Industrial silicon dust removal, cleaning and ash conveying device

Abstract

The utility model discloses an industrial silicon dust removal, ash cleaning and ash conveying device, including a smoke inlet pipe, a negative pressure dust removal mechanism, a main fan mechanism, a reverse suction mechanism, a cyclone dust removal mechanism, and a dense bin mechanism. The bag dust collector in the utility model is negative pressure operated, the main fan is located at the rear end of the bag dust collector, and the fan wear problem can be effectively solved. The bag dust collector shell is a sealed wallboard structure, and each chamber is an independent chamber. The dust-containing gas enters the clean gas flue after being filtered inside the filter bag and enters the chimney through the main fan for discharge. An environmental monitoring point is provided on the chimney to achieve ultra-low emissions.

Description

Technical Field

[0001] The utility model relates to the technical field of dust cleaning devices, in particular to an industrial silicon dust removal, dust cleaning and dust conveying device. Background Art

[0002] Most of the existing dust removal in the industrial silicon industry uses positive pressure back-blowing bag dust collectors. The dust-containing gas in the positive pressure back-blowing bag dust collector first passes through the main fan, then enters the bag dust collector, and is filtered on the inner surface of the filter bag before being discharged from the shutters of the box. Therefore, the box does not need a strict structure, only a light enclosure is required. An air inlet valve and a back-blowing valve are provided at the entrance of each chamber. When a chamber is cleaned, the air inlet valve of the chamber is closed, the back-blowing valve is opened, and the back-blowing airflow (atmosphere) enters from the shutters and passes through the filter bag in the opposite direction to achieve dust cleaning. The back-blowing airflow carries the dust into the adjacent chamber for dust removal. When conveying ash, the back-blowing air valve is closed, the ash discharge valve at the bottom of the ash hopper is opened, and the dust falls into the ash conveying pipe below. The dust is conveyed to the encryption equipment through the Roots blower at the front end of the ash conveying pipe.

[0003] At present, the positive pressure reverse air bag dust collector used in dust removal in the industrial silicon industry has the following defects:

[0004] 1. The main fan of the positive pressure bag filter is at the front end of the bag filter. The dust concentration at the fan inlet is high, the microsilica powder is highly abrasive, and the fan blades are severely worn. The shell of the positive pressure bag filter is a non-sealed structure, and the chambers are not independently sealed. The dust-containing gas is directly discharged into the atmosphere after being filtered by the filter bag. There is no fixed dust monitoring point, which does not meet the ultra-low emission environmental protection requirements. In addition, the equipment has a large temperature drop, which has a great impact on the downstream nitrogen oxide control, namely the SCR denitrification efficiency.

[0005] 2. The back-blowing wind for cleaning comes from the cold air outside, which will not only reduce the flue gas temperature of the system, but also cause bag sticking and high operating resistance due to the influence of the water content in the air, resulting in increased system energy consumption.

[0006] 3. The back-blowing cleaning method is adopted, and the equipment is operated at positive pressure. When cleaning, the back-blowing fan must not only overcome the resistance of the filter bag and the dust on the surface of the filter bag, but also overcome the positive pressure of the dust removal gas in the adjacent room. The back-suction fan is large in size and has high energy consumption.

[0007] 4. Cleaning the ash first and then transporting it will cause dust to accumulate in the ash hopper, resulting in poor ash discharge and blockage.

[0008] 5. The Roots blower uses positive pressure to transport ash, which increases extra power consumption and the ash transport pipe is prone to blockage. Utility Model Content

[0009] In view of this, the main purpose of the utility model is to provide an industrial silicon dust removal, cleaning and ash conveying device.

[0010] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0011] The utility model provides an industrial silicon dust removal, cleaning and ash conveying device, including a smoke inlet pipe, a negative pressure dust removal mechanism, a main fan mechanism, a reverse suction mechanism, a cyclone dust removal mechanism, and an encrypted bin mechanism;

[0012] One end of the negative pressure dust removal mechanism is connected to one end of the smoke inlet pipe, and is used to receive the dust-containing smoke entering the smoke pipe and then perform dust removal;

[0013] The upper end of the negative pressure dust removal mechanism is connected to the two ends of the main fan mechanism, so that when the negative pressure dust removal mechanism accumulates dust, the main fan mechanism can transport the purified flue gas to the negative pressure dust removal mechanism for dust removal and discharge the purified flue gas;

[0014] The lower end of the negative pressure dust removal mechanism is connected to one end of the cyclone dust removal mechanism, so that when the negative pressure dust removal mechanism is cleaned, the reverse suction mechanism transports the cleaned dust-containing flue gas to the cyclone dust removal mechanism to collect dust;

[0015] The encryption chamber mechanism is arranged at the bottom of the cyclone dust removal mechanism, and is used to receive the dust in the cyclone dust removal mechanism and encrypt it;

[0016] One end of the reverse air suction mechanism is connected to the outlet of the cyclone dust removal mechanism, and the other end of the reverse air suction mechanism is connected to the flue gas inlet pipe, which is used to provide power when the main fan mechanism transports the purified flue gas to the negative pressure dust removal mechanism for cleaning after dust accumulation in the negative pressure dust removal mechanism.

[0017] In the above scheme, the negative pressure dust removal mechanism includes a first negative pressure dust removal component and a second negative pressure dust removal component, and the first negative pressure dust removal component and the second negative pressure dust removal component are arranged in parallel.

[0018] In the above scheme, the first negative pressure dust removal component includes a first sealed shell, a first ash hopper, a first filter bag, a first air inlet valve, and a first ash discharge valve. A group of first filter bag groups is arranged in the first sealed shell. Each group of the first filter bag groups is composed of a number of the first filter bags connected in series, which are used to filter the flue gas. The first output end of the flue gas inlet pipe is installed with the first air inlet valve and is placed at the bottom of the first sealed shell. The first ash hopper is arranged at the bottom of the first sealed shell, and the first ash discharge valve is arranged at the bottom of the first ash hopper.

[0019] In the above scheme, the second negative pressure dust removal assembly includes a second sealed shell, a second ash hopper, a second filter bag, a second air inlet valve, and a second ash discharge valve. A group of second filter bag groups is arranged in the second sealed shell. Each group of the second filter bag groups is composed of a number of second filter bags connected in series, which are used to filter smoke. The second output end of the smoke inlet pipe is installed with a second air inlet valve and is placed at the bottom of the second sealed shell. The second ash hopper is arranged at the bottom of the second sealed shell, and the second ash discharge valve is arranged at the bottom of the second ash hopper.

[0020] In the above scheme, the main fan mechanism includes a main fan, a chimney, a first reverse air suction duct, and an exhaust duct. One end of the main fan is connected to the first sealed shell and the second sealed shell respectively after the first air outlet valve and the second air outlet valve are arranged in the exhaust duct. The other end of the main fan is connected to the chimney through the exhaust duct. The first reverse air suction valve and the second reverse air suction valve are arranged at one end of the first reverse air suction duct, and are connected to the first sealed shell and the second sealed shell respectively after the first reverse air suction valve and the second reverse air suction valve are arranged. The other end of the first reverse air suction duct is connected to the other end of the main fan.

[0021] In the above scheme, the cyclone dust removal mechanism includes a cyclone dust collector and an ash conveying pipe, one end of the ash conveying pipe is connected to the bottom of the first ash hopper and the second ash hopper respectively, and the other end of the ash conveying pipe is connected to the inlet of the cyclone dust collector.

[0022] In the above solution, the encryption bin mechanism includes an encryption bin, and the top of the encryption bin is connected to the bottom of the cyclone dust collector.

[0023] In the above scheme, the reverse suction mechanism includes a reverse suction fan and a second reverse suction duct, one end of the second reverse suction duct is connected to the outlet of the cyclone dust collector, and the other end of the second reverse suction duct is connected in series with the reverse suction fan and then connected to the flue gas inlet pipe.

[0024] Compared with the prior art, the utility model has the following beneficial effects:

[0025] The utility model uses negative pressure operation in the bag dust collector, and the main fan is located at the rear end of the bag dust collector, which can effectively solve the problem of fan wear. The bag dust collector shell is a sealed wall panel structure, and each chamber is an independent chamber. The dust-containing gas is filtered inside the filter bag and enters the clean gas flue through the main fan into the chimney for discharge. The chimney is equipped with an environmental monitoring point to achieve ultra-low emissions. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0027] Figure 1 This is a schematic diagram of the structure of an industrial silicon dust removal, cleaning and ash conveying device according to an embodiment of the utility model;

[0028] Figure 2 It is a structural schematic diagram of the negative pressure dust removal mechanism described in an embodiment of the utility model. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0030] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present utility model, it should be understood that the terms "first", "second", "third", etc. are only for the convenience of distinguishing and describing the same components, rather than indicating or implying the number of the referred elements, and cannot be understood as a limitation of this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0031] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, article or device. In the absence of more restrictions, an element defined by the sentence "includes a ..." does not exclude the existence of other identical elements in the process, article or device including the element.

[0032] The utility model provides an industrial silicon dust removal, cleaning and ash conveying device, such as Figure 1 and Figure 2 As shown, it includes a smoke inlet pipe 7, a negative pressure dust removal mechanism 1, a main fan mechanism 2, a reverse suction mechanism 3, a cyclone dust removal mechanism 4, and an encrypted bin mechanism 5;

[0033] One end of the negative pressure dust removal mechanism 1 is connected to one end of the smoke inlet pipe 7, and is used to receive the dust-containing smoke in the smoke inlet pipe 7 and then perform dust removal;

[0034] The upper end of the negative pressure dust removal mechanism 1 is connected to the two ends of the main fan mechanism 2, so that when the negative pressure dust removal mechanism 1 is dusty, the main fan mechanism 2 transports the purified flue gas to the negative pressure dust removal mechanism 1 for dust removal and discharges the purified flue gas;

[0035] The lower end of the negative pressure dust removal mechanism 1 is connected to one end of the cyclone dust removal mechanism 4, so that when the negative pressure dust removal mechanism 1 is cleaned, the reverse suction mechanism 3 transports the cleaned dust-containing flue gas to the cyclone dust removal mechanism 4 to collect dust;

[0036] The encryption chamber mechanism 5 is arranged at the bottom of the cyclone dust removal mechanism 4, and is used to receive the dust in the cyclone dust removal mechanism 4 and encrypt it;

[0037] One end of the reverse air suction mechanism 3 is connected to the outlet of the cyclone dust removal mechanism 4, and the other end of the reverse air suction mechanism 3 is connected to the flue gas inlet pipe 7, which is used to provide power when the main fan mechanism 2 transports the purified flue gas to the negative pressure dust removal mechanism 1 for cleaning after dust accumulation in the negative pressure dust removal mechanism 1.

[0038] like Figure 1 and Figure 2 As shown, the negative pressure dust removal mechanism 1 includes a first negative pressure dust removal component and a second negative pressure dust removal component, and the first negative pressure dust removal component and the second negative pressure dust removal component are arranged in parallel.

[0039] like Figure 1 and Figure 2 As shown, the first negative pressure dust removal assembly includes a first sealed shell 11, a first ash hopper 12, a first filter bag 13, a first air inlet valve 14, and a first ash discharge valve 10. A group of first filter bag groups is arranged in the first sealed shell 11. Each group of the first filter bag groups is composed of a plurality of first filter bags 13 connected in series, which are used to filter flue gas. The first output end of the flue gas inlet pipe 7 is installed with a first air inlet valve 14 and is placed at the bottom of the first sealed shell 11. The first ash hopper 12 is arranged at the bottom of the first sealed shell 11, and the first ash discharge valve 10 is arranged at the bottom of the first ash hopper 12.

[0040] like Figure 1 and Figure 2 As shown, the second negative pressure dust removal assembly includes a second sealed shell 15, a second ash hopper 17, a second filter bag 16, a second air inlet valve 18, and a second ash discharge valve 19. A group of second filter bag groups is arranged in the second sealed shell 15, and each group of the second filter bag groups is composed of a plurality of second filter bags 16 connected in series, which are used to filter the flue gas. The second output end of the flue gas inlet pipe 7 is installed with a second air inlet valve 18 and is placed at the bottom of the second sealed shell 15. The second ash hopper 17 is arranged at the bottom of the second sealed shell 15, and the second ash discharge valve 19 is arranged at the bottom of the second ash hopper 17.

[0041] like Figure 1 and Figure 2 As shown, the main fan mechanism 2 includes a main fan 21, a chimney 22, a first reverse air suction duct 24, and an exhaust duct 23. One end of the main fan 21 is connected to the first sealed shell 11 and the second sealed shell 15 respectively after the first air outlet valve 81 and the second air outlet valve 82 are set in the exhaust duct 23. The other end of the main fan 21 is connected to the chimney 22 through the exhaust duct 23. The first reverse air suction valve 61 and the second reverse air suction valve 62 are set at one end of the first reverse air suction duct 24, and are connected to the first sealed shell 11 and the second sealed shell 15 respectively. The other end of the first reverse air suction duct 24 is connected to the other end of the main fan 21.

[0042] like Figure 1and Figure 2 As shown, the cyclone dust removal mechanism 4 includes a cyclone dust collector 41 and an ash conveying pipe 42, one end of the ash conveying pipe 42 is respectively connected to the bottom of the first ash hopper 12 and the second ash hopper 17, and the other end of the ash conveying pipe 42 is connected to the inlet of the cyclone dust collector 41.

[0043] like Figure 1 and Figure 2 As shown, the encryption chamber mechanism 5 includes an encryption chamber 51 , and the top of the encryption chamber 51 is connected to the bottom of the cyclone dust collector 41 .

[0044] like Figure 1 and Figure 2 As shown, the reverse suction mechanism 3 includes a reverse suction fan 31 and a second reverse suction duct 32. One end of the second reverse suction duct 32 is connected to the outlet of the cyclone dust collector 41, and the other end of the second reverse suction duct 32 is connected in series with the reverse suction fan 31 and then connected to the smoke inlet pipe 7.

[0045] The working principle of the utility model is as follows:

[0046] like Figure 1 and Figure 2 As shown, the present invention provides an industrial silicon dust removal, cleaning and ash conveying device, which is divided into a dust removal and filtering stage and a cleaning and ash conveying stage. When the system is in the dust removal and filtering stage, the dust-containing gas is sucked into the first filter bag 13 and the second filter bag 16 of each chamber from the flue gas inlet pipe 7, the first air inlet valve 14, the second air inlet valve 18, the first ash hopper 12 and the second ash hopper 17 through the main fan mechanism 2 arranged at the rear end of the negative pressure dust removal mechanism 1. The first filter bag 13 and the second filter bag 16 are in a bulging state, and the dust is blocked on the inner surface of the first filter bag 13 and the second filter bag 16. After the clean gas comes out from the outer surface of the first filter bag 13 and the second filter bag 16, it is discharged through the first air outlet valve 81, the second air outlet valve 82, the exhaust duct 23, the main fan 21 and the chimney 22, thereby realizing the flue gas purification process. At the same time, an environmental monitoring point can be set on the chimney 22 to monitor the dust emission in real time to ensure that the emission meets the standard. During the flue gas purification process, the first air inlet valve 14, the second air inlet valve 18, the first air outlet valve 81, and the second air outlet valve 82 are in an open state, and the first reverse air suction valve 61, the second reverse air suction valve 62, the first ash discharge valve 10, and the second ash discharge valve 19 are in a closed state.

[0047] After a period of dust removal and filtration, a large amount of dust is deposited on the inner surfaces of the first filter bag 13 and the second filter bag 16. At this time, the dust cleaning and ash conveying stage is entered. The dust cleaning and ash conveying adopt an offline mode. The first negative pressure dust removal component and the second negative pressure dust removal component are cleaned separately. When the first negative pressure dust removal component is cleaned, the first air inlet valve 14 and the first air outlet valve 81 are in a closed state, and the first reverse suction valve 61 and the first ash discharge valve 10 are in an open state. The clean hot flue gas at the rear end of the main fan 21 is sucked into the first reverse suction duct 24 through the negative pressure of the reverse suction fan 31. In the dust cleaning chamber, the flue gas is sucked from the outer surface of the first filter bag 13, and the first filter bag 13 is in a deflated state. The dust is separated from the filter bag and transported to the top cyclone dust collector 41 along the first filter bag 13, the first ash hopper 12 and the ash conveying pipe 42 under the action of continuous negative pressure. More than 90% of the dust is collected by the cyclone dust collector 41 and falls into the encryption bin 51 for encryption. At this point, the dust cleaning and ash conveying process of the first negative pressure dust removal component is completed, and at the same time, it jumps to other chambers to start dust cleaning and ash conveying. Repeat the above operation until the dust cleaning and ash conveying of all chambers are completed. Since the gas coming out of the cyclone dust collector 41 does not meet the ultra-low emission requirements, it is returned to the flue gas inlet pipe 7 through the reverse suction fan 31 and the second reverse suction pipe 32 for dust removal again.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. An industrial silicon dust removal, cleaning and ash conveying device, characterized in that: It includes a smoke inlet pipe, a negative pressure dust removal mechanism, a main fan mechanism, a reverse suction mechanism, a cyclone dust removal mechanism, and an encrypted bin mechanism; One end of the negative pressure dust removal mechanism is connected to one end of the smoke inlet pipe, and is used to receive the dust-containing smoke entering the smoke pipe and then perform dust removal; The upper end of the negative pressure dust removal mechanism is connected to the two ends of the main fan mechanism, so that when the negative pressure dust removal mechanism accumulates dust, the main fan mechanism can transport the purified flue gas to the negative pressure dust removal mechanism for dust removal and discharge the purified flue gas; The lower end of the negative pressure dust removal mechanism is connected to one end of the cyclone dust removal mechanism, so that when the negative pressure dust removal mechanism is cleaned, the reverse suction mechanism transports the cleaned dust-containing flue gas to the cyclone dust removal mechanism to collect dust; The encryption chamber mechanism is arranged at the bottom of the cyclone dust removal mechanism, and is used to receive the dust in the cyclone dust removal mechanism and encrypt it; One end of the reverse air suction mechanism is connected to the outlet of the cyclone dust removal mechanism, and the other end of the reverse air suction mechanism is connected to the flue gas inlet pipe, which is used to provide power when the main fan mechanism transports the purified flue gas to the negative pressure dust removal mechanism for cleaning after dust accumulation in the negative pressure dust removal mechanism.

2. The industrial silicon dust removal, cleaning and ash conveying device according to claim 1 is characterized in that: The negative pressure dust removal mechanism comprises a first negative pressure dust removal component and a second negative pressure dust removal component, and the first negative pressure dust removal component and the second negative pressure dust removal component are arranged in parallel.

3. The industrial silicon dust removal, cleaning and ash conveying device according to claim 2 is characterized in that: The first negative pressure dust removal component includes a first sealed shell, a first ash hopper, a first filter bag, a first air inlet valve, and a first ash discharge valve. A group of first filter bag groups is arranged in the first sealed shell. Each group of the first filter bag groups is composed of a plurality of first filter bags connected in series and is used to filter smoke. The first output end of the smoke inlet pipe is installed with a first air inlet valve and is placed at the bottom of the first sealed shell. The first ash hopper is arranged at the bottom of the first sealed shell, and the first ash discharge valve is arranged at the bottom of the first ash hopper.

4. The industrial silicon dust removal, cleaning and ash conveying device according to claim 3 is characterized in that: The second negative pressure dust removal assembly includes a second sealed shell, a second ash hopper, a second filter bag, a second air inlet valve, and a second ash discharge valve. A group of second filter bag groups is arranged in the second sealed shell. Each group of the second filter bag groups is composed of a number of second filter bags connected in series and is used to filter smoke. The second output end of the smoke inlet pipe is installed with a second air inlet valve and is placed at the bottom of the second sealed shell. The second ash hopper is arranged at the bottom of the second sealed shell, and the second ash discharge valve is arranged at the bottom of the second ash hopper.

5. The industrial silicon dust removal, cleaning and ash conveying device according to claim 4 is characterized in that: The main fan mechanism includes a main fan, a chimney, a first reverse air suction duct, and an exhaust duct. One end of the main fan is connected to the first sealed shell and the second sealed shell respectively after the first air outlet valve and the second air outlet valve are arranged in the exhaust duct. The other end of the main fan is connected to the chimney through the exhaust duct. The first reverse air suction valve and the second reverse air suction valve are arranged at one end of the first reverse air suction duct, and are connected to the first sealed shell and the second sealed shell respectively after the first reverse air suction valve and the second reverse air suction valve are arranged. The other end of the first reverse air suction duct is connected to the other end of the main fan.

6. The industrial silicon dust removal, cleaning and ash conveying device according to claim 5 is characterized in that: The cyclone dust removal mechanism includes a cyclone dust collector and an ash conveying pipeline, one end of the ash conveying pipeline is respectively connected to the bottom of the first ash hopper and the second ash hopper, and the other end of the ash conveying pipeline is connected to the inlet of the cyclone dust collector.

7. The industrial silicon dust removal, cleaning and ash conveying device according to claim 6 is characterized in that: The encryption bin mechanism comprises an encryption bin, and the top of the encryption bin is connected to the bottom of the cyclone dust collector.

8. The industrial silicon dust removal, cleaning and ash conveying device according to claim 7 is characterized in that: The reverse air suction mechanism includes a reverse air suction fan and a second reverse air suction duct, one end of the second reverse air suction duct is connected to the outlet of the cyclone dust collector, and the other end of the second reverse air suction duct is connected in series with the reverse air suction fan and then connected to the smoke inlet pipe.

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