Gasification furnace core capable of improving combustion efficiency

Abstract

This utility model discloses a gasification furnace core that can improve combustion efficiency, including an outer shell and an inner core. The outer shell is made of steel, and the inner core is a sand core, with the inner core concentrically nested inside the outer shell. An air inlet jacket is provided between the inner core and the outer shell, and the air inlet jacket is connected to a return air pipe on the outer wall of the outer shell through an air inlet on the outer shell. The top of the outer shell has an air inlet cylinder connected to the top of the inner core, and several air outlet holes connected to the air inlet jacket are evenly distributed along the circumferential wall of the air inlet cylinder. Several vertical air inlet grooves are formed at equal angles on the inner wall of the inner core, with the bottom of the air inlet grooves extending to the bottom of the inner core. Several air guide rings, perpendicular to the air inlet grooves, are also formed at equal intervals on the inner wall of the inner core. Both the air inlet grooves and the air guide rings have cross-sections that gradually narrow towards the bottom. The design of the air guide rings and air inlet grooves in this utility model allows airflow to pass more smoothly from the bottom of the inner core upwards through the fuel, promoting combustion. The cross-sections of the air guide rings gradually narrow towards the bottom, and the bottom of the air guide rings slopes downwards, making them less prone to clogging.

Description

Technical Field

[0001] This utility model relates to the field of stove technology, and in particular to a gasification furnace core that can improve combustion efficiency. Background Technology

[0002] Compared to traditional furnace cores, gasification furnace cores feature an added air intake structure at the top, allowing oxygen to directly enter above the fuel. During the combustion of coal and wood, volatile combustible substances in the fuel vaporize, and insufficient oxygen leads to black smoke, affecting usability and reducing calorific value. Gasification furnace cores solve this problem. However, current gasification furnace cores only improve the top air intake; increasing the internal air intake could further enhance combustion efficiency. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a gasification furnace core that can improve combustion efficiency, so as to solve the technical problems in the background art mentioned above.

[0004] The technical solution of this utility model is as follows:

[0005] A gasification furnace core for improving combustion efficiency includes an outer shell and an inner core. The outer shell is made of steel, and the inner core is a sand core, with the inner core concentrically nested inside the outer shell. An air inlet jacket is provided between the inner core and the outer shell. The air inlet jacket is connected to a return air pipe on the outer wall of the outer shell via an air inlet on the outer shell. The return air pipe has a fan-shaped cross-section with an open bottom. An air inlet cylinder is located at the top of the outer shell and is connected to the top of the inner core. Several air outlet holes connected to the air inlet jacket are evenly distributed along the circumference of the air inlet cylinder. Several vertical air inlet grooves are evenly distributed on the inner wall of the inner core at equal angles, with the bottom of the air inlet grooves extending to the bottom of the inner core. Several air guide rings are also evenly distributed on the inner wall of the inner core, perpendicular to the air inlet grooves. Both the air inlet grooves and the air guide rings have cross-sections that gradually narrow towards the bottom, with the bottom of the air guide rings sloping downwards.

[0006] Furthermore, the air intake groove has an arc-shaped cross-section, the air guide ring has a V-shaped cross-section, the top of the air guide ring is horizontal, the bottom slopes downward, and the corners are rounded.

[0007] Furthermore, the inner core is shaped like a frustum, with a cylindrical upper part and an air intake slot extending to the connecting position.

[0008] Furthermore, a cover plate with a movable fastening is provided at the top of the outer shell, and a support ring is provided on the inner wall of the outer shell near the top. The cover plate is fastened into the outer shell and supported by the support ring. An air inlet cylinder is welded at the center of the cover plate. A sleeve A is provided at the bottom outer edge of the air inlet cylinder that is fastened to the top of the inner core. The bottom of the outer periphery of the inner core has a section of equal diameter. A positioning step is provided above the section of equal diameter. A steel ring is welded horizontally inward at the bottom position of the positioning step on the bottom of the inner wall of the outer shell. The air inlet is opened along the steel ring. The inner diameter of the steel ring is clearance-fitted with the outer diameter of the section of equal diameter of the inner core.

[0009] Furthermore, a sleeve B that matches the outer diameter of the equal-diameter section is connected to the bottom side of the inner hole of the steel ring, and the equal-diameter section is inserted into the sleeve B.

[0010] The advantages of this utility model are:

[0011] The design of the air guide ring in this invention allows for the circular distribution and connection of airflow. Even if the air intake slot is blocked at a certain height, gas can still be obtained above it through the air guide ring, thus completing the gas delivery from above. This allows the airflow to pass through the fuel more smoothly from the bottom of the inner core, promoting combustion. Both the air intake slot and the air guide ring have cross-sections that gradually narrow towards the bottom, with the bottom of the air guide ring sloping downwards, making it less prone to blockage. Attached Figure Description

[0012] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0013] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0014] Figure 3 This is a schematic diagram of the three-dimensional structure of the inner core;

[0015] Figure 4 This is a three-dimensional sectional view of the outer shell.

[0016] In the diagram: 1-Inner core, 11-Air inlet groove, 12-Air guide ring, 13-Equal diameter section, 14-Positioning step, 2-Outer shell, 21-Support ring, 22-Cover plate, 23-Air inlet cylinder, 24-Air outlet, 25-Sleeve A, 26-Steel ring, 27-Return air pipe, 28-Air inlet. Detailed Implementation

[0017] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0018] like Figure 1-4 As shown:

[0019] A gasification furnace core that can improve combustion efficiency includes an outer shell 2 and an inner core 1. The outer shell 2 is made of steel, and the inner core 1 is a sand core. The inner core 1 is concentrically fitted inside the outer shell 2. There is an air intake jacket between the inner core and the outer shell. The air intake jacket is connected to the return air pipe 27 on the outer wall of the outer shell 2 through an air inlet 28 on the outer shell 2. The return air pipe 27 has a fan-shaped cross-section and an open bottom. The top of the outer shell 2 has an air intake cylinder 23 that is connected to the top of the inner core 1. Several air outlet holes 24 that are connected to the air intake jacket are evenly opened along the periphery of the air intake cylinder 23. Several vertical air intake grooves 11 are opened at equal angles on the inner wall of the inner core 1. The bottom of the air intake grooves 11 extends to the bottom of the inner core 1. Several air guide rings 12 that are perpendicular to the air intake grooves 11 are also opened at equal intervals on the inner wall of the inner core 1. The cross-sections of the air intake grooves 11 and the air guide rings 12 are both structures that gradually narrow from the opening to the bottom. The bottom of the air guide rings 12 is inclined downward.

[0020] This utility model effectively increases the amount of air entering the inner core 1 from the bottom up by setting the air inlet groove 11 on the inner wall of the furnace core. The effect is more significant when using fuels such as block coal and wood, because the larger the volume and the more irregular the fuel, the smoother the air intake of the air inlet groove 11.

[0021] However, for a single air intake slot 11, it is inevitable that it will be blocked by coal ash or other materials in the middle. The setting of the air guide ring 12 allows the airflow to be distributed and connected in a ring. Even if the air intake slot 11 is blocked at a certain height, gas can still be obtained above it through the air guide ring 12, thereby completing the gas delivery above. This allows the airflow to pass through the fuel more smoothly from the bottom of the inner core 1, promoting combustion and making it less prone to blockage.

[0022] The airflow outside the furnace core enters through the air inlet 261 at the bottom of the outer shell 2, passes through the air inlet jacket and enters the air inlet cylinder 23, and then enters above the fuel through the air outlet 24, increasing the oxygen concentration above the fuel, promoting the combustion of the gasified fuel, reducing smoke and dust emissions and increasing the calorific value of combustion.

[0023] As an optimized solution, the cross-section of the air inlet groove 11 is arc-shaped, and the cross-section of the air guide ring 12 is V-shaped. The top of the cross-section of the air guide ring 12 is horizontal, the bottom is inclined downward, and the corner is rounded. This will prevent coal blocks from getting stuck, and the air guide ring 12 will not accumulate ash, making it easier to clean the furnace core.

[0024] The inner core 1 is shaped like a frustum. The frustum-shaped furnace core design helps to match the flame shape that gradually shrinks from bottom to top, thereby improving the flame combustion efficiency. The upper part is cylindrical, and the air inlet slot 11 is opened to the connection position.

[0025] Because inner core 1 is a sand core, it is generally quite easy to damage. Currently, many gasifier cores are integrated, with outer shell 2 and inner core 1 fixed together using refractory cement, making it difficult for customers to replace them separately. To solve this problem, outer shell 2 has been improved as follows:

[0026] A cover plate 22 with a movable fastening is provided at the top of the outer shell 2. A support ring 21 is provided on the inner wall of the outer shell 2 near the top. The cover plate 22 is fastened into the outer shell 2 and supported by the support ring 21. An air inlet cylinder 23 is welded at the center of the cover plate 22. A sleeve A25 is provided at the bottom outer edge of the air inlet cylinder 23 and fastened to the top of the inner core 1. The bottom of the outer periphery of the inner core 1 has a constant diameter section 13. A positioning step 14 is provided above the constant diameter section 13. A steel ring 26 is welded inward horizontally at the bottom position of the inner wall of the outer shell 2 corresponding to the bottom position of the positioning step 14. The inner diameter of the steel ring 26 is clearance-fitted with the outer diameter of the constant diameter section 13 of the inner core 1.

[0027] The furnace core is concentrically positioned and fixed by the sleeve A25 and the steel ring 26. The positioning step 14 cooperates with the steel ring 26 to facilitate the replacement of the inner core 1 along with the outer shell 2. At the same time, the steel ring facilitates the transfer of heat to the outer shell and increases thermal conductivity.

[0028] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A gasification furnace core that can improve combustion efficiency, characterized in that: The device includes an outer shell and an inner core. The outer shell is made of steel, and the inner core is a sand core. The inner core is concentrically fitted inside the outer shell. There is an air intake interlayer between the inner core and the outer shell. The air intake interlayer is connected to the return air pipe on the outer wall of the outer shell through an air inlet on the outer shell. The return air pipe has a fan-shaped cross-section and an opening at the bottom. The top of the outer shell has an air intake cylinder that communicates with the top of the inner core. Several air outlet holes that communicate with the air intake interlayer are evenly opened along the circumference of the air intake cylinder. Several vertical air intake grooves are opened at equal angles on the inner wall of the inner core. The bottom of the air intake grooves extends to the bottom of the inner core. Several air guide rings that intersect the air intake grooves perpendicularly are also opened at equal intervals on the inner wall of the inner core. The cross-sections of the air intake grooves and the air guide rings are structures that gradually narrow from the opening to the bottom. The bottom of the air guide rings is inclined downward.

2. The gasification furnace core with improved combustion efficiency according to claim 1, characterized in that: The air intake groove has an arc-shaped cross-section, and the air guide ring has a V-shaped cross-section. The top of the air guide ring is horizontal, the bottom is inclined downward, and the corners are rounded.

3. The gasification furnace core with improved combustion efficiency according to claim 1, characterized in that: The inner core is shaped like a frustum, with a cylindrical upper part and an air intake slot extending to the connection position.

4. The gasification furnace core with improved combustion efficiency according to claim 3, characterized in that: The top of the outer shell is provided with a cover plate that can be movably fastened. A support ring is provided on the inner wall of the outer shell near the top. The cover plate is fastened into the outer shell and supported by the support ring. An air inlet cylinder is welded at the center of the cover plate. A sleeve A is provided on the bottom outer edge of the air inlet cylinder that fastens to the top of the inner core. The bottom of the outer periphery of the inner core has a section of equal diameter. A positioning step is provided above the section of equal diameter. A steel ring is welded horizontally inward at the bottom position of the bottom of the inner wall of the outer shell corresponding to the bottom position of the positioning step. The inner diameter of the steel ring is clearance-fitted with the outer diameter of the section of equal diameter of the inner core.

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