Device and method for reducing coke powder caking in water seal tank at top of dry quenching furnace

Abstract

The invention belongs to the technical field of dry quenching furnace top water seal tanks, and particularly discloses a device and a method for reducing caking in a dry quenching furnace top water seal tank, the device comprises a tank body and a circulating water filter tank, a water outlet of the circulating water filter tank is communicated with a plurality of flushing pipes, the plurality of flushing pipes fixedly penetrate through the tank body, and the tank body is communicated with the circulating water filter tank. A plurality of flushing pipes are fixedly connected with nozzles, a first regulating valve, a safety valve and a water suction pump are fixedly connected between the flushing pipes and the circulating water filter tank, an ultrasonic detector is arranged on the tank body, the tank body is communicated with four water outlet pipes, the water outlet pipes are communicated with a water inlet of the circulating water filter tank, and a second regulating valve is fixedly connected between the water outlet pipes and the circulating water filter tank; the ultrasonic detector determines the thickness and the position of the bonded coke powder, the adjusting valve I and the adjusting valve II are opened, and the filtered water is sprayed out from the flushing pipe and the nozzle to flush the bonded coke powder, so that the problem that the service life of the water seal tank is shortened due to burning loss and deformation of the water seal tank caused by caking of the coke powder bonded at the bottom or on the side wall of the water seal tank is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of the top water seal tank of a coke dry quenching furnace, and particularly relates to a device and method for reducing coking powder agglomeration in the top water seal tank of a coke dry quenching furnace. Background Art

[0002] Coke dry quenching is to use inert gas to exchange heat with red coke in a dry quenching furnace to cool the red coke. The inert gas that absorbs the heat of the red coke transfers the heat to a coke dry quenching boiler to generate steam. After being cooled, the inert gas is dust-removed and then blown into the dry quenching furnace again through a circulation fan to cool the red coke.

[0003] To prevent dust overflow during coke charging in a coke dry quenching furnace, the coke dry quenching furnace is mostly equipped with coiled pipes in the water seal tank. The coiled pipes are provided with holes above, and circulating water is used to stir the coke dust generated during the charging process evenly and take the coke dust away from the water seal tank to reduce the burning damage of the water seal tank caused by high temperature. In the actual production process, the coking powder agglomeration in the top water seal tank of a coke dry quenching furnace is mainly caused by the combined action of high-temperature sintering, water evaporation and concentration, chemical bonding, and insufficient fluid dynamics. The high-temperature coking powder escaping during the cooling of red coke undergoes pyrolysis or sintering after contacting the water seal tank. At the same time, the circulating water is heated and evaporated, resulting in the concentration of coking powder and minerals into a colloid and hardening; the alkaline substances in the coking powder react with the acidic components in the water to form adhesive salts, and the insufficient water flow rate or uneven distribution further exacerbates the deposition and compaction of coking powder, usually presenting as black / grayish-brown dense hard blocks at the bottom or side wall of the water seal tank, which are difficult to remove by conventional flushing, causing the burning damage and deformation of the water seal tank and shortening the service life of the water seal tank. Summary of the Invention

[0004] The purpose of the present invention is to provide a device and method for reducing coking powder agglomeration in the top water seal tank of a coke dry quenching furnace, so as to solve the problem that the bottom or side wall of the water seal tank is bonded with coking powder agglomerates, resulting in the burning damage and deformation of the water seal tank, thereby shortening the service life of the water seal tank.

[0005] To achieve the above object, the basic solution provided by the present invention is: a device for reducing agglomeration in the top water seal tank of a coke dry quenching furnace, including a tank body and a circulating water filter tank. The outlet of the circulating water filter tank is communicated with a plurality of flushing pipes. The plurality of flushing pipes are fixedly penetrated through the tank body. Sprayers are fixedly connected to the plurality of flushing pipes. A regulating valve I, a safety valve, and a water pump are fixedly connected between the flushing pipes and the circulating water filter tank. An ultrasonic detector is provided on the tank body. Four water outlet pipes are communicated with the tank body. The water outlet pipes are communicated with the inlet of the circulating water filter tank. A regulating valve II is fixedly connected between the water outlet pipes and the circulating water filter tank.

[0006] The principle and beneficial effects of the present invention are as follows: When there is coked powder adhered in the water seal tank, first use an ultrasonic detector to determine the thickness and position of the adhered coked powder, and then open regulating valve 1 and regulating valve 2 to spray the water in the circulating water filter tank through the flushing pipe and nozzle to flush the adhered coked powder, reducing the burning and deformation of the water seal tank caused by coked powder agglomeration, increasing the service life of the water seal tank. The flushing water after flushing is circulated to the circulating water filter tank through regulating valve 2, recycling the flushing water and reducing the flushing cost. The ultrasonic detector is a non-contact measurement with an accuracy of ±1mm, can perform real-time dynamic monitoring, online continuous scanning, adapt to high-temperature and high-dust environments, and has low maintenance costs. The safety valve is in a high-pressure and corrosive environment such as the flushing pipeline. When the system pressure exceeds the set value, the safety valve automatically relieves pressure quickly to avoid safety accidents such as bursting and leakage of the equipment caused by overpressure, increasing the safety of the device.

[0007] Solution 2, which is the preferred solution of the basic solution. The model of the ultrasonic detector is USM 36 DAC, the nozzle is an intelligent servo electric nozzle with the model of Spraying Systems AutoJet® E3, regulating valve 1 is a proportional regulating valve, the safety valve is a spring-type safety valve with the model of LESER 526, and regulating valve 2 is an electromagnetic regulating valve; USM 36 DAC achieves a thickness measurement accuracy of ±0.5mm in the detection of coked powder agglomeration in the dry quenching coke water seal tank. The intelligent servo electric nozzle realizes 0-340° electric rotation control (±1° accuracy) through the Modbus TCP protocol, and is equipped with a tungsten carbide nozzle and a 316L stainless steel main body to resist coked powder erosion for a long time. This nozzle supports flow regulation of 0.5-2.5m³ / h. The proportional regulating valve can achieve stepless continuous regulation of flow or pressure, and can dynamically adapt to system requirements in cooperation with PLC closed-loop control. The spring-type safety valve can quickly relieve pressure without external power and is resistant to high temperature, thus extending the service life of the device.

[0008] Solution 3, which is the preferred solution of Solution 2. The nozzle, ultrasonic detector, regulating valve 1, regulating valve 2 and the water pump are electrically connected to a PLC controller; The anti-interference design and redundancy configuration ability of the PLC ensure the continuous and stable operation of the system. Through the modular hardware architecture and programmable logic flexibility, high-precision control of industrial automation processes and coordinated management of multiple devices are realized, improving the efficiency of removing coked powder in the water seal tank, and thus extending the service life of the water seal tank.

[0009] Solution 4, which is the basic solution provided by the invention: A method for reducing agglomeration in the water seal tank at the top of the dry quenching coke oven, including the following steps: S1. Set the ultrasonic detector in the PLC controller to emit ultrasonic waves once every 1 hour, and set the rules for controlling the water pressure and flow rate of the proportional regulating valve in the PLC controller; S2. The ultrasonic detector transmits the position and thickness of the coked powder detected and adhered in the water seal tank to the PLC controller through ultrasonic reflection; S3. The PLC controller controls the angle of the intelligent servo electric spray head according to the position of the coked powder. The PLC controller controls the water pressure and flow rate of the proportional regulating valve according to the thickness of the coked powder. The PLC controller controls the water pump and the proportional regulating valve to open in sequence. The PLC controller controls the opening of the electromagnetic regulating valve to increase; S4. The water flow sprayed by the intelligent servo electric spray head clears the adhered coked powder. The PLC controller controls the ultrasonic detector to emit ultrasonic waves every 10 minutes; S5. The PLC controller judges whether the adhered coked powder is cleared through ultrasonic reflection. If the adhered coked powder is cleared, continue with step S5. If the adhered coked powder is not cleared, increase the water pressure until the adhered coked powder is cleared; S6. After the ultrasonic detector detects that the adhered coked powder is cleared, the PLC controller controls the water pump and the proportional regulating valve to close in sequence. The PLC controller controls the electromagnetic regulating valve to restore the opening. The PLC controller controls the ultrasonic detector to resume emitting ultrasonic waves once every hour.

[0010] Solution Five, which is the optimization of Solution Four. In step S1, the rule for controlling the water pressure of the proportional regulating valve is: When the thickness of the adhered coked powder is in the range of 0 - 1 cm, the proportional regulating valve controls the water pressure of the flushing water to be 0.4 MP, and the flow rate of the flushing water is 12 m / s; When the thickness of the adhered coked powder is in the range of 1 - 2 cm, the proportional regulating valve controls the water pressure of the flushing water to be 0.5 MP, and the flow rate of the flushing water is 15 m / s; When the thickness of the adhered coked powder is in the range of 2 - 3 cm, the proportional regulating valve controls the water pressure of the flushing water to be 0.6 MP, and the flow rate of the flushing water is 16 m / s. The PLC controller adjusts the circulating water volume according to the flow rate of the flushing water. The ultrasonic detector transmits the thickness and position of the detected coked powder to the PLC controller every hour. The PLC controller adjusts the angle of the spray head in real time according to the thickness of the adhered coked powder, and adjusts the water pressure and flow rate of the flushing water according to the position, increasing the flushing accuracy, reducing the flushing time, thereby reducing the impact of long-term water pressure changes on the water seal tank and extending the service life of the water seal tank.

[0011] Solution Six, which is the optimization of Solution Five. The flow rate calculation formula of the flushing water is , where Q is the flow rate of the flushing water, A is the cross-sectional area of the flushing pipe, and v is the flow rate of the flushing water.

[0012] Solution VII, which is the optimization of Solution IV. In step S5, if the coked powder adhered is not removed, the water pressure is increased by 0.05 MP every 10 minutes until the adhered coked powder is removed; after the adhered coked powder caking and hardening (Mohs hardness can reach 4-5 levels), it will accelerate the wear of the metal tank body, thereby reducing the service life of the water seal tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is the installation schematic diagram of a device and method for reducing coked powder caking in the top water seal tank of a coke dry quenching furnace according to the present invention; Figure 2 is the three-dimensional view of a device and method for reducing coked powder caking in the top water seal tank of a coke dry quenching furnace according to the present invention; Figure 3 is the front view of a device and method for reducing coked powder caking in the top water seal tank of a coke dry quenching furnace according to the present invention; Figure 4 is the top view of a device and method for reducing coked powder caking in the top water seal tank of a coke dry quenching furnace according to the present invention; Figure 5 is Figure 2 the enlarged view of part A in DETAILED DESCRIPTION OF THE INVENTION

[0014] The present invention will be further described in detail below through specific embodiments: The reference numerals in the accompanying drawings of the specification include: 1. tank body, 2. flushing pipe, 3. spray head, 4. regulating valve I, 5. ultrasonic detector, 6. water outlet pipe, 7. regulating valve II, 8. circulating water filtration tank, 9. safety valve, 10. water pump.

[0015] Embodiment 1 As Figures 1 to 5 shown: A device for reducing caking in the top water seal tank of a coke dry quenching furnace includes a tank body 1 and a circulating water filtration tank 8. A plurality of flushing pipes 2 are connected to the water outlet of the circulating water filtration tank 8. The plurality of flushing pipes 2 penetrate through the tank body 1 fixedly. A spray head 3 is fixedly connected to the plurality of flushing pipes 2. The spray head 3 is an intelligent servo electric spray head, with the model of SprayingSystems AutoJet® E3. A regulating valve I 4, a safety valve 9 and a water pump 10 are fixedly connected between the flushing pipe 2 and the circulating water filtration tank 8. The regulating valve I 4 is a proportional regulating valve. The safety valve 9 is a spring type safety valve, with the model of LESER 526. An ultrasonic detector 5 is arranged on the tank body 1. The model of the ultrasonic detector 5 is USM 36 DAC. Four water outlet pipes 6 are connected to the tank body 1. The water outlet pipes 6 are connected to the water inlet of the circulating water filtration tank 8. A regulating valve II 7 is fixedly connected between the water outlet pipes 6 and the circulating water filtration tank 8. The regulating valve II 7 is an electromagnetic regulating valve. The spray head 3, the ultrasonic detector 5, the regulating valve I 4, the regulating valve II 7 and the water pump 10 are electrically connected to a PLC controller.

[0016] The implementation method of this embodiment is as follows: When there is caked coke powder in the water seal tank body 1, the ultrasonic detector 5 transmits the detected coke powder information to the PLC controller. The PLC controller controls the water pump 10 to draw filtered water from the circulating water filter tank 8. The PLC controller controls the opening of the first regulating valve 4 and the safety valve 9, so that the filtered water flushes the caked coke powder. Then the PLC controller controls the second regulating valve 7 to increase the opening degree, and introduces the flushed filtered water into the circulating water filter tank 8 through the water outlet pipe 6 for recycling. When the ultrasonic detector 5 sends the information that the caked coke powder has been flushed away to the PLC controller, the PLC controller controls the first regulating valve 4 and the safety valve 9 to open and close in sequence, and adjusts the second regulating valve 7 to the normal opening degree.

[0017] Embodiment 2 A method for reducing caking in the top water seal tank of a dry quenching coke oven includes the following steps: S1. Set the ultrasonic detector 5 to emit ultrasonic waves once every hour in the PLC controller, and set the rules for controlling the water pressure and flow rate of the proportional regulating valve in the PLC controller. The rule for controlling the water pressure of the proportional regulating valve is: When the thickness of the caked coke powder is in the range of 0 - 1 cm, the proportional regulating valve controls the water pressure of the flushing water to be 0.4 MP, and the flow rate of the flushing water is 12 m / s; When the thickness of the caked coke powder is in the range of 1 - 2 cm, the proportional regulating valve controls the water pressure of the flushing water to be 0.5 MP, and the flow rate of the flushing water is 15 m / s; When the thickness of the caked coke powder is in the range of 2 - 3 cm, the proportional regulating valve controls the water pressure of the flushing water to be 0.6 MP, and the flow rate of the flushing water is 16 m / s. The PLC controller adjusts the circulating water volume according to the flow rate of the flushing water. The flow rate calculation formula is , where Q is the flow rate, A is the cross-sectional area of the flushing pipe, and v is the flow rate of the flushing water; S2. The ultrasonic detector 5 transmits the detected position and thickness of the caked coke powder in the water seal tank to the PLC controller through ultrasonic wave reflection; S3. The PLC controller controls the angle of the intelligent servo electric spray head according to the coke powder position, controls the water pressure and flow rate of the proportional regulating valve according to the coke powder thickness, controls the water pump 10 and the proportional regulating valve to open in sequence, and controls the electromagnetic regulating valve to increase the opening degree; S4. The water flow sprayed by the intelligent servo electric spray head clears the caked coke powder, and the PLC controller controls the ultrasonic detector 5 to emit ultrasonic waves once every 10 minutes; S5. The PLC controller judges whether the caked coke powder is cleared through ultrasonic wave reflection. If the caked coke powder is cleared, continue to step S5. If the caked coke powder is not cleared, increase the water pressure by 0.05 MP every 10 minutes until the caked coke powder is cleared; After the ultrasonic detector 5 detects that the bonded coke powder has been removed, the PLC controller controls the water pump 10 and the proportional regulating valve to close in sequence. The PLC controller controls the electromagnetic regulating valve to restore its opening degree, and the PLC controller controls the ultrasonic detector 5 to resume emitting ultrasonic waves once every hour.

[0018] The implementation mode of this embodiment is as follows: First, set in the PLC controller that the ultrasonic detector emits ultrasonic waves once every hour. Set the rule for controlling the water pressure of the proportional regulating valve in the PLC controller as follows: When the thickness of the bonded coke powder is in the range of 0 - 1 cm, the proportional regulating valve controls the water pressure of the flushing water to be 0.4 MP, and the flow rate of the flushing water is 12 m / s; when the thickness of the bonded coke powder is in the range of 1 - 2 cm, the proportional regulating valve controls the water pressure of the flushing water to be 0.5 MP, and the flow rate of the flushing water is 15 m / s; when the thickness of the bonded coke powder is in the range of 2 - 3 cm, the proportional regulating valve controls the water pressure of the flushing water to be 0.6 MP, and the flow rate of the flushing water is 16 m / s. The PLC controller adjusts the circulating water volume according to the flow rate of the flushing water. The flow rate calculation formula of the flushing water is , where Q is the flow rate of the flushing water, A is the cross-sectional area of the flushing pipe, and v is the flow rate of the flushing water.

[0019] When the ultrasonic detector 5 transmits the position and thickness of the bonded coke powder detected in the water seal tank to the PLC controller through ultrasonic wave reflection; the PLC controller controls the angle of the intelligent servo electric nozzle according to the coke powder position, the PLC controller controls the water pressure and flow rate of the proportional regulating valve according to the coke powder thickness, the PLC controller controls the water pump 10 and the proportional regulating valve to open in sequence, and the PLC controller controls the opening degree of the electromagnetic regulating valve to increase; the water flow sprayed by the intelligent servo electric nozzle clears the bonded coke powder, and the PLC controller controls the ultrasonic detector 5 to emit ultrasonic waves once every 10 minutes; the PLC controller judges whether the bonded coke powder has been cleared through ultrasonic wave reflection. If the bonded coke powder has not been cleared, the water pressure increases by 0.05 MP every 10 minutes until the bonded coke powder is cleared; if the bonded coke powder has been cleared, the PLC controller controls the water pump 10 and the proportional regulating valve to close in sequence, the PLC controller controls the electromagnetic regulating valve to restore its opening degree, and the PLC controller controls the ultrasonic detector 5 to resume emitting ultrasonic waves once every hour.

[0020] The above are only the embodiments of the present invention. Common general knowledge such as specific structures and characteristics in the solution is not described in detail here. It should be noted that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can still be made, and these should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the patent. The protection scope required by this application should be subject to the content of its claims, and the specific implementation manners and the like recorded in the specification can be used to interpret the content of the claims.

Claims

1. A device for reducing agglomeration in a water seal groove at the top of a dry coke quenching oven, characterized in that: The invention comprises a tank body (1) and a circulating water filter tank (8), wherein a plurality of flushing pipes (2) are connected to the water outlet of the circulating water filter tank (8), a plurality of the flushing pipes (2) and the tank body (1) are fixedly penetrated, a plurality of the flushing pipes (2) are fixedly connected to nozzles (3), a regulating valve 1 (4), a safety valve (9) and a water pump (10) are fixedly connected between the flushing pipes (2) and the circulating water filter tank (8), an ultrasonic detector (5) is provided on the tank body (1), four water outlet pipes (6) are connected to the tank body (1), the water outlet pipes (6) are connected to the water inlet of the circulating water filter tank (8), and a regulating valve 2 (7) is fixedly connected between the water outlet pipes (6) and the circulating water filter tank (8).

2. The device for reducing agglomeration in the water seal groove at the top of a dry coke quenching oven according to claim 1, characterized in that: The model of the ultrasonic detector (5) is USM 36 DAC, the nozzle (3) is an intelligent servo electric nozzle, the safety valve (9) is a spring-type safety valve, the regulating valve 1 (4) is a proportional regulating valve, and the regulating valve 2 (7) is an electromagnetic regulating valve.

3. The device for reducing agglomeration in the water seal groove at the top of a dry coke quenching oven according to claim 2, characterized in that: The nozzle (3), ultrasonic detector (5), regulating valve 1 (4), regulating valve 2 (7) and water pump (10) are electrically connected to a PLC controller.

4. A method for reducing agglomeration in a water seal groove at the top of a dry coke quenching oven, characterized in that: The following steps are involved: S1. An ultrasonic detector (5) is set in the PLC controller to emit ultrasonic waves every hour, and the rules for controlling the water pressure and flow rate of the proportional control valve are set in the PLC controller; S2. The ultrasonic detector (5) transmits the position and thickness of the coke powder detected in the water seal tank to the PLC controller through ultrasonic reflection; S3. The PLC controller controls the angle of the intelligent servo electric nozzle according to the coke powder position, the PLC controller controls the water pressure and flow rate of the proportional regulating valve according to the coke powder thickness, and the PLC controller controls the water pump, the proportional regulating valve and the electromagnetic regulating valve to open in sequence; S4. The water flow from the intelligent servo electric nozzle is used to remove the coke powder, and the PLC controller controls the ultrasonic detector (5) to emit ultrasonic waves every 10 minutes; S5. The PLC controller determines whether the bonded coke powder is removed by ultrasonic reflection. If the bonded coke powder is removed, the process continues to step S5. If the bonded coke powder is not removed, the water pressure is increased until the bonded coke powder is removed. S6. After the ultrasonic detector (5) detects that the coked coke powder has been removed, the PLC controller controls the water pump, the proportional control valve and the electromagnetic control valve to be closed in sequence, and the PLC controller controls the ultrasonic detector (5) to resume emitting ultrasonic waves every hour.

5. A method for reducing coke powder agglomeration in a top water seal tank of a dry coke quenching furnace according to claim 4, characterized in that: In step S1, the rule for controlling the water pressure of the proportional regulating valve is: When the thickness of the bonded coke powder is in the range of 0-1cm, the proportional regulating valve controls the water pressure of the flushing water to 0.4MP and the flow rate of the flushing water to 12m / s; When the thickness of the bonded coke powder is in the range of 1-2 cm, the proportional regulating valve controls the water pressure of the flushing water to 0.5 MPa and the flow rate of the flushing water to 15 m / s; When the thickness of the bonded coke powder is in the range of 2-3cm, the proportional regulating valve controls the water pressure of the flushing water to 0.6MP and the flow rate of the flushing water to 16m / s. The PLC controller adjusts the circulating water volume according to the flow rate of the flushing water.

6. A method for reducing coke powder agglomeration in a top water seal tank of a dry coke quenching furnace according to claim 5, characterized in that: The flow rate calculation formula of flushing water is: , where Q is the flow rate of flushing water, A is the cross-sectional area of ​​the flushing pipe, and v is the flow velocity of the flushing water.

7. The method for reducing coke powder agglomeration in the top water seal tank of a dry coke quenching furnace according to claim 4, characterized in that: In step S5, if the adhered coke powder is not removed, the water pressure is increased by 0.05 MP every 10 minutes until the adhered coke powder is removed.

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