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

Abstract

The present invention relates to a coke cooling structure and a coke cooling method in a dry quenching furnace, wherein the coke cooling structure comprises an air supply device, a partition wall, a partition wall supporting device and an umbrella-shaped gas collecting hood; the pre-storage section in the dry quenching furnace is directly connected to the inner wall of the furnace body of the cooling section; the partition wall is arranged in the cooling section, and the cooling section is evenly divided into at least two independent cooling chambers along the circumferential direction; a cooling gas discharge port is arranged in the center of the partition wall along the height direction, and an umbrella-shaped gas collecting hood is arranged above the cooling gas discharge port; 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 present invention eliminates the inclined channel area and the annular air duct of the traditional dry quenching furnace, and the cooling gas is discharged from the air flow outlet channel in the partition wall, thereby increasing the furnace body structural strength of the dry quenching furnace, being beneficial to extending the service life of the dry quenching furnace, and improving the cooling efficiency of the cooling section and the uniformity of coke cooling.

Description

Technical Field

[0001] The invention relates to the technical field of coke dry quenching, and in particular to a coke cooling structure and a coke cooling method in a 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 coke cooling structure and a coke cooling method in a dry quenching furnace, which eliminate the inclined channel area and the annular air duct of a traditional dry quenching furnace, arrange a partition wall in the furnace body of a cooling section, and lead the cooling gas out from the air flow lead-out channel in the partition wall, thereby increasing the structural strength of the furnace body of the dry quenching furnace, being beneficial to extending the service life of the dry quenching furnace, and improving the cooling efficiency of the cooling section and the uniformity of coke cooling.

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

[0007] A coke cooling structure in a dry quenching furnace comprises an air supply device arranged at the bottom of the dry quenching furnace; further comprising a partition wall, a partition wall supporting device and an umbrella-shaped gas collecting hood; 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 of the cooling section; the partition wall is arranged in the cooling section and above the air supply device, and the partition wall divides the cooling section into at least two independent cooling chambers along the circumferential direction; the partition wall is fixed in the furnace body of the dry quenching furnace through the partition wall supporting device; a cooling gas discharge port is arranged in the center of the partition wall along the height direction, and an umbrella-shaped gas collecting hood is arranged above the cooling gas discharge port; 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 partition wall is built by refractory masonry or cast by refractory material.

[0009] The partition wall supporting device is supported and fixed on the inner wall of the furnace body of the cooling section and / or the cone bucket.

[0010] The partition wall support device is composed of multiple columns and annular support beams, the bottom of the column is fixedly connected to the inner wall of the conical bucket furnace body, the top of the column is fixedly connected to the bottom of the annular support beam, and the outer side of the annular support beam is fixedly connected to the inner wall of the cooling section furnace body.

[0011] The partition wall supporting device is made of refractory material or aluminate cement material, or is made of a composite material with an upper layer of refractory material, an intermediate layer of aluminate cement material, and a lower layer of refractory material.

[0012] The umbrella-shaped gas collecting hood is fixed on the top of the partition wall, and is made of a refractory material or a metal material, or is a composite structure composed of a refractory material and a metal material.

[0013] A coke cooling method comprising:

[0014] During the dry quenching process, red coke is loaded into the dry quenching furnace from the top, and low-temperature inert gas is blown into the dry quenching furnace through the air supply device under the action of the circulating fan; it enters each cooling chamber respectively to contact with the red coke and absorb the sensible heat of the red coke; the cooled coke is discharged through the cone hopper and the coke discharge device; the high-temperature inert gas after absorbing the sensible heat of the red coke rises to the top of the cooling chamber and is 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, and enters the dry quenching boiler for heat exchange after primary dust removal. The cooled inert gas is blown back into the dry quenching furnace by the circulating fan for recycling after secondary dust removal.

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

[0016] 1) The annular air duct and inclined area in the conventional CDQ furnace are eliminated, the unstable factors are eliminated, and the CDQ furnace forms a self-stabilizing structure;

[0017] 2) The cooling section of the CDQ furnace is divided into several cooling chambers by a partition wall, so that the cooling gas entering from the lower gas supply device is distributed more evenly in the cooling section, which is conducive to uniform cooling of the coke;

[0018] 3) The partition wall inside the CDQ furnace is composed of vertical walls and supported by partition wall support devices. The wall structure has high strength and long service life;

[0019] 4) Since the inclined area and the annular air duct are eliminated, the structure of the CDQ furnace is simplified and easier to construct, thereby reducing the construction and maintenance costs of the CDQ furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front cross-sectional view of a coke cooling structure in a dry quenching furnace 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. Gas supply device 3. Partition wall 4. Partition wall support device 5. Cooling gas outlet 6. Umbrella-shaped gas collecting hood 7. Air flow outlet channel 8. Annular gas 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 4As shown, a coke cooling structure in a dry quenching furnace described in the present invention comprises an air supply device 2 arranged at the bottom of the dry quenching furnace 1; it also comprises a partition wall 3, a partition wall supporting device 4 and an umbrella-shaped gas collecting hood 6; 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; the partition wall 3 is arranged in the cooling section and above the air supply device 2, and the partition wall 3 divides the cooling section into at least two independent cooling chambers along the circumferential direction; the partition wall 3 is fixed in the furnace body of the dry quenching furnace 1 through the partition wall supporting device 4; a cooling gas outlet 5 is arranged in the center of the partition wall 3 along the height direction, and an umbrella-shaped gas collecting hood 6 is arranged above the cooling gas outlet 5; an airflow outlet channel 7 is arranged in the partition wall 3 along the radial direction of the dry quenching furnace 1, the inner end of the airflow outlet channel 7 is connected to the cooling gas outlet 5, and the outer end of the airflow outlet channel 7 is connected to the cooling gas circulation system of the dry quenching furnace.

[0027] The partition wall 3 is built by refractory masonry or cast by refractory material.

[0028] The partition wall supporting device 4 is supported and fixed on the inner wall of the furnace body of the cooling section and / or the cone bucket.

[0029] The partition wall support device 4 is composed of a plurality of columns and annular support beams, the bottom of the columns are fixedly connected to the inner wall of the conical bucket furnace body, the top of the columns are fixedly connected to the bottom of the annular support beam, and the outer side of the annular support beam is fixedly connected to the inner wall of the cooling section furnace body.

[0030] The partition wall supporting device 4 is made of refractory material or aluminate cement material, or is made of a composite material with an upper layer of refractory material, an intermediate layer of aluminate cement material, and a lower layer of refractory material.

[0031] The umbrella-shaped gas collecting hood 6 is fixed on the top of the partition wall 3 , and the umbrella-shaped gas collecting hood 6 is made of a refractory material or a metal material, or is a composite structure composed of a refractory material and a metal material.

[0032] A coke cooling method comprising:

[0033] 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 the air supply device 2 under the action of the circulating fan; it enters each cooling chamber respectively to contact with the red coke to absorb the sensible heat of the red coke; the cooled coke is discharged through the cone hopper and the coke discharge device; the high-temperature inert gas after absorbing the sensible heat of the red coke rises to the top of the cooling chamber and is collected by the umbrella-shaped gas collecting hood 6, 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 7 in the partition wall 3, and enters the dry quenching boiler for heat exchange after primary dust removal. The cooled inert gas is blown back into the dry quenching furnace 1 by the circulating fan for recycling after secondary dust removal.

[0034] The present invention describes a coke cooling structure in a dry quenching furnace, wherein an air supply device 2 (conventional setting) in the dry quenching furnace 1 is used to supply cooling gas into the dry quenching furnace 1, and the cooling section in the dry quenching furnace 1 is divided into a plurality of cooling cavities by a partition wall 3, and an umbrella-shaped gas collecting hood 6 is provided on the top of the partition wall 3.

[0035] Compared with the existing conventional dry quenching furnace structure, the coke cooling structure in the dry quenching furnace of the present invention eliminates the ramp area and the annular air duct. A gas discharge device consisting of an umbrella-shaped gas collecting hood 6 and a partition wall 3 is added to the lower part of the dry quenching furnace 1, and a cooling gas discharge port 5 is provided in the middle of the partition wall 3 below the umbrella-shaped gas collecting hood 6. The cooling gas discharge port 5 is located in the space formed by the natural accumulation of coke under the umbrella-shaped gas collecting hood 6 during the downward cooling process.

[0036] In order to evenly distribute the cooling gas in the dry quenching furnace 1, and to fix the umbrella-shaped gas collecting hood 6 and set the airflow outlet channel 7, a partition wall 3 is set below the umbrella-shaped gas collecting hood 6. The partition wall 3 is supported by a partition wall support device 4, and the partition wall support device 4 is fixedly connected to the cone bucket of the dry quenching furnace 1 or the inner wall of the furnace body of the cooling section. The number of partition walls 3 is 1 or more, which is used to divide the cooling section of the dry quenching furnace 1 into 2 or more independent cooling cavities to form a multi-cavity cooling structure.

[0037] The cooling gas discharged from the multiple air flow guide channels 7 can be collected separately or collected through the annular gas collecting pipe 8, and then enter the dry quenching furnace cooling gas circulation system. The dry quenching furnace cooling gas circulation system is usually composed of a primary dust removal device, a dry quenching boiler, a secondary dust removal device and a circulating fan. The cooling gas after dust removal and temperature reduction is returned to the dry quenching furnace 1 through the air supply device 2 for recycling.

[0038] 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 coke cooling structure in a dry quenching furnace, comprising an air supply device arranged at the bottom of the dry quenching furnace; characterized in that: It also includes a partition wall, a partition wall supporting device and an umbrella-shaped gas collecting hood; 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 of the cooling section; the partition wall is arranged in the cooling section and above the gas supply device, and the partition wall divides the cooling section into at least two independent cooling chambers evenly along the circumferential direction; the partition wall is fixed in the furnace body of the dry quenching furnace through the partition wall supporting device; a cooling gas discharge port is arranged in the center of the partition wall along the height direction, and an umbrella-shaped gas collecting hood is arranged above the cooling gas discharge port; 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.

2. The coke cooling structure in a dry quenching furnace according to claim 1, characterized in that: The partition wall is built by refractory masonry or cast by refractory material.

3. The coke cooling structure in a dry quenching furnace according to claim 1, characterized in that: The partition wall supporting device is supported and fixed on the inner wall of the furnace body of the cooling section and / or the cone bucket.

4. The coke cooling structure in a dry quenching furnace according to claim 1, characterized in that: The partition wall support device is composed of multiple columns and annular support beams, the bottom of the column is fixedly connected to the inner wall of the conical bucket furnace body, the top of the column is fixedly connected to the bottom of the annular support beam, and the outer side of the annular support beam is fixedly connected to the inner wall of the cooling section furnace body.

5. A coke cooling structure in a dry quenching furnace according to claim 1, 3 or 4, characterized in that: The partition wall supporting device is made of refractory material or aluminate cement material, or is made of a composite material with an upper layer of refractory material, an intermediate layer of aluminate cement material, and a lower layer of refractory material.

6. The coke cooling structure in a dry quenching furnace according to claim 1, characterized in that: The umbrella-shaped gas collecting hood is fixed on the top of the partition wall, and is made of a refractory material or a metal material, or is a composite structure composed of a refractory material and a metal material.

7. A coke cooling method based on the coke cooling structure in any one of claims 1 to 6 in a dry quenching furnace, 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 the gas supply device under the action of the circulating fan; The inert gases enter the cooling chambers respectively, come into contact with the red coke and absorb the sensible heat of the red coke. The cooled coke is discharged through the cone hopper and the coke discharge device. The high-temperature inert gas after absorbing the sensible heat of the red coke rises to the top of the cooling chamber and is collected by the umbrella-shaped gas collecting hood, then returns downward to the cooling gas discharge port. The inert gases are discharged from the dry quenching furnace through the air flow outlet channel in the partition wall, and enter the dry quenching boiler for heat exchange after primary dust removal. The cooled inert gases are re-blown into the dry quenching furnace by the circulating fan for recycling after secondary dust removal.

Images