Flue gas cooling device for copper smelting rotary anode furnace

Abstract

The utility model relates to the technical field of non-ferrous metal smelting, and discloses a smoke cooling device for a copper smelting rotary anode furnace, which comprises a smoke mixing chamber outlet flue copper water jacket, a horizontal flue copper water jacket, a three-way copper water jacket and a vertical flue copper water jacket which are communicated in sequence, the smoke mixing chamber outlet flue copper water jacket, the horizontal flue copper water jacket, the three-way copper water jacket and the vertical flue copper water jacket are each provided with a plurality of water inlets and water outlets, and the water inlets and the water outlets are connected through an external water tank. According to the utility model, the flue water jacket is introduced to replace flue gas cooling equipment such as a spray cooler, so that the content of water vapor in the flue gas of the anode furnace can be reduced, the problems of corrosion of the flue and facilities and the like caused by a large amount of acid-containing condensed water in the main flue gas pipeline of the anode furnace are avoided, the negative pressure required by normal production of the system is ensured, and the production load is improved. In addition, water for the water jacket of the flue is circulating water and can be reused, so that the purpose of saving energy can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of nonferrous metal smelting, in particular to a flue gas cooling device for a copper smelting rotary anode furnace. Background Art

[0002] At present, the copper smelting rotary anode furnace uses natural gas as fuel and reducing agent, and the moisture content of the flue gas is higher than that of the flue gas produced by other processes; in terms of flue gas treatment, the common flue gas treatment process is: anode furnace → "Z" flue → secondary combustion chamber → horizontal steel flue → vertical steel flue → spray cooler → plate cooler → bag dust collector → smoke exhaust fan → ring collection desulfurization. The interior of the horizontal steel flue is composed of 115mm thick insulation bricks and 25mm thick castable cushion layer, and the vertical steel flue is cast with 115mm thick castable.

[0003] However, during the production process, due to factors such as high flue gas temperature and high moisture content in the flue, when passing through the horizontal steel flue, the surface is deformed due to the influence of thermal stress for a long time, causing the internal refractory bricks to be squeezed and fall off, eventually causing the entire flue to burn out and be scrapped; when passing through the vertical flue, under the action of weakly acidic and high-strength metal smoke, a large amount of smoke is adsorbed on the surface of the castable, and the long-term accumulation will cause serious ash accumulation in the flue, and the steel structure support will have insufficient tensile strength, resulting in the risk of the flue tilting or collapse; with the scouring and corrosion of the flue gas, the internal castable will also partially fall off, causing the surface of the steel flue to be in direct contact with the high-temperature flue gas, and the steel flue will be corroded and gradually become thinner until holes appear, resulting in smoke leakage, affecting normal production; and the fallen castable is easy to reach the junction of the flue and the horizontal flue, blocking the flue gas pipe, and the flue gas cannot pass normally, affecting the normal production of the anode furnace.

[0004] On the other hand, according to production needs, the flue gas during the reduction period needs to be cooled by a spray cooler after coming out of the vertical steel flue, which further increases the water vapor content in the anode furnace flue gas. Since the spray cooler uses high-pressure air and cooling water to form a cooling water mist, it can evaporate quickly after contacting with the high-temperature flue gas, releasing a large amount of water vapor. A large amount of flue gas gathers instantly at the reaction site, causing the pressure to change, which in turn affects the internal pressure of the anode furnace, causing the internal pressure of the furnace to be unstable during the reduction period, affecting the reduction rate and increasing natural gas consumption. In addition, the interior of the spray cooler is lined with high-temperature resistant castables. Due to flue gas erosion and corrosion, the internal castables are prone to falling off. On average, the spray cooler needs to be dismantled and replaced every 3 to 4 years, and the spray cooler itself is difficult to overhaul, the cost is high, and the construction period is long.

[0005] On the other hand, due to the high air leakage rate of the plate cooler, a large amount of cold air is mixed into the flue gas, causing the flue gas temperature to drop rapidly. The amount of acid condensed water in the bag dust collector, smoke exhaust fan and rear-end flue gas pipeline increases, causing corrosion of the flue and facilities. Utility Model Content

[0006] The utility model aims to provide a flue gas cooling device for a copper smelting rotary anode furnace to solve the problems raised in the above-mentioned background technology.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] A flue gas cooling device for a copper smelting rotary anode furnace comprises a copper water jacket of a smoke mixing chamber outlet flue, a horizontal flue copper water jacket, a three-way copper water jacket and a vertical flue copper water jacket which are connected in sequence, wherein the copper water jacket of the smoke mixing chamber outlet flue, the horizontal flue copper water jacket, the three-way copper water jacket and the vertical flue copper water jacket are all hollow cylindrical structures, and the copper water jacket of the smoke mixing chamber outlet flue, the horizontal flue copper water jacket, the three-way copper water jacket and the vertical flue copper water jacket are all provided with a plurality of water inlets and water outlets, and the water inlets and the water outlets are connected through an external water tank.

[0009] The copper water jacket of the flue at the outlet of the smoke mixing chamber is connected to the copper water jacket of the horizontal flue through a flange, and the copper water jacket of the flue at the outlet of the smoke mixing chamber is provided with four water inlets and four water outlets.

[0010] The horizontal flue copper water jacket at least comprises a horizontal flue copper water jacket I and a horizontal flue copper water jacket II which are connected in sequence through flanges. The horizontal flue copper water jacket I and the horizontal flue copper water jacket II are both provided with four water inlets and four water outlets.

[0011] Both ends of the three-way copper water jacket are respectively connected to the horizontal flue copper water jacket and the vertical flue copper water jacket through flanges, and the three-way copper water jacket is provided with three water inlets and three water outlets.

[0012] The vertical flue copper water jacket at least includes vertical flue copper water jacket I, vertical flue copper water jacket II, vertical flue copper water jacket III and vertical flue copper water jacket IV which are connected in sequence by flanges, and vertical flue copper water jacket I, vertical flue copper water jacket II, vertical flue copper water jacket III and vertical flue copper water jacket IV are each provided with three water inlets and three water outlets.

[0013] The branch pipes connected to the water inlet and the water outlet are both provided with flow control valves and water surface mirrors.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0015] The utility model introduces a flue water jacket to replace the mist cooler and other flue gas cooling equipment, which can reduce the water vapor content in the flue gas of the anode furnace, eliminate the problems of flue and facility corrosion caused by large amount of acid condensed water in the main flue gas pipeline of the anode furnace, and ensure the negative pressure required for normal production of the system, thereby increasing the production load. In addition, the water used in the flue water jacket is circulating water, which can be reused, thereby achieving the purpose of saving energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] In the figure: copper water jacket 1 of smoke mixing chamber outlet flue, copper water jacket Ⅰ2 of horizontal flue, copper water jacket Ⅱ3 of horizontal flue, copper water jacket 4 of three-way flue, copper water jacket Ⅰ5 of vertical flue, copper water jacket Ⅱ6 of vertical flue, copper water jacket Ⅲ7 of vertical flue, copper water jacket Ⅳ8 of vertical flue. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Generally, the components of the embodiment of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] like Figure 1 As shown, the utility model provides a flue gas cooling device for a copper smelting rotary anode furnace, comprising a smoke mixing chamber outlet flue copper water jacket 1, a horizontal flue copper water jacket, a three-way copper water jacket 4 and a vertical flue copper water jacket which are connected in sequence, the smoke mixing chamber outlet flue copper water jacket 1, the horizontal flue copper water jacket, the three-way copper water jacket 4 and the vertical flue copper water jacket all adopt a copper shell, the smoke mixing chamber outlet flue copper water jacket, the horizontal flue copper water jacket, the three-way copper water jacket and the vertical flue copper water jacket are all provided with a plurality of water inlets and outlets, the water inlets and the water outlets are connected through an external water tank, thereby forming a water cooling cycle for reducing the smoke temperature in the pipeline.

[0021] The copper water jacket 1 of the flue at the outlet of the smoke mixing chamber is a hollow cylindrical structure. The copper water jacket 1 of the flue at the outlet of the smoke mixing chamber is connected to the copper water jacket of the horizontal flue through a flange. Four water inlets and four water outlets are arranged on the copper water jacket 1 of the flue at the outlet of the smoke mixing chamber. Flow control valves and water surface mirrors are arranged on the branch pipes connected to the water inlets and the water outlets.

[0022] The horizontal flue copper water jacket is a hollow cylindrical structure, which is connected to the three-way copper water jacket 4 through a flange. The horizontal flue copper water jacket at least includes a horizontal flue copper water jacket Ⅰ2 and a horizontal flue copper water jacket Ⅱ3 which are connected in sequence through flanges. Four water inlets and four water outlets are arranged on the horizontal flue copper water jacket Ⅰ2 and the horizontal flue copper water jacket Ⅱ3, and flow control valves and water surface mirrors are arranged on the branch pipes connected to the water inlets and the water outlets.

[0023] The three-way copper water jacket 4 is a hollow cylindrical structure, which is connected to the vertical flue copper water jacket through a flange. The three-way copper water jacket 4 is provided with three water inlets and three water outlets, and the branch pipes connected to the water inlets and outlets are provided with flow control valves and water surface mirrors.

[0024] The vertical flue copper water jacket at least includes vertical flue copper water jacket Ⅰ5, vertical flue copper water jacket Ⅱ6, vertical flue copper water jacket Ⅲ7 and vertical flue copper water jacket Ⅳ8 which are connected in sequence by flanges. Three water inlets and three water outlets are arranged on the vertical flue copper water jacket Ⅰ5, vertical flue copper water jacket Ⅱ6, vertical flue copper water jacket Ⅲ7 and vertical flue copper water jacket Ⅳ8. Flow control valves and water surface mirrors are arranged on the branch pipes connected to the water inlets and the water outlets.

[0025] The working principle of the utility model is as follows: when in use, water is directly introduced into the water inlet, at which time the flue water jacket is filled with water, and then the hot water generated after heat exchange is released from the water outlet to form a water cooling cycle, which can well control the flue gas temperature of the anode furnace, reduce the water vapor content in the flue gas, effectively protect the main flue gas pipeline of the anode furnace, extend the service life of the main flue gas pipeline, ensure the stability of the pressure inside the furnace, and save natural gas.

Claims

1. A flue gas cooling device for a copper smelting rotary anode furnace, characterized in that: The invention comprises a copper water jacket (1) for a smoke mixing chamber outlet flue, a horizontal flue copper water jacket, a three-way copper water jacket (4) and a vertical flue copper water jacket which are connected in sequence, wherein the copper water jacket (1) for the smoke mixing chamber outlet flue, the horizontal flue copper water jacket, the three-way copper water jacket (4) and the vertical flue copper water jacket are all hollow cylindrical structures, and the copper water jacket (1) for the smoke mixing chamber outlet flue, the horizontal flue copper water jacket, the three-way copper water jacket (4) and the vertical flue copper water jacket are all provided with a plurality of water inlets and water outlets, and the water inlets and water outlets are connected via an external water tank.

2. The flue gas cooling device for a copper smelting rotary anode furnace according to claim 1, characterized in that: The copper water jacket (1) of the flue at the outlet of the smoke mixing chamber is connected to the copper water jacket of the horizontal flue via a flange, and the copper water jacket (1) of the flue at the outlet of the smoke mixing chamber is provided with four water inlets and four water outlets.

3. The flue gas cooling device for a copper smelting rotary anode furnace according to claim 1, characterized in that: The horizontal flue copper water jacket at least comprises a horizontal flue copper water jacket I (2) and a horizontal flue copper water jacket II (3) which are connected in sequence through flanges. The horizontal flue copper water jacket I (2) and the horizontal flue copper water jacket II (3) are both provided with four water inlets and four water outlets.

4. The flue gas cooling device for a copper smelting rotary anode furnace according to claim 1, characterized in that: Both ends of the three-way copper water jacket (4) are respectively connected to the horizontal flue copper water jacket and the vertical flue copper water jacket through flanges, and the three-way copper water jacket (4) is provided with three water inlets and three water outlets.

5. The flue gas cooling device for a copper smelting rotary anode furnace according to claim 2, characterized in that: The vertical flue copper water jacket at least comprises a vertical flue copper water jacket I (5), a vertical flue copper water jacket II (6), a vertical flue copper water jacket III (7) and a vertical flue copper water jacket IV (8) which are connected in sequence by flanges, and the vertical flue copper water jacket I (5), the vertical flue copper water jacket II (6), the vertical flue copper water jacket III (7) and the vertical flue copper water jacket IV (8) are all provided with three water inlets and three water outlets.

6. A flue gas cooling device for a copper smelting rotary anode furnace according to any one of claims 1 to 5, characterized in that: The branch pipes connected to the water inlet and the water outlet are both provided with flow control valves and water surface mirrors.

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