Efficient venturi wet dust collector

Abstract

The utility model discloses an efficient venturi wet dust collector which comprises a centrifugal fan, a cyclone cylinder, a venturi spray pipe and a bottom sewage tank, the venturi spray pipe comprises a spray pipe and a venturi nozzle; dust-containing gas enters the dust remover through an inlet of the cyclone cylinder, while the dust-containing gas enters the dust remover, the washing liquid is sprayed out from the Venturi nozzles on the spraying pipe to form a fog curtain to absorb dust, dust-containing liquid drops of the absorbed dust enter the cylinder body tangentially through the wall of the cyclone cylinder body, and the gas and the dust-containing liquid drops are separated by utilizing centrifugal force; dust-containing liquid drops flow into a bottom sewage tank, and clean gas is discharged through a centrifugal fan, so that the problems of high-efficiency and low-energy-consumption wet dust removal and purification of high-temperature, high-concentration, flammable and explosive dust gas and blockage prevention and easy maintenance in the wet dust removal and purification process are solved.

Description

Technical Field

[0001] This utility model relates to the field of dust removal, specifically a high-efficiency Venturi wet dust collector. Background Technology

[0002] With the rapid development of industry, various factories, such as foundry workshops, shot blasting workshops, and lithium battery pulping workshops, generate a large amount of dust during the production process. This dust not only pollutes the production environment but also poses a significant threat to human health. In fact, some metal dust can explode when exposed to fire at certain concentrations.

[0003] The most commonly used dust collectors in factories are dry dust collectors, such as bag filters and cartridge filters. Although they have high dust removal efficiency, they are difficult to handle when encountering dust that is hot, flammable, or explosive.

[0004] Wet scrubbers overcome some of the shortcomings of dry scrubbers and can handle high-temperature, flammable, and explosive dust. Among them, the venturi scrubber, as a type of wet scrubber, is widely used for cooling and dust removal of high-temperature flue gas, as well as for the removal of high-concentration metal dust and the recovery of valuable metal materials.

[0005] Venturi scrubbers, as a type of highly efficient wet dust collection equipment, have advantages such as simple structure, small footprint, and high dust collection efficiency, but they also have some disadvantages:

[0006] 1. High energy consumption: Venturi dust collectors consume a lot of energy during operation, especially during the atomization process, which requires high energy input to break water droplets into extremely fine particles.

[0007] 2. Prone to clogging: Due to the internal structure of the venturi dust collector, dust is easily accumulated inside the tube, which can lead to blockage and affect the normal operation of the equipment.

[0008] High maintenance costs: The maintenance of Venturi dust collectors is relatively complex, requiring regular cleaning of the dust accumulation in the pipes, as well as equipment inspection and repair. Utility Model Content

[0009] To address the shortcomings of existing technologies, this utility model provides a high-efficiency Venturi wet dust collector to solve the problems of efficient, low-energy wet dust removal and purification of high-temperature, high-concentration, flammable and explosive dust gases, as well as the problems of preventing clogging and easy maintenance during the wet dust removal and purification process.

[0010] To achieve the above objectives, the present invention adopts the following technical solution:

[0011] A high-efficiency Venturi wet scrubber includes a centrifugal fan, a cyclone separator, a Venturi nozzle, and a bottom wastewater tank. The Venturi nozzle includes a spray pipe and a Venturi nozzle. Dust-laden gas enters the scrubber through the inlet of the cyclone separator. At the same time as the dust-laden gas enters, the scrubbing liquid is sprayed out from the Venturi nozzle on the spray pipe to form a mist that absorbs the dust. The dust-laden droplets are tangentially inserted into the interior of the cyclone separator through the wall of the separator. Centrifugal force is used to separate the gas and the dust-laden droplets. The dust-laden droplets flow into the bottom wastewater tank, and the clean gas is discharged through the centrifugal fan.

[0012] Further preferably, the spray zone of the Venturi nozzle forms a fog curtain at the point of contact with the flue gas.

[0013] Furthermore, a nozzle baffle is provided at the venturi nozzle;

[0014] In a further preferred embodiment, the bottom of the cyclone is provided with a lifting cap, through which clean gas is guided into the centrifugal fan for discharge.

[0015] Further optimization involves providing a quick-opening maintenance door at the top and bottom of the cyclone.

[0016] Further preferably, the wastewater tank is equipped with an automatic stirrer, a density meter, and a liquid level detector.

[0017] Further optimization involves adopting a cyclone tangential entry for the flue gas inlet of the dust collector.

[0018] This utility model has the following beneficial effects:

[0019] This utility model discloses a high-efficiency Venturi wet dust collector with the following features: Cyclone tangential air inlet: The flue gas inlet of the dust collector adopts a cyclone tangential entry, using the centrifugal force of the airflow to separate dust-laden droplets. Fog curtain absorption: A fog curtain can be formed at the contact point between the Venturi nozzles and the flue gas, effectively absorbing the dust in the flue gas. Anti-clogging design: Baffles are installed at the Venturi nozzles to prevent nozzle clogging. Convenient maintenance: A quick-opening maintenance door is provided at both the top and bottom of the cyclone casing for convenient equipment inspection and maintenance. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the high-efficiency Venturi nozzle wet dust collector of this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the Venturi nozzle of this utility model.

[0022] Attached diagram labels: 1 is centrifugal fan, 2 is cyclone separator, 3 is venturi nozzle, 3-1 is injection pipe, 3-2 is venturi nozzle, 3-3 is nozzle baffle, and 4 is wastewater tank. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and relevant knowledge. Obviously, the described applications are only some embodiments of the present invention, and not all embodiments.

[0024] The present invention will be further described in detail below with reference to the accompanying drawings.

[0025] Example 1: Refer to Figures 1-2 As shown, the high-efficiency Venturi wet dust collector includes a centrifugal fan 1, a cyclone separator 2, a Venturi nozzle 3, and a wastewater tank 4. The Venturi nozzle 3 includes a spray pipe 3-1 and a Venturi nozzle 3-2. Dust-laden gas enters the dust collector through the inlet of the cyclone separator 2. At the same time as the dust-laden gas enters, the washing liquid is sprayed out from the Venturi nozzle 3-2 on the spray pipe 3-1 to form a mist to absorb the dust. The dust-laden droplets that have absorbed the dust enter the interior of the cyclone separator tangentially through the wall 2 of the cyclone separator. The gas and dust-laden droplets are separated by centrifugal force. The dust-laden droplets flow into the wastewater tank 4, and the clean gas is discharged through the centrifugal fan 1.

[0026] Working principle: Dust-laden gas enters: Dust-laden gas enters the dust collector through the inlet of cyclone 2.

[0027] Fog formation and dust absorption: As dust-laden gas enters the dust collector, the washing liquid is sprayed out from the Venturi nozzle 3-2 on the nozzle 3-1 to form a full-coverage fog curtain. After the gas and liquid come into contact, vapor mist is formed, which fully absorbs the dust in the flue gas.

[0028] Gas-liquid separation: Reference Figure 1 As shown, the absorbed dust enters the interior of the cyclone tangentially through the cyclone cylinder wall. Centrifugal force separates the gas and dust-laden droplets. The dust-laden droplets flow downwards, while the clean gas is guided into the centrifugal fan 1 through the air lift cap and then discharged through the centrifugal fan.

[0029] Dust-laden droplet collection and treatment: Downward-flowing dust-laden droplets are collected by the conical hopper at the bottom of the cyclone separator and flow into the bottom wastewater tank 4. The wastewater tank is equipped with an automatic stirrer, a density meter, and a level detector to prevent sedimentation and accumulation. It also monitors density and level in real time, automatically discharging wastewater when either reaches a set value. The discharged dust-laden wastewater contains usable metal dust that can be recycled; unusable wastewater can be periodically pressed into blocks for centralized treatment. This invention achieves high-efficiency dust removal: it can efficiently remove high-temperature, high-concentration, flammable, and explosive metal dust. Low energy consumption: low operating resistance and low energy consumption. Convenient maintenance: low clogging probability and easy maintenance.

[0030] This utility model mainly employs the following methods: Cyclone tangential air intake: The flue gas inlet of the dust collector adopts cyclone tangential entry, using the centrifugal force of the airflow to separate dust-laden droplets. Fog curtain absorption: A fog curtain can be formed at the contact point between the venturi nozzle and the flue gas, effectively absorbing the dust in the flue gas. Anti-clogging design: Baffles are installed at the venturi nozzles to prevent nozzle clogging. Flow diversion and drag reduction: An air-lift cap is installed at the bottom of the cyclone body to divert and reduce drag. Convenient maintenance: A quick-opening maintenance door is provided at both the top and bottom of the cyclone body for convenient equipment maintenance.

[0031] Further preferably, in this invention, the bottom of the cyclone 2 is provided with a lifting cap, located between the air inlet of the cyclone 2 and the bottom sewage tank 4. Clean gas is guided into the centrifugal fan 1 and discharged through the lifting cap. The lifting cap is essentially a straight cylinder with several air holes on its wall, through which gas flows out. Alternatively, it can be a cone shape, wider at the bottom and narrower at the top, with a closed top and air holes on the sides to allow gas to diffuse out. No particular limitation is made in this application; the main purpose is to guide the gas flow and facilitate flow reduction and resistance decrease. A simpler method in this invention is to open an air inlet on the upper side of the bottom sewage tank 4, which can also serve the purpose of guiding (airflow). The main goal is to introduce clean air to achieve the desired effect; the specific method of guiding the airflow is not limited.

[0032] Example 1, High-efficiency Venturi wet dust collector, refer to Figure 1 and Figure 2 As shown, when dust-laden gas enters the cyclone 2, it enters in a tangential manner, generating a rotating airflow inside the cyclone.

[0033] At the same time, the washing liquid is sprayed out through the Venturi nozzle 3-2 on the spray pipe 3-1, which enables the washing liquid to form a full-coverage fog screen. The dust-laden gas comes into full contact with the fog screen, and the dust is absorbed by the washing liquid.

[0034] The washing liquid, after absorbing dust, forms dust-laden droplets. Inside the cyclone separator, centrifugal force causes these droplets to be thrown against the cyclone separator wall 2 and flow downwards. They are then collected by the conical hopper at the bottom of the cyclone separator and flow into the bottom wastewater tank 4. Meanwhile, the purified clean gas is guided through the air lifter cap to the centrifugal fan 1 and finally discharged by the centrifugal fan.

[0035] In the bottom wastewater tank 4, an automatic stirrer operates continuously to prevent dust-laden droplets from settling and accumulating. A density meter and a level detector monitor the density and level of the wastewater in real time. When the set value is reached, the automatic sewage discharge system is activated. The discharged dust-laden wastewater undergoes different treatments depending on whether it contains useful metal dust. Useful dust can be recycled, while useless dust is periodically pressed into blocks for centralized treatment.

[0036] When equipment needs to be inspected and maintained, the quick-opening inspection doors set at the top and bottom of the cyclone can be opened quickly, making it convenient for maintenance personnel to inspect, clean and repair the internal parts of the equipment, such as the inside of the cyclone 2 and the Venturi nozzle 3, greatly improving the convenience and efficiency of inspection and maintenance.

[0037] Although some embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, and all such changes and alterations should fall within the scope of the present invention.

Claims

1. A high-efficiency Venturi wet dust collector, characterized in that, The system includes a centrifugal fan (1), a cyclone separator (2), a venturi nozzle (3), and a wastewater tank (4). The venturi nozzle (3) includes a spray pipe (3-1) and a venturi nozzle (3-2). Dust-laden gas enters the dust collector through the inlet of the cyclone separator (2). At the same time as the dust-laden gas enters, the washing liquid is sprayed out from the venturi nozzle (3-2) on the spray pipe (3-1) to absorb the dust. The dust-laden droplets that have absorbed the dust enter the interior of the cyclone separator (2) through the wall of the cyclone separator (2). The gas and dust-laden droplets are separated by centrifugal force. The dust-laden droplets flow into the wastewater tank (4), and the clean gas is discharged through the centrifugal fan (1).

2. The high-efficiency Venturi wet dust collector according to claim 1, characterized in that, A nozzle baffle (3-3) is provided at the Venturi nozzle (3-2), and a fog curtain is formed in the spray area of ​​the Venturi nozzle (3) at the contact position of the flue gas.

3. The high-efficiency Venturi wet dust collector according to claim 1, characterized in that, The bottom of the cyclone (2) is equipped with a lifting cap, through which clean gas is guided into the centrifugal fan (1) and discharged.

4. The high-efficiency Venturi wet dust collector according to claim 1, characterized in that, The cyclone (2) is equipped with a quick-opening maintenance door at the top and bottom.

5. The high-efficiency Venturi wet dust collector according to claim 1, characterized in that, The wastewater tank (4) is equipped with an automatic stirrer, a density meter, and a liquid level detector.

6. The high-efficiency Venturi wet dust collector according to claim 1, characterized in that, The flue gas inlet of the dust collector is tangentially introduced into the cyclone tube (2).

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