Combustion control system apparatus and combustion control method for copper refining

Abstract

The present application belongs to copper refining equipment technical field, especially to the combustion control system device and combustion control method for copper refining. The inner cavity of the refining combustion furnace is uniformly provided with several in-furnace mixing cavities, and the middle of the in-furnace mixing cavities is provided with a combustion nozzle; the outer side of the refining combustion furnace is connected with several combustion gas intake assemblies through multiple wireless electromagnetic valves, and the inner side of the multiple wireless electromagnetic valves is communicated in the in-furnace mixing cavities; the combustion gas intake assembly is composed of a natural gas metering tank, a pure oxygen metering tank, a composite intake valve, a pressure valve, a check valve and an intake conveying pipe; the right end gas outlet of the natural gas metering tank and the pure oxygen metering tank is connected with the wireless electromagnetic valve, and the left end gas inlet of the natural gas metering tank and the pure oxygen metering tank is connected with the intake conveying pipe through the composite intake valve. The modular partition natural gas metering device can accurately control the delivery amount of the combustion gas, and greatly reduces the harmful gas and combustible gas formed by insufficient combustion.

Description

Technical Field

[0001] This invention belongs to the technical field of copper refining equipment, and in particular relates to a combustion control system device and combustion control method for copper refining. Background Technology

[0002] In the copper refining process, the waste gas generated by the refining furnace flows underground through a flue and then out of the plant. However, the waste gas generated in the copper refining process contains unburned combustible gases and oxygen, which can easily explode when the conditions for explosion are met. The combustible gases are mainly hydrogen and carbon monoxide, with carbon monoxide mostly resulting from incomplete combustion during copper refining. Incomplete combustion in the copper refining process is affected by many factors, the main reason being insufficient control of the intake gas volume. Traditional combustion gas is metered using a gas flow meter, but due to the many uncertainties in pipeline transportation, the final natural gas cannot be completely burned. Therefore, a combustion control system device and combustion control method for copper refining are provided. Summary of the Invention

[0003] To address the shortcomings and deficiencies of existing technologies, the present invention aims to provide a combustion control system and method for copper refining that is simple in structure, rationally designed, and easy to use. It employs a modular, zoned natural gas metering device, which can accurately control the delivery of combustion gas, significantly reducing harmful gases and combustible gases formed by incomplete combustion. The modular combustion control system is low-cost, quick to maintain, and can be maintained without shutting down the system, resulting in higher safety.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: it includes a refining combustion furnace, an in-furnace mixing chamber, a combustion nozzle, a wireless solenoid valve, and a combustion gas inlet assembly; the inner cavity of the refining combustion furnace is uniformly arranged with several in-furnace mixing chambers, and a combustion nozzle is arranged in the middle of the in-furnace mixing chamber; the outer side of the refining combustion furnace is connected to several combustion gas inlet assemblies through multiple sets of wireless solenoid valves, and the inner sides of the multiple sets of wireless solenoid valves are all connected to the inside of the in-furnace mixing chamber; the combustion gas inlet assembly consists of a natural gas metering tank, a pure oxygen metering tank, a composite inlet valve, a pressure valve, a check valve, and an inlet delivery pipe; the right end outlets of the natural gas metering tank and the pure oxygen metering tank are connected to the wireless solenoid valves, and the left end inlets of the natural gas metering tank and the pure oxygen metering tank are connected to the inlet delivery pipe through the composite inlet valve.

[0005] Preferably, the natural gas metering tank and the pure oxygen metering tank are equipped with a volume regulating airbag inside, which is inflated by an external air nozzle to regulate the internal capacity of the metering tank.

[0006] Preferably, the expansion gas inside the volume regulating airbag is consistent with the gas filling the natural gas metering tank and the pure oxygen metering tank.

[0007] Preferably, the composite intake valve consists of a pressure valve and a check valve; the pressure valve and the check valve are connected by seamless welding technology, wherein the right port of the pressure valve is provided with a pressure detection window, the pressure detection window is connected to a pressure gauge at the upper end of the pressure valve, and the pressure gauge controls the valve core motor to open and close the valve body through the pressure value.

[0008] Preferably, the interior of the furnace mixing chamber is equipped with a spiral baffle to improve the mixing of natural gas and pure oxygen inside the furnace mixing chamber.

[0009] Preferably, the wireless solenoid valve is intermittently activated under the action of the controller, and the wireless solenoid valve and the compound intake valve are interlocked.

[0010] A combustion control method for copper refining, characterized by: its method:

[0011] Step 1: Based on the combustion reaction of natural gas in an oxygen-rich environment and the combustion products, adjust the volume of the natural gas metering tank and the pure oxygen metering tank. The adjustment method is to inflate the volume adjustment air bag through an external air nozzle to adjust the volume of the metering tank. The gas filled in should correspond to the metering gas to avoid metering deviation caused by different gas densities.

[0012] Step 2: The natural gas metering tank and the pure oxygen metering tank are filled with gas through the gas inlet pipe at a standard atmosphere. During this process, the one-way valve inside the composite gas inlet valve prevents the backflow of the mixed gas, and the pressure valve detects the internal pressure of the metering tank and closes in time.

[0013] Step 3: The wireless solenoid valves at the top of the array combustion gas inlet assembly are alternately turned on to deliver the gas from the natural gas metering tank and the pure oxygen metering tank into the mixing chamber inside the furnace for mixing, and then sprayed out from the combustion nozzle for combustion.

[0014] Preferably, in step three, the number of combustion gas inlet components connected to a single furnace mixing chamber is matched with the combustion speed of the combustion nozzle to avoid flameout during combustion.

[0015] Preferably, in step three, the internal baffle in the furnace mixing chamber mixes natural gas and oxygen during the gas mixing process, and guides the mixture to the combustion nozzle through the internal spiral structure.

[0016] Preferably, an arc ignition device is provided at the edge of the outer port of the combustion nozzle in step three.

[0017] With the above structure, the beneficial effects of the present invention are as follows:

[0018] 1. It delivers the combustion gas into independent modular metering tanks according to different components, and each modular metering tank is volume-adjusted according to the best combustion effect; ensuring that the natural gas and oxygen output in a single operation reach the optimal mixing ratio, so that the mixed combustion gas can be completely burned, greatly reducing the harmful gases and combustible gases formed by incomplete combustion.

[0019] 2. A single burner is connected to multiple combustion metering components. Through intermittent gas supply, sufficient buffer time is reserved for gas charging to avoid combustion misfire. Moreover, the modular combustion control system is low-cost and quick to maintain, and can achieve maintenance without stopping the machine, thus ensuring higher safety. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be described in detail below with reference to specific implementations and accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the cross-section of the metering tank of the present invention;

[0023] Figure 3 This is a schematic diagram of the composite intake valve 8 of the present invention;

[0024] Explanation of reference numerals in the attached drawings: 1. Refining combustion furnace; 2. Furnace mixing chamber; 3. Combustion nozzle; 4. Wireless solenoid valve; 5. Combustion gas inlet assembly; 6. Natural gas metering tank; 7. Pure oxygen metering tank; 8. Compound inlet valve; 9. Pressure valve; 10. Check valve; 11. Pressure gauge; 12. Inlet delivery pipe; 13. Volume regulating air bag; 14. External air nozzle; 110. Pressure detection window; 111. Valve core motor. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the invention is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0026] It should also be noted that, in order to avoid obscuring the invention with unnecessary details, only the structures and / or processing steps closely related to the solution according to the invention are shown in the accompanying drawings, while other details that are not closely related to the invention are omitted.

[0027] See as Figures 1-3As shown, this specific embodiment adopts the following technical solution: It includes a refining combustion furnace 1, an in-furnace mixing chamber 2, a combustion nozzle 3, a wireless solenoid valve 4, and a combustion gas inlet assembly 5; the inner cavity of the refining combustion furnace 1 is uniformly arranged with several in-furnace mixing chambers 2, and a combustion nozzle 3 is arranged in the middle of the in-furnace mixing chamber 2; the outer side of the refining combustion furnace 1 is connected to several combustion gas inlet assemblies 5 through multiple sets of wireless solenoid valves 4, and the inner sides of the multiple sets of wireless solenoid valves 4 are all connected to the inside of the in-furnace mixing chamber 2; the combustion gas inlet assembly 5 consists of a natural gas metering tank 6, a pure oxygen metering tank 7, a composite inlet valve 8, a pressure valve 9, a one-way valve 10, and an inlet delivery pipe 12; the right end outlets of the natural gas metering tank 6 and the pure oxygen metering tank 7 are connected to the wireless solenoid valve 4, and the left end inlets of the natural gas metering tank 6 and the pure oxygen metering tank 7 are connected to the inlet delivery pipe 12 through the composite inlet valve 8.

[0028] The natural gas metering tank 6 and the pure oxygen metering tank 7 are equipped with a volume regulating air bladder 13. The volume regulating air bladder 13 is inflated and expanded by an external air nozzle 14 to regulate the internal capacity of the metering tank. The expansion gas inside the volume regulating air bladder 13 is consistent with the gas filling inside the natural gas metering tank 6 and the pure oxygen metering tank 7.

[0029] In addition, the composite intake valve 8 is composed of a pressure valve 9 and a one-way valve 10. The pressure valve 9 and the one-way valve 10 are connected by seamless welding technology. The right port of the pressure valve 9 is provided with a pressure detection window 110, which is connected to the pressure gauge 11 at the upper end of the pressure valve 9. The pressure gauge 11 controls the valve core motor 111 to open and close the valve body through the pressure value.

[0030] Furthermore, the furnace mixing chamber 2 is equipped with a spiral baffle to improve the mixing of natural gas and pure oxygen inside the furnace mixing chamber 2; the wireless solenoid valve 4 is intermittently opened under the action of the controller, and the wireless solenoid valve 4 and the composite air intake valve 8 are interlocked.

[0031] A combustion control method for copper refining, characterized by: its method:

[0032] Step 1: Based on the combustion reaction and combustion products of natural gas in an oxygen-rich environment, adjust the volume of natural gas metering tank 6 and pure oxygen metering tank 7. The adjustment method is to inflate the volume adjustment air bag 13 through the external air nozzle 14 to adjust the volume of the metering tank. The gas filled in should correspond to the metering gas to avoid metering deviation caused by different gas densities.

[0033] Step 2: The natural gas metering tank 6 and the pure oxygen metering tank 7 are filled with gas through the gas inlet pipe 12 at a pressure of 1 standard atmosphere. During this process, the one-way valve 10 inside the composite gas inlet valve 8 prevents the backflow of the mixed gas, and the pressure valve 9 detects the pressure inside the metering tank and closes in time.

[0034] Step 3: The wireless solenoid valve 4 at the top of the array combustion gas inlet assembly 5 is alternately turned on to transport the gas from the natural gas metering tank 6 and the pure oxygen metering tank 7 into the interior of the furnace mixing chamber 2 for mixing, and then sprayed out from the combustion nozzle 3 for combustion.

[0035] In addition, in step three, the number of combustion gas inlet components 5 connected to the single furnace mixing chamber 2 is matched with the combustion speed of the combustion nozzle 3 to avoid flameout. In step three, the internal baffle of the furnace mixing chamber 2 mixes natural gas and oxygen during the gas mixing process and guides the mixture to the combustion nozzle 3 through the internal spiral structure. In step three, an electric arc ignition device is provided on the outer edge of the combustion nozzle 3.

[0036] With the above structure, the beneficial effects of the present invention are as follows:

[0037] It delivers the combustion gas into separate modular metering tanks according to different components, and each modular metering tank is volume-adjusted according to the best combustion effect; ensuring that the natural gas and oxygen output in a single batch reach the optimal mixing ratio, so that the mixed combustion gas can be completely burned, greatly reducing the harmful gases and combustible gases formed by incomplete combustion;

[0038] A single burner is connected to multiple combustion metering components. Through intermittent gas supply, sufficient buffer time is reserved for gas charging to avoid combustion misfire. Moreover, the modular combustion control system is low-cost and quick to maintain, and can achieve maintenance without stopping the machine, thus ensuring higher safety.

[0039] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0040] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A combustion control system device for copper refining, characterized in that: It includes a refining combustion furnace, an internal mixing chamber, a combustion nozzle, a wireless solenoid valve, and a combustion gas inlet assembly. The refining combustion furnace has several internal mixing chambers evenly distributed within its inner cavity, with a combustion nozzle positioned in the center of each mixing chamber. The outer side of the refining combustion furnace is connected to several combustion gas inlet assemblies via multiple sets of wireless solenoid valves, with the inner sides of each set of solenoid valves connected to the interior of the internal mixing chamber. Each combustion gas inlet assembly consists of a natural gas metering tank, a pure oxygen metering tank, a composite inlet valve, and an inlet delivery pipe. The composite inlet valve consists of a pressure valve and a check valve. The right-hand outlets of the natural gas metering tank and the pure oxygen metering tank are connected to the wireless solenoid valve, and the left-hand inlets of the natural gas metering tank and the pure oxygen metering tank are connected to the inlet delivery pipe via the composite inlet valve. The natural gas metering tank and the pure oxygen metering tank are equipped with a volume regulating air bladder inside. The volume regulating air bladder is inflated and expanded by an external air nozzle to regulate the internal capacity of the metering tank.

2. The combustion control system device for copper refining according to claim 1, characterized in that: The expansion gas inside the volume regulating airbag is consistent with the gas filling the natural gas metering tank and the pure oxygen metering tank.

3. The combustion control system device for copper refining according to claim 2, characterized in that: The pressure valve and the check valve are connected by seamless welding technology. The right port of the pressure valve is provided with a pressure detection window, which is connected to a pressure gauge at the upper end of the pressure valve. The pressure gauge controls the valve core motor to open and close the valve body by the pressure value.

4. The combustion control system device for copper refining according to claim 3, characterized in that: The furnace mixing chamber is equipped with a spiral baffle to improve the mixing of natural gas and pure oxygen inside the furnace mixing chamber.

5. The combustion control system device for copper refining according to claim 1, characterized in that: The wireless solenoid valve is intermittently activated under the action of the controller, and the wireless solenoid valve and the compound intake valve are interlocked.

6. A combustion control method for copper refining using the combustion control system apparatus for copper refining according to any one of claims 1-5, characterized in that: Its method: Step 1: Based on the combustion reaction of natural gas in an oxygen-rich environment and the combustion products, adjust the volume of the natural gas metering tank and the pure oxygen metering tank. The adjustment method is to inflate the volume adjustment air bag through an external air nozzle to adjust the volume of the metering tank. The gas filled in should correspond to the metering gas to avoid metering deviation caused by different gas densities. Step 2: Fill the natural gas metering tank and pure oxygen metering tank with gas through the gas inlet pipe. The gas pressure is one standard atmosphere. During this process, the one-way valve inside the composite gas inlet valve prevents the backflow of the mixed gas, and the pressure valve detects the internal pressure of the metering tank and closes in time. Step 3: The wireless solenoid valves at the top of the array combustion gas inlet assembly are alternately turned on to deliver the gas from the natural gas metering tank and the pure oxygen metering tank into the mixing chamber inside the furnace for mixing, and then sprayed out from the combustion nozzle for combustion.

7. The combustion control method for copper refining according to claim 6, characterized in that: In step three, the number of combustion gas inlet components connected to a single furnace mixing chamber is matched with the combustion speed of the combustion nozzle to avoid flameout.

8. The combustion control method for copper refining according to claim 6, characterized in that: In step three, the mixing chamber inside the furnace mixes natural gas and oxygen through an internal baffle plate during the gas mixing process, and then guides the mixture to the combustion nozzle through an internal spiral structure.

9. The combustion control method for copper refining according to claim 6, characterized in that: In step three, an arc ignition device is provided at the edge of the outer port of the combustion nozzle.

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