CN115875985A

CN115875985A - Tube furnace

Info

Publication number: CN115875985A
Application number: CN202310044788.5A
Authority: CN
Inventors: 李易轩; 李顺常; 蔡新国; 张超; 李勇; 贾久祥; 王敬森
Original assignee: Tangshan Kailuan Carbon Chemical Co ltd
Current assignee: Tangshan Kailuan Carbon Chemical Co ltd
Priority date: 2023-01-30
Filing date: 2023-01-30
Publication date: 2023-03-31
Anticipated expiration: 2043-01-30
Also published as: CN115875985B

Abstract

The utility model relates to a tubular furnace relates to heating combustion apparatus's technical field, the induction cooker comprises a cooker bod, the furnace body lower extreme is equipped with the combustor, and the upper end is equipped with the pipe of discharging fume, the intercommunication has the intake pipe on the combustor, the intraductal exhaust-gas treatment subassembly that is equipped with of discharging fume, the intercommunication has and is located on the pipe of discharging fume the muffler of exhaust-gas treatment subassembly top, the muffler is kept away from the one end intercommunication of the pipe of discharging fume the intake pipe, the muffler with the union coupling of discharging fume is equipped with the switching subassembly. This application has the effect that reduces flue gas denitration cost, improves the simplicity of denitration work.

Description

Tube furnace

Technical Field

The application relates to the field of heating combustion equipment, in particular to a tube furnace.

Background

The tubular heating furnace is a process heating furnace used in petroleum refining, petrochemical industry, coal chemical industry, tar processing, crude oil transportation and other industries, a medium flowing in the tubular heating furnace for a heated substance is gas or liquid, and the heating mode is directly subjected to fire.

The smoke discharged by the tubular furnace contains a large amount of nitrogen oxides, and direct discharge can cause a series of environmental problems such as acid rain, photochemical smog, ozone layer damage, haze and the like. Therefore, the denitration of the flue gas and the control of the discharge amount of nitrogen oxides are imperative. In order to reduce the content of nitrogen oxides in flue gas, the tube furnace is usually equipped with an external independent denitration device, but the cost is large and the operation is inconvenient.

Disclosure of Invention

The utility model provides a tubular furnace for reduce flue gas denitration cost, improve the simplicity of denitration work.

The utility model provides a tubular furnace, includes the furnace body, the furnace body lower extreme is equipped with the combustor, and the upper end is equipped with the pipe of discharging fume, the intercommunication has the intake pipe on the combustor, the intraductal exhaust-gas treatment subassembly that is equipped with of discharging fume, the intercommunication has the muffler that is located on the pipe of discharging fume the exhaust-gas treatment subassembly top, the muffler is kept away from the one end intercommunication of the pipe of discharging fume the intake pipe, the muffler with the union coupling of discharging fume is equipped with the switching subassembly.

Through adopting above-mentioned technical scheme, the gas gets into combustor department from the intake pipe, thereby the combustor sprays flame in the furnace body simultaneously and directly heats the furnace body inside, the flue gas that the burning produced gets into the pipe of discharging fume, the exhaust-gas treatment subassembly of the pipe department of discharging fume handles the flue gas through catalytic reduction's method, make nitrogen oxide content in the flue gas reduce, and convert N and HO into, when switching module starts to make muffler and the pipe intercommunication of discharging fume this moment, the flue gas after handling gets into the intake pipe once more through the muffler again, get into in the combustor once more, the combustor burns under the hypoxemia, reduce nitrogen oxide's production, thereby reduce nitrogen oxide in the flue gas, in addition, exhaust-gas treatment subassembly can also handle the flue gas through absorptive method, switching module directly seals the muffler, and make the pipe of discharging fume unblocked, the flue gas after handling directly is discharged from the pipe of discharging fume, according to nitrogen oxide's concentration in the flue gas, adjust suitable processing mode, thereby reduce the treatment cost, improve the convenience of handling.

Optionally, the exhaust-gas treatment subassembly is including setting up the inside backup pad of exhaust pipe, the through-hole has been seted up in the backup pad, be equipped with the exhaust pipe in the through-hole, the exhaust pipe top is equipped with keeps off the petticoat pipe, it is equipped with to encircle to keep off the petticoat pipe below the solid fixed ring in the exhaust pipe outside, still be equipped with in the backup pad and be used for pegging graft gu fixed ring's fixed slot, gu fixed ring with it is equipped with a plurality of connecting plates between them to keep off between the petticoat pipe, the backup pad top is equipped with exhaust-gas treatment liquid, the liquid level height of exhaust-gas treatment liquid is less than the mouth of pipe height of exhaust pipe, and is higher than the height of connecting plate.

Through adopting above-mentioned technical scheme, the flue gas is from passing the waste gas pipe and reaching the below of keeping off the petticoat pipe, pass between adjacent connecting plate afterwards, and reach and keep off the petticoat pipe top, in this process, the flue gas passes exhaust-gas treatment liquid, and through keeping off the petticoat pipe, the height setting of exhaust gas pipe and exhaust-gas treatment liquid makes the flue gas can fully combine with exhaust-gas treatment liquid, improve the sufficiency that the flue gas was handled, when exhaust-gas treatment liquid is the aqueous solution of water or acid, alkali, salt, the flue gas is absorbed by exhaust-gas treatment liquid, directly arrange the external world through the pipe of discharging fume afterwards, when exhaust-gas treatment liquid is urea or aqueous ammonia, add the catalyst in exhaust-gas treatment liquid, the flue gas is direct to the backup pad heating simultaneously, make the flue gas reduced in exhaust-gas treatment liquid, then get into the combustor here under switching module's effect, this kind of mode can utilize the heat of flue gas itself, reduce extra heating energy input, improve energy utilization ratio.

Optionally, the connecting plate surrounds the outer side of the exhaust gas pipe, the connecting plate is arranged in an inclined manner relative to the center line of the exhaust gas pipe, and the rotating directions of all the connecting plates are the same.

Through adopting above-mentioned technical scheme, the flue gas passes between adjacent connecting plate to under the direction of connecting plate, make the flue gas promote waste gas treatment liquid and flow along same direction, make waste gas treatment liquid can fully combine the reaction with the flue gas from this, and then improve waste gas treatment liquid's treatment effect.

Optionally, the smoke exhaust pipe is internally provided with a containing cavity right opposite to the air return pipe, the opening and closing assembly comprises a rotating block which is arranged in the containing cavity and is rotatably connected with the smoke exhaust pipe, a T-shaped channel is formed in the rotating block, and a driving motor for driving the rotating block to rotate is arranged on the outer side of the smoke exhaust pipe.

Through adopting above-mentioned technical scheme, driving motor drives the turning block and rotates, T shape passageway in the turning block can rotate and control the switching of muffler along with the turning block, when T shape passageway both ends communicate respectively the both ends of discharging fume the pipe, when the remaining one end of T shape passageway is towards the muffler, muffler and the pipe intercommunication of discharging fume, when the remaining one end of T shape passageway deviates from the muffler, muffler and the pipe disconnection of discharging fume, and along with the rotation of turning block, T shape passageway can be adjusted with the relative angle of muffler and the pipe of discharging fume, and then the size of adjustment air input.

Optionally, a steam pipe is communicated with one side of the air inlet pipe, and a pressure compensation assembly is arranged between the steam pipe and the air inlet pipe.

Through adopting above-mentioned technical scheme, when intake pipe internal pressure was not enough, probably lead to the gas introduction volume to reduce even the tempering, when intake pipe internal pressure was not enough, pressure compensation subassembly made steam can follow the steam pipe and get into in the intake pipe, and then improved the pressure in the intake pipe for steam can be with the gas injection get into the combustor, improves the production security.

Optionally, the pressure compensation assembly includes a fixing shell disposed on the air inlet pipe, a sliding block is disposed in the fixing shell, one end of the sliding block passes through the air inlet pipe and is connected to the air inlet pipe in a sliding manner, a pressurizing pump is disposed on one side of the fixing shell, an overflow valve is further communicated with the fixing shell, a baffle for plugging a steam pipe is disposed in the steam pipe, one end of the baffle passes through the steam pipe and is connected to the steam pipe in a sliding manner, and a transmission member is disposed between the sliding block and the baffle.

Through adopting above-mentioned technical scheme, under the effect of charge pump, keep constant pressure and the same with the pressure of the normal work in the inlet tube in the set casing, when the pressure in the inlet tube is less than the pressure in the set casing, the sliding block slides to the inlet tube automatically, and remove through driving medium drive baffle, make the baffle open the steam pipe gradually, steam in the steam pipe gets into in the inlet tube, thereby replenish the pressure in the inlet tube, and inject the gas into the furnace body, when the pressure in the inlet tube is greater than the pressure in the set casing, the sliding block removes to the set casing, and make the baffle steam pipe shutoff, and then reduce the pressure in the inlet tube, from this pressure in can quick and the automatically regulated inlet tube, in this process, charge pump is to the set casing internal make-up pressure, the overflow valve is used for reducing the unnecessary pressure in the set casing.

Optionally, the transmission part includes a transmission rod fixedly connected with the sliding block, one end of the transmission rod, which is far away from the sliding block, penetrates through the fixed shell and is slidably connected with the fixed shell, the outer side of the fixed shell is rotatably connected with a rotating ring, a screw rod is coaxially fixed at one end of the transmission rod, which is located outside the fixed shell, the screw rod is connected with the rotating ring through ball threads, a poking rod is arranged on the rotating ring, a kidney-shaped hole is formed in the baffle, and one end of the poking rod, which is far away from the rotating ring, is inserted into the kidney-shaped hole.

Through adopting above-mentioned technical scheme, when the sliding block removed, drive the transfer line and remove, drive the screw rod translation simultaneously, because the swivel becket is connected through ball screw thread transmission with the screw rod, consequently the screw rod drives the swivel becket rotation at the removal in-process, and the swivel becket drives the poker rod and rotates when rotating, and then makes the baffle remove, and then accomplishes the switching work of steam pipe.

Optionally, the intake pipe is provided with a pressure gauge, and the intake pipe, the return pipe and the steam pipe are provided with electromagnetic valves.

Through adopting above-mentioned technical scheme, the solenoid valve can quick response to security when improving the trouble.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the waste gas treatment component can rapidly treat the flue gas, and a proper treatment mode is adjusted according to the concentration of nitrogen oxides in the flue gas, so that the treatment cost is reduced, and the convenience of treatment is improved;

2. the pressure compensation assembly enables steam to enter the air inlet pipe from the steam pipe, so that the pressure in the air inlet pipe is improved, the steam can inject fuel gas into the combustor, and production safety is improved.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;

FIG. 2 is a schematic view of the inner structure of the smoke exhaust pipe in the embodiment of the present application;

FIG. 3 is a schematic exploded view of an exhaust treatment assembly according to an embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of a pressure compensation assembly in an embodiment of the present application;

in the figure, 1, a furnace body; 11. an air inlet pipe; 12. a steam pipe; 2. a smoke exhaust pipe; 3. an air return pipe; 31. a fan; 4. an exhaust gas treatment component; 41. a support plate; 411. fixing grooves; 412. a clamping groove; 42. an exhaust gas pipe; 43. a smoke blocking cover; 431. an arc-shaped plate; 44. a connecting plate; 45. a fixing ring; 451. a groove; 452. a catalyst module; 453. a clamping block; 5. an opening and closing assembly; 51. rotating the block; 52. a drive motor; 53. a T-shaped channel; 6. a pressure compensation assembly; 61. a slider; 611. a limiting block; 62. a baffle plate; 621. a kidney-shaped hole; 63. a transmission rod; 64. a screw; 65. a rotating ring; 66. a poke rod; 67. a pressurizing pump; 68. an overflow valve; 69. a stationary case; 7. an electromagnetic valve; 8. and a pressure gauge.

Detailed Description

The present application is described in further detail below with reference to fig. 1-4.

Example (b): a tubular furnace, refer to fig. 1, includes furnace body 1, and furnace body 1 upper end intercommunication has smoke pipe 2, and the combustor is installed to the inside lower extreme of furnace body 1, and furnace body 1 below is equipped with the intake pipe 11 of intercommunication combustor, and the combustor is not shown in the picture. One side of the smoke exhaust pipe 2 is communicated with an air return pipe 3, and one end of the air return pipe 3, which is far away from the smoke exhaust pipe 2, is communicated with an air inlet pipe 11.

Referring to fig. 2 and 3, an exhaust gas treatment unit 4 and an opening/closing unit 5 are provided in the exhaust pipe 2, and the exhaust gas treatment unit 4 and the opening/closing unit 5 are provided in this order from the bottom. The waste gas treatment component 4 comprises a support plate 41 fixed inside the smoke exhaust pipe 2, a through hole is formed in the center of the support plate 41, a waste gas pipe 42 is arranged at the through hole, the lower end of the waste gas pipe 42 is fixedly connected with the support plate 41, and the upper end of the waste gas pipe 42 is located above the support plate 41. Be equipped with above the waste gas pipe 42 and keep off the petticoat pipe 43, keep off the high height all around in the middle of the petticoat pipe 43, and keep off the marginal height of petticoat pipe 43 and be less than the orificial height in waste gas pipe 42 upper end, keep off petticoat pipe 43 edge fixedly connected with a plurality of evenly distributed's connecting plate 44, the same solid fixed ring 45 of one end fixedly connected with that all connecting plates 44 kept away from the petticoat pipe 43, solid fixed ring 45 sets up with waste gas pipe 42 coaxial line. An annular fixing groove 411 is formed in the supporting plate 41, and the fixing ring 45 is inserted into the fixing groove 411.

Fixedly connected with joint piece 453 on the inside wall of solid fixed ring 45 has seted up joint groove 412 on the lateral wall of fixed slot 411, and joint groove 412 includes a vertical section and a horizontal segment, and the vertical section is connected to the horizontal segment, and joint piece 453 gets into from vertical section to reach the horizontal segment, rotate along the horizontal segment afterwards, reach the horizontal segment bottom, from this joint piece 453 pegs graft in joint groove 412.

The outer side wall of the fixing ring 45 is provided with a groove 451, and a catalyst module 452 is arranged in the groove 451. And adding an exhaust gas treatment liquid above the supporting plate 41, wherein the liquid level of the exhaust gas treatment liquid is higher than that of the connecting plate 44 and lower than the pipe orifice height at the upper end of the exhaust gas pipe 42.

The smoke exhaust pipe 2 is also internally provided with a containing cavity opposite to the air return pipe 3, the opening and closing assembly 5 comprises a rotating block 51 arranged in the containing cavity, the rotating block 51 is rotatably connected with the smoke exhaust pipe 2, the outer side of the smoke exhaust pipe 2 is provided with a driving motor 52, and an output shaft of the driving motor 52 is coaxially fixed with the rotating block 51 and used for driving the rotating block 51 to rotate. A T-shaped channel 53 is formed in the rotating block 51, and the end part of the T-shaped ventilation channel can be opposite to and communicated with the air return pipe 3.

According to the flue gas treatment method, the waste gas treatment liquid can be water or aqueous solution of acid, alkali and salt and is used for absorbing nitrogen oxides in flue gas, at the moment, the driving motor 52 drives the rotating block 51 to rotate, so that two ends of the T-shaped channel 53 are respectively communicated with two pipe openings of the smoke exhaust pipe 2, the rest end of the T-shaped channel 53 deviates from the air return pipe 3, the air return pipe 3 is closed, and the treated flue gas is directly discharged from the upper part of the smoke exhaust pipe 2.

The waste gas treatment liquid can also be urea or ammonia water for reducing nitrogen oxides. The flue gas below the support plate 41 smolders the support plate 41 so that the flue gas is denitrated by the exhaust gas treatment liquid cooperating with the reducing agent module. In addition, an electric heater may be further installed on the support plate 41 for ensuring that the denitration temperature is reached. At this time, the driving motor 52 drives the rotating block 51 to rotate, so that the remaining end of the T-shaped channel 53 is opposite to the air return pipe 3, the air return pipe 3 is communicated with the smoke exhaust pipe 2, and the treated smoke can be mixed with air to enter the air return pipe 3 and enter the air inlet pipe 11. A fan 31 is mounted on the return air pipe 3 for driving the air to flow toward the inlet pipe 11.

A circular arc plate 431 is fixed to the side of the exhaust hood 43 facing the exhaust pipe 42, and the inner diameter of the arc plate 431 is larger than the outer diameter of the exhaust pipe 42. The liquid or solid in the flue gas can move along the sidewall of the hood 43 onto the arc plate 431 and be temporarily stored above the arc plate 431.

In addition, the connection plates 44 are disposed obliquely with respect to the outer side wall of the exhaust pipe 42, and the rotation directions of all the connection plates 44 with respect to the exhaust pipe 42 are the same. The flue gas passes between the adjacent connecting plates 44 and is guided by the connecting plates 44 to push the exhaust gas treatment liquid to flow, so that the exhaust gas treatment liquid and the flue gas are fully combined.

Referring to fig. 1 and 4, the steam pipe 12 is further communicated with the air inlet pipe 11, the steam pipe 12 is obliquely arranged, and one end of the steam pipe 12, which is far away from the air inlet pipe 11, is far away from the furnace body 1. The joint of the steam pipe 12 and the air inlet pipe 11 is provided with a pressure compensation assembly 6, the pressure compensation assembly 6 comprises a fixed shell 69 fixed on the outer side of the air inlet pipe 11, a sliding block 61 is arranged inside the fixed shell 69, and one end of the sliding block 61 penetrates through the air inlet pipe 11 and is in sliding connection with the air inlet pipe 11. The end portions of both ends of the slide block 61 are fixed with stoppers 611 so that the slide block 61 does not separate from the intake duct 11. The steam pipe 12 is provided with a baffle plate 62 for blocking the steam pipe 12, and one end of the baffle plate 62 penetrates through the steam pipe 12 and is connected with the steam pipe 12 in a sliding manner. A transmission member for connecting and transmitting the steam pipe 12 and the sliding block 61 is provided between the end of the baffle plate 62 located on the steam pipe and the sliding block 61.

The transmission member comprises a transmission rod 63 fixedly connected to the sliding block 61, and one end of the transmission rod 63, which is far away from the sliding block 61, penetrates through the fixed shell 69 and is coaxially fixed with a screw 64. The screw 64 is connected with a rotating ring 65 in a ball screw thread connection mode, the rotating ring 65 is connected with the fixed shell 69 in a rotating mode, the rotating ring 65 is fixedly connected with a poke rod 66 which is obliquely arranged relative to the screw 64, one end, located on the steam pipe 12, of the baffle plate 62 is provided with a kidney-shaped hole 621, and one end, far away from the rotating ring 65, of the poke rod 66 penetrates through the kidney-shaped hole 621. The fixed case 69 is also communicated with a relief valve 68 and a charge pump 67.

The pressurizing pump 67 inflates the fixed casing 69 with gas to increase the pressure, and the relief valve 68 releases the pressure so that the fixed casing 69 maintains a constant pressure, and the pressure in the fixed casing 69 is the same as the normal operating pressure inside the intake pipe 11. When the pressure in the air inlet pipe 11 is insufficient, the sliding block 61 slides towards the inside of the air inlet pipe 11, so that the screw rod 64 synchronously moves, the rotating ring 65 is driven to rotate, the poke rod 66 drives the baffle plate 62 to slide, the tumble steam pipe 12 is gradually opened, and the steam in the steam pipe 12 supplements the pressure in the air inlet pipe 11.

When the internal pressure of the intake pipe 11 is greater than the internal pressure of the fixed casing 69, the slide block 61 slides toward the inside of the fixed casing 69, so that the screw 64 rotates the rotary switch in the reverse direction, thereby pushing the flapper 62 to block the steam pipe 12.

Solenoid valves 7 are installed on the intake pipe 11, the steam pipe 12 and the return pipe 3, and a pressure gauge 8 is installed on the intake pipe 11.

The implementation principle of the embodiment of the application is as follows: the pressure compensation assembly 6 enables gas in the gas inlet pipe 11 to enter the combustor, combusted smoke enters the smoke exhaust pipe 2 and is treated by the waste gas treatment assembly 4, the opening and closing assembly 5 is adjusted according to a treatment method, and the trend of the smoke is further adjusted.

The embodiments of the present invention are preferred embodiments of the present application, and the protection scope of the present application is not limited thereby, wherein like parts are denoted by like reference numerals. Therefore, the method comprises the following steps: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a tube furnace, includes furnace body (1), furnace body (1) lower extreme is equipped with the combustor, and the upper end is equipped with tub (2) of discharging fume, its characterized in that, the intercommunication has intake pipe (11) on the combustor, it is equipped with exhaust-gas treatment subassembly (4) in tub (2) to discharge fume, the intercommunication is located on tub (2) of discharging fume muffler (3) of exhaust-gas treatment subassembly (4) top, muffler (3) are kept away from the one end intercommunication of tub (2) of discharging fume intake pipe (11), muffler (3) with tub (2) junction of discharging fume is equipped with switching subassembly (5).

2. The tube furnace as claimed in claim 1, wherein the exhaust gas treatment assembly (4) comprises a support plate (41) disposed inside the smoke exhaust tube (2), a through hole is formed in the support plate (41), an exhaust gas tube (42) is disposed in the through hole, a smoke blocking cover (43) is disposed above the exhaust gas tube (42), a fixing ring (45) surrounding the exhaust gas tube (42) is disposed below the smoke blocking cover (43), a fixing groove (411) for inserting the fixing ring (45) is further disposed on the support plate (41), a plurality of connecting plates (44) connecting the smoke blocking cover (43) and the fixing ring are disposed between the fixing ring (45) and the smoke blocking cover, an exhaust gas treatment liquid is disposed above the support plate (41), and a liquid level of the exhaust gas treatment liquid is lower than a pipe orifice height of the exhaust gas tube (42) and higher than a height of the connecting plates (44).

3. A tube furnace according to claim 2, characterized in that the web (44) surrounds the flue gas duct (42) on the outside, and that the web (44) is arranged obliquely to the centre line of the flue gas duct (42), and that all webs (44) have the same direction of rotation.

4. The tube furnace as claimed in claim 3, wherein a containing cavity facing the air return tube (3) is arranged in the smoke exhaust tube (2), the opening and closing assembly (5) comprises a rotating block (51) which is arranged in the containing cavity and rotatably connected with the smoke exhaust tube (2), a T-shaped channel (53) is arranged in the rotating block (51), and a driving motor (52) for driving the rotating block (51) to rotate is arranged outside the smoke exhaust tube (2).

5. A tube furnace according to claim 1, characterized in that a steam tube (12) is connected to one side of the inlet tube (11), and a pressure compensating unit (6) is provided between the steam tube (12) and the inlet tube (11).

6. The tube furnace as claimed in claim 5, wherein the pressure compensation assembly (6) comprises a fixed shell (69) arranged on the air inlet tube (11), a sliding block (61) is arranged in the fixed shell (69), one end of the sliding block (61) penetrates through the air inlet tube (11) and is in sliding connection with the air inlet tube (11), a pressurizing pump (67) is arranged on one side of the fixed shell (69), an overflow valve (68) is communicated with the fixed shell (69), a baffle plate (62) for plugging the steam tube (12) is arranged in the steam tube (12), one end of the baffle plate (62) penetrates through the steam tube (12) and is in sliding connection with the steam tube (12), and a transmission piece is arranged between the sliding block (61) and the baffle plate (62).

7. The tube furnace as claimed in claim 6, wherein the transmission member comprises a transmission rod (63) fixedly connected with a sliding block (61), one end of the transmission rod (63) far away from the sliding block (61) penetrates through the fixed shell (69) and is slidably connected with the fixed shell (69), a rotating ring (65) is rotatably connected to the outer side of the fixed shell (69), a screw rod (64) is coaxially fixed to one end of the transmission rod (63) outside the fixed shell (69), the screw rod (64) is in threaded connection with the rotating ring (65) through a ball, a poke rod (66) is arranged on the rotating ring (65), a kidney-shaped hole (621) is formed in the baffle plate (62), and one end of the poke rod (66) far away from the rotating ring (65) is inserted into the kidney-shaped hole (621).

8. A tube furnace according to claim 7, characterized in that the inlet tube (11) is provided with a pressure gauge (8), and the inlet tube (11), the return tube (3) and the steam tube (12) are provided with solenoid valves (7).