Pot Furnace for Calcining Petroleum Coke at Low Temperature

Abstract

A pot furnace for calcining petroleum coke at low temperature may include a pot, and a cooling water jacket and a flame path below the pot. The flame path may include eight layers. An inlet of a first flame path layer may be in communication with a volatile channel in the front wall, and is provided with a first flame path layer flashboard. An eighth flame path layer may be in communication with a communication flue. Flue gas may be discharged out of the furnace body through a main flue. A furnace bottom cooling channel may be provided below the eighth flame path layer.

Claims

1. A pot furnace for calcining petroleum coke at low temperature, comprising a pot, and a cooling water jacket and a flame path below the pot, characterized in that the flame path includes eight layers; an inlet of a first flame path layer 5 is in communication with a volatile channel in the front wall, and is provided with a first flame path layer flashboard; an eighth flame path layer is in communication with a communication flue; flue gas is discharged out of the furnace body through a main flue; and a furnace bottom cooling channel is provided below the eighth flame path layer.

2. The pot furnace for calcining petroleum coke at low temperature according to claim 1, characterized in that the temperature of the first flame path layer is 1000-1200° C., the temperature of the second flame path layer is 1100-1250° C., the temperature of the third flame path layer is 1100-1200° C., the temperature of the fourth flame path layer is 1100-1200° C., the temperature of the fifth flame path layer is 1000-1150° C., the temperature of the sixth flame path layer is 1000-1150° C., the temperature of the seventh flame path layer is 900-1100° C., the temperature of the eighth flame path layer is 900-1100° C., and the exhaust smoke temperature is below 1000° C.

3. The pot furnace for calcining petroleum coke at low temperature according to claim 1, characterized in that the first flame path layer flashboard controls the amount of cold air into the flame path.

4. The pot furnace for calcining petroleum coke at low temperature according to claim 1, characterized in that preheated air within the furnace bottom cooling channel is discharged directly, without participating in supporting the combustion in the flame path.

5. The pot furnace for calcining petroleum coke at low temperature according to claim 1, characterized in that the negative pressure in the main flue reaches −250 Pa˜−300 Pa, the negative pressure in the eighth flame path layer reaches −120 Pa˜−150 Pa, and the negative pressure in the first flame path layer reaches −30 Pa˜−40 Pa.

Description

BRIEF DESCRIPTION OF THE DRAWING

[0013] FIG. 1 is a cross-sectional view of the flame path portion of the pot furnace of the present invention.

[0014] In the figure:

[0015] 1 flame path,

[0016] 2 cooling water jacket,

[0017] 3 volatile channel,

[0018] 4 the first flame path layer flashboard,

[0019] 5 the first flame path layer,

[0020] 6 the eighth flame path layer,

[0021] 7 furnace bottom cooling channel,

[0022] 8 main flue,

[0023] 9 communication flue,

[0024] 10 pots.

EMBODIMENTS

[0025] The present invention will be described below in detail with reference to the embodiments, which, however, do not limit the protection scope of the present invention.

[0026] The pot furnace for calcining petroleum coke at low temperatures as shown in FIG. 1 comprises a pot 10, and a cooling water jacket 2 and a flame path 1 below the pot 10. The flame path includes eight layers. The inlet of a first flame path layer 5 is in communication with a volatile channel 3 in the front wall, and is provided with a first flame path layer flashboard 4. An eighth flame path layer 6 is in communication with a communication flue 9. The flue gas is discharged out of the furnace body through a main flue 8. A furnace bottom cooling channel 7 is provided below the eighth flame path layer 6.

[0027] The temperature of the first flame path layer is 1000-1200° C., the temperature of the second flame path layer is 1100-1250° C., the temperature of the third flame path layer is 1100-1200° C., the temperature of the fourth flame path layer is 1100-1200° C., the temperature of the fifth flame path layer is 1000-1150° C., the temperature of the sixth flame path layer is 1000-1150° C., the temperature of the seventh flame path layer is 900-1100° C., the temperature of the eighth flame path layer is 900-1100° C., and the exhaust smoke temperature is below 1000° C.

[0028] The first flame path layer flashboard 4 controls the amount of cold air into the flame path.

[0029] Preheated air within the furnace bottom cooling channel 7 is discharged directly, without participating in supporting the combustion in the flame path.

[0030] The negative pressure in the main flue 8 reaches −250 Pa˜−300Pa, the negative pressure in the eighth flame path layer reaches −120 Pa˜−150 Pa, and the negative pressure in the first flame path layer reaches −30 Pa˜−40 Pa. A sufficiently large negative pressure ensures that sufficient cold air enters the flame path and reduces the temperature in the flame path. Meanwhile, a great negative pressure can improve the uniformity of temperatures in all flame path layers.

[0031] The calcination material petroleum coke in the pots 10 comes from top to bottom to undergo the whole calcination process. The high temperature flue gas flows in the flame path 1 to realize indirect heating of the petroleum coke, before being cooled by the cooling water jacket 2.

[0032] Cold air in the environment is sucked directly into the flame path through the first flame path layer as a result of the negative pressure in the flame path to support the combustion, ensuring that the temperature in the flame path is below 1250° C.