Adjustable pressure coke oven brick gas channel

Abstract

The utility model discloses a coke oven brick gas channel of adjustable pressure relates to coke oven technical field, a coke oven brick gas channel of adjustable pressure, including a plurality of combustion chamber, the both sides of combustion chamber are equipped with furnace wall respectively, and the carbonization chamber is equipped between every two combustion chambers respectively, and the passage is equipped between every adjacent two carbonization chambers, and the inside of passage is equipped with gate, and the both sides of gate are equipped with the remote pressure detector of fixed connection with furnace wall, and the upper end of combustion chamber is equipped with a plurality of fire hole along its long side, and the gate is correspondingly transmission connection with the actuating mechanism, and the passage is set up and makes two carbonization chambers communicate through the passage, when carbonization chamber adds coal, and the adjacent communication carbonization chamber is in the coking middle period, and the gas generation amount is less correspondingly, and the coal dust, the smoke dust and the replacement air etc.

Description

Technical Field

[0001] This utility model relates to the field of coke oven technology, specifically to an adjustable pressure coke oven brick gas duct. Background Technology

[0002] The uppermost part of a modern coke oven is the roof, below which are alternating combustion chambers and carbonization chambers. The lower part of the oven body contains regenerators and an inclined flue area connecting the regenerators and combustion chambers. Small flues at the bottom of each regenerator are connected to the flue via exchange switches. The flues are located within or on either side of the coke oven foundation, with their ends leading to the chimney. Therefore, a coke oven consists of three chambers and two areas: the carbonization chamber, combustion chamber, regenerator, inclined flue area, roof area, and the foundation. The combustion chambers are located on either side of the carbonization chamber and consist of multiple vertical flues. The regenerators are located in the lower part of the oven body and are divided into air regenerators and gas regenerators.

[0003] In the combustion chamber, every two vertical flues form a pair of double vertical flues (referred to as the ascending flue and the descending flue, respectively), carrying ascending and descending airflows. Each pair of double vertical flues has a crossing hole at the top and an exhaust gas recirculation hole at the bottom, connecting the two flues. The combustion air and coal gas entering the vertical flues from the bottom undergo diffusion combustion to form an ascending airflow. This ascending airflow enters the descending flue through the crossing hole and becomes a descending airflow. The descending airflow then enters the ascending airflow through the exhaust gas recirculation hole at the bottom of the flue to participate in the circulation.

[0004] With the transformation of modern production methods, higher requirements have been placed on coke ovens, such as large production capacity, low resistance in the heating system, convenient adjustment and control, and low nitrogen and environmental protection. At present, most of the large-scale bottom-injection coke ovens in my country are top-loading coke ovens with single gas collection pipes located on the side of the coke oven machine. In order to improve the phenomenon of smoke and fire during coal charging and meet environmental protection requirements, high-pressure ammonia water spraying and dedicated smoke and dust removal devices are often used. However, there is still room for improvement in suppressing coal charging smoke and dust. Utility Model Content

[0005] To address the above problems, this utility model provides an adjustable pressure coke oven brick gas duct, thus solving the aforementioned issues.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an adjustable pressure coke oven brick gas duct, comprising multiple combustion chambers, furnace walls on both sides of each combustion chamber, carbonization chambers between each pair of combustion chambers, a channel between each pair of adjacent carbonization chambers, a gate plate inside the channel, remote pressure detectors fixedly connected to the furnace walls on both sides of the gate plate, multiple fire observation holes along the long side of the upper end of each combustion chamber, and an actuator correspondingly connected to the gate plate.

[0007] Preferably, the gate includes an outer frame and a gate, a cylindrical column is fixed in the center of the gate, the cylindrical column is rotatably connected to the outer frame, sealing plates are respectively provided at the front and rear ends of the gate and fixedly connected to the outer frame, a first bevel gear is fixed at the upper end of the cylindrical column, a second bevel gear is driven by the first bevel gear, a drive shaft is fixed on the second bevel gear, and the drive shaft is driven by the actuator.

[0008] Preferably, the sealing plate is arc-shaped, the left and right ends of the gate are semi-circular, and the sealing plate is fitted to both ends of the gate.

[0009] Preferably, the gate includes a sealing plate, clamps, and a sealing door. A cylindrical column is fixed in the center of the sealing plate. Two clamps are provided and fixed at the front and rear ends of the sealing plate, with a gap between the two clamps. The sealing door is located between the two clamps and is slidably connected to the cylindrical column. A rack is provided on the sealing door. A drive shaft is rotatably connected to the sealing plate. A spur gear that is driven by the rack is fixed on the drive shaft. The drive shaft is driven by the actuator.

[0010] Preferably, the gate includes a sealing plate, with U-shaped plates fixed at its front and rear ends respectively. Two symmetrical sliding doors are provided between the two U-shaped plates, with two symmetrical pulleys at the lower ends of the sliding doors. The sealing plate is provided with a track corresponding to the pulleys, and a cylindrical column is fixed in the center of the sealing plate. The cylindrical column is connected to the fire observation hole.

[0011] Preferably, the upper end of the movable door is fixed with a fixing block, the upper end of the sealing plate is provided with two symmetrical through grooves, the fixing block slides in the through grooves, and two symmetrical double-headed screws are connected to the fixing block for transmission. The actuator drives the two double-headed screws to rotate synchronously and causes the two fixing blocks to move relative to or away from each other.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. The coke oven should be designed with two or three adjacent carbonization chambers connected by a reasonable coke-side furnace head channel. When coal is added to a carbonization chamber, the adjacent connected carbonization chamber is in the middle stage of coking, and the amount of gas generated is relatively small. Coal dust, smoke, and displaced air raised during coal addition can enter the adjacent carbonization chambers in the same group through the channel, effectively mitigating the problem of sudden pressure increases and smoke / fire leakage during coal addition, and stabilizing the overall pressure of the carbonization chamber.

[0014] 2. By setting up coke side furnace head channels for two adjacent carbonization chambers, when one carbonization chamber is processing coal in the early stage of coking, another one or two carbonization chambers in the same group are processing coal in the middle stage of coking. Since the amount of gas generated at these two coking times is very different, they can buffer each other, effectively improving the situation of smoke and fire during production.

[0015] 3. The passage connects two adjacent carbonization chambers. When one carbonization chamber is processing coal in the early stage of coking, the other carbonization chamber in the same group is processing it in the middle stage of coking. Since the amount of gas generated at these two coking times is very different, it can buffer the gas pressure on the coke side of the carbonization chamber, greatly reducing the amount of gas leaking from the coke side to the vertical flue in the coke head area, eliminating the phenomenon of graphite buildup in the observation holes of the vertical flue in the coke head, and improving the operation of the coke oven heating system.

[0016] 4. Collect carbonization chamber pressure data through the channel, control the opening of the gate, control the carbonization chamber pressure, reduce coke oven smoke and fire, and graphite buildup in the vertical flue of the furnace head area, improve the operating environment and environmental protection quality, reduce product loss, and extend the service life of the coke oven. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a partial cross-sectional view of the present invention;

[0019] Figure 3 This is a schematic diagram of the gate of this utility model. Figure 1 ;

[0020] Figure 4 This is a schematic diagram of the gate of this utility model. Figure 2 ;

[0021] Figure 5 This is a schematic diagram of the gate of this utility model. Figure 3 ;

[0022] Figure 6 This is a schematic diagram of the gate of this utility model. Figure 4 ;

[0023] Figure 7 This is a schematic diagram of the gate of this utility model. Figure 5 ;

[0024] Figure 8 This is a schematic diagram of the gate of this utility model. Figure 6 .

[0025] The diagram shows the following labels: 1. Combustion chamber; 2. Furnace wall; 3. Carbonization chamber; 4. Inspection hole; 5. Remote pressure detector; 6. Actuator; 7. Channel; 71. Outer frame; 72. Gate; 73. Sealing plate; 74. Cylindrical column; 75. First bevel gear; 76. Second bevel gear; 77. Drive shaft; 721. Clamping plate; 722. Sealing door; 723. Rack; 771. Spur gear; 731. Through groove; 732. Fixing block; 733. Double-ended screw; 7211. U-shaped plate; 7212. Sliding door; 7213. Track; 7214. Pulley. Detailed Implementation

[0026] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0027] Please see Figure 1 and Figure 2 An adjustable pressure coke oven brick gas duct includes multiple combustion chambers 1, with furnace walls 2 on both sides of each combustion chamber 1. Carbonization chambers 3 are located between each pair of combustion chambers 1. A coal feeding hole is located at the upper end of each carbonization chamber 3. A channel 7 is provided between each pair of adjacent carbonization chambers 3. A gate is installed inside the channel 7, and remote pressure detectors 5, fixedly connected to the furnace walls 2, are installed on both sides of the gate. Each carbonization chamber 3 is a rectangular space adjacent to the combustion chambers 1. Each carbonization chamber 3 has two combustion chambers 1 on both sides (excluding the side furnaces). Each combustion chamber 1 is composed of multiple vertical flues, with each pair of vertical flues forming a [missing information - likely a specific type of combustion chamber]. The double-connected vertical flue is connected at the top through a cross-through hole and at the bottom through a waste gas circulation hole. Each vertical flue has a rich coal gas brick gas duct, a lean coal gas bottom outlet, and a combustion air bottom outlet at the bottom. The vertical flue partition wall has multiple combustion air outlets and multiple lean coal gas outlets along the height. The furnace head connecting hole of the carbonization chamber 3 is a channel 7 connecting two or three adjacent carbonization chambers 3 on the coke side of the coke oven. Each group of two or three adjacent carbonization chambers 3 is provided with one or two channels 7. The channel 7 connecting two or three adjacent carbonization chambers 3 on the coke side of the coke oven is a channel 7 opened between two carbonization chambers 3 on the furnace head side from above the coal line to the top of the carbonization chamber 3.

[0028] The carbonization chamber 3 is connected to an external intelligent pressure control platform. This platform includes a high-temperature resistant gate, a coke-side furnace head channel 7 for the carbonization chamber 3, a PLC controller, a main unit, a display, connecting cables, and software. Multiple observation holes 4 are provided along the long side of the upper end of the combustion chamber 1. These observation holes 4 are used to observe the internal conditions of the combustion chamber 1 and control the temperature accordingly. An actuator 6 is correspondingly connected to the gate. Two or three adjacent coke-side furnace head channels 7 are strategically positioned to connect the two carbonization chambers 3. When coal is added to the carbonization chamber 3, the adjacent connected carbonization chambers 3 are in the middle stage of coking, resulting in a relatively small amount of coal gas. Coal dust, smoke, and displaced air generated during coal addition to the carbonization chamber 3 can enter the adjacent carbonization chambers 3 in the same group through the channel 7. This effectively mitigates the problem of sudden pressure increases and smoke / fire emissions during coal addition to the carbonization chamber 3, ensuring overall pressure stability in the carbonization chamber 3.

[0029] By setting up coke side furnace head channels 7 for two adjacent carbonization chambers 3, when one carbonization chamber 3 is processing coal in the early stage of coking, another or two carbonization chambers 3 in the same group are processing coal in the middle stage of coking. Since the amount of coal gas generated at these two coking times is very different, they can buffer each other, which can effectively improve the situation of smoke and fire during production.

[0030] The passage 7 connects two adjacent carbonization chambers 3. When one carbonization chamber 3 is in the early stage of coking, the other carbonization chamber 3 in the same group is in the middle stage of coking. Because the amount of gas generated at these two coking times is very different, it can buffer the gas pressure on the coke side of the carbonization chamber 3, which greatly reduces the amount of gas leaking from the coke side to the vertical flue of the coke head area, eliminates the phenomenon of graphite deposits on the observation hole 4 of the vertical flue of the coke head, and improves the operation of the coke oven heating system.

[0031] The pressure data of carbonization chamber 3 is collected through channel 7, the opening of the gate is controlled, the pressure of carbonization chamber 3 is controlled, the smoke and fire of coke oven are reduced and the graphite accumulation in the vertical flue of the furnace head area is reduced, the operating environment and environmental protection quality are improved, product loss is reduced and the service life of coke oven is extended.

[0032] Example 1:

[0033] Please see Figure 3 and Figure 4The gate includes an outer frame 71 and a gate 72. A cylindrical column 74 is fixed in the center of the gate 72, and the cylindrical column 74 is rotatably connected to the outer frame 71. Sealing plates 73, which are fixedly connected to the outer frame 71, are respectively provided at the front and rear ends of the gate 72. A first bevel gear 75 is fixed at the upper end of the cylindrical column 74. The first bevel gear 75 is driven by a second bevel gear 76. A drive shaft 77 is fixed on the second bevel gear 76. The drive shaft 77 is driven by an actuator 6. When the pressure of two adjacent carbonization chambers 3 is adjusted, the actuator 6 drives the drive shaft 77 to rotate, which is driven by the first bevel gear 74. The engagement of the 5th and the second bevel gear 76 drives the cylinder 74 to rotate. The cylinder 74 is fixedly connected to the gate 72 and rotatably connected to the outer frame 71, thereby driving the gate 72 to select and connect the two adjacent carbonization chambers 3, adjusting the pressure of the carbonization chamber 3. At the same time, the cylinder 74 corresponds to the observation hole 4, without affecting the observation of the situation in the combustion chamber 1. The sealing plate 73 is arc-shaped, and the left and right ends of the gate 72 are semi-circular. The sealing plate 73 fits against the two ends of the gate 72. The semi-circular left and right ends of the gate 72 and the arc-shaped sealing plate 73 ensure the sealing between the two carbonization chambers 3.

[0034] Example 2:

[0035] Please see Figure 5 and Figure 6 The gate includes a sealing plate 73, clamping plates 721, and a sealing door 722. A cylindrical column 74 is fixed to the center of the sealing plate 73. Two clamping plates 721 are provided and fixed at the front and rear ends of the sealing plate 73, with a gap between the two clamping plates 721. The sealing door 722 is located between the two clamping plates 721 and is slidably connected to the cylindrical column 74. A rack 723 is provided on the sealing door 722. A drive shaft 77 is rotatably connected to the sealing plate 73. A spur gear 771, which is driven by the rack 723, is fixed on the drive shaft 77. The drive shaft 77 is driven by the actuator 6. When the pressure of two adjacent carbonization chambers 3 is adjusted, the actuator 6 drives the transmission shaft 77 to rotate, and the spur gear 771 fixed on the transmission shaft 77 rotates accordingly. Since the spur gear 771 cooperates with the rack 723, the sealing door 722 is raised after the transmission shaft 77 rotates and enters between the two clamping plates 721, thereby connecting the two adjacent carbonization chambers 3. The cylinder 74 is slidably connected to the sealing door 722, guiding the sealing door 722 as it rises, so that the sealing door 722 can rise smoothly. At the same time, when closing, the channel 7 can be quickly closed by the weight of the sealing door 722 itself.

[0036] Example 3:

[0037] Please see Figure 7 and Figure 8 The gate includes a sealing plate 73, with U-shaped plates 7211 fixed at its front and rear ends. Two symmetrical sliding doors 7212 are positioned between the two U-shaped plates 7211. Two symmetrical pulleys 7214 are located at the lower ends of each sliding door 7212. A track 7213 corresponding to the pulleys 7214 is provided on the sealing plate 73. A cylindrical column 74 is fixed in the center of the sealing plate 73, communicating with the fire viewing hole 4. Fixing blocks 732 are fixed at the upper ends of each sliding door 7212. Two symmetrical through slots 731 are formed at the upper end of the sealing plate 73, allowing the fixing blocks 732 to slide within them. Two symmetrical double-ended screws 7 are connected to the fixing blocks 732 via a transmission mechanism. 33. The actuator 6 drives the two double-headed screws 733 to rotate synchronously and causes the two fixed blocks 732 to move relative to or away from each other. When adjusting the pressure of two adjacent carbonization chambers 3, the actuator 6 drives the two double-headed screws 733 to rotate synchronously, thereby causing the two fixed blocks 732 to move away from each other, which in turn causes the two moving doors 7212 to move away from each other, so that the two moving doors 7212 enter the two U-shaped plates 7211 and connect the two adjacent carbonization chambers 3. At the same time, the track 7213 and pulley 7214 cooperate to make the two moving doors 7212 move easily. The side of the moving door 7212 near the cylinder 74 is arc-shaped, which makes it easy for the moving door 7212 to fit with the cylinder 74 when the channel 7 is closed, ensuring the airtightness.

[0038] During normal production, when a certain carbonization chamber 3 is being pushed with coke or charged with coal, the adjacent carbonization chamber 3 is in a period of agglomeration and is in an expanded state. This effectively supports the compression of the furnace wall 2 during coke pushing and coal charging, protecting the furnace wall. The amount of coal gas generated is correspondingly reduced and becomes more uniform and stable. However, during the coal charging process in the top-charging coke oven, the coal compresses the high-temperature gas in the carbonization chamber 3, causing the pressure in the carbonization chamber 3 to rise instantaneously. A large amount of gas can only be introduced into the gas collecting pipe through the riser pipe on the machine side. Since there is no outlet device on the coke side, the pressure on the coke side rises instantaneously, several times or even tens of times higher than during normal production. On the one hand, this causes a large amount of fine coal powder and carbon dust after high-temperature carbonization of fine coal powder to emerge through the coal feeding hole with the compressed gas. On the other hand, it causes fine coal powder to leak with the gas to the coke side furnace head and be subjected to instantaneous high pressure. In the affected area of ​​the flue, fine coal powder decomposes upon heating, releasing tar gas which condenses into droplets at the upper observation hole 4. These droplets adhere to the upper observation hole 4 of the furnace head vertical flue, generating graphite. When the observation hole cover of the furnace head vertical flue is opened, the graphite comes into contact with air, causing instantaneous oxidation and the emission of a large amount of black smoke. This severely affects the operation and environmental protection of the coke oven, as well as its lifespan. By connecting two adjacent carbonization chambers and installing a gate, along with a remote pressure detector 5, actuator 6, PLC controller, main unit, display, connecting cables, and software system, the opening of the gate connecting the carbonization chamber 3 can be controlled automatically and precisely in real time. This allows the high-pressure gas from the coke side of carbonization chamber 3 to be introduced into the adjacent carbonization chamber 3, stabilizing the pressure in carbonization chamber 3 and preventing smoke and fire caused by high pressure in carbonization chamber 3. This achieves green and environmentally friendly coke oven production.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An adjustable pressure coke oven brick gas duct, characterized in that: It includes multiple combustion chambers (1), with furnace walls (2) on both sides of each combustion chamber (1), carbonization chambers (3) between each pair of combustion chambers (1), and a channel (7) between each pair of adjacent carbonization chambers (3). A gate is provided inside the channel (7), and a remote pressure detector (5) is fixedly connected to the furnace wall (2) on both sides of the gate. Multiple fire viewing holes (4) are provided along the long side of the upper end of each combustion chamber (1), and an actuator (6) is correspondingly connected to the gate.

2. The adjustable pressure coke oven brick gas duct according to claim 1, characterized in that: The gate includes an outer frame (71) and a gate (72). A cylindrical column (74) is fixed in the center of the gate (72). The cylindrical column (74) is rotatably connected to the outer frame (71). Sealing plates (73) are fixedly connected to the outer frame (71) at the front and rear ends of the gate (72). A first bevel gear (75) is fixed at the upper end of the cylindrical column (74). A second bevel gear (76) is driven by the first bevel gear (75). A drive shaft (77) is fixed on the second bevel gear (76). The drive shaft (77) is driven by the actuator (6).

3. The adjustable pressure coke oven brick gas duct according to claim 2, characterized in that: The sealing plate (73) is arc-shaped, and the left and right ends of the gate (72) are semi-circular. The sealing plate (73) is attached to both ends of the gate (72).

4. The adjustable pressure coke oven brick gas duct according to claim 1, characterized in that: The gate includes a sealing plate (73), a clamping plate (721), and a sealing door (722). A cylindrical column (74) is fixed in the center of the sealing plate (73). Two clamping plates (721) are provided and fixed at the front and rear ends of the sealing plate (73). There is a gap between the two clamping plates (721). The sealing door (722) is located between the two clamping plates (721). The sealing door (722) is slidably connected to the cylindrical column (74). A rack (723) is provided on the sealing door (722). A drive shaft (77) is rotatably connected to the sealing plate (73). A spur gear (771) is fixed on the drive shaft (77) and is connected to the rack (723). The drive shaft (77) is connected to the actuator (6).

5. The adjustable pressure coke oven brick gas duct according to claim 1, characterized in that: The gate includes a sealing plate (73), and U-shaped plates (7211) are fixed at the front and rear ends of the sealing plate (73). Two symmetrical sliding doors (7212) are provided between the two U-shaped plates (7211). Two symmetrical pulleys (7214) are provided at the lower end of the sliding doors (7212). The sealing plate (73) is provided with a track (7213) corresponding to the pulleys (7214). A cylindrical column (74) is fixed in the center of the sealing plate (73). The cylindrical column (74) is connected to the fire observation hole (4).

6. The adjustable pressure coke oven brick gas duct according to claim 5, characterized in that: The upper end of the movable door (7212) is fixed with a fixing block (732), and the upper end of the sealing plate (73) has two symmetrical through grooves (731). The fixing block (732) slides in the through groove (731). The fixing block (732) is connected to two symmetrical double-headed screws (733). The actuator (6) drives the two double-headed screws (733) to rotate synchronously and makes the two fixing blocks (732) move relative to each other or away from each other.

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