Flue gas collecting device for cast steel valve electroslag remelting

Abstract

The utility model relates to the technical field of flue gas collection, and discloses a flue gas collection device for cast steel valve electroslag remelting, which comprises a gas collection hood, a gas guide pipe is arranged at the upper end of the gas collection hood, and a waste discharge pipe is arranged on one side of the lower end of the gas guide pipe; the exhaust pipe is arranged in the gas guide pipe and located on one side of the upper end of the waste discharge pipe, and the lower end of the exhaust pipe is provided with a filter cartridge in a threaded fit mode; the injection pipe is arranged in the exhaust pipe, the input end of the injection pipe penetrates through and extends to the outside of the exhaust pipe, a pulse valve is arranged on the side, located outside the exhaust pipe, of the injection pipe, and a pulse controller is arranged on the side, located outside the exhaust pipe, of the injection pipe; and the blowing ring is arranged on one side, positioned outside the blowing pipe, in the filter cartridge. According to the utility model, the pulse backflushing structure is arranged in the exhaust pipe, so that the filter cartridge is convenient to clean.

Description

TECHNICAL FIELD

[0001] The utility model relates to a flue gas collection device for electric slag remelting of cast steel valve. BACKGROUND

[0002] The electric slag remelting of marine corrosion-resistant cast steel valve is a special metallurgical process, mainly used to improve the corrosion resistance of cast steel valve. This process involves electric slag remelting technology, which is a method of using the resistance heat generated by the current passing through the slag as a heat source for smelting. In the electric slag remelting process, the main reason for the generation of flue gas is that the slag used in the electric slag remelting process will react chemically at high temperatures, producing some gases such as hydrogen fluoride and other harmful gases, as well as some smoke. The generation of these flue gases not only affects the air quality of the working environment, but also may harm the health of the operators, so effective collection and treatment are needed.

[0003] The common flue gas collection device sets a gas collecting hood at the exhaust end of the electric slag remelting equipment, and a negative pressure system is set inside the gas collecting hood to generate a certain suction force to suck the generated flue gas into the gas collecting hood. After the flue gas enters the gas collecting hood, it needs to be treated by the filtering system. However, when the adsorption capacity of the filtering system reaches the upper limit, it will block the flow of flue gas, thereby reducing the collection speed of flue gas and the discharge speed of flue gas. Therefore, a flue gas collection device for electric slag remelting of cast steel valve is proposed. SUMMARY

[0004] (I) Technical problem solved

[0005] In view of the shortcomings of the prior art, the utility model provides a flue gas collection device for electric slag remelting of cast steel valve to solve the problems raised in the background technology.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a flue gas collection device for electric slag remelting of cast steel valve, comprising:

[0008] A gas collecting hood is provided with a gas guide pipe at the upper end, and a waste pipe is provided on one side of the lower end of the gas guide pipe;

[0009] An exhaust pipe is arranged inside the gas guide pipe on one side of the upper end of the waste pipe, and a filter cartridge is installed at the lower end of the exhaust pipe by screw thread cooperation;

[0010] A blowpipe is arranged inside the exhaust pipe, the input end of the blowpipe penetrates and extends to the outside of the exhaust pipe, one side of the blowpipe outside the exhaust pipe is provided with a pulse valve, and one side of the waste pipe outside is provided with a pulse controller;

[0011] The spray ring is arranged inside the filter cylinder and on one side of the spray pipe outside, and the spray ring is connected with the spray pipe, and nozzles are arranged on the outer side of the spray ring in a ring shape;

[0012] The first electric valve is arranged inside the air guide pipe, and the second electric valve is arranged inside the lower end of the exhaust pipe;

[0013] The fan is arranged inside the air collecting cover.

[0014] Preferably, the air collecting cover is provided with a check valve at the lower end inside, and the check valve is connected with the air collecting cover, and the check valve is used for preventing backflow of flue gas.

[0015] Preferably, the lower end of the exhaust pipe is provided with a bottom ring, and the bottom ring is connected with the exhaust pipe through thread cooperation, and the thread cooperation makes the bottom ring convenient to disassemble and assemble.

[0016] Preferably, the lower end of the bottom ring is provided with a cloth bag, and the cloth bag is connected with the bottom ring, and the cloth bag is used for collecting particulate matters in flue gas.

[0017] Preferably, the lower end inside of the exhaust pipe is provided with an inner frame inside the filter cylinder, and the inner frame is connected with the exhaust pipe.

[0018] Preferably, the filter cylinder is provided with an inner ring outside the inner frame, and the lower end inside of the inner frame is provided with a vibrator, and the vibrator is used for generating vibration to facilitate the falling of particulate matters outside the filter cylinder.

[0019] (Three) beneficial effects

[0020] Compared with the prior art, the utility model provides a flue gas collecting device for electric slag remelting of cast steel valve, has the following beneficial effects:

[0021] The utility model discloses a pulse backflush structure is set up, uses pulse controller cooperation pulse valve to guide high pressure gas through spray pipe and imports spray ring, then through the nozzle of spray ring outside and sprays backflush filter cylinder, in this way makes the cleaning of filter cylinder convenient and fast, and then restores its filtering function, solves the problem in the background art. ACCOUT OF DRAWINGS

[0022] Figure 1 It is the overall structure perspective drawing of the utility model;

[0023] Figure 2 It is the internal structure section view of the utility model;

[0024] Figure 3 It is the Figure 2 It is the local enlarged view of A area.

[0025] In the figure: 1, gas collecting cover; 2, gas guide pipe; 3, first electric valve; 4, waste pipe; 5, second electric valve; 6, bottom ring; 7, cloth bag storage; 8, pulse controller; 9, check valve; 10, fan; 11, exhaust pipe; 12, blowing pipe; 13, pulse valve; 14, filter cartridge; 15, vibrator; 16, inner frame; 17, blowing ring; 18, nozzle; 19, inner ring. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0027] The utility model provides a technical scheme, a kind of smoke collection device for electroslag remelting of cast steel valve, please refer to Figure 1 、 Figure 2 And Figure 3 , comprising:

[0028] Gas collecting cover 1, the upper end of gas collecting cover 1 is provided with gas guide pipe 2, and the lower end of gas guide pipe 2 is provided with waste pipe 4 on one side;

[0029] Exhaust pipe 11 is arranged in the inside of gas guide pipe 2 on one side of the upper end of waste pipe 4, and filter cartridge 14 is installed at the lower end of exhaust pipe 11 by thread cooperation;

[0030] Blowing pipe 12 is arranged in the inside of exhaust pipe 11, the input end of blowing pipe 12 penetrates and extends to the outside of exhaust pipe 11, pulse valve 13 is arranged on one side of blowing pipe 12 outside exhaust pipe 11, and pulse controller 8 is arranged on one side of waste pipe 4 outside;

[0031] Blowing ring 17 is arranged in the inside of filter cartridge 14 on one side of blowing pipe 12 outside, and blowing ring 17 is connected with blowing pipe 12, and nozzle 18 is arranged on the outside of blowing ring 17 in annular shape;

[0032] First electric valve 3 is arranged in the inside of gas guide pipe 2, and second electric valve 5 is arranged in the inside of the lower end of waste pipe 4;

[0033] Fan 10 is arranged in the inside of gas collecting cover 1.

[0034] Please refer to Figure 2 , check valve 9 is arranged at the lower end in the inside of gas collecting cover 1, and check valve 9 is connected with gas collecting cover 1, so as to prevent smoke backflow.

[0035] Please refer to Figure 1 AndFigure 2 The lower end of the exhaust pipe 4 is provided with a bottom ring 6, and the bottom ring 6 is connected with the exhaust pipe 4 through threaded connection, so that the bottom ring 6 is convenient to disassemble and assemble.

[0036] Please refer to Figure 1 and Figure 2 The lower end of the bottom ring 6 is provided with a cloth bag 7, and the cloth bag 7 is connected with the bottom ring 6, and the cloth bag 7 is used for collecting particulate matters in the flue gas.

[0037] Please refer to Figure 3 The inner lower end of the exhaust pipe 11 is provided with an inner frame 16 inside the filter cartridge 14, and the inner frame 16 is connected with the exhaust pipe 11.

[0038] Please refer to Figure 3 The inner ring 19 is arranged inside the filter cartridge 14 and outside the inner frame 16, and the lower end of the inner frame 16 is provided with a vibrator 15, and the vibrator 15 is used for generating vibration to facilitate the falling of particulate matters outside the filter cartridge 14.

[0039] The scheme: the gas collecting hood 1 is connected with the exhaust end of the electroslag remelting, the fan 10 is started to generate airflow for exhaust, the exhaust speed is improved, the flue gas flows along the air guide pipe 2 to the filter cartridge 14, the outer wall of the filter cartridge 14 filters the flue gas, and the particulate matters are intercepted outside, the air passes through the filter cartridge 14 and is discharged from the exhaust pipe 11, when the filter cartridge 14 needs to be cleaned, the first electric valve 3 and the fan 10 are closed and the second electric valve 5 is opened, the input end of the blowing pipe 12 is connected with the high-pressure gas source, the pulse controller 8 is used to control the pulse valve 13 to start, so that the high-pressure gas source is introduced into the blowing ring 17 through the blowing pipe 12, and then the particulate matters adhered to the outside of the filter cartridge 14 are ejected through the nozzle 18 to make the particulate matters fall into the cloth bag 7, the vibrator 15 is started to generate vibration, the vibration is transmitted to the filter cartridge 14 through the inner ring 19, so that the filter cartridge 14 is shaken and the falling speed of the particulate matters is improved.

[0040] It should be noted that, in the present document, the terms such as first and second, etc. are used merely to differentiate one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Also, the terms "comprises", "comprising", or any other variations thereof are intended to cover non-exclusive inclusions, so that a process, method, article, or apparatus including a list of elements does not only include those elements, but also includes other elements not explicitly listed, or inherent to such process, method, article, or apparatus.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fume collecting device for electroslag remelting of a cast steel valve, characterized in that, The utility model relates to a kind of exhaust gas treatment device, including: Gas hood (1), the upper end of gas hood (1) is provided with air guide pipe (2), the lower end of air guide pipe (2) is provided with exhaust pipe (4) on one side; Exhaust pipe (11) is arranged in the inside of air guide pipe (2) and is located on the upper end of exhaust pipe (4) on one side, the lower end of exhaust pipe (11) is provided with filter cartridge (14) by screw fit; Injection pipe (12) is arranged in the inside of exhaust pipe (11), the input end of injection pipe (12) is extended to the outside of exhaust pipe (11) by penetrating, the one side of injection pipe (12) located outside exhaust pipe (11) is provided with pulse valve (13), the one side of exhaust pipe (4) outside is provided with pulse controller (8); Injection ring (17) is arranged in the inside of filter cartridge (14) and is located on the one side outside injection pipe (12), and injection ring (17) is connected with injection pipe (12), the outside of injection ring (17) is provided with nozzle (18) along annular; First electric valve (3) is arranged in the inside of air guide pipe (2), the lower end of exhaust pipe (4) is provided with second electric valve (5) in the inside; Fan (10) is arranged in the inside of gas hood (1).

2. The smoke collection device for electroslag remelting of a cast steel valve according to claim 1, characterized in that: The lower end of the inside of gas hood (1) is provided with check valve (9), and check valve (9) is connected with gas hood (1).

3. The smoke collection device for electroslag remelting of cast steel valve according to claim 1, characterized in that: The lower end of exhaust pipe (4) is provided with bottom ring (6), and bottom ring (6) is connected with exhaust pipe (4) by screw fit.

4. The smoke collecting device for electroslag remelting of cast steel valve according to claim 3, characterized in that: The lower end of bottom ring (6) is provided with storage cloth bag (7), and storage cloth bag (7) is connected with bottom ring (6).

5. The smoke collecting device for electroslag remelting of steel valve according to claim 1, characterized in that: The lower end of the inside of exhaust pipe (11) is provided with inner frame (16) in the inside of filter cartridge (14), and inner frame (16) is connected with exhaust pipe (11).

6. The smoke collecting device for electroslag remelting of steel valve according to claim 5, characterized in that: Inner ring (19) is arranged in the inside of filter cartridge (14) and is located outside inner frame (16), and the lower end of the inside of inner frame (16) is provided with vibrator (15).

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