A double C-shaped horizontal fire channel structure of a heat recovery coke oven and its working method

Abstract

The invention relates to a double C-type horizontal fire channel structure of a heat recovery coke oven and a working method thereof. A plurality of secondary air inlets are respectively arranged at the lower parts of the sealing walls on the machine side and the coke side of the heat recovery coke oven. A longitudinal central partition wall is arranged below the carbonization chamber to divide the lower space of the carbonization chamber into two independent spaces. Each independent space is respectively composed of three horizontal fire channels to form a double C-type horizontal fire channel. The three horizontal fire channels are a middle fire channel, an intermediate fire channel and a side fire channel in order from the longitudinal central partition wall to the furnace wall. The middle fire channel and the intermediate fire channel are separated by an L-shaped partition wall, and the intermediate fire channel and the side fire channel are separated by a T-shaped partition wall. The invention can shorten the flow of smoke in the horizontal fire channel, reduce system resistance, improve air volume adjustment sensitivity, improve the controllability and uniformity of the temperature at the bottom of the carbonization chamber, shorten the coking time, reduce energy consumption, and improve production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of heat recovery coke ovens, and in particular to a double C-shaped horizontal fire channel structure of a heat recovery coke oven and a working method thereof. Background Art

[0002] At present, the horizontal fire channels of heat recovery coke ovens with six-link fire channel structure are mostly S-shaped horizontal fire channels, and the secondary air inlet is set at the bottom of the furnace. This six-link fire channel structure has the disadvantages of long flue gas flow, large system resistance, and insensitive air volume adjustment. The long flue gas flow and insensitive air volume adjustment make the temperature controllability of the horizontal fire channel of the heat recovery coke oven worse, the adjustment is complicated, and the temperature at the bottom of the carbonization chamber is uneven, which ultimately leads to uneven heating of coal cakes, resulting in prolonged coking time, high energy consumption, and reduced generation efficiency. Summary of the invention

[0003] The present invention provides a double C-type horizontal fire channel structure of a heat recovery coke oven and a working method thereof, which can shorten the flow of smoke in the horizontal fire channel, reduce system resistance, enhance the sensitivity of air volume regulation, enhance the controllability and uniformity of the temperature at the bottom of the carbonization chamber, shorten the coking time, reduce energy consumption, and improve production efficiency.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A heat recovery coke oven double C-shaped horizontal fire channel structure, wherein the furnace walls on both sides of the carbonization chamber 1 of the heat recovery coke oven are provided with ascending vertical fire channels and descending vertical fire channels, and 6 longitudinally arranged horizontal fire channels are arranged below the carbonization chamber; the lower parts of the sealing walls on the machine side and the coke side of the heat recovery coke oven are respectively provided with multiple secondary air inlets, and air inlet regulating devices are arranged at the secondary air inlets; a longitudinal central partition wall is arranged below the carbonization chamber to divide the lower space of the carbonization chamber into two independent spaces, and each independent space is composed of three horizontal fire channels to form double C-shaped horizontal fire channels; the ascending vertical fire channel and the descending vertical fire channel in the middle of the furnace wall are arranged at intervals, and the furnace wall is provided with multiple ascending vertical fire channels at one end close to the secondary air inlet, and multiple descending vertical fire channels are arranged at the other end; the three horizontal fire channels are respectively arranged as the middle fire channel, ... Fire channel and side fire channel; the middle fire channel and the intermediate fire channel are separated by an L-shaped partition wall, and the middle fire channel and the side fire channel are separated by a T-shaped partition wall; the middle fire channel is separated from the middle fire channel at one end close to the secondary air inlet, and is connected to the side fire channel through multiple connecting holes, and the middle fire channel is connected to the middle fire channel through multiple connecting holes at the other end away from the secondary air inlet; the middle fire channel is connected to the side fire channel through connecting holes at one end close to the secondary air inlet, and is directly connected to multiple rising vertical fire channels through connecting holes at the other end away from the secondary air inlet; multiple partition wall breaks are arranged in the longitudinal direction along the upper edge of the L-shaped partition wall, and the middle fire channel is connected to the middle fire channel through multiple partition wall breaks; the side fire channel is connected to the rising vertical fire channel, the descending vertical fire channel and the multiple descending vertical fire channels at one end of the furnace wall arranged at intervals in the middle of the corresponding side furnace wall.

[0006] A working method of a double C-type horizontal fire channel structure of a heat recovery coke oven comprises: the rich burn gas formed in a carbonization chamber enters a side fire channel from both sides of the carbonization chamber top space through descending vertical fire channels, flows along the side fire channels to one end of a sealing wall close to a secondary air inlet, and then respectively enters an intermediate fire channel and a middle fire channel through connecting holes on a T-shaped partition wall; the rich burn gas entering the middle fire channel is mixed and burned with the air entering from the secondary air inlet; the mixed gas is distributed through a plurality of partition wall fractures in the process of flowing along the middle fire channel, and is evenly mixed with the rich burn gas in the middle fire channel, so that the combustion is more complete; the smoke after complete combustion reaches one end of the sealing wall far away from the secondary air inlet, and then enters a plurality of ascending vertical fire channels; while the smoke flows in the double C-type horizontal fire channels, it transfers heat to the carbonization chamber through the partition wall at the bottom of the carbonization chamber; the amount of air entering the double C-type horizontal fire channel is adjusted by an air inlet adjustment device at the secondary air inlet, so as to ensure the complete combustion of the rich burn gas and prevent the increase of energy consumption due to excessive air.

[0007] Compared with the prior art, the present invention has the following beneficial effects:

[0008] 1) The longitudinal center partition wall is used to separate the six horizontal fire channels into two independent double C-shaped horizontal fire channels, which shortens the flow of smoke in the fire channel, reduces system resistance, and achieves energy-saving effect;

[0009] 2) The secondary air inlet of the heat recovery coke oven is arranged at the lower part of the sealing wall, so that the heat recovery coke oven has good overall sealing performance and high air volume adjustment sensitivity, which is conducive to the temperature adjustment of the horizontal fire channel.

[0010] 3) The flue gas flow is shortened and the air volume adjustment sensitivity is improved, which is beneficial to improve the controllability and uniformity of the temperature at the bottom of the carbonization chamber, shorten the coking time, reduce energy consumption, and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of a double C-shaped horizontal fire channel structure of a heat recovery coke oven described in the present invention.

[0012] Figure 2 yes Figure 1 A view in the figure.

[0013] Figure 3 yes Figure 1 BB section view in.

[0014] In the figure: 1. Carbonization chamber 2. Horizontal fire channel 21. 1# fire channel 22. 2# fire channel 23. 3# fire channel 24. 4# fire channel 25. 5# fire channel 26. 6# fire channel 3. Ascending vertical fire channel 4. Descending vertical fire channel 5. T-shaped partition wall 6. L-shaped partition wall 7. Secondary air inlet 8. Sealing wall 9. Longitudinal center partition wall 10. Partition wall fracture 11. Connecting port DETAILED DESCRIPTION

[0015] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings:

[0016] like Figure 1 , Figure 2As shown, the present invention discloses a double C-shaped horizontal fire channel structure for a heat recovery coke oven, wherein the furnace walls on both sides of the carbonization chamber 1 of the heat recovery coke oven are provided with ascending vertical fire channels 3 and descending vertical fire channels 4, and 6 longitudinally arranged horizontal fire channels 2 are arranged below the carbonization chamber 1; the lower parts of the sealing walls on the machine side and the coke side of the heat recovery coke oven are respectively provided with a plurality of secondary air inlets 7, and an air inlet regulating device is arranged at the secondary air inlet 7; a longitudinal central partition wall 9 is arranged below the carbonization chamber 1 to divide the lower space of the carbonization chamber 1 into two independent spaces, and each independent space is respectively composed of three horizontal fire channels 2 to form a double C-shaped horizontal fire channel; the ascending vertical fire channel 3 and the descending vertical fire channel 4 in the middle of the furnace wall are arranged at intervals, and the furnace wall is provided with a plurality of ascending vertical fire channels 3 at one end close to the secondary air inlet 7, and a plurality of descending vertical fire channels 4 at the other end. A descending fire channel 4; 3 horizontal fire channels 2 are respectively a central fire channel, an intermediate fire channel and a side fire channel from the longitudinal center partition wall 9 to the furnace wall; the central fire channel is separated from the intermediate fire channel by an L-shaped partition wall 6, and the intermediate fire channel is separated from the side fire channel by a T-shaped partition wall 5; the central fire channel is separated from the central fire channel at one end close to the secondary air inlet 7, and is connected to the side fire channel through a plurality of connecting holes 11, and the central fire channel is connected to the central fire channel at the other end away from the secondary air inlet 7 through a plurality of connecting holes 11; the intermediate fire channel is connected to the side fire channel at one end close to the secondary air inlet 7 through the connecting hole 11, and is directly connected to the plurality of ascending fire channels 3 at the other end away from the secondary air inlet 7 through the connecting hole 11; a plurality of partition wall breaks 10 (such as Figure 3 As shown), the middle fire channel is connected to the intermediate fire channel through multiple partition wall breaks 10; the side fire channel is connected to the rising vertical fire channel 3, the descending vertical fire channel 4 and the multiple descending vertical fire channels 4 at one end of the furnace wall arranged at intervals in the middle of the corresponding side furnace wall.

[0017] A working method of a double C-type horizontal fire channel structure of a heat recovery coke oven, comprising: the rich burn gas formed in a carbonization chamber 1 enters the side fire channels from both sides of the carbonization chamber top space through the descending vertical fire channels 4, flows along the side fire channels to one end of the sealing wall close to the secondary air inlet 7, and then respectively enters the middle fire channel and the central fire channel through the connecting holes 11 on the T-shaped partition wall 5; the rich burn gas entering the central fire channel is mixed and burned with the air entering from the secondary air inlet 7; the mixed gas is distributed through a plurality of partition wall fractures 10 in the process of flowing along the central fire channel, and is evenly mixed with the rich burn gas in the middle fire channel, so that the combustion is more complete; the smoke after complete combustion reaches one end of the sealing wall away from the secondary air inlet 7, and then enters a plurality of ascending vertical fire channels 3; while the smoke flows in the double C-type horizontal fire channels, it transfers heat to the carbonization chamber 1 through the partition wall at the bottom of the carbonization chamber 1; the amount of air entering the double C-type horizontal fire channels is adjusted by the air inlet adjustment device at the secondary air inlet 7, which not only ensures the complete combustion of the rich burn gas, but also prevents the increase of energy consumption due to excessive air.

[0018] The following examples are implemented on the premise of the technical solution of the present invention, and provide detailed implementation methods and specific operation processes, but the protection scope of the present invention is not limited to the following examples. The methods used in the following examples are conventional methods unless otherwise specified.

[0019] [Example]

[0020] In the present embodiment, six horizontal fire channels 2 are arranged below the carbonization chamber 1 of the heat recovery coke oven, a plurality of ascending vertical fire channels 3 and a plurality of descending vertical fire channels 4 are arranged in the furnace walls on both sides of the carbonization chamber 1, secondary air inlets 7 are arranged at the lower part of the sealing wall 8 on the machine side or the coke side, and an air inlet regulating device is arranged at the secondary air inlet 7; a longitudinal central partition wall 9 is arranged in the horizontal fire channel 2 to divide the lower space of the carbonization chamber 1 where the horizontal fire channel 2 is located into two independent spaces, and the three horizontal fire channels 2 in each independent space respectively constitute a double C-shaped horizontal fire channel.

[0021] In this embodiment, the two double C-shaped horizontal fire channels are respectively composed of three horizontal fire channels 2 arranged in parallel, namely, 1# to 3# fire channels 21 to 23 and 4# to 6# fire channels 24 to 26; among which the 3# fire channel 23 and the 4# fire channel 24 close to the longitudinal center partition wall 9 are middle fire channels, and the 1# fire channel 21 and the 6# fire channel 26 close to the furnace wall of the carbonization chamber 1 are side fire channels; the 1# fire channel 21 and the 6# fire channel 26 are respectively connected to the rising vertical fire channel 3 and the descending vertical fire channel 4 arranged at intervals in the middle of the furnace wall; the 2# fire channel 22 located between the 1# fire channel 21 and the 3# fire channel 23 is the middle fire channel, and the airflow direction in the 2# fire channel 22 is the same as that in the 3# fire channel. The airflow direction in the #fire channel 23 is the same as that in the 1#fire channel 21; the 5#fire channel 25 located between the 4#fire channel 24 and the 6#fire channel 26 is the middle fire channel, and the airflow direction in the 5#fire channel 25 is the same as that in the 4#fire channel 24, and is opposite to that in the 6#fire channel 26; a plurality of partition wall breaks 10 are provided on the L-shaped partition wall 6 between the 2#fire channel 22 and the 3#fire channel 23; a plurality of partition wall breaks 10 are provided on the L-shaped partition wall 6 between the 5#fire channel 25 and the 4#fire channel 24; two secondary air inlets 7 are provided at the lower part of the sealing wall 8 on the machine side, and two are provided at the lower part of the sealing wall 8 on the coke side.

[0022] like Figure 1As shown, one way between the multiple ascending vertical fire channels 3 and the multiple descending vertical fire channels 4 at both ends of the furnace wall on one side of the carbonization chamber 1 is connected end to end through the 1# fire channel 21, the 2# fire channel 22 and the connecting holes 11 at both ends of the T-shaped partition wall 5, and the other way is connected end to end through the 1# fire channel 21, the 2# fire channel 22, the 3# fire channel 23, the connecting holes 11 at both ends of the T-shaped partition wall 5 and the connecting holes 11 at one end of the L-shaped partition wall 6, thereby forming a double C-shaped horizontal fire channel; similarly, one way between the multiple ascending vertical fire channels 3 and the multiple descending vertical fire channels 4 at both ends of the furnace wall on the other side of the carbonization chamber 1 is connected end to end through the 6# fire channel 26, the 5# fire channel 25 and the connecting holes 11 at both ends of the T-shaped partition wall 5, and the other way is connected end to end through the 6# fire channel 26, the 5# fire channel 25, the 4# fire channel 24, the connecting holes 11 at both ends of the T-shaped partition wall 5 and the connecting holes 11 at one end of the L-shaped partition wall 6, thereby forming a double C-shaped horizontal fire channel.

[0023] In this embodiment, the working method of the double C-type horizontal fire channel of the heat recovery coke oven is as follows: the rich fuel gas formed in the carbonization chamber 1 enters the 1# fire channel 21 and the 6# fire channel 26 respectively from both sides of the furnace top space of the carbonization chamber 1 through multiple descending vertical fire channels 4, and after the airflow turns, it is mixed and burned with the air entering from the secondary air inlet 7 at the furnace head position on the corresponding machine side or coke side. During the flow of the mixed gas in the 3# fire channel 23 and the 4# fire channel 24, it is distributed through the partition wall fracture 10 and mixed evenly with the rich fuel gas in the adjacent 2# fire channel and the 5# fire channel, so that the combustion is more complete; the flue gas after sufficient combustion flows to the furnace head position away from the end of the secondary air inlet 7 and then enters the multiple ascending vertical fire channels 3; while the flue gas flows in the double C-type horizontal fire channels, it transfers heat to the carbonization chamber 1 through the partition wall at the bottom of the carbonization chamber 1; the amount of air entering the double C-type horizontal fire channel is adjusted by the air inlet adjustment device at the secondary air inlet 7, which not only ensures the complete combustion of the rich fuel gas, but also prevents the increase of energy consumption due to excessive air.

[0024] The above description 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 replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A double C-shaped horizontal fire channel structure of a heat recovery coke oven, wherein the furnace walls on both sides of the carbonization chamber of the heat recovery coke oven are provided with ascending vertical fire channels and descending vertical fire channels, and 6 longitudinally arranged horizontal fire channels are provided below the carbonization chamber; characterized in that: A plurality of secondary air inlets are respectively arranged at the lower part of the sealing wall on the heat recovery coke oven machine side and the coke side, and an air inlet regulating device is arranged at the secondary air inlet; a longitudinal central partition wall is arranged below the carbonization chamber to divide the lower space of the carbonization chamber into two independent spaces, and each independent space is composed of three horizontal fire channels and a double C-shaped horizontal fire channel; the ascending vertical fire channel and the descending vertical fire channel in the middle of the furnace wall are arranged at intervals, and a plurality of ascending vertical fire channels are arranged at one end of the furnace wall close to the secondary air inlet, and a plurality of descending vertical fire channels are arranged at the other end; the three horizontal fire channels are respectively the middle fire channel, the middle fire channel and the side fire channel from the longitudinal central partition wall to the furnace wall; the middle fire channel and the middle fire channel are separated by an L-shaped partition wall, and the middle fire channel and the side fire channel are separated by an L-shaped partition wall. The fire channels are separated by T-shaped partition walls; the middle fire channel is separated from the middle fire channel at one end close to the secondary air inlet, and is connected to the side fire channel through multiple connecting holes, and the middle fire channel is connected to the middle fire channel through multiple connecting holes at the other end away from the secondary air inlet; the middle fire channel is connected to the side fire channel through connecting holes at one end close to the secondary air inlet, and is directly connected to multiple rising vertical fire channels through connecting holes at the other end away from the secondary air inlet; multiple partition wall breaks are arranged in the longitudinal direction along the upper edge of the L-shaped partition wall, and the middle fire channel is connected to the middle fire channel through multiple partition wall breaks; the side fire channel is connected to the rising vertical fire channel, the descending vertical fire channel and the multiple descending vertical fire channels at one end of the furnace wall arranged at intervals in the middle of the corresponding side furnace wall.

2. A method for operating a heat recovery coke oven double C-shaped horizontal fire channel structure as claimed in claim 1, characterized in that: include: The rich fuel gas formed in the carbonization chamber enters the side fire channel through the descending vertical fire channels from both sides of the carbonization chamber top space, flows along the side fire channel to one end of the sealing wall close to the secondary air inlet, and then enters the middle fire channel and the central fire channel respectively through the connecting holes on the T-shaped partition wall. The rich fuel gas entering the central fire channel is mixed with the air entering from the secondary air inlet and burned. The mixed gas is distributed through multiple partition wall fractures in the process of flowing along the central fire channel, and is evenly mixed with the rich fuel gas in the middle fire channel, so that the combustion is more complete; the flue gas after full combustion reaches one end of the sealing wall far away from the secondary air inlet, and then enters multiple ascending vertical fire channels; while the flue gas flows in the double C-type horizontal fire channel, it transfers heat to the carbonization chamber through the partition wall at the bottom of the carbonization chamber; the amount of air entering the double C-type horizontal fire channel is adjusted by the air inlet regulating device at the secondary air inlet, which not only ensures the complete combustion of the rich fuel gas, but also prevents the increase of energy consumption due to excessive air.

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