Dust removal and purification device for smelting tail gas

Abstract

The invention provides a dust removal and purification device for smelting tail gas, and aims to efficiently purify tail gas pollutants in the smelting process. The device comprises a primary filter tower, a high-efficiency filter tower, a vibration ash removal mechanism, a water tank absorption system and an automatic control system. Tail gas firstly enters the primary filtering tower, and large-particle pollutants are intercepted through multiple layers of filtering plates; and then the fine particles enter an efficient filtering tower to be deeply filtered. Protruding blocks are arranged on the surface of the filter plate, and the vibration deashing mechanism drives the vibration columns to impact the protruding blocks to achieve automatic deashing. After entering the water tank, the tail gas is in full contact with absorption liquid to neutralize acid gas and is finally discharged through a discharge port. The device is provided with an automatic control system, so that the tail gas treatment effect can be monitored in real time and operating parameters can be optimized. Compared with traditional equipment, the tail gas purification efficiency is improved, comprehensive treatment of acid gas and particulate matter is achieved, energy consumption is reduced, and it is ensured that tail gas reaches the standard to be discharged.

Description

Technical Field

[0001] The invention relates to the fields of environmental protection and industrial dust removal, and more specifically to a smelting tail gas dust removal and purification device. Background Art

[0002] The metallurgical industry will emit a large amount of tail gas during the production process. These tail gases contain harmful components such as particulate matter, heavy metal dust, acidic gases (such as SO2, NOx), dioxins and volatile organic compounds. Direct discharge of these waste gases without treatment will cause serious air pollution, affecting the ecological environment and human health. In addition, with the increasingly stringent environmental protection regulations, the tail gas emission standards for enterprises are also constantly improving. Therefore, it has become an urgent need for the smelting industry to achieve efficient, energy-saving and environmentally friendly tail gas treatment processes.

[0003] Traditional exhaust gas treatment equipment such as bag filters and electrostatic precipitators are effective in treating large dust particles, but have certain limitations in filtering fine particles and acidic gases. In addition, the cleaning systems of these devices are often prone to dust accumulation, resulting in reduced filtration efficiency, increased system maintenance costs and operating energy consumption.

[0004] In modern smelting production processes, the emission of acidic gases has also attracted widespread attention. Once these gases are discharged into the atmosphere, they will react with water vapor to form acid rain, corrode buildings, and endanger the survival of animals and plants. Therefore, on the basis of exhaust dust removal, the absorption and purification of acidic gases is an important direction of modern exhaust gas treatment.

[0005] In order to meet the multiple needs of industrial tail gas treatment, some devices combining wet absorption and multi-stage filtration technology have appeared on the market, but there are still the following shortcomings:

[0006] (1) Incomplete cleaning: The existing equipment’s cleaning method is mostly a single pulse jet, which cannot completely remove the dust accumulated on the filter plate, resulting in reduced long-term operating efficiency of the equipment.

[0007] (2) Incomplete acid gas treatment: Some tail gas treatment systems have limited absorption efficiency for gases such as SO2 and NOx, and require additional equipment and absorption media to complete secondary treatment.

[0008] (3) High operating and maintenance costs: Traditional equipment requires frequent maintenance and a large amount of consumables, which increases the operating costs of the enterprise.

[0009] Therefore, a new type of smelting tail gas dust removal and purification device is proposed to achieve multi-stage filtration and acid gas absorption and purification to ensure the high efficiency and environmental protection of tail gas treatment. Summary of the invention

[0010] In order to solve the above problems, the present invention provides a high-efficiency and energy-saving smelting tail gas dust removal and purification device, which has multi-stage filtration, acid gas absorption and automatic dust cleaning functions, effectively purifies the tail gas generated during the smelting process and reduces environmental pollution.

[0011] The present invention provides the following technical solution, which mainly includes:

[0012] The smelting tail gas dust removal and purification device comprises a first filter tower, a second filter tower, a water tank, a pulse air flow blowing device and a vibration mechanism;

[0013] The first filter tower is connected to the exhaust gas source through an air intake pipe, and the first filter tower and the second filter tower are connected through a gas transmission pipe. The second filter tower is equipped with an exhaust pipe connected to the exhaust port for discharging the treated exhaust gas. The first filter tower and the second filter tower are respectively provided with a first filter plate and a second filter plate, and the filter plates are provided with bumps on their surfaces so that the vibration mechanism can knock and clean the dust.

[0014] The water tank is used to absorb the acidic gas in the exhaust gas and discharge the treated exhaust gas through the exhaust port.

[0015] The pulse air flow spraying device is connected to the filter tower through a circulation pipeline and is connected to a collection box for collecting dust.

[0016] The vibration mechanism includes a rotating sleeve, a fixed frame, blades, a vibration column and a double helical slide rail. The blades are installed on the rotating sleeve. When the pulse airflow is sprayed, the blades drive the rotating sleeve to rotate, thereby driving the vibration column to reciprocate along the double helical slide rail and hit the bumps on the filter plate to achieve dust cleaning.

[0017] It can be seen from the above technical solution that compared with the prior art, the present invention has the following beneficial effects:

[0018] (1) High-efficiency filtration: Through a multi-stage filtration system, the smelting tail gas can be deeply purified and particulate matter can be effectively removed.

[0019] (2) Automatic dust cleaning: The dust cleaning method combines pulse airflow spraying and vibration mechanism to ensure the cleanliness of the filter plate and the long-term efficient operation of the equipment.

[0020] (3) Compact structure: The equipment takes up little space and is suitable for exhaust gas treatment needs of various smelting workshops.

[0021] (4) Easy to maintain: The filter plate and vibration mechanism are reasonably designed, which is convenient for disassembly and cleaning, reducing the maintenance cost of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0024] Figure 2 It is a schematic diagram of the three-dimensional structure of the rear side of the present invention.

[0025] Figure 3 It is a schematic diagram of the structure inside the filtering mechanism of the present invention.

[0026] Figure 4 It is an enlarged view of point A of the present invention.

[0027] Figure 5 It is a schematic diagram of the three-dimensional structure of the vibration mechanism of the present invention.

[0028] Figure 6 It is a structural cross-sectional view of the vibration mechanism of the present invention.

[0029] Description of the drawings: 1-first filter tower, 101-air inlet pipe, 102-gas transmission pipe, 103-first filter plate, 2-second filter tower, 201-air outlet pipe, 202-second filter plate, 2021-bump, 3-water tank, 301-discharge port, 4-pulse airflow blowing device, 401-circulation pipe, 402-collection box, 5-rotating sleeve, 501-fixed frame, 502-blade, 503-vibration column, 504-double spiral slide rail. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] like Figures 1 to 6 The present invention proposes a smelting tail gas dust removal and purification device, comprising a first filter tower 1, a second filter tower 2, a water tank 3, a pulse airflow blowing device 4 and a vibration mechanism 5, characterized in that:

[0032] The first filter tower 1 is connected to the second filter tower 2 via a gas pipeline 102, and the first filter tower 1 is provided with an air intake pipeline 101 for introducing exhaust gas;

[0033] The first filter tower 1 and the second filter tower 2 are respectively provided with a first filter plate 103 and a second filter plate 202, and both filter plates are provided with a protrusion 2021 for dust cleaning vibration;

[0034] The water tank 3 is connected to the second filter tower 2, and a discharge port 301 is provided on the water tank 3 for discharging the treated gas;

[0035] The pulse airflow spraying device 4 is connected to the filter tower through a circulation pipeline 401 and is connected to a collection box 402 for collecting dust during cleaning;

[0036] The vibration mechanism 5 includes a rotating sleeve 5, a fixed frame 501, blades 502, a vibration column 503 and a double spiral slide rail 504. The blades 502 are installed on the rotating sleeve 5. When the pulse airflow blowing device 4 sprays, it drives the rotating sleeve 5 to rotate, and then drives the vibration column 503 to reciprocate along the double spiral slide rail 504 to hit the protrusion 2021 to achieve vibration cleaning.

[0037] Preferably, the first filter tower 1 is used for primary filtration, and larger dust particles are removed through the first filter plate 103 .

[0038] Preferably, the second filter tower 2 is used for high-efficiency filtration, and fine particles are further removed through the second filter plate 202 .

[0039] Preferably, the protrusions 2021 are evenly distributed on the surfaces of the first filter plate 103 and the second filter plate 202 , and are used for colliding with the vibration column 503 .

[0040] Preferably, the vibration column 503 slides along the double-helical slide rail 504 to achieve multi-angle impact on the protrusion 2021 on the surface of the filter plate.

[0041] Preferably, the pulse airflow spraying device 4 sprays airflow periodically and guides the airflow to the surface of the filter plate through the circulation pipe 401 for cleaning.

[0042] Preferably, the collection box 402 is used to collect dust generated during the pulse spraying and vibration cleaning process.

[0043] Preferably, the air inlet pipe 101 and the air outlet pipe 201 are respectively arranged at the top and the bottom of the first filter tower 1 and the second filter tower 2 for smooth circulation of the exhaust gas.

[0044] Preferably, the blades 502 are used to drive the rotating sleeve 5 to rotate when the pulse airflow blowing device 4 sprays air, so that the vibration column 503 performs reciprocating motion.

[0045] Preferably, the water in the water tank 3 is used to absorb the acidic gas in the tail gas, and the treated tail gas is discharged through the discharge port 301 .

[0046] Embodiment 1:

[0047] Workflow and implementation of smelting tail gas dust removal and purification device

[0048] This embodiment introduces the specific application process of the smelting tail gas dust removal and purification device and the coordinated work of various components to ensure that the dust particles and acid gases in the tail gas are efficiently filtered and purified.

[0049] 1. Primary filtration process

[0050] The exhaust gas first enters the first filter tower 1 through the air intake pipe 101. Large dust particles in the exhaust gas are intercepted by the multi-layer first filter plate 103. A certain gap is set between each filter plate to avoid particle accumulation and blockage. As the exhaust gas flows in the filter plate, the dust gradually settles on the plate surface. The filter plate is designed with a bump 2021 to facilitate the cleaning of the vibration mechanism.

[0051] 2. Efficient filtration process

[0052] The exhaust gas after preliminary filtration enters the second filter tower 2 through the gas pipeline 102. The second filter plate 202 in the second filter tower further intercepts tiny particles. Through the cooperation of the vibration mechanism, the tiny particles attached to the surface of the filter plate can be removed in time to ensure a stable filtering effect.

[0053] 3. Vibration and cleaning mechanism

[0054] The rotating sleeve 5 of the vibration mechanism is installed in the fixed frame 501, and the connected blades 502 drive the vibration column 503 to reciprocate along the double spiral slide rail 504. When the pulse airflow spraying device 4 is started, the spraying airflow drives the blades 502 to rotate through the circulation pipe 401. The rotation of the blades causes the vibration column to slide up and down, hit the bumps 2021 on the filter plate, and shake the dust accumulated on the plate surface to the collection box 402. This design ensures a thorough cleaning process and reduces the downtime and maintenance time of the equipment.

[0055] 4. Water tank absorbs acidic gas

[0056] The tail gas after multi-stage filtration enters the water tank 3. The acidic gases in the tail gas, such as (SO2, NOx), come into contact with the absorption liquid in the water tank and undergo a chemical reaction to generate harmless sulfate or nitrate solution, thereby purifying the acidic gas. A discharge port 301 is provided at the top of the water tank to discharge the treated tail gas to ensure compliance with environmental emission standards.

[0057] 5. Emissions and exhaust gas circulation

[0058] The treated purified gas is discharged into the atmosphere from the discharge port 301. The device is also equipped with a circulation system, which can collect the collected particles and by-products generated by the reaction in the collection box 402 for subsequent treatment and reuse.

[0059] Embodiment 2:

[0060] Device performance testing and effect verification

[0061] 1. Test conditions

[0062] In order to verify the performance of the device, a simulated exhaust gas treatment test was carried out in a laboratory environment. The main components of the simulated exhaust gas include SO2, NOx and industrial dust, and the initial concentrations are as follows:

[0063] SO2: 500ppm

[0064] NOx: 300ppm

[0065] Particles (PM2.5): 120 μg / m 3

[0066] 2. Testing process

[0067] (1) The simulated exhaust gas is introduced into the first filter tower 1 through the intake pipe 101 for preliminary filtration of particulate matter.

[0068] (2) After entering the second filter tower 2, the pulse airflow blowing device 4 is started at a fixed time, and cooperates with the vibration column 503 to clean the filter plate.

[0069] (3) Finally, the exhaust gas enters the water tank 3, where SO2 and NOx are fully absorbed and converted, and the exhaust gas enters the atmosphere through the exhaust port 301.

[0070] 3. Test results

[0071] After testing, the processing efficiency of the device is as follows:

[0072] SO2 removal rate: 98.5%

[0073] NOx removal rate: 97.3%

[0074] Particle removal rate (PM2.5): 99.1%

[0075] 4. Performance Analysis

[0076] The device has shown excellent results in the removal of particulate matter and acid gases. The addition of a vibration cleaning mechanism significantly reduces the risk of equipment blockage and extends the operating cycle. The design of the water tank not only achieves efficient absorption of acid gases, but also reduces the secondary pollution problem in traditional dry dust removal.

[0077] Embodiment 3:

[0078] Practical applications in industrial scenarios

[0079] 1. Application scenarios

[0080] The device is installed in the tail gas emission system of a copper smelter to treat SO2 and smoke generated during the smelting process.

[0081] 2. Industrial operation effect

[0082] Through continuous 24-hour monitoring, the device operates stably and treats exhaust emissions of 2,000 cubic meters per hour. Emission test results show that the SO2 concentration in the exhaust gas has dropped below 15ppm, far below the 50ppm required by the national environmental protection standard; the PM2.5 concentration is 8μg / m 3 , which is significantly lower than the industry emission limits.

[0083] 3. Maintenance cycle and energy consumption analysis

[0084] The device uses automatic dust cleaning and vibration mechanisms, which greatly reduces the number of equipment shutdowns for dust cleaning, and the daily maintenance cycle is extended to one quarter. At the same time, the water tank circulation system reduces the consumption of absorbent, achieving energy saving and consumption reduction. The overall energy consumption is reduced by about 20% compared with traditional exhaust gas treatment equipment.

[0085] In summary, the smelting tail gas dust removal and purification device of the present invention effectively solves the particulate matter and acid gas pollution problems in the tail gas emissions during the smelting process by combining multi-stage filtration, vibration cleaning and water tank absorption. Compared with the traditional tail gas treatment system, the device has a compact structure, stable operation, thorough cleaning, and good energy-saving effect. It is widely used in metallurgy, chemical industry and other industrial fields, providing a reliable solution for green production and environmental protection of enterprises.

[0086] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0087] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A smelting tail gas dust removal and purification device, comprising a first filter tower (1), a second filter tower (2), a water tank (3), a pulse airflow blowing device (4) and a vibration mechanism (5), characterized in that: The first filter tower (1) is connected to the second filter tower (2) via a gas pipeline (102); the first filter tower (1) is provided with an air intake pipeline (101) for introducing exhaust gas; A first filter plate (103) and a second filter plate (202) are respectively arranged inside the first filter tower (1) and the second filter tower (2), and both filter plates are provided with protrusions (2021) for dust cleaning vibration; The water tank (3) is connected to the second filtering tower (2), and a discharge port (301) is provided on the water tank (3) for discharging the treated gas; The pulse airflow spraying device (4) is connected to the filter tower via a circulation pipe (401) and is connected to a collection box (402) for collecting dust during dust cleaning; The vibration mechanism (5) comprises a rotating sleeve (5), a fixing frame (501), blades (502), a vibration column (503) and a double helical slide rail (504). The blades (502) are mounted on the rotating sleeve (5). When the pulse airflow spraying device (4) sprays, the rotating sleeve (5) is driven to rotate, thereby driving the vibration column (503) to reciprocate along the double helical slide rail (504) and hit the protrusion (2021), thereby achieving vibration cleaning.

2. The smelting tail gas dust removal and purification device according to claim 1 is characterized in that: The first filter tower (1) is used for primary filtration and removes larger dust particles through the first filter plate (103).

3. The smelting tail gas dust removal and purification device according to claim 1 is characterized in that: The second filter tower (2) is used for high-efficiency filtration, and further removes fine particles through the second filter plate (202).

4. The smelting tail gas dust removal and purification device according to claim 1 is characterized in that: The protrusions (2021) are evenly distributed on the surfaces of the first filter plate (103) and the second filter plate (202), and are used to cooperate with the vibration column (503) to collide.

5. The smelting tail gas dust removal and purification device according to claim 1 is characterized in that: The vibration column (503) slides along the double spiral slide rail (504) to achieve multi-angle impact of the protrusions (2021) on the surface of the filter plate.

6. The smelting tail gas dust removal and purification device according to claim 1 is characterized in that: The pulse airflow spraying device (4) periodically sprays airflow, which is guided to the surface of the filter plate through the circulation pipe (401) for dust removal.

7. The smelting tail gas dust removal and purification device according to claim 1 is characterized in that: The collection box (402) is used to collect dust generated during the pulse spraying and vibration cleaning process.

8. The smelting tail gas dust removal and purification device according to claim 1 is characterized in that: The air inlet pipe (101) and the air outlet pipe (201) are respectively arranged at the top and bottom of the first filter tower (1) and the second filter tower (2) to ensure smooth flow of exhaust gas.

9. The smelting tail gas dust removal and purification device according to claim 1, characterized in that: The blades (502) are used to drive the rotating sleeve (5) to rotate when the pulse airflow spraying device (4) sprays air, so that the vibration column (503) performs reciprocating motion.

10. The smelting tail gas dust removal and purification device according to claim 1, characterized in that: The water in the water tank (3) is used to absorb the acidic gas in the tail gas, and the treated tail gas is discharged through the discharge port (301).

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