JPS5966485A - Treatment of red-hot coke - Google Patents

Abstract

PURPOSE:To use sensible heat of red-hot coke effectively, by feeding a group of coke in a red-hot state taken out from a coke oven to a separator, separating it two or more groups. CONSTITUTION:A group of coke in a red-hot state taken out from the coke oven 1 is fed to the screen classifier 2, and separated into coke having relatively small particle diameters and coke having particle diameters larger than it while the coke is hot. The coke having the smaller particle diameters separated by the screen classifier 2 is directly introduced into the combustion device 3 without being cooled. The combustion gas is introduced from the conduit 4 to the boiler 5. While, the coke having the larger particle diameters separated by the screen classifer 2 is introduced into the dry quencher 9, brought into contact with a cooling gas introduced from the conduit 7, cooled, and discharged out of the passageway 8. The cooling gas which is brought into contact with the red-hot coke and heated to a high temperature is introduced from the conduit 10 to the boiler 5, subjected to heat exchange, cooled, and circulated from the conduit 7 to the dry quencher 9 and used.

Description

[Detailed description of the invention] The present invention relates to a method for treating red-hot coke.

More specifically, the present invention relates to a method for treating red-hot coke that effectively utilizes the sensible heat of red-hot coke.

Conventionally, all of the red-hot coke discharged from a coke oven is introduced into a wet extinguishing system or a dry extinguishing system, cooled to room temperature, and then sieved and used for various purposes. .

In the coke that has been cooled, the diameter is 3㎜.
Several coefficients of coke lumps with small particle diameters were included, and the effective use of these particles was as high as 11. Among these small-particle coke, fine scratches can cause fine scratches in the cooling equipment, causing equipment blockage trouble, and coarse-particle coke has few uses, so industrially advantageous processing methods have emerged. was desired.

Due to the overflow, the present inventors obtained an effective gain of the small particle size coke.
By manually burning the coke, it is possible to avoid clogging troubles in the cooling system, and also to monitor the coke for different purposes ((Usage method)). ) thing bJ vomits.

I brought out a cup of red-hot coke.

Based on these findings (1), the present invention was completed.

The second invention is characterized in that the high-temperature combustion gas is recovered by directly introducing it into the combustion chamber, and the second invention is characterized in that coke with a small particle size that has been crushed in hot water is introduced into the combustion device i + 'f tangentially. 3. A method for treating red-hot coke according to a third aspect of the present invention, characterized in that the high-temperature coke residue is recovered by using a slag, and the coke has a diameter of 1].

The present invention will be explained below based on the drawings. FIG. 1 is a block diagram showing an example of an embodiment of the present invention. In the figure / is a coke oven 1. 2 is a surface separator, 3 is a combustion device, 5 is a boiler, 9 is a dry fire extinguishing system / Q -5Q 11111
The coke can be hot separated into coke with a relatively small particle size of about 100 yen or less and coke with a larger particle size. The sieve is usually made of cast iron or one type of fire material and has a circular, oval, or rectangular cross section.
Rods shaped like ladders are used, arranged at predetermined intervals with an inclination of 1, but these rods are hollow inside and a sufficient amount of cooling fluid flows through them to prevent deformation. That's nice. ``It would also be possible to use an i'ifi divider with the above rods arranged in a lattice pattern, or an inclined plate-like body with a large number of circular or rectangular holes or gaps. The small-particle coke separated in the sieve is sent directly to the combustion device t′i, without cooling. and burned. The combustion gas 4- is sent to the boiler S from the conduit. Depending on the particle size of the coke to be combusted, the combustion and dawn equipment 3 can be selected from among those that burn on a grate, those that use a fine powder burner, and those that burn in a fluidized state.

On the other hand, the large particles of coke 111'7) separated by the sieve separator are introduced into the dry fire extinguishing system, where they are cooled by coming into contact with the cooling gas introduced from dedicated V#7. t
It should be used more equally. The cooling gas, which has reached a high temperature due to contact with the red-hot coke, is introduced into the boiler S through the conduit lθ, where it is cooled by heat exchange and then circulated through the conduit 7 to the dry fire extinguishing system>k9. be done. Occurred in boiler S1
The steam is recovered from the end pipe A.

Dry fire extinguishing @169, example 21: It consists of a donut-shaped housing and a perforated plate that rotates horizontally inside the housing, and high-temperature particles are placed on the perforated plate and move inside the housing while the porous particles are placed on the perforated plate and moved inside the housing. A surgular type configured to be cooled by cooling waste supplied from below the plate. Temperature particles are supplied from above the hopper and are supplied from below the hopper while descending inside the hopper. A shaft-type device designed to be cooled by a cooling gas is used.

I have explained the combination of J knit, combustion, dry fire extinguishing, and boiler, but instead of the boiler, it is possible to use a dry extinguisher, gas turbine, etc., and there is also a small silk combination II. You can do it. In addition, the fuel ψ obtained from the combustion device η3 may be combined with the gas E'jJt/0 and used alone.

In the combustion device 63, if fuels such as heavy oil, coal, coal gas, waste gas, waste materials, etc. can be burned or co-combusted, fluctuations and inconsistencies in the operating rate of the coke oven can be avoided. Continuous kiln unloading schedule, even in case of emergency trouble, by adjusting the amount of auxiliary fuel, stable high-temperature scum can be obtained, which is good. Of course, it is possible to use an integrated combustion device and boiler.

Red-hot, large-particle coke can be cooled by wet extinguishing with water spray, and in some cases, it can also be used as is by being supplied to a shattered blast furnace without cooling.

Divide into two or more groups without grading, introduce one directly into the combustion equipment without cooling, collect high-temperature combustion residue, and cool the other groups by dry or wet extinguishing; #
l fIt can be used for other purposes.

Since the particle size is separated according to each application, for example, when obtaining coke by dry extinguishing, the particle size distribution in the cooling equipment is evened out, so there is less uneven flow of the cooling gas. Nari? ; The crystals of the cooled coke become uniform. The closure of the powder bin inside the cooling system can be made smaller as well as the dust bin from the gas. Furthermore, since the pressure point of the cooling gas in the trap within the cooling device is small, there is also the advantage that the installation of a gas transport system such as a blower can be made smaller.

In addition, since the station that supplies red-hot coke to the blast furnace excludes coke of small particle size, the pressure inside the blast furnace is
This has the advantage of reducing losses.

Furthermore, when coke with a relatively small particle size or a group of cokes divided without being classified is burned, the sensible heat contained in the red-hot coke discharged from the kiln can be burned without cooling. It has the advantage that energy can be recovered effectively.

[Brief explanation of the drawing]

FIG. 2 is a block diagram showing an example of an actual embodiment of the present invention; /: Coke oven 2: Sieve separator 3: Combustion device Ta: Boiler 9: Dry fire extinguishing system 8- Continued from page 1 ■Inventor Takahisa Fukao To Kitakyushu City Mitsubishi Chemical Corporation, 2447-1 Fujita, Hatanishi-ku Inventor: Katsunari Yoshida, Kitakyushu City, 2447 Oaza Fujita, Hatanishi-ku, Mitsubishi Chemical Industries, Ltd. Kurosaki Plant, Q: Inventor: Shinji Kawaguchi, Kitakyushu City: 1, 2447 Fujita, Hatanishi Ward, Mitsubishi Chemical Industries, Ltd. Inside the company's Kurosaki factory

Claims (4)

[Claims] (1) A method for treating red-hot coke, which comprises supplying a group of red-hot coke discharged from a coke oven to a separator and separating it into two or more groups of coke while hot. (2) The method for treating red-hot coke according to claim 1, characterized in that a sieve is used as the separator. (3) A group of coke in a red-hot state taken out of a coke oven from a kiln is supplied to a separator, where it is hot separated into two or more groups of coke, and at least one group of separated coke is directly introduced into a combustion device. A method for treating red-hot coke, which is characterized by recovering high-temperature combustion residue. (4) Use a sieve as a separator to hot separate coke into small-sized coke and larger-sized coke, and directly introduce the former into the combustion equipment to recover high-temperature combustion gas. Treatment of red-hot coke according to claim 3, characterized in that coke is fed to a sieve and is hot separated into coke of small particle size and coke of larger particle size, and the former is separated into coke of small particle size and coke of larger particle size. A method for processing red-hot coke, characterized by directly introducing it into a combustion device to recover high-temperature combustion gas, and then introducing the gas into a fire extinguishing device to cool it.