Anti-blow-by coke oven regenerative chamber structure and construction method thereof

Abstract

The invention relates to an anti-blow-by coke oven regenerative chamber structure and a construction method thereof, a combustion chamber is divided into a plurality of different temperature intervals from the lower part to the bottom of the regenerative chamber, and the temperature intervals sequentially comprise a high-temperature area, a medium-temperature area, a low-temperature area and a low-temperature area from top to bottom; the gas pipeline airflow channels corresponding to all the temperature intervals are staggered, and a high-temperature-resistant metal hose is arranged in the gas pipe brick airflow channel corresponding to the same vertical flame path from top to bottom in a full-length mode; and sliding layers are arranged among the brickworks in different temperature intervals. According to the invention, gas supply blowby caused by mortar joint tearing or gas pipe brick breakage due to displacement between the upper and lower layer gas pipe bricks in the main wall of the regenerative chamber of the coke oven caused by different expansion during the oven drying period or the residual expansion period of the coke oven can be prevented, and smooth and safe production of the large coke oven is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of coke oven construction, and in particular to a leakage-proof coke oven regenerator structure and a construction method thereof. Background Art

[0002] As coke ovens develop towards large-scale, the length of coke ovens and the height of heat storage chambers also increase. The heat storage chamber of a coke oven is generally composed of a main wall, a single wall, a partition wall, a checker brick, etc. For a bottom-spraying coke oven, in addition to the main function of gas heat exchange, the heat storage chamber is also provided with a gas pipe brick airflow channel (formed by multiple layers of gas pipe bricks) in the main wall, which is used to provide bottom-spraying gas from the bottom of the coke oven to the coke oven combustion chamber. As the length of the coke oven increases, the number of vertical fire channels increases accordingly. Multiple vertical fire channels are set in the same combustion chamber. Gas is supplied to multiple gas pipe brick airflow channels simultaneously through the basement horizontal pipe, and the gas injected from the bottom burns simultaneously in multiple vertical fire channels. As the height of the heat storage chamber increases, the number of gas pipe bricks corresponding to the bottom-spraying gas pipe brick airflow channel of each vertical fire channel also increases accordingly.

[0003] At present, the layers of gas pipe bricks that make up the gas pipe brick airflow channel are mostly built layer by layer in the form of brick grooves and brick tongues. However, due to the increase in the length of large coke ovens, the coke oven changes from a cold state to a hot state during the baking process. Under the condition of a fixed material expansion rate, the expansion amount increases accordingly. In addition, the material of the gas pipe bricks is different from the material of the main wall refractory material. Under the condition of different material expansion rates, the expansion amount of the gas pipe bricks and the main wall is different, resulting in gaps between the gas pipe bricks and the main wall due to tension cracking. In mild cases, leakage occurs between the gas pipe bricks. In severe cases, the gas pipe bricks may even rupture under the action of shear force. It is difficult to repair the gas pipe bricks after rupture, and leakage and rupture of the gas pipe bricks will directly cause the corresponding vertical fire channel to lose the downward spray gas and become a dead hole. Summary of the invention

[0004] The present invention provides a leakage-proof coke oven regenerator structure and a construction method thereof, which can prevent displacement between upper and lower gas pipe bricks in the main wall of the coke oven regenerator due to different expansion during oven baking or residual expansion of the coke oven, thereby preventing gas leakage caused by tearing of mortar joints or rupture of gas pipe bricks, thereby ensuring smooth and safe production of large coke ovens.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A coke oven regenerator structure for preventing leakage, wherein the top of the regenerator of the coke oven is connected to the bottom of the combustion chamber through an inclined channel area, the combustion chamber is composed of multiple vertical fire channels, each of which is provided with a downward-spraying coal gas inlet, which is connected to a basement gas horizontal pipe arranged below the regenerator through a gas pipe brick airflow channel, and the gas pipe brick airflow channel is formed by laying multiple layers of gas pipe bricks; a plurality of different temperature zones are divided from the bottom of the combustion chamber to the bottom of the regenerator, including a high temperature zone, a medium temperature zone, a relatively low temperature zone and a low temperature zone from top to bottom; the gas pipeline airflow channels corresponding to each temperature zone are staggered, and a high-temperature resistant metal hose is arranged from top to bottom in the gas pipe brick airflow channel corresponding to the same vertical fire channel; a sliding layer is arranged between the masonry in different temperature zones.

[0007] The upper part of the heat storage chamber is divided into a low temperature zone, the upper part of the heat storage chamber is divided into a relatively low temperature zone; the ramp zone is divided into a medium temperature zone; and the lower part of the combustion chamber is divided into a high temperature zone.

[0008] The top surface and the bottom surface of the gas pipe brick are both flat.

[0009] The main walls of the heat storage chamber are all built with gas pipe bricks.

[0010] The sliding layer consists of asphalt felt and a concrete layer arranged between the asphalt felt and the gas pipe brick.

[0011] The high temperature resistant metal hose is provided with expansion joints at the joints of the air flow passages of each section of the gas pipe brick.

[0012] A construction method for a leak-proof coke oven regenerator structure comprises the following steps:

[0013] 1) According to the temperature of the coke oven during normal production and the thermal expansion curve of the gas pipe brick refractory material constituting the main wall of the regenerator, the coke oven is divided from the lower part of the combustion chamber to the bottom of the regenerator into a high temperature zone, a medium temperature zone, a low temperature zone and a low temperature zone;

[0014] 2) According to the temperature of the area where the gas pipe bricks are located and the refractory expansion rate of the gas pipe bricks, calculate the thermal expansion displacement of the gas pipe bricks during the process from the cold state to the hot state of the coke oven;

[0015] 3) When the coke oven is built, the gas pipe bricks in each temperature range are vertically aligned to form a through gas pipe brick airflow channel; the gas pipe brick airflow channels of two adjacent temperature ranges are staggered;

[0016] 4) When laying two layers of gas pipe bricks in adjacent temperature ranges, first connect the high temperature resistant metal hose in the air flow channel of the upper gas pipe brick with the high temperature resistant metal hose in the air flow channel of the lower gas pipe brick; and set a layer of asphalt felt at the joint surface of the upper and lower gas pipe bricks, and apply plaster on one side of the gas pipe brick in contact with the asphalt felt to form a sliding layer;

[0017] 5) During the coke oven baking process, the main wall as a whole moves from the center of the oven to the two sides of the machine coke under the action of thermal expansion, and the gas pipeline airflow channels of the two adjacent temperature intervals slide relatively, and the high-temperature resistant metal hose is used to ensure that the gas pipe brick airflow channels in each temperature interval remain unobstructed; after the thermal expansion is completed, the gas pipeline airflow channels corresponding to each temperature interval are vertically aligned and connected.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1) Changed the brick groove and brick tongue connection method used in conventional gas pipe bricks to prevent the gas pipe bricks from breaking due to the shear force between the upper and lower gas pipe bricks during expansion;

[0020] 2) The volume of the gas pipe bricks is increased, and the silicon refractory bricks between the gas pipe bricks in the main wall of the same layer of the regenerator are eliminated. The two gas pipe bricks are arranged adjacent to each other, that is, the main wall of the regenerator is entirely built with gas pipe bricks, so that the expansion of the main wall in the same temperature range remains consistent;

[0021] 3) A high-temperature resistant metal hose is added inside the gas pipe brick, and when the airflow channels of the upper and lower gas pipe bricks are built, the high-temperature resistant metal hose is inserted into the hole of the gas pipe brick in advance and connected. The joint surfaces of the upper and lower gas pipe bricks in different temperature ranges are provided with expansion sliding areas in advance. During expansion, the airflow channels of the upper and lower gas pipe bricks are kept unobstructed by the high-temperature resistant metal hose. After the thermal expansion is completed, the gas pipeline airflow channels corresponding to each temperature range are vertically aligned and connected, which fundamentally solves the gas leakage problem of the gas bottom-spraying coke oven. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of dividing different temperature intervals of the high temperature zone and the low temperature zone of the coke oven described in the present invention.

[0023] Figure 2 It is a schematic diagram of the connection between the upper gas pipe brick and the lower gas pipe brick of the present invention.

[0024] In the figure: 1. Regenerator 2. Inclined area 3. Combustion chamber 4. Gas pipe bricks 5. Gas pipe brick airflow channel 6. Lower gas pipe bricks 7. Upper gas pipe bricks 8. High temperature resistant metal hose 9. Sliding layer Ⅰ. High temperature area Ⅱ. Medium temperature area Ⅲ. Low temperature area Ⅳ. Low temperature area 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 2As shown, the present invention discloses a leakage-proof coke oven regenerator structure, wherein the top of the regenerator 1 of the coke oven is connected to the bottom of the combustion chamber 3 through the ramp area 2, and the combustion chamber 3 is composed of a plurality of vertical fire channels, each of which is provided with a downward gas injection inlet, which is connected to the basement gas horizontal pipe arranged below the regenerator 1 through a gas pipe brick airflow channel 5, and the gas pipe brick airflow channel 5 is formed by laying multiple layers of gas pipe bricks 4; from the lower part of the combustion chamber 3 to the bottom of the regenerator 1, it is divided into a plurality of different temperature intervals, including high temperature zone I, medium temperature zone II, relatively low temperature zone III and low temperature zone IV from top to bottom; the gas pipeline airflow channels 5 corresponding to each temperature interval are staggered, and a high temperature resistant metal hose 8 is arranged from top to bottom in the gas pipe brick airflow channel 5 corresponding to the same vertical fire channel; a sliding layer 9 is arranged between the masonry of different temperature intervals.

[0027] The upper part of the heat storage chamber 1 is divided into a low temperature zone IV, and the upper part of the heat storage chamber 1 is divided into a relatively low temperature zone III; the ramp zone 2 is divided into a medium temperature zone II; and the lower part of the combustion chamber 3 is divided into a high temperature zone I.

[0028] The top and bottom surfaces of the gas pipe brick 4 are both flat.

[0029] The main wall of the heat storage chamber 1 is entirely built with gas pipe bricks 5 .

[0030] The sliding layer 9 is composed of asphalt felt and a concrete layer arranged between the asphalt felt and the gas pipe brick 4.

[0031] The high temperature resistant metal hose 8 is provided with an expansion joint at the connection of each section of the gas pipe brick air flow channel 5 .

[0032] A construction method for a leak-proof coke oven regenerator structure comprises the following steps:

[0033] 1) According to the temperature of the coke oven during normal production and the thermal expansion curve of the gas pipe brick refractory material constituting the main wall of the regenerator, the coke oven is divided from the lower part of the combustion chamber 3 to the bottom of the regenerator 1 into high temperature zone I, medium temperature zone II, relatively low temperature zone III and low temperature zone IV;

[0034] 2) According to the temperature of the area where the gas pipe brick 4 is located and the refractory expansion rate of the gas pipe brick 4, calculate the thermal expansion displacement of the gas pipe brick 4 during the process from the cold state to the hot state of the coke oven;

[0035] 3) When the coke oven is built, the gas pipe bricks 4 in each temperature range are vertically aligned to form a through gas pipe brick airflow channel 5; the gas pipe brick airflow channels 5 of two adjacent temperature ranges are staggered;

[0036] 4) When laying two layers of gas pipe bricks 4 adjacent to each other in two temperature ranges, first connect the high temperature resistant metal hose in the air flow channel of the upper gas pipe brick with the high temperature resistant metal hose in the air flow channel of the lower gas pipe brick; and set a layer of asphalt felt at the joint surface between the upper gas pipe brick 7 and the lower gas pipe brick 6, and apply plaster on one side of the gas pipe brick 4 in contact with the asphalt felt to form a sliding layer 9;

[0037] 5) During the coke oven baking process, the main wall as a whole moves from the center of the oven to the two sides of the machine coke under the action of thermal expansion, and the gas pipeline airflow channels 5 of the two adjacent temperature intervals slide relatively, and the high-temperature resistant metal hose 8 is used to ensure that the gas pipe brick airflow channels 5 of each temperature interval remain unobstructed; after the thermal expansion is completed, the gas pipeline airflow channels 5 corresponding to each temperature interval are vertically aligned and connected.

[0038] The present invention discloses a leakage-proof coke oven regenerator structure, wherein the coke oven comprises a regenerator 1, a ramp area 2 and a combustion chamber 3 from bottom to top. The present invention divides the regenerator 1 into a low-temperature area IV and a relatively low-temperature area III according to temperature distribution, divides the area where the ramp area 2 is located into a medium-temperature area II, and divides the lower area of ​​the combustion chamber into a high-temperature area I.

[0039] A plurality of gas pipe bricks 4 are arranged in the main wall of the heat storage chamber 1. The multiple layers of gas pipe bricks 4 form a gas pipe brick airflow channel 5 from the coke oven bottom plate upwards. The upper outlet of the gas pipe brick airflow channel 5 is located at the bottom of the vertical fire channel of the combustion chamber 3. A gas pipeline airflow channel 5 is arranged corresponding to each vertical fire channel to provide gas fuel for combustion inside the vertical fire channel.

[0040] The upper and lower surfaces of each layer of gas pipe bricks 4, i.e., the connecting surfaces of the upper gas pipe bricks 7 and the lower gas pipe bricks 6, are all smooth surfaces, and no brick grooves or brick tongues are provided. In addition, the present invention increases the outer dimensions of the gas pipe bricks 4 without enlarging the radius of the gas pipe brick airflow channel 5, so that the main wall of the heat storage chamber 1 is built by the gas pipe bricks 4, that is, the silicon refractory bricks between the gas pipe bricks in the conventional main wall are eliminated, thereby reducing the types of refractory materials, and at the same time reducing the expansion shear force caused by different expansion rates, and preventing the mortar joints between the gas pipe bricks 4 from rupturing due to the expansion shear force, causing gas leakage.

[0041] In the coke oven design stage, the present invention divides the coke oven into regions according to the temperature, which are divided into high temperature zone I, medium temperature zone II, low temperature zone III and low temperature zone IV. The gas pipe brick airflow channel 5 in each temperature range is connected up and down to form a vertical airflow channel. In order to reduce the influence of different expansion amounts caused by temperature difference between two adjacent layers of gas pipe bricks 4 in different temperature ranges, the expansion movement difference between the upper and lower layers of gas pipe bricks 4 is calculated according to the expansion rate under different temperature conditions, so that the gas pipe brick airflow channels 5 in the upper and lower two temperature ranges are staggered, and a sliding layer 9 is added at the joint.

[0042] The present invention adds a high temperature resistant metal hose 8 in the gas pipe brick airflow channel 5. During the construction of the gas pipe bricks 4, the high temperature resistant metal hose 8 corresponding to the upper gas pipe brick airflow channel is connected in advance with the high temperature resistant metal hose 8 in the lower gas pipe brick airflow channel. During the coke oven baking process, the gas pipe bricks 4 corresponding to the same gas pipe brick airflow channel 6 in different temperature ranges will slide relatively according to the preset expansion displacement, and the high temperature resistant metal hose 8 therein will move accordingly to ensure that the gas pipe brick airflow channel 5 is unobstructed. The above design can effectively prevent the coke oven gas leakage caused by the damage of the gas pipe bricks 4 due to the expansion shear force, and prevent the coke oven's lower gas injection system from failing.

[0043] A sliding layer 9 is provided on the joint surface of the upper and lower layers of gas pipe bricks located in different temperature ranges. The sliding layer 9 mainly comprises asphalt felt, and the side in contact with the gas pipe brick 4 is coated with putty. The sliding layer 9 formed in this way enables the upper and lower layers of gas pipe bricks 4 to slide relative to each other smoothly.

[0044] The expansion sliding interval is designed in advance according to the expansion curve of the gas pipe brick material in the main wall under different temperature conditions. The expansion movement is precalculated in advance during the coke oven body construction process. During the oven baking process, the main wall as a whole expands from the center of the furnace to both sides of the machine coke. The refractory material in high temperature zone I has the largest expansion movement, followed by the expansion movement of the refractory material in medium temperature zone II and low temperature zone III, and the expansion movement of the refractory material in low temperature zone IV is the smallest. After the expansion movement, the staggered joints between the gas pipe brick airflow channels 5 in the four different temperature intervals disappear, and the gas pipe brick airflow channels 5 in each temperature interval are interconnected to form a vertical gas channel that runs from the coke oven bottom plate to the vertical fire channel of the combustion chamber.

[0045] 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 leak-proof coke oven regenerator structure, wherein the top of the regenerator of the coke oven is connected to the bottom of the combustion chamber through a ramp area, and the combustion chamber is composed of a plurality of vertical fire channels, each of which is provided with a downward-spraying coal gas inlet, which is connected to a basement gas horizontal pipe arranged below the regenerator through a gas pipe brick airflow channel, and the gas pipe brick airflow channel is formed by laying multiple layers of gas pipe bricks; characterized in that: The area from the bottom of the combustion chamber to the bottom of the heat storage chamber is divided into a number of different temperature zones, including a high temperature zone, a medium temperature zone, a relatively low temperature zone and a low temperature zone from top to bottom; the gas pipeline airflow channels corresponding to each temperature zone are staggered, and a high-temperature resistant metal hose is arranged from top to bottom in the gas pipe brick airflow channel corresponding to the same vertical fire channel; a sliding layer is arranged between the masonry in different temperature zones.

2. The anti-leakage coke oven regenerator structure according to claim 1, characterized in that: The upper part of the heat storage chamber is divided into a low temperature zone, the upper part of the heat storage chamber is divided into a relatively low temperature zone; the ramp zone is divided into a medium temperature zone; and the lower part of the combustion chamber is divided into a high temperature zone.

3. The anti-leakage coke oven regenerator structure according to claim 1, characterized in that: The top surface and the bottom surface of the gas pipe brick are both flat.

4. The anti-leakage coke oven regenerator structure according to claim 1, characterized in that: The main walls of the heat storage chamber are all built with gas pipe bricks.

5. The anti-leakage coke oven regenerator structure according to claim 1, characterized in that: The sliding layer consists of asphalt felt and a concrete layer arranged between the asphalt felt and the gas pipe brick.

6. The anti-leakage coke oven regenerator structure according to claim 1, characterized in that: The high temperature resistant metal hose is provided with expansion joints at the joints of the air flow passages of each section of the gas pipe brick.

7. A construction method for the leakage-proof coke oven regenerator structure according to any one of claims 1 to 6, characterized in that: The steps include: 1) According to the temperature of the coke oven during normal production and the thermal expansion curve of the gas pipe brick refractory material constituting the main wall of the regenerator, the coke oven is divided from the lower part of the combustion chamber to the bottom of the regenerator into a high temperature zone, a medium temperature zone, a low temperature zone and a low temperature zone; 2) According to the temperature of the area where the gas pipe bricks are located and the refractory expansion rate of the gas pipe bricks, calculate the thermal expansion displacement of the gas pipe bricks during the process from the cold state to the hot state of the coke oven; 3) When the coke oven is built, the gas pipe bricks in each temperature range are vertically aligned to form a through gas pipe brick airflow channel; the gas pipe brick airflow channels of two adjacent temperature ranges are staggered; 4) When laying two layers of gas pipe bricks in adjacent temperature ranges, first connect the high temperature resistant metal hose in the air flow channel of the upper gas pipe brick with the high temperature resistant metal hose in the air flow channel of the lower gas pipe brick; and set a layer of asphalt felt at the joint surface of the upper and lower gas pipe bricks, and apply plaster on one side of the gas pipe brick in contact with the asphalt felt to form a sliding layer; 5) During the coke oven baking process, the main wall as a whole moves from the center of the oven to the two sides of the machine coke under the action of thermal expansion, and the gas pipeline airflow channels of the two adjacent temperature intervals slide relatively, and the high-temperature resistant metal hose is used to ensure that the gas pipe brick airflow channels in each temperature interval remain unobstructed; after the thermal expansion is completed, the gas pipeline airflow channels corresponding to each temperature interval are vertically aligned and connected.

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