Coal tar hydrogenation device capable of efficiently utilizing acidic dry gas

Abstract

The utility model relates to the technical field of chemical engineering assistance, in particular to a coal tar hydrogenation device capable of efficiently utilizing acid dry gas, which comprises a hydrogenation reaction tank, a liquid inlet, a hydrogen inlet, an exhaust port and a temperature pressure gauge are sequentially assembled on the upper portion of the hydrogenation reaction tank, and a heating furnace is assembled outside the hydrogenation reaction tank. A combustion furnace is integrally arranged at the bottom of the heating furnace, an air supply port is formed in the left side of the combustion furnace, an air inlet pipe is assembled and connected to the left side of the air supply port, a drying tank is assembled on the left side of the heating furnace, and the upper end of the air inlet pipe is inserted into the drying tank; an air supply pipe is inserted into the left side of the drying tank, a desulfurization tank is arranged on the left side of the drying tank, and the upper end of the air supply pipe is connected to the right side of the upper end of the desulfurization tank. According to the device, the device can be conveniently heated from the outside according to use requirements, acidic dry gas is efficiently utilized during heating, combustion materials are conveniently provided, and the device is more efficient and convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical auxiliary technology, in particular to a coal tar hydrogenation device for efficiently utilizing acidic dry gas. Background Art

[0002] Coal tar hydrogenation refers to the use of hydrogenation and reforming technology on coal tar, that is, under certain temperature, pressure and catalyst, desulfurization, unsaturated hydrocarbon saturation, dehydrogenation reaction, and aromatic saturation can be completed to achieve the purpose of improving its stability, reducing sulfur content and aromatic content, and finally obtaining naphtha and high-quality fuel oil. During production in the chemical industry, each reactor fractionation tower is prone to produce acidic dry gas, and direct emission is likely to affect the environment. In addition, the acidic dry gas contains combustible methane, ethane, hydrogen, carbon monoxide and other gases. Therefore, the acidic dry gas can be efficiently used for combustion supply temperature, so as to provide the required temperature for the hydrogenation reaction device;

[0003] For reference, Chinese patent application number: CN201921501654.7 discloses a coal tar hydrogenation reactor, including a processing body and a liquid adding port, a control transmission seat is added to the top of the processing body, a transposition turntable is arranged in the middle seat body of the control transmission seat, the No. 1 temporary storage through hole and the No. 2 temporary storage through hole are arranged in a bilaterally symmetrical form, the top of the No. 1 temporary storage through hole is connected to the bottom of the liquid inlet channel, the bottom of the No. 2 temporary storage through hole is connected to the top of the liquid outlet channel, the driven rotating shaft is meshed with the active bevel gear, the active rotating shaft is driven to rotate by a power motor, the liquid inlet channel is connected to the liquid discharge port of the temporary storage box, and a liquid pump is arranged on the pipe body of the liquid extraction pipeline;

[0004] However, the existing hydrogenation reaction device is inconvenient to heat it externally according to the use needs, and it is inconvenient to efficiently utilize the acid dry gas, which affects the use efficiency and easily causes waste;

[0005] Therefore, in order to solve the above problems, a coal tar hydrogenation device for efficiently utilizing acidic dry gas is proposed. Summary of the invention

[0006] The purpose of the utility model is to provide a coal tar hydrogenation device for efficiently utilizing acidic dry gas, so as to solve the problem that the existing hydrogenation reaction device proposed in the above background technology is inconvenient to heat it externally according to the use needs, and is inconvenient to efficiently utilize the acidic dry gas, which affects the use efficiency and easily causes waste.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a coal tar hydrogenation device for efficiently utilizing acidic dry gas, comprising a hydrogenation reaction tank, wherein the upper part of the hydrogenation reaction tank is sequentially equipped with a liquid inlet, a hydrogen inlet, an exhaust port and a temperature and pressure gauge, the hydrogenation reaction tank is externally equipped with a heating furnace, and the heating furnace is wrapped around the lower middle part of the hydrogenation reaction tank, a combustion furnace is integrally arranged at the bottom of the heating furnace, an air supply port is arranged on the left side of the combustion furnace, an air supply port is arranged on the left side of the air supply port, an air intake pipe is arranged and connected to the left side of the air supply port, a drying tank is arranged on the left side of the heating furnace, and the upper end of the air intake pipe is inserted in the drying tank, an air supply pipe is inserted in the left side of the drying tank, a desulfurization tank is arranged on the left side of the drying tank, the upper end of the air supply pipe is connected to the right side of the upper end of the desulfurization tank, an exhaust gas inlet pipe is arranged on the left side of the desulfurization tank, the exhaust gas inlet pipe is inserted and assembled at the lower part of the air intake pipe, and the right side of the exhaust gas inlet pipe is assembled in the center of the desulfurization tank.

[0008] Preferably, a stirring rod is installed inside the hydrogenation reaction tank, the upper end of the stirring rod is inserted and installed on the top of the hydrogenation reaction tank, and the top of the hydrogenation reaction tank is equipped with an assembly top seat, the assembly top seat is sleeved on the upper end of the stirring rod, and the inside of the assembly top seat and the upper part of the stirring rod are supported by bearings, the top end of the stirring rod is connected to motor 1 through a coupling, and motor 1 is installed on the top of the assembly top seat, and the lower surface of the stirring rod is equipped with stirring paddles.

[0009] Preferably, a heating chamber is formed between the outer wall of the heating furnace and the inner wall of the hydrogenation reaction tank, and the upper side wall of the heating furnace is equipped with a gas-liquid inlet and outlet, the outer wall of the heating furnace is supported by a supporting rod and equipped with a surrounding frame, and a protective net is installed outside the surrounding frame, and the protective net surrounds the outside of the heating furnace.

[0010] Preferably, a combustion chamber is provided inside the combustion furnace, and a smoke exhaust port is provided on the right side of the combustion chamber, and the smoke exhaust port is fixed to the outer wall of the combustion furnace, and a check valve is provided between the side end of the air supply port and the air inlet pipe.

[0011] Preferably, the drying tank is equipped with a tank top cover on the top, and the upper end of the air inlet pipe and the right side of the air supply pipe are inserted through the inside of the tank top cover, and the air inlet pipe and the air supply pipe are sealed and fixed to the tank top cover through a sealing flange 1. An auxiliary inner shell is integrally provided inside the drying tank, and the interior of the drying tank is divided by the auxiliary inner shell into a liquid placement chamber located below and an air outlet chamber located above. The lower end of the right side of the air supply pipe is located at the bottom of the liquid placement chamber, and a check valve 2 is installed on the upper part of the air supply pipe, and the lower end of the left side of the air inlet pipe is located inside the air outlet chamber.

[0012] Preferably, a stirring frame is installed inside the desulfurization tank, and the lower support of the stirring frame is equipped with a support ring, and the support ring and the stirring frame cover are installed on the outside above the right end of the exhaust gas inlet pipe, the upper part of the stirring frame is equipped with a driving shaft, and the driving shaft is inserted through and installed on the top of the desulfurization tank, and the upper end of the driving shaft is connected and equipped with motor 2, the outer wall of the stirring frame is evenly equipped with stirring teeth, and a drain valve is installed in the center of the bottom of the desulfurization tank.

[0013] Preferably, the lower part of the exhaust gas inlet pipe is sealed and assembled with the lower part of the left side wall of the desulfurization tank through a sealing flange 2, the right outer wall of the exhaust gas inlet pipe is provided with an internal air outlet hole connected to the inside of the exhaust gas inlet pipe, the left side of the exhaust gas inlet pipe is supported and assembled by a supporting sleeve, the upper left part of the exhaust gas inlet pipe is connected to a waste gas inlet bin, and the waste gas inlet bin is fixed to the upper left part of the desulfurization tank, three groups of waste gas inlets are installed on the left side of the waste gas inlet bin, and a check valve 3 is installed in the middle of the waste gas inlet.

[0014] Compared with the prior art, the utility model has the following beneficial effects: the utility model is convenient for heating it externally according to the use needs, and by efficiently utilizing the acidic dry gas during heating, it is convenient to provide combustion materials, making the use more efficient and convenient;

[0015] The utility model is provided with a heating furnace, which is convenient for wrapping the outside of the hydrogenation reaction tank, so that after liquid is poured into the heating furnace, the liquid can continuously transfer heat to the hydrogenation reaction tank through heating, which is convenient for providing the temperature required for hydrogenation of the hydrogenation reaction tank, making it more convenient and efficient to use. At the same time, with the cooperation of the combustion furnace and the air supply port, it is convenient for acid dry gas to enter and combustion to provide heat. Through this design, the convenience and practicality of the coal tar hydrogenation device that efficiently utilizes acid dry gas are improved.

[0016] The utility model is provided with a drying tank and a desulfurization tank. After the acidic dry gas generated by the exhaust gas inlet pipe is passed into the desulfurization tank for desulfurization treatment, it is passed into the drying tank through the air supply pipe for drying. Subsequently, the air is supplied to the combustion furnace through the air inlet pipe in cooperation with the auxiliary inner shell, making subsequent operations more convenient and facilitating the efficient use of the acidic dry gas. Through this design, the convenience and practicality of the coal tar hydrogenation device for efficiently utilizing the acidic dry gas are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of a front cross-section of the structure of the utility model;

[0018] Figure 2 It is a schematic diagram of a top view cross section of the structure of the utility model;

[0019] Figure 3 For this utility model Figure 1 A schematic diagram of the structure enlargement in the middle;

[0020] Figure 4 For this utility model Figure 1 A magnified schematic diagram of the structure at B in the middle;

[0021] In the figure: 100, hydrogenation reaction tank; 110, liquid inlet; 120, hydrogen inlet; 130, exhaust port; 140, temperature and pressure gauge; 150, stirring rod; 151, assembly top seat; 152, bearing; 153, coupling; 154, motor 1; 155, stirring paddle; 200, heating furnace; 201, heating chamber; 202, gas and liquid inlet and outlet; 210, combustion furnace; 211, combustion chamber; 212, air delivery port; 213, smoke exhaust port; 220, surrounding frame; 221, support rod; 230, protective net; 300, air inlet pipe; 301, stop Check valve one; 310, drying tank; 311, tank top cover; 312, auxiliary inner shell; 313, liquid chamber; 314, air outlet chamber; 315, sealing flange one; 320, air supply pipe; 321, check valve two; 330, desulfurization tank; 331, stirring frame; 332, drive shaft; 333, motor two; 334, stirring teeth; 335, support ring; 336, drain valve; 340, exhaust gas inlet pipe; 341, inner air outlet; 342, support sleeve; 343, sealing flange two; 350, exhaust gas inlet; 360, exhaust gas inlet; 370, check valve three. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-4 , an embodiment provided by the utility model:

[0024] A coal tar hydrogenation device for efficiently utilizing acidic dry gas comprises a hydrogenation reaction tank 100, wherein the upper portion of the hydrogenation reaction tank 100 is sequentially provided with a liquid inlet 110, a hydrogen inlet 120, an exhaust port 130 and a temperature and pressure gauge 140, a heating furnace 200 is provided outside the hydrogenation reaction tank 100, and the heating furnace 200 is wrapped in the middle and lower portion of the hydrogenation reaction tank 100, a combustion furnace 210 is integrally provided at the bottom of the heating furnace 200, an air delivery port 212 is provided on the left side of the combustion furnace 210, and an air inlet 212 is provided on the left side of the air delivery port 212. The air pipe 300, a drying tank 310 is installed on the left side of the heating furnace 200, and the upper end of the air inlet pipe 300 is inserted into the drying tank 310, and an air supply pipe 320 is inserted into the left side of the drying tank 310, and a desulfurization tank 330 is arranged on the left side of the drying tank 310, and the upper end of the air supply pipe 320 is connected to the right side of the upper end of the desulfurization tank 330, and an exhaust gas inlet pipe 340 is arranged on the left side of the desulfurization tank 330, and the exhaust gas inlet pipe 340 is inserted and installed at the lower part of the air inlet pipe 300, and the right side of the exhaust gas inlet pipe 340 is installed in the center of the desulfurization tank 330;

[0025] Further, a stirring rod 150 is inserted and installed inside the hydrogenation reaction tank 100, and the upper end of the stirring rod 150 is inserted and installed on the top of the hydrogenation reaction tank 100, and the top of the hydrogenation reaction tank 100 is equipped with an assembly top seat 151, which is sleeved on the upper end of the stirring rod 150, and the inside of the assembly top seat 151 and the upper part of the stirring rod 150 are assembled and supported by a bearing 152, and the top of the stirring rod 150 is connected to a motor 154 through a coupling 153, and the motor 154 is assembled on the top of the assembly top seat 151, and the lower surface of the stirring rod 150 is equipped with a stirring paddle 155. Through this design, it is convenient to accelerate the stirring of the gas and liquid inside the hydrogenation reaction tank 100, so that the reaction is more convenient;

[0026] Furthermore, a heating chamber 201 is formed between the outer wall of the heating furnace 200 and the inner wall of the hydrogenation reaction tank 100, and a gas-liquid inlet and outlet 202 is installed on the upper side wall of the heating furnace 200. The outer wall of the heating furnace 200 is supported by a supporting rod 221 and equipped with a surrounding frame 220, and a protective net 230 is installed outside the surrounding frame 220, and the protective net 230 surrounds the outside of the heating furnace 200. This design facilitates the assembly and maintenance of the heating furnace 200.

[0027] Furthermore, a combustion chamber 211 is provided inside the combustion furnace 210, and a smoke exhaust port 213 is provided on the right side of the combustion chamber 211, and the smoke exhaust port 213 is fixed to the outer wall of the combustion furnace 210, and a check valve 301 is provided between the side end of the air supply port 212 and the air intake pipe 300. This design facilitates combustion assistance inside the combustion furnace 210, and check during air intake to prevent gas backflow;

[0028] Furthermore, a tank top cover 311 is installed on the top of the drying tank 310, and the upper end of the air inlet pipe 300 and the right side of the air supply pipe 320 are inserted through the tank top cover 311, and the air inlet pipe 300 and the air supply pipe 320 are sealed and fixed to the tank top cover 311 through a sealing flange 1 315. An auxiliary inner shell 312 is integrally provided inside the drying tank 310, and the interior of the drying tank 310 is divided into a liquid chamber 313 located below and an air outlet chamber 314 located above by the auxiliary inner shell 312. The lower right end of the air supply pipe 320 is located at the bottom of the liquid chamber 313, and a check valve 2 321 is installed on the upper part of the air supply pipe 320, and the lower left end of the air inlet pipe 300 is located inside the air outlet chamber 314. Through this design, it is convenient to protect the acidic dry gas during drying to avoid accidental back suction of the liquid;

[0029] Furthermore, a stirring frame 331 is installed inside the desulfurization tank 330, and a support ring 335 is installed on the lower support of the stirring frame 331, and the support ring 335 and the stirring frame 331 are mounted outside the upper right end of the exhaust gas inlet pipe 340, a driving shaft 332 is installed on the upper part of the stirring frame 331, and the driving shaft 332 is inserted through and installed on the top of the desulfurization tank 330, and a motor 2 333 is connected to the upper end of the driving shaft 332, and stirring teeth 334 are evenly installed on the outer wall of the stirring frame 331, and a drain valve 336 is installed at the center of the bottom of the desulfurization tank 330. Through this design, it is easy to stir the inside of the desulfurization tank 330, making the desulfurization mixing operation more convenient;

[0030] Furthermore, the lower part of the exhaust gas inlet pipe 340 is sealed and assembled with the lower part of the left side wall of the desulfurization tank 330 through a sealing flange 2 343, and the right outer wall of the exhaust gas inlet pipe 340 is provided with an inner air outlet 341 which is connected to the inside of the exhaust gas inlet pipe 340. The left side of the exhaust gas inlet pipe 340 is supported and assembled by a support sleeve 342. The upper left part of the exhaust gas inlet pipe 340 is connected to a exhaust gas inlet bin 350, and the exhaust gas inlet bin 350 is fixed to the upper left part of the desulfurization tank 330. Three groups of exhaust gas inlets 360 are installed on the left side of the exhaust gas inlet bin 350, and a check valve 3 370 is installed in the middle of the exhaust gas inlet 360. Through this design, it is convenient to assemble and connect multiple groups of acidic dry gases as needed.

[0031] Working principle: When assembled and used, according to the need for the entry of the acidic dry gas to be utilized, the exhaust gas inlet 360 and the check valve 3 370 are coordinated to facilitate the entry of the acidic dry gas, and then the exhaust gas inlet 350 is used to supply gas to the inside of the exhaust gas inlet pipe 340, and the exhaust gas inlet pipe 340 is discharged through the inner air outlet 341 on the right side. When degassing, a certain amount of desulfurization reagent is poured into the desulfurization tank 330 to overflow the inner air outlet 341, so that the gas can enter the desulfurization tank after passing through the liquid during gas infusion. The upper space of 330 is convenient for desulfurization of the gas. When it is used, the stirring frame 331 and the stirring teeth 334 are driven by the motor 2 333 to stir the inside of the gas, making the operation more convenient and efficient, and making the desulfurization more convenient. Then, with the cooperation of the air delivery pipe 320, the desulfurized acidic dry gas is passed into the drying tank 310, and relevant drying reagents such as concentrated sulfuric acid are poured into the drying tank 310 to facilitate the drying of the acidic dry gas. The air delivery pipe 320 is used to The gas is discharged from the right side, and after passing through the drying reagent, it emerges from the liquid surface and then enters the gas outlet chamber 314 upward, so that it can enter the combustion chamber 211 for combustion through the air inlet pipe 300 with the cooperation of the air supply port 212, so as to heat the liquid such as water inside the heating furnace 200, and to provide the required temperature inside the hydrogenation reaction tank 100, so that the coal tar, catalyst and hydrogen inside the hydrogenation reaction tank 100 can react quickly, so as to realize the hydrogenation operation of the coal tar. During the reaction, the stirring rod 150 and the stirring paddle 155 are driven by the motor 154 to accelerate the stirring inside. During the operation, the gas pressure is formed in the relatively closed space of the desulfurization tank 330 and the drying tank 310 through the continuous introduction of acidic dry gas, so that the gas can be guided to flow through the air supply pipe 320 and the air inlet pipe 300, so as to provide relevant air intake power. Of course, a relevant blower or booster pump can be installed between the air supply pipe 320 and the air inlet pipe 300 according to relevant use needs. The operation ends here.

[0032] It should be noted that the relevant desulfurization and drying reagents and hydrogenation reaction catalysts are well known to those skilled in the art, and there are a few types to choose from; the connection settings at various locations, as well as the settings of the inlet and outlet drainage and exhaust, can be assembled and opened with reference to the prior art, as long as they can achieve the functions in this application, so no specific limitations are made here;

[0033] The above description is only a preferred embodiment of the utility model and does not limit the utility model in any form. Any ordinary technician in the industry can smoothly implement the utility model as shown in the drawings of the specification and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the utility model using the technical content disclosed above are all equivalent embodiments of the utility model. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the utility model are still within the protection scope of the technical solution of the utility model.

Claims

1. A coal tar hydrogenation device for efficiently utilizing acidic dry gas, comprising a hydrogenation reaction tank (100), wherein the upper portion of the hydrogenation reaction tank (100) is sequentially equipped with a liquid inlet (110), a hydrogen inlet (120), an exhaust port (130) and a temperature and pressure gauge (140), characterized in that: The hydrogenation reaction tank (100) is provided with a heating furnace (200) on the outside, and the heating furnace (200) is wrapped in the lower middle part of the hydrogenation reaction tank (100). The bottom of the heating furnace (200) is integrally provided with a combustion furnace (210). The combustion furnace (210) is provided with an air supply port (212) on the left side, and an air intake pipe (300) is provided and connected to the air supply port (212) on the left side. A drying tank (310) is provided on the left side of the heating furnace (200), and the upper end of the air intake pipe (300) is inserted into the drying tank. Inside the drying tank (310), an air supply pipe (320) is inserted into the left side of the drying tank (310), a desulfurization tank (330) is arranged on the left side of the drying tank (310), the upper end of the air supply pipe (320) is connected to the right side of the upper end of the desulfurization tank (330), an exhaust gas inlet pipe (340) is arranged on the left side of the desulfurization tank (330), the exhaust gas inlet pipe (340) is inserted and installed in the lower part of the air inlet pipe (300), and the right side of the exhaust gas inlet pipe (340) is installed in the center of the desulfurization tank (330).

2. A coal tar hydrogenation device for efficiently utilizing acidic dry gas according to claim 1, characterized in that: A stirring rod (150) is inserted and installed inside the hydrogenation reaction tank (100), and the upper end of the stirring rod (150) is inserted and installed on the top of the hydrogenation reaction tank (100), and the top of the hydrogenation reaction tank (100) is equipped with an assembly top seat (151), the assembly top seat (151) is sleeved on the upper end of the stirring rod (150), and the inside of the assembly top seat (151) and the upper part of the stirring rod (150) are assembled and supported by bearings (152), the top end of the stirring rod (150) is connected to a motor 1 (154) through a coupling (153), and the motor 1 (154) is assembled on the top of the assembly top seat (151), and the lower surface of the stirring rod (150) is equipped with a stirring paddle (155).

3. The coal tar hydrogenation device for efficiently utilizing acidic dry gas according to claim 1, characterized in that: A heating chamber (201) is formed between the outer wall of the heating furnace (200) and the inner wall of the hydrogenation reaction tank (100), and the upper side wall of the heating furnace (200) is equipped with a gas-liquid inlet and outlet (202). The outer wall of the heating furnace (200) is supported by a supporting rod (221) and equipped with a surrounding frame (220), and the surrounding frame (220) is equipped with a protective net (230) outside, and the protective net (230) surrounds the outside of the heating furnace (200).

4. The coal tar hydrogenation device for efficiently utilizing acidic dry gas according to claim 1, characterized in that: A combustion chamber (211) is provided inside the combustion furnace (210), and a smoke exhaust port (213) is provided on the right side of the combustion chamber (211). The smoke exhaust port (213) is fixed to the outer wall of the combustion furnace (210), and a check valve (301) is provided between the side end of the air supply port (212) and the air inlet pipe (300).

5. The coal tar hydrogenation device for efficiently utilizing acidic dry gas according to claim 1, characterized in that: The drying tank (310) is provided with a tank top cover (311) at the top, and the upper end of the air inlet pipe (300) and the right side of the air supply pipe (320) are both inserted through the tank top cover (311), and the air inlet pipe (300) and the air supply pipe (320) are both sealed and fixed to the tank top cover (311) via a sealing flange 1 (315). The drying tank (310) is provided with an auxiliary inner shell (312) in an integrated manner, and the interior of the drying tank (310) is divided by the auxiliary inner shell (312) into a liquid placement chamber (313) located at the bottom and an air outlet chamber (314) located at the top. The lower end of the right side of the air supply pipe (320) is located at the bottom of the liquid placement chamber (313), and the upper part of the air supply pipe (320) is provided with a check valve 2 (321), and the lower end of the left side of the air inlet pipe (300) is located inside the air outlet chamber (314).

6. The coal tar hydrogenation device for efficiently utilizing acidic dry gas according to claim 1, characterized in that: The desulfurization tank (330) is equipped with a stirring frame (331) inside, and the lower support of the stirring frame (331) is equipped with a support ring (335), and the support ring (335) and the stirring frame (331) are mounted outside the upper right end of the exhaust gas inlet pipe (340), the upper part of the stirring frame (331) is equipped with a driving shaft (332), and the driving shaft (332) is inserted through and installed on the top of the desulfurization tank (330), and the upper end of the driving shaft (332) is connected and equipped with a second motor (333), the outer wall of the stirring frame (331) is evenly equipped with stirring teeth (334), and the bottom center of the desulfurization tank (330) is equipped with a drain valve (336).

7. The coal tar hydrogenation device for efficiently utilizing acidic dry gas according to claim 1, characterized in that: The lower portion of the exhaust gas inlet pipe (340) is sealed and assembled with the lower portion of the left side wall of the desulfurization tank (330) via a sealing flange 2 (343); the right side outer wall of the exhaust gas inlet pipe (340) is provided with an inner air outlet hole (341) which is in communication with the inside of the exhaust gas inlet pipe (340); the left side of the exhaust gas inlet pipe (340) is supported and assembled by a support sleeve (342); the upper portion of the left side of the exhaust gas inlet pipe (340) is connected with an exhaust gas inlet bin (350); the exhaust gas inlet bin (350) is fixed to the upper portion of the left side of the desulfurization tank (330); the left side of the exhaust gas inlet bin (350) is equipped with three groups of exhaust gas inlets (360); and the middle portion of the exhaust gas inlet (360) is equipped with a check valve 3 (370).

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