Purifying device and purifying and discharging method for sulfur dioxide waste gas in mine car tail gas

Abstract

The invention discloses a purification device and a purification and emission method for sulfur dioxide waste gas in mine car tail gas, relates to the technical field of removal or treatment of combustion products, and aims to solve the problems of low concentration, wide distribution and difficult treatment of sulfur dioxide in tail gas. According to the technical scheme, a sulfur combustion equipment main body is installed in the next step of operation of a tail gas treatment equipment main body, conversion equipment is arranged in the next step of the sulfur combustion equipment main body, and the conversion equipment is connected with a sulfonation equipment main body pipeline through a fourth connection conveying pipeline; the auxiliary material adding pipeline is installed on the rear end face of the sulfur combustion equipment body and fixedly connected with the sulfur combustion equipment body, and the sulfur combustion equipment body is connected with a tail gas treatment equipment body pipeline through a gas circulation conveying pipeline.

Description

Technical Field

[0001] The invention relates to the technical field of removal or treatment of combustion products, in particular to a purification device and a purification and emission method for sulfur dioxide waste gas in tail gas of a mine car. Background Art

[0002] There are two types of mine cars: rail mine cars and mine car transport vehicles. Since the exhaust pollutants of the mine car when in use contain sulfur dioxide waste gas, direct discharge of sulfur dioxide waste gas will seriously pollute the environment. In order to meet environmental emission requirements, it must be treated before discharge.

[0003] For example, a Chinese patent with authorization announcement number CN211734228U discloses a gas-phase SO3 sulfonation tail gas recycling production system, including: a Roots blower, a sulfur-burning furnace, a SO2 conversion tower, a SO3 cooler, a SO3 filter, a sulfonator, a gas-liquid separator and an electrostatic precipitator connected in sequence by pipelines, and the liquid phase outlet of the gas-liquid separator is connected to a subsequent processing system; the suction end of the Roots blower is connected to the gas phase outlet of the electrostatic precipitator through a pipeline, and the outlet end is connected to the gas phase inlet of the sulfur-burning furnace through a pipeline; an oxygen inlet is also provided on the suction end pipeline of the Roots blower.

[0004] For example, a Chinese patent with the authorization announcement number CN209161488U discloses a system for reducing waste sulfuric acid with sulfur gas to produce liquid sulfur dioxide and sulfuric acid, including: a gasifier, a reduction furnace, a gasification cracking furnace, a combustion furnace, a waste heat boiler, a dust removal and purification unit, and a two-turn two-absorption system, wherein the gasifier and the gasification cracking furnace are connected in parallel to the reduction furnace, and the reduction furnace is sequentially connected to the combustion furnace, the waste heat boiler, the dust removal and purification unit and the two-turn two-absorption system, and the dust removal and purification unit is connected to the gasification cracking furnace. Compared with the prior art, this system uses a lower temperature to purify and concentrate waste sulfuric acid for recycling and resource utilization to produce high-quality liquid sulfur dioxide and concentrated sulfuric acid products, and at the same time, the organic matter, salt and other impurities therein are properly treated harmlessly, and no secondary pollutants are generated, so as to achieve resource recycling and environmental friendliness.

[0005] The existing purification technology has high cost for treating sulfur dioxide waste gas in tail gas, low desulfurization efficiency and easy to produce secondary pollution. Therefore, the present invention provides a purification device and a purification and emission method for sulfur dioxide waste gas in mine car tail gas. Summary of the invention

[0006] The purpose of the present invention is to provide a purification device and a purification and emission method for sulfur dioxide waste gas in the tail gas of a mine car, so as to solve the problems of low concentration, wide distribution and difficult treatment proposed in the above background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a device for purifying sulfur dioxide waste gas in tail gas of a mine car, comprising a sulfonation equipment body, a gas-liquid separation equipment body and a tail gas treatment equipment body;

[0008] Also includes:

[0009] A sulfur combustion equipment body, which is installed in the next step of the tail gas treatment equipment body, and the next step of the sulfur combustion equipment body is provided with a conversion device, and the conversion device is connected to the sulfonation equipment body pipeline through a fourth connecting delivery pipeline;

[0010] An auxiliary material adding pipeline is installed on the rear end face of the main body of the sulfur combustion equipment, and the auxiliary material adding pipeline is fixedly connected to the main body of the sulfur combustion equipment, and the main body of the sulfur combustion equipment is connected to the main pipeline of the tail gas treatment equipment through a gas circulation conveying pipeline;

[0011] The tail gas emission output pipe is installed on one side of the upper end surface of the tail gas treatment device body. The front end surface of the tail gas treatment device body is provided with a door panel, and two door panels are provided. Both of the door panels are rotatably connected to the tail gas treatment device body.

[0012] Preferably, a third observation window is provided on the outer wall of the front end face of the conversion device, and the third observation window is embedded in the outer wall of the conversion device, a second control and adjustment mechanism is provided on the front end face of the conversion device, and the conversion device is connected to the main pipe of the sulfur combustion equipment through a third connecting conveying pipe.

[0013] Preferably, a baffle is provided on the upper end face of the sulfur combustion equipment body, and the baffle is threadably connected to the sulfur combustion equipment body through a hexagonal bolt, and a plurality of hexagonal bolts are provided. A second observation window is provided on the front end face of the sulfur combustion equipment body, and the second observation window is embedded and fixedly connected to the sulfur combustion equipment body.

[0014] Preferably, a display screen is provided above the front end surface of the exhaust gas treatment device body, and the display screen is electrically connected to the exhaust gas treatment device body, an inspection plate is provided at one end of the exhaust gas treatment device body, and the inspection plate is threadedly connected to the exhaust gas treatment device body, a heat dissipation reserved groove is provided inside the inspection plate, and a plurality of heat dissipation reserved grooves are provided, and the plurality of heat dissipation reserved grooves are integrally formed with the inspection plate.

[0015] Preferably, the main body of the gas-liquid separation equipment is connected to the main pipe of the exhaust gas treatment equipment through a second connecting conveying pipe, the outer wall of the front end face of the main body of the gas-liquid separation equipment is provided with a first observation window, the lower end face of the main body of the gas-liquid separation equipment is provided with a liquid output pipe, and the outer ring of the lower end of the main body of the gas-liquid separation equipment is provided with a second column base rod, and four second column base rods are provided, and the four second column base rods are fixedly connected to the main body of the gas-liquid separation equipment.

[0016] Preferably, the gas-liquid separation equipment body is connected to the sulfonation equipment body pipeline via a first connecting delivery pipeline.

[0017] Preferably, an upper cover is provided on the upper end surface of the sulfonation equipment body, a feed input pipe is provided on one side of the upper end surface of the upper cover, and one end of the feed input pipe is fixedly connected to the upper cover, a first control and adjustment mechanism is provided on the front end surface of the sulfonation equipment body, a first column foot rod is provided on the lower end surface of the sulfonation equipment body, and four first column foot rods are provided, and the four first column foot rods are all fixedly connected to the sulfonation equipment body.

[0018] A method for purifying and discharging sulfur dioxide waste gas in tail gas of a mine car comprises the following steps:

[0019] Step 1: The organic raw material enters the main body of the sulfonation equipment through the feed input pipeline, and the main body of the sulfonation equipment is controlled and operated by the first control and adjustment mechanism. The reacted material is transported to the main body of the gas-liquid separation equipment.

[0020] Step 2: After the material is reacted inside the main body of the gas-liquid separation equipment, the gas and liquid are respectively transported out from the second connecting delivery pipeline and the liquid output pipeline, the liquid output pipeline will produce discharge, and the generated waste gas enters the main body of the tail gas treatment equipment through the second connecting delivery pipeline;

[0021] Step 3: When the equipment of the tail gas treatment equipment is operating the tail gas, only 5% of the tail gas is discharged through the tail gas emission output pipeline, and the remaining 95% of the tail gas enters the main body of the sulfur combustion equipment through the gas circulation transmission pipeline, and then the oxygen and sulfur added in the auxiliary material addition pipeline are reacted with the sulfur dioxide in the tail gas, and then transported to the conversion equipment to convert the sulfur dioxide into sulfur trioxide;

[0022] Step 4: Finally, the converted sulfur trioxide is transported back into the main body of the sulfonation equipment for a cyclic operation reaction.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The present invention separates tail gas through gas-liquid separation equipment, discharges the tail gas into the main body of the sulfur combustion equipment, generates sulfur dioxide gas and heat through the combustion reaction of sulfur and oxygen, provides redox conditions for the oxidation reaction of sulfur dioxide, oxidizes sulfur dioxide into sulfur trioxide, discharges the sulfur trioxide gas into a material furnace for reaction, and then circulates through the gas-liquid separation equipment for treatment, so that no secondary pollution is generated during the sulfur dioxide treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the device for purifying sulfur dioxide waste gas in the tail gas of a mine car according to the present invention;

[0026] Figure 2 It is a flow chart of the method for purifying and discharging sulfur dioxide waste gas in the tail gas of a mine car according to the present invention;

[0027] In the figure: 100, sulfonation equipment body; 101, feed input pipeline; 102, first control and adjustment mechanism; 103, first column foot rod; 104, upper cover; 105, first connecting conveying pipeline; 200, gas-liquid separation equipment body; 201, first observation window; 202, second column foot rod; 203, liquid output pipeline; 204, second connecting conveying pipeline; 300, tail gas treatment equipment body; 301, door panel; 302, repair panel; 303, heat dissipation reserved slot; 304, display screen; 305, tail gas emission output pipeline; 306, gas circulation conveying pipeline; 400, sulfur combustion equipment body; 401, auxiliary material adding pipeline; 402, shielding plate; 403, hexagonal bolt; 404, second observation window; 405, third connecting conveying pipeline; 500, conversion equipment; 501, third observation window; 502, second control and adjustment mechanism; 503, fourth connecting conveying pipeline. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] Example 1

[0030] See also Figure 1-2 , an embodiment provided by the present invention: a purification device for sulfur dioxide waste gas in tail gas of a mine car, comprising a sulfonation equipment body 100, a gas-liquid separation equipment body 200 and a tail gas treatment equipment body 300;

[0031] Also includes:

[0032] The sulfur combustion equipment body 400 is installed in the next step of the tail gas treatment equipment body 300. The sulfur combustion equipment body 400 is provided with a conversion device 500 in the next step. The conversion device 500 is connected to the sulfonation equipment body 100 through a fourth connecting delivery pipeline 503;

[0033] Auxiliary material adding pipeline 401 is installed on the rear end face of the sulfur combustion equipment body 400, and the auxiliary material adding pipeline 401 is fixedly connected to the sulfur combustion equipment body 400, and the sulfur combustion equipment body 400 is connected to the tail gas treatment equipment body 300 through the gas circulation delivery pipeline 306;

[0034] The exhaust gas emission output pipe 305 is installed on one side of the upper end surface of the exhaust gas treatment device body 300. The front end surface of the exhaust gas treatment device body 300 is provided with a door panel 301, and two door panels 301 are provided. Both door panels 301 are rotatably connected to the exhaust gas treatment device body 300.

[0035] The organic raw material enters the sulfonation equipment body 100 through the feed input pipeline 101, and the sulfonation equipment body 100 is controlled and operated by the first control and regulation mechanism 102. The reacted material is transported to the gas-liquid separation equipment body 200. After the material is reacted inside the gas-liquid separation equipment body 200, the gas and liquid are transported out from the second connecting transport pipeline 204 and the liquid output pipeline 203 respectively. The liquid output pipeline 203 will produce exhaust gas, and the generated waste gas enters the tail gas treatment equipment body 300 through the second connecting transport pipeline 204. When the equipment of the gas treatment equipment body 300 operates on the exhaust gas, only 5% of the exhaust gas is discharged through the exhaust gas emission output pipe 305, and the remaining 95% of the exhaust gas enters the sulfur combustion equipment body 400 through the gas circulation conveying pipe 306, and then through the oxygen and sulfur added in the auxiliary material adding pipe 401, it reacts with the sulfur dioxide in the exhaust gas, and is transported to the conversion equipment 500 to convert the sulfur dioxide into sulfur trioxide. Finally, the converted sulfur trioxide is transported again into the sulfonation equipment body 100 for a circulation operation reaction.

[0036] Example 2

[0037] Based on Example 1, the outer wall of the front end face of the conversion device 500 of the present invention is provided with a third observation window 501, and the third observation window 501 is embedded in the outer wall of the conversion device 500, and the front end face of the conversion device 500 is provided with a second control and adjustment mechanism 502, and the conversion device 500 is connected to the sulfur combustion equipment body 400 through a third connecting conveying pipeline 405.

[0038] Furthermore, a baffle plate 402 is provided on the upper end surface of the sulfur combustion equipment body 400, and the baffle plate 402 is threadedly rotatably connected to the sulfur combustion equipment body 400 through a hexagonal bolt 403, and a plurality of hexagonal bolts 403 are provided. A second observation window 404 is provided on the front end surface of the sulfur combustion equipment body 400, and the second observation window 404 is embedded and fixedly connected to the sulfur combustion equipment body 400.

[0039] Furthermore, a display screen 304 is provided above the front end surface of the exhaust gas treatment device body 300, and the display screen 304 is electrically connected to the exhaust gas treatment device body 300, an inspection plate 302 is provided at one end of the exhaust gas treatment device body 300, and the inspection plate 302 is threadedly connected to the exhaust gas treatment device body 300, a heat dissipation reserved groove 303 is provided inside the inspection plate 302, and a plurality of heat dissipation reserved grooves 303 are provided, and the plurality of heat dissipation reserved grooves 303 are integrally formed with the inspection plate 302.

[0040] Furthermore, the gas-liquid separation equipment body 200 is connected to the exhaust gas treatment equipment body 300 through a second connecting conveying pipeline 204, a first observation window 201 is provided on the outer wall of the front end face of the gas-liquid separation equipment body 200, a liquid output pipeline 203 is provided on the lower end face of the gas-liquid separation equipment body 200, a second column base rod 202 is provided on the outer ring of the lower end of the gas-liquid separation equipment body 200, and four second column base rods 202 are provided, and the four second column base rods 202 are fixedly connected to the gas-liquid separation equipment body 200.

[0041] Furthermore, the gas-liquid separation equipment body 200 is connected to the sulfonation equipment body 100 through a first connecting delivery pipeline 105 .

[0042] Furthermore, an upper cover 104 is provided on the upper end surface of the sulfonation equipment body 100, a feed input pipe 101 is provided on one side of the upper end surface of the upper cover 104, and one end of the feed input pipe 101 is fixedly connected to the upper cover 104, a first control and adjustment mechanism 102 is provided on the front end surface of the sulfonation equipment body 100, a first column foot rod 103 is provided on the lower end surface of the sulfonation equipment body 100, and four first column foot rods 103 are provided, and the four first column foot rods 103 are all fixedly connected to the sulfonation equipment body 100.

[0043] Example 3

[0044] This embodiment provides a method for purifying and discharging sulfur dioxide waste gas in the tail gas of a mine car, which is implemented based on the purification device for sulfur dioxide waste gas in the tail gas of a mine car in Example 2, and includes the following steps:

[0045] Step 1: The organic raw material enters the sulfonation equipment body 100 through the feed input pipeline 101, and the sulfonation equipment body 100 is controlled and operated by the first control and adjustment mechanism 102, and the reacted material is transported to the gas-liquid separation equipment body 200;

[0046] Step 2: After the material is reacted inside the gas-liquid separation equipment body 200, the gas and liquid are respectively transported out from the second connecting delivery pipeline 204 and the liquid output pipeline 203, and the liquid output pipeline 203 will produce discharge, while the generated waste gas enters the tail gas treatment equipment body 300 through the second connecting delivery pipeline 204;

[0047] Step 3: When the tail gas treatment equipment body 300 operates the tail gas, only 5% of the tail gas is discharged through the tail gas discharge output pipeline 305, and the remaining 95% of the tail gas enters the sulfur combustion equipment body 400 through the gas circulation delivery pipeline 306, and then the oxygen and sulfur added in the auxiliary material adding pipeline 401 react with the sulfur dioxide in the tail gas, and are transported to the conversion equipment 500 to convert the sulfur dioxide into sulfur trioxide;

[0048] Step 4: Finally, the converted sulfur trioxide is transported back into the sulfonation equipment body 100 for a cyclic operation reaction.

[0049] Among them, the method for purifying and emitting sulfur dioxide waste gas in the tail gas of a mine car includes an emission control strategy, and the emission control strategy includes the following specific steps:

[0050] S101: Collect the tail gas containing sulfur dioxide discharged from the pipeline, and use the sulfur dioxide detector to detect the concentration of sulfur dioxide in the tail gas C n ;

[0051] S102: Under normal temperature and pressure, the volume of tail gas entering the main body of the sulfur combustion equipment through the gas circulation pipeline is set to V fq ;

[0052] S103: Set the optimal temperature of the redox reaction of sulfur dioxide and oxygen to T, and the temperature of adding oxygen to The mass of sulfur added is m s , the calculation formula is:

[0053]

[0054] Where C is the specific heat of air, is the specific heat of oxygen, m kq is the mass of the air inside the main body of the sulfur combustion equipment, t1 is the room temperature, K is the heat released when 1 kg of sulfur is completely burned, and the mass is m s The mass of oxygen required for the complete combustion of sulfur is m s , the mass of sulfur dioxide produced is 2m s , the mass of oxygen added m o for Control the added sulfur mass to be m s and the mass of oxygen is m o When , the temperature can be raised from room temperature to the optimal temperature T;

[0055] S104: Set the sulfur dioxide flow rate through the fourth connecting delivery pipeline to v4 and the oxygen flow rate to The radius of the fourth connecting pipeline is r, at t ato b At the moment, the volume of sulfur dioxide in the fourth connecting pipeline is πr 2 v4(t b -t a ) and the volume of oxygen is Calculated at t a to b The heat Q taken away by sulfur dioxide and oxygen discharged from the sulfur combustion equipment at any time s , the calculation formula is:

[0056]

[0057] in, is the specific heat of sulfur dioxide, is the specific heat of oxygen, calculated at t a to b At this moment, the rate v of sulfur addition required to maintain temperature T is j 、Mass m j and the rate of oxygen v oj 、Mass m oj , the calculation formula is:

[0058]

[0059] After the temperature is controlled to rise to the optimal temperature T, the input rate of sulfur and oxygen is v j and v oj When the temperature is kept at the optimum temperature T.

[0060] The present invention proposes an emission control strategy, which controls the amount of oxygen input so that sulfur can be completely burned, raises the temperature to the optimal temperature for sulfur dioxide oxidation, and controls the rates at which sulfur and oxygen are added so that the optimal temperature for sulfur dioxide oxidation is maintained inside the main body of the sulfur combustion equipment. At the same time, sulfur dioxide is generated to increase the sulfur dioxide concentration in the equipment, thereby improving the treatment effect and conversion efficiency when the sulfur dioxide concentration is low.

[0061] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A device for purifying sulfur dioxide waste gas in tail gas of a mine car, comprising a sulfonation equipment body (100), a gas-liquid separation equipment body (200) and a tail gas treatment equipment body (300); It is characterized in that Also includes: A sulfur combustion equipment body (400) is installed in the next step of the tail gas treatment equipment body (300), and a conversion device (500) is provided in the next step of the sulfur combustion equipment body (400), and the conversion device (500) is connected to the sulfonation equipment body (100) through a fourth connecting delivery pipeline (503); An auxiliary material adding pipeline (401) is installed on the rear end face of the sulfur combustion equipment body (400), and the auxiliary material adding pipeline (401) is fixedly connected to the sulfur combustion equipment body (400), and the sulfur combustion equipment body (400) is connected to the tail gas treatment equipment body (300) through a gas circulation delivery pipeline (306); An exhaust gas emission output pipe (305) is installed on one side of the upper end surface of the exhaust gas treatment device body (300). The front end surface of the exhaust gas treatment device body (300) is provided with a door panel (301), and two door panels (301) are provided. Both of the door panels (301) are rotatably connected to the exhaust gas treatment device body (300).

2. The device for purifying sulfur dioxide waste gas in the tail gas of a mine car according to claim 1, characterized in that: The outer wall of the front end face of the conversion device (500) is provided with a third observation window (501), and the third observation window (501) is embeddedly connected to the outer wall of the conversion device (500). The front end face of the conversion device (500) is provided with a second control and adjustment mechanism (502). The conversion device (500) is connected to the sulfur combustion device body (400) pipeline via a third connecting and conveying pipeline (405).

3. The device for purifying sulfur dioxide waste gas in the tail gas of a mine car according to claim 2, characterized in that: The upper end surface of the sulfur combustion equipment body (400) is provided with a shielding plate (402), and the shielding plate (402) is threadedly rotatably connected to the sulfur combustion equipment body (400) through a hexagonal bolt (403). The front end surface of the sulfur combustion equipment body (400) is provided with a second observation window (404), and the second observation window (404) is embedded and fixedly connected to the sulfur combustion equipment body (400).

4. The device for purifying sulfur dioxide waste gas in the tail gas of a mine car according to claim 3, characterized in that: A display screen (304) is provided above the front end surface of the exhaust gas treatment device body (300), and the display screen (304) is electrically connected to the exhaust gas treatment device body (300). An inspection plate (302) is provided at one end of the exhaust gas treatment device body (300), and the inspection plate (302) is threadedly connected to the exhaust gas treatment device body (300). A heat dissipation reserved groove (303) is provided inside the inspection plate (302), and the heat dissipation reserved groove (303) is formed integrally with the inspection plate (302).

5. The device for purifying sulfur dioxide waste gas in the tail gas of a mine car according to claim 4, characterized in that: The gas-liquid separation equipment body (200) is connected to the tail gas treatment equipment body (300) through a second connecting delivery pipeline (204); the outer wall of the front end surface of the gas-liquid separation equipment body (200) is provided with a first observation window (201); the lower end surface of the gas-liquid separation equipment body (200) is provided with a liquid output pipeline (203); the outer ring of the lower end of the gas-liquid separation equipment body (200) is provided with a second column foot rod (202), and four second column foot rods (202) are provided, and the four second column foot rods (202) are fixedly connected to the gas-liquid separation equipment body (200).

6. The device for purifying sulfur dioxide waste gas in the tail gas of a mine car according to claim 5, characterized in that: The gas-liquid separation equipment body (200) is connected to the sulfonation equipment body (100) through a first connecting delivery pipeline (105).

7. The device for purifying sulfur dioxide waste gas in the tail gas of a mine car according to claim 6, characterized in that: The upper end surface of the sulfonation equipment body (100) is provided with an upper cover (104), one side of the upper end surface of the upper cover (104) is provided with a feed input pipeline (101), and one end of the feed input pipeline (101) is fixedly connected to the upper cover (104), the front end surface of the sulfonation equipment body (100) is provided with a first control and adjustment mechanism (102), the lower end surface of the sulfonation equipment body (100) is provided with a first column foot rod (103), and there are four first column foot rods (103), and the four first column foot rods (103) are all fixedly connected to the sulfonation equipment body (100).

8. A method for purifying and discharging sulfur dioxide waste gas in the tail gas of a mine car, which is realized based on the device for purifying sulfur dioxide waste gas in the tail gas of a mine car according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: The organic raw material enters the sulfonation equipment body (100) through the feed input pipeline (101), and the sulfonation equipment body (100) is controlled and operated by the first control and adjustment mechanism (102), and the reacted material is transported to the gas-liquid separation equipment body (200); Step 2: After the material is reacted inside the gas-liquid separation device body (200), the gas and liquid are respectively transported out from the second connecting delivery pipeline (204) and the liquid output pipeline (203), and the liquid output pipeline (203) produces exhaust gas, while the generated exhaust gas enters the tail gas treatment device body (300) through the second connecting delivery pipeline (204); Step 3: When the tail gas treatment equipment body (300) operates the tail gas, only 5% of the tail gas is discharged through the tail gas discharge output pipe (305), and the remaining 95% of the tail gas enters the sulfur combustion equipment body (400) through the gas circulation delivery pipe (306), and then the oxygen and sulfur added in the auxiliary material addition pipe (401) react with the sulfur dioxide in the tail gas, and are transported to the conversion equipment (500) to convert the sulfur dioxide into sulfur trioxide; Step 4: Finally, the converted sulfur trioxide is transported back into the sulfonation equipment body (100) for a cyclic operation reaction.

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