, the top of the furnace body being provided with a material dropping port; characterized in that: the feeding device comprises a hopper, a feeding mechanism, an upper sealing cover mechanism and a lower sealing cover mechanism, the hopper comprising a hopper and a feeding pipe; the hopper being wide at the top and narrow at the bottom, the top of the hopper being provided with a material inlet; the upper sealing cover mechanism being arranged at the material inlet; the feeding pipe traverses the left and right sidewalls of the hopper, the bottom end of the feeding pipe being lower than the bottom end of the hopper; the feeding pipe comprising an outer portion in the hopper, the inner portion of the feeding pipe being cut off to form a unified inner cavity with the hopper; the feeding mechanism comprises a shaftless auger, the shaftless auger comprising a spiral blade, the spiral blade being arranged in the feeding pipe, the rear end of the feeding pipe being a motor end and the front end being a material outlet; the driving motor of the shaftless auger being arranged outside the motor end of the feeding pipe; the material dropping port being located below and in front of the material outlet; the lower sealing cover mechanism being arranged at the material outlet.

2. The biomass gasification furnace of claim 1, wherein: the upper sealing cover mechanism comprising an upper sealing cover driven by an upper cylinder and an upper guide rail, the upper guide rail being arranged at the edge of the material inlet.

3. The biomass gasification furnace of claim 2, wherein: the upper sealing cover being a horizontal cover, the upper cylinder being driven horizontally.

4. The biomass gasification furnace of claim 1, wherein: the lower sealing cover mechanism comprising a lower sealing cover driven by a lower cylinder.

5. The biomass gasification furnace of claim 4, wherein: the lower sealing cover being a vertical cover, the lower cylinder being driven horizontally.

6. The biomass gasification furnace of claim 5, wherein: the feeding device further comprising a sealing cover, the feeding pipe extending into the sealing cover, the material outlet being located in the sealing cover, the lower sealing cover being movable in the sealing cover; the bottom of the sealing cover being provided with an opening; the bottom opening of the sealing cover being aligned with and connected to the material dropping port of the furnace body.

7. The biomass gasification furnace of claim 6, wherein: at least one maintenance hole being arranged on the sealing cover.

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