Special dust remover for dry shock cooling arsenic collection

Abstract

The utility model discloses a special dust remover for dry quenching arsenic collection, which comprises a flue gas inlet for leading in flue gas and a flue gas outlet for leading out the flue gas, an ash bucket, a filter bag group and a flow channel are arranged on a flue gas circulation path, the filter bag group is positioned above the ash bucket, the bottom of the ash bucket is connected with an ash conveying device, and the ash conveying device is connected with the flow channel. The filter bag group is connected with an ash removal device; the utility model has the beneficial effects that the smoke flows along the ash hopper, the filter bag group and the runner, so that the dust in the smoke is adsorbed in the ash hopper, the ash cleaning device can be periodically started to enable the dust on the surface of the filter bag group to fall into the ash hopper, and the ash in the ash hopper can be periodically sent out by using the ash sending device, thereby improving the anti-blocking capability of the equipment and improving the safety of the equipment. The device can adapt to complex and severe working conditions, stable operation of the device is ensured, meanwhile, the maintenance cost of the device is reduced, and pollution to the environment is reduced.

Description

Technical Field

[0001] This utility model relates to the field of environmental protection equipment, and in particular to a special dust collector for dry rapid cooling arsenic recovery. Background Technology

[0002] In industries such as non-ferrous metal smelting, the flue gas generated by equipment such as fluidized bed furnaces and smelting furnaces contains a large amount of arsenic dust. If not effectively treated, it will cause serious environmental pollution and pose a threat to human health. Traditional arsenic collectors have many problems when dealing with such arsenic-containing flue gas. For example, they are not very adaptable to arsenic-containing dust that is sticky and hygroscopic, often leading to condensation and blockage of filter bags, affecting arsenic collection efficiency and equipment stability. When dealing with flue gas with large temperature fluctuations and complex composition, the equipment's corrosion resistance and high-temperature resistance are insufficient. The dust removal system of some equipment is not flexible and efficient enough to meet the requirements of long-term stable operation.

[0003] The patent with publication number "CN110280125A" discloses "a dry purification method for smelting flue gas containing arsenic and SO3". Although it achieves the simultaneous capture of multiple pollutants such as arsenic and SO3, it does not have a filter bag cleaning device, which makes the equipment easy to get clogged and affects the arsenic collection efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a dry quenching dust collector for arsenic recovery that can operate stably for a long time in harsh environments and has both high-efficiency dust removal and anti-clogging performance.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A dry quenching dust collector for arsenic recovery includes a flue gas inlet for introducing flue gas and a flue gas outlet for discharging flue gas. The flue gas flow path is also provided with an ash hopper, a filter bag assembly, and a flow channel. The filter bag assembly is located above the ash hopper, the bottom of the ash hopper is connected to an ash feeding device, and the filter bag assembly is connected to a dust cleaning device.

[0007] Preferably, a lifting device is provided above the ash hopper fixing frame.

[0008] Preferably, the filter bag groups and ash hoppers are one-to-one and there are multiple filter bag groups, with each filter bag group located above its corresponding ash hopper.

[0009] Preferably, the dust removal device includes a gas storage tank, a gas distribution cylinder for diverting the gas in the gas storage tank, and a backflush pipe for blowing the gas in the gas distribution cylinder to the filter bag assembly.

[0010] Preferably, a first heating device is provided on the outside of the gas storage tank.

[0011] Preferably, a second heating device is provided on the outside of the ash hopper, a vibrating device for striking the ash hopper is provided on the outside of the ash hopper, a level gauge for detecting the amount of ash inside the ash hopper is also provided inside the ash hopper, and a manhole is also provided on the ash hopper.

[0012] Preferably, an inlet sampler and an inlet static pressure measuring device are provided at the flue gas inlet, and an outlet sampler and an outlet static pressure measuring device are provided at the flue gas outlet.

[0013] Preferably, the filter bag assembly consists of multiple filter bags, and each filter bag is provided with a bag cage.

[0014] Preferably, the device also includes a rainproof canopy that seals the outside of the dust collector.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. By allowing flue gas to flow along the ash hopper, filter bag assembly, and flow channel, dust in the flue gas is adsorbed into the ash hopper. At the same time, the dust removal device can be activated periodically to allow dust on the surface of the filter bag assembly to fall into the ash hopper. The ash in the ash hopper can be periodically removed using the ash conveying device, thereby improving the equipment's anti-clogging capability, enabling it to adapt to complex and harsh working conditions, ensuring stable operation of the equipment, reducing its maintenance costs, and minimizing environmental pollution.

[0017] 2. Heating devices are installed on the outside of the ash hopper and gas storage tank to ensure that there is no condensation or sticking inside the equipment when operating in low temperature environment or when the flue gas temperature is low, thus maintaining its normal operation.

[0018] 3. Samplers and static pressure measuring instruments are installed at the flue gas inlet and outlet to obtain the concentration of flue gas entering and exiting the dust collector and the filter bag resistance, so as to monitor the working condition of the filter bags in real time and facilitate cleaning.

[0019] 4. The dust collector is installed in an open-air environment and sealed with a rainproof canopy to effectively prevent external factors such as rain and dust from interfering with the operation of the equipment. Attached Figure Description

[0020] Figure 1 This is the front view of the present invention;

[0021] Figure 2 This is the front view of the present invention (the flue gas inlet and flue gas outlet are hidden).

[0022] Figure 3 for Figure 1 Sectional view A-A;

[0023] Figure 4 for Figure 1 B-B sectional view.

[0024] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Detailed Implementation

[0025] The present invention will now be further described with reference to the accompanying drawings. Example

[0026] like Figure 1 — Figure 4 As shown, a dry quenching dust collector for arsenic recovery includes a flue gas inlet 2-3 for introducing flue gas and a flue gas outlet 2-4 for discharging flue gas. The flue gas flow path also includes ash hoppers 3-5, filter bag groups 4-2, and flow channels 4-9. Filter bag groups 4-2 and ash hoppers 3-5 are arranged in a one-to-one correspondence, with multiple ash hoppers 3-5. Each filter bag group 4-2 is located above its corresponding ash hopper 3-5. Multiple ash hoppers 3-5 are connected in series, and the ash hoppers 3-5 and their corresponding filter bag groups 4-2 are also connected in series. Flue gas enters multiple ash hoppers 3-5 along the flue gas inlet 2-3, and then enters the filter bag groups 4-2 corresponding to each ash hopper 3-5, before entering the flow channel 4-9. The flow channel 4-9 has only one location and multiple inlets (the same number as the filter bag groups 4-2). The end of the flow channel 4-9 is the flue gas outlet 2-4.

[0027] The ash hopper 3-5 and its shell are also equipped with a perforated plate 4-1. The perforated plate 4-1 is made of 2205 stainless steel with a wall thickness of 10mm to ensure structural strength and corrosion resistance. The parts above the perforated plate 4-1 that come into contact with the flue gas use 4mm SMO254 stainless steel. The parts below the perforated plate 4-1 that come into contact with the flue gas in the arsenic collector shell and the ash hopper use a composite structure of 4mm Q235 + 2mm SMO254 or 2.5mm SMO254, which ensures the equipment's tolerance to flue gas while also taking cost-effectiveness into account.

[0028] An electric inlet disc valve 4-3 is installed at the inlet of ash hopper 3-5 to control the flue gas velocity to no more than 12 m / s. A pneumatic lift valve is installed at the outlet, with a ventilation area larger than the flue area. A reliable sealing structure is configured at the top cover to further improve the operating efficiency and sealing performance of the equipment. The electric inlet disc valve 4-3 is 2500*500mm in size, with both the valve plate and the housing made of 316L stainless steel. A 400*400mm quick-opening inspection hole 3-1 is added at the corresponding position. The flue gas inlet and outlet are connected by flanges to ensure the sealing and reliability of the connection. Regarding the piping, the pipes from the quench tower to the flue gas inlet 2-3 and the flue gas outlet 2-4 are both made of 316L stainless steel, with pipe diameters of φ2220×12 and φ2020×12 respectively, ensuring the corrosion resistance and stability of the pipes during flue gas transportation.

[0029] The bottom of the ash hopper 3-5 is connected to an ash feeding device via a low-temperature rectangular non-metallic expansion joint 3-7. The low-temperature rectangular non-metallic expansion joint 3-7 is generally composed of multiple layers of non-metallic materials such as rubber and fiber, with internal reinforcing ribs and a frame structure to enhance its pressure-bearing capacity and stability. It has connecting flanges at both ends. Installed at the outlet of the ash hopper or on the pipeline connected to the ash hopper outlet, it compensates for the thermal expansion and contraction deformation of the ash hopper caused by temperature changes, preventing damage to the pipeline and ash hopper due to thermal stress. During installation, ensure the expansion joint is installed in the correct direction and that the connections at both ends are secure and well-sealed. The ash feeding device includes an overflow screw and a scraper conveyor: the overflow screw generally consists of a screw shaft, screw blades, a housing, and a drive unit, while the scraper conveyor includes a scraper chain, sprockets, a housing, and a drive unit. The overflow screw is typically installed below the bottom outlet of ash hopper 3-5 and connected to the outlet of ash hopper 3-5. Its outer shell is sealed to the outlet of ash hopper 3-5 via flanges or other connection methods. The feed inlet of the scraper conveyor is connected to the discharge outlet of the overflow screw, or directly to the outlet of ash hopper 3-5. During installation, the horizontal and vertical alignment of the equipment must be ensured to guarantee smooth ash conveying. The carbon steel parts and lining are fully welded, the stainless steel parts undergo penetrant testing, the carbon steel parts are leak-tested using kerosene-lime, and the lining welds are pressure-tested for leaks to ensure the equipment's sealing and welding quality and prevent flue gas leakage.

[0030] like Figure 2 and Figure 4As shown, the filter bag assembly 4-2 consists of multiple filter bags, each equipped with a bag cage 4-2-1. The filter bag assembly 4-2 is connected to a dust removal device. This device includes an air storage tank 3-2, a gas distribution cylinder 4-4-2 that diverts the gas within the air storage tank 3-2, and a backflush pipe 4-4-1 that blows the gas from the gas distribution cylinder 4-4-2 to the filter bag assembly 4-2. The backflush pipe 4-4-1 is designed for quick disassembly and assembly, preventing detachment and facilitating equipment maintenance and repair. The gas distribution cylinder 4-4-2 is manufactured according to pressure vessel standards and equipped with insulation to ensure safe and stable operation of the equipment. The air storage tank 3-2 provides high-pressure air. When the filter bags are clogged or have excessive dust accumulation, the backflush pipe 4-4-1 cleans the bags, causing the adhering dust to fall into the dust hopper 3-5.

[0031] The filter bag's frame is made of 2205 stainless steel, enhancing the stability and corrosion resistance of the internal support structure. The filter bag measures φ160×4500 and is treated with PTFE impregnation (PTFE emulsion impregnation provides water and oil repellency), effectively improving the filter bag's ability to filter arsenic-containing dust and its anti-clogging capabilities, while also enhancing its corrosion resistance and moisture resistance.

[0032] The 4-2-1 filter cage has a specification of φ155×4450 and is made of 2205 stainless steel. It fits tightly with the filter bag, ensuring the stability and reliability of the filtration process.

[0033] The dust removal method employs timed pulse jet cleaning, with nozzles working in conjunction with venturi tubes installed on the side of the filter bags. Compressed air ejected from the nozzles creates a high-speed airflow within the venturi tubes, generating negative pressure and inducing a large amount of secondary air into the filter bags, enhancing the dust removal effect. This control method is adjustable. Each chamber and each row of filter bags is equipped with a separate pulse jet branch pipe and pulse jet system (the branch pipe is fixed above each row of filter bags by a bracket). The back-flushing process (using the impact and vibration of reverse airflow to deform and shake the filter bags, thereby causing the dust layer to fall off) allows for selection of the housing and free choice between 1 and N#, ensuring targeted and efficient dust removal, effectively preventing filter bag clogging, and maintaining stable dust collection efficiency.

[0034] In this embodiment, the ash hopper 3-5, filter bag group 4-2, flow channel 4-9, flue gas inlet 2-3, and outlet 2-4 are all set as two rows that are not connected to each other. A clamping plate 4-7 is set between the two rows of equipment. The clamping plate 4-7 adopts a heat preservation structure to reduce heat loss.

[0035] A lifting device 2-2 is installed above the fixed frame of the ash hopper 3-5. In this embodiment, the lifting device 2-2 is a 3t electric hoist, used for installing the top cover 4-8 or removing and installing filter bags.

[0036] A first heating device 3-2-1, which is electrically heated, is installed on the outside of the gas storage tank 3-2. A second heating device 4-5, which is also electrically heated, is installed on the outside of the ash hopper 3-5. The heating temperature of the second heating device 4-5 is 140℃, and a composite silicate felt and 0.8mm color steel tile (200mm thick) are used as the insulation layer. The installation of two heating devices ensures that there is no condensation or adhesion inside the equipment when the temperature is low or the flue gas temperature is low, thus maintaining the normal operation of the equipment.

[0037] A vibrating device 3-6 for striking the ash hopper 3-5 is provided on the outside of the ash hopper 3-5. The vibrating device 3-6 includes a vibrating motor, which is installed on the outside of the ash hopper 3-5 and connected to the inside of the ash hopper 3-5 through a vibrating rod. The vibrating rod can be fixed to the wall panel of the ash hopper.

[0038] The ash hopper 3-5 is also equipped with a level gauge 4-6 to detect the amount of ash inside. The level gauge 4-6 is a rotary resistance level gauge, consisting of a sensor and a controller. The sensor includes measuring blades, a shaft, and bearings. When material comes into contact with the measuring blades, the blades' rotation is obstructed, resulting in a signal change. The level gauge 4-6 is installed on the side wall of the ash hopper 3-5. The installation height is determined based on the size of the ash hopper and the required material level, generally located in the upper-middle part of the ash hopper 3-5. During installation, it is essential to ensure that the measuring blades of the sensor can rotate freely and that there is a good seal with the ash hopper wall to prevent dust from entering and affecting measurement accuracy.

[0039] A manhole door 3-4 is also provided on the ash hopper 3-5. The manhole door 3-4 is a rectangular or circular opening of a certain size in the hopper wall, surrounded by a welded door frame. The door body is connected to the door frame by hinges or other connection methods. The door body is generally made of steel plate, and sealing strips or other sealing materials are installed to ensure airtightness. It is installed on the upper part or side of the ash hopper, facilitating personnel access to the hopper for inspection, cleaning, and maintenance. During installation, it is essential to ensure a secure connection between the door body and the door frame, and a good seal to prevent air or dust leakage.

[0040] An inlet sampler 2-3-1 and an inlet static pressure measuring device 2-3-2 are installed at the flue gas inlet (2-3), and an outlet sampler 2-4-1 and an outlet static pressure measuring device 2-4-2 are installed at the flue gas outlet (2-4). Both the inlet sampler 2-3-1 and the outlet sampler 2-4-1 include a sampling head, filter membrane clamp, flow meter, and suction pump to obtain the concentration of flue dust entering and exiting the dust collector. When the dust collector is operating normally, the inlet static pressure measuring device 2-3-2 and the outlet static pressure measuring device 2-4-2 can read the static pressure values ​​before and after the filter bag; the difference between the two values ​​is the filter bag resistance.

[0041] This device also includes a rainproof canopy 2-1 that seals the outside of the dust collector. During use, the entire device is installed on a 10m platform (the ash hopper 3-5 is installed on the 10m platform). A 0.75mm color steel plate tight-fitting sealing system is installed at the bottom. The rainproof canopy 2-1 works in conjunction with the bottom color steel plate to form a seal, effectively preventing interference from external factors such as rain and dust on the equipment's operation.

[0042] This device also includes climbing ladders 2-5 to facilitate workers' climbing and routine maintenance of the equipment.

[0043] The dust collector in this embodiment is arranged in an open-air environment and adopts an independent dual-unit structure with two inlets and two outlets. The model is 8000-2x14 and the flue gas handling capacity is 190,000 m³ / h.

[0044] The power supply for this device is 380V / 220V - 50Hz (three-phase four-wire system). All equipment, valves, instruments, and automatic control items involved in the entire bag filter enclosure are connected to the centralized control system. A DCS cabinet is set up in the central control room, and a separate operator station is connected to the centralized control cabinet via a communication protocol to connect related equipment such as relay fans, spray pumps, and baling machines to the centralized control cabinet, realizing centralized control and data transmission.

[0045] The dust collector control cabinet features functions such as voltage display, arsenic collector inlet temperature display, dust cleaning operation status display, main control room start-up, and fault display. It also provides an operation mode selection function, facilitating equipment monitoring and management by operators. Furthermore, the electrical equipment and control system can still operate normally when the power supply voltage varies within ±10%, ensuring the stability of equipment operation.

[0046] During the use of this device, the foundation construction and installation are carried out first according to the site civil engineering drawings. During installation, the requirements of the equipment general drawing and relevant installation instructions are strictly followed to ensure the accurate installation position and secure connection of each component. For example, the Q235A components such as the columns, ladders, and outer shell are assembled and welded according to design requirements to ensure the stability of the overall equipment structure; the tube sheet, filter bags, and bag cages are installed sequentially in their corresponding positions, ensuring a tight fit between the filter bags and bag cages and a sealed connection between the tube sheet and the outer shell.

[0047] After equipment installation, commissioning is carried out. First, the electrical system is checked to ensure a normal power supply, correct connections between the DCS system and all equipment, valves, and instruments, and that all control functions, such as dust removal control, temperature display, and fault alarms, are functioning correctly. Next, the heating system is commissioned, with different temperature conditions set to check the operation of the heating device and temperature control box, ensuring a stable heating temperature of 140℃ and good heat preservation. The compressed air supply system is then pressure-tested and its flow rate adjusted to ensure the compressed air pressure is within the range of 0.6-0.8 MPa and the normal compressed air consumption meets the requirement of 2.5-3.5 m³ / min, providing a stable air source for pulse jet cleaning.

[0048] Equipment Operation and Maintenance: During equipment operation, parameters such as flue gas flow rate, temperature, and dust concentration are monitored in real time through the DCS system. The equipment operates stably when the inlet flue gas temperature is within the range of 140-170℃. If the temperature exceeds this range, the DCS system will issue an alarm, and operators can adjust process parameters or check the heating and cooling systems for proper functioning. Timed or pressure-based dust removal operations are performed according to the set dust removal procedure. Based on actual operating conditions, such as dust concentration and filter bag resistance, operators can flexibly adjust the dust removal cycle and pressure setpoint on the control panel.

[0049] When the filter bag resistance reaches a certain value, the automatic dust removal program is activated. Compressed air is injected into the filter bag via an electromagnetic pulse valve, causing the filter bag to vibrate and shake off the adhering arsenic dust. Simultaneously, the wear and clogging of the filter bags are regularly checked. Damaged or severely clogged filter bags are replaced using an electric hoist to open the top cover. Regular inspections of all equipment components are conducted, including valve sealing performance, pipe connections, and the smoothness of ash discharge from the ash hopper. For vulnerable parts, such as electromagnetic pulse valves and level gauges, timely replacement is performed according to the spare parts list to ensure continuous and stable equipment operation. Through analysis of equipment operating data and organization of maintenance records, operating parameters and maintenance plans are continuously optimized to improve equipment lifespan and operating efficiency.

[0050] This device can produce the following positive effects during use:

[0051] 1. High-efficiency dust removal performance: Through reasonable structural design and advanced filter bag material, the recovery and purification efficiency of arsenic-containing dust is up to 99.8%, and the dust concentration at the outlet is ≤10mg / Nm³, which effectively reduces the pollution of arsenic dust to the environment.

[0052] 2. Good adaptability: It can adapt to harsh working conditions such as inlet flue gas temperature of 140-170℃, dust concentration of about 50g / m³, complex flue gas composition (containing a large amount of SO2, SO3, As, etc.) and the stickiness and moisture absorption of flue gas dust, ensuring long-term stable operation of the equipment.

[0053] 3. Flexible dust removal control: The pulse jet cleaning method is timed or pressured and adjustable. Combined with separate jet branch pipes and jet system, it can accurately clean dust according to the actual situation, prevent filter bag clogging, and maintain stable dust removal efficiency.

[0054] 4. Comprehensive protection and monitoring system: The equipment's rainproof, windproof, and freeze-proof design, as well as heating and insulation measures, ensure normal operation under different climatic conditions; the stability of the electrical system and the comprehensiveness of instrument monitoring facilitate operators to monitor the equipment status in real time and promptly identify and resolve problems.

[0055] 5. Reliable sealing and quality assurance: Through special material selection, welding process testing and sealing structure design, such as full welding of carbon steel and inner lining, stainless steel flaw detection, and gas chamber sealing, the leakage of flue gas is effectively prevented, and the overall performance and safety of the equipment are improved.

[0056] The above embodiments are not intended to limit the shape, material, structure, etc. of this utility model in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model shall fall within the protection scope of this utility model.

[0057] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of this utility model and to simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0058] If the terms "first" or "second" are used in this document to define the components, those skilled in the art should know that the use of "first" or "second" is merely for the convenience of describing this utility model and simplifying the description, and unless otherwise stated, the above terms have no special meaning.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A dry quenching dust collector for arsenic removal, comprising a flue gas inlet (2-3) for introducing flue gas and a flue gas outlet (2-4) for discharging flue gas, characterized in that: The flow path of the flue gas is further provided with an ash bucket (3-5), a filter bag group (4-2) and a flow channel (4-9), the filter bag group (4-2) is located above the ash bucket (3-5), the bottom of the ash bucket (3-5) is connected with an ash conveying device, and the filter bag group (4-2) is connected with an ash cleaning device.

2. A dry quenching dust collector for collecting arsenic according to claim 1, characterized in that, A hoisting device (2-2) is arranged above the ash bucket (3-5) fixed frame.

3. A dry quenching dust collector for collecting arsenic according to claim 1, characterized in that, The filter bag group (4-2) and the ash bucket (3-5) are one-to-one corresponding and each is provided with multiple, and each filter bag group (4-2) is located above the corresponding ash bucket (3-5).

4. The dry quenching dedicated dust collector for removing arsenic according to claim 1, characterized in that, The ash cleaning device comprises a gas storage tank (3-2), a gas distribution cylinder (4-4-2) for distributing the gas in the gas storage tank (3-2), and a back blowing pipe (4-4-1) for blowing the gas in the gas distribution cylinder (4-4-2) to the filter bag group (4-2).

5. A dry quenching dust collector for collecting arsenic according to claim 4, characterized in that, A first heating device (3-2-1) is arranged outside the gas storage tank (3-2).

6. A dry quenching dust collector for collecting arsenic according to claim 1, wherein A second heating device (4-5) is arranged outside the ash bucket (3-5), a vibrating device (3-6) for knocking the ash bucket (3-5) is arranged outside the ash bucket (3-5), a material level meter (4-6) for detecting the internal ash amount of the ash bucket (3-5) is further arranged in the ash bucket (3-5), and a manhole door (3-4) is further arranged on the ash bucket (3-5).

7. A dry quenching dust collector for collecting arsenic according to claim 1, wherein An inlet sampler (2-3-1) and an inlet static pressure measurer (2-3-2) are arranged at the flue gas inlet (2-3), and an outlet sampler (2-4-1) and an outlet static pressure measurer (2-4-2) are arranged at the flue gas outlet (2-4).

8. A dry quenching dust collector for collecting arsenic according to claim 1, characterized in that, The filter bag group (4-2) is composed of a plurality of filter bags, and a bag cage (4-2-1) is arranged on the filter bag.

9. The dry quenching dedicated dust collector for removing arsenic according to claim 1, characterized in that, A rainproof shed (2-1) for sealing the outside of the dust collector is further included.

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