Segmented heating coke oven combustion chamber vertical flue structure

Abstract

The utility model relates to a vertical flame path structure of a coke oven combustion chamber with a segmented heating function. At least one segmented gas outlet is formed in each of two sides of a duplex vertical flame path partition wall; bottom gas outlets are formed in the bottoms of the two flame paths in the same duplex vertical flame path respectively, and the bottom gas outlets are communicated with a gas pipeline connected into the lower portion of the combustion chamber. A segmented gas channel is arranged in the duplex vertical flue partition wall, and the segmented gas outlet is connected with a gas pipeline through the segmented gas channel; the segmented gas outlet is a segmented air outlet and / or a segmented coal gas outlet; the bottom gas outlet is a bottom air outlet and / or a bottom coal gas outlet; the segmented gas channel is a segmented air channel and / or a segmented coal gas channel; and the gas pipelines are a gas supply pipeline and a waste gas guide-out pipeline. According to the utility model, the heating mode of symmetrical or consistent airflow direction in the duplex vertical flame path can be realized, so that the working form of the coke oven heating system is more flexible and variable.

Description

Technical Field

[0001] The utility model relates to a vertical coke oven combustion chamber structure, in particular to a vertical flue structure of a coke oven combustion chamber with sectional heating. Background Art

[0002] The technology of sectional combustion in coke oven vertical flues has been widely applied to large-scale machine-installed coke ovens. However, their structural forms are generally the same, that is, the gas outlets in the two vertical flues of the double vertical flues are symmetrically arranged or arranged in the same direction, and multiple gas outlets are arranged on each transverse partition wall (including the partition wall between the double vertical flues and the partition wall between the two vertical flues in the same double vertical flue).

[0003] The Chinese invention patent with the authorization announcement number CN 107033927 B discloses "a vertical flue structure of a coke oven combustion chamber with sectional heating". The coke oven combustion chamber is composed of multiple vertical flues, and every two vertical flues form a double vertical flue. A combustion-supporting air bottom outlet and a lean gas bottom outlet are arranged at the bottom of the vertical flue. Multiple combustion-supporting air outlets and multiple lean gas outlets are arranged along the height direction on the vertical flue partition wall; the elevations of each section of the combustion-supporting air outlets in the multiple sections of combustion-supporting air outlets and the elevations of each section of the lean gas outlets in the multiple sections of lean gas outlets are all different, and the elevation of the last section of combustion-supporting air outlet is higher than the elevation of the last section of lean gas outlet. By limiting the height positions of each section of combustion-supporting air outlets and lean gas outlets and the supply amounts of each section of combustion-supporting air and gas, the purpose of suppressing the generation of NOx during the combustion process of the vertical flue is achieved to meet higher environmental protection requirements.

[0004] The Chinese patent application with the application publication number CN 113025349 A discloses "a vertical flue structure of a coke oven with sectional heating and sectional waste gas recycling". The coke oven vertical flue is a double vertical flue. The tops of the two vertical flues forming the double vertical flue are connected through a crossover hole, and the two vertical flues are additionally connected through a waste gas recycling hole; multiple gas outlets are respectively arranged along the height direction on the outer partition walls on both sides of the double vertical flue and / or the middle partition wall between the two vertical flues; multiple waste gas recycling holes are arranged along the height direction on the middle partition wall, and the bottommost one is the bottom waste gas recycling hole. The utility model increases the waste gas recycling amount by arranging multiple waste gas recycling holes. Its structure is simple and easy to implement, can increase the mixing degree of combustible gas, combustion-supporting gas and recycled waste gas, weaken the combustion intensity, and thus effectively improve the uniformity of high-direction heating of the coke oven and reduce the generation amount of nitrogen oxides.

[0005] The above single-form combustion chamber sectional heating structure restricts the change and innovation of the coke oven heating form and can no longer meet the actual development needs of the coke oven. Summary of the Invention

[0006] The utility model provides a vertical flue structure of a coke oven combustion chamber with sectional heating, which breaks through the limitation of the single form of the existing sectional heating structure of the combustion chamber, provides a new idea and structural form, can realize the heating mode with symmetrical or consistent air flow directions in the double vertical flues, makes the working form of the coke oven heating system more flexible and changeable, provides the possibility for developing a new coke oven heating system and adjustment means, and is beneficial to further promoting the uniformity of coke oven heating.

[0007] In order to achieve the above object, the utility model is realized by adopting the following technical solutions:

[0008] A vertical flue structure of a coke oven combustion chamber with sectional heating, the coke oven combustion chamber is composed of a plurality of double vertical flues, two adjacent double vertical flues are separated by a double vertical flue partition wall, the two flues forming the double vertical flue are separated by a vertical flue partition wall, and the tops of the two flues are communicated through a crossover hole, and the bottoms are communicated through an exhaust gas recirculation hole; at least one sectional gas outlet is arranged on each side of the double vertical flue partition wall; bottom gas outlets are respectively arranged at the bottoms of the two flues in the same double vertical flue, and the bottom gas outlets are connected with a gas pipeline connected to the lower part of the combustion chamber; a sectional gas channel is arranged in the double vertical flue partition wall, and the sectional gas outlet is connected with the gas pipeline through the sectional gas channel; the sectional gas outlet is a sectional air outlet and / or a sectional gas outlet; the bottom gas outlet is a bottom air outlet and / or a bottom gas outlet; the sectional gas channel is a sectional air channel and / or a sectional gas channel; the gas pipeline is a gas supply pipeline and an exhaust gas export pipeline.

[0009] Furthermore, a gas flow regulating device is arranged at the sectional gas outlet.

[0010] Furthermore, the gas flow regulating device is composed of a regulating brick seat and a regulating brick; the regulating brick seat is integrally built with the double vertical flue partition wall, and the regulating brick is placed in the regulating brick seat.

[0011] Furthermore, when the sectional gas channel is a sectional air channel and a sectional gas channel, a partition plate is arranged in the middle of the sectional gas channel.

[0012] Furthermore, the sight hole above the flue with the sectional gas outlet is a square sight hole, and the sight holes above the end flues on both the machine side and the coke side are circular sight holes.

[0013] Furthermore, 1 to 5 sectional gas outlets are arranged along the height direction.

[0014] Furthermore, the corresponding sectional gas outlets of two adjacent flues are arranged on the same horizontal plane or are staggered.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] It breaks through the limitation of the single structural form of the existing segmented heating of the combustion chamber, provides a new idea and structural form, can realize the heating method with symmetrical or consistent air flow directions in the double parallel flues, makes the working form of the coke oven heating system more flexible and changeable, provides the possibility for developing a new coke oven heating system and adjustment means, and is conducive to further promoting the uniformity of coke oven heating. Brief Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the vertical flue structure of the segmented heating coke oven combustion chamber described in Embodiment 1 of the present invention.

[0018] Figure 2 It is a schematic diagram of the vertical flue structure of the segmented heating coke oven combustion chamber described in Embodiment 2 of the present invention.

[0019] In the figure: 1. Flue; 2. Double parallel flue partition wall; 3. Crossing hole; 4. Exhaust gas circulation hole; 5. Segmented gas outlet; 6. Segmented gas channel; 7. Bottom gas outlet; 8. Square viewing hole; 9. Round viewing hole. Detailed Embodiments

[0020] The following further describes the detailed embodiments of the present invention with reference to the drawings:

[0021] As Figure 1 、 Figure 2 shown, for the vertical flue structure of the segmented heating coke oven combustion chamber described in the present invention, the coke oven combustion chamber is composed of multiple double parallel flues. The adjacent two double parallel flues are separated by the double parallel flue partition wall 2. The two flues 1 that make up the double parallel flues are separated by a vertical flue partition wall, and the tops of the two flues 1 are connected through a crossing hole 3 and the bottoms are connected through an exhaust gas circulation hole 4; at least one segmented gas outlet 5 is provided on each side of the double parallel flue partition wall 2; the bottoms of the two flues 1 in the same double parallel flue are respectively provided with bottom gas outlets 7, and the bottom gas outlets 7 are connected to the gas pipelines connected to the lower part of the combustion chamber; a segmented gas channel 6 is arranged in the double parallel flue partition wall 2, and the segmented gas outlet 5 is connected to the gas pipeline through the segmented gas channel 6; the segmented gas outlet 5 is a segmented air outlet and / or a segmented gas outlet; the bottom gas outlet 7 is a bottom air outlet and / or a bottom gas outlet; the segmented gas channel 6 is a segmented air channel and / or a segmented gas channel; the gas pipeline is a gas supply pipeline and an exhaust gas discharge pipeline.

[0022] Furthermore, a gas flow regulating device is provided at the segmented gas outlet 5.

[0023] Furthermore, the gas flow regulating device is composed of a regulating brick seat and a regulating brick; the regulating brick seat is integrally built with the double parallel flue partition wall 2, and the regulating brick is placed in the regulating brick seat.

[0024] Further, when the segmented gas passage 6 is a segmented air passage and a segmented gas passage, a partition plate is provided in the middle of the segmented gas passage 6.

[0025] Further, the viewing holes above the flues 1 provided with the segmented gas outlets 5 are square viewing holes 8, and the viewing holes above the end flues on both the machine side and the coke side are circular viewing holes 9.

[0026] Further, 1 to 5 segmented gas outlets 5 are arranged along the height direction.

[0027] Further, the corresponding segment gas outlets of two adjacent flues 1 are arranged on the same horizontal plane or staggered.

[0028] The working principle of the vertical flue structure of the coke oven combustion chamber with segmented heating according to the present invention is as follows: Except for the end flues on both the machine side and the coke side, air and gas or only air are supplied in segments in the remaining flues 1; within each heating and exchange cycle, air and gas or air are respectively supplied into each upflow flue through the bottom gas outlet 7 and the segmented gas outlet 5 on the double vertical flue partition wall 2, and the waste gas in each downflow flue is respectively discharged through the bottom gas outlet 7 and the segmented gas outlet 5 on the double vertical flue partition wall 2.

[0029] The gas flow rate of the segmented supply and the waste gas discharge flow rate are adjusted by the gas flow rate regulating device provided at the segmented gas outlet 5.

[0030] When a partition plate is provided in the middle of the segmented gas passage 6, different gases are supplied into the corresponding flues through the two segmented gas passages after partitioning.

[0031] The following embodiments are implemented on the premise of the technical solution of the present invention, and detailed implementation manners and specific operation processes are given, but the protection scope of the present invention is not limited to the following embodiments.

[0032]

Embodiment 1

[0033] As Figure 1 shown, in this embodiment, for the vertical flue structure of the coke oven combustion chamber with segmented heating, the vertical flues of the combustion chamber are arranged in pairs, and a pair of vertical flues are connected through the crossover holes 3 at the top and the waste gas circulation holes 4 at the bottom to form double vertical flues.

[0034] In this embodiment, except for the two flues 1 at the head (near the machine side) and the tail (near the coke side) of the combustion chamber, the air in the remaining flues 1 is supplied in sections. Specifically, sectional air outlets are respectively provided on both sides of the double-stand flue partition wall 2 between adjacent pairs of double-stand flues, and bottom air outlets are respectively provided at the bottoms of the corresponding flues; a sectional air passage 5 is arranged in the double-stand flue partition wall 2, and no sectional air outlet or sectional air passage is provided on the flue partition wall between the two flues 1 that form the double-stand flue.

[0035] In this embodiment, the air entering the upflow flues (flues 2#, 3#, 6#, 7#, 10# and 11#) is respectively supplied into the flues through the bottom air outlets at the bottoms of the corresponding flues 1 and the sectional air outlets on the double-stand flue partition wall 2. The waste gas in the downflow flues (flues 1#, 4#, 5#, 8#, 9# and 12#) is respectively discharged through the bottom air outlets at the bottoms of the corresponding flues 1 and the sectional air outlets on the double-stand flue partition wall 2.

[0036] In this embodiment, one sectional air outlet is provided in the middle of the double-stand flue partition wall 2 corresponding to each flue 1, and air is simultaneously supplied into the flues on both sides through the two sectional air outlets on the same double-stand flue partition wall 2, and the air flow directions in the two flues are mirror-symmetrical with the double-stand flue partition wall 2 as the mirror point.

[0037] In this embodiment, regulating brick seats are respectively arranged at the sectional air outlets 5 on the double-stand flue partition wall 2, and the air flow rate of the sectional supply is adjusted by sliding the regulating bricks in the regulating brick seats to change their positions, or by adding or reducing the number of regulating bricks.

[0038] In this embodiment, the viewing holes above the flues (flues 2# to 11#) provided with sectional air outlets adopt square viewing holes 8, while the viewing holes above the two end flues (flues 1# and 12#) near both the machine and coke sides adopt circular viewing holes 9.

[0039]

Embodiment 2

[0040] As Figure 2 shown, in this embodiment, for the vertical flue structure of the coke oven combustion chamber with sectional heating, the vertical flues of the combustion chamber are arranged in pairs, and a pair of vertical flues are connected through the crossover holes 3 at the top and the waste gas circulation holes 4 at the bottom to form double-stand flues.

[0041] In this embodiment, except for the two fire channels 1 at the head of the combustion chamber (close to the engine side) and the tail of the combustion chamber (close to the coke side), the air in the remaining fire channels 1 is supplied in sections. Specifically, sectioned air outlets are respectively provided on both sides of the double-linked fire channel partition wall 2 between two adjacent pairs of double-linked fire channels, and bottom air outlets are respectively provided at the bottom of the corresponding fire channels; a sectioned air channel 5 is provided in the double-linked fire channel partition wall 2, and a partition plate is provided in the middle of the sectioned air channel; and no sectioned air outlets and sectioned air channels are provided on the vertical fire channel partition wall between the two fire channels constituting the double-linked fire channels.

[0042] In this embodiment, the air entering the ascending vertical fire ducts (2#, 4#, 6#, 8#, 10# and 12# fire ducts) is supplied from the bottom air outlet at the bottom of the corresponding fire duct 1 and the segmented air outlet on the partition wall 2 of the double vertical fire ducts. The exhaust gas in the descending vertical fire ducts (1#, 3#, 5#, 7#, 9# and 11# fire ducts) is discharged from the bottom air outlet at the bottom of the corresponding fire duct 1 and the segmented air outlet on the partition wall 2 of the double vertical fire ducts.

[0043] In the present embodiment, a segmented air outlet is provided in the middle of the double fire channel partition wall 2 corresponding to each fire channel 1, and air is supplied to the corresponding fire channel 1 through a segmented air outlet on one side of the same double fire channel partition wall 2, and exhaust gas in the corresponding fire channel 1 is led out through another segmented air outlet on the other side of the same double fire channel partition wall 2, that is, the airflow direction in two adjacent pairs of double fire channels is consistent.

[0044] The above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the present invention according to the technical solution and inventive concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A vertical fire channel structure of a coke oven combustion chamber with segmented heating, wherein the coke oven combustion chamber is composed of a plurality of double-linked fire channels, two adjacent double-linked fire channels are separated by a double-linked fire channel partition wall, two fire channels constituting the double-linked fire channels are separated by a vertical fire channel partition wall, and the tops of the two fire channels are connected by a spanning hole, and the bottoms are connected by an exhaust gas circulation hole; characterized in that: At least one segmented gas outlet is provided on each side of the dual-connected fire channel partition wall; bottom gas outlets are provided at the bottoms of the two fire channels in the same dual-connected fire channel, respectively, and the bottom gas outlets are connected to the gas pipeline connected to the bottom of the combustion chamber; segmented gas channels are provided in the dual-connected fire channel partition wall, and the segmented gas outlets are connected to the gas pipeline through the segmented gas channels; the segmented gas outlets are segmented air outlets and / or segmented gas outlets; the bottom gas outlets are bottom air outlets and / or bottom gas outlets; the segmented gas channels are segmented air channels and / or segmented gas channels; the gas pipelines are gas supply pipelines and exhaust gas outlet pipelines.

2. The vertical flue structure of the coke oven combustion chamber with segmented heating according to claim 1 is characterized in that: A gas flow regulating device is provided at the segmented gas outlet.

3. The vertical flue structure of the coke oven combustion chamber with segmented heating according to claim 2 is characterized in that: The gas flow regulating device is composed of a regulating brick seat and regulating bricks; the regulating brick seat and the double-connected fire channel partition wall are integrally built, and the regulating bricks are placed in the regulating brick seat.

4. The vertical flue structure of the coke oven combustion chamber with segmented heating according to claim 1 is characterized in that: When the segmented gas channel is a segmented air channel and a segmented gas channel, a partition plate is arranged in the middle of the segmented gas channel.

5. The vertical flue structure of the coke oven combustion chamber with segmented heating according to claim 1, characterized in that: The fire viewing holes above the fire channel with segmented gas outlets are square fire viewing holes, and the fire viewing holes above the fire channels at both ends of the machine coke are round fire viewing holes.

6. The vertical flue structure of a coke oven combustion chamber with segmented heating according to claim 1, characterized in that: The segmented gas outlets are arranged in 1 to 5 numbers along the height direction.

7. The vertical flue structure of the coke oven combustion chamber with segmented heating according to claim 1, characterized in that: The gas outlets of the corresponding sections of two adjacent fire channels are arranged on the same horizontal plane, or are staggered.

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