Bag type dust removal device for flue gas of industrial silicon furnace

Abstract

The utility model discloses a bag type dust removal device for flue gas of an industrial silicon furnace. The bag type dust removal device comprises a supporting assembly, an ash bucket assembly, a shell, a stair platform, a valve assembly, a filtering assembly, a main fan assembly and an ash cleaning and discharging assembly. The main fan is located at the rear end of the bag-type dust collector, the bag-type dust collector overcomes self resistance through the fan negative pressure section, the interior of the dust collector is in a negative pressure state, the main fan is located behind the bag-type dust collector, dust-containing flue gas is purified by the bag-type dust collector and becomes clean flue gas, and the problem of fan abrasion can be effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of filter dust cleaning devices, in particular to a bag dust collector for the flue gas of an industrial silicon furnace. Background Art

[0002] When ferrosilicon and industrial silicon are produced in a submerged arc furnace, the silica in the high-temperature area of the furnace reacts with the carbonaceous reducing agent, generating a large amount of dust and waste gas. The industrial silicon soot is usually cleaned and filtered by a reverse blowing bag dust removal device. Most of the existing dust removal in the industrial silicon industry uses a positive pressure reverse blowing bag dust collector. For the positive pressure reverse blowing bag dust collector, the dust-containing gas first passes through the main fan, and the positive pressure after the main fan is used to overcome the resistance of the dust collector. The inside of the dust collector is under positive pressure. The dust-containing flue gas enters the dust collector and is discharged from the louvers of each box body after being filtered through the inner surface of the filter bag. The box body does not require a tight structure and only needs a light enclosure. A smoke exhaust chimney is not set in the technological process. The ash conveying system configured for the positive pressure reverse blowing bag dust collector is positive pressure gas ash conveying. A lock air device is set at the ash discharge port of the ash hopper, and a positive pressure gas ash conveying device is set under the lock air device to convey the ash collected by the filter bag to the densification bin and the ash bin equipment by using positive pressure gas.

[0003] The existing positive pressure reverse blowing bag dust collector has the following defects:

[0004] 1. After the flue gas of the positive pressure bag dust collector is filtered, it is directly discharged from the louvers of the box body without setting a special smoke exhaust chimney. The flue gas is discharged in an unorganized manner, and an environmental protection monitoring device cannot be set, which no longer meets the environmental protection requirements.

[0005] 2. The positive pressure bag dust collector has a simple structure and uses reverse suction for dust cleaning, and cannot achieve intelligent dust cleaning. Its energy consumption during use is relatively high, and the service life of the filter bag is relatively short.

[0006] 3. The positive pressure bag dust collector uses positive pressure gas for ash conveying, and the power source is a Roots blower. The disadvantages are high energy consumption and easy ash blockage.

[0007] 4. The main fan is in the dust-containing flue gas, and it is severely worn. It is easy to generate ash sticking on the impeller, resulting in the imbalance of the fan dynamic balance and reducing the service life of the fan. Content of the Utility Model

[0008] In view of this, the main purpose of the utility model is to provide a bag dust collector for the flue gas of an industrial silicon furnace.

[0009] To achieve the above purpose, the technical solution of the utility model is realized as follows:

[0010] The embodiment of the utility model provides a bag dust collector for the flue gas of an industrial silicon furnace, which includes a support assembly, an ash hopper assembly, a housing, a stair platform, a valve assembly, a filter assembly, a main fan assembly, a flue gas inlet pipe, and an ash cleaning and discharging assembly;

[0011] The support assembly is used to support a plurality of housings. The flue gas inlet pipe is arranged on one side of the first housing. The filtering assembly is arranged inside the housing and is used for filtering flue gas;

[0012] The staircase platform is arranged on one side of the support assembly and extends to the top of the housing for maintenance after climbing the housing;

[0013] The ash hopper assembly is arranged at the bottom of the housing and is used for receiving the dust filtered by the filtering assembly;

[0014] The ash cleaning and discharging assembly is arranged at the bottom of the ash hopper assembly and is used for transporting the dust collected by the ash hopper assembly;

[0015] The main fan assembly is arranged at the tail end of the filtering assembly and is used for discharging the purified gas;

[0016] The valve assembly is arranged at the end of the main fan assembly and is connected to the corresponding connection of a plurality of housings after reaching the top of a plurality of housings.

[0017] In the above solution, the housing includes columns, partition plates, and side plates. Among them, the four sides are surrounded by columns and side plates to form independent compartments, and the inside is distributed into independent small compartments through partition plates.

[0018] In the above solution, the support assembly includes a steel bracket. A plurality of the housings are sequentially connected and arranged on the steel bracket. The staircase platform is arranged on one side of the steel bracket and extends to the top of the housing.

[0019] In the above solution, the filtering assembly includes filter bags, spring suspensions, fixing parts, bag mouth fixing clips, a perforated plate, and support rings. The top of the filter bag is connected to the spring suspension and fixed to the inner top of the housing through the fixing part. The bottom of the filter bag is clamped by the bag mouth fixing bracket. The perforated plate is arranged at the bottom of the filter bag, and the support ring is arranged on the filter bag.

[0020] In the above solution, the ash storage bin, air inlet, first air inlet valve, ash conveying pipe, and ash conveying valve. The top of the ash storage bin is connected to the bottom of the filter bag through the perforated plate. The air inlet is in a horn-shaped structure and is connected to the ash storage bin, and a first air inlet valve is arranged at the end. The bottom of the ash storage bin is provided with an ash conveying pipe, and the ash conveying valve is arranged on the ash conveying pipe.

[0021] In the above solution, the main fan assembly includes a main fan, a reverse air suction pipe, an exhaust pipe, and a chimney. One end of the main fan is connected to the last housing through the exhaust pipe. The other end of the main fan is connected to the chimney through the exhaust pipe. One end of the reverse air suction pipe is connected to the other end of the main fan, and the other end of the reverse air suction pipe extends to the top of a plurality of housings.

[0022] In the above solution, the valve assembly includes a second air inlet valve, and several second air inlet valves are provided on the reverse air suction pipeline respectively, and the several second air inlet valves are respectively connected to several shells correspondingly.

[0023] In the above solution, the dust cleaning and ash discharging assembly includes a dust conveying pipe, a valve plate, a stud, a support plate, a spring, and a sleeve. One end of the dust conveying pipe extends to the bottom of the ash storage bin and is connected to several dust conveying pipes. The sleeve is arranged at the other end of the dust conveying pipe. The support plate is arranged inside the sleeve. The stud is arranged on the support plate. The valve plate is connected to one end of the stud. The spring is arranged at the other end of the stud and is connected to the support plate at one end and fixed by a nut at the other end.

[0024] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0025] In the present utility model, the main fan is located at the rear end of the bag filter. The bag filter utilizes the negative pressure section of the fan to overcome its own resistance, and the inside of the dust collector is in a negative pressure state. The main fan is located behind the bag filter. The dust-containing flue gas is purified by the bag filter and has become clean flue gas, which can effectively solve the problem of fan wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings described herein are used to disclose a further understanding of the present utility model, and constitute a part of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0027] Figure 1 is a schematic structural diagram of a bag type dust removal device for industrial silicon furnace flue gas according to an embodiment of the present utility model;

[0028] Figure 2 is a schematic structural diagram of the filter bag in the filtering state according to an embodiment of the present utility model;

[0029] Figure 3 is a schematic structural diagram of the filter bag in the dust cleaning state according to an embodiment of the present utility model;

[0030] Figure 4 is a schematic structural diagram of the shell according to an embodiment of the present utility model;

[0031] Figure 5 is a schematic structural diagram of the ash hopper according to an embodiment of the present utility model;

[0032] Figure 6 is a schematic closing structural diagram of the dust cleaning and ash discharging assembly according to an embodiment of the present utility model;

[0033] Figure 7 is a schematic opening structural diagram of the dust cleaning and ash discharging assembly according to an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] In order to make the purpose, technical solution and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0035] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of the present utility model, it should be understood that terms such as "first", "second", "third", etc. are only for facilitating the description of the same components and are not intended to indicate or imply the number of the components referred to, and should not be construed as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0036] It should be noted that in this article, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of another identical element in the process, article or device including that element.

[0037] Embodiment 1 of the present utility model provides a bag type dust removal device for the flue gas of an industrial silicon furnace, as Figures 1 - 7 shown, including a support assembly, a hopper assembly 2, a housing 3, a staircase platform 4, a valve assembly, a filter assembly 6, a main fan assembly 7, a flue gas inlet pipe 8, and a dust cleaning and discharging assembly 9;

[0038] The support assembly is used to support a plurality of housings 3, the flue gas inlet pipe 8 is arranged on one side of the head housing 3, and the filter assembly 6 is arranged in the housing 3 for filtering flue gas;

[0039] The staircase platform 4 is arranged on one side of the support assembly and extends to the top of the housing 3 for maintenance after climbing the housing 3;

[0040] The hopper assembly 2 is arranged at the bottom of the housing 3 for receiving the dust filtered by the filter assembly 6;

[0041] The dust cleaning and discharging assembly 9 is arranged at the bottom of the hopper assembly 2 for transporting the dust collected by the hopper assembly 2;

[0042] The main fan assembly 7 is arranged at the tail end of the filter assembly 6 for discharging the purified gas;

[0043] The valve assembly is arranged at the end of the main fan assembly 7, and is placed on the top of several shells 3 and then correspondingly connected to the several shells 3.

[0044] As Figure 1 and Figure 4 shown, the shell 3 includes a column 31, a compartment board 32, and a side panel 33. Among them, an independent chamber is surrounded by the column 31 and the side panel 33 on all sides, and the interior is distributed into independent small chambers through the compartment board 32.

[0045] In the above solution, corresponding length, width, and height spaces are set inside the shell 3 through the compartment board 32 (usually a plate with ribs or a corrugated board structure). As Figure 4 shown, four side panels and the column 31 enclose an independent small chamber.

[0046] As Figure 1 shown, the support assembly includes a steel bracket 1. After several shells 3 are connected in sequence, they are arranged on the steel bracket 1. The staircase platform 4 is arranged on one side of the steel bracket 1 and extends to the top of the shell 3.

[0047] As Figure 1 、 Figure 2 and Figure 3 shown, the filter assembly 6 includes a filter bag 61, a spring suspension 62, a fixing part 63, a bag mouth fixing clip 64, a perforated plate 65, and a support ring 66. The top of the filter bag 61 is connected to the spring suspension 62 and then fixed to the inner top of the shell 3 through the fixing part 63. The bottom of the filter bag 61 is clamped by the bag mouth fixing bracket 64. The perforated plate 65 is arranged at the bottom of the filter bag 61. The support ring 66 is arranged on the filter bag 61 and is used to isolate the dust-containing gas and the filtered clean gas.

[0048] In the above solution, the perforated plate 65 is arranged at the bottom of the independent small chamber. The bag mouth of the filter bag 61 is connected to the perforated plate 65 through the support ring 66, and the tail (top) of the filter bag 61 is suspended on the inner top of the shell 3 through the spring 62.

[0049] In the above solution, the filter bag 61 can be firmly suspended and the suspension force of the filter bag 61 can be adjusted. In the filtering state, the dust-containing gas enters from the bag mouth of the filter bag and forms clean gas after passing through the filter bag 61. In the dust cleaning state, the reverse suction cleaning gas enters from the outside of the filter bag 61 and the inner part of the filter bag contracts, removing the dust filtered inside. The support ring 66 provides a supporting effect for the filter bag to ensure that the filter bag maintains a certain amount of deformation state during filtering and dust cleaning.

[0050] As Figure 1 and Figure 5As shown, the ash storage bin 21, the air inlet 22, the first air inlet valve 23, the ash conveying pipe 24, and the ash conveying valve 25 are provided. The top of the ash storage bin 21 is connected to the bottom of the filter bag 61 through the flower plate 65. The air inlet 22 is of a horn-shaped structure and is connected to the ash storage bin 21, and the first air inlet valve 23 is arranged at the end. The ash conveying pipe 24 is arranged at the bottom of the ash storage bin 21, and the ash conveying valve 25 is arranged on the ash conveying pipe 24.

[0051] In the above solution, the air inlet 22 is arranged in a horn-shaped structure with a specific diffusion angle. On the premise of not being prone to ash accumulation, it meets the requirements of uniform air flow field, low structural resistance, and the unpurified flue gas enters through the air valve 23.

[0052] As Figure 1 shown, the main fan assembly 7 includes a main fan 71, a reverse air suction pipe 73, an exhaust pipe 72, and a chimney 74. One end of the main fan 71 is connected to the end shell 3 through the exhaust pipe 72, and the other end of the main fan 21 is connected to the flue 22 through the exhaust pipe 23. One end of the reverse air suction pipe 24 is connected to the other end of the main fan 21, and the other end of the reverse air suction pipe 24 extends to the tops of several shells 3.

[0053] As Figure 1 shown, the valve assembly includes a second air inlet valve 5. The second air inlet valve 5 includes several, which are respectively arranged on the reverse air suction pipe 24, and several second air inlet valves 5 are respectively connected to several shells 3 correspondingly.

[0054] As Figure 1 、 Figure 6 and Figure 7 shown, the ash cleaning and discharging assembly 9 includes an ash conveying pipe 90, a valve plate 91, a stud 92, a support plate 93, a spring 94, and a sleeve 95. One end of the ash conveying pipe 90 extends to the bottom of the ash storage bin 21 and is connected to several ash conveying pipes 24. The sleeve 95 is arranged at the other end of the ash conveying pipe 90. The support plate 93 is arranged in the sleeve 95. The stud 92 is arranged on the support plate 93. The valve plate 91 is connected to one end of the stud 92. The spring 94 is arranged at the other end of the stud and is connected to the support plate 93 at one end and fixed by a nut at the other end.

[0055] In the above solution, the support plate 93 is a cross support composed of flat steel. When the ash conveying pipe 90 is normally conveying ash, the negative pressure gas is drawn away from each chamber and enters the ash storage bin 21 through the main fan 71. When the dust collector stops the ash cleaning operation and is in the normal filtering state, the main fan 71 does not stop. At this time, the negative pressure in the ash conveying pipe 90 acts on the valve plate 91, overcoming the pulling force of the spring 94, opening the valve plate 91. The negative pressure of the main fan 71 obtains a new balance from the balance valve, preventing damage to the ash conveying pipe 90 and the main fan 71. This valve also has the function of avoiding frequent startup of the ash conveying fan and prolonging the service life of the fan.

[0056] The working principle of the present utility model is as follows:

[0057] As Figures 1 - 7 shown, the purification path of the present utility model is: close the second air inlet valve 5, the flue gas enters the ash storage bin 21 from the flue 22, and after being filtered by the filter bag 61, the purified flue gas is discharged through the exhaust duct 72 and the chimney 74;

[0058] The reverse suction and dust cleaning path is: open the second air inlet valve 5, the purified flue gas sequentially passes through the reverse suction air duct 73, the filter bag 61, the ash storage bin 21, and the ash conveying pipe 24, blowing the dust in the filter bag 61 into the ash storage bin 21, and then collecting and discharging it from the ash storage bin 21 through the ash conveying pipe 24.

[0059] The above is only a preferred embodiment of the present utility model, and is not used to limit the protection scope of the present utility model.

Claims

1. A bag type dust removal device for the flue gas of an industrial silicon furnace, characterized in that, It includes a support component, a hopper component, a housing, a stair landing, a valve component, a filter component, a main fan component, a flue gas inlet pipe, and a dust cleaning and discharging component; The support component is used to support several housings. The flue gas inlet pipe is arranged on one side of the first housing, and the filter component is arranged inside the housing for filtering flue gas; The stair landing is arranged on one side of the support component and extends to the top of the housing for maintenance after climbing the housing; The hopper component is arranged at the bottom of the housing for receiving the dust filtered by the filter component; The dust cleaning and discharging component is arranged at the bottom of the hopper component for transporting the dust collected by the hopper component; The main fan component is arranged at the tail end of the filter component for discharging the purified gas; The valve component is arranged at the end of the main fan component and is connected to several housings correspondingly after being located at the top of several housings.

2. The bag-type dust removal device for the industrial silicon furnace flue gas according to claim 1, characterized in that, The housing includes columns, compartment plates, and side panels. Among them, independent compartments are surrounded by columns and side panels on all sides, and are internally distributed into independent small compartments through compartment plates.

3. The bag-type dust removal device for the industrial silicon furnace flue gas according to claim 2, wherein, The support component includes a steel bracket. Several of the housings are sequentially connected and arranged on the steel bracket. The stair landing is arranged on one side of the steel bracket and extends to the top of the housing.

4. A bag-type dust removal device for the flue gas of an industrial silicon furnace according to claim 3, characterized in that, The filter component includes filter bags, spring suspensions, fixing parts, bag mouth fixing clips, a perforated plate, and support rings. The top of the filter bag is connected to the spring suspension and fixed to the inner top of the housing through the fixing part. The bottom of the filter bag is clamped by the bag mouth fixing bracket. The perforated plate is arranged at the bottom of the filter bag, and the support rings are arranged on the filter bags.

5. A bag type dust removal device for industrial silicon furnace flue gas according to claim 4, characterized in that, A dust storage bin, an air inlet, a first air inlet valve, a dust conveying pipe, and a dust conveying valve. The top of the dust storage bin is connected to the bottom of the filter bag through the perforated plate. The air inlet is a horn-shaped structure and is connected to the dust storage bin, and a first air inlet valve is arranged at the end. The bottom of the dust storage bin is provided with a dust conveying pipe, and the dust conveying valve is arranged on the dust conveying pipe.

6. The bag-type dust removal device for the industrial silicon furnace flue gas according to claim 5, characterized in that, The main fan component includes a main fan, a reverse air suction pipe, an exhaust pipe, and a chimney. One end of the main fan is connected to the last housing through the exhaust pipe, the other end of the main fan is connected to the chimney through the exhaust pipe, one end of the reverse air suction pipe is connected to the other end of the main fan, and the other end of the reverse air suction pipe extends to the top of several housings.

7. The bag type dust removal device for the industrial silicon furnace flue gas according to claim 6, characterized in that, The valve component includes second air inlet valves. There are several second air inlet valves, which are respectively arranged on the reverse air suction pipe, and several of the second air inlet valves are respectively connected to several housings correspondingly.

8. The bag type dust removal device for the industrial silicon furnace flue gas according to claim 7, characterized in that, The dust cleaning and discharging component includes a dust conveying pipe, a valve plate, a stud, a support plate, a spring, and a sleeve. One end of the dust conveying pipe extends to the bottom of the dust storage bin and is connected to several dust conveying pipes. The sleeve is arranged at the other end of the dust conveying pipe. The support plate is arranged inside the sleeve. The stud is arranged on the support plate. The valve plate is connected to one end of the stud. The spring is arranged at the other end of the stud and is connected to the support plate at one end and fixed by a nut at the other end.

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