Air distribution port brick for top of heat recovery coke oven

Abstract

The utility model provides an air distribution port brick for a heat recovery coke oven top, which is characterized in that a body is a cylinder, a vertical air inlet channel is arranged along the central axis of the body, the air inlet channel is positioned in the center of the body, a plurality of uniformly distributed air distribution channels are arranged at the lower part of the side wall of the body, and the air inlet channel is communicated with the air distribution channels; the included angle alpha between the center line of the air distribution channels and the center line of the air inlet channel ranges from 75 degrees to 85 degrees, a brick bottom is arranged at the bottom of the body, reinforcing ribs are arranged between the adjacent air distribution channels, and the reinforcing ribs, the side walls and the brick bottom are connected into a whole. The air distribution port brick has the advantages of being reasonable in structural design, high in overall strength, not prone to cracking, good in air distribution effect, capable of evenly distributing air to a coke oven carbonization chamber, capable of generating a good inert gas protection layer on the top of the carbonization chamber and long in service life.

Description

Technical Field

[0001] The utility model relates to the technical field of heat recovery coke ovens, in particular to an air distribution brick for a heat recovery coke oven top. Background Art

[0002] The clean heat recovery coke oven includes key parts such as the carbonization chamber, combustion chamber, riser, and gas collecting pipe. It uses negative pressure to exchange heat through the waste heat boiler to generate hot steam to achieve the cogeneration of coke and electricity through the steam turbine generator. It is clean, pollution-free, and has low energy consumption. The working principle of the heat recovery coke oven is to put the coking coal into the carbonization chamber after tamping, and use the heat stored in the main wall, furnace bottom and furnace top of the carbonization chamber and the heat transmitted from the adjacent carbonization chamber to heat and decompose the coking coal to produce raw coal gas. In the process of escaping from bottom to top, the raw coal gas covers the surface of the coal seam to form the first layer of inert gas protection layer, and then diffuses to the furnace top space, and incomplete combustion occurs with the air introduced from the outside. The generated waste gas forms the second layer of inert gas protection layer between coal coke and air. Due to the continuous generation of raw coal gas generated by dry distillation, it covers the coal (coke) layer and diffuses to the furnace top continuously. The coal (coke) layer is always covered with a complete inert gas protection layer throughout the coking cycle, so that the coking coal is heated under air-isolated conditions to obtain coke. The incompletely burned gas in the carbonization chamber passes through the main wall of the carbonization chamber and descends into the combustion chamber. Under the protection of refractory bricks, it is fully burned again with the moderately excessive air entering. The high-temperature exhaust gas after combustion is sent to power generation and discharged into the atmosphere after sulfur dioxide is removed.

[0003] The top of the carbonization chamber is located at the top of the heat recovery coke oven. There is a fire-watching hole on the top of the furnace. Since the heat recovery coke oven is operated under negative pressure, the air outside the furnace enters the upper part of the carbonization chamber from the fire-watching hole on the top of the furnace and directly rushes to the coal seam, and the oxygen concentration in the upper part of the carbonization chamber increases locally. The inert gas in the carbonization chamber and the coal seam burn rapidly, destroying the inert gas protective layer on the top of the charcoal fire chamber, which directly affects the coking rate and coking efficiency.

[0004] At present, the fire viewing holes on the top of the heat recovery coke oven use air distribution type fire viewing hole bricks. By changing the direction of the fire viewing holes, the state of the inert gas protection layer on the top of the carbonization chamber has been improved to a certain extent. However, there are still technical problems such as unreasonable structure, low overall strength, easy cracking, poor air distribution effect and short service life. Utility Model Content

[0005] Based on the above technical problems, the utility model proposes an air distribution brick for the top of a heat recovery coke oven, which has a reasonable structural design, high overall strength, is not easy to crack, has a good air distribution effect, can evenly distribute air to the carbonization chamber of the coke oven, and produces a good inert gas protection layer on the top of the carbonization chamber, and has a long service life.

[0006] A heat recovery coke oven roof air distribution brick comprises a body, which is a cylinder. A vertical air inlet channel is arranged along the central axis of the body, the air inlet channel is located at the center of the body, a plurality of evenly distributed air distribution channels are arranged at the lower part of the side wall of the body, the air inlet channel and the air distribution channel are connected, the angle α between the center line of the air distribution channel and the center line of the air inlet channel is 75°-85°, a brick bottom is arranged at the bottom of the body, reinforcing ribs are arranged between adjacent air distribution channels, and the reinforcing ribs are connected to the side wall and the brick bottom as a whole.

[0007] Preferably, at least two air distribution channels are provided, the reinforcing ribs are provided between adjacent air distribution channels, and the air distribution channels are evenly arranged on the side wall of the main body in a circumferential shape.

[0008] Preferably, the cross-section of the air distribution channel is circular or elliptical.

[0009] Preferably, the opening of the air distribution channel is small inside and large outside.

[0010] Preferably, the inner wall of the air distribution channel is provided with a spiral structure.

[0011] Preferably, an annular boss is provided on the outer edge of the upper end of the main body.

[0012] Preferably, a transverse brick lifting groove is provided in the annular boss, and the brick lifting groove passes through the annular boss.

[0013] Preferably, the main body is made of corundum mullite, high-strength mullite, silicon carbide or silicon nitride.

[0014] The present application has at least the following technical effects or advantages: the heat recovery coke oven air outlet brick designed in the present solution is connected by an air inlet channel with at least two air distribution channels, the air distribution channels are evenly distributed, and the angle α between the center line of the air distribution channel and the center line of the air inlet channel and the new line of the air inlet channel is 75 。_ 85 。 , it prevents the air outside the furnace from entering the upper part of the carbonization chamber from the fire-viewing hole on the furnace top and directly rushing to the coal seam, so that the incoming air is evenly mixed with the inert gas in the upper part of the carbonization chamber, and the inert gas on the top of the charcoal fire chamber can still form a stable protective layer, and improves the coking rate and coking efficiency. Reinforcing ribs are arranged in the air inlet channel, and the reinforcing ribs are connected to the brick bottom and the side wall of the main body of the air distribution brick to form a whole. The connecting part between the reinforcing ribs and the side wall of the main body is located between adjacent air distribution channels. The structure is reasonable, the overall strength is improved, it is not easy to crack, and the service life is effectively extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Shows a front view of the utility model;

[0016] Figure 2 Shows Figure 1AA section view;

[0017] Figure 3 Shows a top view of the utility model;

[0018] Figure 4 A schematic diagram of the structure of the second embodiment is shown;

[0019] In the attached drawings, 1-main body, 2-side wall, 3-bottom, 4-air inlet channel, 5-air distribution channel, 6-reinforcement ribs, 7-annular boss, 8-brick lifting groove. DETAILED DESCRIPTION

[0020] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0021] Reference Figure 1~Figure 4 The main body 1 is cylindrical as a whole, and the main body 1 is composed of a side wall 2 and a brick bottom 3. The air inlet channel 4 is located in the middle of the main body 1 and is vertically opened with the central axis of the main body 1 as the center. The air distribution channel 5 is an extension of the air inlet channel 4. The air distribution channel 5 and the air inlet channel 4 are mutually connected. The air distribution channel 5 penetrates the side wall 2 of the main body 1. The angle α between the center line of the air distribution channel 5 and the center line of the air inlet channel 4 is 75°-85°, which prevents the air outside the furnace from entering the upper part of the carbonization chamber from the fire viewing hole on the top of the furnace and directly rushing to the coal seam, so that the air entering is evenly mixed with the inert gas in the upper part of the carbonization chamber, and the inert gas in the top of the charcoal fire chamber can still form A stable protective layer is formed, and the coking rate and coking efficiency are improved; a reinforcing rib 6 is arranged in the air inlet channel 4, and the reinforcing rib 6 is connected with the bottom brick 3 and the side wall 2 of the main body to form a whole, and the connection between the reinforcing rib 6 and the side wall 2 is located between adjacent air distribution channels, that is, a reinforcing rib 6 is arranged between every two air distribution channels 5, and a reinforcing rib 6 is arranged in the air inlet channel 4, and the reinforcing rib 4 is connected with the bottom brick 3 and the side wall 2 to form a whole, and the connection between the reinforcing rib 6 and the side wall 2 is located between adjacent air distribution channels, and the reinforcing rib 6 intersects with the central axis of the main body, the structure is reasonable, the overall strength is improved, it is not easy to crack, and the service life is effectively extended.

[0022] Embodiment 1:

[0023] In this example, an air inlet channel 4 and two air distribution channels 5 are provided in the main body 1. The air distribution channels 5 are evenly and symmetrically arranged on the side wall 2 in a circular shape. The cross-sections of the air inlet channel 4 and the air distribution channels 5 are both circular. An annular boss 7 is provided on the outer edge of the upper part of the main body 1. The annular boss 7 is provided in the annular boss 7. A brick lifting groove 8 passing through the annular boss 7 is provided. The brick lifting groove 8 is a circular hole groove. The main body is made of corundum mullite, high-strength mullite, silicon carbide, and silicon nitride.

[0024] Embodiment 2:

[0025] In this embodiment, if Figure 4 As shown, an air inlet channel 4 and three air distribution channels are arranged in the main body 1 . The air distribution channels 5 are evenly distributed on the side wall 2 in a circular shape. A reinforcing rib 6 is arranged between each air distribution channel 5 . The reinforcing ribs 6 are connected at the center axis of the air inlet channel 4 .

[0026] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A tuyere brick for a heat recovery coke oven top, characterized in that: include: The main body is a cylinder, and a vertical air inlet channel is provided along the central axis of the main body, and the air inlet channel is located at the center of the main body. A plurality of evenly distributed air distribution channels are provided at the lower part of the side wall of the main body, and the air inlet channel and the air distribution channel are connected, and the angle α between the center line of the air distribution channel and the center line of the air inlet channel is 75°-85°. A brick bottom is provided at the bottom of the main body, and reinforcing ribs are provided between adjacent air distribution channels, and the reinforcing ribs are connected to the side walls and the brick bottom as a whole.

2. The heat recovery coke oven roof tuyere brick according to claim 1, characterized in that: At least two air distribution channels are provided.

3. The heat recovery coke oven roof tuyere brick according to claim 1, characterized in that: The cross section of the air distribution channel is circular or elliptical.

4. The heat recovery coke oven roof tuyere brick according to claim 1, characterized in that: The opening of the air distribution channel is small inside and large outside.

5. The tuyere brick for the heat recovery coke oven top according to claim 1, characterized in that: The inner wall of the air distribution channel is provided with a spiral structure.

6. The heat recovery coke oven roof tuyere brick according to claim 1, characterized in that: An annular boss is arranged on the outer edge of the upper end of the main body.

7. The tuyere brick for the heat recovery coke oven top according to claim 6, characterized in that: A horizontal brick lifting groove is arranged in the annular boss.

8. The tuyere brick for the heat recovery coke oven top according to claim 7, characterized in that: The brick lifting groove passes through the annular boss.

Images