A heat recovery coke oven suction regulating structure

Abstract

The present invention relates to a heat recovery coke oven suction regulating structure, comprising a gas channel connecting the heat recovery coke oven body and the flue gas duct and a cross-section regulating brick arranged in the gas channel; the gas channel is built with multiple layers of refractory bricks, and the cross-section regulating bricks are composed of a fixed part and a variable cross-section part, the fixed part is built in the innermost layer of refractory bricks, and the variable cross-section part is located in the gas channel; by changing the size of the variable cross-section part of the cross-section regulating brick, the cross-sectional area of ​​the gas channel is changed, the resistance in the corresponding gas channel and the suction of the corresponding carbonization chamber are changed, and finally the suction of each carbonization chamber in the heat recovery coke oven group under the action of the fan is kept consistent, thereby ensuring the continuous production of the heat recovery coke oven and the stable operation of the flue gas waste heat power generation system.

Description

Technical Field

[0001] The present invention relates to the technical field of heat recovery coke ovens, and in particular to a heat recovery coke oven suction regulating structure. Background Art

[0002] Current heat recovery coke ovens typically consist of the oven body and flue gas ducts. As coal is heated within the oven body, it releases raw gas, which mixes with combustion air and burns. The resulting high-temperature exhaust flows through the flue gas ducts and into the boiler to generate electricity. The heat recovery coke oven system operates under negative pressure, with suction provided by a fan. This prevents exhaust gas from escaping into the air, resulting in a cleaner plant compared to traditional coke ovens.

[0003] Heat recovery coke ovens are usually composed of 10 to 20 carbonization chambers arranged side by side. Each carbonization chamber is approximately 4 meters wide, so the total length of the oven group is approximately 40 to 80 meters. The waste heat boiler, fan, and combined flue gas duct are usually located at one end of the heat recovery coke oven. The suction force provided by the fan to the carbonization chamber at the farthest end of the heat recovery coke oven group must ensure that the high-temperature exhaust gas generated by this carbonization chamber flows smoothly into the combined flue gas duct. In addition, the carbonization chambers at different distances from the combined flue gas duct are subject to different fan suction forces. The fan suction force of the near-end carbonization chamber is much greater than that of the far-end carbonization chamber. This not only wastes energy but also easily leads to unstable flue gas flow field, making it difficult for the high-temperature flue gas generated by the carbonization chamber to flow smoothly into the combined flue gas duct, thus affecting the coking process and the flue gas waste heat power generation process. Summary of the Invention

[0004] The present invention provides a heat recovery coke oven suction adjustment structure, in which a cross-section adjustment brick is arranged in the gas channel connecting the heat recovery coke oven body and the flue gas duct. By changing the size of the variable cross-section part of the cross-section adjustment brick, the cross-sectional area of ​​the gas channel is changed, and the resistance in the corresponding gas channel and the suction of the corresponding carbonization chamber are changed. Finally, the suction of each carbonization chamber in the heat recovery coke oven group under the action of the fan is kept consistent, thereby ensuring the continuous production of the heat recovery coke oven and the stable operation of the flue gas waste heat power generation system.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A heat recovery coke oven suction adjustment structure comprises a gas channel connecting the heat recovery coke oven body and the flue gas duct and a cross-section adjustment brick arranged in the gas channel; the gas channel is built with multiple layers of refractory bricks, and the cross-section adjustment brick consists of a fixed part and a variable cross-section part, the fixed part is built in the innermost layer of refractory bricks, and the variable cross-section part is located in the gas channel; gas channels are respectively provided on the machine side and the coke side of each carbonization chamber of the heat recovery coke oven; the cross-section sizes of the variable cross-section parts of the cross-section adjustment bricks in the gas channels corresponding to different carbonization chambers are different; the cross-section sizes of the variable cross-section parts of the cross-section adjustment bricks in the two gas channels corresponding to the same carbonization chamber are the same; the suction of each carbonization chamber of the heat recovery coke oven under the action of a fan is kept consistent by setting the cross-section adjustment bricks.

[0007] Furthermore, in the heat recovery coke oven, the cross-sectional size of the variable cross-sectional portion of the cross-sectional adjustment brick in the gas passage corresponding to each carbonization chamber gradually decreases from the end close to the blower to the end away from the blower.

[0008] Furthermore, the innermost layer of refractory bricks and the cross-section adjustment bricks 3 are both silica bricks.

[0009] Furthermore, the refractory bricks other than the innermost layer of refractory bricks in the gas channel, i.e., the outer layer of refractory bricks, are clay bricks, floating bead bricks or insulation bricks.

[0010] Furthermore, the cross-sectional shape of the gas channel is rectangular or circular.

[0011] Furthermore, the heat recovery coke oven body is connected to the flue gas duct via a riser, and a plurality of gas channels are provided in the riser.

[0012] Furthermore, the cross-section adjustment bricks are set when the heat recovery coke oven is cold-laid.

[0013] Furthermore, the cross-sectional area of ​​the variable cross-sectional portion of the cross-sectional adjustment brick is 0 to 0.9 times the cross-sectional area of ​​the gas channel.

[0014] Furthermore, the cross-sectional shape of the fixed portion of the cross-sectional adjustment brick is trapezoidal, and the end connected to the variable cross-sectional portion is the small end; the innermost layer of refractory bricks corresponding to the fixed portion has a matching shape.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1) A cross-section adjustment brick is set in the gas channel connecting the heat recovery coke oven body and the flue gas duct. By changing the size of the variable cross-section part of the cross-section adjustment brick, the cross-sectional area of ​​the gas channel is changed, and the resistance in the corresponding gas channel and the suction force of the corresponding carbonization chamber are changed. Finally, the suction force of each carbonization chamber in the heat recovery coke oven group under the action of the fan is kept consistent, ensuring the continuous production of the heat recovery coke oven and the stable operation of the flue gas waste heat power generation system.

[0017] 2) Simple structure, easy to implement, convenient to operate and obvious effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of a heat recovery coke oven suction adjustment structure according to the present invention. Figure 1 .

[0019] Figure 2 This is a schematic diagram of a heat recovery coke oven suction adjustment structure according to the present invention. Figure 2 .

[0020] Figure 3 This is a schematic diagram of a heat recovery coke oven suction adjustment structure according to the present invention. Figure 3 .

[0021] In the figure: 1. Gas channel 2. Innermost refractory brick 3. Cross-section adjustment brick 4. Outer refractory brick DETAILED DESCRIPTION

[0022] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings:

[0023] like Figure 1 、 Figure 2 、 Figure 3 As shown, the heat recovery coke oven suction adjustment structure described in the present invention includes a gas channel 1 connecting the heat recovery coke oven body and the flue gas duct and a cross-section adjustment brick 3 arranged in the gas channel 1; the gas channel 1 is built with multiple layers of refractory bricks, and the cross-section adjustment brick 3 consists of a fixed part and a variable cross-section part, the fixed part is built in the innermost layer of refractory bricks 2, and the variable cross-section part is located in the gas channel 1; the machine side and the coke side of each carbonization chamber of the heat recovery coke oven are respectively provided with a gas channel 1; the cross-sectional dimensions of the variable cross-sectional parts of the cross-sectional adjustment bricks 3 in the gas channels 1 corresponding to different carbonization chambers are different; the cross-sectional dimensions of the variable cross-sectional parts of the cross-sectional adjustment bricks 3 in the two gas channels 1 corresponding to the same carbonization chamber are the same; the suction of each carbonization chamber of the heat recovery coke oven under the action of the fan is kept consistent through the arrangement of the cross-sectional adjustment bricks 3.

[0024] Furthermore, in the heat recovery coke oven, the cross-sectional size of the variable cross-sectional portion of the cross-sectional adjustment brick 3 in the gas passage 1 corresponding to each carbonization chamber gradually decreases from the end close to the fan to the end away from the fan.

[0025] Furthermore, the innermost refractory bricks 2 and the cross-section adjustment bricks 3 are both silica bricks.

[0026] Furthermore, the remaining refractory bricks in the gas channel 1 except the innermost refractory bricks 2, namely the outer refractory bricks 4, are clay bricks, floating bead bricks or insulation bricks.

[0027] Furthermore, the cross-sectional shape of the gas channel 1 is rectangular or circular.

[0028] Furthermore, the heat recovery coke oven body is connected to the flue gas duct via a riser, and a plurality of gas channels 1 are provided in the riser.

[0029] Furthermore, the cross-section adjustment bricks 3 are set when the heat recovery coke oven is cold-laid.

[0030] Furthermore, the cross-sectional area of ​​the variable cross-sectional portion of the cross-sectional adjustment brick 3 is 0 to 0.9 times the cross-sectional area of ​​the gas channel 1 .

[0031] Furthermore, the cross-sectional shape of the fixed portion of the cross-sectional adjustment brick 3 is trapezoidal, and the end connected to the variable cross-sectional portion is the small end; the innermost layer of refractory bricks 2 corresponding to the fixed portion has a matching shape.

[0032] The heat recovery coke oven suction adjustment structure of the present invention includes a gas channel 1 connecting the heat recovery coke oven body and the flue gas duct. The gas channel 1 is built with multiple layers of refractory bricks, and a cross-section adjustment brick 3 is arranged in the innermost layer of refractory bricks 2.

[0033] During implementation, the resistance and suction of each carbonization chamber in the heat recovery coke oven battery are calculated based on the relative position of each carbonization chamber and the fan. The cross-sectional dimensions of the cross-sectional adjustment bricks 3 are then designed. These bricks are used to adjust the cross-sectional area of ​​the gas passage 1, thereby adjusting the resistance of the gas passage 1 and the suction of the corresponding carbonization chamber. Ultimately, the suction of each carbonization chamber in the entire heat recovery coke oven battery, under the influence of the fan, remains consistent, ensuring continuous and stable production of the heat recovery coke ovens and stable operation of the flue gas waste heat power generation system.

[0034] The innermost refractory bricks 2 and cross-section adjustment bricks 3 of the gas channel 1 are preferably made of silica bricks, which can withstand long-term operation in a high-temperature exhaust gas environment and ensure the strength of the gas channel 1. The remaining outer refractory bricks 4 can be made of clay bricks, floating bead bricks, or insulation bricks. Insulation bricks include diatomite bricks, expanded razorite bricks, expanded perlite bricks, etc.

[0035] The cross-sectional shape of the gas channel 1 is preferably rectangular or circular.

[0036] The cross-section adjustment bricks 3 in the gas passages on both sides of the carbonization chamber of the same hole of the heat recovery coke oven are arranged in the same manner.

[0037] The cross-section adjustment bricks 3 are laid synchronously when the heat recovery coke oven is laid in a cold state, and the fixed ends of the cross-section adjustment bricks 3 are embedded in the innermost layer of refractory bricks 3 .

[0038] The following examples are implemented on the premise of the technical solution of the present invention, and provide detailed implementation methods and specific operating processes, but the protection scope of the present invention is not limited to the following examples.

[0039] [Example]

[0040] In this embodiment, the heat recovery coke oven suction regulating structure includes a riser connected between the heat recovery coke oven body and the flue gas duct. Three gas channels 1 are separated by refractory bricks in the riser, and the cross-section shape of the gas channels 1 is rectangular.

[0041] Each gas channel 1 is constructed of two layers of refractory bricks, the innermost layer of refractory bricks 2 being made of silica bricks, and the cross-section adjustment bricks 3 also being made of silica bricks. The outer layer of refractory bricks 4 being made of insulating bricks.

[0042] The cross-section adjustment brick 3 consists of a fixed portion and a variable cross-section portion. The fixed portion is built into the innermost layer of refractory bricks 2, while the variable cross-section portion extends into the gas channel 1. The cross-section of the fixed portion is trapezoidal, with the end connecting to the variable cross-section portion being the smaller end. The innermost layer of refractory bricks 2 corresponding to the fixed portion have a matching shape, allowing the fixed portion to be embedded in the innermost layer of refractory bricks 2. The variable cross-section portion has a rectangular cross-section.

[0043] Before the heat recovery coke oven is cold-laid, the resistance and suction of each carbonization chamber are calculated according to the different relative positions of each carbonization chamber and the fan in the same furnace group, and the specific cross-sectional dimensions of the variable cross-sectional parts of the cross-sectional adjustment bricks 3 corresponding to each carbonization chamber are designed. In this embodiment, the cross-sectional dimensions of the three gas channels 1 in each riser are the same, and the cross-sectional dimensions of the corresponding cross-sectional adjustment bricks 3 are also the same. The heat recovery coke oven includes 10 carbonization chambers. From the end close to the fan to the end away from the fan, the cross-sectional dimensions of the variable cross-sectional parts of the cross-sectional adjustment bricks in the gas channels of each carbonization chamber gradually decrease (such as Figure 3 、 Figure 2 、 Figure 1 As shown), where the minimum cross-sectional area is 0 (as shown Figure 1 As shown, the farthest end from the fan), the maximum cross-sectional area is 0.77 times the cross-sectional area of ​​gas channel 1 (as shown Figure 3 As shown, the one closest to the fan).

[0044] The cross-section adjustment bricks 3 on both sides of the coking chamber of the same hole of the heat recovery coke oven are arranged in the same manner.

[0045] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A heat recovery coke oven suction adjustment structure, characterized in that: It includes a gas channel connecting the heat recovery coke oven body and the flue gas duct and a cross-section adjusting brick arranged in the gas channel, the cross-section adjusting brick is set when the heat recovery coke oven is cold-laid; the gas channel is built with multiple layers of refractory bricks, and the cross-section adjusting brick consists of a fixed part and a variable cross-section part, the fixed part is built in the innermost layer of refractory bricks, and the variable cross-section part is located in the gas channel; gas channels are respectively provided on the machine side and the coke side of each carbonization chamber of the heat recovery coke oven; the cross-sectional dimensions of the variable cross-sectional parts of the cross-sectional adjusting bricks in the gas channels corresponding to different carbonization chambers are different, and the cross-sectional dimensions of the variable cross-sectional parts of the cross-sectional adjusting bricks in the gas channels corresponding to each carbonization chamber of the heat recovery coke oven gradually decrease from the end close to the fan to the end away from the fan; the cross-sectional dimensions of the variable cross-sectional parts of the cross-sectional adjusting bricks in the two gas channels corresponding to the same carbonization chamber are the same; the setting of the cross-sectional adjusting bricks makes the suction force of each carbonization chamber of the heat recovery coke oven under the action of the fan remain consistent.

2. A heat recovery coke oven suction adjustment structure according to claim 1, characterized in that: The innermost layer of refractory bricks and the cross-section adjustment bricks are both silica bricks.

3. The heat recovery coke oven suction adjustment structure according to claim 1, characterized in that: The refractory bricks in the gas channel except the innermost refractory bricks, that is, the outer refractory bricks, are clay bricks, floating bead bricks or insulation bricks.

4. The heat recovery coke oven suction adjustment structure according to claim 1, characterized in that: The cross-sectional shape of the gas channel is rectangular or circular.

5. The heat recovery coke oven suction adjustment structure according to claim 1, characterized in that: The heat recovery coke oven body is connected to the flue gas pipeline through a riser, and a plurality of gas channels are arranged in the riser.

6. The heat recovery coke oven suction adjustment structure according to claim 1, characterized in that: The cross-sectional area of ​​the variable cross-sectional portion of the cross-sectional adjustment brick is 0 to 0.9 times the cross-sectional area of ​​the gas channel.

7. The heat recovery coke oven suction adjustment structure according to claim 1, characterized in that: The cross-section shape of the fixed portion of the cross-section adjustment brick is trapezoidal, and the end connected to the variable cross-section portion is the small end; the innermost layer of refractory bricks at the corresponding fixed portion has a matching shape.

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