CN112815304A

CN112815304A - Combustion device and annealing furnace combustion system

Info

Publication number: CN112815304A
Application number: CN202011638103.2A
Authority: CN
Inventors: 陈建波; 谢威; 杨扬; 王兵杰; 董平; 李志杰
Original assignee: Xinxing Ductile Iron Pipes Co Ltd
Current assignee: Xinxing Ductile Iron Pipes Co Ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-05-18
Anticipated expiration: 2040-12-31
Also published as: CN112815304B

Abstract

The invention provides a combustion device and an annealing furnace combustion system, belonging to the technical field of combustion systems. The gas pipe is communicated with the gas port. The combustion improver pipe is communicated with the combustion improver port. The heat exchange box is sealed and arranged outside the gas pipe and the combustion improver pipe, and is provided with a waste water pipe which is provided with an opening and closing valve. The filter vat is equipped with weeping mouth, gas outlet and inlet. The rotating piece is arranged in the filter barrel and divides the filter barrel into at least three independent filter spaces, and the rotating piece intermittently rotates along a preset angle. The driving mechanism is used for driving the rotating piece to rotate. The combustion device and the annealing furnace combustion system provided by the invention can avoid the problems that NOx in the flue gas pollutes air and heat in the flue gas is wasted if the flue gas exhausted from the smoke outlet pipe of the annealing furnace is not treated and utilized.

Description

Combustion device and annealing furnace combustion system

Technical Field

The invention belongs to the technical field of combustion systems, and particularly relates to a combustion device and a combustion system of an annealing furnace.

Background

In the combustion system of the annealing furnace, the annealing furnace ignites gas through a burner to heat, and the burned smoke is discharged through a smoke outlet pipe. The smoke discharged from the smoke outlet pipe contains a certain proportion of NOx, and if the NOx is not treated, the smoke is discharged to pollute air, and the smoke also contains a large amount of heat, and if the NOx is not utilized, the waste of energy is caused.

Disclosure of Invention

The invention aims to provide a combustion device and an annealing furnace combustion system, and aims to solve the problems that NOx in smoke pollutes air and heat in the smoke is wasted if the smoke discharged by a smoke outlet pipe of an annealing furnace is not treated and utilized.

In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a combustion device, including the nozzle that has gas port and combustion improver mouth, still include gas pipe, combustion improver pipe, heat transfer case, filter vat, intake pipe, rotation piece and actuating mechanism. One end of the gas pipe is communicated with the gas port, and the other end of the gas pipe is communicated with a gas supply device. One end of the combustion improver pipe is communicated with the combustion improver port, and the other end of the combustion improver pipe is communicated with a combustion improver supply device. The heat transfer case seal cover is located the gas pipe with the combustion improver outside of tubes and with nozzle fixed connection, the diapire be equipped with the waste pipe of heat transfer incasement intercommunication, the waste pipe be used for with waste water collection device intercommunication, be equipped with the open and close valve on the waste pipe. The filter vat is located the top of heat transfer case, the diapire is equipped with the weeping mouth, and the roof is equipped with the gas outlet, and the upper end of lateral wall is equipped with the inlet, the weeping mouth with the help of the weeping pipe with heat transfer case intercommunication, the inlet is used for being connected with the confession liquid device with the help of the feed liquor pipe. The air inlet pipe is provided with a vertical part, the top of the vertical part is higher than the filter vat, one end of the air inlet pipe is communicated with the bottom end of the filter vat, and the other end of the air inlet pipe is communicated with a smoke outlet pipe of the annealing furnace. Rotate the piece and locate in the filter vat, with the filter vat winds the axial lead of filter vat rotates to be connected, will the filter vat is cut apart into at least three independent filter space, all the filter space winds the axial lead equipartition of filter vat, wherein three the filter space corresponds respectively the weeping mouth the gas outlet with the inlet, the gas outlet with the intake pipe corresponds the same filter space, rotate the piece and rotate along presetting angle intermittent type formula, in order to realize the filter space passes through in proper order the inlet the gas outlet with the weeping mouth. The driving mechanism is arranged on the filter barrel and connected with the rotating piece and used for driving the rotating piece to rotate.

As another embodiment of this application, be equipped with on the diapire in the filter vat the coaxial location axle of filter vat, it includes the axis of rotation to rotate the piece. The axis of rotation is coaxial to be located epaxial, two terminal surfaces of axis of rotation respectively with the sealed laminating of roof and the diapire of filter vat.

As another embodiment of the present application, the rotating member further includes a partition plate. The division board is a plurality of, follows the radial vertical setting of axis of rotation, upper and lower both ends respectively with the sealed laminating of roof and the diapire of filter vat, follow the radial one end of axis of rotation with the sealed laminating of the lateral wall of filter vat, the other end with the sealed fixed connection of axis of rotation.

As another embodiment of the present application, the filtering space corresponding to the air outlet is adjacent to the filtering space corresponding to the liquid leakage port.

As another embodiment of the present application, the gas outlet is communicated with the oxidizer pipe by a gas outlet pipe.

As another embodiment of this application, the gas pipe with the combustion improver pipe is parallel, the quantity of gas pipe is a plurality ofly, and is a plurality of the gas pipe winds combustion improver pipe equipartition, the nozzle has and corresponds a plurality of gas ports of gas pipe, and is a plurality of the gas port winds combustion improver mouth equipartition, combustion improver mouth and the combustion improver pipe intercommunication that corresponds, burner still includes the annular pipe. The annular pipe is sleeved outside the combustion improver pipe and communicated with all the gas pipes, and the annular pipe is used for being communicated with a gas supply device.

As another embodiment of the present application, the diameter of the outlet pipe is smaller than that of the oxidant pipe, and one end of the outlet pipe is inserted into the oxidant pipe to form a U-shaped air passing gap with the inner wall of the fuel gas pipe.

As another embodiment of the present application, the communication position between the gas outlet pipe and the combustion improver pipe is located outside the heat exchange box, and is used for enabling the gas coming out of the gas outlet pipe and the gas in the combustion improver pipe to enter the heat exchange box after being mixed.

As another embodiment of this application, the length of axis of rotation is greater than the length of location axle, actuating mechanism include spliced pole, support and driving motor spliced pole with the coaxial setting of axis of rotation, the lower extreme is sealed to be penetrated the roof of filter vat and with the roof fixed connection of axis of rotation. The support is arranged on the filter vat and is fixedly connected with the filter vat. The driving motor is arranged on the bracket and fixedly connected with the bracket, and the output shaft is coaxially arranged above the connecting column and connected with the connecting column.

The combustion device provided by the invention has the beneficial effects that: compared with the prior art, the combustion device has the advantages that the liquid supply device injects ammonia water into one of the filtering spaces through the liquid inlet pipe, the driving mechanism drives the rotating part to intermittently rotate along a preset angle, the filtering space injected with the ammonia water can sequentially correspond to the gas outlet and the liquid leakage port, when the filtering space injected with the ammonia water corresponds to the gas outlet, the gas inlet pipe and the gas outlet correspond to the same filtering space, at the moment, smoke in the smoke outlet pipe enters the bottom of the filtering space through the gas inlet pipe, NOx in the smoke is filtered out through the ammonia water and then is discharged from the gas outlet, meanwhile, heat in the smoke can heat the ammonia water, and when the filtering space injected with the ammonia water corresponds to the liquid leakage port, the heated ammonia water can flow into the heat exchange box along the liquid leakage pipe, so that fuel gas in the gas pipe and combustion improver in the combustion improver are heated, the combustion efficiency of the fuel gas. A part of ammonia water in the heat exchange box can be discharged to the waste water collecting device through the opening and closing valve, so that the heat exchange box can intermittently and continuously receive the ammonia water leaked from the liquid leakage opening. In conclusion, by the device, NOx in the flue gas exhausted by the smoke outlet pipe is absorbed, and heat in the flue gas is utilized, so that the problems that the NOx in the flue gas pollutes air and the heat in the flue gas is wasted if the flue gas exhausted by the smoke outlet pipe of the annealing furnace is not processed and utilized can be avoided.

In order to achieve the purpose, the invention adopts the technical scheme that: there is provided an annealing furnace combustion system provided with a plurality of the combustion apparatuses described in any one of the above.

The annealing furnace combustion system provided by the invention has the beneficial effects that: compared with the prior art, the annealing furnace combustion system has the advantages that the plurality of combustion devices are arranged, so that the problems that NOx in smoke pollutes air and heat in the smoke is wasted if the smoke discharged from the smoke outlet pipe of the annealing furnace is not treated and utilized can be avoided.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic axial view of a combustion apparatus according to an embodiment of the present invention;

FIG. 2 is an enlarged schematic view of a portion A of FIG. 1;

FIG. 3 is a schematic axial view of a combustion apparatus according to an embodiment of the present invention, shown in FIG. 1;

fig. 4 is a schematic axial view of a combustion apparatus according to an embodiment of the present invention, shown in fig. 2.

In the figure: 1. burning a nozzle; 11. a gas port; 12. a combustion improver port; 21. a gas pipe; 22. a combustion improver tube; 221. a gas passing gap; 3. a heat exchange box; 31. a waste pipe; 311. an opening and closing valve; 4. a filter vat; 41. a liquid leakage port; 411. a liquid leakage pipe; 421. a liquid inlet pipe; 43. filtering the space; 44. positioning the shaft; 451. an air outlet pipe; 5. an air inlet pipe; 51. a vertical portion; 6. a rotating member; 61. a rotating shaft; 62. a partition plate; 7. a drive mechanism; 71. connecting columns; 72. a support; 73. a drive motor; 8. an annular tube.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1, 2 and 3 together, the combustion apparatus of the present invention will now be described. The combustion device comprises a burner 1 with a gas port 11 and a combustion improver port 12, and further comprises a gas pipe 21, a combustion improver pipe 22, a heat exchange box 3, a filter barrel 4, an air inlet pipe 5, a rotating piece 6 and a driving mechanism 7. One end of the gas pipe 21 is communicated with the gas port 11, and the other end is used for being communicated with a gas supply device. One end of the oxidizer tube 22 is communicated with the oxidizer port 12, and the other end is used for communicating with an oxidizer supply device. The heat exchange box 3 is sleeved outside the gas pipe 21 and the combustion improver pipe 22 in a sealing mode and is fixedly connected with the burner 1, a waste water pipe 31 communicated with the inside of the heat exchange box 3 is arranged on the bottom wall of the heat exchange box, the waste water pipe 31 is used for being communicated with a waste water collecting device, and an opening and closing valve 311 is arranged on the waste water pipe 31. The filter vat 4 is located the top of heat transfer case 3, and the diapire is equipped with weeping mouth 41, and the roof is equipped with the gas outlet, and the upper end of lateral wall is equipped with the inlet, and weeping mouth 41 communicates with heat transfer case 3 with the help of weeping pipe 411, and the inlet is used for being connected with the liquid supply device with the help of feed liquor pipe 421. The air inlet pipe 5 is provided with a vertical part 51, the top of the vertical part 51 is higher than the filter vat 4, one end of the air inlet pipe 5 is communicated with the bottom end of the filter vat 4, and the other end is used for being communicated with a smoke outlet pipe of the annealing furnace. The rotating part 6 is arranged in the filter barrel 4 and is connected with the filter barrel 4 in a rotating mode around the axial lead of the filter barrel 4, the filter barrel 4 is divided into at least three independent filter spaces 43, all the filter spaces 43 are uniformly distributed around the axial lead of the filter barrel 4, the three filter spaces 43 respectively correspond to the liquid leakage port 41, the gas outlet and the liquid inlet, the gas outlet corresponds to the same filter space 43 with the gas inlet pipe 5, and the rotating part 6 rotates intermittently along a preset angle to realize that the filter spaces 43 sequentially pass through the liquid inlet, the gas outlet and the liquid leakage port 41. The driving mechanism 7 is arranged on the filter vat 4 and connected with the rotating part 6 and used for driving the rotating part 6 to rotate.

Compared with the prior art, the combustion device provided by the invention has the advantages that ammonia water is injected into one filtering space 43 through the liquid inlet pipe 421 by the liquid supply device, the driving mechanism 7 drives the rotating part 6 to rotate intermittently along a preset angle, the filtering space 43 into which the ammonia water is injected can correspond to the air outlet and the liquid leakage opening 41 in sequence, when the filtering space 43 into which the ammonia water is injected corresponds to the air outlet, as the air inlet pipe 5 corresponds to the same filtering space 43 as the air outlet, the smoke in the smoke outlet pipe enters the bottom of the filtering space 43 through the air inlet pipe 5, the NOx in the smoke is filtered by the ammonia water and then is discharged from the air outlet, meanwhile, the heat in the smoke can also heat the ammonia water, when the filtering space 43 into which the ammonia water is injected corresponds to the liquid leakage opening 41, the heated ammonia water can flow into the heat exchange box 3 along the liquid leakage pipe 411, so that the combustion gas in the gas pipe 21 and the combustion improver, the energy is saved. A part of ammonia water in the heat exchange box 3 can be discharged to a waste water collecting device through the opening and closing valve 311, so that the heat exchange box 3 can intermittently and continuously receive the ammonia water leaked from the leakage port 41. In conclusion, by the device, NOx in the flue gas exhausted by the smoke outlet pipe is absorbed, and heat in the flue gas is utilized, so that the problems that the NOx in the flue gas pollutes air and the heat in the flue gas is wasted if the flue gas exhausted by the smoke outlet pipe of the annealing furnace is not processed and utilized can be avoided.

In this embodiment, the vertical portion 51 of the inlet pipe 5 is for preventing the ammonia water in the filtering space 43 from flowing backward into the outlet pipe. The fuel gas can be coke oven gas, and the combustion improver can be oxygen or air.

Referring to fig. 3 to 4, in order to realize the rotational connection between the rotating member 6 and the filtering barrel 4, a positioning shaft 44 coaxial with the filtering barrel 4 is disposed on the bottom wall of the filtering barrel 4, and the rotating member 6 includes a rotating shaft 61. The rotating shaft 61 is coaxially sleeved on the positioning shaft 44, and two end faces of the rotating shaft 61 are respectively attached to the top wall and the bottom wall of the filter barrel 4 in a sealing manner. The rotation of the rotating member 6 is realized through the rotating shaft 61, and the top wall and the bottom wall of the filter vat 4 axially limit the rotating shaft 61.

As a specific embodiment of the combustion apparatus provided by the present invention, referring to fig. 3 to 4, a plurality of partition plates 62 are vertically arranged along the radial direction of the rotating shaft 61, the upper and lower ends of each partition plate are respectively sealed and attached to the top wall and the bottom wall of the filter vat 4, one end of each partition plate along the radial direction of the rotating shaft 61 is sealed and attached to the side wall of the filter vat 4, and the other end of each partition plate is sealed and fixedly connected to the rotating shaft 61. Two adjacent partition plates 62, the rotating shaft 61 and the side wall of the filter vat 4 enclose a filter space 43.

Referring to fig. 4, as a specific embodiment of the combustion apparatus provided by the present invention, a filtering space 43 corresponding to the air outlet is adjacent to a filtering space 43 corresponding to the liquid leakage port 41. The ammonia water in the filtering space 43 corresponding to the air outlet is heated, and after the next rotation, the filtering space 43 corresponds to the liquid leakage port 41, so that the heat in the heated ammonia water can be prevented from being lost too much before corresponding to the liquid leakage port 41.

Referring to fig. 1, as a specific embodiment of the combustion apparatus provided by the present invention, the gas outlet is communicated with the oxidant tube 22 through the gas outlet tube 451, so that the gas in the gas outlet tube 451 is mixed with the gas in the oxidant tube 22, the gas in the gas outlet tube 451 contains water vapor carried from ammonia, and the water vapor finally escapes from the oxidant port 12, and the temperature of flame at the gas port 11 can be reduced through the water vapor, so as to reduce the generation of NOx.

Referring to fig. 1 to 2, a gas pipe 21 is parallel to an oxidant pipe 22, the number of the gas pipes 21 is multiple, the multiple gas pipes 21 are uniformly distributed around the oxidant pipe 22, the burner 1 has multiple gas ports 11 corresponding to the gas pipes 21, the multiple gas ports 11 are uniformly distributed around the oxidant port 12, the oxidant port 12 is communicated with the corresponding oxidant pipe 22, and the combustion device further includes an annular pipe 8. The annular pipe 8 is sleeved outside the combustion improver pipe 22 and communicated with all the gas pipes 21, and the annular pipe 8 is used for being communicated with a gas supply device. Therefore, the water vapor in the gas escaping from the combustion improver port 12 can be uniformly diffused to the periphery, so that the temperature of the flame at each gas port 11 is reduced.

As a specific embodiment of the combustion apparatus provided by the present invention, please refer to fig. 2, a diameter of the outlet pipe 451 is smaller than a diameter of the oxidant pipe 22, one end of the outlet pipe 451 is inserted into the oxidant pipe 22 to form a U-shaped air passing gap 221 with an inner wall of the gas pipe 21, so that in the air passing gap 221, the gas from the outlet pipe 451 is located in the middle and the periphery is the oxidant, so that the gas from the outlet pipe 451 is fully mixed with the oxidant, and the water vapor in the uniform mixed gas can uniformly reduce the temperature of the flame at each gas port 11, thereby preventing the temperature of the flame at one gas port 11 from not being effectively reduced.

Referring to fig. 1, the communicating portion between the air outlet pipe 451 and the oxidant pipe 22 is located outside the heat exchange box 3, so that the air flowing out of the air outlet pipe 451 and the air flowing in the oxidant pipe 22 are mixed and then enter the heat exchange box 3, the air flowing out of the air outlet pipe 451 and the air flowing in the oxidant pipe 22 are mixed by heating in the heat exchange box 3, the uniform mixed air is favorable for uniformly reducing the flame temperature at each gas port 11, and the flame temperature at one gas port 11 is prevented from being effectively reduced.

Referring to fig. 3, in order to realize that the driving mechanism 7 drives the rotating member 6 to rotate, the length of the rotating shaft 61 is greater than that of the positioning shaft 44, the driving mechanism 7 includes a connecting column 71, a bracket 72, and a driving motor 73, the connecting column 71 is coaxially disposed with the rotating shaft 61, and the lower end of the connecting column is hermetically penetrated through the top wall of the filter vat 4 and is fixedly connected with the top wall of the rotating shaft 61. The bracket 72 is arranged on the filtering barrel 4 and is fixedly connected with the filtering barrel 4. The driving motor 73 is arranged on the bracket 72 and fixedly connected with the bracket 72, and the output shaft is coaxially arranged above the connecting column 71 and connected with the connecting column 71. The output shaft of the driving motor 73 drives the rotating shaft 61 to rotate through the connecting column 71, thereby realizing the rotation of the rotating member 6.

The combustion system of the annealing furnace provided by the present invention will now be explained. The annealing furnace combustion system is provided with a plurality of combustion devices of any one of the above. The combustion devices are arranged, so that the problems that NOx in the flue gas pollutes air and heat in the flue gas is wasted if the flue gas exhausted from the smoke outlet pipe of the annealing furnace is not treated and utilized can be avoided.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. Burner, including the nozzle that has gas port and combustion-supporting agent mouth, its characterized in that still includes:

one end of the gas pipe is communicated with the gas port, and the other end of the gas pipe is communicated with a gas supply device;

one end of the combustion improver pipe is communicated with the combustion improver port, and the other end of the combustion improver pipe is communicated with a combustion improver supply device;

the heat exchange box is sleeved outside the gas pipe and the combustion improver pipe in a sealing manner and is fixedly connected with the burner, a waste water pipe communicated with the inside of the heat exchange box is arranged on the bottom wall of the heat exchange box and is used for being communicated with a waste water collecting device, and an opening and closing valve is arranged on the waste water pipe;

the filter barrel is positioned above the heat exchange box, a liquid leakage port is formed in the bottom wall of the filter barrel, an air outlet is formed in the top wall of the filter barrel, a liquid inlet is formed in the upper end of the side wall of the filter barrel, the liquid leakage port is communicated with the heat exchange box through a liquid leakage pipe, and the liquid inlet is used for being connected with a liquid supply device through a liquid inlet pipe;

the top of the vertical part is higher than the filter barrel, one end of the air inlet pipe is communicated with the bottom end of the filter barrel, and the other end of the air inlet pipe is used for being communicated with a smoke outlet pipe of the annealing furnace;

the rotating piece is arranged in the filtering barrel and is in rotating connection with the filtering barrel around the axial lead of the filtering barrel so as to divide the filtering barrel into at least three independent filtering spaces, all the filtering spaces are uniformly distributed around the axial lead of the filtering barrel, the three filtering spaces respectively correspond to the liquid leakage port, the air outlet and the liquid inlet, the air outlet and the air inlet pipe correspond to the same filtering space, and the rotating piece intermittently rotates along a preset angle so as to realize that the filtering spaces sequentially pass through the liquid inlet, the air outlet and the liquid leakage port; and

the driving mechanism is arranged on the filter barrel and connected with the rotating piece and used for driving the rotating piece to rotate.

2. The combustion apparatus as claimed in claim 1, wherein a positioning shaft coaxial with the filter vat is provided on a bottom wall in the filter vat, and the rotating member comprises:

the rotating shaft is coaxially sleeved on the positioning shaft, and two end faces of the rotating shaft are respectively attached to the top wall and the bottom wall of the filter barrel in a sealing mode.

3. The combustion apparatus of claim 2, wherein said rotating member further comprises:

the division board is a plurality of, follows the radial vertical setting of axis of rotation, upper and lower both ends respectively with the sealed laminating of roof and the diapire of filter vat, follow the radial one end of axis of rotation with the sealed laminating of the lateral wall of filter vat, the other end with the sealed fixed connection of axis of rotation.

4. The combustion device as claimed in claim 1, wherein said filtering space corresponding to said air outlet is adjacent to said filtering space corresponding to said leakage port.

5. The combustion apparatus as claimed in claim 1, wherein said outlet port is in communication with said oxidizer tube via an outlet tube.

6. The combustion apparatus as claimed in claim 5, wherein said gas pipe is parallel to said oxidizer pipe, a plurality of said gas pipes are provided, a plurality of said gas pipes are uniformly distributed around said oxidizer pipe, said burner has a plurality of gas ports corresponding to said gas pipe, a plurality of said gas ports are uniformly distributed around said oxidizer port, said oxidizer port communicates with a corresponding oxidizer pipe, said combustion apparatus further comprising:

and the annular pipe is sleeved outside the combustion improver pipe and communicated with all the gas pipes, and the annular pipe is used for being communicated with a gas supply device.

7. The combustion apparatus as claimed in claim 6, wherein the outlet pipe has a diameter smaller than that of the oxidant pipe, and one end of the outlet pipe is inserted into the oxidant pipe to form a U-shaped air passing gap with the inner wall of the gas pipe.

8. The combustion device as claimed in claim 7, wherein the connection between the outlet pipe and the combustion improver pipe is located outside the heat exchange box, and is used for enabling the gas coming out of the outlet pipe and the gas in the combustion improver pipe to enter the heat exchange box after being mixed.

9. The combustion apparatus of claim 2 wherein said rotatable shaft has a length greater than a length of said positioning shaft, said drive mechanism comprising:

the connecting column is coaxial with the rotating shaft, and the lower end of the connecting column penetrates through the top wall of the filter barrel in a sealing manner and is fixedly connected with the top wall of the rotating shaft;

the bracket is arranged on the filter barrel and is fixedly connected with the filter barrel;

the driving motor is arranged on the bracket and fixedly connected with the bracket, and the output shaft is coaxially arranged above the connecting column and connected with the connecting column.

10. A combustion system of a lehr, characterized in that a plurality of combustion apparatuses according to any one of claims 1 to 9 are provided.