A sulfur recovery burner

Abstract

The present invention provides a sulfur recovery burner, comprising: a combustion chamber body, a fuel gas passage for supplying fuel gas to the combustion chamber body, a combustion-supporting air passage for supplying combustion-supporting air to the combustion chamber body, an oxygen passage for supplying oxygen to the combustion chamber body, and an acid gas passage for supplying acid gas to the combustion chamber body; a swirl vane is provided at the outlet of the acid gas passage, and after the acid gas passes through the swirl vane and is mixed with the combustion-supporting air, fuel gas, oxygen, and combustion-supporting air, it enters the combustion chamber body for combustion. In practical applications, by providing the swirl vane, the flow field of the acid gas guided by the acid gas passage can be changed. Under the action of the vortex flow field, the acid gas is vortex-mixed with the fuel gas, oxygen, and combustion-supporting air for combustion, improving the mixing uniformity, and further improving the combustion efficiency in the combustion chamber body, that is, the combustion conversion rate of the acid gas.

Description

Technical Field

[0001] The present invention relates to the technical field of sulfur recovery devices, and particularly to a sulfur recovery burner. Background Art

[0002] In the sulfur recovery and sulfuric acid production process, generally, acidic gas containing sulfur substances such as hydrogen sulfide and carbon disulfide is subjected to high-temperature incineration to oxidize the sulfur contained in the acid gas into sulfur dioxide, and then further oxidized into sulfur trioxide in subsequent processes to produce finished sulfuric acid, thereby realizing the recovery of sulfur in the waste gas. In this process, if the designed pressure of the acid gas is relatively low, a common method is to design several branch pipes on the burner and directly connect them to the corresponding branch pipes on the incinerator. The acid gas is introduced through the inlet on the burner and sprayed into the furnace through the branch pipes on the high-temperature incinerator for combustion. The disadvantage of this method is that the acid gas injection position is at the front of the incinerator, in the same direction as the flue gas flow, resulting in incomplete mixing of the acid gas and the combustion-supporting air and insufficient combustion. Summary of the Invention

[0003] In order to solve the technical problem in the prior art that the acid gas and the combustion-supporting air are not completely mixed and the combustion is insufficient, the embodiments of the present invention provide a sulfur recovery burner, and the specific technical solution is as follows:

[0004] The embodiments of the present invention provide a sulfur recovery burner, including: a combustion chamber body, a fuel gas channel for providing fuel gas for the combustion chamber body, a combustion-supporting air channel for providing combustion-supporting air for the combustion chamber body, an oxygen channel for providing oxygen for the combustion chamber body, and an acidic gas channel for providing acidic gas for the combustion chamber body;

[0005] A swirler is provided at the outlet of the acidic gas channel, and after the acidic gas is mixed with the combustion-supporting air, the fuel gas, the oxygen, and the combustion-supporting air through the swirler, it enters the combustion chamber body for combustion.

[0006] Optionally, the throat of the combustion chamber body is a contracted cone.

[0007] Optionally, the combustion chamber body includes: a shell arranged on the outermost layer, a heat insulation cotton arranged on the inner side wall of the shell, a heat preservation refractory brick arranged on the inner side wall of the heat insulation cotton, a used refractory brick arranged on the inner side wall of the heat preservation refractory brick, a castable injected at the throat, and an adiabatic filter paper laid on the outer side wall of the throat.

[0008] Optionally, a housing adapted to the size of the throat is arranged on the outer side wall of the throat, and the material of the housing is stainless steel.

[0009] Optionally, the oxygen channel is disposed at the axial position of the combustion chamber body. The end of the first exhaust port of the oxygen channel is closed, and a first inclined hole is formed at the end of the first exhaust port. The included angle between the axis of the first inclined hole and the axis of the oxygen channel is greater than 0°;

[0010] The fuel gas channel is disposed outside the oxygen channel; the end of the second exhaust port of the fuel gas channel is closed with the side wall of the oxygen channel, and a second inclined hole is formed at the end of the second exhaust port. The included angle between the axis of the second inclined hole and the axis of the oxygen channel is greater than 0°, and the axis of the second inclined hole is not parallel to the axis of the first inclined hole;

[0011] The extension line of the axis of the first inclined hole towards the outside of the oxygen channel is the first extension line; the extension line of the second inclined hole towards the outside of the fuel gas channel is the second extension line, and the first extension line intersects with the second extension line;

[0012] The combustion-supporting air channel is disposed outside the fuel gas channel.

[0013] Optionally, the ends of the third exhaust ports of the combustion-supporting air channels communicate with each other.

[0014] Optionally, a plurality of fire-viewing hole channels and a plurality of igniter channels are provided on the side wall of the combustion chamber cup; an igniter is disposed in the igniter channel.

[0015] Optionally, the combustion-supporting air channel and the fuel gas channel are connected by a flange.

[0016] Optionally, the swirl vane is connected to the combustion-supporting air channel by a flange.

[0017] Optionally, the oxygen channel and the fuel gas channel are of an integral structure.

[0018] An embodiment of the present invention provides a sulfur recovery burner, including: a combustion chamber body, a fuel gas channel for providing fuel gas for the combustion chamber body, a combustion-supporting air channel for providing combustion-supporting air for the combustion chamber body, an oxygen channel for providing oxygen for the combustion chamber body, and an acid gas channel for providing acid gas for the combustion chamber body; a swirl vane is disposed at the outlet of the acid gas channel, and after the acid gas is mixed with the combustion-supporting air, the fuel gas, the oxygen, and the combustion-supporting air via the swirl vane, it enters the combustion chamber body for combustion.

[0019] In practical applications, by setting the swirl vanes, the flow field of the acid gas guided through the acid gas channel can be changed. Under the action of the vortex flow field, the acid gas is vortex-mixed with the fuel gas, oxygen for combustion, and combustion-supporting air for combustion support, improving the mixing uniformity, and further improving the combustion efficiency in the combustion chamber body, that is, the combustion conversion rate of the acid gas. By using the sulfur recovery burner provided by the present invention, the mixing uniformity of the acid gas, dye gas, oxygen, and combustion-supporting air flowing into the combustion chamber body is improved, enabling the above-mentioned mixed gas to burn sufficiently and increasing the combustion conversion rate of the acid gas. Brief Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art.

[0021] Figure 1 It is a schematic structural diagram of a sulfur recovery burner provided by an embodiment of the present invention.

[0022] Figure 2 It is a schematic structural diagram of a swirl vane provided by an embodiment of the present invention.

[0023] Figure 3 It is a schematic structural diagram of a combustion chamber body provided by an embodiment of the present invention.

[0024] Figure 4 It is a schematic structural diagram of a combined structure of a fuel gas channel and an oxygen channel provided by an embodiment of the present invention.

[0025] Figure 5 It is a schematic structural diagram of a combustion-supporting air channel provided by an embodiment of the present invention.

[0026] Figure 6 It is a schematic diagram of the gas flow direction provided by an embodiment of the present invention.

[0027] Reference Signs:

[0028] 1 Combustion Chamber Body, 2 Fuel Gas Channel, 3 Combustion-Supporting Air Channel, 4 Oxygen Channel, 5 Acid Gas Channel, 6 Swirl Vane, 7 Throat. The combustion chamber body includes: 8 Shell, 9 Heat Insulating Cotton, 10 Heat Preserving Refractory Brick, 11 Old Refractory Brick, 12 Castable, 13 Heat Insulating Filter Paper, 14 Igniter Channel, 15 First Exhaust Port, 16 First Oblique Hole, 17 Second Exhaust Port, 18 Second Oblique Hole, 19 Third Exhaust Port, 20 Viewing Hole Channel. Detailed Embodiments

[0029] The following will describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

[0030] Embodiment 1

[0031] Please refer to Figures 1-6 , an embodiment of the present invention provides a sulfur recovery burner, including: a combustion chamber body 1, a fuel gas channel 2 for providing fuel gas for the combustion chamber body 1, a combustion-supporting air channel 3 for providing combustion-supporting air for the combustion chamber body 1, an oxygen channel 4 for providing oxygen for the combustion chamber body 1, and an acid gas channel 5 for providing acid gas for the combustion chamber body 1; a swirl vane 6 is arranged at the outlet of the acid gas channel 5, and after the acid gas is mixed with the combustion-supporting air, the fuel gas, the oxygen, and the combustion-supporting air through the swirl vane 6, it enters the combustion chamber body 1 for combustion.

[0032] It should be noted that the above combustion chamber body 1 can be an existing combustion chamber. For example, the combustion chamber in the invention patent with the application number 201610425745.1 and the name of a low-pressure acid gas integrated burner for sulfur recovery and acid production process can be directly applied to this embodiment to achieve the function of providing a combustion place for the mixed gas of the above fuel gas, acid gas, combustion-supporting air, and oxygen. The above combustion chamber body 1 can also be a combustion chamber body with a refractory lining.

[0033] Specifically, the above fuel gas channel 2 and the above oxygen channel 4 can be an integral structure, and the two together form a fuel gas lance. The above fuel gas lance is inserted into the combustion-supporting air channel 3 and is connected to the above combustion-supporting air channel 3 through a flange and a cover plate. When the combustion-supporting air is transmitted to the throat 7 of the combustion chamber body 1 through the gap between the combustion-supporting air channel 3 and the above fuel gas lance, the above combustion-supporting air can be transmitted into the combustion-supporting air channel 3 through a distribution chamber and, through a reciprocating vane arranged at the outlet of the combustion-supporting air combustion-supporting air channel 3, make the combustion-supporting air introduced into the combustion chamber body 1 through the combustion-supporting air channel 3 have rotational power and be discharged from the above combustion-supporting air channel 3 through an air nose; the above reciprocating vane can be directly purchased. Of course, the above combustion-supporting air can also be directly output to the outlet of the combustion-supporting air channel 3. At the exhaust port of the above fuel gas lance, oxygen and fuel gas can be discharged linearly. A flame stabilizer can be arranged on the central gun head of the above dye lance, and the above flame stabilizer is used to stabilize the central flame. Before entering the above acid gas channel 5, a ball valve for appropriately adjusting the opening according to the acid gas volume can be arranged.

[0034] Specifically, the above-mentioned swirl vane 6 is arranged at the exhaust port of the acidic gas passage 5 and is used to generate a swirling flow field for the acidic gas passing through the swirl vane 6. Driven by the swirling flow field, the acidic gas is fully mixed with the combustion-supporting air, oxygen, and fuel gas. After mixing, the mixture enters the combustion chamber body 1 for combustion. During the combustion process, the above-mentioned mixed gas burns sufficiently, improving the combustion conversion rate of the acidic gas. It should be noted that the optimal specification parameters of the above-mentioned swirl vane 6 can be obtained through experiments. For example, combustion-supporting air is added to the combustion-supporting air passage 3, and a gas with a mass fraction similar to that of the acidic gas is added to the acidic gas passage 5 for experiments to ensure the safety of the above-mentioned experimental process. Under the conditions of keeping the flow rate of the above-mentioned acidic gas unchanged and the flow rate of the above-mentioned combustion-supporting air unchanged, swirl vanes 6 of different specifications are set, and the mixing uniformity of the mixed gas after the swirling action of the above-mentioned swirl vane 6 is statistically analyzed. Then, the specification parameters of the swirl vane 6 when the mixing uniformity is the best can be obtained. Just set the swirl vane 6 of this specification at the exhaust port of the acidic gas. Of course, the above-mentioned swirl vane 6 with the optimal specification is a specific example within the protection scope of this embodiment. Setting other specifications of swirl vanes 6 at the outlet of the acidic gas passage 5 also belongs to the protection scope of this embodiment. This embodiment does not specifically limit the specifications of the swirl vane 6.

[0035] In practical applications, setting the swirl vane 6 can change the flow field of the acidic gas guided by the acidic gas passage 5. Driven by the swirling flow field, the acidic gas is vortex-mixed with the fuel gas, oxygen, and combustion-supporting air for combustion, improving the mixing uniformity, and further improving the combustion efficiency in the combustion chamber body 1, that is, the combustion conversion rate of the acidic gas. By using the sulfur recovery burner provided by the present invention, the mixing uniformity of the acidic gas, dye gas, oxygen, and combustion-supporting air flowing into the combustion chamber body 1 is improved, making the above-mentioned mixed gas burn sufficiently and improving the combustion conversion rate of the acidic gas.

[0036] Embodiment 2

[0037] Based on the above-mentioned Embodiment 1, this embodiment further describes this solution in detail. The specific solution is as follows:

[0038] In a specific implementation manner, the throat 7 of the combustion chamber body 1 is a shrinking cone.

[0039] In a specific implementation manner, please refer to Figure 3 , the combustion chamber body 1 includes: a housing 8 arranged on the outermost layer, a heat insulation cotton 9 arranged on the inner side wall of the housing 8, a heat preservation refractory brick 10 arranged on the inner side wall of the heat insulation cotton 9, a used refractory brick 11 arranged on the inner side wall of the heat preservation refractory brick 10, a castable 12 injection-molded at the throat 7, and an adiabatic filter paper 13 laid on the outer side wall of the throat 7.

[0040] In a specific embodiment, a housing adapted to the size of the throat 7 is provided on the outer sidewall of the throat 7, and the material of the housing is stainless steel. Under the continuous scouring of the mixed gas, the use of the above-mentioned stainless steel material can effectively extend the service life of the housing.

[0041] In a specific embodiment, please refer to Figure 4 , Figure 6 , the oxygen channel 4 is arranged at the axis position of the combustion chamber body 1. The end of the first exhaust port 15 of the oxygen channel 4 is closed, and a first inclined hole 16 is opened at the end of the first exhaust port 15. The included angle between the axis of the first inclined hole 16 and the axis of the oxygen channel 4 is greater than 0°. The fuel gas channel 2 is arranged outside the oxygen channel 4. The end of the second exhaust port 17 of the fuel gas channel 2 is closed with the sidewall of the oxygen channel 4, and a second inclined hole 18 is opened at the end of the second exhaust port 17. The included angle between the axis of the second inclined hole 18 and the axis of the oxygen channel 4 is greater than 0°, and the axis of the second inclined hole 18 is not parallel to the axis of the first inclined hole 16. The extension line of the axis of the first inclined hole 16 towards the outside of the oxygen channel 4 is the first extension line. The extension line of the second inclined hole 18 towards the outside of the fuel gas channel 2 is the second extension line, and the first extension line intersects with the second extension line. The combustion-supporting air channel 3 is arranged outside the fuel gas channel 2.

[0042] Specifically, the end of the above-mentioned oxygen channel 4 is closed, and an inclined hole is opened at the closed position, so that the oxygen discharged from the end of the first exhaust port 15 of the above-mentioned oxygen pipeline flows obliquely. In this embodiment, a wind distribution chamber can be arranged outside the throat 7 of the combustion chamber body 1. In the wind distribution chamber, the obliquely flowing oxygen shears with the combustion-supporting air, fuel gas and acidic gas, so that the above-mentioned gases are further fully mixed. The end of the second exhaust port 17 of the above-mentioned fuel gas channel 2 is closed, and a second inclined hole 18 is opened at the closed position, and the axis of the first inclined hole 16 is not parallel to the axis of the second inclined hole 18, so that the above-mentioned fuel gas and oxygen can also shear with each other, and further improve the mixing uniformity of the mixed gas.

[0043] It should be noted that a plurality of first inclined holes 16 may be formed at the end of the first exhaust port 15, or the first inclined holes 16 may be connected to form a trapezoidal first annular channel. The inner diameter of the first annular channel near the end of the first exhaust port 15 is larger than the inner diameter of the first annular channel far from the end of the first exhaust port 15. A plurality of second inclined holes 18 may be formed at the end of the second exhaust port 17, or the second inclined holes 18 may be connected to form a trapezoidal second annular channel. The inner diameter of the second annular channel near the end of the second exhaust port 17 is larger than the inner diameter of the second annular channel far from the end of the second exhaust port 17. The above settings facilitate the shearing action between the fuel gas and oxygen, and further improve the mixing uniformity of the mixed gas.

[0044] In a specific embodiment, the end of the third exhaust port 19 of the combustion-supporting air channel 3 is communicated.

[0045] In a specific embodiment, a plurality of flame observation hole channels 20 and a plurality of igniter channels 14 are provided on the side wall of the combustion chamber cup body. An igniter is provided in the igniter channel 14. The igniter is used to ignite the mixed gas, and the flame observation hole channel 20 is used to observe the flame combustion condition in the combustion chamber body 1, so as to facilitate the user to make appropriate adjustments according to the flame condition.

[0046] In a specific embodiment, the combustion-supporting air channel 3 and the fuel gas channel 2 are connected by a flange. The above method of connecting two pipes by a flange belongs to the conventional technical means in the art.

[0047] In a specific embodiment, please refer to Figure 1 , the swirl vane 6 is connected to the combustion-supporting air channel 3 by a flange.

[0048] In a specific embodiment, please refer to Figure 4 , the oxygen channel 4 and the fuel gas channel 2 are of an integral structure.

[0049] In this embodiment, the burner consists of a gas box with a refractory-lined combustion chamber, a combustion air regulator, a fuel gas gun, and a gas nose. The movable combustion air regulator is fixed in the burner through a cover plate, and the cover plate is fixed to the front side of the combustion chamber housing 8 with screws. The main design feature of the acid gas burner is to strongly vortex-mix the acid gas (or fuel gas during startup) with the combustion air. The combustion air passes through the air distribution chamber and then obtains strong rotational power with the help of the radial compound blades in the combustion air regulator. The combustion air reaches its maximum speed after leaving the gas nose. The acid gas generates a rotational vortex after passing through the swirler 6, enabling the above-mentioned acid gas to be fully mixed with other gases. Outside the throat 7 of the combustion chamber body 1, the fuel gas, oxygen, combustion air, and acid gas are fully mixed. The fuel gas gun is equipped with a conical diffuser, and the gas can be discharged from it (the tip of the fuel gas gun nozzle). The part containing the front flame of the flame forms a large turbulence intensity and helps achieve a high combustion efficiency. The pneumatic design causes strong vortices to form near the angled walls and close to the fuel gas gun in the refractory-lined combustion chamber. These vortices stabilize the flame and achieve a high heat energy concentration at the front of the reaction chamber. Therefore, the oxidation reaction can occur at the highest temperature.

[0050] In practical applications, by setting the swirler 6, the flow field of the acid gas guided through the acid gas channel 5 can be changed. Driven by the swirling acid gas, the fuel gas, oxygen for combustion, and combustion air for assisting combustion are vortex-mixed, improving the mixing uniformity, and thus improving the combustion efficiency in the combustion chamber body 1, that is, the combustion conversion rate of the acid gas. By using the sulfur recovery burner provided by the present invention, the mixing uniformity of the acid gas, dye gas, oxygen, and combustion air flowing into the combustion chamber body 1 is improved, enabling the above-mentioned mixed gas to burn fully and increasing the combustion conversion rate of the acid gas.

[0051] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0052] Each embodiment in this specification is described in a related manner. For the same or similar parts among the embodiments, reference can be made to each other. Each embodiment focuses on the differences from other embodiments. The above description is only for the preferred embodiments of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are all included in the protection scope of the present invention.

Claims

1. A sulfur recovery burner, characterized in that, Comprising: A combustion chamber body, a fuel gas channel for supplying fuel gas to the combustion chamber body, a combustion-supporting air channel for supplying combustion-supporting air to the combustion chamber body, an oxygen channel for supplying oxygen to the combustion chamber body, and an acid gas channel for supplying acid gas to the combustion chamber body; A swirler is provided at the outlet of the acid gas channel. After the acid gas passes through the swirler and mixes with the combustion-supporting air, the fuel gas, the oxygen, and the combustion-supporting air, it enters the combustion chamber body for combustion; A reciprocating blade is provided at the outlet of the combustion-supporting air channel; The oxygen channel is arranged at the axial position of the combustion chamber body. The end of the first exhaust port of the oxygen channel is closed, and a first inclined hole is opened at the end of the first exhaust port. The included angle between the axis of the first inclined hole and the axis of the oxygen channel is greater than 0°; The fuel gas channel is arranged outside the oxygen channel; the end of the second exhaust port of the fuel gas channel is closed with the side wall of the oxygen channel, and a second inclined hole is opened at the end of the second exhaust port. The included angle between the axis of the second inclined hole and the axis of the oxygen channel is greater than 0°, and the axis of the second inclined hole is not parallel to the axis of the first inclined hole; The extension line of the axis of the first inclined hole towards the outside of the oxygen channel is the first extension line; the extension line of the second inclined hole towards the outside of the fuel gas channel is the second extension line, and the first extension line intersects with the second extension line; The combustion-supporting air channel is arranged outside the fuel gas channel; The fuel gas channel and the oxygen channel are of an integral structure, and the two together form a fuel gas gun. The fuel gas gun is inserted into the combustion-supporting air channel and connected to the combustion-supporting air channel through a flange and a cover plate; The throat of the combustion chamber body is a contracted cone; The combustion chamber body includes: a shell arranged on the outermost layer, a heat insulation cotton arranged on the inner side wall of the shell, a heat preservation refractory brick arranged on the inner side wall of the heat insulation cotton, an old refractory brick arranged on the inner side wall of the heat preservation refractory brick, a castable injected at the throat, and an adiabatic filter paper laid on the outer side wall of the throat; An outer shell adapted to the size of the throat is arranged on the outer side wall of the throat, and the material of the outer shell is stainless steel.

2. The sulfur recovery burner according to claim 1, wherein The third exhaust port ends of the combustion-supporting air channel are communicated.

3. The sulfur recovery burner according to claim 1, characterized in that, A plurality of fire-viewing hole channels and a plurality of igniter channels are arranged on the side wall of the combustion chamber body; an igniter is arranged in the igniter channel.

4. The sulfur recovery burner according to claim 1, characterized in that, The combustion-supporting air channel is connected to the fuel gas channel through a flange.

5. The sulfur recovery burner according to claim 1, characterized in that, The swirler is connected to the combustion-supporting air channel through a flange.

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