Supplemental combustion sulfur burner and control method

Abstract

The application provides a combustion device for preparing sulfur by combustion complement, which comprises a shell, a main combustion gas gun, an acid gas gun, a combustion complement gas gun and a main combustion air pipeline, a wind guide tube is arranged in the shell, a main fire channel is arranged at the end of the wind guide tube, an ignition gun is arranged on the main fire channel, a combustion supporting chamber is arranged in the wind guide tube, the acid gas gun is arranged in the combustion supporting chamber, the main combustion gas gun is arranged in the acid gas gun, a combustion complement fire channel is arranged in the lining around the main fire channel, the combustion complement gas gun and the combustion complement air gun are arranged in the combustion complement fire channel, and the combustion complement gas gun and the combustion complement air gun are used for providing high-temperature flue gas into the main fire channel. The combustion complement gas and the combustion complement air are completely combusted in the combustion complement fire channel before entering the main fire channel, and the heat is completely released, so that on the one hand, the total flue gas temperature reaches the temperature required by the sulfur preparation process under the condition that the principle of preparing sulfur by acid gas is not changed, and the sulfur recovery rate is improved; on the other hand, the completely combusted gas avoids generating carbon black, and thus the quality of sulfur is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of burners, in particular, to a supplemental combustion sulfur burner and a control method. BACKGROUND

[0002] The reaction principle of acid gas (main component is H2S) for sulfur is as follows:

[0003] 3H2S+3 / 2O2→2H2S+SO2+H2O; 2H2S+SO2→3 / 2S2+2H2O.

[0004] From the reaction principle, it can be known that in the acid gas combustion process, only one-third of H2S is provided with oxygen, that is, it is completed in an oxygen-deficient state, one-third of H2S is oxidized into SO2, and the remaining two-thirds of H2S reacts with the SO2 generated in the early stage to finally generate S2. Too much or too little oxygen supply will affect the S2 generation rate. The entire combustion reaction process of acid gas in the furnace is completed in an oxygen-deficient state.

[0005] In the acid gas sulfur production process, the flame temperature of acid gas combustion must reach above 950℃, and the acid gas can be stably combusted. The acid gas combustion temperature is closely related to the H2S concentration in the acid gas. The higher the H2S concentration in the acid gas, the higher the combustion temperature. In the industry, the acid gas combustion temperature is generally between 950-1350℃. When the H2S concentration in the acid gas is low, the acid gas combustion temperature cannot reach above 950℃, and the acid gas cannot be continuously and stably combusted, and the entire sulfur production process cannot continue.

[0006] In the coal chemical industry, coal power, synthetic ammonia and other related industries, the acid gas concentration in the acid gas sulfur production device is generally low, and the lowest acid gas concentration is only 20%. At such a low acid gas concentration, the acid gas combustion temperature is too low in the oxygen-deficient sulfur production process, and the combustion reaction temperature cannot reach the stable combustion temperature, so the sulfur production process cannot continue. The commonly used measure in the industry is to increase the flame temperature by preheating the acid gas, preheating the air, splitting the acid gas, and using oxygen-enriched and pure oxygen combustion to ensure that the acid gas can be stably combusted and the sulfur production process can be completed.

[0007] The existing problems are that when the acid gas concentration is low, if the preheated acid gas and the preheated combustion air are used, additional heat exchange equipment is needed, a larger floor area is occupied, a large one-time investment is needed, and when the acid gas concentration is too low, the preheated acid gas and the preheated combustion air cannot meet the process requirements; if the oxygen-enriched air or pure oxygen combustion is used, the oxygen equipment needs to be increased, and the investment is increased; although the oxygen-enriched air or pure oxygen can effectively improve the acid gas combustion reaction temperature, the fuel gas cannot be combusted by using the pure oxygen or oxygen-enriched air during the temperature rising and oven drying of the sulfur production furnace, otherwise, the fuel gas is combusted by using the pure oxygen or oxygen-enriched air, the combustion temperature is too high, the equipment is easily damaged, the combustor design needs to consider the combustion of the fuel gas and air and the combustion of the acid gas and pure oxygen at the same time, the combustor structure is relatively complex, the equipment is expensive, and the operation requirement of the combustor is relatively high; if the acid gas is divided into streams, the furnace temperature can only be slightly increased. When the acid gas concentration is too low or the device needs to produce sulfur and ammonia at the same time, even if the above measures are used, the flame (furnace) temperature is difficult to meet the requirements.

[0008] When there is no other way, the industry also has the measure of supplementing combustion to improve the furnace temperature, but there are great disadvantages. For example, under the condition of oxygen deficiency, the supplemented fuel gas cannot be completely combusted, the fuel heat cannot be completely released, the fuel gas that is not completely combusted is easy to generate carbon black, and the quality of sulfur is affected.

[0009] The patent with the application number CN201621130344.5 in the prior art discloses an acid gas reaction furnace combustor, which comprises a shell, a supplementary combustion gas lance, an acid gas lance, a main combustion gas lance, an air swirler, a heat insulation lining and a refractory lining, an auxiliary combustion air inlet is arranged at the upper portion of the shell, the heat insulation lining and the refractory lining are sequentially arranged on the inner wall of the shell, a wind guide cylinder is arranged in the shell, a combustion chamber is arranged at the end of the wind guide cylinder, an auxiliary combustion chamber is arranged in the wind guide cylinder, the acid gas lance is arranged in the auxiliary combustion chamber, the supplementary combustion gas lance is arranged in the acid gas lance, a throat pipe is arranged at the end of the auxiliary combustion chamber, and the air swirler is arranged outside the throat pipe. Although the patent improves the sulfur recovery rate to a certain extent, the supplementary combustion gas lance is arranged in the wind guide cylinder, the wind guide cylinder is in an oxygen-deficient state, the supplemented fuel gas cannot be completely combusted, the fuel heat cannot be completely released, the fuel gas that is not completely combusted is easy to generate carbon black, and the quality of sulfur is affected.

[0010] Therefore, the present application is provided. SUMMARY

[0011] The present application aims to provide a supplementary combustion sulfur production combustor and a control method, so as to solve the problems in the prior art that the supplementary combustion gas lance is arranged in the wind guide cylinder, the wind guide cylinder is in an oxygen-deficient state, the supplemented fuel gas cannot be completely combusted, the fuel heat cannot be completely released, the fuel gas that is not completely combusted is easy to generate carbon black, and the quality of sulfur is affected.

[0012] To achieve the above object, the technical scheme of the present application is as follows:

[0013] The combustion device for producing sulfur by combustion of supplementary fuel comprises a shell, a main fuel gun, an acid gas gun, a supplementary fuel gun and a main combustion air pipeline, a wind guide tube is arranged in the interior of the shell, a main fire channel is arranged at the end of the wind guide tube, an ignition gun is arranged on the main fire channel, a combustion air chamber is arranged in the wind guide tube, the acid gas gun is arranged in the combustion air chamber, the main fuel gun is arranged in the acid gas gun, a supplementary fire channel is arranged in the lining around the main fire channel, the supplementary fuel gun and the supplementary combustion air gun are arranged on the supplementary fire channel, and the supplementary fuel gun and the supplementary combustion air gun are used for providing high-temperature flue gas into the main fire channel.

[0014] The combustion device for producing sulfur by combustion of supplementary fuel, the supplementary fuel gun and the supplementary combustion air gun are arranged on the supplementary fire channel, the supplementary fuel and the supplementary combustion air are completely combusted to form high-temperature flue gas in the supplementary fire channel before entering the main fire channel, and the fuel heat is completely released, so that the total flue gas temperature reaches the temperature required by the sulfur production process under the condition that the principle of producing sulfur by combustion of acid gas is not changed, the sulfur recovery rate is improved, and the completely combusted fuel gas avoids the generation of carbon black, thereby improving the quality of sulfur.

[0015] Further, the supplementary fire channel comprises a first supplementary fire channel and a second supplementary fire channel, the supplementary fuel gun is arranged in the first supplementary fire channel, and the supplementary combustion air gun is arranged in the second supplementary fire channel.

[0016] Further, a main fuel pipeline is arranged on the shell, a main fuel switch valve is arranged between the main fuel gun and the main fuel pipeline, a total fuel gas inlet is arranged on the main fuel pipeline, and the supplementary fuel gun is in communication with the main fuel pipeline.

[0017] The arrangement reduces the change of the structure of the combustion device, is low in cost, simple in operation, does not need to additionally increase the equipment for providing the supplementary fuel, and does not need to occupy a larger floor area.

[0018] Further, a main combustion air pipeline is arranged on the shell, a total combustion air inlet is arranged on the main combustion air pipeline, and the supplementary combustion air gun is in communication with the main combustion air pipeline.

[0019] The arrangement reduces the change of the structure of the combustion device, is low in cost, simple in operation, does not need to additionally increase the equipment for providing the supplementary combustion air, and does not need to occupy a larger floor area.

[0020] Further, a supplementary fuel pipeline is arranged between the main fuel pipeline and the supplementary fuel gun, a supplementary fuel adjusting valve, a supplementary fuel flowmeter and a supplementary fuel switch valve are arranged on the supplementary fuel pipeline.

[0021] The arrangement facilitates opening of the supplementary combustion gas gun, and facilitates statistics and adjustment of the flow of supplementary combustion gas into the supplementary combustion gas gun.

[0022] Further, a supplementary combustion air pipe is arranged between the main combustion air pipe and the supplementary combustion air gun, and a supplementary combustion air adjusting valve, a supplementary combustion air flow meter and a supplementary combustion air on-off valve are arranged on the supplementary combustion air pipe.

[0023] The arrangement facilitates opening of the supplementary combustion air gun, and facilitates statistics and adjustment of the flow of supplementary combustion air into the supplementary combustion air gun 5.

[0024] Further, a supplementary combustion gas nozzle is arranged at the end of the supplementary combustion gas gun, and a first flame stabilizer is arranged on the outer circumferential side of the supplementary combustion gas nozzle.

[0025] Further, a supplementary combustion air nozzle is arranged at the end of the supplementary combustion air gun, and a second flame stabilizer is arranged on the outer circumferential side of the supplementary combustion air nozzle.

[0026] Further, a supplementary combustion gas annular gas collecting chamber is arranged between the supplementary combustion gas pipe and the supplementary combustion gas gun, and a supplementary combustion air annular gas collecting chamber is arranged between the supplementary combustion air pipe and the supplementary combustion air gun.

[0027] The second aspect of the present application provides a control method of the supplementary combustion sulfur production burner, the control method of the supplementary combustion sulfur production burner is any one of the supplementary combustion sulfur production burners, and the control method of the supplementary combustion sulfur production burner comprises the following steps:

[0028] S1, starting operation;

[0029] S2, introducing fuel gas into the main gas gun and introducing combustion air into the main combustion air pipe;

[0030] S3, judging whether the temperature in the main flue is greater than 950 DEG C; if yes, entering step S4, and if no, returning to step S2;

[0031] S4, introducing acid gas into the acid gas gun;

[0032] S5, judging whether the temperature in the main flue is greater than 950 DEG C; if yes, keeping the present situation, and if no, entering step S6;

[0033] S6, stopping introducing fuel gas into the main gas gun, opening the supplementary combustion gas gun and the supplementary combustion air gun, and providing high-temperature flue gas into the main flue.

[0034] The present application provides a supplementary combustion sulfur production burner and a control method, and the supplementary combustion sulfur production burner and the control method have the following beneficial effects compared with the prior art:

[0035] 1) The combustion device and control method for sulfur production according to the present application, the supplemental combustion gas and supplemental combustion air are completely combusted in the supplemental combustion channel to form high-temperature flue gas before entering the main combustion channel, and the fuel heat is completely released, so that the total flue gas temperature reaches the temperature required by the sulfur production process, and the sulfur recovery rate is improved.

[0036] 2) The combustion device and control method for sulfur production according to the present application, the completely combusted gas, thereby avoiding the generation of carbon black, and further improving the quality of sulfur.

[0037] 3) The combustion device and control method for sulfur production according to the present application, the structure of the combustion device is slightly changed, the cost is low, the operation is simple, no additional heat exchange equipment is needed, and no larger land area is occupied.

[0038] 4) The combustion device and control method for sulfur production according to the present application, the supplemental combustion gas and supplemental combustion air are completely combusted in the supplemental combustion channel, the fuel heat is completely released, high-temperature flue gas of about 1400-1500℃ is generated, the process conditions of ammonia burning are met at the same time, the crystallization and blockage of ammonium salt are avoided, the corrosion of equipment is avoided, and the number of shutdowns is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 The cross-sectional structure schematic diagram of the combustion device for sulfur production according to the present application is shown in the embodiment of the present application.

[0040] Figure 2 The enlarged structure schematic diagram of A in the embodiment of the present application is shown in the embodiment of the present application. Figure 1

[0041] Figure 3 The left view structure schematic diagram of the combustion device for sulfur production according to the present application is shown in the embodiment of the present application.

[0042] BRIEF DESCRIPTION OF DRAWINGS

[0043] ​1, main gas gun; 101, total gas inlet; 102, main gas nozzle; 103, main gas on-off valve; 104, main gas pipeline; 2, supplementary gas gun; 201, supplementary gas nozzle; 202, supplementary gas interface; 203, supplementary gas regulating valve; 204, supplementary gas pipeline; 205, supplementary gas flowmeter; 206, supplementary gas on-off valve; 207, supplementary annular gas collecting chamber inlet; 208, supplementary annular gas collecting chamber; 209, first flame stabilizer; 210, first supplementary combustion channel; 3, main combustion air pipeline; 301, total air inlet; 4, acid gas gun; 401, acid gas inlet; 402, acid gas nozzle; 403, acid gas pipeline; 5, supplementary air gun; 501, supplementary air interface; 502, supplementary air regulating valve; 503, supplementary air pipeline; 504, supplementary air flowmeter; 505, supplementary air on-off valve; 506, supplementary air annular gas collecting chamber inlet; 507, supplementary air annular gas collecting chamber; 508, supplementary air nozzle; 509, second flame stabilizer; 510, second supplementary combustion channel; 6, ignition gun; 7, shell; 8, air swirler; 9, heat insulation lining; 10, refractory lining; 11, main combustion channel; 12, air duct; 13, throat. DETAILED DESCRIPTION

[0044] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict. The description of "first", "second" and the like in the embodiments of the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implying the number of the indicated technical features. Therefore, the features with "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of a person skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the protection scope required by the present application.

[0045] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0046] Embodiment 1

[0047] The present embodiment proposes a supplementary combustion sulfur production burner, such as Figures 1 to 3As shown, the afterburning sulfur burner comprises a shell 7, a main gas gun 1, an acid gas gun 4, an afterburning gas gun 2 and a main combustion air duct 3, a wind guide 12 is arranged in the shell 7, a main fire channel 11 is arranged at the end of the wind guide 12, an ignition gun 6 is arranged on the main fire channel 11, a combustion air chamber is arranged in the wind guide 12, the acid gas gun 4 is arranged in the combustion air chamber, the main gas gun 1 is arranged in the acid gas gun 4, an afterburning fire channel is arranged in the lining around the main fire channel 11, the afterburning gas gun 2 and the afterburning air gun 5 are arranged on the afterburning fire channel, and the afterburning gas gun 2 and the afterburning air gun 5 are used to provide high-temperature flue gas into the main fire channel 11.

[0048] The afterburning sulfur burner provided by the embodiment has the afterburning gas gun 2 and the afterburning air gun 5 arranged on the main fire channel 11, the afterburning gas and the afterburning air are completely combusted in the afterburning fire channel before entering the main fire channel 11, the fuel heat is completely released, the completely combusted high-temperature flue gas is mixed with the low-temperature flue gas combusted by the acid gas in the main fire channel 11, and the temperature of the mixed flue gas is above 950 ℃ or above 1250 ℃, which is the temperature for burning NH3. First, the total air volume provided for the acid gas remains unchanged in the case that the principle of the acid gas sulfur production is unchanged, the sulfur production process is still in the original oxygen-deficient state, the total flue gas temperature in the main fire channel 11 reaches the temperature required by the sulfur production process, and the sulfur recovery rate is improved; second, the completely combusted flue gas avoids the generation of carbon black, and thus the quality of the sulfur is improved; third, the structure of the burner is slightly changed, the cost is low, the operation is simple, no additional heat exchange equipment is needed, and no larger land occupation is needed; fourth, the process conditions for burning NH3 are met while the process conditions for the sulfur production are met, the crystallization and blockage of the ammonium salt are avoided, the corrosion of the equipment is avoided, and the number of shutdowns is reduced.

[0049] Specifically, as shown in Figure 1 The afterburning fire channel comprises a first afterburning fire channel 210 and a second afterburning fire channel 510, the afterburning gas gun 2 is arranged in the first afterburning fire channel 210, and the afterburning air gun 5 is arranged in the second afterburning fire channel 510.

[0050] The number of the afterburning gas gun 2 and the afterburning air gun 5 is not limited.

[0051] The number of the afterburning gas gun 2 and the afterburning air gun 5 can be 3-6 according to the required afterburning amount of the burner.

[0052] As shown in Figure 1 The first afterburning fire channel 210 and the second afterburning fire channel 510 are arranged one by one on the circumference of the main fire channel 11.

[0053] The first afterburning fire channel 210 and the second afterburning fire channel 510 are evenly distributed on the circumference of the main fire channel 11.

[0054] Specifically, the number of the afterburning gas guns 2 is not limited. The number of afterburning gas guns 2 can be set to three, four, five, or six. In this embodiment, the number of afterburning gas guns 2 is set to four.

[0055] Specifically, the number of afterburning air guns 5 is not limited. The number of afterburning air guns 5 can be set to three, four, five, or six. In this embodiment, the number of afterburning air guns 5 is set to four.

[0056] Specifically, the placement of the afterburning gas gun 2 and the afterburning air gun 5 on the main combustion channel 11 is not limited. The afterburning gas gun 2 and the afterburning air gun 5 may be placed on opposite sides of the main combustion channel 11 or on the same side of the main combustion channel 11.

[0057] In this embodiment, as Figure 1 As shown, the afterburning gas gun 2 and the afterburning air gun 5 are positioned on opposite sides of the main combustion channel 11. This arrangement facilitates thorough mixing and combustion of the afterburning gas and afterburning air.

[0058] Specifically, such as Figure 1 As shown, a total air inlet 301 and a total gas inlet 101 are provided on the upper part of the shell 7. A heat insulation lining 9 and a fire-resistant lining 10 are sequentially provided on the inner wall of the shell 7. A throat pipe 13 is provided at the end of the combustion chamber. An air cyclone separator 8 is provided outside the throat pipe 13.

[0059] Specifically, such as Figure 1 As shown, an acid gas pipe 403 is provided on the housing 7, an acid gas inlet 401 is provided on the acid gas pipe 403, the acid gas gun 4 is connected to the acid gas pipe 403, and an acid gas nozzle 402 is provided at the end of the acid gas gun 4.

[0060] Specifically, such as Figure 1 As shown, the central axis of the main gas gun 1 is concentric with the central axis of the main fire channel 11.

[0061] Specifically, such as Figure 1 As shown, a main gas pipeline 104 is provided on the housing 7, the main gas gun 1 is connected to the main gas pipeline 104, a main gas switch valve 103 is provided between the main gas gun 1 and the main gas pipeline 104, a total gas inlet 101 is provided on the main gas pipeline 104, and the supplementary combustion gas gun 2 is connected to the main gas pipeline 104.

[0062] This setup requires minimal modifications to the burner structure, is low-cost, easy to operate, does not require additional equipment to provide supplemental combustion gas, and does not require a larger footprint.

[0063] More specifically, as shown in FIG. 1, a main combustion gas pipeline 104 is arranged at the outer end of the main combustion gas gun 1, and a main combustion gas nozzle 102 is arranged at the end of the main combustion gas gun 1. Figure 1

[0064] Specifically, a main combustion air pipeline 3 is arranged on the shell 7, a total air inlet 301 is arranged on the main combustion air pipeline 3, and the supplementary combustion air gun 5 is in communication with the main combustion air pipeline 3.

[0065] This arrangement reduces the changes in the structure of the burner, is low in cost, simple to operate, does not need to additionally increase the equipment for providing supplementary combustion air, and does not need to occupy a larger floor area.

[0066] More specifically, as shown in FIG. 1, a supplementary combustion gas pipeline 204 is arranged between the main combustion gas pipeline 104 and the supplementary combustion gas gun 2, one end of the supplementary combustion gas pipeline 204 is in communication with the main combustion gas pipeline 104, and the other end of the supplementary combustion gas pipeline 204 is in communication with the supplementary combustion gas gun 2. Figure 2 Figure 3 A supplementary combustion gas regulating valve 203, a supplementary combustion gas flow meter 205, and a supplementary combustion gas on-off valve 206 are arranged on the supplementary combustion gas pipeline 204.

[0067] This arrangement facilitates the opening of the supplementary combustion gas gun 2 and also facilitates the statistics and adjustment of the flow of the supplementary combustion gas into the supplementary combustion gas gun 2.

[0068] A supplementary combustion gas interface 202 is arranged at the end of the supplementary combustion gas pipeline 204 in communication with the main combustion gas pipeline 104.

[0069] Specifically, a supplementary combustion air pipeline 503 is arranged between the main combustion air pipeline 3 and the supplementary combustion air gun 5, and a supplementary combustion air interface 501 is arranged at the end of the supplementary combustion air pipeline 503 in communication with the main combustion air pipeline 3.

[0070] Specifically, as shown in FIG. 1, a supplementary combustion air regulating valve 502, a supplementary combustion air flow meter 504, and a supplementary combustion air on-off valve 505 are arranged on the supplementary combustion air pipeline 503. Figure 3

[0071] This arrangement facilitates the opening of the supplementary combustion air gun 5 and also facilitates the statistics and adjustment of the flow of the supplementary combustion air into the supplementary combustion air gun 5.

[0072] Specifically, as shown in FIG. 1, a supplementary combustion gas nozzle 201 is arranged at the end of the supplementary combustion gas gun 2, and the first flame stabilizer 209 is arranged at the outer peripheral side of the supplementary combustion gas nozzle 201. Figure 2 Specifically, as shown in FIG. 1, a supplementary combustion gas nozzle 201 is arranged at the end of the supplementary combustion gas gun 2, and the first flame stabilizer 209 is arranged at the outer peripheral side of the supplementary combustion gas nozzle 201.

[0073] Figure 1 ​​​​As shown, a combustion air nozzle 508 is arranged at the end of the combustion air gun 5, and a second flame stabilizer 509 is arranged at the outer circumferential side of the combustion air nozzle 508.

[0074] Specifically, as shown, Figure 1 As shown, a combustion air nozzle 508 is arranged at the end of the combustion air gun 5, and a second flame stabilizer 509 is arranged at the outer circumferential side of the combustion air nozzle 508.

[0075] Specifically, as shown, Figure 1 As shown, a combustion air nozzle 508 is arranged at the end of the combustion air gun 5, and a second flame stabilizer 509 is arranged at the outer circumferential side of the combustion air nozzle 508.

[0076] For the combustion air gun 5, in addition to the shell 7, the main gas gun 1, the acid gas gun 4, the main combustion air pipe 3, the main flue 11, the combustion gas gun 2, the combustion air gun 5 and the combustion flue, other related components are included, and the specific structure and the specific assembly relationship of the related components are prior art, which will not be described here.

[0077] The combustion air gun 5 of the present embodiment is arranged in the lining around the main flue 11, and the combustion gas gun 2 and the combustion air gun 5 are arranged in the combustion flue. The combustion gas and the combustion air are completely combusted in the combustion flue before entering the main flue 11, and the fuel heat is completely released to generate high-temperature flue gas of about 1400-1500℃. The high-temperature flue gas generated by the complete combustion of the combustion gas and the combustion air is mixed with the low-temperature flue gas generated by the combustion of the acid gas in the main flue 11. First, the total air volume provided for the acid gas remains unchanged under the condition that the principle of the acid gas sulfur production is unchanged, and the sulfur production process is still in the original oxygen-deficient state, so that the total flue gas temperature in the main flue 11 reaches the temperature required by the sulfur production process, thereby improving the sulfur recovery rate. Second, the completely combusted gas avoids the generation of carbon black, thereby improving the quality of sulfur. Third, the structure of the burner is changed little, the cost is low, the operation is simple, no additional heat exchange equipment is needed, and no larger floor area is occupied. Fourth, the process conditions of ammonia burning are met while the process conditions of sulfur production are met, the crystallization and blockage of ammonium salt are avoided, and the corrosion of equipment is avoided, thereby reducing the number of shutdowns.

[0078] Embodiment 2

[0079] The present embodiment proposes a control method of a combustion air gun 5, which uses a combustion air gun 5 as claimed in any one of embodiments 1-3. The control method of the combustion air gun 5 comprises the following steps:

[0080] S1, start running;

[0081] S2, gas is introduced into the main gas gun 1, and combustion-supporting air is introduced into the main combustion-supporting air pipe 3;

[0082] Specifically, the main gas switch valve 103 is opened, gas is introduced into the main gas gun 1 through the total gas inlet 101 on the main gas pipe 104, and combustion-supporting air is introduced into the shell 1 through the total air inlet 301 of the main combustion-supporting air pipe 3.

[0083] The step S2 can be performed in the pre-construction stage to bake the furnace and increase the temperature of the main fire channel 11 in the burner, thereby facilitating the combustion of the acid gas in the later stage.

[0084] S3, determining whether the temperature in the main fire channel 11 is greater than 950℃; if yes, entering step S4, if no, returning to step S2;

[0085] Specifically, the temperature in the main fire channel 11 is detected by a temperature sensor in the main fire channel 11.

[0086] The step S3 is configured to determine whether to introduce acid gas by determining whether the temperature in the main fire channel 11 is greater than 950℃.

[0087] S4, acid gas is introduced into the acid gas gun 4;

[0088] The step S4 is configured to ensure stable combustion of the acid gas.

[0089] S5, determining whether the temperature in the main fire channel 11 is greater than 950℃; if yes, maintaining the status, if no, entering step S6;

[0090] The step S5 is configured to determine whether to supplement combustion by determining whether the temperature in the main fire channel 11 is greater than 950℃.

[0091] S6, stopping the introduction of gas into the main gas gun 1, opening the supplemental combustion gas gun 2 and the supplemental combustion air gun 5, and providing high-temperature flue gas into the main fire channel 11.

[0092] Specifically, in step S6, the main gas switch valve 103 is closed to stop the introduction of gas into the main gas gun 1, the supplemental combustion gas switch valve 206 and the supplemental combustion air switch valve 505 are opened, the supplemental combustion gas gun 2 and the supplemental combustion air gun 5 are opened, the ratio of the supplemental combustion fuel quantity and the supplemental combustion air quantity is controlled to ensure that the hot flue gas is injected into the main fire channel 11 after the complete combustion of the two in the supplemental combustion fire channel, and the hot flue gas is mixed with the acid gas in the main fire channel 11.

[0093] The setting of step S6 makes the supplemental combustion gas and the supplemental combustion air fully combust in the supplemental combustion before entering the main fire channel 11, the fuel heat is fully released, high-temperature flue gas of about 1400-1500℃ is generated, the high-temperature flue gas generated by the supplemental combustion gas and the supplemental combustion air is mixed with the low-temperature flue gas generated by the combustion of the acid gas in the main fire channel 11, the total air volume provided for the acid gas remains unchanged in the case that the principle of the acid gas sulfur production is not changed, the sulfur production process is still in the original oxygen deficiency state, the total flue gas temperature in the main fire channel 11 reaches the temperature required by the sulfur production process, the sulfur recovery rate is improved, the gas is fully combusted, thereby avoiding the generation of carbon black, and further improving the quality of sulfur, the structure of the burner is changed little, the cost is low, the operation is simple, no additional heat exchange equipment is needed, and no larger land occupation is needed, the process conditions of the ammonia burning are met at the same time as the sulfur production process conditions are met, the ammonium salt crystallization blockage and the corrosion of the equipment are avoided, and the parking frequency is reduced.

[0094] Specifically, the ratio of the supplemental combustion fuel amount and the supplemental combustion air amount is greater than 1:10, and the fully combusted hot flue gas is sprayed into the main fire channel 11 after the complete combustion of the supplemental combustion gas and the supplemental combustion air in the supplemental combustion channel, and is mixed with the hot flue gas generated by the combustion of the acid gas in the main fire channel 11.

[0095] The control method of the supplemental combustion sulfur production burner described in the embodiment is associated with steps S1-S6 and cannot be separated, and plays multiple roles. First, the supplemental combustion gas and the supplemental combustion air are fully combusted in the supplemental combustion channel before entering the main fire channel 11, the fuel heat is fully released, high-temperature flue gas of about 1400-1500℃ is generated, the high-temperature flue gas generated by the supplemental combustion gas and the supplemental combustion air is mixed with the low-temperature flue gas generated by the combustion of the acid gas in the main fire channel 11, the total air volume provided for the acid gas remains unchanged in the case that the principle of the acid gas sulfur production is not changed, the sulfur production process is still in the original oxygen deficiency state, the total flue gas temperature in the main fire channel 11 reaches the temperature required by the sulfur production process, the sulfur recovery rate is improved, the gas is fully combusted, thereby avoiding the generation of carbon black, and further improving the quality of sulfur, the structure of the burner is changed little, the cost is low, the operation is simple, no additional heat exchange equipment is needed, and no larger land occupation is needed, the process conditions of the ammonia burning are met at the same time as the sulfur production process conditions are met, the ammonium salt crystallization blockage and the corrosion of the equipment are avoided, and the parking frequency is reduced.

[0096] Although the present application is disclosed as above, the present application is not limited to this. Any person skilled in the art can make various modifications and changes without departing from the spirit and scope of the present application, and the protection scope of the present application should be defined by the scope defined by the claims.

Claims

1. A postcombustion sulfur burner characterized by, The combustion device comprises a shell (7), a main gas gun (1), an acid gas gun (4), a combustion gas gun (2) and a main combustion air pipe (3), a wind guide tube (12) is arranged in the shell (7), a main fire channel (11) is arranged at the end of the wind guide tube (12), an ignition gun (6) is arranged on the main fire channel (11), a combustion air chamber is arranged in the wind guide tube (12), the acid gas gun (4) is arranged in the combustion air chamber, the main gas gun (1) is arranged in the acid gas gun (4), a combustion gas channel is arranged in the liner around the main fire channel (11), the combustion gas gun (2) and a combustion air gun (5) are arranged in the combustion gas channel, and the combustion gas gun (2) and the combustion air gun (5) are used for providing high-temperature flue gas into the main fire channel (11). A main gas pipe (104) is arranged on the shell (7), a main gas switch valve (103) is arranged between the main gas gun (1) and the main gas pipe (104), a main combustion air pipe (3) is arranged on the shell (7), a combustion gas pipe (204) is arranged between the main gas pipe (104) and the combustion gas gun (2), a combustion gas switch valve (206) is arranged on the combustion gas pipe (204), a combustion air pipe (503) is arranged between the main combustion air pipe (3) and the combustion air gun (5), and a combustion air switch valve (505) is arranged on the combustion air pipe (503). The control method of the combustion device comprises the following steps: S1, starting operation; S2, introducing gas into the main gas gun (1) and introducing combustion air into the main combustion air pipe (3); S3, judging whether the temperature in the main fire channel (11) is greater than 950 DEG C; if yes, entering step S4, if no, returning to step S2; S4, introducing acid gas into the acid gas gun (4); S5, judging whether the temperature in the main fire channel (11) is greater than 950 DEG C; if yes, keeping the status, if no, entering step S6; S6, stopping introducing gas into the main gas gun (1), opening the combustion gas gun (2) and the combustion air gun (5), and providing high-temperature flue gas into the main fire channel (11); In step S6, the main gas switch valve (103) is closed, the introduction of gas into the main gas gun (1) is stopped, the combustion gas switch valve (206) and the combustion air switch valve (505) are opened, the combustion gas gun (2) and the combustion air gun (5) are opened, the ratio of the combustion gas amount and the combustion air amount is greater than 1:10, and after the complete combustion of the two in the combustion gas channel, the hot flue gas is sprayed into the main fire channel (11) and mixed with the hot flue gas burned with the acid gas in the main fire channel (11).

2. A supplemental combustion sulfur burner as defined in claim 1, wherein The combustion gas channel comprises a first combustion gas channel (210) and a second combustion gas channel (510), the combustion gas gun (2) is arranged in the first combustion gas channel (210), and the combustion air gun (5) is arranged in the second combustion gas channel (510).

3. A supplemental sulfur burner as set forth in claim 1 wherein, A total gas inlet (101) is arranged on the main gas pipeline (104), and the supplementary combustion gas gun (2) communicates with the main gas pipeline (104).

4. A supplemental combustion sulfur burner as set forth in claim 2 wherein, A total air inlet (301) is arranged on the main combustion air pipeline (3), and the supplementary combustion air gun (5) communicates with the main combustion air pipeline (3).

5. A supplemental sulfur burner as set forth in claim 3 wherein, A supplementary combustion gas adjusting valve (203) and a supplementary combustion gas flowmeter (205) are arranged on the supplementary combustion gas pipeline (204).

6. A supplemental sulfur burner as set forth in claim 4 wherein, A supplementary combustion air adjusting valve (502) and a supplementary combustion air flowmeter (504) are arranged on the supplementary combustion air pipeline (503).

7. A supplemental sulfur burner as set forth in claim 5 wherein, A supplementary combustion gas nozzle (201) is arranged at the end of the supplementary combustion gas gun (2), and a first flame stabilizer (209) is arranged on the outer circumferential side of the supplementary combustion gas nozzle (201).

8. A supplemental sulfur burner as set forth in claim 6 wherein, A supplementary combustion air nozzle (508) is arranged at the end of the supplementary combustion air gun (5), and a second flame stabilizer (509) is arranged on the outer circumferential side of the supplementary combustion air nozzle (508).

9. A post-combustion sulphur burner according to claim 8, characterised in that A supplementary combustion annular gas collecting chamber (208) is arranged between the supplementary combustion gas pipeline (204) and the supplementary combustion gas gun (2), and a supplementary combustion air annular gas collecting chamber (507) is arranged between the supplementary combustion air pipeline (503) and the supplementary combustion air gun (5).

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