Dust removal fan for blast furnace casting house

Abstract

The dust removal fan for the blast furnace casting house comprises a shell, an air inlet is formed in one side of the shell; an air outlet is formed in the upper side of the shell; an impeller is rotationally arranged in the shell; a plurality of blades are arranged in the circumferential direction of the impeller; a motor is arranged on one side of the shell; the motor rotating shaft drives the impeller to rotate through the coupler; a high-pressure water pump is arranged on one side of the shell; a water inlet of the high-pressure water pump is communicated with a liquid supply pipeline; a water outlet of the high-pressure water pump is communicated with a high-pressure conveying pipeline outside the shell; the high-pressure conveying pipeline is in an arc shape and is attached to the two sides and the lower side of the shell. The high-pressure conveying pipeline is arranged opposite to the blades; the high-pressure conveying pipeline extends into the shell and is provided with a plurality of high-pressure nozzles; a drain outlet is formed in the bottom of the shell; and the lower side of the shell is connected with the sewage outlet and provided with a sewage tank. The high-pressure conveying pipeline sprays liquid to the high-pressure sprayers arranged opposite to the blades in the shell, the impeller and the blades in the fan are cleaned, and dust adhering to the impeller and the blades is cleaned and washed away.

Description

TECHNICAL FIELD

[0001] The utility model belongs to dust removal equipment field, especially, relate to a blast furnace casthouse dust removal fan. BACKGROUND

[0002] The casthouse is the discharge and collection place of molten iron and slag, which is the high-temperature and dusty operation area in front of the blast furnace. A large amount of smoke dust is generated during the process of tapping the blast furnace. The common method for removing the smoke dust in the casthouse is to use a fan to drive a bag-type dust collector to remove dust. The bag-type dust collector can efficiently capture the smoke dust, thereby realizing the treatment of the smoke dust. However, during use, dust may leak into the fan from the bag-type dust collector. The dust may adhere to the blades of the fan wheel, which may result in a decrease in the power of the fan, corrosion of the impeller, and an increase in the wear degree. After long-term use, the fan may have a risk of operation, and it is necessary to stop the fan regularly for cleaning and maintenance. The operation and maintenance costs are increased, and the normal dust removal work in the casthouse is affected. SUMMARY

[0003] The utility model aims at providing a blast furnace casthouse dust removal fan to solve the technical problem that, during use, dust may leak into the fan from the bag-type dust collector, the dust may adhere to the blades of the fan wheel, which may result in a decrease in the power of the fan, corrosion of the impeller, and an increase in the wear degree. After long-term use, the fan may have a risk of operation, and it is necessary to stop the fan regularly for cleaning and maintenance. The operation and maintenance costs are increased, and the normal dust removal work in the casthouse is affected.

[0004] To achieve the above-mentioned purpose, the utility model discloses a blast furnace casthouse dust removal fan, which has the following specific technical solutions:

[0005] A blast furnace casthouse dust removal fan, comprising a shell, an air inlet arranged on one side of the shell, an air outlet arranged on the upper side of the shell, an impeller rotatably arranged in the shell, a plurality of blades arranged in the circumferential direction of the impeller, a motor arranged on one side of the shell, a shaft of the motor driving the impeller to rotate through a shaft coupling, a high-pressure water pump arranged on one side of the shell, a liquid supply pipeline connected to the water inlet of the high-pressure water pump, a high-pressure delivery pipeline connected to the water outlet of the high-pressure water pump and extending out of the shell, the high-pressure delivery pipeline being arranged in an arc shape and attached to the two sides and the lower side of the shell, the high-pressure delivery pipeline being arranged opposite to the blades, a plurality of high-pressure nozzles arranged on the high-pressure delivery pipeline and extending into the shell, a sewage outlet arranged at the bottom of the shell, and a sewage tank connected to the sewage outlet and arranged on the lower side of the shell.

[0006] Further, the axis of the high-pressure nozzle and the rotation axis of the impeller form an angle of 20-40°.

[0007] Further, a filter screen is slidably arranged in the air outlet of the shell.

[0008] The utility model discloses a blast furnace casthouse dust removal fan has the following advantages: when the fan uses a certain time and has dust adhered, through the high -pressure water pump that is provided with on the casing one side, uses high -pressure water pump and imports high -pressure liquid to the high -pressure delivery pipeline that is provided with to the casing both sides and downside, sprays liquid to the multiple high -pressure nozzles that are set up to the opposite blade in the casing through the high -pressure delivery pipeline, and the impeller, blade in the fan is cleaned, utilizes high -pressure liquid and washes away the dust that adheres on the impeller and blade, prevents the hard particle (such as metal scrap) and embeds the surface of impeller, reduces the wear and tear risk of abrasive grain, and the impeller pneumatic efficiency recovers after cleaning, and the fan motor load drops, reduces the energy consumption of fan operation, restores the power of fan, and simultaneously multiple high -pressure nozzles are arranged on the outside of impeller, ensure that clean full coverage, and there is no cleaning dead angle, reduce the artificial maintenance cost, and adapt to the demand of continuous production of casthouse, and the blast furnace casthouse furnace front temperature is higher, when the dust removal fan temperature is higher or reaches the warning value when operating in the high temperature environment for a long time, can import cooling liquid to the high -pressure delivery pipeline through the high -pressure water pump, and the inside of fan is cooled by high -pressure nozzle and sprays cooling liquid, and the cooling efficiency is higher compared to natural cooling, avoids the long shutdown of dust removal fan, and maintains the continuous production of casthouse. BRIEF DESCRIPTION OF DRAWINGS

[0009] Fig. 1 It is the whole structure schematic diagram of the utility model;

[0010] Fig. 2 It is the motor mounting structure schematic diagram of the utility model;

[0011] Fig. 3 It is the section structure schematic diagram of the utility model;

[0012] Mark explanation in drawing: 1, casing;2, air inlet;3, air outlet;4, impeller;5, blade;6, motor;7, shaft coupling;8, high -pressure water pump;9, liquid supply pipeline;10, high -pressure delivery pipeline;11, high -pressure nozzle;12, blowdown;13, sewage tank;14, filter screen. DETAILED DESCRIPTION

[0013] In order to better understand the purpose, structure and function of the utility model, the utility model a blast furnace casthouse dust removal fan is further described in detail below in conjunction with the drawings.

[0014] For example Figs. 1-3As shown, the utility model discloses a blast furnace casthouse dust removal fan, including the casing 1, the casing 1 one side is provided with the air inlet 2, the casing 1 upside is provided with the air outlet 3, the casing 1 is rotatably provided with the impeller 4, the impeller 4 is provided with a plurality of blades 5 peripherally, the casing 1 one side is provided with motor 6, the motor 6 rotating shaft drives the impeller 4 rotation through the coupling 7, the casing 1 one side is provided with high pressure water pump 8, high pressure water pump 8 water inlet is communicated with the liquid supply pipeline 9, and high pressure water pump 8 water outlet is communicated with the high pressure delivery pipeline 10 outside the casing 1, and the high pressure delivery pipeline 10 is arranged on the both sides and the downside of the casing 1 in arc shape, and the high pressure delivery pipeline 10 is arranged relative to the position of blade 5, and the high pressure delivery pipeline 10 extends into the casing 1 and is provided with a plurality of high pressure spray heads 11, and the casing 1 bottom is provided with the blow-off port 12, and the casing 1 downside is provided with the sewage tank 13 connected with the blow-off port 12.

[0015] Combine Figs. 1-3 As shown, in use, the air outlet 3 of the bag filter is communicated with the air inlet 2 of the dust removal fan, when the casthouse needs to carry out dust removal work, start motor 6, and the motor 6 drives the impeller 4 and blade 5 in the fan to rotate through the coupling 7, forms negative pressure in the bag filter, and the smoke dust in the casthouse is sucked into the bag filter to carry out dust removal, when the dust leaked from the bag filter is adsorbed on the fan impeller 4 and blade 5 after a certain time of use, the dust removal fan is stopped at the interval of stopping of the casthouse to stop dust removal, the cleaning liquid is supplied to high pressure water pump 8 through liquid supply pipeline 9, high pressure water pump 8 is started, the cleaning liquid is delivered to high pressure delivery pipeline 10, then is sprayed out through a plurality of high pressure spray heads 11, and the opposite impeller 4 and blade 5 are cleaned, the dust adhered on the impeller 4 and blade 5 is cleaned and washed away by high pressure liquid, prevents hard particles (such as metal scraps) from embedding on the surface of impeller 4, reduces the risk of abrasive wear, the cleaned sewage enters the sewage tank 13 through blow-off port 12 and is stored, the pneumatic efficiency of the cleaned impeller 4 is restored, the load of fan motor 6 is reduced, the energy consumption of fan operation is reduced, the power of fan is restored, and simultaneously, a plurality of high pressure spray heads 11 are arranged in arc shape on the outside of impeller 4, ensure that cleaning is fully covered, there is no cleaning dead angle, reduce the cost of manual maintenance, and adapt to the needs of continuous production of casthouse.

[0016] In the process of delivering liquid to high pressure water pump 8 through liquid supply pipeline 9, and then cleaning impeller 4 through high pressure delivery pipeline 10 and a plurality of high pressure spray heads 11, different liquids can be introduced into high pressure water pump 8 through liquid supply pipeline 9 to achieve different effects, water-based cleaning agent can be introduced into high pressure water pump 8 through liquid supply pipeline 9 to clean the dust on the impeller 4 and blade 5, reduce the damage caused by mechanical scraping of dust or metal particles on the impeller 4 and blade 5, rust-proof lubricating maintenance liquid can be introduced into high pressure water pump 8 through liquid supply pipeline 9 to prevent rusting of impeller 4 and reduce dust adhesion, prolong the service life of impeller 4, and reduce manual downtime maintenance.

[0017] When the temperature of the dust removal fan running in the high temperature environment for a long time is high or reaches the warning value, the high-pressure water pump 8 can be used to send cooling liquid such as pure water or glycol water solution into the high-pressure conveying pipeline 10, and the high-pressure spray head 11 is used to spray the cooling liquid to continuously cool the inside of the fan, so that the cooling efficiency is higher than that of natural cooling, the metal in the fan is prevented from deforming due to high temperature creep, the dynamic balance of the fan impeller 4 is ensured, the dust removal fan is prevented from stopping for a long time, and the continuous production of the cast house is maintained.

[0018] The high-pressure spray head 11 is arranged at an inclination angle with the fan impeller 4, the inclination angle is 20-40°, the liquid sprayed by the high-pressure spray head 11 can cover a larger area, when the dust removal fan is stopped for cleaning, the liquid sprayed by the high-pressure spray head 11 can drive the fan impeller 4 and the blades 5 to rotate, so that the fan impeller 4 and the blades 5 can be cleaned in all directions, the cleaning dead angle is reduced, the cleaning effect is improved, and the impact stress of the liquid sprayed vertically by the high-pressure spray head 11 is reduced, so that the liquid waste and secondary pollution of sewage caused by rebound and splashing of the liquid are reduced.

[0019] The filter screen 14 is arranged in the air outlet 3 of the shell 1, the dust particles leaked by the bag filter arranged in front of the dust removal fan are filtered again by the filter screen 14, the cleanliness of the discharged air is improved, the dust emission pollution is reduced, and the sewage generated by cleaning the fan impeller 4 and the blades 5 by using the high-pressure spray head 11 can be filtered and intercepted by the filter screen 14, so that new pollution caused by cleaning the fan impeller 4 and the blades 5 is prevented.

[0020] It can be understood that the utility model is described through some embodiments, and those skilled in the art know that various changes or equivalent replacements can be made to these features and embodiments without departing from the spirit and range of the utility model.In addition, under the guidance of the utility model, these features and embodiments can be modified to adapt to specific conditions and materials without departing from the spirit and range of the utility model.Therefore, the utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application belong to the range protected by the utility model.

Claims

1. A dust removal fan for a blast furnace tapping area, characterized in that, Includes a housing (1); an air inlet (2) is provided on one side of the housing (1); an air outlet (3) is provided on the upper side of the housing (1); an impeller (4) is rotatably installed inside the housing (1); the impeller (4) has multiple blades (5) arranged circumferentially; a motor (6) is provided on one side of the housing (1); the shaft of the motor (6) drives the impeller (4) to rotate through a coupling (7); a high-pressure water pump (8) is provided on one side of the housing (1); a liquid supply pipe (9) is connected to the inlet of the high-pressure water pump (8); high pressure A high-pressure conveying pipe (10) is provided at the outlet of the water pump (8) to the outside of the shell (1); the high-pressure conveying pipe (10) is arc-shaped and fits against the sides and bottom of the shell (1); the high-pressure conveying pipe (10) is positioned relative to the blade (5); multiple high-pressure nozzles (11) are provided in the high-pressure conveying pipe (10) extending into the shell (1); a sewage outlet (12) is provided at the bottom of the shell (1); a sewage tank (13) is provided on the bottom side of the shell (1) connected to the sewage outlet (12).

2. The dust removal fan for the blast furnace tapping area according to claim 1, characterized in that, The axis of the high-pressure nozzle (11) forms an angle of 20-40° with the axis of rotation of the impeller (4).

3. The dust removal fan for the blast furnace tapping area according to claim 1, characterized in that, The housing (1) has a filter screen (14) slidably disposed inside the air outlet (3).

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