Novel furnace top air spray gun device for combusting carbon monoxide of oxygen-enriched side-blown furnace

Abstract

The utility model relates to a novel furnace top air spray gun device for burning carbon monoxide of an oxygen-enriched side-blown furnace, which comprises a furnace top air spray gun, the surface of the furnace top air spray gun is respectively provided with a fire retardant valve, a first manual ball valve and a second manual ball valve from top to bottom, and the top of the furnace top air spray gun is provided with an infrared thermometer; an air inlet pipe is arranged on the outer surface of the furnace top air spray gun, the air inlet pipe is arranged between the infrared thermometer and the fire-retardant valve, and the end part of the air inlet pipe is connected with a first connecting pipe; a connecting flange is mounted on the outer surface of the furnace top air spray gun. The problems that the tail gas RTO treatment cost is too high, a waste heat boiler is coked and hardened, and elemental sulfur in a flue is blocked due to excessive carbon monoxide and organic matter residues in the flue gas containing copper and nickel hazardous waste treated by an oxygen-enriched side-blown bath smelting immersion combustion technology are solved. Meanwhile, a tail gas treatment device is protected, the tail gas treatment cost of the oxygen-enriched side-blown converter is reduced, and the heat utilization rate and the metal direct recovery rate of the oxygen-enriched side-blown converter are improved.

Description

Technical Field

[0001] This utility model relates to the field of pyrometallurgical technology, specifically to a novel furnace top air spray gun device for burning carbon monoxide in an oxygen-enriched side-blown furnace. Background Technology

[0002] Currently, the immersion combustion treatment of copper and nickel hazardous waste in oxygen-enriched side-blown furnaces has become a research hotspot in the industry. However, when oxygen-enriched side-blown furnaces are used to treat copper and nickel hazardous solid waste, the secondary and tertiary air systems originally installed in the furnaces cannot effectively treat the carbon monoxide and some organic matter generated. This can easily lead to problems such as excessively high RTO treatment costs for tail gas, coking and caking in the waste heat boiler, and elemental sulfur blockage in the flue. In severe cases, it can cause abnormal shutdown of the oxygen-enriched side-blown furnace, which is not conducive to the smooth operation of the furnace. Utility Model Content

[0003] The purpose of this invention is to provide a novel top air spray gun device for burning carbon monoxide in an oxygen-enriched side-blown furnace, in order to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows.

[0005] A novel top air spray nozzle device for burning carbon monoxide in an oxygen-enriched side-blown furnace includes a top air spray nozzle. From top to bottom, a flame arrestor valve, a first manual ball valve, and a second manual ball valve are installed on the surface of the top air spray nozzle. An infrared thermometer is installed on the top of the top air spray nozzle. An air inlet pipe is provided on the outer surface of the top air spray nozzle, positioned between the infrared thermometer and the flame arrestor valve. A first connecting pipe is connected to the end of the air inlet pipe. A connecting flange is installed on the outer surface of the top air spray nozzle.

[0006] Furthermore, a second connecting pipe is connected to the end of the first connecting pipe, and the end of the second connecting pipe is connected to the valve station. A third manual ball valve is installed on the second connecting pipe, and a pressure gauge and a flow meter are respectively installed on the second connecting pipe on both sides of the third manual ball valve. A check valve is installed on the first connecting pipe.

[0007] Furthermore, the first connecting pipe is a flexible metal tube made of special stainless steel.

[0008] Furthermore, the nozzle of the furnace top air spray gun is narrowed.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows.

[0010] 1. This utility model uses a top-mounted air jet gun inserted from the top of the furnace to blow air, which increases the amount of air blowing from the top of the furnace, effectively burning carbon monoxide and significantly reducing the treatment cost of tail gas RTO.

[0011] 2. This utility model can set up an air curtain between the charging port and the vertical flue by spraying air from the furnace top, which reduces the amount of material sucked into the waste heat boiler and bag filter by the exhaust fan, thereby reducing the dust rate of the oxygen-enriched side-blown furnace and improving the direct metal recovery rate.

[0012] 3. This utility model utilizes the heat generated by the combustion of carbon monoxide in an oxygen-enriched side-blown furnace through top air to spray onto the surface of the smelting slag, which helps to raise the temperature of the smelting slag and improves the thermal utilization rate of the furnace.

[0013] 4. This utility model can effectively burn some of the residual organic matter through the top air of the furnace, protect the waste heat boiler and bag filter, and significantly reduce the COD treatment cost of desulfurization wastewater. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a partial structural schematic diagram of the present invention.

[0016] In the diagram: 1. Furnace top air spray gun; 2. Flame arrestor valve; 3. First manual ball valve; 4. Second manual ball valve; 5. Infrared thermometer; 6. Air inlet pipe; 7. First connecting pipe; 8. Second connecting pipe; 9. Third manual ball valve; 10. Pressure gauge; 11. Flow meter; 12. Connecting flange; 13. Check valve. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] like Figure 1-2 As shown, a novel top air spray gun device for burning carbon monoxide in an oxygen-enriched side-blown furnace includes a top air spray gun 1. From top to bottom, a flame arrestor valve 2, a first manual ball valve 3, and a second manual ball valve 4 are respectively installed on the surface of the top air spray gun 1. An infrared thermometer 5 is installed on the top of the top air spray gun 1. An air inlet pipe 6 is provided on the outer surface of the top air spray gun 1, and the air inlet pipe 6 is positioned between the infrared thermometer 5 and the flame arrestor valve 2. A first connecting pipe 7 is connected to the end of the air inlet pipe 6. A connecting flange 12 is installed on the outer surface of the top air spray gun 1.

[0019] The furnace top air spray gun 1 is a cylindrical long tube with a wall thickness of 10mm and a length of 3-4m. The inner pipe diameter is DN50-80. A pre-drilled hole with a diameter of DN150 is made in the top of the oxygen-enriched side-blown furnace. A flange is installed at the opening. The furnace top air spray gun 1 is inserted into the pre-drilled hole in the top of the oxygen-enriched side-blown furnace and fixed by the connecting flange 12. At this time, the length inserted into the oxygen-enriched side-blown furnace is 2.5-3.3m, and the length left outside the oxygen-enriched side-blown furnace is about 0.5-0.7m. A compressed air duct and valve station are installed 3-5 meters around the opening to provide compressed air to the furnace top air spray gun 1 through the first connecting pipe 7. The pressure of the compressed air is 0.06MPa.

[0020] When compressed air is blown out from the nozzle of the top air spray gun 1 and forms top air in the oxygen-enriched side-blown furnace, the increase in top air can effectively burn carbon monoxide and significantly reduce the treatment cost of tail gas RTO.

[0021] The injection of top air can create an air curtain between the charging port and the vertical flue, reducing the amount of material drawn into the waste heat boiler and bag filter by the exhaust fan, thus lowering the dust rate of the oxygen-enriched side-blown furnace and increasing the direct metal recovery rate. The heat generated by the combustion of carbon monoxide in the oxygen-enriched side-blown furnace is sprayed onto the smelting slag surface, helping to raise the slag temperature and improving the furnace's thermal utilization rate. Top air can effectively burn some residual organic matter, protecting the waste heat boiler and bag filter, and significantly reducing the COD treatment cost in desulfurization wastewater.

[0022] The flow rate of compressed air is adjusted by the first manual ball valve 3 and the second manual ball valve 4. The double ball valves have good sealing performance, and the temperature of the molten pool surface can be monitored by the infrared thermometer 5.

[0023] It is worth noting that the flame arrestor valve 2, the first manual ball valve 3, and the second manual ball valve 4 are all non-spring type structures to avoid obstructing the infrared thermometer 5. In addition, the first manual ball valve 3 and the second manual ball valve are normally open during use.

[0024] The infrared thermometer 5 is a gas-injection protected type, which can prevent contamination, reduce the influence of temperature, and improve measurement accuracy.

[0025] Preferably, the end of the first connecting pipe 7 is connected to a second connecting pipe 8, and the end of the second connecting pipe 8 is connected to a valve station. A third manual ball valve 9 is installed on the second connecting pipe 8, and a pressure gauge 10 and a flow meter 11 are respectively installed on the second connecting pipe 8 on both sides of the third manual ball valve 9. A check valve 13 is installed on the first connecting pipe 7.

[0026] Compressed air enters the first connecting pipe 7 through the second connecting pipe 8, and then enters the furnace top air spray gun 1 through the air inlet pipe 6 to achieve furnace top blowing. The flow rate and pressure of the compressed air can be monitored by setting the pressure gauge 10 and the flow meter 11.

[0027] Preferably, the first connecting pipe 7 is a metal flexible hose, and the material is special stainless steel.

[0028] The properties of metal hoses not only provide sufficient strength to ensure the safe delivery of compressed air, but also mitigate vibrations during compressed air delivery, reducing the impact on the furnace top air spray gun 1.

[0029] Preferably, the nozzle of the furnace top air spray gun 1 is narrowed.

[0030] The diameter reduction ranges from DN25 to 40. The reduction process can increase the injection speed and distance of compressed air.

[0031] There are two ways to install the furnace top air spray gun 1: inserting the furnace top air spray gun 1 during furnace shutdown and inserting the furnace top air spray gun 1 during normal operation of the oxygen-enriched side-blown furnace.

[0032] During the shutdown process, insert the top air spray gun 1: First, check whether all instruments and meters are normal. Connect the compressed air valve station and the top air spray gun 1, and ensure that all valves are closed. Then, open the valves to purge the pipeline. In the air supply state, close the first manual ball valve 3 to test the instruments and valves. After the pipeline purging is completed, close all valves, stop the compressed air, and finally insert the top air spray gun 1 and connect the connecting flange 12 for fixation. Before starting the oxygen-enriched side-blown furnace, first open the first manual ball valve 3, then open the third manual ball valve 9, and adjust the flow rate.

[0033] Inserting the top air spray gun 1 during normal operation of the oxygen-enriched side-blown furnace: First, check whether all instruments and meters are normal. Connect the compressed air valve station and the top air spray gun 1, ensuring that all valves are closed. Then, open the valves to purge the pipeline. In the air-circulating state, close the first manual ball valve 3 to test the instruments and valves. After the pipeline is purged, adjust the flow rate to a small amount to ensure that the top air spray gun 1 is operating normally. Then, insert the top air spray gun 1 and connect the connecting flange 12 for fixation. Finally, gradually increase the compressed air flow rate to the normal value.

[0034] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0035] The above is a detailed description of the present invention in conjunction with specific embodiments, and it should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, any equivalent substitutions or obvious modifications made without departing from the concept of the present invention, and which have the same performance or use, should be considered as falling within the patent protection scope defined by the submitted claims.

Claims

1. A novel top air spray gun device for burning carbon monoxide in an oxygen-enriched side-blown furnace, comprising a top air spray gun (1), characterized in that: The surface of the furnace top air spray gun (1) is equipped with a flame arrestor valve (2), a first manual ball valve (3) and a second manual ball valve (4) from top to bottom. An infrared thermometer (5) is installed on the top of the furnace top air spray gun (1). The outer surface of the furnace top air spray gun (1) is provided with an air inlet pipe (6), and the air inlet pipe (6) is located between the infrared thermometer (5) and the flame arrestor (2). The end of the air inlet pipe (6) is connected to a first connecting pipe (7). A connecting flange (12) is installed on the outer surface of the furnace top air spray gun (1).

2. The novel oxygen-enriched side-blown furnace top air spray gun device for burning carbon monoxide according to claim 1, characterized in that: The end of the first connecting pipe (7) is connected to a second connecting pipe (8), and the end of the second connecting pipe (8) is connected to the valve station; A third manual ball valve (9) is installed on the second connecting pipe (8), and a pressure gauge (10) and a flow meter (11) are respectively installed on the second connecting pipe (8) and on both sides of the third manual ball valve (9). A check valve (13) is installed on the first connecting pipe (7).

3. The novel oxygen-enriched side-blown furnace top air jet device for burning carbon monoxide according to claim 1, characterized in that: The first connecting pipe (7) is a metal flexible tube and is made of special stainless steel.

4. The novel oxygen-enriched side-blown furnace top air spray gun device for burning carbon monoxide according to claim 1, characterized in that: The nozzle of the furnace top air spray gun (1) is reduced in diameter.

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