CN214635368U - Hydrogen-containing tail gas treatment device - Google Patents

Abstract

The utility model relates to the technical field of chemical machinery, in particular to a hydrogen-containing tail gas treatment device, which comprises an epoxy propane tail gas pipe, an aniline tail gas pipe, a high-chlorine water-sealed tank, a high-chlorine buffer tank, a gas transfer pipe, an anti-backfire device, a hydrogen burner and a natural gas combustion furnace, wherein the inlet of the high-chlorine water-sealed tank is connected with the aniline tail gas pipe, the outlet of the high-chlorine water-sealed tank is connected with the gas transfer pipe to form an aniline tail gas primary treatment structure, the high-chlorine buffer tank is provided with two inlets which are respectively connected with the gas transfer pipe and the epoxy propane tail gas pipe to form a secondary tail gas hydrogen treatment structure, the outlet of the high-chlorine buffer tank is connected with the anti-backfire device, the outlet of the anti-backfire device is provided with two branch lines and one branch line is connected with the hydrogen burner, the other branch line of the anti-backfire device is connected with the natural gas combustion furnace, and the hydrogen burner is matched with a gas turbine to fully utilize tail gas, the anti-backfire device can effectively prevent backfire and improve safety.

Description

Hydrogen-containing tail gas treatment device

Technical Field

The utility model relates to a chemical machinery technical field, concretely relates to hydrogen-containing tail gas processing apparatus.

Background

Can produce hydrogenous tail gas in my chemical plant's production process constantly, this kind of tail gas is difficult to be got rid of through modes such as simple washing and dissolving, if directly vent into the air can cause serious air pollution and also wasted the resource that can retrieve, retrieve through the processing to the tail gas and can generate various industrial raw materials, can drive power generation such as gas turbine through the heat energy that the burning produced moreover.

Hydrogen-containing inflammable tail gas processing apparatus of industry electrolysis as that application number is 200620051891.4 discloses, including the big dizzy air exhauster of low pressure that flows, liquid distributor and by the filler, the major diameter filler treatment tower that washer pump and solution tank are constituteed, interlocking control switch has been set up, the single air exhauster of low pressure big flow, liquid distributor installs the top at major diameter filler treatment tower, carry out tail gas treatment through washer pump solution tank etc. nevertheless my company's tail gas composition is different, hydrogen is difficult for separating through this kind of mode, so need design special device and carry out the tail gas treatment operation.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a hydrogen-containing tail gas treatment device aiming at the defects existing in the prior art.

The technical scheme of the utility model is that:

the hydrogen-containing tail gas treatment device comprises a propylene oxide tail gas pipe, an aniline tail gas pipe, a high-chlorine water seal tank, a high-chlorine buffer tank, a gas transfer pipe, an anti-backfire device, a hydrogen burner and a natural gas combustion furnace, wherein an inlet of the high-chlorine water seal tank is connected with the aniline tail gas pipe, an outlet of the high-chlorine water seal tank is connected with the gas transfer pipe to form an aniline tail gas primary treatment structure, the high-chlorine buffer tank is provided with two inlets and is respectively connected with the gas transfer pipe and the propylene oxide tail gas pipe to form a secondary tail gas hydrogen treatment structure, an outlet of the high-chlorine buffer tank is connected with the anti-backfire device, an outlet of the anti-backfire device is provided with two branch lines, one branch line of the two branch lines is connected with the hydrogen burner, and the other branch line of the anti-backfire device is connected with the natural gas combustion furnace;

the anti-backfire device comprises an outer cover, a movable assembly and a backfire decelerating ring, wherein the front end and the rear end of the outer cover are respectively provided with a tail gas inlet and a tail gas outlet;

the tempering speed reducing ring is of a hollow annular structure, a tempering speed reducing cavity is arranged in the tempering speed reducing ring, the tempering speed reducing cavity is of a heart-shaped cavity structure which is axially directed from the front end to the rear end and is through from front to back, and a plurality of tempering speed reducing rings are connected through threads to form a tempering speed reducing pipe;

the movable assembly is coaxially arranged in the outer cover, a bowl-shaped packing part is arranged at the rear end of the movable assembly, the packing part extends out of the outer cover and forms a tempering packing structure with a tail gas outlet at the rear end of the outer cover, outer cover rear threads are arranged at the rear end of the outer cover, and the tempering speed reducing ring at the foremost end is in threaded connection with the outer cover rear threads.

Preferably, the movable assembly includes the movable rod of coaxial setting, seals up stopper, spring, fixed knot structure, seals up piece and movable tube, fixed knot structure with dustcoat fixed connection, fixed knot structure, movable tube and movable rod form from outside to inside slip the cover in proper order and establish the structure, fixed knot structure's front portion with movable tube sliding connection and rear end are provided with the fretwork hole, the movable rod passes fixed knot structure's fretwork hole and with movable tube sliding connection, the front end of movable tube with shutoff stopper fixed connection, the spring housing is located the outer just front end of movable rod with fixed knot structure fixed connection, the movable rod front end with seal up the stopper rear end and touch and be connected, seal up piece, spring, movable rod and shutoff stopper transmission cooperation and with the tail gas entry forms second grade and seals up the piece structure.

Preferably, the rear portion of the movable rod is fixedly provided with a front clamping ring and the rear portion is fixedly provided with a rear clamping ring, a gap is reserved between the front clamping ring and the rear clamping ring, and the partition body is slidably sleeved on the rear portion of the movable rod to form a buffer structure between the front clamping ring and the rear clamping ring.

Preferably, the fixing structure comprises fixing legs and a limiting tube, the limiting tube is a hollow tube structure with a hole sealing cover arranged at the bottom, the fixing legs are in a circumferential array by taking the central axis of the limiting tube as an axis, the inner ends of the fixing legs are fixedly connected with the limiting tube, the other ends of the fixing legs are fixedly connected with the outer cover, and the limiting tube is in sliding connection with the movable tube;

the rear end of the movable pipe and the limiting pipe form a powder containing cavity, compound powder which is decomposed into gas when the compound powder is heated is filled in the powder containing cavity, and the powder containing cavity, the movable pipe, the sealing plug and the tail gas inlet are matched to form an expansion gas sealing plug structure.

Preferably, the hydrogen combustor comprises a hydrogen inlet pipe, a combustion chamber, an oxygen inlet pipe and an exhaust pipe, the front end of the combustion chamber is fixedly connected with the hydrogen inlet pipe, the exhaust pipe is arranged at the rear end of the combustion chamber, a feeding gas ring is arranged on the side surface of the combustion chamber, the outer part of the feeding gas ring is communicated with the oxygen inlet pipe, a gas injection gap is arranged on the feeding gas ring and is communicated with the inner part of the combustion chamber to form an oxygen jet flow port, and the oxygen jet flow port is tangential to the inner surface of the combustion chamber;

the rear end of the combustion chamber is also provided with a spherical secondary combustion chamber, the feeding gas ring is arranged at the joint of the combustion chamber and the secondary combustion chamber, and the exhaust pipe is communicated with the secondary combustion chamber.

Preferably, a flow limiting rod is arranged in the hydrogen inlet pipe, a flow limiting convex block in a biconical shape is arranged at the top end of the flow limiting rod, a front conical surface of the flow limiting convex block is matched with the inner surface of the combustion chamber to form a hydrogen jet flow port, and a rear conical surface of the flow limiting convex block is matched with the combustion chamber to form an annular combustion cavity.

Compared with the prior art, the utility model, have following advantage:

the production hydrogenous waste gas is handled and is absorbed the collection to the solid and the liquid impurity in the tail gas through high chlorine water seal tank and chlorine buffer tank, then get into the hydrogen combustor through anti-backfire device, anti-backfire device can guarantee that equipment can not be ignited by the tempering and detonate, increase the security of equipment, can the hydrogen waste material that contains in the effectual processing tail gas through increasing the hydrogen combustor, avoid the waste material to arrange the environmental problem that leads to outward, simultaneously with other gas turbine cooperation usable waste material electricity generation, this equipment can produce apparent economic benefits and environmental protection benefit through comprehensive treatment.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a half-section structure of the anti-backfire device;

FIG. 3 is a schematic diagram of a half-section structure of a hydrogen burner;

in the figure: the system comprises an A-epoxypropane tail gas pipe, a B-aniline tail gas pipe, a C-high-chlorine water seal tank, a D-high-chlorine buffer tank, an E-transition gas pipe, an F-anti-backfire device, a G-hydrogen combustor and an H-natural gas combustion furnace;

1-outer cover, 11-tail gas inlet, 12-tail gas outlet, 13-outer cover rear thread, 2-tempering speed reducing ring, 21-tempering speed reducing cavity, 3-movable assembly, 31-movable rod, 311-front clamping ring, 312-rear clamping ring, 32-sealing plug, 33-spring, 34-fixing structure, 341-fixing pin, 342-limiting pipe, 343-powder containing cavity, 35-sealing part and 36-movable pipe;

4-hydrogen burner, 41-hydrogen inlet pipe, 42-combustion chamber, 421-secondary combustion chamber, 422-hydrogen jet orifice, 423-oxygen jet orifice, 424-feeding gas ring, 425-annular combustion chamber, 43-oxygen inlet pipe, 44-exhaust pipe, 45-flow-limiting rod and 451-flow-limiting lug.

Detailed Description

In the following description, numerous implementation details are set forth in order to provide a more thorough understanding of the present invention. It should be understood, however, that these implementation details should not be used to limit the invention. That is, in some embodiments of the invention, details of these implementations are not necessary. In addition, some conventional structures and components are shown in simplified schematic form in the drawings.

Example one

Referring to fig. 1, the utility model discloses by following structure composition, two tail gas treatment pipeline that follow chemical plant and come out are epoxypropane tail gas pipe A for one, contain 70% hydrogen waste gas in the tail gas, one is aniline tail gas pipe B, contain 90% hydrogen waste gas in the tail gas, because contain other waste materials yet, so need get rid of solid and liquid impurity through the processing of high chlorine water, so design let aniline tail gas pipe B into high chlorine water seal tank C earlier, utilize high chlorine water to combine with hydrogen and form hydrochloric acid on the one hand and come preliminary treatment hydrogen waste gas, thereby aniline in the tail gas can be detached with the hydrochloric acid reaction to aniline impurity simultaneously, on the other hand plays the effect that prevents the tempering through high chlorine water seal tank C; and then introducing the residual gas into a high-chlorine buffer tank D through a gas transfer pipe E to carry out secondary tail gas treatment so as to further purify the tail gas, meanwhile, the high-chlorine buffer tank D is also connected with a propylene oxide tail gas pipe A, after propylene oxide is injected into the high-chlorine buffer tank D, hydrogen reacts with chlorine to generate hydrochloric acid, the hydrochloric acid continuously reacts with the propylene oxide so as to treat the propylene oxide, the treated gas still has a certain amount of hydrogen and impurities, then the hydrogen is blown into a hydrogen combustor G and a natural gas combustion furnace H through an anti-backfire device F to carry out combustion treatment so as to fundamentally treat the finished tail gas, and the generated energy and products are further recycled.

This device can high-efficiently get rid of various impurity and hydrogen waste gas that contain in the tail gas through the chain reaction that high chlorine water goes on tail gas, and is simple high-efficient, then carries out the burning treatment of tail gas through firing burning furnace, has both produced the energy and can conveniently retrieve and innocent treatment tail gas, has reduced the pollution, and the setting of anti-backfire device can prevent to temper damage equipment, has improved the security of equipment.

Example two

Basically the same as the first embodiment, the difference is that the backfire arrester F is mainly composed of two parts, one part is a tubular structure formed by connecting a plurality of backfire decelerating rings 2 in series, the interior of the backfire decelerating rings 2 is hollow and the half section is similar to a center-through heart-shaped structure, the structure is similar to a tesla valve, no resistance is generated to fluid when the fluid flows in the forward direction, when the fluid flows in the reverse direction rapidly, the fluid in the front part is guided downwards on the inner surface of the backfire decelerating rings 2 to collide and turbulent with the fluid in the rear part, so that the speed of the fluid can be slowed down, the backfire can be decelerated to a very slow degree through the obstruction of the multiple backfire decelerating rings 2, the small backfire can disappear directly, and the backfire can be effectively obstructed with the gas in the front part by matching with the rest part, so as to prevent the backfire from igniting the igniter.

The other part device of anti-backfire comprises dustcoat 1 and inside movable assembly 3 cooperation, dustcoat 1 is the cavity tubular structure that a front and back end all was provided with the end cover, be provided with the hole of fretwork on the front end housing of dustcoat 1 and regard as tail gas entry 11, tail gas through the processing blows in from tail gas entry 11, the hole that is provided with the fretwork on the rear end housing of dustcoat 1 is tail gas outlet 12, tail gas blows in from tail gas outlet 12 in tempering speed reduction ring 2, the rear end of dustcoat 1 has still set up dustcoat back thread 13 for being connected with tempering speed reduction ring 2 screw thread.

The movable assembly 3 and the outer cover 1 are coaxially arranged and comprise a movable rod 31, a blocking plug 32, a spring 33, a fixed structure 34, a blocking part 35 and a movable tube 36, wherein the fixed structure 34 comprises a fixed pin 341 and a limiting tube 342, the limiting tube 342 is a hollow tube structure with an end cover at the bottom, a hollowed hole is formed in the center of the end cover so as to be matched with the movable rod 31 to slide, the fixed pin 341 is circumferentially distributed along the outer surface of the limiting tube 342, the inner end of the fixed pin 341 is fixedly connected with the limiting tube 342, the other end of the fixed pin 341 is fixedly connected with the outer cover 1, the movable part of the movable assembly 3 can be limited in axial motion through the fixed structure 34, the front end of the spring 33 is fixedly connected with the fixed tube 342, the rear end of the spring is fixedly connected with the movable rod 31 so as to provide axial force for the movable rod 31 and limit the movable rod 31 to only move back and forth along the axial direction, the rear end of the movable rod 31 is connected with the blocking part 35, the blocking part 35 is of a bowl-shaped structure so as to facilitate blowing out tail gas, meanwhile, during tempering, the airflow blows forwards to push the sealing part 35 to move forwards, and the sealing part is matched with the tail gas outlet 12 of the outer cover 1 to form a tempering sealing structure, so that medium tempering can be treated by sealing the tempering outside the outer cover.

The limiting pipe 341, the movable pipe 36 and the movable rod 3 are of a sliding structure sleeved layer by layer from outside to inside, the front part of the movable pipe 36 is provided with a plugging plug 32, the front end of the movable rod 3 is in contact connection with the plugging plug 32, and when the tempering impact force is large, the plugging part 35 drives the movable rod 3 to move forward to prop the plugging plug 32 to plug the tail gas inlet 11 of the outer cover 1 forward, so that tail gas is blocked from the front end of the outer cover 1, and the two-stage blocking of tempering can be realized.

The inside of spacing pipe 341 and the rear end of movable tube 36 have formed a powder holding chamber 343, and powder holding chamber 343 is filled with the powder material that meets the easy decomposition of heat, has burnt to dustcoat 1 inside when the tempering, because the temperature risees, the powder takes place to decompose and forms gaseous inflation, thereby it seals to promote the forward motion of movable tube 36 to make to seal up 32 and the cooperation of tail gas entry 11, and simultaneously, the gas of production can be fire-retardant nitrogen gas or carbon dioxide, can separate the tempering when gaseous with dustcoat 1 full-filling.

Two clamping rings, namely a front clamping ring 311 and a rear clamping ring 312 are fixedly arranged at the rear end of the movable rod 3, the packing part 35 slides between the front clamping ring 311 and the rear clamping ring 312, when tail gas is normally treated, the packing part 35 slides backwards to be in contact fit with the rear clamping ring 312, gas flows conveniently, and the packing part 35 slides forwards to be in contact fit with the front clamping ring 311 when tempering occurs, so that tempering is blocked.

EXAMPLE III

The hydrogen burner 4 is basically the same as the first embodiment, except that the main body of the hydrogen burner 4 is gourd-shaped, the hydrogen burner 4 is divided into a secondary combustion chamber 421 and an annular combustion chamber 425 at the head, one end of the annular combustion chamber 425 is connected with an oxygen inlet pipe 43 and the other end is connected with a hydrogen inlet pipe 41, the secondary combustion chamber 421 is connected with an exhaust pipe 44, a movable flow limiting rod 45 is arranged inside the hydrogen inlet pipe 41 to control the flow rate of hydrogen, a flow limiting bump 451 is arranged at the top end of the flow limiting rod 45, the flow limiting bump 451 is of a double-cone structure, the front conical surface of the flow limiting bump 451 is matched with the annular combustion chamber 425 to form a hydrogen jet orifice 422, hydrogen tail gas is jetted into the annular combustion chamber 425 at a certain angle and mixed with oxygen, a feeding gas ring 424 is arranged at the joint of the secondary combustion chamber 421 and the annular combustion chamber 425, the outside of the feeding gas ring 424 is connected with the oxygen inlet pipe 43, the feeding gas ring 424 is communicated with the annular combustion chamber 425 through a gap to form an oxygen jet orifice 423, the angle control of the oxygen jet flow opening 423 can realize the circulation of oxygen inside the annular combustion chamber 425 so as to fully mix the hydrogen and the oxygen, the secondary combustion chamber 421 can be arranged so that the mixed gas can have space for further reaction, and the secondary combustion chamber 421 can be internally provided with some equipment such as a turbine for power generation operation and the like.

The working principle is as follows:

1. and (3) normal working process: the method comprises the following steps that propylene oxide tail gas containing 70% of hydrogen and aniline project tail gas containing 90% of hydrogen are discharged from a factory through a propylene oxide tail gas pipe A and an aniline tail gas pipe B, the propylene oxide tail gas is injected into a high-chlorine water seal tank C to complete preliminary solid and liquid impurity washing, the hydrogen reacts with chlorine to generate hydrochloric acid, chlorine in the tail gas is removed preliminarily, then the tail gas is injected into a high-chlorine buffer tank D through a gas transfer pipe E to perform the same reaction to further remove hydrogen, the hydrogen chloride tail gas is converged with the propylene oxide tail gas and discharged together, and the propylene oxide tail gas is injected into the high-chlorine water buffer tank D to react and discharged together;

the tail gas after high-chlorine water treatment is blown into the anti-backfire device F, the tail gas enters the outer cover 1 through the tail gas inlet 11, the tail gas passes through the movable assembly 3 to blow the sealing part 35 to move backwards, the tail gas blows out of the outer cover 1 through the gap between the sealing part 35 and the outer cover 1 and then passes through the backfire decelerating ring 2, the tail gas can flow backwards without decelerating and is blown into the hydrogen burner G and the natural gas combustion furnace H due to the fact that the forward flowing gas in the backfire decelerating ring 2 is not blocked, the tail gas is blown into the hydrogen burner 4 from the hydrogen inlet pipe 41 and enters the annular combustion cavity 425 through the hydrogen jet flow port 422, then is mixed with the oxygen entering from the oxygen inlet pipe 43 to be combusted, and then is discharged through the secondary combustion chamber 421 and the exhaust pipe 44, and therefore the whole tail gas treatment process is achieved.

2. Five-stage blocking process for tempering: if the backfire occurs in the hydrogen burner 4, the flow-limiting rod 45 can be contracted to block the hydrogen jet orifice 422 by using the flow-limiting projection 451, so as to block the input of the hydrogen tail gas, thereby avoiding the micro backfire accident.

When the backfire reaches the backfire preventing device F, the backfire reducing ring 2 passes through firstly, the reverse fluid in the backfire reducing ring 2 can be blocked, the backfire head expansion fluid can flow reversely under the guidance of the inner surface of the backfire reducing ring 2 and collide with the rear expansion fluid to generate backfire resistance, and the effect is similar to the reverse flow blocking effect of a Tesla valve. The decelerated flashback comes into contact with the packing member 35, pushing the packing member 35 forward and forming a packing structure with the housing 1, thereby interrupting the flashback.

Further, if the tempering is large, the partition member 35 receives a large pushing force, the partition member 35 pushes the front snap ring 311 to further push the movable rod 31 to move forward, and the movable rod 31 pushes the movable pipe to drive the sealing plug 32 to finally seal the tail gas inlet 11, so as to block the tempering.

Further, if the backfire enters the outer cover 1, the temperature inside the powder accommodating cavity 343 is raised, so that the powder is decomposed to generate a large amount of gas, the gas is a flame-retardant gas such as nitrogen or carbon dioxide, the gas pushes the movable pipe 36 to further plug forward, and the gas is sprayed out from the powder accommodating cavity 343 to perform flame-retardant fire extinguishing on the backfire.

And furthermore, if the anti-backfire device is broken by backfire and enters the high-chlorine buffer tank D forwards, the high-chlorine buffer tank D and the high-chlorine water-sealed tank C are both internally provided with water solutions, so that a final anti-backfire structure can be formed.

The present invention is not limited to the above-described embodiments, and various changes can be made within the knowledge range of those skilled in the art without departing from the spirit of the present invention, and the changed contents still belong to the protection scope of the present invention.

Claims (6)

1. Hydrogen-containing tail gas processing apparatus, its characterized in that: the system comprises a propylene oxide tail gas pipe, an aniline tail gas pipe, a high-chlorine water seal tank, a high-chlorine buffer tank, a gas transfer pipe, an anti-backfire device, a hydrogen burner and a natural gas combustion furnace, wherein an inlet of the high-chlorine water seal tank is connected with the aniline tail gas pipe, an outlet of the high-chlorine water seal tank is connected with the gas transfer pipe to form an aniline tail gas primary treatment structure, the high-chlorine buffer tank is provided with two inlets and is respectively connected with the gas transfer pipe and the propylene oxide tail gas pipe to form a secondary tail gas hydrogen treatment structure, an outlet of the high-chlorine buffer tank is connected with the anti-backfire device, an outlet of the anti-backfire device is provided with two branch lines, one branch line is connected with the hydrogen burner, and the other branch line of the anti-backfire device is connected with the natural gas combustion furnace;

the anti-backfire device comprises an outer cover, a movable assembly and a backfire decelerating ring, wherein the front end and the rear end of the outer cover are respectively provided with a tail gas inlet and a tail gas outlet;

the tempering speed reducing ring is of a hollow annular structure, a tempering speed reducing cavity is arranged in the tempering speed reducing ring, the tempering speed reducing cavity is of a heart-shaped cavity structure which is axially directed from the front end to the rear end and is through from front to back, and a plurality of tempering speed reducing rings are connected through threads to form a tempering speed reducing pipe;

the movable assembly is coaxially arranged in the outer cover, a bowl-shaped packing part is arranged at the rear end of the movable assembly, the packing part extends out of the outer cover and forms a tempering packing structure with a tail gas outlet at the rear end of the outer cover, outer cover rear threads are arranged at the rear end of the outer cover, and the tempering speed reducing ring at the foremost end is in threaded connection with the outer cover rear threads.

2. The hydrogen-containing off-gas treatment device according to claim 1, characterized in that: the movable assembly includes the movable rod of coaxial setting, seals stopper, spring, fixed knot structure, seals spacing body and movable tube, fixed knot structure with dustcoat fixed connection, fixed knot structure, movable tube and movable rod form from outer to interior slip cap in proper order and establish the structure, fixed knot structure anterior with movable tube sliding connection and rear end are provided with the fretwork hole, the movable rod passes fixed knot structure's fretwork hole and with movable tube sliding connection, the front end of movable tube with shutoff stopper fixed connection, the spring housing is located the movable rod outer and front end with fixed knot structure fixed connection, the movable rod front end with seal and block up the rear end and contact and connect, seal spacing body, spring, movable rod and shutoff stopper transmission match and with the tail gas entry forms second grade tempering and seals the structure of separating.

3. The hydrogen-containing off-gas treatment device according to claim 2, characterized in that: the rear portion of the movable rod is fixedly provided with a front clamping ring and a rear clamping ring, a gap is reserved between the front clamping ring and the rear clamping ring, and the partition body is slidably sleeved on the rear portion of the movable rod to form a buffer structure between the front clamping ring and the rear clamping ring.

4. The hydrogen-containing off-gas treatment device according to claim 2, characterized in that: the fixing structure comprises fixing legs and a limiting tube, the limiting tube is a hollow tube structure with a hole sealing cover arranged at the bottom, the fixing legs are in a circumferential array by taking a central shaft of the limiting tube as an axis, the inner ends of the fixing legs are fixedly connected with the limiting tube, the other ends of the fixing legs are fixedly connected with the outer cover, and the limiting tube is in sliding connection with the movable tube;

the rear end of the movable pipe and the limiting pipe form a powder containing cavity, compound powder which is decomposed into gas when the compound powder is heated is filled in the powder containing cavity, and the powder containing cavity, the movable pipe, the sealing plug and the tail gas inlet are matched to form an expansion gas sealing plug structure.

5. The hydrogen-containing off-gas treatment device according to claim 2, characterized in that: the hydrogen combustor comprises a hydrogen inlet pipe, a combustion chamber, an oxygen inlet pipe and an exhaust pipe, wherein the front end of the combustion chamber is fixedly connected with the hydrogen inlet pipe, the exhaust pipe is arranged at the rear end of the combustion chamber, a feeding gas ring is arranged on the side surface of the combustion chamber, the outer part of the feeding gas ring is communicated with the oxygen inlet pipe, a gas injection gap is formed in the feeding gas ring and is communicated with the inner part of the combustion chamber to form an oxygen jet flow port, and the oxygen jet flow port is tangential to the inner surface of the combustion chamber;

the rear end of the combustion chamber is also provided with a spherical secondary combustion chamber, the feeding gas ring is arranged at the joint of the combustion chamber and the secondary combustion chamber, and the exhaust pipe is communicated with the secondary combustion chamber.

6. The hydrogen-containing off-gas treatment device according to claim 1, characterized in that: the hydrogen gas inlet pipe is internally provided with a flow-limiting rod, the top end of the flow-limiting rod is provided with a double-cone-shaped flow-limiting lug, the front conical surface of the flow-limiting lug is matched with the inner surface of the combustion chamber to form a hydrogen gas jet flow port, and the rear conical surface of the flow-limiting lug is matched with the combustion chamber to form an annular combustion chamber.

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