Preheating mechanism of downdraft biomass gasifier

Abstract

The utility model discloses a preheating mechanism of a downdraft biomass gasification furnace, which comprises a furnace body, a placing groove is arranged on the furnace body, a plurality of heating devices arranged in a circumferential array are arranged in the placing groove, a sliding rod is arranged on the furnace body, an extending part is arranged on the sliding rod, a baffle plate is arranged at the other end of the sliding rod, and the baffle plate is arranged on the furnace body. And a notch is formed in the furnace body, and the notch is communicated with the placing groove. The heating device is placed in the placing groove in the furnace body, the furnace body is heated through the heating device, the baffle is controlled to slide in the furnace body through the sliding rod on the furnace body, and when the cover body is placed on the furnace body and abuts against the sliding rod through the extending part on the sliding rod to control the sliding rod 17 to pass through in a sliding mode, the cover body can slide in the furnace body. The baffle is driven to shield the notch, air leakage is avoided, and the temperature in the furnace body is kept sealed.

Description

Technical Field

[0001] The utility model relates to the technical field of downdraft biomass gasifiers, in particular to a preheating mechanism of a downdraft biomass gasifier. Background Art

[0002] Downdraft biomass gasifier is an effective biomass energy conversion equipment. It uses a specific preheating mechanism to increase the temperature during the gasification process, thereby improving the quality and thermal efficiency of the combustible gas. The design of the preheating mechanism is crucial to the overall performance of the gasifier. The role of the preheating mechanism is to preheat the gasification medium so that the gasification medium reaches a certain temperature before entering the gasifier, so that there is a higher initial temperature at the beginning of the gasification reaction. Such preheating treatment helps to speed up the reaction rate, improve gasification efficiency, reduce the tar content, and increase the calorific value of the combustible gas finally produced.

[0003] According to the publication (announcement) number: CN202148289U, the publication (announcement) date: 2012-02-22, a downdraft biomass fuel gasifier is disclosed, including a gasifier body having a furnace and a grate at the bottom of the furnace, an air outlet cavity is formed between the inner wall of the gasifier body and the outer wall of the furnace, and the furnace is formed with a drying zone, a cracking zone, an oxidation zone and a reduction zone from top to bottom; an air outlet pipe, an air entrainment mechanism and a carbon monoxide gas filtering mechanism that filters and guides carbon monoxide gas to a burner for combustion, one end of the air outlet pipe is connected to the gasifier body and communicates with the air outlet cavity, the other end of the air outlet pipe is connected to the air entrainment mechanism, and the air entrainment mechanism is connected to the carbon monoxide gas filtering mechanism pipeline.

[0004] It is known from the above patents and prior art that the preheating mechanism is preheated before the equipment is used, and then the reaction is carried out. However, after the reaction of the vaporization furnace is completed, the waste needs to be taken out. When taking it out, the gas in the furnace will dissipate, and then the preheating mechanism needs to be restarted for preheating. However, there is still residual temperature in the furnace, and starting the preheating mechanism is relatively wasteful. Utility Model Content

[0005] The utility model aims to provide a preheating mechanism for a downdraft biomass gasifier, which can maintain the temperature inside the furnace body when taking materials.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a preheating mechanism of a downdraft biomass gasifier, comprising a furnace body, a placement groove is provided on the furnace body, a plurality of heating devices arranged in a circular array are arranged in the placement groove, a sliding rod is provided on the furnace body, an extension portion is provided on the sliding rod, a baffle is provided at the other end of the sliding rod, a notch is provided on the furnace body, and the notch is communicated with the placement groove.

[0007] Preferably, a plurality of fixing blocks arranged in a circular array are provided on the furnace body, and elastic members are provided on the fixing blocks.

[0008] Preferably, a top plate is provided on the sliding rod, and the other end of the elastic member is provided on the top plate.

[0009] Preferably, a cover ring is provided on the furnace body, and the extension portion slides on the cover ring.

[0010] Preferably, a cover is provided on the furnace body, and when the cover is buckled on the furnace body, it pushes against the extension portion.

[0011] Preferably, a connecting pipe is provided on the furnace body, and an air intake mechanism is provided on the connecting pipe.

[0012] Preferably, the elastic member is a spring.

[0013] In the above technical scheme, the preheating mechanism of a downdraft biomass gasifier provided by the utility model has the following beneficial effects: a heating device is placed through a placement groove in the furnace body, and the furnace body is heated by the heating device. The sliding rod on the furnace body is used to control the sliding of the baffle in the furnace body, and the extension part on the slide rod is used to realize that when the cover body is placed on the furnace body, a push is performed to control the sliding passage of the slide rod 17, thereby driving the baffle to cover the notch to avoid air leakage and keep the temperature in the furnace body sealed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] 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.

[0015] Figure 1 The overall structural diagram provided for the embodiment of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure inside the furnace body provided by an embodiment of the utility model.

[0017] Description of reference numerals:

[0018] 1. furnace body; 11. cover body; 12. connecting pipe; 13. placement groove; 14. heating device; 15. cover ring; 16. extension part; 17. slide rod; 18. top plate; 19. elastic member; 20. fixing block; 21. notch; 22. baffle. DETAILED DESCRIPTION

[0019] 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.

[0020] like Figure 1-2 As shown, a preheating mechanism of a downdraft biomass gasifier comprises a furnace body 1, a placement groove 13 is provided on the furnace body 1, a plurality of heating devices 14 arranged in a circular array are arranged in the placement groove 13, a slide bar 17 is provided on the furnace body 1, an extension portion 16 is provided on the slide bar 17, a baffle 22 is provided at the other end of the slide bar 17, a notch 21 is provided on the furnace body 1, and the notch 21 is communicated with the placement groove 13.

[0021] Specifically, when in use, the furnace body 1 is first heated and preheated. After the preheating is completed, the reaction material is placed in the furnace body 1, and then the cover body 11 is covered on the furnace body 1. The cover body 11 then pushes against the multiple extensions 16 set on the furnace body 1, and then the multiple extensions 16 are moved downward, so that the slide bar 17 slides in the furnace body 1 and drives the baffle 22 at the other end of the slide bar 17, so that the baffle 22 is blocked in the slot 21, so that the connection between the placement slot 13 and the furnace body 1 is closed. After the reaction is completed, the cover body 11 is opened, and the extension part 16 moves upward. At this time, the furnace body 1 and the placement slot 13 are connected. At this time, the heat in the placement slot 13 enters the furnace body 1 through the slot 21 to keep the furnace body 1 warm.

[0022] In the above scheme, the heating device 14 is placed through the placement groove 13 in the furnace body 1, and the furnace body 1 is heated by the heating device 14. The sliding bar 17 on the furnace body 1 is used to control the sliding of the baffle 22 in the furnace body 1. When the cover body 11 is placed on the furnace body 1, the extension part 16 on the slide bar 17 is used to push and control the sliding of the slide bar 17, so as to drive the baffle 22 to cover the notch 21 to avoid air leakage, thereby keeping the temperature in the furnace body 1 sealed.

[0023] As an embodiment further provided by the present invention, according to Figure 1 and Figure 2 As shown, a plurality of fixing blocks 20 arranged in a circumferential array are provided on the furnace body 1 , and elastic members 19 are provided on the fixing blocks 20 .

[0024] Furthermore, a top plate 18 is disposed on the slide bar 17 , and the other end of the elastic member 19 is disposed on the top plate 18 .

[0025] Furthermore, a cover ring 15 is provided on the furnace body 1 , and the extension portion 16 slides on the cover ring 15 .

[0026] Furthermore, a cover 11 is disposed on the furnace body 1 , and when the cover 11 is buckled on the furnace body 1 , it pushes against the extension portion 16 .

[0027] Specifically, when the cover 11 is buckled into the furnace body 1, the elastic member 19 exerts force. When the cover 11 is removed, the elastic member 19 releases force, drives the baffle 22, and moves upward.

[0028] As an embodiment further provided by the present invention, according to Figure 1 and Figure 2 As shown, a connecting pipe 12 is provided on the furnace body 1 , and an air intake mechanism is provided on the connecting pipe 12 .

[0029] Specifically, the gas is filled into the connecting pipe 12 through the air intake mechanism.

[0030] Working principle: When in use, first heat the furnace body 1 for preheating. After the preheating is completed, place the reaction material in the furnace body 1, and then cover the furnace body 1 with the cover body 11. Then the cover body 11 pushes against the multiple extensions 16 set on the furnace body 1, and then the multiple extensions 16 are moved downward to make the slide bar 17 slide in the furnace body 1 and drive the baffle 22 at the other end of the slide bar 17 so that the baffle 22 is blocked in the slot 21 to close the connection between the placement slot 13 and the furnace body 1. After the reaction is completed, open the cover body 11. At this time, the extension 16 moves upward, and the furnace body 1 and the placement slot 13 are connected. At this time, the heat in the placement slot 13 enters the furnace body 1 through the slot 21 to keep the furnace body 1 warm.

[0031] 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. A preheating mechanism for a downdraft biomass gasifier, characterized in that: The invention comprises a furnace body (1), wherein a placement groove (13) is provided on the furnace body (1), a plurality of heating devices (14) arranged in a circular array are arranged in the placement groove (13), a sliding rod (17) is provided on the furnace body (1), an extension portion (16) is provided on the sliding rod (17), a baffle (22) is provided at the other end of the sliding rod (17), and a notch (21) is provided on the furnace body (1), wherein the notch (21) and the placement groove (13) are connected.

2. The preheating mechanism of a downdraft biomass gasifier according to claim 1, characterized in that: The furnace body (1) is provided with a plurality of fixing blocks (20) arranged in a circumferential array, and the fixing blocks (20) are provided with elastic members (19).

3. The preheating mechanism of a downdraft biomass gasifier according to claim 2, characterized in that: A top plate (18) is arranged on the sliding rod (17), and the other end of the elastic member (19) is arranged on the top plate (18).

4. The preheating mechanism of a downdraft biomass gasifier according to claim 1, characterized in that: The furnace body (1) is provided with a cover ring (15), and the extension portion (16) slides on the cover ring (15).

5. The preheating mechanism of a downdraft biomass gasifier according to claim 4, characterized in that: The furnace body (1) is provided with a cover body (11), and when the cover body (11) is buckled onto the furnace body (1), it pushes against the extension portion (16).

6. The preheating mechanism of a downdraft biomass gasifier according to claim 1, characterized in that: The furnace body (1) is provided with a connecting pipe (12), and the connecting pipe (12) is provided with an air intake mechanism.

7. The preheating mechanism of a downdraft biomass gasifier according to claim 2, characterized in that: The elastic member (19) is a spring.

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