Upper furnace structure of downdraft biomass gasification furnace

Abstract

The utility model discloses an upper furnace structure of a downdraft biomass gasification furnace, which comprises a furnace body, an upper furnace is arranged on the furnace body, a cooling groove is arranged in the upper furnace, a plurality of air guide parts which are arranged in a circumferential array are arranged in the cooling groove, notches are arranged on the air guide parts, a frame is arranged in the notches, a shaft rod is arranged in the frame, and the shaft rod is connected with the upper furnace. A plurality of fan blades which are arranged in a linear circumferential column are rotationally arranged on the shaft rod, and the cooling groove is communicated with the upper furnace. According to the upper furnace structure of the downdraft biomass gasification furnace, provided by the utility model, organisms are reacted through the furnace body, the organisms are heated through the upper furnace, the temperature of the upper furnace is reduced through the cooling groove in the upper furnace, and air is guided through the air guide part in the cooling groove; the frame is fixed through the notches in the air guide parts, the shaft rods and the fan blades on the shaft rods are fixed through the frame, and the upper furnace is cooled.

Description

Technical Field

[0001] The utility model relates to the technical field of downdraft biomass gasifiers, in particular to an upper furnace structure of a downdraft biomass gasifier. Background Art

[0002] Downdraft biomass gasifier is an important device for converting biomass into combustible gas. Its upper furnace structure plays a decisive role in gasification efficiency and gas quality. Downdraft gasifiers are usually composed of gas supply system, material inlet and outlet system, gasification reaction zone, temperature control system and other parts. The gasification reaction zone usually includes drying zone, pyrolysis zone, oxidation zone and reduction zone. The temperature of the oxidation zone is about 900~1200℃, which is the key area to generate heat to support other reaction areas. The characteristic of the downdraft gasifier is that the airflow is in the same direction as the material, which helps to increase the degree of tar cracking, thereby reducing the tar content and improving the calorific value and quality of the gas.

[0003] According to the publication (announcement) number: CN205046066U, the publication (announcement) date: 2016-02-24, the disclosed downward suction positive pressure biomass gasifier includes a furnace body, a furnace barrel, an ash unloading device and an air inlet pipe. The furnace body is tightly wrapped around the outside of the furnace barrel, and a feed pipe is arranged on the top of the furnace barrel. The upper part of the furnace barrel is provided with a closed water vapor chamber and a combustible gas chamber in sequence from top to bottom. The water vapor chamber is provided with a water inlet pipe and a water vapor pipe, and the combustible gas chamber is provided with a combustible gas outlet pipe and a gas making manifold. The air inlet pipe extends into the interior of the furnace barrel. An annular groove is respectively arranged at two positions located in the middle and lower middle parts of the furnace barrel on the inner surface of the furnace body to form an annular enclosed space. An exhaust hole connected to the annular enclosed space is arranged on the upper side wall of the furnace barrel, and both annular enclosed spaces are connected to the combustible gas outlet pipe.

[0004] It can be seen from the above-mentioned patents and prior art that the upper furnace structure of the gasification furnace heats the organisms, but the temperature of the upper furnace needs to be controlled. Only by controlling the temperature to a suitable temperature can the gasification reaction be ensured to reach the optimal state in different areas, thereby improving the gasification efficiency and gas quality. Utility Model Content

[0005] The utility model aims to provide an upper furnace structure of a downdraft biomass gasifier, which can control the temperature of the upper furnace and thus improve the gasification efficiency.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: an upper furnace structure of a downdraft biomass gasification furnace, comprising a furnace body, on which an upper furnace is arranged, a cooling groove is provided in the upper furnace, a plurality of air guides arranged in a circular array are provided in the cooling groove, a notch is provided on the air guide, a frame is provided in the notch, an axle is provided in the frame, a plurality of fan blades arranged in a linear circular row are rotatably provided on the axle, and the cooling groove is connected to the upper furnace.

[0007] Preferably, a plurality of baffles arranged in a circular array are provided in the cooling tank, and the air guide portion is located on the side of the baffle.

[0008] Preferably, a heating groove is provided on the furnace body, and the heating groove is connected to the cooling groove.

[0009] Preferably, the heating tank is provided with a plurality of heating wires arranged in a circular array.

[0010] Preferably, a partition cavity is provided on the furnace body.

[0011] In the above technical scheme, the upper furnace structure of a downdraft biomass gasification furnace provided by the utility model has the following beneficial effects: the biomass is reacted through the furnace body, the biomass is heated by the upper furnace, the temperature of the upper furnace is cooled by the cooling trough in the upper furnace, the wind is guided by the air guide part in the cooling trough, the frame is fixed by the notch on the air guide part, the shaft rod and the fan blades on the shaft rod are fixed by the frame, and the upper furnace is cooled. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0013] Figure 1 The overall structural diagram provided for the embodiment of the utility model;

[0014] Figure 2 This is a schematic diagram of the structure inside the mixing box and the feed port provided in an embodiment of the utility model.

[0015] Description of reference numerals:

[0016] 1. furnace body; 100. compartment; 11. upper furnace; 13. cooling trough; 14. baffle; 15. air guide; 16. notch; 17. frame; 18. shaft; 19. fan blade; 20. heating trough; 21. heating wire. DETAILED DESCRIPTION

[0017] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0018] like Figure 1-2 As shown, an upper furnace structure of a downdraft biomass gasifier comprises a furnace body 1, on which an upper furnace 11 is arranged, a cooling groove 13 is provided in the upper furnace 11, a plurality of air guides 15 arranged in a circular array are provided in the cooling groove 13, a notch 16 is provided on the air guide 15, a frame 17 is provided in the notch 16, a shaft 18 is provided in the frame 17, a plurality of fan blades 19 arranged in a linear circular array are rotatably provided on the shaft 18, and the cooling groove 13 is communicated with the upper furnace 11.

[0019] Specifically, when in use, the organism is placed into the upper furnace 11 on the furnace body 1, and then the upper furnace 11 is heated, and then the shaft 18 on the air guide part 15 is opened, and the fan blades 19 are driven to rotate, and then the temperature of the upper furnace 11 is lowered, and the hot air is transmitted to the outside through the air guide part 15 to cool down the upper furnace 11.

[0020] In the above scheme, the reaction organisms are carried out through the furnace body 1, the organisms are heated by the upper furnace 11, the temperature of the upper furnace 11 is cooled by the cooling groove 13 in the upper furnace 11, the wind is guided by the air guide part 15 in the cooling groove 13, the fixing frame 17 is realized by the notch 16 on the air guide part 15, the shaft 18 and the fan blades 19 on the shaft 18 are fixed by the frame 17, and the upper furnace 11 is cooled.

[0021] As an embodiment further provided by the present invention, according to Figure 1 and Figure 2 As shown, a plurality of baffles 14 arranged in a circular array are provided in the cooling tank 13 , and the air guide portion 15 is located on the side of the baffle 14 .

[0022] Specifically, the wind in the wind guide portion 15 will be blocked by the baffle 14 and will not be mixed with the wind in the wind guide portion 15 on other baffles 14 .

[0023] As an embodiment further provided by the present invention, according to Figure 1 and Figure 2 As shown, a heating tank 20 is provided on the furnace body 1 , and the heating tank 20 is connected to the cooling tank 13 .

[0024] Furthermore, the heating groove 20 is provided with a plurality of heating wires 21 arranged in a circular array.

[0025] Specifically, the heating wire 21 is started so that the heating wire 21 increases the temperature of the heating tank 20 and the temperature of the upper furnace 11 is increased.

[0026] As an embodiment further provided by the present invention, according to Figure 1 and Figure 2 As shown, a compartment 100 is provided on the furnace body 1 .

[0027] Specifically, the partition cavity 100 can prevent the temperature from disappearing too quickly and has a heat preservation effect.

[0028] Working principle: put the organism into the upper furnace 11 on the furnace body 1, start the heating wire 21, so that the heating wire 21 increases the temperature of the heating tank 20, heats the upper furnace 11, and then heats the upper furnace 11, and then open the shaft 18 on the air guide part 15, and drive the fan blades 19 to rotate, and then reduce the temperature of the upper furnace 11, and the hot air will be transmitted to the outside through the air guide part 15 to cool down the upper furnace 11.

[0029] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An upper furnace structure of a downdraft biomass gasifier, characterized in that: The invention comprises a furnace body (1) on which an upper furnace (11) is arranged, a cooling groove (13) is provided in the upper furnace (11), a plurality of air guides (15) arranged in a circumferential array are provided in the cooling groove (13), a notch (16) is provided in the air guide (15), a frame (17) is provided in the notch (16), a shaft (18) is provided in the frame (17), a plurality of fan blades (19) arranged in a linear circumferential array are rotatably provided on the shaft (18), and the cooling groove (13) is connected to the upper furnace (11).

2. The upper furnace structure of a downdraft biomass gasifier according to claim 1, characterized in that: A plurality of baffles (14) arranged in a circular array are provided in the cooling groove (13), and the air guide portion (15) is located on the side of the baffle (14).

3. The upper furnace structure of a downdraft biomass gasifier according to claim 2, characterized in that: The furnace body (1) is provided with a heating groove (20), and the heating groove (20) is connected to the cooling groove (13).

4. The upper furnace structure of the downdraft biomass gasifier according to claim 3 is characterized in that: The heating groove (20) is provided with a plurality of heating wires (21) arranged in a circumferential array.

5. The upper furnace structure of the downdraft biomass gasifier according to claim 1, characterized in that: The furnace body (1) is provided with a partition cavity (100).

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