A pre-dust removal device of a wet dust removal gas washer
By employing a two-stage wet purification and wastewater recycling design with a pre-dust removal device, the problems of low dust purification efficiency and high wastewater treatment costs in high-temperature and humid environments are solved, achieving efficient dust removal and environmentally friendly emissions while reducing equipment maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XIAN LYUDU ENVIRONMENTAL PROTECTION TECH CO LTD
- Filing Date
- 2025-08-26
- Publication Date
- 2026-07-24
AI Technical Summary
Existing wet dust collection equipment is not efficient enough in purifying high-temperature and humid dust, and wastewater treatment costs are high, making it difficult to meet environmental emission requirements and reduce maintenance costs.
The pre-dust removal device, which adopts a two-stage wet purification method, includes a pre-dust removal chamber, water spray nozzles, guide impellers, and a wet dust removal air scrubber. It achieves dry and wet separation through two water mist collisions. Combined with a wastewater recycling unit, it enables wastewater reuse, reduces dust concentration and maintenance costs.
It improves dust removal efficiency, meets environmental emission requirements, reduces dust concentration in exhaust gases, and reduces equipment maintenance costs through wastewater recycling.
Smart Images
Figure CN224541322U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of dust removal equipment for moist dust, and more specifically to the technical field of dust removal equipment for humidifying mixer unloading and the technical field of wet dust scrubbing machine for mining. This utility model relates to a pre-dust removal device for a wet dust scrubbing machine. Background Technology
[0002] In dust-generating areas such as metallurgy, mining, underground coal mining, and coal yard ash and slag unloading in thermal power plants, large amounts of dust pose safety hazards and seriously affect the physical and mental health of workers. Especially for humid dust gases, corresponding to the dust generated in underground coal mining and coal conveyor belt dust in thermal power plants, there are already successful cases and practices using mine-specific wet dust scrubbers. However, because the internal structure of these wet dust scrubbers only incorporates a single-stage water mist purification dust removal measure, their dust reduction efficiency is not optimal and there is room for improvement.
[0003] In many industrial production processes, it is often necessary to humidify and mix pulverized and powdered materials before loading, unloading, and transfer. This often results in a large amount of hot, humid dust and gas spreading everywhere, seriously polluting the surrounding environment. For example: 1) When unloading and loading wet ash and slag from the ash and slag silo of a thermal power plant, the unloading equipment consists of a humidifying twin-shaft mixer located on the second floor of the ash and slag silo. The transport vehicles are parked on the first floor of the ash and slag silo. The discharge port of the humidifying twin-shaft mixer is fixed to the ceiling of the first floor of the ash and slag silo. The dry ash and slag powder first enters the humidifying mixer for humidification and mixing, and then becomes wet ash and slag material. It is then pushed out from the humidifying mixer discharge port and then unloaded into an open truck bed parked on the ground floor of the ash and slag silo below. At this time, the wet ash and slag material generates a large amount of humid dust and gas during the process of falling into the truck bed. Especially in winter in northern regions, when the hot ash and slag powder encounters cold water for humidification and mixing, even more hot, humid dust and hot steam will spread everywhere, obstructing the workers' vision and causing material to overflow from the truck bed during unloading and loading. There are many other dust pollution phenomena similar to those caused by the unloading and loading of wet ash and slag from power plants, which generate large amounts of high-temperature and humid dust and gas. Currently, there are no successful cases of such pollution, either domestically or internationally. Therefore, it is urgent to address the dust pollution phenomenon caused by large amounts of high-temperature and humid dust and gas.
[0004] Before the advent of wet scrubbing and dust removal equipment for mining, numerous attempts were made to address the problem of removing large quantities of high-temperature, humid dusty gases: 1) Using dry bag filters resulted in filter bags becoming clogged due to moisture, leading to a high failure rate; 2) Using waterproof sintered plates as the internal filter material in dry dust collectors resulted in blockages caused by slurry discharge into the system's structural chambers. Furthermore, domestically produced sintered plates cannot filter humid dusty gases above 80°C, severely limiting their industrial applications and incurring significant costs; 3) Spray dust suppression methods struggled to meet stringent national environmental emission standards; 4) Other methods, such as water curtain walls, also failed to meet these standards, and the subsequent wastewater settling and slurry disposal caused ongoing maintenance and treatment issues, resulting in substantial costs. Currently, none of these four dust removal technologies for large quantities of high-temperature, humid dusty gases achieve ideal results.
[0005] The purpose of this utility model is to provide a dry-wet separation purification device system with a simple structure and higher dust removal effect. It can not only improve the overall dust removal efficiency by using a two-stage wet purification method for high-temperature and humid dust gas, but also synchronously return and reuse the wastewater generated during system operation without external discharge, thus reducing future maintenance costs. Utility Model Content
[0006] In order to overcome the shortcomings of the existing technology, this utility model provides a pre-dust removal device for a wet scrubbing machine, which not only has a two-stage wet purification and dust removal method in the wet dust removal system solution, improving the purification efficiency to meet the strict requirements of national environmental protection emissions, but also has the advantages of simultaneous wastewater recycling without external discharge and reduced future maintenance costs.
[0007] To achieve the above objectives, this utility model provides the following technical solution: a pre-dust removal device for a wet scrubbing machine, comprising a pre-dust removal chamber, a connector, a wet scrubbing machine, and a wastewater recovery unit connected in series. Several water spray nozzles, guide impellers, impeller conical bases, a first water inlet, and a first sewage outlet are disposed inside the pre-dust removal chamber. The wet scrubbing machine is composed of a power impeller water mist unit, a dehydration unit, a second water inlet, and a second sewage outlet. The wastewater recovery unit is connected to the first and second sewage outlets via the wastewater pipeline. The wastewater pump synchronously transports the wastewater to the humidifying mixer for consumption.
[0008] As a preferred technical solution of this utility model, the pre-dust removal box is arranged at the front end of the wet dust removal and air scrubbing machine and connected to each other by connectors.
[0009] As a preferred technical solution of this utility model, the front end of the pre-dust removal box is connected to an air inlet, the plurality of water spray nozzles are fixed to the front end of the guide impeller, the guide impeller is fixedly connected to the outer periphery of the impeller conical base, and the impeller conical base is fixedly connected to the middle position of the front end inside the pre-dust removal box and arranged parallel to the pre-dust removal box.
[0010] In a preferred embodiment of this invention, the first water inlet supplies water to the plurality of water spray nozzles, which are fixed to the front end of the guide impeller. When the humid dusty gas entering the pre-dust removal chamber passes through the guide impeller, the plurality of water spray nozzles spray water mist in the same direction to purify and remove dust. That is, the dust collides and combines with the water mist for the first time to form slurry, thus achieving the initial reduction of dust concentration.
[0011] As a preferred embodiment of this utility model, one end of the sewage pipe is connected to the interior of the lower end of the first sewage outlet, the middle position of the sewage pipe is connected to the interior of the lower end of the second sewage outlet, and the other end of the sewage pipe is connected to the input end of the sewage pump.
[0012] As a preferred technical solution of this utility model, a power impeller water mist unit is installed at the front end of the wet dust removal and air scrubbing machine, and a dehydration unit is installed at the rear end of the wet dust removal and air scrubbing machine, with an air outlet connected to the rear end of the dehydration unit.
[0013] In a preferred embodiment of this invention, the second water inlet supplies water to the power impeller water mist unit inside the wet dust scrubber. When dust passes through the power impeller water mist unit, the dust collides and combines with the water mist for a second time to form slurry, thus achieving a secondary reduction in dust concentration.
[0014] As a preferred embodiment of this utility model, the second drain outlet is fixedly connected to the lower surface of the wet dust removal and air scrubbing machine, and the second drain outlet is connected to the interior of the wet dust removal and air scrubbing machine.
[0015] As a preferred technical solution of this utility model, the first sewage outlet and the second sewage outlet are connected by the sewage pipe, and the sewage pump synchronously transports the sewage to the humidifying mixer for consumption.
[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model has a simple structure and is suitable for use in small spaces. It improves the overall dust removal efficiency through secondary wet purification and dust removal, and more efficiently reduces the dust concentration of the emitted gas, meeting the strict requirements of national environmental protection emission standards. During operation, it also has a closed-loop process for wastewater recirculation and consumption, realizing no wastewater discharge and reducing equipment maintenance costs. 2. This utility model can be upgraded simply by adding a pre-dust removal box (containing several water spray nozzles, an impeller conical base, a first water inlet, a first sewage outlet, a sewage pump, etc.) to the front end of the connector. It can be used for the production of new products as well as for the upgrade and transformation of existing wet scrubbing equipment, and has high promotional value. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional view of the present invention. Figure 1 ; Figure 3 This is a cross-sectional view of the present invention. Figure 2 .
[0018] In the diagram: 1. Pre-dust removal chamber; 11. Air inlet; 12. Impeller conical base; 13. Guide impeller; 14. First water inlet; 15. Several water spray nozzles; 16. First sewage outlet; 2. Connecting parts; 3. Wet dust removal and air scrubbing machine; 31. Power impeller water mist unit; 32. Dehydration unit; 33. Air outlet; 34. Second water inlet; 35. Second sewage outlet; 4. Sewage pipe; 5. Sewage pump; 6. Humidifying mixer. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0020] like Figures 1 to 3 As shown, this utility model provides a pre-dust removal device for a wet scrubbing machine, comprising: a pre-dust removal chamber 1, a connecting piece 2, a wet scrubbing machine 3, and a wastewater recovery unit connected in series; a plurality of water spray nozzles 15, guide impellers 13, impeller conical bases 12, a first water inlet 14, and a first sewage outlet 16 are arranged inside the pre-dust removal chamber; the wet scrubbing machine 3 is composed of a power impeller water mist unit 31, a dehydration unit 32, a second water inlet 34, and a second sewage outlet 35; the wastewater recovery unit is connected to the first sewage outlet 16 and the second sewage outlet 35 by a wastewater pipe 4; and a wastewater pump 5 synchronously transports wastewater to the humidifying mixer 6 for consumption.
[0021] The pre-dust removal box 1 is located at the front end of the wet dust removal scrubbing machine 3 and is connected to each other by the connector 2. The rear end of the wet dust removal scrubbing machine 3 is equipped with a sewage pump 5, and the inlet of the sewage pump 5 is connected to a sewage pipe 4. The sewage pipe 4 is connected to the interior of the lower surface of the first sewage outlet 16 and the second sewage outlet 35. The outlet of the sewage pump 5 is connected to a humidifying mixer 6.
[0022] An external power source can provide power to the sewage pump 5. After the sewage pump 5 is started, it can simultaneously transport the sewage from the first sewage outlet 16 and the second sewage outlet 35 through the sewage pipe 4 to the humidifying mixer 6 for consumption. This design can form a closed-loop process unit for the sewage recycling unit, thereby achieving the goal of not discharging sewage to the outside.
[0023] The first water inlet 14 is connected to the interior of one side surface of the pre-dust removal box cylinder 1.
[0024] Water can be supplied to several spray nozzles 15 through the first water inlet 14. When the humid dust gas entering the pre-dust removal chamber 1 passes through the guide impeller 13, water mist is sprayed in the same direction to purify and remove dust. That is, the dust collides and combines with the water mist for the first time to form mud and is separated into dry and wet, which plays the role of initially reducing the dust concentration.
[0025] The pre-dust removal chamber 1 has an air inlet 11 connected to its front end. Several water spray nozzles 15 are fixed to the front end of the guide impeller 13. The guide impeller 13 is fixedly connected to the outer periphery of the impeller conical base 12. The impeller conical base 12 is fixedly connected to the middle position of the front end inside the pre-dust removal chamber 1.
[0026] With the guide impeller 13 tilted at an angle of 30°, the guide impeller 13 has a guiding function. When the wet dust airflow after the initial wet purification is guided to the rear end of the pre-dust removal box 1 and moves rapidly in a spiral cyclone, the sludge in the rotating airflow adheres to the inner wall of the pre-dust removal box 1 and flows backward. The sludge has good fluidity on the surface of the impeller conical base 12, so it is not easy to stay or be caking.
[0027] One end of the sewage pipe 4 is connected to the interior of the lower end of the first sewage outlet 16, the middle part of the sewage pipe 4 is connected to the interior of the lower end of the second sewage outlet 35, and the other end of the sewage pipe 4 is connected to the input end of the sewage pump 5.
[0028] Wastewater generated inside the pre-dust removal chamber 1 can be collected through the first drain outlet 16.
[0029] The wet dust scrubbing machine 3 has a power impeller water mist unit 31 installed at the front end, a dehydration unit 32 installed at the rear end, an air outlet 33 connected to the rear end, and a second water inlet 34 connected to the interior of one side surface.
[0030] Water is supplied to the power impeller water mist unit 31 inside the wet dust scrubber 3 through the second water inlet 34. When the dust passes through the power impeller water mist unit 31, the dust collides and combines with the water mist for the second time to form mud, which is then separated into dry and wet, thus reducing the dust concentration for the second time.
[0031] The second drain outlet 35 is fixedly connected to the lower surface of the wet dust scrubbing machine 3, and the second drain outlet 35 is connected to the interior of the lower surface of the wet dust scrubbing machine 3.
[0032] Wastewater generated inside the wet scrubbing machine 3 can be collected through the second drain outlet 35.
[0033] The first sewage outlet 16 and the second sewage outlet 35 are connected by a sewage pipe 4, and the sewage pump 5 simultaneously transports the sewage to the humidifying mixer 6.
[0034] The sewage from the first discharge port 16 and the second discharge port 35 is simultaneously transported to the humidifying mixer 6 by the sewage pump 5 and thus consumed.
[0035] The working principle and usage process of this utility model are as follows: First, water is supplied to several spray nozzles 15 through the first water inlet 14. The spray nozzles 15 spray water outward. When the dust-laden gas enters the interior of the pre-dust removal chamber 1 through the air inlet 11, the dust-laden gas collides with the water mist for the first time when passing through the guide impeller 13, forming a slurry that is separated into wet and dry, thus initially reducing the dust concentration. Then, the moist dust-laden airflow after the initial wet purification is guided by the guide impeller 13 to the rear end of the pre-dust removal chamber 1 and moves rapidly in a spiral cyclone manner. This causes the slurry in the rotating airflow to adhere to the inner wall of the pre-dust removal chamber 1 and flow backward into the interior of the first drain outlet 16. Then, the dust-laden gas re-enters the interior of the wet scrubbing machine 3, and water is supplied to the power impeller water mist unit 31 inside the wet scrubbing machine 3 through the second water inlet 34. When the dust passes through the power impeller water mist unit 31, the dust collides and combines with the water mist for the second time to form slurry, which is separated into dry and wet, thus reducing the dust concentration for the second time. Finally, the gas treated by the dehydration unit 32 will be discharged outward through the air outlet 33, and the slurry separated by the dehydration unit 32 will flow into the interior of the second sewage outlet 35. At this time, the sewage pump 5 is started to draw sewage from the first sewage outlet 16 and the second sewage outlet 35 through the sewage pipe 4 and then transport it to the interior of the humidifying mixer 6.
[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0037] Although 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, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A pre-dust removal device for a wet scrubbing machine, characterized in that: The pre-dust removal chamber (1), connector (2), wet scrubbing machine (3), sewage pipe (4), sewage pump (5), humidifying mixer (6) are provided inside the pre-dust removal chamber (1). Several water spray nozzles (15), guide impellers (13), impeller conical base (12), first water inlet (14), and first sewage outlet (16) are provided inside the pre-dust removal chamber (1). The wet scrubbing machine is composed of a power impeller water mist unit (31), a dehydration unit (32), a second water inlet (34), and a second sewage outlet (35). The first sewage outlet (16) and the second sewage outlet (35) are connected by the sewage pipe (4). The sewage pump (5) simultaneously transports sewage to the humidifying mixer (6).
2. The pre-dust removal device for a wet scrubbing machine according to claim 1, characterized in that: The pre-dust removal box (1) is located at the front end of the wet dust removal scrubbing machine (3) and is connected to each other by connector (2).
3. The pre-dust removal device for a wet scrubbing machine according to claim 1, characterized in that: One end of the sewage pipe (4) is connected to the interior of the lower end of the first sewage outlet (16), the middle position of the sewage pipe (4) is connected to the interior of the lower end of the second sewage outlet (35), and the other end of the sewage pipe (4) is connected to the input end of the sewage pump (5).
4. The pre-dust removal device for a wet scrubbing machine according to claim 1, characterized in that: The front end of the pre-dust removal box (1) is connected to an air inlet (11). The plurality of water spray nozzles (15) are fixed to the front end of the guide impeller (13). The guide impeller (13) is fixedly connected to the outer periphery of the impeller conical base (12). The impeller conical base (12) is fixedly connected to the middle position of the front end inside the pre-dust removal box (1) and is arranged parallel to the pre-dust removal box (1).
5. The pre-dust removal device for a wet scrubbing machine according to claim 1, characterized in that: The first water inlet (14) supplies water to the plurality of water nozzles (15), and the second water inlet (34) supplies water to the power impeller water mist unit (31) inside the wet dust scrubbing machine (3).