Uniform air supplement structure of gasification furnace

Abstract

The uniform air supplementing structure comprises a furnace body, an air belt and a draught fan, air holes are evenly formed in the furnace wall of the furnace body in the circumferential direction and correspond to an oxide layer area in the furnace body, the air belt is arranged on the outer side of the furnace body, a closed annular cavity is formed by the air belt and the furnace wall, and the air holes are covered with the air belt. And fans are oppositely arranged on the outer sides of the wind belts, and air inlets of the fans are connected with the annular cavity. Therefore, air is fed into the annular cavity by the fan, is preheated by the furnace body in the annular cavity, and then enters an oxidation layer area through the air holes uniformly distributed around the furnace body, so that a gasifying agent is uniformly distributed in the hearth, the reaction of the oxidation layer is sufficient and uniform, and the gasification performance of the gasification furnace is improved; and the stability and efficiency of the gasification process are ensured.

Description

Technical Field

[0001] This application relates to the field of gasifier ventilation technology, specifically to a uniform air supply structure for a gasifier. Background Technology

[0002] Fixed-bed gasifiers, as a common type of gasification equipment, are affected by various factors in terms of operating efficiency and heat load. Among these, the type and dosage of the gasifying agent, as well as the method of air supply, are particularly critical. The location and method of air supply directly affect the sufficiency and uniformity of the feedstock oxidation layer reaction, thereby determining the gasification efficiency and heat load of the gasifier.

[0003] However, the arrangement of the air inlets has a significant impact on the supply of gasifying agent and its distribution within the furnace. The gasifying agent in a fixed-bed gasifier is typically air. If the air is not distributed uniformly within the furnace, the gasification rate at different locations on the same cross-section will be inconsistent, resulting in incomplete oxidation of the oxide layer and further exacerbating the unevenness of the reaction within the gasifier.

[0004] Currently, fixed-bed gasifiers are mainly classified into three types based on the location of the make-up air: top-suction, bottom-suction, and open-hearth. While these traditional make-up air methods meet the operational requirements of gasifiers to a certain extent, they still have some shortcomings. For example, different make-up air locations and methods can lead to uneven reactions within the gasifier, resulting in problems such as large temperature differences, gasifier instability, low gasification efficiency, and excessive ash and slag. Therefore, existing fixed-bed gasifiers have significant limitations in make-up air arrangement, which restricts further improvements in gasifier performance. Utility Model Content

[0005] Therefore, this application provides a uniform air supply structure for a gasifier to solve the technical problem of low gasification efficiency caused by uneven distribution of gasifying agent in the furnace in the prior art.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] A uniform air supply structure for a gasifier is characterized in that the uniform air supply structure includes: a furnace body, an air duct, and a blower. The furnace body has air holes uniformly arranged along the circumferential direction on its furnace wall, and the air holes are arranged corresponding to the oxide layer area inside the furnace body. The air duct is arranged on the outside of the furnace body and forms a closed annular cavity with the furnace wall. The air holes are covered by the air duct. A blower is arranged on the outside of the air duct, and the air inlet of the blower is connected to the annular cavity.

[0008] Optionally, a filter screen is provided on the air vent.

[0009] Optionally, on the same cross section perpendicular to the axis of the furnace wall and the furnace body, the number of air holes is odd.

[0010] Alternatively, the furnace body is provided with at least two layers of air holes along the axial direction, with the air holes in adjacent layers being staggered.

[0011] Alternatively, the air inlet of the fan is connected to the annular cavity by a connecting pipe, and the end of the connecting pipe connected to the annular cavity is offset from the air hole.

[0012] Further optionally, the uniform air supply structure includes a wind speed sensor, which is disposed on the connecting pipe.

[0013] Alternatively, the air vent may be circular in shape.

[0014] Optionally, at least two fans are provided, and the fans are evenly distributed along the air belt.

[0015] Compared with the prior art, this application has at least the following beneficial effects:

[0016] A uniform air supply structure for a gasifier includes a furnace body, an air duct, and a blower. Air holes are uniformly arranged along the circumference of the furnace wall, corresponding to the oxide layer region within the furnace body. The air duct is located on the outer side of the furnace body, forming a closed annular cavity with the furnace wall. The air holes are covered by the air duct. A blower is positioned opposite the outer side of the air duct, and the blower's inlet is connected to the annular cavity. Air is thus supplied to the annular cavity by the blower, preheated by the furnace body within the cavity, and then enters the oxide layer region through the uniformly distributed air holes around the furnace body. This achieves uniform distribution of the gasifying agent within the furnace, ensuring a thorough and uniform reaction in the oxide layer, thereby improving the gasification performance of the gasifier and ensuring the stability and efficiency of the gasification process. Attached Figure Description

[0017] To more intuitively illustrate the prior art and this application, exemplary drawings are provided below. It should be understood that the specific shapes and structures shown in the drawings should not generally be regarded as limiting conditions for implementing this application; for example, based on the technical concept disclosed in this application and the exemplary drawings, those skilled in the art are able to easily make conventional adjustments or further optimizations to the addition / reduction / classification, specific shapes, positional relationships, connection methods, size ratios, etc. of certain units (components).

[0018] Figure 1 A schematic diagram of a uniform air supply structure for a gasifier provided in an embodiment of this application;

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Furnace body; 2. Air duct; 3. Air vents; 4. Grate; 5. Filter screen; 6. Fan; 7. Wind speed sensor. Detailed Implementation

[0021] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] The purpose of this invention is to provide a uniform air supply structure for a gasifier, with the main objective being to achieve uniform distribution of the gasifying agent within the furnace, ensuring a full and uniform reaction of the oxide layer, and further improving the gasification performance of the gasifier.

[0023] refer to Figure 1 As shown, a uniform air supply structure for a gasifier is provided, including a furnace body 1, an air duct 2, and a blower 6. Air holes 3 are uniformly arranged along the circumference of the furnace wall of the furnace body 1, corresponding to the oxide layer area within the furnace body 1. The oxide layer area is located above the grate 4, allowing air to directly enter the oxide layer through the air holes 3. The air duct 2 is located on the outside of the furnace body 1, forming a closed annular cavity with the furnace wall. The air holes 3 are covered by the air duct 2, meaning the air duct 2 is located outside the oxide layer area of ​​the furnace body 1, above the grate 4. The air entering the annular cavity can be preheated by the furnace body 1. The air duct 2 is made of cast iron and can be welded to the furnace wall. The height of the air duct 2 depends on the size of the furnace body 1. A blower 6 is located on the outside of the air duct 2, with its inlet connected to the annular cavity. To ensure uniform airflow into the air holes 3 within the annular cavity, multiple blowers 6 can be installed and evenly distributed around the air duct 2; preferably, two blowers 6 are used.

[0024] In this way, air is sent into the annular cavity by the blower 6. The air is preheated in the annular cavity by the furnace body 1, and then enters the oxide layer area through the air holes 3 evenly distributed around the furnace body 1. Air is supplied into the furnace body 1 from different directions, thereby achieving uniform distribution of the gasifying agent in the furnace, increasing the oxygen supply, and making the reaction of the oxide layer sufficient and uniform, thereby improving the gasification performance of the gasifier and ensuring the stability and efficiency of the gasification process.

[0025] In a preferred embodiment, a filter screen 5 is provided on the air vent 3, covering the air vent 3. For example, the size of the filter screen 5 matches the size of the air vent 3, and it can be directly installed in each air vent 3. Alternatively, a large mesh sheet can be used as the filter screen 5, and the large mesh sheet is attached in a ring to the inner or outer side of the furnace wall where the air vent 3 is located. That is, the large mesh sheet covers the inner or outer side of the furnace wall area of ​​the annular cavity, thereby covering the air vent 3. In this way, the filter screen 5 effectively prevents material fragments, debris, and ash from entering the air duct 2, avoiding frequent cleaning of the air duct 2.

[0026] In a preferred embodiment, a ring of air holes 3 is arranged around the furnace wall on the same cross section perpendicular to the axis of the furnace body 1. The number of air holes 3 is odd, thereby preventing the air entering from the air holes 3 from forming convection.

[0027] In a preferred embodiment, the furnace body 1 is provided with at least two layers of air holes 3 along the axial direction, and the air holes 3 of adjacent layers are staggered, so as to further ensure that the air entering the oxide layer is evenly replenished.

[0028] In a preferred embodiment, the air inlet of the fan 6 is connected to the annular cavity by a connecting pipe, and the end of the connecting pipe connected to the annular cavity is offset from the air hole 3, thereby further ensuring that the air entering the oxide layer is evenly replenished.

[0029] Preferably, a wind speed sensor 7 is installed on the connecting pipe. The wind speed and air volume measured by the wind speed sensor 7 can be directly fed back to the operator, who can then control the air volume of the blower 6 based on the feedback.

[0030] Preferably, the air vent 3 is circular in shape. The size and number of air vents 3 need to be determined based on the actual air supply volume and wind speed.

[0031] The working principle is as follows: Air is supplied by the blower 6 through the connecting pipe into the air duct 2. The air is preheated by the heat transferred from the furnace body 1 within the annular cavity, and then enters the furnace body 1 from different directions through the air holes 3 on the furnace body 1 to supplement the reaction of the oxidation layer in the gasifier. During this process, feedback from the wind speed sensor 7 provides operators with adjustment guidelines, ensuring that the oxygen content of the air entering the furnace body 1 through the air holes 3 meets the reaction requirements of the oxidation layer in the gasifier. Simultaneously, the filter screen 5 on the circular air holes 3 effectively prevents material fragments, debris, and ash from entering the air duct 2, avoiding frequent cleaning of the air duct 2.

[0032] The technical features of the above embodiments can be combined in any way (as long as there is no contradiction in the combination of these technical features). For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described; these embodiments not explicitly written should also be considered to be within the scope of this specification.

Claims

1. A uniform air supply structure for a gasifier, characterized in that, The uniform air supply structure includes: a furnace body (1), an air belt (2), and a blower (6). The furnace body (1) has air holes (3) uniformly arranged along the circumferential direction on the furnace wall. The air holes (3) are arranged corresponding to the oxide layer area inside the furnace body (1). The air belt (2) is arranged on the outside of the furnace body (1) and forms a closed annular cavity with the furnace wall. The air holes (3) are covered by the air belt (2). The blower (6) is arranged on the outside of the air belt (2). The air inlet of the blower (6) is connected to the annular cavity.

2. The uniform air supply structure of a gasifier according to claim 1, characterized in that, A filter screen (5) is provided on the air hole (3).

3. The uniform air supply structure for a gasifier according to claim 1, characterized in that, On the same cross section perpendicular to the axis of the furnace wall and the furnace body (1), the number of air holes (3) is odd.

4. The uniform air supply structure of a gasifier according to claim 3, characterized in that, The furnace body (1) has at least two layers of air holes (3) along the axial direction, and the air holes (3) of adjacent layers are staggered.

5. The uniform air supply structure of a gasifier according to claim 4, characterized in that, The air inlet of the fan (6) is connected to the annular cavity by a connecting pipe, and the end of the connecting pipe connected to the annular cavity is offset from the air hole (3).

6. The uniform air supply structure of a gasifier according to claim 5, characterized in that, The uniform air supply structure includes a wind speed sensor (7), which is mounted on the connecting pipe.

7. The uniform air supply structure of a gasifier according to claim 6, characterized in that, The air vent (3) is circular in shape.

8. The uniform air supply structure of a gasifier according to claim 1, characterized in that, At least two fans (6) are provided, and the fans (6) are evenly arranged along the air belt (2).

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