Underground flue drainage structure of coke oven

Abstract

The utility model relates to a coke oven underground flue drainage structure, including underground flue, be located underground flue below's sump and be located water pump on the ground, underground flue inner bottom is inverted conical and its lowest place is communicated with sump top through downcomer, underground flue top of downcomer correspondence is equipped with hydraulic cylinder, hydraulic cylinder piston rod is downwards fixed link has inverted V baffle, baffle's front and back two sides butt on underground flue's front and back two sides inner wall, bottom can butt on underground flue's inner bottom of downcomer left and right two sides, sump's inner top is equipped with liquid level sensor, bottom is communicated with the drain pipe with solenoid valve, ground is equipped with control center and preprocessing mechanism, hydraulic cylinder, liquid level sensor, solenoid valve and water pump all are connected with control center electrically, preprocessing mechanism's water inlet end and drain pipe tail end communication, water outlet and water pump's water inlet communication, the utility model can shield downcomer and can carry out effective preprocessing to the condensate when draining, more practical.

Description

Technical Field

[0001] This utility model belongs to the field of drainage technology, specifically relating to a drainage structure for underground flue gas ducts of coke ovens. Background Technology

[0002] The underground flue of a coke oven typically refers to a section of the flue located underground or near the ground. Its main function is to discharge the flue gas generated by the coke oven, ensuring its smooth exit and entry into subsequent treatment systems. However, during actual flue gas discharge, moisture in the flue gas easily condenses into water in low-temperature areas. If not drained promptly, this moisture accumulates, forming scale or clogging the flue and hindering gas flow. Therefore, underground flue gas systems require drainage structures. Common drainage structures include condensate tanks located below and connected to the flue. These tanks collect condensate from the flue, and once a certain amount is accumulated, it is pumped out to subsequent treatment processes for purification. However, in practice, condensate pumping often results in flue gas mixing, and the lack of pretreatment of the condensate significantly impacts subsequent equipment and hinders condensate treatment, requiring improvement. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a drainage structure for underground flue of coke ovens, which can block the drain pipe during drainage and effectively pre-treat condensate to solve the above problems.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a drainage structure for an underground flue of a coke oven, comprising an underground flue, a water collection pool located below the underground flue, and a water pump located above ground. The bottom of the underground flue is inverted conical, and its lowest point is connected to the top of the water collection pool via a drain pipe. A hydraulic cylinder is fixedly installed at the top of the underground flue corresponding to the drain pipe. The piston rod of the hydraulic cylinder faces downward and is fixedly connected to an inverted V-shaped baffle. The front and rear sides of the baffle abut against the inner walls of the front and rear sides of the underground flue, and the bottom can abut against the bottom of the underground flue on the left and right sides of the drain pipe. A liquid level sensor is installed on the top of the water collection pool, and a drain pipe with a solenoid valve is connected to the bottom. A control center and a pretreatment mechanism are provided above ground. The hydraulic cylinder, liquid level sensor, solenoid valve, and water pump are all electrically connected to the control center. The inlet end of the pretreatment mechanism is connected to the tail end of the drain pipe, and the outlet end is connected to the inlet of the water pump.

[0005] Preferably, the baffle is provided with sealing gaskets at the bottom and on both the front and rear sides.

[0006] Preferably, the drain pipe is equipped with a one-way valve.

[0007] Preferably, the pretreatment mechanism includes a vertically arranged support, with an inlet channel at the bottom and an outlet channel at the top. The inlet channel is connected to the end of a drain pipe, and the outlet channel is connected to the inlet of a water pump. Inlet branch pipes are fixedly connected to both sides of the inlet channel, and outlet branch pipes are fixedly connected to both sides of the outlet channel. Control valves are provided on both the inlet and outlet branch pipes. Movable pretreatment boxes are provided on both sides of the support. The lower part of the pretreatment box is detachably connected to the inlet branch pipe on the same side, and the upper part is detachably connected to the outlet branch pipe on the same side. Two filter screens are fixedly arranged vertically in the middle of the pretreatment box, with the lower filter screen having a larger pore size than the upper filter screen. Activated carbon is filled between the two filter screens.

[0008] Preferably, the ends of the inlet branch pipe and the outlet branch pipe are fixedly connected to flexible hoses, and the flexible hoses are connected to the lower or upper part of the corresponding pretreatment tank through quick connectors.

[0009] Preferably, the pretreatment box is fixed on a movable base, and braked casters are installed at the four corners of the bottom of the movable base.

[0010] The beneficial effects of this invention are as follows: Water condensed during the exhaust process in the underground flue can automatically flow under the action of the inclined surface at the bottom of the underground flue and be temporarily stored in a sump via a drain pipe. During this process, a level sensor monitors the water level in the sump in real time and feeds it back to the control center. When the water level exceeds the set upper limit, the control center automatically controls the hydraulic cylinder to extend its piston rod, causing the baffle to move downwards until it presses against the bottom of the underground pipe, blocking the upper end of the drain pipe. Then, the control center automatically opens the solenoid valve and runs the water pump to pump out the accumulated condensate in the sump. Furthermore, because the baffle blocks the upper end of the drain pipe, it effectively prevents the flowing flue gas from being extracted, thus preventing the flue gas from adversely affecting subsequent condensate transport and treatment equipment. Condensate pumped out through the drain pipe can first flow through a pretreatment unit, where it is pretreated before being pumped to subsequent treatment processes. This effectively reduces the burden on subsequent condensate treatment, improves the quality of condensate treatment, and facilitates compliant discharge or recycling of condensate, making it more practical. When the water level reaches the set lower limit, drainage ends. The control center can automatically control the sequential shutdown of the solenoid valve and water pump, and then restart the hydraulic cylinder to retract its piston rod, causing the baffle to move upward and reset, allowing condensate collection to continue. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the left-side structure of the underground flue of this utility model;

[0013] Figure 3 This is a schematic diagram of the main structure of the baffle of this utility model when it is in contact with the bottom of the underground flue;

[0014] Figure 4 This is a schematic diagram of the main structure of the pretreatment mechanism of this utility model.

[0015] The diagram is labeled as follows: 1 is the underground flue, 2 is the water collection tank, 3 is the water pump, 4 is the drain pipe, 5 is the hydraulic cylinder, 6 is the baffle, 7 is the liquid level sensor, 8 is the solenoid valve, 9 is the drain pipe, 10 is the control center, 11 is the pretreatment mechanism, 12 is the sealing gasket, 13 is the check valve, 14 is the support, 15 is the water inlet channel, 16 is the water outlet channel, 17 is the water inlet branch pipe, 18 is the water outlet branch pipe, 19 is the control valve, 20 is the pretreatment box, 21 is the filter screen, 22 is the activated carbon, 23 is the hose, 24 is the quick connector, 25 is the movable base, and 26 is the brake-type universal wheel. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0017] like Figures 1 to 4 As shown, a coke oven underground flue drainage structure includes an underground flue 1, a water collection tank 2 located below the underground flue 1, and a water pump 3 located above ground. The bottom of the underground flue 1 is inverted conical, and its lowest point is connected to the top of the water collection tank 2 via a drain pipe 4. A hydraulic cylinder 5 is fixedly installed at the top of the underground flue 1 corresponding to the drain pipe 4. The piston rod of the hydraulic cylinder 5 faces downward and is fixedly connected to an inverted V-shaped baffle 6. The front and rear sides of the baffle 6 abut against the inner walls of the front and rear sides of the underground flue 1, and the bottom can abut against the bottom of the underground flue 1 on the left and right sides of the drain pipe 4. A liquid level sensor 7 is installed on the top of the water collection tank 2, and a drain pipe 9 with a solenoid valve 8 is connected to the bottom. A control center 10 and a pretreatment mechanism 11 are located above ground. The hydraulic cylinder 5, liquid level sensor 7, solenoid valve 8, and water pump 3 are all electrically connected to the control center 10. The inlet end of the pretreatment mechanism 11 is connected to the tail end of the drain pipe 9, and the outlet end is connected to the inlet of the water pump 3.

[0018] During the flue gas exhaust process in underground flue 1, the condensate produced can automatically flow under the action of the inclined surface at the bottom of underground flue 1 and be collected in the water collection tank 2 via the drain pipe 4 for temporary storage. During the process, the liquid level sensor 7 detects the water level information of the water collection tank 2 in real time and feeds it back to the control center 10. When the water level exceeds the set upper limit, the control center 10 can automatically control the operation of the hydraulic cylinder 5, causing its piston rod to extend and drive the baffle 6 to move down until the baffle 6 presses against the bottom of the underground pipe 1, blocking the upper end of the drain pipe 4. Then, the control center automatically controls the opening of the solenoid valve 8 and runs the water pump 3, which can pump out the condensate accumulated in the water collection tank 2. Moreover, because the baffle 6 blocks the upper end of the drain pipe 4, it can effectively prevent the flue gas flowing through it from being pumped out, preventing the flue gas from having an adverse effect on the subsequent condensate transportation and treatment equipment. The condensate pumped out through drain pipe 9 can first flow through pretreatment mechanism 11. After pretreatment, it is then transported to subsequent treatment processes by water pump 3. This effectively reduces the burden on subsequent condensate treatment, improves the treatment quality of condensate, and is more conducive to the compliant discharge or recycling of condensate, making it more practical. When the water level reaches the set lower limit, drainage ends. Control center 10 can automatically control the sequential closure of solenoid valve 8 and water pump 3, and restart hydraulic cylinder 5, causing its piston rod to retract and drive baffle 6 to move upward and reset, thus continuing to collect condensate. The level sensor 7 and control center 10 can both use existing technology; their specific models can be selected according to actual conditions and are not specifically limited here.

[0019] In this embodiment, sealing gaskets 12 are provided on the bottom end and front and rear sides of the baffle 6 to ensure the sealing performance of the baffle 6 when it comes into contact with the drain pipe 4 and improve the sealing effect.

[0020] In this embodiment, a one-way valve 13 is provided on the drain pipe 9 to prevent backflow when pumping out condensate.

[0021] In this embodiment, the pretreatment mechanism 11 includes a vertically arranged support 14. The bottom of the support 14 is provided with an inlet channel 15 and the top is provided with an outlet channel 16. The inlet channel 15 is connected to the tail end of the drain pipe 9 and the outlet channel 16 is connected to the inlet of the water pump 3. The left and right sides of the inlet channel 15 are fixedly connected with inlet branch pipes 17 and the left and right sides of the outlet channel 16 are fixedly connected with outlet branch pipes 18. The inlet branch pipes 17 and the outlet branch pipes 18 are both provided with control valves 19. The left and right sides of the support 14 are provided with movable pretreatment boxes 20. The lower part of the pretreatment box 20 is detachably connected to the inlet branch pipe 17 on the same side and the upper part is detachably connected to the outlet branch pipe 18 on the same side. The middle part of the pretreatment box 20 is fixedly provided with two filter screens 21 that are distributed vertically and vertically, and the pore size of the lower filter screen 21 is larger than that of the upper filter screen 21. Activated carbon 22 is filled between the two filter screens 21.

[0022] During the condensate drainage process, when the pretreatment unit 11 pretreats the condensate, it can open the control valve 19 on the inlet branch pipe 17 and outlet branch pipe 18 corresponding to one set of pretreatment tanks 20, while closing the control valve 19 on the inlet branch pipe 17 and outlet branch pipe 18 corresponding to the other set of pretreatment tanks 20. This puts the two sets of pretreatment tanks 20 in a standby state, allowing the condensate to enter the lower part of the corresponding pretreatment tank 20 through the drain pipe 9, the inlet channel 15, and the unobstructed inlet branch pipe 17, and flow from bottom to top, passing successively through the lower filter screen 21, activated carbon 22, and the upper filter screen 21 with smaller pore size. This achieves two-stage filtration and one-stage activated carbon adsorption purification pretreatment of the condensate. Afterwards, with the cooperation of the unobstructed outlet branch pipe 18 and outlet channel 16, the pretreated condensate can be pumped out by the water pump 3 to the subsequent treatment process. When the pretreatment tank 20 needs to be replaced, the status of the two sets of pretreatment tanks 20 can be adjusted by opening and closing the control valve 19. The spare pretreatment tank 20 can be activated and the pretreatment tank 20 to be replaced can be deactivated, thus allowing the replacement of the pretreatment tank 20 without affecting the overall process. During replacement, simply disconnect the pretreatment tank 20 from the corresponding inlet branch pipe 17 and outlet branch pipe 18 through the detachable connection, and then move the pretreatment tank 20 away using its movable design. Afterward, move and adjust the new pretreatment tank 20 into place, and then connect it to the corresponding inlet branch pipe 17 and outlet branch pipe 18, making it more convenient and practical.

[0023] In this embodiment, the ends of both the inlet branch pipe 17 and the outlet branch pipe 18 are fixedly connected to flexible hoses 23. Each flexible hose 23 is connected to the lower or upper part of the corresponding pretreatment tank 20 via a quick connector 24, facilitating easy disassembly and replacement of the pretreatment tank 20. The quick connector 24 can be any existing technology; it typically consists of a male and a female connector. The male or female connector can be pre-installed on the inlet branch pipe 17 and the outlet branch pipe 18, and the corresponding female or male connector can be pre-installed on the pretreatment tank 20 for use.

[0024] In this embodiment, the pretreatment box 20 is fixed on a movable base 25, and brake-type omnidirectional wheels 26 are installed at the four corners of the bottom of the movable base 25 to facilitate the flexible movement of the pretreatment box 20 and to lock it in place after it has moved into position. The brake-type omnidirectional wheels 26 can be made using existing technology.

[0025] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A drainage structure for an underground flue of a coke oven, comprising an underground flue, a water collection pool located beneath the underground flue, and a water pump located above ground, characterized in that, The bottom of the underground flue is inverted cone-shaped, and its lowest point is connected to the top of the sump via a drain pipe. A hydraulic cylinder is fixedly installed at the top of the underground flue corresponding to the drain pipe. The piston rod of the hydraulic cylinder faces downward and is fixedly connected to an inverted V-shaped baffle. The front and rear sides of the baffle abut against the inner walls of the front and rear sides of the underground flue, and the bottom can abut against the bottom of the underground flue on the left and right sides of the drain pipe. A liquid level sensor is installed on the top of the sump, and a drain pipe with a solenoid valve is connected to the bottom. A control center and a pretreatment mechanism are installed above ground. The hydraulic cylinder, liquid level sensor, solenoid valve, and water pump are all electrically connected to the control center. The water inlet of the pretreatment mechanism is connected to the tail end of the drain pipe, and the water outlet is connected to the water inlet of the water pump.

2. The coke oven underground flue drainage structure according to claim 1, characterized in that, Sealing gaskets are provided at the bottom and on both the front and rear sides of the baffle.

3. The coke oven underground flue drainage structure according to claim 1, characterized in that, The drain pipe is equipped with a one-way valve.

4. The underground flue drainage structure for coke ovens according to claim 1, characterized in that, The pretreatment mechanism includes a vertically arranged support. The bottom of the support has an inlet channel and the top has an outlet channel. The inlet channel is connected to the end of a drain pipe, and the outlet channel is connected to the inlet of a water pump. Both sides of the inlet channel and the outlet channel are fixedly connected to inlet branch pipes. Both the inlet and outlet branch pipes are equipped with control valves. Movable pretreatment boxes are provided on both sides of the support. The lower part of the pretreatment box is detachably connected to the inlet branch pipe on the same side, and the upper part is detachably connected to the outlet branch pipe on the same side. Two filter screens are fixedly arranged vertically in the middle of the pretreatment box, with the lower filter screen having a larger pore size than the upper filter screen. Activated carbon is filled between the two filter screens.

5. The coke oven underground flue drainage structure according to claim 4, characterized in that, The ends of the inlet and outlet branch pipes are all fixedly connected to flexible hoses, and the flexible hoses are connected to the lower or upper part of the corresponding pretreatment tank through quick connectors.

6. The coke oven underground flue drainage structure according to claim 4, characterized in that, The pretreatment box is fixed on a movable base, and braked casters are installed at the four corners of the bottom of the movable base.

Images