Rapid switching device for submerged arc furnace body and water-cooling flue connector

Abstract

The utility model belongs to the technical field of submerged arc furnace metallurgical equipment, and particularly relates to a rapid switching device for a submerged arc furnace body and a water-cooling flue connector, which comprises a submerged arc furnace body and a water seal tank, a submerged arc furnace cover is arranged above the submerged arc furnace body, and a raw gas connector is connected above the submerged arc furnace cover. The raw gas connector and the water seal tank are fixed through an alloy flange, the water seal tank is located above the raw gas connector, the upper portion of the water seal tank is connected with the barrel, the cooling bell jar is arranged on the periphery above the barrel, the annular water supply pipe is arranged on the periphery below the barrel, the water seal tank is communicated with the annular water supply pipe, and the lifting lugs are arranged on the periphery of the top end of the cooling bell jar. A water outlet is formed in the top of the barrel, the top of the barrel is connected with a gas diffusion pipe, and a connector is formed in the side wall of the barrel and externally connected with a water-cooling flue. According to the device, rapid switching between a dry method system and a wet method system is achieved, metal fatigue of the barrel shell is relieved, the service life is prolonged, and the durability of the device is effectively enhanced.

Description

Technical Field

[0001] The utility model belongs to the technical field of submerged arc furnace metallurgical equipment, and particularly relates to a quick switching device for the interface between a submerged arc furnace body and a water-cooled flue. Background Art

[0002] The submerged arc furnace, also known as an electric arc furnace or a resistance furnace, is mainly used for reducing and smelting ores, and mainly produces ferroalloys such as ferrosilicon, ferromanganese, ferrochrome, ferrotungsten, and silicomanganese alloy, which are important industrial raw materials in the metallurgical industry and chemical raw materials such as calcium carbide. When the submerged arc furnace is smelting, a large amount of high-temperature dust-containing furnace gas containing a high concentration of CO is generated. The purified gas after cooling, dust removal, and purification is sent to a switching station by a fan to achieve effective recovery of the gas.

[0003] There are two methods for purifying the high-temperature and high-dust gas of the submerged arc furnace, namely wet dust removal and dry dust removal. Wet dust removal is to quickly wash the high-temperature gas by spraying and cooling. The furnace ash is easy to go out, and the high-temperature raw gas is quickly reduced to the saturation temperature in a short time, which is one of the factors to eliminate explosion, and safe operation can be achieved. However, wet dust removal has problems such as high energy consumption, large water consumption, complex sewage treatment, and high operation cost; dry dust removal adopts a purification method combining indirect physical cooling and a bag filter, which has the advantages of small resistance, low energy consumption, no water consumption, no wastewater treatment, and low operation cost. However, the dust content of the purified gas is greater than 10mg / Nm 3 , which is difficult to meet the national ultra-low emission standard, and dry dust removal has a large floor area, high maintenance cost, a narrow effective working temperature range, large equipment vibration, and if the operation level of the staff is not good, a large number of filter bags will be burned.

[0004] At present, the gas purification system of the submerged arc furnace combines the dry system and the wet system, and quickly switches according to the flue gas characteristics and emission requirements. The switching device for the interface between the submerged arc furnace body and the water-cooled flue has the problems of inability to quickly switch, being not durable, and inconvenient for overhaul and maintenance. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a quick switching device for the interface between a submerged arc furnace body and a water-cooled flue, so as to solve the problems that the existing switching device cannot quickly switch, is not durable, and is inconvenient for overhaul and maintenance.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A quick-switching device for the interface between a submerged arc furnace body and a water-cooled flue, comprising a submerged arc furnace body and a water seal tank. Above the submerged arc furnace body is a submerged arc furnace cover, and above the submerged arc furnace cover is connected a raw gas interface. The raw gas interface is fixed to the water seal tank through an alloy flange, and the water seal tank is located above the raw gas interface. Above the water seal tank is connected a cylinder body. Around the upper part of the cylinder body is provided a cooling bell, and around the lower part of the cylinder body is provided an annular water supply pipe. The water seal tank is communicated with the annular water supply pipe. Around the top end of the cooling bell are provided lifting lugs. At the top of the cylinder body is opened a water outlet, and at the top of the cylinder body is connected a gas relief pipe. On the side wall of the cylinder body is opened an interface, and the interface is externally connected to a water-cooled flue through a connection mode of a tiger mouth clamp.

[0008] A temperature measuring point is arranged at the interface of the cylinder body, and a high-temperature resistant thermocouple sensor is installed at the temperature measuring point, which can effectively monitor the temperature of the gas at the outlet of the submerged arc furnace.

[0009] The water-cooled flue is in an "L" shape and forms a 90° angle with the cylinder body.

[0010] The material of the alloy flange is 310S stainless steel.

[0011] The water seal tank adopts a U-shaped structure, and the operating water level is greater than the production gas pressure, which can prevent gas leakage.

[0012] A lifting device is arranged above the cylinder body.

[0013] The lifting device is an electric hoist.

[0014] The beneficial effects obtained by the present utility model are as follows:

[0015] (1) The rapid switching between the dry method system and the wet method system is realized on the submerged arc furnace body, meeting the production environment of high temperature and high dust;

[0016] (2) The simplicity and safety of the switching process are ensured by combining the water seal tank, the annular water supply pipe and the lifting device;

[0017] (3) The U-shaped structure of the water seal tank is easy for the lifting of the bell, meeting the requirements of rapid switching, and can also prevent air backflow and avoid explosion;

[0018] (4) The annular water supply pipe evenly distributes the flow rate of the cooling soft water, efficiently and evenly takes away the high-temperature heat inside the bell of the cylinder body, reduces the metal fatigue of the cylinder body shell, prolongs the service life, and effectively enhances its durability;

[0019] (5) The connection mode of the tiger mouth clamp is adopted for the interface of the cylinder body, which is convenient for connection and disassembly, and the design is flexible;

[0020] (6) The bell is quickly lifted by the electric hoist, which is convenient for maintenance and switching. Description of the Drawings

[0021] Figure 1 This is a schematic structural diagram of the present utility model.

[0022] Description of reference numerals: 1, submerged arc furnace body; 2, submerged arc furnace cover; 3, raw gas interface; 4, alloy flange; 5, water seal tank; 6, annular water supply pipe; 7, cylinder body; 8, cooling bell; 9, lifting lug; 10, water-cooled flue; 11, water outlet; 12, gas relief pipe; 13, high-temperature thermocouple sensor; 13, lifting equipment. Specific embodiments

[0023] The technical solution of the present utility model will be described in detail below with reference to the drawings and embodiments.

[0024] As Figure 1 shown, a quick switching device for the interface between a submerged arc furnace body and a water-cooled flue includes a submerged arc furnace body 1 and a water seal tank 5. A submerged arc furnace cover 2 is provided above the submerged arc furnace body 1. A raw gas interface 3 is connected above the submerged arc furnace cover 2. The raw gas interface 3 and the water seal tank 5 are fixed by an alloy flange 4. And the water seal tank 5 is located above the raw gas interface 3. The material of the alloy flange 4 is 310S stainless steel. The water seal tank 5 adopts a U-shaped structure. The operating water level is greater than the production gas pressure, which can prevent gas leakage. The water seal tank 5 is connected above to a cylinder body 7. A cooling bell 8 is provided on the outer periphery above the cylinder body 7. An annular water supply pipe 6 is provided on the outer periphery below the cylinder body 7. The annular water supply pipe 6 is convenient for evenly distributing the flow rate of cooling soft water. The water seal tank 5 is communicated with the annular water supply pipe 6. Lifting lugs 9 are provided around the top end of the cooling bell 8. A water outlet 11 is opened at the top of the cylinder body 7. A gas relief pipe 12 is connected to the top of the cylinder body 7. The gas relief pipe 12 is used to release gas and replace nitrogen during shutdown and maintenance. The gas relief pipe opening is designed to prevent rain and blockage. An interface is opened on the side wall of the cylinder body 7. The interface is externally connected to a water-cooled flue 10 by means of a tiger mouth clamp. The interface of the cylinder body 7 adopts the connection method of a tiger mouth clamp, which is convenient for connection and disassembly. The water-cooled flue 10 is in an "L" shape and forms a 90° angle with the cylinder body 7. A temperature measuring point is provided at the interface of the cylinder body 7. A high-temperature thermocouple sensor 13 is installed at the temperature measuring point.

[0025] A lifting equipment 14 is provided above the cylinder body 7. The lifting equipment 14 is an electric hoist. The electric hoist is connected to the lifting lug 9 by a cable. The electric hoist is made of explosion-proof and anti-static materials to ensure safety performance in a flammable and explosive gas atmosphere. On the one hand, it tightly holds the cooling bell during use, reduces the load of the switching device on the submerged arc furnace, and prevents damage to the submerged arc furnace mouth. On the other hand, it quickly lifts the cooling bell for convenient maintenance and switching.

Claims

1. A quick switching device for the interface between the furnace body of a submerged arc furnace and a water-cooled flue, characterized in that, It includes a submerged arc furnace body (1) and a water seal tank (5). Above the submerged arc furnace body (1), there is a submerged arc furnace cover (2). Above the submerged arc furnace cover (2), there is a connection to a raw gas interface (3). The raw gas interface (3) is fixed to the water seal tank (5) through an alloy flange (4), and the water seal tank (5) is located above the raw gas interface (3). Above the water seal tank (5), there is a connection to a cylinder body (7). Around the upper part of the cylinder body (7), there is a cooling bell (8). Around the lower part of the cylinder body (7), there is an annular water supply pipe (6). The water seal tank (5) is communicated with the annular water supply pipe (6). Around the top periphery of the cooling bell (8), there are lifting lugs (9). At the top of the cylinder body (7), there is a water outlet (11). At the top of the cylinder body (7), there is a connection to a gas relief pipe (12). On the side wall of the cylinder body (7), there is an interface, and the interface is externally connected to a water-cooled flue (10) through a tiger mouth clamp connection method.

2. The quick switching device for the interface between the submerged arc furnace body and the water-cooled flue according to claim 1, characterized in that, A temperature measuring point is arranged at the interface of the cylinder body (7), and a high-temperature thermocouple sensor (13) is installed at the temperature measuring point.

3. The quick-switching device for the interface between the submerged arc furnace body and the water-cooled flue according to claim 2, characterized in that, The water-cooled flue (10) is in an "L" shape and forms a 90° angle with the cylinder body (7).

4. The quick switching device for the interface between the submerged arc furnace body and the water-cooled flue according to claim 3, characterized in that The material of the alloy flange (4) is 310S stainless steel.

5. A quick switching device for the interface between a submerged arc furnace body and a water-cooled flue according to any one of claims 1 or 4, characterized in that, The water seal tank (5) adopts a U-shaped structure.

6. The quick switching device for the interface between the submerged arc furnace body and the water-cooled flue according to claim 5, characterized in that A lifting device (14) is arranged above the cylinder body (7).

7. The quick switching device for the interface between the submerged arc furnace body and the water-cooled flue according to claim 6, characterized in that, The lifting device (14) is an electric hoist.

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