Pretreatment device capable of realizing ultralow emission of flue gas
By introducing a wet washing device in the flue gas treatment, the heavy metal ions and arsenic compounds in the flue gas are separated in advance, and the problems of long and high cost in the existing technology are solved, thus achieving ultra-low flue gas emissions and saving investment. A goal that can be effective quickly.
Patent Information
- Application Number
- CN202323530462.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-25
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2033-12-25
AI Technical Summary
When processing smelting flue gases containing heavy metal ions and high arsenic, the equipment process is long and the production cost is high, making it difficult to achieve ultra-low emission requirements.
The wet washing device is used for pretreatment, and the fine dust and heavy metal ions in the flue gas, especially arsenic compounds, are separated and removed in advance through the spraying facility, reducing the pressure and cost of subsequent environmental protection facilities.
It achieves ultra-low flue gas emissions, reduces the operating pressure and cost of subsequent environmental protection facilities, and saves investment and fast results in equipment, and has the advantages of efficient dust removal, low system resistance, stable operation and low equipment costs.
Smart Images
Figure CN222286788U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of flue gas treatment, in particular to a pretreatment device capable of achieving ultra-low emission of flue gas. Background Art
[0002] At present, the national ecological environment management department has put forward "ultra-low emission" requirements for the emission standards of exhaust gas treatment of industrial kilns. Although the desulfurization and dust removal equipment are used at the back end to treat some smelting flue gases containing heavy metal ions and some smelting flue gases with high arsenic content, the emission requirements stipulated by the state can be met, but there are problems such as long equipment processes and high production costs. Utility Model Content
[0003] In line with the working idea of treating the problem from the source, the flue gas containing heavy metal ions, especially arsenic dust, is wet-washed through a pretreatment device, and most of the fine dust, heavy metal ions, and especially arsenic compounds in the flue gas are separated and removed in advance through washing, which not only alleviates the operating pressure of the subsequent environmental protection facilities, but also effectively separates the heavy metal ions and arsenic dust in the flue gas in advance. It avoids the problem of heavy metals and arsenic dust entering the subsequent process, which increases the difficulty of treatment and operating costs. The advantages of this device are: on the basis of retaining the original equipment, only adding a wet scrubbing device, a pretreatment device that can achieve ultra-low flue gas emissions with low investment and fast results is proposed. Adding pretreatment washing facilities for heavy metal ions and arsenic compounds on the basis of the original treatment facilities effectively solves the shortcomings of the original design, while reducing the operating pressure and cost of the subsequent equipment, and achieving the goal of ultra-low flue gas emissions with low investment and fast results.
[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a pretreatment device that can achieve ultra-low emissions of flue gas, including a box body, a fan, and its characteristics: a flue gas inlet is horizontally arranged in the middle of the left side of the box body, a fan is arranged on the left side of the flue gas inlet, a main infusion pipe is arranged on the top of the box body, and a first-stage spray, a second-stage spray, and a third-stage spray are arranged in sequence below the main infusion pipe, a circulating liquid pool is arranged in the lower middle part of the box body, a partition is vertically arranged on the right side of the box body, and a flue gas outlet is arranged in the middle of the right side of the box body.
[0005] As a further improvement of the utility model, a guide plate is arranged at the right end of the smoke inlet, and the opening and closing angle of the guide plate can be adjusted between 10-70 degrees.
[0006] As a further improvement of the utility model, the first-stage spraying is composed of 1-3 groups of spraying facilities, and the second-stage spraying is composed of 1-2 groups of spraying facilities.
[0007] As a further improvement of the utility model, the nozzles of the first-stage spray and the second-stage spray are evenly arranged on the upper, left and right sides in a door frame shape.
[0008] As a further improvement of the utility model, a circulating liquid communication port is provided at the lower end of the partition.
[0009] As a further improvement of the utility model, a circulating liquid inlet is provided at the bottom of the right side of the circulating liquid pool, and the circulating liquid inlet is connected to an external pool.
[0010] Beneficial effects of the utility model:
[0011] After being treated by the utility model, the flue gas can be pre-treated by using it in conjunction with the original flue gas treatment facilities. Most of the fine dust and heavy metal ions in the flue gas containing heavy metal ions, especially arsenic compounds, can be separated and removed in advance through washing, thereby reducing the pressure and operating costs of subsequent environmental protection facilities. The device has the advantages of high dust removal efficiency, low system resistance, low equipment cost, and stable operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a schematic diagram of the structure of the utility model;
[0013] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model. DETAILED DESCRIPTION
[0014] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0015] As attached Figure 1 and attached Figure 2The pretreatment device capable of achieving ultra-low emission of flue gas comprises a box body 10 and a fan 1, and is characterized in that: a flue gas inlet 2 is horizontally arranged in the middle of the left side of the box body 10, a fan 1 is arranged on the left side of the flue gas inlet 2, a liquid infusion main pipe 6 is arranged on the top of the box body 10, and a first-stage spray 4, a second-stage spray 5, and a third-stage spray 8 are arranged in sequence below the liquid infusion main pipe 6, a circulating liquid pool 14 is arranged in the middle and lower part of the box body 10, a partition 7 is vertically arranged on the right side of the box body 10, and a flue gas outlet 13 is arranged in the middle of the right side of the box body 10 A guide plate 3 is provided at the right end of the flue gas inlet 2, and the opening and closing angle of the guide plate 3 can be adjusted between 10 and 70 degrees. The dust-containing flue gas enters the interior of the box 10 from the flue gas inlet 2. Due to the presence of the guide plate 3, the flue gas will change its flow direction and will not be transported in a straight line. When the flue gas is turbulent, the particles in the flue gas contact with the spray water for sedimentation, effectively reducing most of the fine dust and heavy metal ions in the flue gas, especially arsenic-containing dust, meeting environmental protection requirements and achieving standard emissions.
[0016] Furthermore, the first-stage spray 4 is composed of 1-3 groups of spray facilities, and the second-stage spray 5 is composed of 1-2 groups of spray facilities. The nozzles of the first-stage spray 4 and the second-stage spray 5 are arranged evenly on the upper, left and right sides in a door frame shape. The delivery pump delivers the circulating liquid to the main infusion pipe 6, and sprays it into the interior of the box along the spray port. The spray liquid has a large density and a good adsorption effect, and can fully adsorb and settle the smoke dust.
[0017] Furthermore, a circulating liquid communication port 11 is provided at the lower end of the partition plate 7 , and the circulating liquid communication port 11 at the lower end of the partition plate 7 can effectively make the circulating liquid flow fully.
[0018] Furthermore, a circulating liquid inlet 12 is provided at the right bottom of the circulating liquid pool 14, and the circulating liquid inlet 12 is connected to the external pool 15. The external pool 15 serves as an important supplementary device for the circulating liquid, which replenishes the circulating liquid and purifies and removes impurities from the circulating liquid in time to remove heavy metals and arsenic compounds in the circulating liquid.
[0019] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A pretreatment device capable of achieving ultra-low flue gas emissions, comprising a housing (10) and a fan (1), characterized in that: A smoke inlet (2) is horizontally arranged at the middle of the left side of the box body (10), a fan (1) is arranged on the left side of the smoke inlet (2), a liquid infusion main pipe (6) is arranged at the top of the box body (10), and a first-stage spray (4), a second-stage spray (5), and a third-stage spray (8) are arranged in sequence below the liquid infusion main pipe (6), a circulating liquid pool (14) is arranged at the middle and lower part of the box body (10), a partition (7) is vertically arranged at the right part of the box body (10), and a smoke outlet (13) is arranged at the middle of the right side of the box body (10).
2. A pretreatment device capable of achieving ultra-low flue gas emissions according to claim 1, characterized in that: A guide plate (3) is provided at the right end of the smoke inlet (2), and the opening and closing angle of the guide plate (3) can be adjusted between 10 and 70 degrees.
3. A pretreatment device capable of achieving ultra-low flue gas emissions according to claim 1, characterized in that: The first-stage spraying (4) is composed of 1-3 groups of spraying facilities, and the second-stage spraying (5) is composed of 1-2 groups of spraying facilities.
4. The pretreatment device capable of achieving ultra-low flue gas emissions according to claim 1, characterized in that: The nozzles of the first-stage spray (4) and the second-stage spray (5) are arranged evenly on the top, left and right sides in a door frame shape.
5. The pretreatment device capable of achieving ultra-low emission of flue gas according to claim 1, characterized in that: A circulating liquid communication port (11) is provided at the lower end of the partition plate (7).
6. A pretreatment device capable of achieving ultra-low flue gas emissions according to claim 1, characterized in that: A circulating liquid inlet (12) is provided at the right bottom of the circulating liquid pool (14), and the circulating liquid inlet (12) is connected to an external pool (15).