A winter insulation system for a newly built annular roasting furnace and its usage method

Abstract

This invention discloses a winter insulation system and its usage method for a newly built annular roasting furnace, relating to the technical field of carbon production furnace and kiln equipment. It includes several furnace chamber groups, each comprising a head furnace and a tail furnace. Multiple intermediate furnaces are connected to the head and tail furnaces via fire channels and fire pits. Each of the head furnace, tail furnace, and intermediate furnaces has a furnace cover on its upper surface. An ignition nozzle is installed on the upper surface of the head furnace cover. Thermocouples are installed on the top of the head and tail furnace covers. An exhaust pipe is installed at the tail furnace's exhaust port, with the other end of the exhaust pipe connected to a flue, and the other end of the flue connected to a chimney. An exhaust fan and an electrostatic precipitator are installed in the middle of the flue. Ignition at the ignition nozzle in the head furnace generates hot flue gas. Through negative pressure suction, the hot flue gas sequentially enters other newly built furnace bodies through the fire channels and fire pits for drying. Finally, it enters the flue through the tail furnace exhaust pipe and exits through the chimney, achieving a low-energy-consumption and high-efficiency drying effect.

Description

Technical Field

[0001] This invention relates to the field of carbon production furnace and kiln equipment technology, and more specifically to a winter insulation system and its usage method for a newly built ring roasting furnace. Background Technology

[0002] The ring furnace is a common type of furnace equipment in carbon industry production. After the construction of a new ring furnace is completed, it is necessary to bake the furnace before it is put into operation. The furnace is heated slowly according to a certain temperature rise curve so that the moisture contained in the lining of each part of the furnace is gradually released until the operating temperature is reached and the furnace is completely dry. The furnace is usually baked under load, that is, the furnace is filled with filler or products so that production and furnace baking are carried out simultaneously.

[0003] In northern my country, the construction of ring-type roasting furnaces is usually completed before winter. However, if the ring furnace cannot start production immediately after construction, there will be a problem of the newly built furnace chambers needing to survive the winter. Due to the cold winter weather, the moisture contained in the masonry will freeze and cause the furnace body to deform, which will affect the service life of the furnace chambers. General insulation work requires roasting each furnace body, which results in high insulation costs. Summary of the Invention

[0004] The purpose of this invention is to solve the above-mentioned technical problems by providing a winter insulation system and method for a newly built ring-type roasting furnace, which can provide winter insulation for the newly built roasting furnace to ensure its service life and save insulation costs during the winter insulation process.

[0005] To achieve the above objectives, the present invention specifically adopts the following technical solution: a winter insulation system for a newly built annular roasting furnace, comprising several furnace chamber groups, each furnace chamber group including a head furnace and a tail furnace, the head furnace and tail furnace being connected by fire channels and fire pits to multiple intermediate furnaces, the upper end face of the head furnace, tail furnace and multiple intermediate furnaces being provided with furnace covers, the upper end face of the furnace cover of the head furnace being provided with an ignition nozzle, the top of the furnace covers of the head furnace and tail furnace being installed with thermocouples, the exhaust port of the tail furnace being provided with an exhaust pipe, the other end of the exhaust pipe being connected to a flue, the other end of the flue being connected to a chimney, and an exhaust fan being installed in the middle of the flue.

[0006] Preferably, an electrostatic precipitator is installed in the middle of the flue.

[0007] Preferably, the exhaust fan and multiple thermocouples are remotely connected to a controller.

[0008] A method for using a winter insulation system for a newly built annular roasting furnace includes the following steps:

[0009] Step 1: Ignite the combustion nozzles of the first furnace in each furnace chamber group, and start the exhaust fan at the same time to maintain a low negative pressure in the flue. The hot flue gas is introduced into multiple intermediate furnaces and tail furnaces in sequence through the bottom fire channel and the fire well inside the furnace body, and the furnace body of the first furnace, multiple intermediate furnaces and tail furnaces is heated.

[0010] Step 2: After the flue gas enters the tail furnace, it enters the flue, flue fan, and electrostatic precipitator in sequence through the tail furnace's exhaust pipe, and finally the flue gas is discharged through the chimney.

[0011] Step 3: Detect the temperature at the furnace cover of the first furnace using thermocouples. When the temperature of the first furnace reaches 200℃, stop the heating of the furnace body.

[0012] Step 4: Detect the temperature at the furnace cover of the tail furnace using thermocouples. If the tail furnace temperature is higher than 20℃, lower the temperature inside the head furnace. If the tail furnace temperature is lower than 20℃, adjust the frequency converter of the exhaust fan to increase the negative pressure, thereby completing the heat preservation work.

[0013] The beneficial effects of this invention are as follows:

[0014] 1. By igniting the first furnace chamber (head furnace), the exhaust fan is started, and the flue gas is drawn out by negative pressure, which then transfers heat to each furnace body in the system, keeping the furnace chamber at a temperature above zero degrees Celsius. This completes the winter insulation work of the newly built roasting furnace, avoiding damage to the furnace chamber structure caused by the freezing of moisture in the furnace chamber, thereby ensuring the service life of the roasting furnace.

[0015] 2. Since multiple furnace chambers are connected to the fire shaft through fire channels, the combustion flue gas generated by the first furnace dries the other furnace bodies, reducing the amount of flue gas emitted during furnace drying, achieving environmental protection effects, and consuming less natural gas per day, saving insulation costs by utilizing the characteristics of heat transfer.

[0016] 3. Since the furnace chamber has been preheated and dried, the furnace temperature can be easily controlled during the next start of furnace baking and normal production, further ensuring the service life of the roasting furnace. Attached Figure Description

[0017] Figure 1 This is a system schematic diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the flue gas flow inside the furnace.

[0019] Attached reference numerals: 1. Furnace chamber group; 101. Head furnace; 102. Tail furnace; 103. Intermediate furnace; 2. Furnace cover; 3. Ignition nozzle; 4. Thermocouple; 5. Exhaust pipe; 501. Flue; 6. Exhaust fan; 7. Electrostatic precipitator; 8. Chimney. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0021] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] Please see Figure 1-2 The present invention provides the following technical solution: a winter insulation system for a newly built annular roasting furnace, comprising several furnace chamber groups 1, each furnace chamber group 1 including a head furnace 101 and a tail furnace 102, the head furnace 101 and the tail furnace 102 being connected by fire channels and fire pits to multiple intermediate furnaces 103, the upper end faces of the head furnace 101, the tail furnace 102 and the multiple intermediate furnaces 103 being provided with furnace covers 2, the upper end face of the furnace cover 2 of the head furnace 101 being provided with an ignition nozzle 3, the top of the furnace covers 2 of the head furnace 101 and the tail furnace 102 being equipped with thermocouples 4, the exhaust port of the tail furnace 102 being equipped with an exhaust pipe 5, the other end of the exhaust pipe 5 being connected to a flue 501, the other end of the flue 501 being connected to a chimney 8, an exhaust fan 6 being installed in the middle of the flue 501, and an electrostatic precipitator 7 being installed in the middle of the flue 501.

[0023] In this embodiment: the fire channel at the bottom of the furnace and the internal fire well are connected to each furnace body to allow flue gas to flow through. The exhaust fan 6 generates negative pressure to accelerate air flow. Ignition is carried out at the ignition nozzle 3 of the first furnace 101 to generate hot flue gas. The hot flue gas is drawn from the fire channel and fire well into other newly built furnace bodies for drying through the negative pressure. The first furnace 101 to the last furnace 102 are connected in series. The flue gas finally enters the flue 501 from the exhaust pipe 5 of the last furnace and is discharged through the exhaust fan 6, the electrostatic precipitator 7 and the chimney 8, thereby achieving a low-energy-consumption and high-efficiency drying effect.

[0024] As a technical optimization of the present invention, a controller is installed separately in the control room, and the smoke exhaust fan 6 and multiple thermocouples 4 are all connected to the controller for signal transmission.

[0025] In this embodiment: when the temperature of the first furnace reaches 200°C, the thermocouple 4 at the first furnace 101 transmits the detected temperature value to the controller. After the operator views the value on the controller's display screen, the heating operation of the first furnace combustion chamber is stopped. The thermocouple 4 at the tail furnace 102 transmits the detected temperature value to the controller. When the temperature is higher than 20°C, the operator lowers the temperature of the first furnace 101. When the temperature of the tail furnace is lower than 20°C, the frequency converter of the exhaust fan 6 is adjusted by the controller to increase the negative pressure, thereby maintaining a constant drying temperature.

[0026] The working principle and usage process of this invention are as follows: Ignition is performed at the combustion nozzle of the head furnace 101 in each furnace chamber group 1, and the exhaust fan 6 is started simultaneously to maintain a low negative pressure in the flue 501. Hot flue gas is sequentially introduced into multiple intermediate furnaces 103 and the tail furnace 102 through the bottom fire channel and the internal fire shaft of the furnace body. The furnace bodies of the head furnace 101, the multiple intermediate furnaces 103, and the tail furnace 102 are heated. After entering the tail furnace 102, the flue gas enters the flue 501 and the exhaust fan sequentially through the exhaust pipe 5 of the tail furnace 102. 6. Electrostatic precipitator 7. Finally, the flue gas is discharged through the chimney 8. The temperature at the furnace cover 2 of the first furnace 101 is detected by thermocouple 4. When the temperature of the first furnace 101 reaches 200℃, the heating of the furnace body of the first furnace 101 is stopped. The temperature at the furnace cover 2 of the tail furnace 102 is detected by thermocouple 4. When the temperature of the tail furnace 102 is higher than 20℃, the temperature inside the furnace body of the first furnace 101 is reduced. When the temperature of the tail furnace 102 is lower than 20℃, the frequency converter of the exhaust fan 6 is adjusted to increase the negative pressure, thereby completing the heat preservation work.

[0027] The technical solutions provided by the embodiments of the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the embodiments of the present invention. The description of the above embodiments is only for helping to understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the embodiments of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A method for using a winter insulation system for a newly built annular roasting furnace, characterized in that, Includes the following steps: Step 1: Ignite the combustion nozzle of the head furnace (101) of each furnace chamber group (1) and start the exhaust fan (6) at the same time to keep the flue (501) at a low negative pressure. The hot flue gas is introduced into multiple intermediate furnaces (103) and tail furnaces (102) in sequence through the bottom fire channel and the fire well inside the furnace body. The furnace bodies of the head furnace (101), multiple intermediate furnaces (103) and tail furnace (102) are heated. Step 2: After the flue gas enters the tail furnace (102), it enters the flue (501), the flue fan (6), and the electrostatic precipitator (7) through the exhaust pipe (5) of the tail furnace (102) in sequence. Finally, the flue gas is discharged through the chimney (8). Step 3: Detect the temperature at the furnace cover (2) of the first furnace (101) using thermocouple (4). When the temperature of the first furnace (101) reaches 200℃, stop the heating of the furnace body of the first furnace (101). Step 4: Detect the temperature at the furnace cover (2) of the tail furnace (102) by thermocouple (4). When the temperature of the tail furnace (102) is higher than 20°C, reduce the temperature inside the furnace of the head furnace (101). When the temperature of the tail furnace (102) is lower than 20°C, adjust the frequency conversion of the exhaust fan (6) to increase the negative pressure, thereby completing the heat preservation work. The winter insulation system includes several furnace chamber groups (1), each furnace chamber group (1) includes a head furnace (101) and a tail furnace (102). The head furnace (101) and the tail furnace (102) are connected by fire channels and fire pits to a number of intermediate furnaces (103). The head furnace (101), the tail furnace (102) and the number of intermediate furnaces (103) are all provided with furnace covers (2). The upper surface of the furnace cover (2) of the head furnace (101) is provided with an ignition nozzle (3). The top of the furnace cover (2) of the head furnace (101) and the tail furnace (102) are all equipped with thermocouples (4). The exhaust port of the tail furnace (102) is equipped with an exhaust pipe (5). The other end of the exhaust pipe (5) is connected to a flue (501). The other end of the flue (501) is connected to a chimney (8). The middle part of the flue (501) is equipped with an exhaust fan (6). An electrostatic precipitator (7) is installed in the middle of the flue (501); The exhaust fan (6) and multiple thermocouples (4) are remotely connected to a controller.

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