A coke oven circuit deicing method

Abstract

The present invention relates to a method for deicing a coke oven track. A track connecting device is provided between two adjacent sections of the coke oven track. The track connecting device is provided with an expansion and contraction port. A heating and heat preservation device is provided on the lower surface and two side surfaces of each section of the coke oven track. Temperature sensors are provided on the tracks on both sides of the coal tower, in the middle of the coke blocking car track, and at the ends of the coke quenching car track. The temperature sensors are connected to the PLC / DCS system through ports. The heating and heat preservation device is controlled by the PLC / DCS system, including a separate control mode and a unified control mode. The advantages of the present invention are that the heating and heat preservation device can be controlled separately or in a unified manner according to the location of the coke oven track, which can reduce energy consumption in winter and facilitate fault diagnosis and troubleshooting. The track connecting device is flush with the upper surface of the coke oven track, so that the brushes can take on a transitional role at the joint portion of the coke oven track upper surface, ensuring that when the coke oven track joint is misaligned, the brushes are prevented from being scraped by the coke oven track.

Description

Technical Field

[0001] The present invention relates to the technical field of coking production, and in particular to a method for deicing a coke oven track. Background Art

[0002] The coke oven power supply line is an important component of the coke oven production power supply facilities. In winter, the coke oven power line is easily covered with ice in windy and snowy weather, resulting in the interruption of power supply between the coke oven power line and the key vehicles for coke oven production, seriously affecting the production and operation of the coke oven.

[0003] At present, in order to ensure the normal power supply of the coke oven circuit, the commonly used methods are as follows:

[0004] (1) Steam pipe heating method: Steam pipe heating method is the most widely used method at present. Steam pipes are installed on both sides of the sliding line of the quenching car, and steam is introduced to heat the sliding line to prevent ice and snow accumulation on the sliding line surface. Its advantages are simple equipment, easy operation, good use effect, and basically eliminate ice and snow accumulation. The disadvantage is that the pressure of the steam pipe network fluctuates. When the steam pressure is low, the condensate in the steam pipe cannot be discharged smoothly. The condensate blocks the steam flow and causes ice to form in the heating pipe, which in turn affects the heating effect. There is no precedent for the application of this method on coal loading cars and coke intercepting cars.

[0005] (2) Gas ignition heating method: Its disadvantage is that the heat of the gas is taken away when the wind is strong, resulting in poor use effect and waste of gas resources. It requires strengthened management and maintenance to prevent leakage and fire accidents.

[0006] (3) Electrical heating of brushes in contact with the coke oven circuit: This method has the disadvantage that the brushes heat the snow and ice accumulated on the corresponding coke oven circuit as the vehicle moves. The heating time is short and the actual application effect is poor. Snow and ice on the coke oven circuit can easily cause insulation between the coke oven circuit and the brushes, causing the vehicle to trip and posing a serious safety hazard to production.

[0007] (4) Fuel open flame heating method: Add a small box made of steel plate to the sliding track before and after the brush of the quenching car or the coke blocking car, put an appropriate amount of combustible materials (cotton, linen, cloth, etc.) on the box, add an appropriate amount of engine oil into the box and ignite it, so that it burns while moving to melt ice or snow; its disadvantage is that this method uses ignitable materials, and the stock cannot be too much, the combustion heating time will be limited, and open flames will be generated during use. Sparks are easy to fly when the wind is strong, which poses a certain risk.

[0008] (5) De-icing method of spraying salt water on coke oven tracks: On snowy or foggy days, measures such as sprinkling fine salt, spraying concentrated salt water, and applying conductive paste on the quenching or coke-blocking sliding lines are taken to accelerate the melting of ice and snow or enhance conductivity, so that the quenching car or coke-blocking car can pass through the ice and snow area with electricity. The disadvantage is that this method loses its effect when the amount of ice and snow is large or the outside temperature is low. In addition, this method requires electricity or a power outage (stop production) during operation, and salt sprinkling, salt water spraying, and conductive paste application are required, which poses a certain safety risk.

[0009] Currently, there is an urgent need for a coke oven circuit deicing method to reduce the above safety hazards. Summary of the Invention

[0010] The purpose of the present invention is to provide a coke oven circuit deicing method, thereby improving the safety of coke oven circuit deicing and achieving normal operation of the coke oven circuit power supply in winter.

[0011] To achieve the above object, the present invention is implemented through the following technical solutions:

[0012] A coke oven track deicing method specifically includes the following contents:

[0013] 1) A channel connecting device is provided between two adjacent sections of the coke oven channel. The channel connecting device is provided with an expansion and contraction port. A heating and heat preservation device is provided on the lower surface and two side surfaces of each section of the coke oven channel.

[0014] 2) Temperature sensors are installed on the electric tracks on both sides of the coal tower, in the middle of the electric track of the coke blocking car, and at the end of the electric track of the coke quenching car. The temperature sensors are connected to the PLC / DCS system through ports;

[0015] 3) The heating and insulation device is controlled by the PLC / DCS system, including individual control mode and unified control mode:

[0016] Individual control mode: When the temperature of the temperature sensor at a different position is lower than the set value 1, the heating and heat preservation device at that position is started; when the temperature of the temperature sensor at that position is greater than the set value 2, the heating and heat preservation device at that position is stopped;

[0017] Unified control mode: When the temperature of one temperature sensor is lower than the set value of three, all heating and heat preservation devices are started; when the temperature of all temperature sensors is greater than the set value of two, all heating and heat preservation devices are stopped.

[0018] The circuit connection device is an integrated structure with two expansion and contraction ports symmetrically arranged on the top. The two expansion and contraction ports are pre-buried at the ends of the coke oven circuit.

[0019] The expansion and contraction port is a through-groove structure with an opening at the top.

[0020] The electrical connections are soldered on the bottom.

[0021] The channel connecting device is flush with the upper surface of the coke oven channel.

[0022] The heating and heat preservation device includes an insulation layer and a heating plate. The heating plate is arranged between the two insulation layers. The heating and heat preservation device is used for insulation between the coke oven circuit and transfers heat to the coke oven circuit. The heating and heat preservation device is connected to the PLC / DCS system through a port.

[0023] The heating plate is a carbon fiber electric heating plate.

[0024] An insulating layer is laid between the coke oven circuit and the heating and insulation device, and the insulating layer is a rubber insulation board.

[0025] The height of the heating and heat preservation devices on both sides of each section of the coke oven track is lower than the height of the corresponding coke oven track.

[0026] The cross section of the coke oven channel is I-shaped, and the upper surface of the coke oven channel is arc-shaped.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The heating and insulation devices can be controlled individually or in a unified manner according to the location of the coke oven circuit, which can reduce energy consumption in winter and facilitate fault diagnosis and elimination;

[0029] 2. The operator adjusts the set value through the HMI human-machine interface according to the actual situation on site;

[0030] 3. The circuit connection device is flush with the upper surface of the coke oven circuit, so that the brush can take on the transition function at the joint on the upper surface of the coke oven circuit, and prevent the coke oven circuit from scraping the brush when the coke oven circuit joint is misaligned;

[0031] 4. The heating and heat preservation device is used for insulation between the coke oven circuit and can transfer heat upward to the coke oven circuit;

[0032] 5. Laying an insulating layer between the coke oven circuit and the heating and insulation device can prevent the coke oven circuit and the heating and insulation device from expanding inconsistently and causing damage to the heating and insulation device;

[0033] 6. The upper surface of the coke oven circuit is arc-shaped to prevent water from accumulating on the surface of the coke oven circuit and to ensure good conductivity when the brush contacts the coke oven circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a cross-sectional diagram of the coke oven circuit.

[0035] Figure 2 This is the main view of the circuit connection device at the circuit joint of the coke oven.

[0036] Figure 3It is a top view of the circuit connection device at the circuit joint of the coke oven.

[0037] Figure 4 This is a schematic diagram of the electrical connection device.

[0038] Figure 5 It is a schematic diagram of a heating and heat preservation device.

[0039] In the figure: 1-coke oven channel 2-welding part 3-transition part 4-expansion and contraction port 5-insulation layer 6-heating plate. DETAILED DESCRIPTION

[0040] The present invention will be described in detail below with reference to the accompanying drawings, but it should be noted that the implementation of the present invention is not limited to the following embodiments.

[0041] The following examples are implemented under the premise of the technical solution of the present invention, and provide detailed implementation methods and specific operating processes, but the scope of protection of the present invention is not limited to the following examples. The methods used in the following examples are conventional methods unless otherwise specified.

[0042] [Example 1]

[0043] A deicing method for a coke oven circuit 1 is implemented based on a PLC / DCS system and specifically includes the following contents:

[0044] 1) Temperature sensors are installed on the electric tracks on both sides of the coal tower, in the middle of the electric track of the coke blocking car, and at the end of the electric track of the coke quenching car. The temperature sensors are connected to the PLC / DCS system through ports;

[0045] 2) The heating and insulation device is controlled by the PLC / DCS system and the control mode is selected through the HMI human-machine interface, including automatic mode and manual mode;

[0046] aAutomatic mode, the specific contents are as follows:

[0047] Individual control mode: When the temperature sensor at different locations is lower than 0°C, the heating and heat preservation device at that location is started; when the temperature sensor at that location is higher than 15°C, the heating and heat preservation device at that location is stopped;

[0048] Unified control mode: When one temperature sensor is lower than 5℃, all heating and heat preservation devices are started; when all temperature sensors are higher than 15℃, all heating and heat preservation devices are stopped.

[0049] bManual mode: The operator starts / stops the heating and insulation devices at different positions through the HMI human-machine interface.

[0050] See Figure 1-Figure 5A deicing device for a coke oven channel 1 includes a coke oven channel 1, which includes several sections. The length of a single section of the coke oven channel 1 ranges from 6m to 13m. A channel connecting device is provided between two adjacent sections of the coke oven channel 1, and the channel connecting device is flush with the upper surface of the coke oven channel 1. The channel connecting device is an integrated structure, including a transition portion 3, a welding portion 2, and two symmetrically arranged expansion and contraction ports 4. The two expansion and contraction ports 4 are arranged on both sides of the transition portion 3, the transition portion 3 is welded to the adjacent coke oven channel 1, and both ends of the transition portion 3 are buried in the adjacent coke oven channels 1, so that a gap is left between the adjacent coke oven channels 1 for absorbing the expansion between the coke oven channels 1. The two expansion and contraction ports 4 are pre-buried at the ends of the joint of the coke oven channel 1, and the expansion and contraction ports 4 are a through groove structure with a top opening. The direction of the through groove is perpendicular to the central axis of the coke oven channel 1, and the channel connecting device is welded through the welding portion 2. The track connection device is made of carbon steel, which is used to take the transition role at the joint of the brush on the upper surface of the coke oven track 1 and ensure that the track will not scratch the brush when the track joint is misaligned; the heating and heat preservation device includes an insulation layer 5 and a heating plate 6. The heating plate 6 is a carbon fiber electric heating plate with a width of 70mm to 90mm. The heating plate 6 is arranged on the upper part of the insulation layer 5. The insulation layer 5 is made of rubber fiber board. The lower surface and two side surfaces of each section of the coke oven track 1 (except the upper working surface of the coke oven track 1, that is, the contact surface with the brush) are ) is provided with a heating and heat preservation device, the height of the heating and heat preservation device is 15mm to 20mm lower than the height of the corresponding coke oven track 1, the heating and heat preservation device is used for insulation between the coke oven track 1 and the coke oven track 1 and transfers heat to the coke oven track 1, an insulating layer is laid between the coke oven track 1 and the heating and heat preservation device, the insulating layer is a rubber insulation board, the insulating layer is used to cause damage to the heating and heat preservation device due to inconsistent expansion of the coke oven track 1 and the heating and heat preservation device, the heating and heat preservation device is connected to the PLC / DCS system through a port.

[0051] [Example 2]

[0052] In this embodiment, a deicing method for a coke oven circuit 1 is the same as that in embodiment 1, with the addition of a detection process. The detection process is as follows:

[0053] A 6m long electric track is selected to be consistent with the 6m coke oven quenching line slide. The 6m long electric track requires a total power of about 800 watts for the heating plate 6. When the outdoor temperature is -9℃, under simulated snowy weather, the surface temperature of the slide line is maintained above 20℃, which can cope with extreme rain and snow weather.

[0054] After the heating and heat preservation device of the circuit is powered on, it will generate heat in 5 minutes and the surface temperature of the circuit will reach a constant value in 20 minutes. In order to test the time and degree of the decrease in the surface temperature of the circuit, the heating and heat preservation device will stop heating;

[0055] Outdoor environment: The outdoor ambient temperature is -9°C, the relative humidity is 36% RH, and the wind speed is northwest wind level 3-4. When the heating and insulation device stops heating for 3.45 hours, the surface temperature of the bottom of the channel 60 mm from the top drops to 48°C. When the heating and insulation device stops heating for 4.2 hours, the surface temperature of the bottom of the channel 60 mm from the top drops to 36.2°C.

[0056] Through the above tests, it was found that when the heating and insulation device was running for 24 hours, the surface temperature of the circuit could reach above 35°C.

[0057] [Example 3]

[0058] In this embodiment, a deicing method for a coke oven track 1 is similar to that of Example 1, except that, in addition to Example 1 and / or Example 2, the cross-section of the coke oven track 1 is configured as an I-shape. The I-shaped cross-section of the coke oven track 1 has an arc-shaped upper surface with an arc angle of 1° to 2°. This prevents ice from forming on the surface of the coke oven track while ensuring good electrical conductivity when the brushes contact the track.

[0059] The heating and heat preservation device of the present invention is controlled individually or uniformly according to the location of the coke oven track, which can reduce energy consumption in winter and facilitate fault diagnosis and elimination; the operator adjusts the set value through the HMI human-machine interface according to the actual situation on site; the track connecting device is flush with the upper surface of the coke oven track, so that the brushes can take on the transition function at the joint part of the upper surface of the coke oven track, and ensure that the coke oven track does not scratch the brushes when there is a height misalignment of the coke oven track joint; the upper surface of the coke oven track is arc-shaped, which prevents water from accumulating on the surface of the coke oven track and ensures good conductivity when the brushes contact the coke oven track; the heating and heat preservation device is used for insulation between the coke oven track and can transfer heat upward to the coke oven track; an insulating layer is laid between the coke oven track and the heating and heat preservation device, which can prevent the heating and heat preservation device from being damaged due to inconsistent expansion of the coke oven track and the heating and heat preservation device.

Claims

1. A coke oven circuit deicing method, characterized in that: Specifically include the following: 1) A channel connecting device is provided between two adjacent sections of the coke oven channel. The channel connecting device is provided with an expansion and contraction port. A heating and heat preservation device is provided on the lower surface and two side surfaces of each section of the coke oven channel. 2) Temperature sensors are installed on the electric tracks on both sides of the coal tower, in the middle of the electric track of the coke blocking car, and at the end of the electric track of the coke quenching car. The temperature sensors are connected to the PLC / DCS system through ports; 3) The heating and insulation device is controlled by the PLC / DCS system, including individual control mode and unified control mode: Individual control mode: When the temperature of the temperature sensor at a different position is lower than the set value 1, the heating and heat preservation device at that position is started; when the temperature of the temperature sensor at that position is greater than the set value 2, the heating and heat preservation device at that position is stopped; Unified control mode: When the temperature of one temperature sensor is lower than the set value of three, all heating and heat preservation devices are started; when the temperature of all temperature sensors is greater than the set value of two, all heating and heat preservation devices are stopped; The electric channel connection device is an integrated structure, with two expansion and contraction ports symmetrically arranged on the top, and the two expansion and contraction ports are pre-buried at the ends of the coke oven electric channel; The expansion and contraction port is a through-groove structure with an opening at the top; The cross section of the coke oven channel is I-shaped, and the upper surface of the coke oven channel is arc-shaped.

2. A coke oven track deicing method according to claim 1, characterized in that: The electrical connection device is welded at the bottom.

3. A coke oven track deicing method according to claim 1, characterized in that: The channel connecting device is flush with the upper surface of the coke oven channel.

4. A coke oven track deicing method according to claim 1, characterized in that: The heating and heat preservation device includes an insulation layer and a heating plate. The heating plate is arranged between the two insulation layers. The heating and heat preservation device is used for insulation between the coke oven circuit and transfers heat to the coke oven circuit. The heating and heat preservation device is connected to the PLC / DCS system through a port.

5. A coke oven track deicing method according to claim 4, characterized in that: The heating plate is a carbon fiber electric heating plate.

6. A coke oven track deicing method according to claim 4, characterized in that: An insulating layer is laid between the coke oven circuit and the heating and heat-insulating device, and the insulating layer is a rubber heat-insulating board.

7. A coke oven track deicing method according to claim 4, characterized in that: The height of the heating and heat preservation devices on both sides of each section of the coke oven track is lower than the height of the corresponding coke oven track.

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