Ceramic burner and reformer

Abstract

The application belongs to hydrogen metallurgy technical field, and discloses a ceramic burner and a converter, the converter comprises the ceramic burner, a throat, a vaulted conversion chamber and a straight cylinder section which are connected in sequence from high to low along the axial direction, and the lower part of the straight cylinder section is provided with a conversion gas outlet, wherein the ceramic burner comprises a shell and a ceramic lining arranged in the shell, the ceramic lining is provided with a gas ring channel connected with a gas introduction pipe and an oxygen ring channel connected with an oxygen introduction pipe, the inner wall surface of the ceramic lining is provided with a gas nozzle layer and an oxygen nozzle layer arranged in upper and lower layers along the axial direction of the burner, and on the horizontal plane perpendicular to the axis, the gas injection angle α1 is greater than the oxygen injection angle α2, so that the oxygen is in the center and the gas wraps the oxygen in the outer ring, after the non-catalytic partial oxidation of the gas in the vaulted conversion chamber and the straight cylinder section, the generated synthesis gas (H2+CO) is discharged from the conversion gas outlet; the introduction of the cyclone can greatly shorten the flame length, so that the gas can be rapidly converted in the limited space.

Description

Technical Field

[0001] This invention belongs to the field of hydrogen metallurgy technology, and relates to a ceramic burner and conversion furnace, mainly used for natural gas, coke oven gas, shale gas and other gases rich in hydrocarbons (C60, 200 ppm). n H m Syngas (H2 and CO) is prepared by non-catalytic partial oxidation of the feed gas. Background Technology

[0002] Natural gas ranks third in global primary energy consumption, accounting for approximately 24%. It is also a high-quality, efficient, and clean chemical feedstock. The H2 and CO in the syngas produced by the non-catalytic partial oxidation of natural gas provide a high-quality reducing gas supplement for vertical shaft furnaces. Additionally, coke oven gas and shale gas, rich in hydrocarbons (C2O3), can also be used. n H m The raw material gas has a wide range of raw material selection.

[0003] Pure oxygen non-catalytic partial oxidation furnaces currently mostly use top-mounted metal burners, which have the following disadvantages: 1. Metal burners have a limited service life and require water cooling; 2. Pure oxygen non-catalytic partial oxidation of natural gas generally uses a very high nozzle velocity to ensure safety and lifespan, resulting in a long flame length, which in turn extends the length of the straight section of the converter. 3. Metal burners have applications in small-scale industrial applications, but large-scale industrial applications present a challenge. Summary of the Invention

[0004] In view of this, the purpose of this invention is to solve the above-mentioned problems and provide a ceramic burner and converter that can meet the requirements of natural gas, coke oven gas, shale gas and other hydrocarbon-rich (C6N) gases. n H m By using raw gas that undergoes non-catalytic partial oxidation in pure oxygen, the service life of the equipment can be extended, and large-scale industrialization can be achieved.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A ceramic burner includes a shell and a ceramic liner disposed within the shell. The ceramic liner has a gas ring channel connected to a gas inlet pipe and an oxygen ring channel connected to an oxygen inlet pipe. The inner wall of the ceramic liner has a gas nozzle layer and an oxygen nozzle layer arranged vertically along the axial direction of the burner. The gas nozzle layer has multiple circumferentially distributed gas nozzles, which are connected to the gas ring channel through a gas distribution channel within the ceramic liner. The oxygen nozzle layer has multiple circumferentially distributed oxygen nozzles, which are connected to the oxygen ring channel through an oxygen distribution channel within the ceramic liner. The gas nozzle layer is located in the upper layer, and the oxygen nozzle layer is located in the lower layer.

[0006] On a horizontal plane perpendicular to the burner axis, the angle between the gas outlet direction and the burner's axis of symmetry on this horizontal plane is α1, and the angle between the oxygen outlet direction and the burner's axis of symmetry on this horizontal plane is α2, with α1 ≥ α2. This ensures that on the same horizontal cross-section, oxygen is always in the center position, with coal gas surrounding oxygen in an outer ring.

[0007] Furthermore, the projections of the gas nozzles and oxygen nozzles on a horizontal plane perpendicular to the burner axis are alternately distributed.

[0008] A converter includes a ceramic burner, a throat, a domed conversion chamber, and a straight section connected sequentially from high to low along an axial direction, as described above. The lower part of the straight section is provided with a conversion gas outlet.

[0009] Furthermore, the ceramic lining in the ceramic burner and the dome conversion chamber are supported on the outer shell by brick supports.

[0010] The beneficial effects of this invention are as follows: 1. In this invention, the ceramic burner of the converter incorporates a swirling structure, which swirls the gas and oxygen into the mixing chamber at different angles on a horizontal plane. The gas envelops the oxygen in the center. After premixing in the mixing chamber, the gas enters the dome-shaped conversion chamber through the throat for rapid conversion. The introduction of the swirling structure results in a shorter flame for both oxygen and gas at the same nozzle velocity and equivalence ratio, significantly reducing the height of the converter.

[0011] 2. The use of ceramic lining directly solves the problem of limited lifespan and the need for water cooling in metal burners. Its lifespan is much longer than that of metal burners, and it does not require a water cooling system, which greatly simplifies the equipment structure and avoids safety risks caused by water leakage.

[0012] 3. Ceramic burners have advantages in large-scale production. Their structural design facilitates scalability and can overcome the material and performance limitations of metal burners in large-scale industrialization, solving the problems of large-scale industrialization and service life of metal burners.

[0013] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0014] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein: Figure 1This is a schematic diagram of the converter.

[0015] Figure 2 This is a schematic diagram of a ceramic burner.

[0016] Figure 3 for Figure 2 Sectional view of AA.

[0017] Figure 4 for Figure 2 BB section view.

[0018] Attached diagram labels: 1. Gas branch pipe; 2. Gas loop; 3. Gas nozzle; 4. Oxygen branch pipe; 5. Oxygen loop; 6. Oxygen nozzle; 7. Throat; 8. Dome conversion chamber; 9. Lower straight section; 10. Converted gas outlet. Detailed Implementation

[0019] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0020] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0021] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0022] Example 1 Please see Figures 2 to 4This is a ceramic burner, comprising a shell and a ceramic liner disposed within the shell. The ceramic liner contains a gas loop 2 connected to a gas branch pipe 1 and an oxygen loop 5 connected to an oxygen branch pipe 4. The gas loop 2 is connected to a gas diversion channel for introducing gas from the gas loop into a mixing chamber, and the oxygen loop 5 is connected to an oxygen diversion channel for introducing oxygen from the oxygen loop into the mixing chamber. The inner wall of the ceramic liner has a gas nozzle layer and an oxygen nozzle layer arranged vertically along the burner's axial direction; in this case, the gas nozzle layer and oxygen nozzle layer are configured as a single layer.

[0023] In the gas nozzle layer of the ceramic burner, the gas in the gas ring channel 2 is introduced into the mixing chamber through the gas nozzle 3 at one end of the gas diversion channel. Multiple gas nozzles 3 are arranged uniformly around the wall of the mixing chamber, and the outlet direction of the gas nozzle 3 is at an angle α1 relative to the central axis on the cross-section of the ceramic burner. Correspondingly, in the oxygen nozzle layer of the ceramic burner, oxygen is introduced into the mixing chamber in the same manner. The outlet direction of the oxygen nozzle 6 is at an angle α2 relative to the central axis on the cross-section of the ceramic burner, where α1 ≥ α2. This angle setting ensures that on the same horizontal cross-section, oxygen is always in the central position, with the gas surrounding the oxygen in an outer ring.

[0024] The projections of the gas nozzle 3 and the oxygen nozzle 6 on a horizontal plane perpendicular to the burner axis are alternately distributed. The gas diversion channel is a straight-hole channel, and its axial direction is the same as the gas outlet direction of the gas nozzle 3. The oxygen diversion channel is also a straight-hole channel, and its axial direction is the same as the gas outlet direction of the oxygen nozzle 6.

[0025] Example 2 like Figure 1 As shown, a conversion furnace includes a ceramic burner, a throat 7, an arched conversion chamber 8, a lower straight section 9, and a conversion gas outlet 10, which are connected sequentially from high to low along the axial direction as in Example 1.

[0026] Pure oxygen and natural gas, coke oven gas, shale gas, and other hydrocarbon-rich sources (C n H m The raw material gas passes through the ceramic burner at a certain equivalence ratio and then enters the dome conversion chamber. After non-catalytic partial oxidation in the dome conversion chamber and the straight section, the resulting synthesis gas (H2+CO) is discharged from the conversion gas outlet to provide high-temperature supplemental reducing gas for the hydrogen-based vertical furnace.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A ceramic burner, comprising a shell and a ceramic liner disposed within the shell, wherein the ceramic liner has a gas loop connected to a gas inlet pipe and an oxygen loop connected to an oxygen inlet pipe, characterized in that: The inner wall of the ceramic liner is provided with a gas nozzle layer and an oxygen nozzle layer arranged in upper and lower layers along the axial direction of the burner. The gas nozzle layer has multiple circumferentially distributed gas nozzles, which are connected to the gas ring channel through the gas distribution channel in the ceramic liner. The oxygen nozzle layer has multiple circumferentially distributed oxygen nozzles, which are connected to the oxygen ring channel through the oxygen distribution channel in the ceramic liner. The gas nozzle layer is located in the upper layer, and the oxygen nozzle layer is located in the lower layer.

2. The ceramic burner according to claim 1, characterized in that: The projections of the gas nozzles and oxygen nozzles on a horizontal plane perpendicular to the burner axis are alternately distributed.

3. The ceramic burner according to claim 1, characterized in that: On a horizontal plane perpendicular to the burner axis, the angle α1 between the axis of the gas diversion channel with one end being a gas nozzle and the burner axis of symmetry on the horizontal plane; the angle α2 between the axis of the oxygen diversion channel with one end being an oxygen nozzle and the burner axis of symmetry on the horizontal plane.

4. The ceramic burner according to claim 3, characterized in that: α1 is greater than or equal to α2.

5. A conversion furnace, characterized in that: It includes a ceramic burner, a throat, a domed conversion chamber, and a straight section, which are connected sequentially from high to low along the axial direction, as described in any one of claims 1 to 4, with a conversion gas outlet at the lower part of the straight section.

6. The converter according to claim 5, characterized in that: The ceramic lining and the domed conversion chamber in the ceramic burner are supported on the outer shell by brick supports.

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