A dry quenching furnace structure and a coke cooling method in the dry quenching furnace

Abstract

The present invention relates to a dry quenching furnace structure and a method for cooling coke in the dry quenching furnace, wherein the dry quenching furnace is provided with at least one partition wall at the upper part of the cone bucket and in the cooling section, and the space is divided into at least two cooling chambers along the circumference of the dry quenching furnace; an air supply device is provided at the lower part of each cooling chamber at the position corresponding to the cone bucket; an umbrella-shaped gas collecting hood is provided at the top center of the partition wall, a cooling gas outlet is provided at the center of the partition wall below the umbrella-shaped gas collecting hood, an air flow outlet channel is provided in the partition wall along the radial direction of the dry quenching furnace, the inner end of the air flow outlet channel is connected to the cooling gas outlet, and the outer end of the air flow outlet channel is connected to the cooling gas circulation system of the dry quenching furnace. The present invention eliminates the inclined channel area and the annular air duct of the traditional dry quenching furnace; the cooling gas after heat exchange with the red coke is discharged through the air flow outlet channel in the partition wall; the dry quenching furnace has high structural strength, long service life, can adjust the temperature by partition, and has good coke cooling uniformity.

Description

Technical Field

[0001] The invention relates to the technical field of dry quenching coke, and in particular to a dry quenching furnace structure and a method for cooling coke in the dry quenching furnace. Background Art

[0002] In the traditional CDQ furnace structure, an annular air duct is provided between the pre-storage section and the cooling section of the furnace body, and the annular air duct is connected to the furnace body through the ramp area; however, during the production process, the inner ring wall constituting the annular air duct is easily damaged; the main reasons are as follows: 1) The corbels in the ramp area of ​​the CDQ furnace are cantilevered structures layer by layer, and the load-bearing structure is relatively thin and has poor strength; 2) The inner ring wall of the annular air duct is often impacted by the falling materials in the furnace; 3) The temperature distribution in the ramp area is uneven, and the ramp corbels are easily damaged by thermal stress.

[0003] At present, the method of strengthening the strength of the annular air duct structure is usually to add a complex groove structure to the inner ring wall bricks to fix the brick walls in their respective positions. The inclined channel corbel is mainly built with refractory materials with higher compressive strength and better thermal shock stability. In general, the inclined channel corbel needs to be repaired every two years or so, and needs to be overhauled and replaced every five years.

[0004] In addition, with the large-scale coke ovens, CDQ furnaces are also gradually developing in the direction of large-scale, and the problem of uniform distribution of cooling gas in the lower part of the cooling section of the CDQ furnace is becoming more and more difficult to solve. Summary of the invention

[0005] The present invention provides a dry quenching furnace structure and a method for cooling coke in the dry quenching furnace, which eliminate the inclined channel area and the annular air duct of the traditional dry quenching furnace; the cooling section is divided into a plurality of cooling chambers, each cooling chamber is provided with an air supply device, and the cooling gas after heat exchange with the red coke is discharged through the air flow outlet channel in the partition wall; the dry quenching furnace has high structural strength and long service life, the temperature can be adjusted by partition, and the coke cooling uniformity is good.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A dry quenching furnace structure comprises a dry quenching furnace; the dry quenching furnace is composed of a furnace top, a pre-storage section, a cooling section and a cone bucket connected in sequence from top to bottom, wherein the pre-storage section is directly connected to the furnace body inner wall of the cooling section; at least one partition wall is arranged in the upper part of the cone bucket and in the cooling section, and this part of the space is divided into at least two cooling chambers along the circumference of the dry quenching furnace; an air supply device is arranged in the lower part of each cooling chamber at the position corresponding to the cone bucket; an umbrella-shaped gas collecting hood is arranged at the center position of the top of the partition wall, a cooling gas discharge port is arranged at the center of the partition wall below the umbrella-shaped gas collecting hood, an air flow outlet channel is arranged in the partition wall along the radial direction of the dry quenching furnace, the inner end of the air flow outlet channel is connected to the cooling gas discharge port, and the outer end of the air flow outlet channel is connected to the cooling gas circulation system of the dry quenching furnace.

[0008] The supporting wall is built by refractory masonry or cast by refractory material.

[0009] The umbrella-shaped gas collecting hood is made of refractory material or metal material, or is a composite structure composed of refractory material and metal material.

[0010] The number of the partition walls is 1 to 3.

[0011] The cross sections of the cooling gas outlet and the airflow outlet channel are both rectangular.

[0012] A method for cooling coke in a dry quenching furnace, comprising:

[0013] During the dry quenching process, red coke is loaded from the top of the dry quenching furnace, and low-temperature inert gas is blown into the dry quenching furnace through various air supply devices under the action of the circulating fan; the low-temperature inert gas blown from each air supply device enters the corresponding cooling chamber above and contacts with the red coke to absorb the sensible heat of the red coke; the cooled coke is discharged uniformly through the coke discharge device at the bottom of the cone hopper; the high-temperature inert gas after absorbing the sensible heat of the red coke rises to the top of each cooling chamber and is uniformly collected by the umbrella-shaped gas collecting hood, and then returns downward to enter the cooling gas discharge port; it is discharged from the dry quenching furnace through the air flow outlet channel in the partition wall, enters the dry quenching boiler for heat exchange after primary dust removal, and the cooled inert gas is re-blown into the dry quenching furnace by the circulating fan for recycling after secondary dust removal;

[0014] By adjusting the amount of low-temperature inert gas supplied by each gas supply device, the cooling temperature of the coke in each part of the CDQ furnace can be accurately adjusted, and ultimately the coke in the CDQ furnace can be evenly cooled.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1) Compared with conventional CDQ furnaces, the ramp area and annular air duct are eliminated, making the structure of the CDQ furnace more stable and the furnace body stronger;

[0017] 2) The cooling section is divided into multiple cooling chambers, and each cooling chamber is provided with a corresponding air supply device, so that the temperature can be adjusted in different zones, and the coke cooling is uniform;

[0018] 3) The partition wall inside the CDQ furnace is composed of vertical walls, and the wall has a long service life;

[0019] 4) Since the ramp area and the annular air duct are eliminated, the construction difficulty is greatly reduced and the construction efficiency is improved, thereby reducing the CDQ furnace investment and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front cross-sectional view of a dry quenching furnace structure described in the present invention.

[0021] Figure 2 yes Figure 1 AA view in.

[0022] Figure 3 yes Figure 1 BB view in.

[0023] Figure 4 yes Figure 1 The CC view in .

[0024] In the figure: 1. CDQ furnace 2. Partition wall 3. Air supply device 4. Umbrella-shaped air collecting hood 5. Cooling gas outlet 6. Air flow outlet channel 7. Annular air collecting pipe DETAILED DESCRIPTION

[0025] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings:

[0026] like Figure 1-Figure 4 As shown, a dry quenching furnace structure described in the present invention includes a dry quenching furnace 1; the dry quenching furnace 1 is composed of a furnace top, a pre-storage section, a cooling section and a cone bucket connected in sequence from top to bottom, wherein the pre-storage section is directly connected to the furnace body of the cooling section; at least one partition wall 2 is arranged in the upper part of the cone bucket and in the cooling section, and this part of the space is divided into at least two cooling chambers along the circumference of the dry quenching furnace 1; an air supply device 3 is arranged at the lower part of each cooling chamber at the position corresponding to the cone bucket; an umbrella-shaped air collecting hood 4 is arranged at the center position of the top of the partition wall 2, and a cooling gas outlet 5 is arranged at the center of the partition wall 2 below the umbrella-shaped air collecting hood 4, and an air flow outlet channel 6 is arranged in the partition wall 2 along the radial direction of the dry quenching furnace 1, the inner end of the air flow outlet channel 6 is connected to the cooling gas outlet 5, and the outer end of the air flow outlet channel 6 is connected to the dry quenching furnace cooling gas circulation system.

[0027] The partition wall 2 is built by refractory masonry or cast by refractory material.

[0028] The umbrella-shaped gas collecting hood 4 is made of refractory material or metal material, or a composite structure composed of refractory material and metal material.

[0029] The number of the partition walls 2 is 1 to 3.

[0030] The cross sections of the cooling gas outlet 5 and the air flow outlet channel 6 are both rectangular.

[0031] A method for cooling coke in a dry quenching furnace, comprising:

[0032] During the dry quenching process, red coke is loaded from the top of the dry quenching furnace 1, and low-temperature inert gas is blown into the dry quenching furnace 1 through each gas supply device 3 under the action of the circulating fan; the low-temperature inert gas blown from each gas supply device 3 enters the corresponding cooling chamber above and contacts with the red coke to absorb the sensible heat of the red coke; the cooled coke is discharged uniformly through the coke discharge device at the bottom of the cone hopper; the high-temperature inert gas after absorbing the sensible heat of the red coke rises to the top of each cooling chamber and is uniformly collected by the umbrella-shaped gas collecting hood 4, and then returns downward to enter the cooling gas discharge port 5; it is discharged from the dry quenching furnace 1 through the air flow outlet channel 6 in the partition wall 2, enters the dry quenching boiler for heat exchange after primary dust removal, and the cooled inert gas is re-blown into the dry quenching furnace 1 by the circulating fan for recycling after secondary dust removal;

[0033] By adjusting the amount of low-temperature inert gas supplied by each gas supply device 3 , the cooling temperature of the coke in each part of the dry quenching furnace 1 can be accurately adjusted, and finally the coke in the dry quenching furnace 1 can be evenly cooled.

[0034] The novel dry quenching furnace structure described in the present invention eliminates the ramp area and the annular air duct in the existing conventional dry quenching furnace structure. A gas exhaust device is added inside the dry quenching furnace. The gas exhaust device includes a partition wall 2 and an umbrella-shaped gas collecting hood 4; a cooling gas exhaust port 5 is provided at the center of the partition wall 2 below the umbrella-shaped gas collecting hood 4, and the cooling gas exhaust port 5 is located in the space formed by natural accumulation under the umbrella-shaped gas collecting hood 4 during the downward cooling process of coke.

[0035] In order to achieve zoned temperature-controlled cooling, and to fix the umbrella-shaped gas collecting hood 4 and set the airflow outlet channel 6, a partition wall 2 is set below the umbrella-shaped gas collecting hood 4. The outer end of the partition wall 2 is fixedly connected to the inner wall of the furnace body of the cooling section of the dry quenching furnace 1, and the bottom is supported on the furnace body at the cone bucket part of the dry quenching furnace 1. There is at least one partition wall 2, which divides the cooling section into at least two cooling chambers. An air supply device 3 is set at the corresponding cone bucket part under each cooling chamber. Each air supply device 3 can be adjusted separately, so as to better improve the fluidity of the cooling gas and the uniformity of coke cooling.

[0036] The cooling gas (high-temperature inert gas) discharged from each gas flow outlet channel 6 can be connected to the cooling gas circulation pipeline through pipelines respectively, or can be collected by the annular gas collecting pipe 7 and then sent to the cooling gas circulation pipeline.

[0037] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A dry quenching furnace structure, comprising a dry quenching furnace; characterized in that: The dry quenching furnace is composed of a furnace top, a pre-storage section, a cooling section and a cone bucket which are connected in sequence from top to bottom, wherein the pre-storage section is directly connected to the furnace body inner wall of the cooling section; at least one partition wall is arranged on the upper part of the cone bucket and in the cooling section, and this part of the space is divided into at least two cooling chambers along the circumference of the dry quenching furnace; an air supply device is arranged at the lower part of each cooling chamber at the position corresponding to the cone bucket, and each air supply device is adjusted separately; an umbrella-shaped gas collecting hood is arranged at the top center position of the partition wall, a cooling gas discharge port is arranged at the center of the partition wall below the umbrella-shaped gas collecting hood, an air flow outlet channel is arranged in the partition wall along the radial direction of the dry quenching furnace, the inner end of the air flow outlet channel is connected to the cooling gas discharge port, and the outer end of the air flow outlet channel is connected to the cooling gas circulation system of the dry quenching furnace; the partition wall is built of refractory masonry, or is cast by refractory material; the umbrella-shaped gas collecting hood is made of refractory material or metal material, or is a composite structure composed of refractory material and metal material.

2. A dry quenching furnace structure according to claim 1, characterized in that: The number of the partition walls is 1 to 3.

3. A dry quenching furnace structure according to claim 1, characterized in that: The cross-sections of the cooling gas outlet and the airflow outlet channel are polygonal or circular.

4. A method for cooling coke in a dry quenching furnace based on the dry quenching furnace structure according to any one of claims 1 to 3, characterized in that: include: During the dry quenching process, red coke is loaded from the top of the dry quenching furnace, and low-temperature inert gas is blown into the dry quenching furnace through various gas supply devices under the action of the circulating fan; The low-temperature inert gas blown in from each gas supply device enters the corresponding cooling chamber above and contacts with the red coke to absorb the sensible heat of the red coke; the cooled coke is discharged uniformly through the coke discharge device at the bottom of the cone bucket; the high-temperature inert gas after absorbing the sensible heat of the red coke rises to the top of each cooling chamber and is collected uniformly by the umbrella-shaped gas collecting hood, then returns downward to enter the cooling gas discharge port; it is discharged from the dry quenching furnace through the air flow outlet channel in the partition wall, enters the dry quenching boiler for heat exchange after primary dust removal, and the cooled inert gas is re-blown into the dry quenching furnace by the circulating fan for recycling after secondary dust removal; By adjusting the amount of low-temperature inert gas supplied by each gas supply device, the cooling temperature of the coke in each part of the CDQ furnace can be accurately adjusted, and ultimately the coke in the CDQ furnace can be evenly cooled.

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