Coke material adsorption device for flue gas treatment of steelmaking vacuum furnace

Abstract

The utility model provides a coke adsorption device for flue gas treatment of a steelmaking vacuum furnace, and relates to the technical field of flue gas treatment. The tower comprises at least three supporting legs and a tower body, and the supporting legs are arranged below the tower body; the middle part of the tower body is cylindrical, the top and the bottom of the tower body are conical, a downward liquid discharge hole is formed in the bottom of the tower body, an upward exhaust hole is formed in the top of the tower body, a first pore plate, a second pore plate and a third pore plate are sequentially arranged in the tower body from top to bottom, an air inlet hole is outwards formed in the side surface of the tower body, and an air outlet hole is formed in the top of the tower body. The gas inlet hole is located between the third pore plate and the liquid discharge hole, active coke is stacked on the third pore plate, a spraying pipe is arranged above the active coke to spray water to the active coke, the spraying pipe is located between the second pore plate and the third pore plate, the spraying pipe is connected with a water path outside the tower body, and activated carbon is stacked on the second pore plate. According to the coke adsorption device for flue gas treatment of the steelmaking vacuum furnace, the flue gas is subjected to multiple purification, and the content of pollutants in the flue gas is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas treatment, in particular to a coke material adsorption device for flue gas treatment of a steelmaking vacuum furnace. Background Art

[0002] Activated coke is an intermediate adsorbent coal product between activated carbon and coke. Activated coke is an adsorbent produced from coal, and is produced by processes such as pulverization, proportioning, forming, coking, and activation of raw materials. For different adsorption objects, the types of raw materials, raw material ratios, and process parameters are different.

[0003] Activated coke is a granular substance with dual properties of adsorbent and catalyst developed mainly from lignite, and has a very rich microporous structure, which can adsorb macromolecules and long-chain organic substances. Most of the substances used as catalysts have a higher degree of microporous structure than ordinary substances, and activated coke is the catalyst with the most developed microporous structure among them. The micropores in activated coke play a dominant role in the adsorption capacity of activated coke.

[0004] A steelmaking vacuum furnace is a steel liquid vacuum treatment device that places the primary molten steel of an electric furnace and a converter in a closed tank to evacuate the air, and at the same time blows argon and stirs at the bottom of the ladle. The vacuum furnace has a good degassing and deoxidation effect, and can effectively reduce the hydrogen and nitrogen content in steel. The existing flue gas treatment devices used in steelmaking vacuum furnaces have the problem of incomplete flue gas treatment. Content of the Utility Model

[0005] Therefore, the utility model provides a coke material adsorption device for flue gas treatment of a steelmaking vacuum furnace to improve the problems existing in the above prior art.

[0006] The technical solution of the utility model is as follows:

[0007] A coke material adsorption device for flue gas treatment of a steelmaking vacuum furnace includes legs and a tower body. The legs are arranged below the tower body, and the number of the legs is at least three; the middle part of the tower body is cylindrical, the top and bottom of the tower body are conical, a drain hole is provided at the bottom of the tower body and extends downward, an exhaust hole is provided at the top of the tower body and extends upward, a first orifice plate, a second orifice plate and a third orifice plate are sequentially arranged in the tower body from top to bottom, an air inlet hole is opened outward on the side surface of the tower body, and the air inlet hole is located between the third orifice plate and the drain hole. Activated coke is stacked on the third orifice plate, a spray pipe is arranged above the activated coke to spray water on the activated coke, the spray pipe is located between the second orifice plate and the third orifice plate, the spray pipe is connected to the external water circuit of the tower body, and activated carbon is stacked on the second orifice plate.

[0008] As an optimization, a sampling window is provided on the side of the tower body and above the air inlet hole. The sampling window is located between the second orifice plate and the third orifice plate and above the spray nozzle of the spray pipe. The sampling window is connected to the air extraction device through a pipeline. After the air extraction device extracts the sample, the pollutant level contained in the sample can be monitored online by a sensor, and different adjustments can be made according to the results.

[0009] As an optimization, a heating coil is arranged above the activated carbon, and water vapor or hot oil flows in the heating coil. The heating coil heats and dries the flowing gas, slows down the corrosion of the tower body, and can also heat the activated carbon to maintain its activity.

[0010] As an optimization, a heating coil is arranged above the activated carbon. Electric heating wires are arranged in the heating coil, a temperature sensor is arranged outside the heating coil, the temperature sensor is electrically connected to a temperature controller, and the electric heating wires are electrically connected to the temperature controller. Heating in an electric heating manner can achieve a higher heating temperature, can heat and decompose extremely few pollutants not adsorbed by the activated carbon, and the heating temperature control is more accurate to meet a wider range of working requirements.

[0011] As an optimization, molecular sieves are stacked above the first orifice plate. The liquid discharge hole is connected to a water pump through a pipeline. A liquid level sensor is arranged below the air inlet hole. The liquid level sensor is electrically connected to a controller, and the controller is electrically connected to the water pump. In order to keep the liquid level always below the air inlet hole, a liquid level sensor is set, and the water pump is started to forcibly drain water when the liquid level approaches the lower edge of the air inlet hole. Molecular sieves can adsorb moisture and small molecules in the gas, further drying and purifying the gas.

[0012] The working principle and beneficial effects of the present utility model are as follows:

[0013] The coke material adsorption device for steelmaking vacuum furnace flue gas treatment provided by the present utility model has an air inlet hole connected to the exhaust port of the vacuum pump of the steelmaking vacuum furnace. The flue gas discharged from the steelmaking vacuum furnace contains acidic oxides such as nitrogen oxides. After the flue gas enters the tower body, it meets the liquid sprayed from above in the activated coke layer, and the pollutants in the flue gas are adsorbed by the wetted activated coke layer. The purified flue gas continues to rise, is further adsorbed by the activated carbon, dried by the heating coil, and then purified by the molecular sieve and discharged from the tower body. The coke material adsorption device for steelmaking vacuum furnace flue gas treatment of the present utility model purifies the flue gas multiple times, and the pollutant content in the purified flue gas is extremely low and has no impact on the atmosphere. Description of the Drawings

[0014] The following further elaborates on the present utility model in detail in conjunction with the drawings and specific embodiments.

[0015] Figure 1 is a structural schematic diagram of the present utility model;

[0016] Figure 2 It is a schematic diagram of the internal structure of the present utility model;

[0017] In the figure: 1, support leg; 2, liquid discharge hole; 3, air inlet hole; 4, sampling window; 5, exhaust hole; 6, third orifice plate; 7, spray pipe; 8, second orifice plate; 9, heating coil; 10, first orifice plate. Specific embodiments

[0018] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.

[0019] Please refer to Figure 1 and Figure 2 As shown in the figure, this embodiment provides a coke material adsorption device for treating steelmaking vacuum furnace flue gas, including support legs 1 and a tower body. The support legs 1 are arranged below the tower body. The number of support legs 1 is three, and it can also be set to more than three. The middle part of the tower body is cylindrical, and the top and bottom of the tower body are conical. A downward liquid discharge hole 2 is provided at the bottom of the tower body, and an upward exhaust hole 3 is provided at the top of the tower body. A first orifice plate 10, a second orifice plate 8, and a third orifice plate 6 are sequentially arranged in the tower body from top to bottom. These three orifice plates divide the space inside the tower body into four sections. An air inlet hole 3 is opened outward on the side of the tower body. The air inlet hole 3 is located between the third orifice plate 6 and the liquid discharge hole 2, that is, in the lowermost section of the tower body. Activated coke is stacked on the third orifice plate 6 for adsorbing and purifying the flue gas entering from the air inlet hole 3. A spray pipe 7 is arranged above the activated coke to spray water on the activated coke. The spray pipe 7 is connected to the water circuit outside the tower body. The water used can be the water flowing out from the liquid discharge hole 2, or the water obtained by reprocessing the water flowing out from the liquid discharge hole 2. Activated carbon is stacked on the second orifice plate 8 for further purifying the flue gas that has been adsorbed and purified by the activated coke. After being adsorbed and treated by the activated coke, the pollutants in the flue gas have been basically treated. Secondary adsorption can further treat the flue gas and exponentially reduce the pollutant content.

[0020] A sampling window 4 is provided on the side of the tower body and above the air inlet hole 3. The sampling window 4 is located between the second orifice plate 8 and the third orifice plate 6 and above the spray nozzle of the spray pipe 7. The sampling window 4 is connected to an air extraction device through a pipeline. The air extraction device extracts gas samples from the sampling window 4 and sends them to a sampling container or an on-line monitoring instrument through the pipeline to detect and analyze the content level of pollutants to monitor the content level of pollutants after being treated by the activated coke.

[0021] Above the activated carbon layer, a heating coil 9 is provided. The heating coil 9 is heated by a hot fluid flowing inside. The hot fluid preferably uses superheated steam or hot oil. The heating coil 9 heats and dries the gas flowing outside. The dried gas has a slight degree of corrosion to the tower body, which can slow down the corrosion of the tower body. At the same time, the heating coil 9 can also heat the activated carbon layer by radiation to maintain its activity.

[0022] In addition to using a hot fluid, the heating coil 9 can also be heated by an electric heating method. At this time, an electric heating wire is arranged inside the heating coil 9. A temperature sensor is tightly attached to the outer wall of the heating coil 9. The temperature sensor is electrically connected to a temperature controller, and the electric heating wire is electrically connected to the temperature controller to control the temperature of the electric heating.

[0023] Molecular sieves are stacked above the first orifice plate 10. The drain hole 2 is connected to a water pump through a pipeline. A liquid level sensor is arranged below the air inlet hole 3. The liquid level sensor is electrically connected to a controller, and the controller is electrically connected to the water pump. To control the liquid level above the drain hole 2 so that it is always below the air inlet hole 3, the water pump is started to forcibly drain water when the liquid level approaches the lower edge of the air inlet hole 3 to prevent the liquid from overflowing from the air inlet hole 3. The molecular sieves located at the uppermost section of the tower body can perform the final treatment on the flue gas in the tower to further dry and purify the gas.

[0024] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A coke adsorption device for treating flue gas in a steelmaking vacuum furnace, characterized in that: It includes legs and a tower body, wherein the legs are arranged below the tower body, and the number of the legs is at least three; the middle part of the tower body is cylindrical, the top and bottom of the tower body are conical, the bottom of the tower body is provided with a downward drainage hole, the top of the tower body is provided with an upward exhaust hole, the inside of the tower body is provided with a first orifice plate, a second orifice plate and a third orifice plate in sequence from top to bottom, the side of the tower body is opened outward with an air inlet hole, the air inlet hole is located between the third orifice plate and the drainage hole, activated coke is stacked on the third orifice plate, a spray pipe is provided above the activated coke to spray water to the activated coke, the spray pipe is located between the second orifice plate and the third orifice plate, the spray pipe is connected to the water channel outside the tower body, and activated carbon is stacked on the second orifice plate.

2. The coke adsorption device for treating flue gas from a steelmaking vacuum furnace according to claim 1, characterized in that: A sampling window is provided on the side of the tower body and above the air inlet. The sampling window is located between the second orifice plate and the third orifice plate and above the spray port of the spray pipe. The sampling window is connected to the exhaust device through a pipeline.

3. The coke adsorption device for treating flue gas of a steelmaking vacuum furnace according to claim 2, characterized in that: A heating coil is arranged above the activated carbon, and water vapor or hot oil flows in the heating coil.

4. The coke adsorption device for treating flue gas of a steelmaking vacuum furnace according to claim 2, characterized in that: A heating coil is arranged above the activated carbon, an electric heating wire is arranged inside the heating coil, a temperature sensor is arranged outside the heating coil, the temperature sensor is electrically connected to a temperature controller, and the electric heating wire is electrically connected to the temperature controller.

5. The coke adsorption device for treating flue gas from a steelmaking vacuum furnace according to claim 3 or 4, characterized in that: Molecular sieves are stacked above the first orifice plate, the drainage hole is connected to the water pump through a pipeline, a liquid level sensor is arranged below the air inlet hole, the liquid level sensor is electrically connected to the controller, and the controller is electrically connected to the water pump.

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