Novel flame-retardant conductive sulfuric acid corrosion-resistant electrostatic demister

Abstract

The invention provides a novel flame-retardant conductive sulfuric acid corrosion-resistant electrostatic demister, and belongs to the technical field of environmental protection equipment. The problems of stress concentration of a tube bundle and a shell, difficulty in maintenance and high equipment failure rate caused by a hanging type structure of a traditional electrostatic demister are solved. The device comprises a supporting mechanism and a plurality of anode tube bundles, the anode tube bundles are arranged in the supporting mechanism in the vertical direction, a plurality of anode tube bundle fixing plates are sequentially arranged in the supporting mechanism in parallel in the vertical direction, and the anode tube bundles penetrate through the anode tube bundle fixing plates. The supporting mechanism comprises a top horizontal frame and a tube bundle supporting frame which are arranged in parallel, the top horizontal frame is arranged above the tube bundle supporting frame, and the top horizontal frame and the tube bundle supporting frame are connected through a plurality of connecting vertical beams. The anode tube bundle fixing plate located on the lower portion abuts against the tube bundle supporting frame and is matched with the tube bundle supporting frame. The device is mainly used for electrostatic demisting.

Description

Technical Field

[0001] The present invention belongs to the technical field of environmental protection equipment, and particularly relates to a novel electrostatic demister with flame retardancy, conductivity and sulfuric acid corrosion resistance. Background Art

[0002] With the continuous development of industrial technology and the continuous expansion of industrial production, the problem of environmental pollution has become increasingly severe. Many enterprises will choose to use electrostatic demisters to treat the acid mist in the production of sulfuric acid from smelting flue gas, the tail gas treatment of titanium dioxide calcination, and various acid mists in chemical plants, so as to ensure that the acid mist volume at the outlet of the electrostatic demister meets the standard, so as to ensure the normal progress of subsequent reactions and the compliance of the final tail gas emissions.

[0003] At present, in the sulfur oxidation process (SOP) and spent acid regeneration process (SAR), the acid mist removal efficiency should be not less than 99%, and the equipment life should be greater than 5 years. The material of the anode tube bundle of the traditional electrostatic demister has insufficient sulfuric acid corrosion resistance (such as the annual corrosion rate of ordinary carbon steel is greater than 0.5 mm), and the flame retardancy is poor (UL94 HB grade), there are potential safety hazards. The hanging structure causes stress concentration between the tube bundle and the shell, resulting in the risk of structural deformation, difficult maintenance, and high equipment failure rate. Summary of the Invention

[0004] In view of this, the present invention aims to propose a novel electrostatic demister with flame retardancy, conductivity and sulfuric acid corrosion resistance to solve the problems of stress concentration between the tube bundle and the shell, difficult maintenance and high equipment failure rate caused by the hanging structure of the traditional electrostatic demister.

[0005] To achieve the above object, the present invention adopts the following technical solution: A novel electrostatic demister with flame retardancy, conductivity and sulfuric acid corrosion resistance, which includes a support mechanism and a plurality of anode tube bundles. The plurality of anode tube bundles are arranged vertically in the support mechanism. A plurality of anode tube bundle fixing plates are arranged in parallel along the vertical direction in the support mechanism. The anode tube bundles pass through the plurality of anode tube bundle fixing plates. The support mechanism includes a top horizontal frame and a tube bundle support frame arranged in parallel. The top horizontal frame is arranged above the tube bundle support frame. The top horizontal frame and the tube bundle support frame are connected by a plurality of connecting vertical beams. One of the anode tube bundle fixing plates located below abuts against the tube bundle support frame and cooperates with the tube bundle support frame.

[0006] Furthermore, a middle support beam is arranged on the tube bundle support frame. A middle reserved support position corresponding to the middle support beam is arranged on the anode tube bundle fixing plate. The middle reserved support position of one of the anode tube bundle fixing plates located below abuts against the middle support beam and cooperates with the tube bundle support frame.

[0007] Furthermore, an outer shell is provided around the outer side of the support mechanism, and the outer shell includes a plurality of outer shell plates. The outer shell plates are made of metal and are arranged around the outer sides of a plurality of connecting vertical beams. A connecting angle steel is provided between the top of the connecting vertical beam and the bottom of the top horizontal frame, and the top of the outer shell plate is connected to the connecting vertical beam through the connecting angle steel.

[0008] Furthermore, fixed ear plates are provided on both sides of the connecting vertical beam, and the two sides of the connecting vertical beam are connected to the outer shell plates on both sides of the connecting vertical beam through two fixed ear plates respectively.

[0009] Furthermore, each of the anode tube bundles is penetrated by a cathode wire, and both ends of the cathode wire are disposed outside the anode tube bundle.

[0010] Furthermore, a demister top shell is arranged above the multiple anode tube bundles, a top connecting plate is arranged at the top end of the multiple anode tube bundles, the multiple anode tube bundles are connected to the demister top shell through the top connecting plate, and a plurality of supporting bodies are arranged on the outer side of the demister top shell, and the bottom of the supporting body is against the top horizontal frame and cooperates with the top horizontal frame.

[0011] Furthermore, a demister bottom shell is disposed below the plurality of anode tube bundles, a bottom connecting plate is disposed at the bottom end of the plurality of anode tube bundles, and the plurality of anode tube bundles are connected to the demister bottom shell via the bottom connecting plate.

[0012] Furthermore, cathode grids are arranged inside the top shell of the demister and the bottom shell of the demister, and the two ends of the cathode wire are respectively connected to the two cathode grids.

[0013] Furthermore, a plurality of insulating boxes are arranged on the outer side of the top shell of the demister.

[0014] Furthermore, a guide device is provided in the bottom shell of the demister, the guide device is below the cathode grid in the bottom shell of the demister, a diverter grid is provided at the bottom of the guide device, and the bottom of the diverter grid is connected to the bottom shell of the demister through a support rod.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention provides a novel flame-retardant, conductive, sulfuric acid-resistant electrostatic mist eliminator. The original hanging structure is changed into a bottom support structure by providing a support mechanism. The bottom support design is adopted to balance the stress distribution of the tube bundle and the shell, thereby avoiding the risk of structural deformation caused by stress concentration in the middle of the traditional hanging structure and enhancing the overall support strength of the equipment.

[0017] 2. The present invention provides a novel electrostatic demister with flame retardancy, conductivity, and sulfuric acid corrosion resistance. The outer shell adopts modular detachable shell plates, which can not only protect the tube bundle equipment, but also facilitate installation and do not require non-metallic welding for on-site construction, significantly shortening the construction period. The modular structure supports partial disassembly and maintenance without the need for overall shutdown, greatly improving the system operation continuity. Moreover, the entire metal shell is similar to a discharge wall, which can conduct all the static electricity inside the equipment into the ground or safety facilities.

[0018] 3. The present invention provides a novel electrostatic demister with flame retardancy, conductivity, and sulfuric acid corrosion resistance. It is provided with a fixing plate for the anode tube bundle and a support position is reserved in the middle of the fixing plate for the anode tube bundle, and is effectively supported by the middle support beam of the support mechanism, solving the problem of middle deformation when the number of tube bundles is large and avoiding the decline of the demisting efficiency caused by structural collapse. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0020] Figure 1 is a schematic diagram of the overall structure of a novel electrostatic demister with flame retardancy, conductivity, and sulfuric acid corrosion resistance according to the present invention;

[0021] Figure 2 is a schematic diagram of the structure of the support mechanism in a novel electrostatic demister with flame retardancy, conductivity, and sulfuric acid corrosion resistance according to the present invention;

[0022] Figure 3 is a schematic diagram of the structure of the support mechanism and the outer shell in a novel electrostatic demister with flame retardancy, conductivity, and sulfuric acid corrosion resistance according to the present invention;

[0023] Figure 4 is a schematic diagram of the structure of the support mechanism and a part of the outer shell in a novel electrostatic demister with flame retardancy, conductivity, and sulfuric acid corrosion resistance according to the present invention;

[0024] Figure 5 is a schematic diagram of the structure at the anode tube bundle in a novel electrostatic demister with flame retardancy, conductivity, and sulfuric acid corrosion resistance according to the present invention;

[0025] Figure 6 is a top view schematic diagram of the structure of the fixing plate for the anode tube bundle in a novel electrostatic demister with flame retardancy, conductivity, and sulfuric acid corrosion resistance according to the present invention;

[0026] Figure 7 is a schematic diagram of the structure at the connection between the top shell of the demister and the top horizontal frame in a novel electrostatic demister with flame retardancy, conductivity, and sulfuric acid corrosion resistance according to the present invention.

[0027] 1 - Support mechanism, 2 - Anode tube bundle, 3 - Anode tube bundle fixing plate, 4 - Top horizontal frame, 5 - Tube bundle support frame, 6 - Connecting vertical beam, 7 - Middle support beam, 8 - Middle reserved support position, 9 - Shell, 10 - Shell plate, 11 - Connecting angle steel, 12 - Fixed ear plate, 13 - Cathode wire, 14 - Top housing of demister, 15 - Top connecting plate, 16 - Support body, 17 - Bottom housing of demister, 18 - Bottom connecting plate, 19 - Cathode grid, 20 - Insulation box, 21 - Flow guiding device, 22 - Shunt grid. Detailed implementation manner

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. The described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0029] See Figure 1-7 To illustrate this embodiment, a new type of electrostatic demister with flame retardancy, conductivity and sulfuric acid corrosion resistance includes a support mechanism 1 and a plurality of anode tube bundles 2. The plurality of anode tube bundles 2 are arranged vertically in the support mechanism 1. A plurality of anode tube bundle fixing plates 3 are arranged in parallel along the vertical direction in the support mechanism 1. The anode tube bundle fixing plates 3 are used for fixing the anode tube bundles 2. The anode tube bundles 2 are arranged through the plurality of anode tube bundle fixing plates 3. The support mechanism 1 includes a top horizontal frame 4 and a tube bundle support frame 5 arranged in parallel. The top horizontal frame 4 is arranged above the tube bundle support frame 5. The top horizontal frame 4 and the tube bundle support frame 5 are connected by a plurality of connecting vertical beams 6. One of the anode tube bundle fixing plates 3 located below abuts against the tube bundle support frame 5 and cooperates with the tube bundle support frame 5. By providing the support mechanism 1, the original hanging structure is changed to a bottom support structure. The bottom support design is adopted to balance the stress distribution between the tube bundle and the shell, avoiding the risk of structural deformation caused by stress concentration in the upper and middle parts of the traditional hanging structure, and enhancing the overall support strength of the equipment.

[0030] In this embodiment, a middle support beam 7 is arranged on the tube bundle support frame 5. A middle reserved support position 8 corresponding to the middle support beam 7 is arranged on the anode tube bundle fixing plate 3. The middle reserved support position 8 of one of the anode tube bundle fixing plates 3 located below abuts against the middle support beam 7 and cooperates with the tube bundle support frame 5. The middle reserved support position 8 of the anode tube bundle fixing plate 3 is provided, and is effectively supported by the middle support beam 7 of the support mechanism 1, solving the problem of middle deformation when the number of tube bundles is large, and avoiding the reduction of demisting efficiency caused by structural collapse.

[0031] In this embodiment, the outer side of the support mechanism 1 is surrounded by a shell 9, and the shell 9 includes a plurality of shell plates 10. The shell plates 10 are made of metal and are arranged on the outer sides of a plurality of connecting vertical beams 6. A connecting angle steel 11 is arranged between the top of the connecting vertical beam 6 and the bottom of the top horizontal frame 4. The top of the shell plate 10 is connected to the connecting vertical beam 6 via the connecting angle steel 11. The shell 9 adopts a modular detachable shell plate 10, which can protect the tube bundle equipment, facilitate installation, and does not require non-metallic welding for on-site construction, significantly shortening the construction period. The modular structure supports local disassembly and maintenance without overall shutdown, greatly improving the continuity of system operation, and the entire metal shell is similar to a discharge wall, which can conduct all static electricity inside the equipment to the ground or safety facilities.

[0032] In this embodiment, both sides of the connecting vertical beam 6 are provided with fixed ear plates 12, and the two sides of the connecting vertical beam 6 are respectively connected to the outer shell plates 10 on both sides of the connecting vertical beam 6 through two fixed ear plates 12, and the fixed ear plates 12 and the connecting angle steels 11 are both used to fix the outer shell plates 10, and the fixed ear plates 12 and the connecting angle steels 11 are both connected to the outer shell plates 10 by bolts, which facilitates the installation and disassembly of the outer shell plates 10.

[0033] In this embodiment, a cathode wire 13 is passed through each of the anode tube bundles 2 , and both ends of the cathode wire 13 are passed through the anode tube bundle 2 .

[0034] In this embodiment, a demister top shell 14 is arranged above the multiple anode tube bundles 2, and a top connecting plate 15 is arranged at the top end of the multiple anode tube bundles 2. The multiple anode tube bundles 2 are connected to the demister top shell 14 through the top connecting plate 15. A plurality of supporting bodies 16 are arranged on the outside of the demister top shell 14. The bottom of the supporting body 16 is against the top horizontal frame 4 and cooperates with the top horizontal frame 4. The top connecting plate 15 is connected to the demister top shell 14 through a fixing steel ring and screws. The top horizontal frame 4 supports the demister top shell 14 through the supporting bodies on the outside of the demister top shell 14. A manhole is arranged on the outside of the demister top shell 14 for inspecting the structure inside the demister top shell 14.

[0035] In this embodiment, a demister bottom shell 17 is disposed below the multiple anode tube bundles 2, and a bottom connecting plate 18 is disposed at the bottom end of the multiple anode tube bundles 2. The multiple anode tube bundles 2 are connected to the demister bottom shell 17 through the bottom connecting plate 18. The bottom connecting plate 18 and the demister bottom shell 17 are connected by fixing steel rings and screws. A manhole is disposed on the outside of the demister bottom shell 17 for inspecting the internal structure of the demister bottom shell 17.

[0036] In this embodiment, cathode grids 19 are provided inside both the top housing 14 and the bottom housing 17 of the demister. Both ends of the cathode wire 13 are respectively connected to the two cathode grids 19, and the cathode grids 19 are used for fixing both ends of the cathode wire 13.

[0037] In this embodiment, a plurality of insulating boxes 20 are provided on the outer side of the top housing 14 of the demister.

[0038] In this embodiment, a flow guiding device 21 is provided inside the bottom housing 17 of the demister. The flow guiding device 21 is below the cathode grid 19 inside the bottom housing 17 of the demister. A flow splitting grid 22 is provided at the bottom of the flow guiding device 21. The bottom of the flow splitting grid 22 is connected to the bottom housing 17 of the demister through a support rod. The flow guiding device 21 is formed by connecting a plurality of flow guiding plate structures and plays a role in guiding the flow. The flow splitting grid 22 guides the gas to enter the tube bundle area evenly through its pore design, avoiding too high local flow velocity or forming turbulence, ensuring the maximization of the electric field effect, and improving the overall demisting effect.

[0039] The embodiments of the present invention disclosed above are only used to help illustrate the present invention. The embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. According to the content of this specification, many modifications and changes can be made. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present invention, so that those skilled in the art can well understand and utilize the present invention.

Claims

1. A novel electrostatic demister with flame retardancy, conductivity and sulfuric acid corrosion resistance, characterized in that: It comprises a support mechanism (1) and a plurality of anode tube bundles (2), wherein the plurality of anode tube bundles (2) are arranged vertically in the support mechanism (1), wherein a plurality of anode tube bundle fixing plates (3) are arranged in parallel in the vertical direction in the support mechanism (1), wherein the anode tube bundle (2) passes through the plurality of anode tube bundle fixing plates (3), wherein the support mechanism (1) comprises a top horizontal frame (4) and a tube bundle support frame (5) arranged in parallel, wherein the top horizontal frame (4) is arranged above the tube bundle support frame (5), wherein the top horizontal frame (4) and the tube bundle support frame (5) are connected via a plurality of connecting vertical beams (6), and wherein one of the anode tube bundle fixing plates (3) located at the bottom abuts against the tube bundle support frame (5) and cooperates with the tube bundle support frame (5).

2. A novel electrostatic demister with flame retardancy, conductivity and sulfuric acid corrosion resistance according to claim 1, characterized in that: The tube bundle support frame (5) is provided with a middle support beam (7), the anode tube bundle fixing plate (3) is provided with a middle reserved support position (8) corresponding to the middle support beam (7), and the middle reserved support position (8) of the anode tube bundle fixing plate (3) located at the bottom abuts against the middle support beam (7) and cooperates with the tube bundle support frame (5).

3. A novel electrostatic demister with flame retardancy, conductivity, and sulfuric acid corrosion resistance according to claim 2, characterized in that: The outer side of the support mechanism (1) is surrounded by a shell (9), the shell (9) comprising a plurality of shell plates (10), the shell plates (10) being made of metal material, the plurality of shell plates (10) being surrounded by the outer sides of a plurality of connecting vertical beams (6), a connecting angle steel (11) being provided between the top of the connecting vertical beam (6) and the bottom of the top horizontal frame (4), the top of the shell plate (10) being connected to the connecting vertical beam (6) via the connecting angle steel (11).

4. A novel electrostatic demister with flame retardancy, electrical conductivity, and sulfuric acid corrosion resistance according to claim 3, characterized in that: Both sides of the connecting vertical beam (6) are provided with fixed ear plates (12), and the two sides of the connecting vertical beam (6) are respectively connected to the outer shell plates (10) on both sides of the connecting vertical beam (6) through the two fixed ear plates (12).

5. A novel electrostatic demister with flame retardancy, conductivity and sulfuric acid corrosion resistance according to claim 1, characterized in that: A cathode wire (13) is passed through each anode tube bundle (2), and both ends of the cathode wire (13) are disposed outside the anode tube bundle (2).

6. A novel electrostatic demister with flame retardancy, conductivity, and sulfuric acid corrosion resistance according to claim 5, characterized in that: A demister top shell (14) is arranged above the plurality of anode tube bundles (2), a top connecting plate (15) is arranged at the top end of the plurality of anode tube bundles (2), the plurality of anode tube bundles (2) are connected to the demister top shell (14) via the top connecting plate (15), a plurality of supporting bodies (16) are arranged on the outer side of the demister top shell (14), the bottom of the supporting body (16) is against the top horizontal frame (4) and cooperates with the top horizontal frame (4).

7. A novel electrostatic demister with flame retardancy, electrical conductivity and sulfuric acid corrosion resistance according to claim 6, characterized in that: A demister bottom shell (17) is arranged below the multiple anode tube bundles (2), a bottom connecting plate (18) is arranged at the bottom end of the multiple anode tube bundles (2), and the multiple anode tube bundles (2) are connected to the demister bottom shell (17) via the bottom connecting plate (18).

8. A novel electrostatic demister with flame retardancy, conductivity and sulfuric acid corrosion resistance according to claim 7, characterized in that: Cathode grids (19) are arranged inside the demister top shell (14) and the demister bottom shell (17), and the two ends of the cathode wire (13) are respectively connected to the two cathode grids (19).

9. A novel electrostatic demister with flame retardancy, conductivity and sulfuric acid corrosion resistance according to claim 6, characterized in that: A plurality of insulating boxes (20) are arranged on the outside of the demister top shell (14).

10. A novel electrostatic demister with flame retardancy, conductivity and sulfuric acid corrosion resistance according to claim 7, characterized in that: A flow guiding device (21) is arranged inside the bottom shell (17) of the demister. The flow guiding device (21) is below the cathode grid (19) inside the bottom shell (17) of the demister. A shunt grid (22) is arranged at the bottom of the flow guiding device (21). The bottom of the shunt grid (22) is connected to the bottom shell (17) of the demister through a support rod.

Images