Fire grate structure of double-airflow double-channel biomass gasifier

Abstract

The utility model provides a fire grate structure of a double-airflow double-channel biomass gasifier, which comprises an inner layer shell and an outer layer shell, a biomass gas channel is arranged in the inner layer shell, an interlayer between the inner layer shell and the outer layer shell is an air channel, the air channel is communicated with a plurality of air exhaust holes, and the air exhaust holes are communicated with the inner layer shell and the outer layer shell. And the biomass gas channel is communicated with the plurality of biomass gas exhaust holes. By means of the structure, biomass gas and air can enter the biomass gasification furnace through the channels, the two kinds of airflow are prevented from being mixed in advance, and operation safety is improved.

Description

TECHNICAL FIELD

[0001] The utility model mainly relates to the technical field of biomass gasification furnace, specifically is a double airflow double pass biomass gasification furnace's fire grate structure. BACKGROUND

[0002] The biomass gasification furnace converts cellulose, hemicellulose and lignin macromolecules in biomass into small molecular biomass combustible gas, small molecular biomass charcoal and small molecular liquid. The main combustible components of the biomass combustible gas are CO, H2 and CH4, and there is a small amount of CnHm (n>1). It can be widely used in various fields of industrial and agricultural production, such as power generation, gas supply and heating (instead of coal combustion).

[0003] In the prior art, the fire grate structure of the biomass gasification furnace is that air and biomass gas are mixed before entering the fire grate and then uniformly distributed through the fire grate. This prior art has certain safety hazards because once a certain temperature is reached, the combustible gas in the biomass gas will mix with oxygen to produce deflagration, thereby affecting the equipment. UTILITY MODEL CONTENTS

[0004] To solve the problems of the prior art, the utility model provides a double airflow double pass biomass gasification furnace's fire grate structure, which can make the biomass gas and air enter the biomass gasification furnace in separate channels, avoid the early mixing of the two air flows, and improve the operation safety.

[0005] The technical scheme of the utility model is as follows:

[0006] A double airflow double pass biomass gasification furnace's fire grate structure, comprising an inner shell and an outer shell, the inner shell is a biomass gas channel, the air channel is between the inner shell and the outer shell, the air channel is communicated with a plurality of air exhaust holes, and the biomass gas channel is communicated with a plurality of biomass gas exhaust holes.

[0007] Further, an air flow pipeline is arranged on the outer shell, one end of the air flow pipeline is located in the air channel, the other end is located outside the outer shell, and the air flow pipeline is provided with the air exhaust hole;

[0008] The outer shell is provided with a biomass gas flow pipeline, one end of the biomass gas flow pipeline penetrates through the air channel and extends into the biomass gas channel, and the other end is located outside the outer shell, and the biomass gas flow pipeline is provided with the biomass gas exhaust hole.

[0009] Further, an air exhaust hole baffle is arranged on the upper part of the air flow pipeline, and a biomass gas exhaust hole baffle is arranged on the upper part of the biomass gas flow pipeline.

[0010] Further, the plurality of air exhaust holes and the plurality of biomass gas exhaust holes are arranged in a staggered manner.

[0011] Further, the outer shell is centrally provided with biomass gas exhaust holes, and three circles of exhaust holes are arranged along the circumference of the outer shell, wherein the first circle on the inner side is uniformly provided with three air exhaust holes, the second circle is uniformly provided with three air exhaust holes and three biomass gas exhaust holes, and the third circle is uniformly provided with four air exhaust holes and eight biomass gas exhaust holes.

[0012] Further, the inner shell and the upper part of the outer shell are both pyramidal structures.

[0013] The beneficial effects of the present application are as follows:

[0014] 1. In the present application, the grate structure allows the biomass gas and air to be discharged separately, so that the biomass gas and air enter the biomass gasifier through separate channels, avoiding premature mixing of the two gas streams and improving operational safety.

[0015] 2. In the present application, the grate structure is simple and reasonable in design, and can prevent the slag in the furnace body from falling and blocking the exhaust holes.

[0016] 3. In the present application, the staggered arrangement of biomass gas exhaust holes and air exhaust holes can make the biomass gas and air distribute uniformly. BRIEF DESCRIPTION OF DRAWINGS

[0017] ATTACHED Figure 1 is a front view of the grate structure.

[0018] ATTACHED Figure 2 is a top view of the grate structure.

[0019] Reference numerals in the drawings:

[0020] 1. outer shell; 2. inner shell; 3. air passage; 4. biomass gas passage; 5. air passage pipe; 6. biomass gas passage pipe; 7. air exhaust hole baffle; 8. biomass gas exhaust hole baffle; 9. air exhaust hole; 10. biomass gas exhaust hole. DETAILED DESCRIPTION

[0021] The present application will be further described in conjunction with the drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present application and not to limit the scope of the present application. In addition, it should be understood that after reading the content taught by the present application, those skilled in the art can make various modifications or modifications to the present application, and these equivalent forms also fall within the scope defined by the present application.

[0022] The present application provides a grate structure of a double-gas-flow double-channel biomass gasifier, which is shown in Figure 1 and Figure 2 .

[0023] The grate structure of the double-gas-flow double-channel biomass gasification furnace in the embodiment mainly comprises an inner layer shell 2 and an outer layer shell 1, both of which are pyramidal structures at the upper part, and a sandwich layer is arranged between the inner layer shell 2 and the outer layer shell 1.

[0024] In the embodiment, the inner layer shell 2 is a biomass gas channel 4 for separately conveying biomass gas, and the sandwich layer between the inner layer shell 2 and the outer layer shell 1 is an air channel 3 for separately conveying air. The air channel 3 is connected to a plurality of air exhaust holes 9 for conveying air into the furnace body through the air exhaust holes 9, and the biomass gas channel 4 is connected to a plurality of biomass gas exhaust holes 10 for conveying biomass gas into the furnace body through the biomass gas exhaust holes 1.

[0025] In a specific structure provided in the embodiment, an air flow pipeline 5 is arranged on the outer layer shell 1, the air flow pipeline 5 can be welded on the outer layer shell 1, one end of the air flow pipeline 5 is located in the air channel 3, and the other end is located outside the outer layer shell 1, so that the air in the air channel 3 can be discharged into the furnace body through the air flow pipeline 5. A biomass gas flow pipeline 6 is also arranged on the outer layer shell 1, the biomass gas flow pipeline 6 can be welded and fixed on the outer layer shell 1 and the inner layer shell 2, one end of the biomass gas flow pipeline 6 penetrates through the air channel 3 and extends into the biomass gas channel 4, and the other end is located outside the outer layer shell 1, so that the biomass gas can be discharged into the furnace body through the inside of the biomass gas flow pipeline 6.

[0026] In the embodiment, air and biomass gas are distributed into the furnace body through the grate structure, and the air and the biomass gas are discharged separately, avoiding the mixture of the two gas flows in advance, and ensuring the safety of the biomass gasification furnace.

[0027] In the embodiment, as shown in Figure 1 An air exhaust hole baffle 7 is arranged on the upper part of each air flow pipeline 5, and a biomass gas exhaust hole baffle 8 is arranged on the upper part of each biomass gas flow pipeline 6, so that the furnace ash and slag can fall into the exhaust hole, avoiding the blockage of the exhaust hole.

[0028] In order to make the air and the biomass gas uniformly pass through the grate and enter the furnace body, in the embodiment, the plurality of air exhaust holes 9 and the plurality of biomass gas exhaust holes 10 are arranged in a staggered manner. Referring to Figure 2 , Figure 2The all of the air exhaust holes represented by the dotted line are air exhaust holes 9, and the solid line is a biomass gas exhaust hole 10. Their specific arrangement is as follows: a biomass gas exhaust hole 10 is arranged at the center of the outer shell 1, and three circles of exhaust holes are arranged along the circumference of the outer shell 1, which are respectively marked as the first circle, the second circle and the third circle from the inside to the outside. The first circle is uniformly arranged with three air exhaust holes 9, the second circle is uniformly arranged with three air exhaust holes 9 and three biomass gas exhaust holes 10, and the three air exhaust holes 9 and the three biomass gas exhaust holes 10 are staggered. The third circle is uniformly arranged with four air exhaust holes 9 and eight biomass gas exhaust holes 10, and the eight biomass exhaust holes 10 are respectively staggered with the four air exhaust holes 9 in two groups. The above structure ensures the uniformity of the distribution of biomass gas and air.

Claims

1. A grate structure of a double-gas-flow double-pass biomass gasifier, characterized in that, The biomass gasification device comprises an inner layer shell and an outer layer shell, the inner layer shell is internally provided with a biomass gas passage, the interlayer between the inner layer shell and the outer layer shell is an air passage, the air passage is communicated with a plurality of air exhaust holes, and the biomass gas passage is communicated with a plurality of biomass gas exhaust holes.

2. The grate structure of the double-gas-flow double-pass biomass gasifier according to claim 1, wherein The outer layer shell is provided with an air flow pipe, one end of the air flow pipe is located in the air passage, and the other end of the air flow pipe is located outside the outer layer shell, and the air flow pipe is internally provided with the air exhaust hole; The outer layer shell is provided with a biomass gas flow pipe, one end of the biomass gas flow pipe penetrates through the air passage and extends into the biomass gas passage, and the other end of the biomass gas flow pipe is located outside the outer layer shell, and the biomass gas flow pipe is internally provided with the biomass gas exhaust hole.

3. The grate structure of the double-gas-flow double-pass biomass gasifier according to claim 2, wherein The air flow pipe is provided with an air exhaust hole baffle at the upper portion of the air flow pipe, and the biomass gas flow pipe is provided with a biomass gas exhaust hole baffle at the upper portion of the biomass gas flow pipe.

4. The grate structure of the twin-current twin-pass biomass gasifier according to claim 1, wherein The plurality of air exhaust holes and the plurality of biomass gas exhaust holes are arranged in a staggered manner.

5. The grate structure of the twin-current twin-pass biomass gasifier according to claim 4, wherein The outer layer shell is provided with a biomass gas exhaust hole at the center of the outer layer shell, and three circles of exhaust holes are arranged along the circumference of the outer layer shell, wherein the first circle at the inner side is uniformly provided with three air exhaust holes, the second circle is uniformly provided with three air exhaust holes and three biomass gas exhaust holes, and the third circle is uniformly provided with four air exhaust holes and eight biomass gas exhaust holes.

6. The grate structure of the twin-current twin-pass biomass gasifier according to claim 1, wherein The upper portions of the inner layer shell and the outer layer shell are both in the shape of a pyramid.

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