A gas mixing device

Abstract

The present invention relates to a gas mixing device, comprising a device body, a blast furnace gas inlet pipe, a coke oven gas inlet pipe and a mixed gas outlet pipe; the device body is a closed structure, consisting of a straight section cylinder and a conical section cylinder; a coke oven gas inlet pipe is arranged at the center of the top of the straight section cylinder, a blast furnace gas inlet pipe is arranged tangentially on one side of the upper part, and a mixed gas inlet pipe is arranged at the lower part; the lower section of the coke oven gas inlet pipe extends into the straight section cylinder, the bottom of the extended section is a closed structure, and a plurality of gas diffusion holes are provided in the extended section; a water outlet is arranged at the bottom of the conical section cylinder. In the gas mixing device of the present invention, blast furnace gas is fed along the tangential swirl of the device body, and coke oven gas enters the device body through a plurality of gas diffusion holes, so that the two gases are evenly and fully mixed, and at the same time, the swirl principle is used to remove moisture in the gas, so as to ensure that the mixed gas after mixing is fully burned.

Description

Technical Field

[0001] The invention relates to a gas mixing device, in particular to a coal gas mixing device. Background Art

[0002] Blast furnace gas is a by-product gas produced during the blast furnace smelting process. Its characteristics are low calorific value and large gas production. Unusable blast furnace gas must be ignited and burned before it can be released into the atmosphere, resulting in energy waste.

[0003] In order to utilize blast furnace gas with low calorific value, a certain amount of coke oven gas is usually mixed, that is, it is used in the form of mixed gas; to ensure sufficient combustion of the mixed gas, the blast furnace gas and coke oven gas are required to be mixed evenly; at the same time, it is required to remove moisture from the mixed gas before it enters the burner. Summary of the invention

[0004] The present invention provides a gas mixing device, in which blast furnace gas is fed along the device body in a tangential swirl flow, and coke oven gas enters the device body through a plurality of gas diffusion holes, so that the two gases are evenly and fully mixed. At the same time, the swirl principle is utilized to remove moisture from the gas, thereby ensuring that the mixed gas after blending is fully burned.

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

[0006] A gas mixing device comprises a device body, a blast furnace gas inlet pipe, a coke oven gas inlet pipe and a mixed gas outlet pipe; the device body is a closed structure, consisting of an upper straight section cylinder and a lower conical section cylinder; a coke oven gas inlet pipe is arranged at the center of the top of the straight section cylinder, a blast furnace gas inlet pipe is arranged along the tangent direction on one side of the upper part, and a mixed gas inlet pipe is arranged at the lower part; the lower section of the coke oven gas inlet pipe extends into the straight section cylinder, the bottom of the extended section is a closed structure, and a plurality of gas diffusion holes are opened in the extended section; the mixed gas inlet end of the mixed gas outlet pipe is arranged in the middle of the straight section cylinder, and the mixed gas outlet end is arranged outside the straight section cylinder; a water outlet is arranged at the bottom of the conical section cylinder.

[0007] The coke oven gas inlet pipe is composed of a vertical pipe section, a head and a flange. The vertical pipe section is coaxially arranged with the straight section cylinder. The lower section of the vertical pipe section extends into the straight section cylinder, and the bottom is closed by the head. A plurality of gas diffusion holes are provided on the extending section and the head of the vertical pipe section. A flange is provided on the top of the vertical pipe section for connecting to an external coke oven gas pipeline.

[0008] The top of the straight section cylinder is closed by a top plate, and a coke oven gas inlet pipe is arranged in the middle of the top plate.

[0009] The blast furnace gas inlet pipe is arranged horizontally, one end of the blast furnace gas inlet pipe is connected to the side wall of the straight section cylinder, and the other end is provided with a flange for connecting to an external blast furnace gas pipeline.

[0010] The mixed gas outlet pipe is composed of a horizontal pipe section, a 90° elbow, an extension pipe section and flange three; one end of the horizontal pipe section extends into the straight section cylinder and is connected to the top of the extension pipe section through a 90° elbow, and the extension pipe section is coaxially arranged with the straight section cylinder; flange three is arranged at the other end of the horizontal pipe section for connecting to an external mixed gas pipeline.

[0011] The bottom of the cone section cylinder is provided with a closing section, which is a straight cylinder structure and is coaxially arranged with the cone section cylinder; the bottom of the closing section is closed by a bottom plate; the middle of the bottom plate is provided with a water outlet, which is connected to an external water seal groove through a pipeline.

[0012] A coke oven gas flow regulating valve is arranged on the coke oven gas pipeline.

[0013] A blast furnace gas flow regulating valve is arranged on the blast furnace gas pipeline.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1) Blast furnace gas is fed along the tangential swirl flow of the device body and mixed with coke oven gas that enters the device body through multiple gas diffusion holes to ensure uniform and sufficient mixing;

[0016] 2) The blast furnace gas generates a swirl along the tangential feed, which can effectively remove moisture from the gas;

[0017] 3) The separated water flows to the water seal groove through the water outlet at the bottom of the device body, ensuring safe and reliable operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view of a gas mixing device according to the present invention.

[0019] Figure 2 yes Figure 1 Top view of the .

[0020] In the figure: 1. Straight section cylinder 2. Conical section cylinder 3. Coke oven gas inlet pipe 31. End cap 32. Gas diffusion hole 4. Blast furnace gas inlet pipe 5. Mixed gas outlet pipe 6. Top plate 7. Closing section 8. Bottom plate 9. Water outlet DETAILED DESCRIPTION

[0021] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings:

[0022] like Figure 1 , Figure 2As shown, a gas mixing device described in the present invention comprises a device body, a blast furnace gas inlet pipe 4, a coke oven gas inlet pipe 3 and a mixed gas outlet pipe 5; the device body is a closed structure, consisting of an upper straight section cylinder 1 and a lower conical section cylinder 2; a coke oven gas inlet pipe 3 is arranged at the center position of the top of the straight section cylinder 1, a blast furnace gas inlet pipe 4 is arranged along the tangent direction on one side of the upper part, and a mixed gas inlet pipe 5 is arranged at the lower part; the lower section of the coke oven gas inlet pipe 3 extends into the straight section cylinder 1, the bottom of the extended section is a closed structure, and a plurality of gas diffusion holes 32 are opened in the extended section; the mixed gas inlet end of the mixed gas outlet pipe 5 is arranged in the middle of the straight section cylinder 1, and the mixed gas outlet end is arranged outside the straight section cylinder 1; a water outlet 9 is arranged at the bottom of the conical section cylinder 2.

[0023] The coke oven gas inlet pipe 3 is composed of a vertical pipe section, a head 31 and a flange 1. The vertical pipe section is coaxially arranged with the straight section cylinder 1; the lower section of the vertical pipe section extends into the straight section cylinder 1, and the bottom is closed by the head 31; a plurality of gas diffusion holes 32 are provided on the extending section of the vertical pipe section and the head 31; a flange 1 is provided on the top of the vertical pipe section for connecting to an external coke oven gas pipeline.

[0024] The top of the straight section cylinder 1 is closed by a top plate 6 , and the coke oven gas inlet pipe 3 is arranged in the middle of the top plate 6 .

[0025] The blast furnace gas inlet pipe 4 is arranged horizontally, one end of the blast furnace gas inlet pipe 4 is connected to the side wall of the straight section cylinder 1, and the other end is provided with a flange 2 for connecting to an external blast furnace gas pipeline.

[0026] The mixed gas outlet pipe 5 is composed of a horizontal pipe section, a 90° elbow, an extension pipe section and flange 3; one end of the horizontal pipe section extends into the straight section cylinder 1 and is connected to the top of the extension pipe section through a 90° elbow, and the extension pipe section is coaxially arranged with the straight section cylinder 1; flange 3 is arranged at the other end of the horizontal pipe section for connecting to an external mixed gas pipeline.

[0027] The bottom of the conical section cylinder 2 is provided with a closing section 7, which is a straight cylinder structure and is coaxially arranged with the conical section cylinder 2; the bottom of the closing section 7 is closed by a bottom plate 8; the middle of the bottom plate 8 is provided with a water outlet 9, which is connected to an external water seal groove through a pipeline.

[0028] A coke oven gas flow regulating valve is arranged on the coke oven gas pipeline.

[0029] A blast furnace gas flow regulating valve is arranged on the blast furnace gas pipeline.

[0030] In the gas mixing device described in the present invention, blast furnace gas enters along the tangential direction of the straight section cylinder 1, and coke oven gas enters from the top of the straight section cylinder 1 through the extension section of the coke oven gas inlet pipe 3 and the multiple gas diffusion holes 32 opened on the end cap 31; after the blast furnace gas enters the straight section cylinder 1, a swirl is generated, and the blast furnace gas is evenly mixed with the coke oven gas entering from the multiple gas diffusion holes 32, and the mixing is more complete. The gas inlet of the mixed gas outlet pipe 5 is located at the lower center of the straight section cylinder 1, that is, the position where the swirl gas turns back upward, and the mixed mixed gas is sent out from the mixed gas outlet pipe 5.

[0031] The gas mixing device is a closed structure as a whole. Under the action of cyclone, the water separated from the gas flows to the bottom of the conical cylinder 2 and enters the water seal groove through the water outlet 9; external gas will not enter the gas mixing device, thereby ensuring the safe operation of the system.

[0032] The mixing ratio of blast furnace gas and coke oven gas in the mixed gas is controlled by the coke oven gas flow regulating valve and the blast furnace gas flow regulating valve.

[0033] The working principle of the gas mixing device described in the present invention is as follows:

[0034] The coke oven gas gradually diffuses into the device body through multiple gas diffusion holes 32, while the blast furnace gas enters the device body along the tangential swirl. After entering the device body, the blast furnace gas airflow changes from linear motion to circular motion (generating swirl), driving the coke oven gas to move downward in a spiral along the circumference of the straight section cylinder 1. Centrifugal force is generated during the rotation process, and water droplets in the gas are thrown to the cylinder wall of the straight section cylinder 1, and flow downward to the bottom of the conical section cylinder 2 by gravity, and finally enter the water seal groove from the water outlet 9. When the mixed gas airflow rotating downward reaches the conical section cylinder 2, it moves toward the center along with the conical contraction structure, and when it reaches the lower part of the conical section cylinder 2, the rotation direction of the gas changes from downward to upward and continues to do spiral motion, and enters the mixed gas outlet pipe 5 from the bottom opening of the extension section. At this time, the two gases are evenly mixed, and the water contained in the gas is removed, which can ensure that the mixed gas is fully burned in the later combustion process.

[0035] 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 gas mixing device, characterized in that: The invention comprises a device body, a blast furnace gas inlet pipe, a coke oven gas inlet pipe and a mixed gas outlet pipe; the device body is a closed structure, consisting of an upper straight section cylinder and a lower conical section cylinder; the top of the straight section cylinder is closed by a top plate, a coke oven gas inlet pipe is arranged at the center of the top of the straight section cylinder, i.e., the middle of the top plate, a blast furnace gas inlet pipe is arranged along a tangential direction on one side of the upper part of the straight section cylinder, and a mixed gas inlet pipe is arranged at the lower part; the lower section of the coke oven gas inlet pipe extends into the straight section cylinder, the bottom of the extended section is a closed structure, and the extended section A plurality of gas diffusion holes are provided; the mixed gas inlet end of the mixed gas outlet pipe is arranged in the middle of the straight section cylinder, and the mixed gas outlet end is arranged outside the straight section cylinder; the mixed gas outlet pipe is composed of a horizontal pipe section, a 90° elbow, an extension pipe section and flange three; one end of the horizontal pipe section extends into the straight section cylinder, and is connected to the top end of the extension pipe section through a 90° elbow, and the extension pipe section is coaxially arranged with the straight section cylinder; flange three is provided at the other end of the horizontal pipe section for connecting to an external mixed gas pipeline; a water outlet is provided at the bottom of the conical section cylinder.

2. A gas mixing device according to claim 1, characterized in that: The coke oven gas inlet pipe is composed of a vertical pipe section, a head and a flange. The vertical pipe section is coaxially arranged with the straight section cylinder. The lower section of the vertical pipe section extends into the straight section cylinder, and the bottom is closed by the head. A plurality of gas diffusion holes are provided on the extending section and the head of the vertical pipe section. A flange is provided on the top of the vertical pipe section for connecting to an external coke oven gas pipeline.

3. A gas mixing device according to claim 1, characterized in that: The blast furnace gas inlet pipe is arranged horizontally, one end of the blast furnace gas inlet pipe is connected to the side wall of the straight section cylinder, and the other end is provided with a flange for connecting to an external blast furnace gas pipeline.

4. A gas mixing device according to claim 1, characterized in that: The bottom of the cone section cylinder is provided with a closing section, which is a straight cylinder structure and is coaxially arranged with the cone section cylinder; the bottom of the closing section is closed by a bottom plate; the middle of the bottom plate is provided with a water outlet, which is connected to an external water seal groove through a pipeline.

5. A gas mixing device according to claim 2, characterized in that: A coke oven gas flow regulating valve is arranged on the coke oven gas pipeline.

6. A gas mixing device according to claim 3, characterized in that: A blast furnace gas flow regulating valve is arranged on the blast furnace gas pipeline.

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