CN102564109A - Irregular furnace moving operation and warming method for turning furnace chambers of roasting furnace - Google Patents

Abstract

The invention relates to a furnace moving operation and temperature raising method of a turning furnace chamber of a roasting furnace at different periods. When the smoke exhaust rack of the heating system enters the two furnace chambers before the connecting fire channel, a 26-hour furnace moving cycle is adopted. When the system exhausts smoke When the rack runs to the second furnace chamber after connecting the fire channel, the heating zone first uses 6 chambers to heat for 26 hours, and then moves the combustion rack on the third heating furnace chamber to the third preheating furnace chamber in advance for forced heating For 8 hours, use 5-chamber operation to speed up the heating rate of the preheating section. When the smoke exhaust rack moves to the third furnace chamber after the turn, the original 30-hour furnace moving cycle and heating curve will be restored. Increase the gas temperature in the preheating section of the furnace during the operation of the turning furnace, speed up the temperature rise rate in the preheating section, ensure that the tar can be burned in each furnace in the preheating section, and reduce the energy consumption level and smoke during the operation of the turning furnace. The mass of combustibles taken away by the gas eliminates the impact on the production capacity of the roaster turning process.

Description

The operation of moving the furnace with different periods in the turning furnace chamber of the roasting furnace and the method of heating up

technical field

The present invention relates to a furnace moving operation and temperature raising method of a roasting furnace, in particular to a method for moving a furnace of an anode roasting furnace with different cycles and a heating method in a turning furnace chamber. , adjust the roasting temperature rise curve to ensure that the tar is fully burned in the fire channel.

Background technique

In the roasting process of the anode roaster, the furnace shifting cycle of about 30 hours is usually used. The system configuration uses three preheating furnace rooms, three forced heating furnace rooms and six to seven cooling furnace rooms. When the heating furnace room runs to When turning the furnace chamber, since there is an additional connecting fire channel in the heating zone, the temperature rise of the connecting fire channel needs to absorb a large amount of heat, thus affecting the temperature rise rate of the downstream furnace room. Due to the insufficient temperature of the flue gas in the downstream furnace room, the carbon block The tar precipitated in the flue gas cannot be completely burned in the flue, causing a large amount of tar to enter the flue gas purification system, which will bring the following adverse results:

1. Tar and dust are bonded in the smoke exhaust rack and the smoke exhaust system pipes. Long-term accumulation will affect the flow of smoke in the smoke exhaust system, and at the same time, the negative pressure required for smoke exhaust is greater.

2. The increase in the amount of tar in the exhaust gas increases the working pressure of the purification system.

3. The incomplete combustion of tar causes waste of energy and increases energy consumption per unit of product.

4. In order to achieve a normal roasting level, the method of prolonging the roasting cycle is often adopted, which reduces the production capacity of the roasting furnace.

Contents of the invention

In order to solve the above-mentioned technical problems, the present invention relates to a method for moving furnaces with unequal periods in the curved furnace chamber of a roasting furnace and a method for raising the temperature. , to ensure that the tar is fully burned in the fire channel, reduce the energy consumption level of the turning furnace chamber of the roaster, reduce the tar content in the flue gas, and ensure the production capacity of the roaster.

In order to achieve the above-mentioned purpose, the present invention adopts the unequal-period moving furnace operation and heating method of the turning furnace chamber of the roasting furnace. When the smoke exhaust rack of the heating system enters the first two furnace chambers connected to the fire passage, the heating rate of this area is accelerated, and the heating time is shortened. A 26-hour furnace moving cycle is adopted. When the heating system enters the turning furnace chamber, the fire channel is connected to the heating system, and the smoke exhaust rack is in the first and second furnace chambers after the turn, the heating zone first uses six chambers to heat 26 After heating up for one hour, move the combustion rack on the third heating furnace chamber to the third preheating furnace chamber in advance, and force heating for 8 hours. Use five-chamber operation to speed up the heating rate of the preheating section, so that the smoke exhaust rack The heating time of the first and second furnace chamber after the turn is increased to 34 hours, the heating time of the preheating section is increased, and when the smoke exhaust rack is moved to the third furnace chamber after the turn, the original 30 hours is restored Moving furnace cycle and heating curve.

In the operation method described above, when the smoke exhaust rack runs to the first two furnace chambers connected to the fire passage, the heating rate of the system is accelerated, so that the seventh and sixth furnace chambers before the connection with the fire passage can reach the roasting target temperature in 26 hours, which is carried out in advance The operation of moving the furnace saves 8 hours of roasting and heating time for the next operation of the turning furnace chamber.

In the operation method described above, when the smoke exhaust rack runs to the first and second furnace chambers connected to the fire channel, firstly, a 26-hour roasting heating curve is adopted to speed up the heating rate of the system, so that the heating furnace chamber reaches the roasting target temperature in advance .

In the described method of operation, after the first and second furnace chambers adopt an accelerated 26-hour roasting temperature rise curve after the turning furnace chamber runs to the connecting fire channel, the combustion rack in the third heating furnace chamber is moved to the third pre-heating curve. The heating furnace chamber adopts the mode of 5-chamber operation, and the preheating section is forced to be heated for 8 hours twice to increase the temperature of the fire path in the preheating section.

After the second operation of the turning furnace chamber for 8 hours and the five-chamber operation, the smoke exhaust rack, the blast rack and the cooling rack are moved, and the blast rack is moved to the third furnace chamber behind the connecting fire channel, and the recovery time is 30 The six-chamber operation of the one-hour furnace moving cycle completes the operation mode of alternating operation of the six-chamber and five-chamber turning furnace chambers of the roaster.

Advantages and effects of the present invention: through the alternate use of the six-chamber and five-chamber operation, the operation method of moving the furnace with different cycles of the combustion frame and the smoke exhaust frame, and different heating curves, the preheating section during the operation of the turning furnace chamber is accelerated The temperature rise rate increases the gas temperature in the preheating section of the turning furnace chamber, so that the tar and volatile matter precipitated from the carbon block can be fully burned in the fire passage, reducing the energy consumption level of the product during the operation of the turning furnace chamber and reducing the smoke. The quality of combustibles taken away by the gas, while ensuring that the heating time used by the flame system through the turning furnace chamber is unchanged from the time used by the normal heating furnace chamber, reducing the impact of the addition of connecting fire channels on the heating system, and does not affect the roaster production capacity.

Description of drawings

Figure 1 is a schematic diagram of the method of operation of the present invention.

In the figure: 1. Smoke exhaust rack; 2. Burning rack; 3. Blast rack; 4. Cooling rack;

Detailed ways

The present invention will be further described below in conjunction with accompanying drawing.

As shown in Figure 1, the present invention's roasting furnace turning furnace chamber is not equal to the periodic furnace moving operation and heating method, when the smoke exhaust rack 1 of the heating system enters the first and second furnace chambers before the connecting fire channel 5, the speed of this area is accelerated. The heating rate shortens the heating time, and the furnace moving period is 26 hours, and the furnace moving operation is carried out in advance; when the smoke exhaust rack 1 is moved to the first and second furnace chambers connected to the fire channel 5, the heating zone first adopts six chambers After running and heating for 26 hours, move the combustion rack 2 on the third heating furnace chamber to the third preheating furnace chamber in advance, and force heating for 8 hours. The smoke rack 1 is maintained for 34 hours in the first and second furnace chambers after the turn, which increases the preheating time of the preheating section. When the smoke rack 1 moves to the third furnace chamber after the turn, the original 30-hour furnace moving cycle and heating curve.

When the heating system enters the turning furnace chamber, the communication fire channel 5 also enters the heating system.

When the smoke exhaust rack 1 runs to the first two furnace chambers of the turning furnace chamber, the heating rate of the system is accelerated, and a 26-hour heating curve is adopted, so that the seventh and sixth furnace chambers before the turning furnace chamber can reach the roasting target of carbon blocks in advance Temperature, through two 26-hour heating curves, saving 8 hours of heating time, which is used to extend the heating time when the turning furnace chamber is running;

When the smoke exhaust rack runs to the first and second furnace chambers behind the turning furnace chamber, the system first uses chamber 6 to operate, and after the 26th hour of operation, move the combustion rack 2 of the third heating furnace chamber of the system to The third preheating furnace room adopts five-chamber operation, and the turning furnace room in the preheating section is forced to be heated for 8 hours. By prolonging the heating time of the preheating furnace room, the heating rate of the preheating furnace room is improved, and it is used for heating communication fire road.

Claims (6)

1. roaster turning furnace chamber does not wait the cycle to move furnace operating and temperature-rising method, it is characterized in that when the smoke evacuation frame of heating system gets into preceding two furnace chambers that are communicated with quirk, accelerating this regional heating rate; Shorten heat time heating time, adopts 26 hours move the stove cycle, during first and second furnace chambers after heating system gets into the connection quirk; Room 6 running heating 26 hours is at first adopted in the thermal treatment zone, in advance the burning rack in the 3rd heated oven chamber is moved to the 3rd preheating furnace chamber then, forces heating 8 hours; Adopt Room 5 running; Accelerate the heating rate of preheating section, first and second furnace chambers of frame after turning of discharging fume like this kept 34 hours, had increased the preheating time of preheating section; When the 3rd furnace chamber after moving to turning of smoke evacuation frame, recover to move in original 30 hours stove cycle and heating curve.

2. roaster turning furnace chamber according to claim 1 does not wait the cycle to move furnace operating and temperature-rising method; It is characterized in that described heating system is when the smoke evacuation frame moves to when being communicated with preceding two furnace chambers of quirk; The heating rate of quickening system makes to be communicated with the roasting target temperature that quirk the preceding the 7th and the 6th furnace chamber reach the carbon piece in advance, and shortening moves the stove cycle; Foreshorten to 26 hours by 30 hours, move furnace operating in advance.

3. roaster turning furnace chamber according to claim 1 does not wait the cycle to move furnace operating and temperature-rising method; It is characterized in that described heating system is when the smoke evacuation frame moves to when being communicated with preceding two furnace chambers of quirk; Move the stove cycle through shortening; Save 8 hours heat time heating time, be used to prolong the heat time heating time of turning furnace chamber.

4. roaster turning furnace chamber according to claim 1 does not wait the cycle to move furnace operating and temperature-rising method; It is characterized in that when system moves to first and second furnace chambers after being communicated with quirk; System at first uses Room 6 runnings, adopts and accelerates the roasting heating curve, and the 3rd the heated oven chamber's burning rack that moves to after 26th hour in advance system moves to the 3rd preheating furnace chamber; Adopt the running of five Room, preheating section turning furnace chamber was forced to heat 8 hours.

5. roaster turning furnace chamber according to claim 1 does not wait the cycle to move furnace operating and temperature-rising method; It is characterized in that method through twice six Room and five Room alternate runs; Prolonged the heat time heating time of turning furnace chamber preheating section; Improved the temperature of preheating furnace chamber, the tar and the fugitive constituent of separating out in the preheating furnace chamber carbon piece in the assurance system can burn in quirk, reduce the energy consumption level of turning furnace chamber and the discharge capacity of combustible.

6. roaster turning furnace chamber according to claim 1 does not wait the cycle to move furnace operating and temperature-rising method; It is characterized in that system moves the furnace operating cycle through shortening before getting into the turning furnace chamber; And the time that shortens is used to prolong the heat time heating time after heating system gets into the turning furnace chamber; Guarantee the consistent of in turning furnace chamber running institute service time and normal operation institute service time, do not influence the roaster production capacity.